ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Springer  (146,830)
  • 1965-1969  (146,830)
Collection
Keywords
Publisher
Years
Year
  • 101
    Electronic Resource
    Electronic Resource
    Infrared absorption spectra of atmospheric dust over an interior desert basin (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 151-164 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Based on the qualitative microspectrophotometric analysis of 287 atmospheric dust samples taken within the surface boundary layer over south central New Mexico, U.S.A. from May 1966 through October 1967, a representative infrared absorption spectrum from 4000 to 250 cm−1 (2.5 to 40 μm) is presented. The strongest absorption band is centered at 1027 cm−1 (9,7 μm), within the 1250 to 770 cm−1 (8 to 13 μm) atmospheric window, and is silicate induced. Two other strong broad absorption bands are the carbonate band at 1425 cm−1 (7.0 μm) and the silicate band at 468 cm−1 (21.4 μm). Temporal variations in the absorption spectra of the dust are observed primarily in the varying relative intensities of the 1027 and 1425 cm−1 (9.7 and 7.0 μm) absorption bands and in the occasional enhancement of the 1027 cm−1 (9.7 μm) band caused by sulfates in the dust. This study indicates that there is a close similarity between the absorption spectra of the atmospheric dust and the spectra of the small particle fraction of area soils, and between the representative dust spectrum and a spectrum of a synthetic mixture (by weight) of 80% silicates, 16% carbonates, and 4% nitrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875195
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 102
    Electronic Resource
    Electronic Resource
    The thermal diffusivity of red sandy soil at Waltair (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 195-205 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The study of heat exchanges or temperature changes in the surface layers of the soil are important in agricultural science at tropical latitudes. The quantity, thermal diffusivity largely determines the temperature change produced in any layer of the soil when heat is conducted there from an adjacent layer. Therefore, the authors have determined the thermal diffusivity of the soil from range and lag methods suggested byJohnson andDavies [15]2) andCoutis [7] respectively. The values of diffusivity cbtained from these methods agree well with each other. The effect of soil moisture on diffusivity has been studied. The diffusivity increases with the increase of moisture in the surface layers of the scil. The ratio of ranges of soil temperature at different depths is found to be approximately constant which is in agreement with the theory of heat flow into the soils. The results of diffusivity obtained from these methods agree well with those results of past workers. The mean value of the thermal diffusivity of red sandy soil at the experimental site of Waltair is found to be 6.336×10−3 cm2/sec.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875198
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 103
    Electronic Resource
    Electronic Resource
    Interpretation of gravity and magnetic anomalies when observation plane is inclined (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 19-30 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Not infrequently, in mining geophysics, measurements have to be made on the slopes of a hill that contain mineralisation. In this paper, procedures are evolved for interpreting gravity and vertical component magnetic data collected on such slopes and caused by geological bodies that can be approximated by infinite line pole, point pole, infinite line dipole and point dipole. From sets of theoretical magnetic anomaly curves (not reproduced), graphs have been constructed using characteristic points and are reproduced in Figures 5 to 10 and 12 to 17. These can be used for direct determination of depths, offsets, etc., by using information from suitably chosen field profiles. In the case of gravity, the mass can be computed as usual by a surface integration, provided a correction factor (1/cos2α) is used, α being the angle of the slope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875038
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 104
    Electronic Resource
    Electronic Resource
    Phase velocities of Rayleigh waves in southeastern Europe and Eastern Mediterranean Sea (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 47-55 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Measurements of phase velocities along several paths in southeastern Europe and along one path in the Eastern Mediterranean have been made in the period range 15 to 60 sec for the fundamental mode of Rayleigh waves. The data are fitted by layered models of the crust and upper mantle. The crust in the Balkan peninsula is thicker than the normal continental crust by about 10 km while the crust in the northern Aegean Sea has the normal continental thickness. The existence of a low shear velocity layer of thickness equal to 140 km with its top in a depth of 90 km interpretes the data well for the longer periods. The data for the eastern Mediterranean show that this region has an oceanic character. The mean crustal thickness in this area is of the order of 20 km.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875041
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 105
    Electronic Resource
    Electronic Resource
    On radioactive equilibrium in atmospheric aerosols at 700 and 1800 m a.s.l., as influenced by particle size and vertical mixing activity (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 134-144 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Simultane Messungen der RaB- und RaC-Konzentration des atmosphärischen Aerosols an benachbarten Stationen in ca 700 und ca 1800 m a.s.l. werden benutzt um die Abhängigkeit des Verhältnisses der spezifischen Aktivitäten RaB/RaC auf Aerosolpartikeln von der Stärke des Vertikalaustausches, und von der Grösse der Aerosolpartikel abzuschätzen. Es werden die während einer 15-monatigen kontinuierlichen Meßperiode gesammelten empirischen Erfahrungen dargestelit. Die Annäherung an das radioaktive Gleichgewicht ist an Aerosolpartikeln vonD〉1 μm stets und unabhängig von der Seehöhe weiter fortgeschritten, als an den kleineren und kleinsten Partikeln. Der Grad der Gleichgewichtseinstellung RaB/RaC ist in niedriger Höhe (700 m) bei sehr schwachem Austausch am geringsten (65–75%) und steigt mit wachsender Austauschstärke bis zu einem Maximum von 80–90% an. Umgekehrt nimmt in 1800 m der Grad der Gleichgewichts-einstellung RaB/RaC von nahe 100% bei sehr schwachem Austausch bis auf 60–70% bei starkem Austausch ab.
    Notes: Summary Data from simultaneous measurements of RaB and RaC concentration in atmospheric aerosols, taken at sites located roughly 700 and 1800 m a.s.l., are used to elucidate the relation of the ratio of the specific activities of RaB and RaC in aerosol particles on the one hand to the intensity of vertical mixing and the size of the aerosol particles on the other. The empirical relationships as found from a 15-month period of uninterrupted measurements are presented. Radioactive equilibrium is more nearly approached in aerosol particles of more than one micron in diameter than in smaller ones (including the smallest measurable sizes); this holds invariably — and for all height levels. The degree of approach to RaB/RaC equilibrium is the lowest for low altitude (700 m) and negligible vertical mixing: 65% to 75%. At the low-altitude site this figure increases to 80%–90% as the intensity of vertical mixing reaches higher levels. At 1800 m a.s.l., the degree of approach to RaB/RaC equilibrium is nearly 100% when vertical mixing is negligible, and declines with increased vertical mixing activity to a level of only 60–70% for conditions involving strong vertical mass exchange.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875193
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 106
    Electronic Resource
    Electronic Resource
    The relation between solar radiation and hours of bright sunshine at some tropical stations (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 186-194 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The relationship between (Q) total solar radiation, as measured by a solarimeter, and hours of bright sunshine (n), as measured by a Campbell-Stokes recorder, has been examined on a monthly basis for three tropical stations Madras, Waltair and Nagpur. The regression equations relating the data are calculated in the non-dimentional form of Ångström type $$Q = Q_A \left( {a + b\frac{n}{N}} \right)$$ whereQ A is the maximum possible radiation andN in the maximum possible duration of bright sunshine. The individual regression relationships for the three stations are also verified; the agreement between the computed values and observed solar radiation is good. It has been shown that the slope of the relationshipb is approximately constant, while the value ofa is a function of latitude. An empirical relationship leading to the Ångström equation at latitude θ over the range 0°–60° as derived byGlover andMcCulloch [13]2) gives values in reasonable accord. A combined equation for the three stations of the form $$Q/Q_A = 0.29 \cos \phi + 0.51\frac{n}{N}$$ has been presented. The sum ofa andb has been shown to lie around a mean of 0.77, in good agreement with the other workers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875197
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 107
    Electronic Resource
    Electronic Resource
    Weiteres zur unmittelbaren Berechnung der durchschnittlichen Geschwindigkeit in der Reflexionsseismik (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 61-75 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The system of shot points I, II, ...A, B ... and geophones 1, 2 ...a, b according to Figure 1 assures — assuming horizontal reflector — by identical reflection point an advantageous determination of the average velocity and of the reflector by adjustment with equations (3)-(6). These equations can also be used if the reflector dips, as the error caused even by a dip of 11° of the reflector inv andN does not exceed 0.5 percent. The reflection point moves, however, simultaneously (see Figure 2) with the quantily Δr according to equations (17a). If the dip ϱ of the intersection line in the reflection plane is known, the more precise values ofv andN can be computed with the aid of equations (12) and (14). To determine the dip ϱ, the system of Figure 3 is most convenient, where the geophons 1, 2 ...a, b ... are attached to a shot inI/A. In the appendix some numerical solutions are given and practical consequences drawn.
    Notes: Zusammenfassung Die Anordnung der Schusspunkte I, II ...,A, B ... und der Geophone 1, 2, ...a, b ... nach Figur 1 ermöglicht — horizontalen Reflektor vorausgesetzt — bei demselben Reflexionspunkt eine gute Bestimmung der durchschnittlichen Geschwindigkeiit und des Reflektors durch Ausgleichung mit den Gleichungen (3)-(6). Die angegebenen Gleichungen können auch bei geneigtem Reflektor verwendet werden, da sogar bei 11° Neigung des Reflektors der dadurch verursachte Fehler inv undN unterhalb 0.5% bleibt. Der Reflexionspunkt wandert in diesem Falle allerdings (vgl. Figur 2) mit dem Betrag Δr im Sinne der Gleichung (17a) weiter. Kennt man die Neigung ϱ der Schnittgeraden in der Reflexionsebene, so kann man mit Hilfe der Gleichungen (12) und (14) die genaueren Werte vonv undN ermitteln. Zur Bestimmung des Neigungswinkels ϱ wird man vorteilhaft die Anordnung nach Figur 3 treffen, wo bei einem Schuss in I/A die Geophone in 1, 2 ...,a, b ... angeordnet sind. Aus den Messergebnissen können wir ϱ durch Ausgleichung nach den Gleichungen (23) und (24) bestimmen. Im Anhang werden Zahlenbeispiele mit praktischen Folgerungen angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875043
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 108
    Electronic Resource
    Electronic Resource
    Pole-to-pole moisture conditions for the IGY (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 300-331 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A study of the mean atmospheric humidity conditions on a planetary scale during the IGY covering the calendar year 1958 is presented. The fields of mean precipitable water content and of the zonal and meridional transports of water vapor are analyzed for the entire globe. Zonally averaged values of the various quantities at several levels are presented in tabular form and compared whenever possible with previous results or indirectly are analyzed on the basis of information obtained from different sources. The structure of these fields is studied and the corresponding implications for the general circulations of the atmosphere are discussed. Finally the zonal water balance for all the globe is discussed and its implications analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875063
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 109
    Electronic Resource
    Electronic Resource
    The pattern of surface wind flow in Antarctica (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 332-354 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The main characteristics of surface winds are tabulated for 34 Antarctic stations. Using these data, supplemented by traverse records, the average wind flow is interpolated for each region and presented as a map showing the pattern of surface wind flow for the whole continent. Attention is focused on the flow in relation to surface contours. Statistics are presented for surface slope, wind speed, temperature, seasonal variations of speed and temperature, diurnal variation (including power spectra) of the wind speed and times of maximum and minimum speed at coastal and inland stations, wind frequency versus direction, the occurrence of calms, the deviation of the plateau wind from the downslope direction, the wind direction near the front of ice shelves, the proportion of cloud cover, and wind chill factors. In all cases data are grouped according to the environs of the stations in an attempt to isolate systematic differences depending on location: coastal stations near the foot of the ice slope and fully exposed to katabatic flow, coastal stations on offshore islands, coastal stations on peninsulas, coastal stations on extensive rock areas, ice shelf stations and inland stations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875064
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 110
    Electronic Resource
    Electronic Resource
    Study of sensible fluxes from different climatic stations (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 365-374 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Two methods of the evaluation of sensible heat flux are briefly presented from the view point of their application to micrometeorology. The comparison of sensible fluxes for coastal and inland stations is presented, in order to explain the influence of the marine atmosphere on these fluxes. They reach a maximum value in summer at the coastal stations, due to maximum wind speed and high convective activity developed by the influence of the marine atmosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875066
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 111
    Electronic Resource
    Electronic Resource
    Magnetoelastic disturbances in a perfectly conducting cylindrical shell in a constant magnetic field (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 56-64 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The paper deals with the problem of determining the displacements, stresses, magnetic and the electric fields of an infinite shell placed in vacuum and subjected to an impulsive excitation load.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877836
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 112
    Electronic Resource
    Electronic Resource
    Thermo-elastic Rayleigh waves in transversely isotropic solids (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 79-86 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The frequency equation of the thermo-elastic Rayleigh waves in a semi-infinite transversely isotropic solid has been obtained. The form of the frequency equation for small values of the reduced frequency has also been deduced, and it is found that, as in the isotropic medium, the velocity does not depend on the frequency. But unlike the isotropic case, the velocity depends upon the thermal constants as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877839
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 113
    Electronic Resource
    Electronic Resource
    Field-induced anisotropy of magnetic susceptibility in rocks (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 123-129 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary An induced anisotropy of magnetic susceptibility results from the domain alignment which is produced by treating stationary specimens in a strong alternating field. Appreciable domain re-orientation occurs in fields as low as 50 oersteds and the effect must therefore normally be an important part of the process of alternating field demagnetization. Induced anisotropy has been measured in a number of igneous rocks with a range of palaeomagnetic stabilities and in magnetite powders of controlled grain sizes, dispersed in plaster or kaolin specimens which were mechanically deformed to produce instrinsic magnetic anisotropy by grain alignment. The saturation magnitude of the induced anisotropy is not a function of grain size but the saturating field required increases with decreasing grain size. In the larger grains, induced anisotropy is a function of grain orientation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877845
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 114
    Electronic Resource
    Electronic Resource
    Transmission of elastic pulses in bars (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 110-122 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The transmission of elastic pulses through solid bars has been investigated experimentally with particular reference to the shape of the bars. A single input pulse giving rise to a series of pulses at the receiver which help in the computation of dilatational and rotational velocities in the material has been exploited for the experimental work, and it has been found that the method is applicable to cylindrical and cubical (square) bars in an equal manner. Results of the experimental investigations carried out in cylindrical and square bars of brass are compared and found to be in good agreement. Also results in square bars of Aluminium, Steel, and a few rock samples are reported. The rock samples studied include limestone, sandstone and a crypto-crystalline rock. An attempt to study the applicability of this method to rectangular bars has also been made and the results obtained are consistent and in agreement with the results due to cylindrical and square bars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877844
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 115
    Electronic Resource
    Electronic Resource
    New books (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 153-157 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877849
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 116
    Electronic Resource
    Electronic Resource
    A new technique of interpreting gravity and vertical magnetic anomalies due to infinite horizontal cylindrical ore bodies (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 5-10 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A novel method of interpreting gravity and magnetic anomalies is presented here. Two diagrams of master curves, one for gravity and the other for vertical magnetic interpretation are presented. They are useful in calculating the depth of burial and the radius of infinite horizontal cylindrical bodies irrespective of density contrast or strength and direction of magnetisation. This method also enables us to infer the direction of magnetisation, resultant intensity of magnetisation and from them the susceptibility contrast; and density contrast. ThoughHenderson [8]2) reported the applicability of continuations and derivatives in the interpretation of magnetic anomalies for the first time, the authors have treated them in a more exhaustive manner in the present paper to obtain valuable relationships.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875997
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 117
    Electronic Resource
    Electronic Resource
    Die elektrische Ladung eines ausgedehnten, isolierten Cirrus nothus (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 21-26 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Bis heute vorliegende direkte Messungen von Grösse und Polarität elektrischer Ladungen in verschiedenen Stockwerken von Gewitterwolken mittels Sondierungen verschiedener Art liefern noch kein widerspruchsfreies Bild. Unter gewissen günstigen Umständen erlauben kontinuierliche synoptisch-luftelektrische Registrierungen an Stationen in verschiedenen Höhen wertvolle ergänzende Einblicke. Es wird über Meßergebnisse unter einem weit ausladenden, vom inzwischen abgestorbenen Gewitterherd abdriftenden Amboßschirm (Cirrus nothus) berichtet. Seine Ladung war einheitlich positiv und betrug maximal 2.5·10−8 Cb/m2 (die Wolke als sehr dünne Schicht betrachtet). Sie schwankte jedoch stark als Folge von Turbulenz und der Inhomogenität der Ladungsverteilung. In Übereinstimmung mit anderen, ähnlichen Beobachtungen kann der Amboß einer Gewitterwolke als grundsätzlich positiv geladen gelten. Als Gesamtladung des Cirrus nothus über dem Generator können +150 Cb geschätzt werden.
    Notes: Summary The results of direct measurements of the magnitude and sign of electrical charges at different levels in thunderstorm clouds, as derived from soundings of various types, do not, as yet, furnish a consistent picture. Under specific favorable circumstances, valuable additional information may be gained by using continuous, synoptic atmospheric-electrical recordings made at fixed sites at different elevations. — Results of measurements below an extensive anvil cloud (cirrus nothus) are stated. This cloud was drifting away from its source — an extinct thunderstorm cell — at the time the observation was made. The charge of this sheet cloud was consistently positive with a maximum of 2.5·10−8 Cb/m2. — In this study, the cloud is treated as a very thin layer; we must, however, bear in mind that there are marked intracloud variations on account of turbulence and irregular charge distribution. As in other, similar cases, the anvil of a thunderstorm cloud may be regarded as bearing positive space charge. The total charge of the anvil cloud above the generator cell may be estimated to be +150 Cb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875999
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 118
    Electronic Resource
    Electronic Resource
    Longitudinal vibration of a slender bar with nonuniform characteristics in presence of a magnetic field (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 92-99 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In the present article the magnetic influence on the free vibrations of a slender bar with characteristics slightly different from those of a uniform one has been discussed. It presents a simple approximate solution to this problem. Moreover the frequency equation has been derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877841
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 119
    Electronic Resource
    Electronic Resource
    Propagation ofSH-waves in a heterogeneous visco-elastic layer overlying a homogeneous voigt medium (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 100-106 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The propagation ofSH-waves in a vosco-elastic layer having variable material properties has been studied to explain the damping phenomenon of the wave motion. The damping coefficient may be calculated and the effect of heterogeneity on such type of wave motion may be observed from the obtained frequency equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877842
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 120
    Electronic Resource
    Electronic Resource
    Polarization of reffected solar radiation over land, sea and cloud surfaces (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 151-158 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Results of the measurements of the polarization of reffected solar radiation in the visible region over various land, sea and cloud surfaces carried out from a high altitude aircraft are presented. It is shown that the measurable polarization can be used as a sensitive parameter to determine atmospheric turbidity and the aerosol content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876009
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 121
    Electronic Resource
    Electronic Resource
    On the Aerosol factor in the twilight method) (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 159-167 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung An Meßreihen der Himmelslicht-Polarisation in der Dämmerung von verschiedenen Meßorten wird nachgewiesen, daß die Zenitpolarisation von der troposphärischen Trübung noch in der mittleren Dämmerungsphase beeinflußt wird. Dieses Ergebnis ist für die inverse Aufgabe der Dämmerungstheorie wichtig. 3 Möglichkeiten der Erklärung dieses Effekts werden untersucht. —Aerosol im Mesopausenbereich ist die Ursache für die bekannte Stufe in der Polarisationskurve während der mittleren Dämmerungsphase. Diese Deutung kann durch die deutlichen spektralen Unterschiede gestützt werden.
    Notes: Summary It is proved by means of measuring series for skylight polarization during twilight carried out at different places that the zenith polarization is affected by the tropospheric turbidity still during the middle phase of twilight. This result is important for the inverse problem of the twilight theory. 3 approaches which explain this effect are examined. — Aerosol in the mesopause region is the cause for the well-known dip in the polarization curve during the middle phase of twilight. This interpretation can be supported by the distinct spectral differences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876010
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 122
    Electronic Resource
    Electronic Resource
    Effect of some co-dissolved inorganic groups on the photodecomposition of aqueous nitrates (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 201-206 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The rate of nitrite formation, in UV-irradiated aqueous solutions of alkali metals, is found to depend on co-dissolved chemical compounds and on their reactivities. The effect of some common and simple components of the atmospheric aerosol is investigated in the laboratory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876015
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 123
    Electronic Resource
    Electronic Resource
    A study of the atmospheric circulation between equator and 60oN during the winter and summer seasons (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 207-226 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The mean zonal and meridional wind components and the mean mass circulation in different latitudes are discussed in relation to previous studies. Divergence and vertical motion are calculated for various latitude belts. There is evidence for a strong tropical Hadley cell with a temperate latitude indirect circulation during the winter season. During summer, the northern Hadley cell is weaker and displaced poleward; a circulation in the opposite sense appears in equatorial latitudes. The regional patterns of divergence and vertical motion appear related particularly to the position of the subtropical high pressure cells. Subsidence and lower-layer divergence are characteristic of the eastern flanks of the subtropical anticyclones, while the opposite pattern prevails on its western flanks. These longitudinal contrasts appear particularly pronounced during the summer season. The three-dimensional flow pattern in the tropics is illustrated by selected trajectories for the winter and summer seasons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876016
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 124
    Electronic Resource
    Electronic Resource
    A meridional surface wind speed profile in MacRobertson Land, Antarctica (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 193-200 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A surface wind vector profile along the 62° East meridian in Antarctica is constructed from field observations extending from 600 kilometers inland to 16 kilometers offshore. The theory of gravity winds proposed byF. K. Ball is used successfully to explain this profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876014
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 125
    Electronic Resource
    Electronic Resource
    Book reviews (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 227-228 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876017
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 126
    Electronic Resource
    Electronic Resource
    The rôle of chemicals in communication in the harvester termitesHodotermes mossambicus (Hagen) andTrinervitermes trinervoides (Sjöstedt) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 79-86 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The components of trail-laying and trailfollowing behaviour in the harvester termitesHodotermes mossambicus (Hagen) andTrinervitermes trinervoides (Sjöstedt) were investigated. In both species the trails are laid by pressing the third to sixth abdominal segments against the substratum. The trails are detected by olfactory receptors which are found on the antennae—principally on the distal one third.H. mossambicus trails andT. trinervoides trails laid on paper persisted for approximately 90 and 20 minutes respectively at 23° C±1° C. T. trinvervoides trail substances were steam volatile, but steam distillates ofH. mossambicus individuals were inactive. Ethanol or diethyl ether extracts ofH. mossambicus were, however, active. The volatile components of the secretions of the nasuteT. trinervoides soldiers were collected by drawing an air shtream over fighting colonies and passing it through gas scrubbing bottles containing appropriate solvents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224466
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 127
    Electronic Resource
    Electronic Resource
    Importance deVernonia guineensis Benth. dans l'alimentation de quelques Fourmis de savane (1969)
    Springer
    Insectes sociaux 16 (1969), S. 115-133 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Vernonia guineensis Benth. (Compositæ). common in the forest-savanna mosaic of Ivory Coast, blooms a few weeks after the fires. Several species of Ants are collected then on the forb; especiallyCamponotus acvapimensis and a species ofCremastogaster (Acrocœlia). These ants feed on seepings from the young flower heads, and search for exsudates of Homopterans. Various buildings are described, particularly shelters made byC. acvapimensis for the leaf—hopperSelenocephalus sp. Influence of botanical environment on the ants exploitingV. guineensis is shown.
    Notes: Résumé La ComposéeVernonia guineensis Benth., abondante dans les savanes préforestières de Côte d'Ivoire, fleurit quelques semaines après le passage des feux de brousse. Plusieurs espèces de Fourmis sont récoltées régulièrement sur la plante: ce sont surtoutCamponotus acvapimensis et unCremastogaster du genreAcrocœlia. Les Fourmis se nourrissent de sécrétions sucrées qui suintent au niveau des bractées des jeunes capitules, mais pratiquent également l'élevage d'Homoptères. Divers types de constructions sont décrits et, en particulier, les loges édifiées parC. acvapimensis pour abriter un Jassidæ:Selenocephalus sp. L'influence de l'environnement végétal sur la faune myrmécologique exploitantV. guineensis est mise en évidence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02226374
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 128
    Electronic Resource
    Electronic Resource
    Composition des colonies de termites: Ses fluctuations au cours du temps (1969)
    Springer
    Insectes sociaux 16 (1969), S. 39-53 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1 The numeration ofCubitermes'severus populations enable to state precisely the polymorphism's variations during the society's development (three stages: youngness, maturity, senility; the second one is reach when nympha are regularly produced) and during the seasonal cycle. For the other Termites of this savannah, we reach to the same conclusions. 2 On the other hand, we bring some arguments about castes' determinism (partition between neuter and sexual Termites; formation of soldiers).
    Notes: Résumé 1 La numération des populations deCubitermes severus a permis de préciser les variations du polymorphisme dans le temps. Au cours de son développement, une société deCubitermes severus passe par trois stades successifs: un stade de jeunesse, un stade adulte et un stade sénile. La «maturité» d'une colonie est atteinte lorsque celle-ci produit régulièrement des nymphes de sexués ailés. Au cours d'une même année, on observe au sein d'une colonie deCubitermes severus des fluctuations dans la représentation des différentes castes; ces variations s'harmonisent avec le cycle des pluies: on peut alors parler d'un cycle saisonnier de reproduction. Pour tous les Termites inventoriés dans les savanes de basse Côte-d'Ivoire, des observations parfois fragmentaires aboutissent à des conclusions analogues. 2 Par ailleurs, nous apportons quelques arguments relatifs au déterminisme des castes (séparation des neutres-sexués, formation des soldats).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224461
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 129
    Electronic Resource
    Electronic Resource
    Separation of the castes ofPolistes exclamans and notes on its biology (Hym.: Vespidae) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 67-72 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé 1. Dans les populations des nids automnaux dePolistes exclamans il y a des ouvrières et des fondatrices-filles dont les caractéristiques externes ne sont pas reconnaissables. Pourtant, les castes peuvent être reconnues si nous examinons le corps gras des régions pariétales; nous y trouvons des différences d'ordre quantitatif et qualitatif. 2. Nous trouvons aussi, parmi les femelles de cette espèce, une corrélation entre le type de corps gras et l'intensité de la pigmentation de l'œil. 3. La fréquence des transferts de mâles, d'un nid à l'autre, est très faible. 4. Polistes exclamans est différente des autres espèces américaines de ce genre car elle semble être la seule qui, dans certaines régions de sa distribution, soit complètement haplométrotique; du point de vue de l'évolution de cette espèce, il est probable qu'il y ait une relation avec sa plus grande disposition pour le mouvement (Vagilité). La dispersion des nids pourrait réduire le parasitisme.
    Notes: Summary 1. Autumnal nest populations ofPolistes exclamans include externally indistinguishable workers and future queens. Qualitative as well as quantitative caste differences were found in the parietal fat body. 2. An interesting correlation exists between the type of fat body and amount of eye pigmentation in females of this species. 3. The frequency of transfer of marked males between nests was found to be very low. 4. Polistes exclamans is unusual among North American members of its genus in that it appears to be almost completely haplometrotic in parts of its range. This may be evolutionarily connected with the species' comparatively greater vagility and tendency to disperse. Nest dispersal may reduce the rate of parasitism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224464
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 130
    Electronic Resource
    Electronic Resource
    Sur deuxAphænogaster rares d'Algérie (Hyménoptères Formicidæ, Myrmicinæ) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 103-114 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Riassunto Aphænogaster prædo (Emery), una formica conoscita soltano del Atlas marocchino, e stato trovata sul territorio algeriano, nelle monte nelle vicinanze della città d'Aïn-Sefra; e descritta per le tre caste. La spècie vicina,Aphænogaster rupestris (Forel) que e stato trovata nel Monte Bou-Taleb, e descritta anche per le tre caste.
    Abstract: Summary Aphænogaster prædo (Emery), a ant knew from the Atlas of Morocco, has been found on the algerian territory, in the mountains around Aïn-Sefra-city.A. prædo is described again for the three castes. Aphænogaster rupestris (Forel) is akin to this species;A. rupestris has been rediscovered in the Bou-Taleb mountain (near to Setif town), is described again for the three castes.
    Notes: Résumé Aphænogaster prædo (Emery), fourmi connue de l'Atlas marocain, a été trouvée sur le territoire algérien dans les montagnes entourant Aïn-Sefra; elle est redécrite pour les trois castes. L'espèce voisine,Aphænogaster rupestris (Forel), qui a été retrouvée au Djebel Bou-Taleb (Sétif), est également redécrite pour les trois castes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02226373
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 131
    Electronic Resource
    Electronic Resource
    Male production in the antMyrmica rubra L. (1969)
    Springer
    Insectes sociaux 16 (1969), S. 249-268 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02308998
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 132
    Electronic Resource
    Electronic Resource
    Observations sur la structure du système nerveux céphalique (cerveau, masse sous-œsophagienne et complexe rétro-cérébral) de la fourmiAphænogaster senilis (Mayr, 1853) (Hymenoptera myrmicinæ) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 135-148 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary The structure of the cephalic nervous system has been studied in the three castes of the antAphænogaster senilis on paraffin sections stained by general methods. - Among ocelli (present only in sexed individuals), the median one is supplied with two nervous roots. - The corpora pedunculata are more developed in queens and workers than in males. - The deutocerebrum consists of two distinct regions: a well developed sensory area (=olfactory lobes), and a motor one in a sub-oesophageal position. - The tritocerebrum, extremely reduced, consists of two small lobes placed one against the other under the digestive tract. - The recurrent nerve, at the level of the retro-cerebral complex, is situated in a peri-oesophageal sheath which is the anterior prolongation of the cephalic aorta. There is no genuine hypocerebral ganglion.
    Notes: Résumé La structure du système nerveux céphalique a été étudiée dans les trois castes de la fourmiAphænogaster senilis sur des coupes à la paraffine colorées par des techniques simples. - Parmi les ocelles (présents uniquement chez les individus sexués), l'ocelle médian possède une double racine nerveuse. - Les corps pédonculés sont plus développés chez les reines et les ouvrières que chez les mâles. - Le deutocérébrum comporte deux régions distinctes: une sensorielle très développée (=lobes olfactifs), et une motrice en position sous-œsophagienne. - Le tritocérébrum, extrêmement réduit, est constitué par deux petits lobes placés l'un contre l'autre sous le tube digestif. - Le nerf récurrent, au niveau du complexe rétro-cérébral, est logé dans un manchon péri-œsophagien qui est un prolongement antérieur de l'aorte céphalique. Il n'y a pas de véritable ganglion hypocérébral. - Les tailles des corpora allata et des corpora cardiaca varient avec la caste. Elles sont maximales chez les reines, et minimales chez les mâles. Chaque corpus cardiacum est innervé par un nerf unique résultant de la fusion de deux racines intracérébrales.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223405
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 133
    Electronic Resource
    Electronic Resource
    Preliminary studies on the control of caste formation in the harvester termiteHodotermes mossambicus (Hagen) (1969)
    Springer
    Insectes sociaux 16 (1969), S. 159-172 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The control of caste formation in the harvester termiteHodotermes mossambicus (Hagen) was investigated. Normal laboratory colonies contained a primary reproductive pair, between 6.59 and 24.98% workers, 0.39 and 3.45% soldiers and 74.64 and 92.06% larvae. Supplementary reproductives did not develop in colonies deprived of their king and queen. Continuous removal of soldiers stimulated soldier production. We have suggested that a pheromone produced by the soldiers plays a major role in controlling the soldier population of a colony. A similar phermone system appreared to control the production of workers. Evidence was also obtained that the primary reproductive pair influenced the production of workers and soldiers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223407
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 134
    Electronic Resource
    Electronic Resource
    Anatomie comparée du tube digestif des termites II. — Sous-famille des nasutitermitinae (1969)
    Springer
    Insectes sociaux 16 (1969), S. 195-233 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223410
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 135
    Electronic Resource
    Electronic Resource
    Determination of magnitude by use of seismographs recording ground velocity (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 72-75 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Two electromagnetic seismographs HSJ-I, which are coupled with short-period galvanometers, record the velocity of the ground motion in the range of periods from 0.3 to 20 s in the seismological station Moxa. In this way the magnitude of an earthquake can be calculated without respect to the period of the ground motion. The results of such a determination of magnitudes are compared with those reached in the usual manner from short and long-period seismographs recording the ground displacement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875694
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 136
    Electronic Resource
    Electronic Resource
    Geothermic models of variable thermal conductivities and source functions (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 90-116 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Temperature distributions are investigated for the stratified earth having planar and spherical boundaries under the assumptions of (i) Steady state heat flow (ii) layered non-uniform distribution of sources, and (iii) non-uniform thermal conductivities in each individual layer. The non-uniformity in source conditions and conductivity distributions is approximated by exponential and generalized power law functions of depths. The corresponding heat conduction equations are solved so as to satisfy an appropriate set of boundary conditions. The solutions will be useful in providing an analytical basis for an accurate and reliable description of the (a) thermal structure for a variety of new models, and (b) complex interplay of source and conductivity variations in defining possible temperatures in the interior of the earth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875697
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 137
    Electronic Resource
    Electronic Resource
    Magnetohydrodynamic disturbances in the earth's core, II (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 155-176 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In paper I, (Mohandis [2]2)), the author contributes to the discussion of the origin of the secular variation of the earth's magnetic field. A mathematical solution of magnetohydrodynamic disturbances and fluid motion due to the sudden introduction of an oscillating dipole in the earth's core has been obtained. Only the symmetrical case of the problem, where the axis of the dipole is placed perpendicular to the mantle and parallel to a poloidal field, has been discussed. In this paper, the source of disturbance is still considered to be the oscillating dipole, but the exciting field is taken as a toroidal field always parallel to the mantle. Two unsymmetric different cases of the problem are considered but the disturbed field is sonsidered only in the mantle. It is worth to note here that simpler results can be obtained by applying more conditions than those used in the present work. The new method will be illustrated in a forthcoming paper of this series, ‘Magnetolydrodynamic disturbances in the earth's core, IV’ where another case of the problem will be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875701
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 138
    Electronic Resource
    Electronic Resource
    On the formulation of a nonlinear atmospheric tidal theory from the meteorological primitive equations (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 198-203 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The theory of atmospheric tides is derived from the meteorological primitive equations by means of a perturbation expansion in Rossby number. Separation of the system for the first order variables into the standard horizontal and vertical structure equations of tidal theory is effected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875704
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 139
    Electronic Resource
    Electronic Resource
    Upward flux of RaB and RaC in the planetary boundary layer as controlled by atmospheric microstructure (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 247-258 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Simultane Messungen der RaB- und RaC-Konzentration der Luft an 3 Bergstationen von geringem horizontalem Abstand aber mit relativ grossen Höhenunterschieden (Stationsniveau rund: 700, 1800 und 3000 m a.s.l.) werden benutzt um die vertikalen Mischungs-und Transportvorgänge und ihre Abhängigkeit von der atmosphärischen Feinstruktur zu studieren. Die RaB-Konzentration der Luft reagiert nämlich sehr empfindlich auf Schwankungen der Austauschintensität. Im Falle einer kräftigen Inversion zwischen 700 und 2500 m a.s.l. fällt die RaB-Konzentration über dieses Höhenintervall hinweg auf 0,1% des Basiswertes ab, bei turbulentem Austausch herrscht fast Konzentrationsgleichheit. Aus den vertikalen RaB-Konzentrationsgradienten werden mittlere vertikale Austauschkoeffizienten berechnet und diese zur atmosphärischen Struktur in Beziehung gesetzt. Es zeigte sich dabei, dass die Sperrwirkung einer Inversion nur durch die Steilheit der Temperaturänderung im Inversionsbereich bedingt ist. Probleme des radioaktiven Gleichgewichts zwischen RaB und RaC werden diskutiert. Auch die Bedeutung der Aerosolpartikelgrösse wird mit in Betracht gezogen.
    Notes: Summary Vertical mixing and transport processes are studied, and their variation as influenced by atmospheric fine-structure conditions investigated, using data gathered from simultaneous measurements of RaB and RaC concentration in the ambient air at three mountain stations located close to each other horizontally, but at markedly differing levels (730, 1780 and 2960 m). RaB was used as a tracer on account of the high sensitivity to variations of vertical-mixing activity evidenced by RaB abundance figures. Strong inversions between 700 and 2500 m a.s.l. create a ‘zero condition’ at the higher level, where only 0.1% of the low-level RaB reading obtains; active turbulent mixing, on the other hand, leads to nearly equal RaB readings at the two levels. The vertical gradient of concentration of RaB is used to compute mean vertical-mass-exchange coefficients; the latter are studied in their relation to atmospheric structure characteristics. Statistical studies indicate that the barring effect of inversions is related solely to the magnitude of the inverse temperature gradient. Problems of radioactive equilibrium RaB-RaC are discussed, and the significance of aerosol particle size taken into consideration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875708
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 140
    Electronic Resource
    Electronic Resource
    Solar flares and their impact on potential gradient and air-earth current characteristics at high mountain stations (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 259-267 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Recordings of potential gradient and air-earth current in fair-weather conditions were made at high-elevation mountain stations; the latter were generally above the vertical-mixing layer and not disturbed by local sources. Both electrical quantities increased significantly from the day of appearance of a solar flare (or a maximum incidence of flares) till the fourth day after the event. Peak potential gradient and air-earth current exceed the ‘normal levels’ measured during quiet-sun conditions by 50–60% in terms of averages. This result was compared with sferics incidence data and daily geomagnetic coefficients grouped around the selected (flare) dates. Both of the latter quantities show time histories (for the days preceding and following the selected dates) closely correlated with the atmospheric-electrical histories of the same intervals. We may conclude from these results that the total potential between the ground and the upper atmosphere increases for several days after solar flares. The results obtained by previous studies on Mauna Loa confirm this inference. The cause of the phenomenon is presumed to be enhanced thunderstorm activity attendant on solar disturbances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875709
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 141
    Electronic Resource
    Electronic Resource
    Change of aqueous sodium nitrate under natural and artificial ultraviolet radiation (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 291-298 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The process of nitrite formation, by the action of the near-ultraviolet radiation on sodium nitrate solutions, is investigated both in the laboratory and at different elevations under sunlight. The release of NO x , from solutions irradiated, is found to compete with the generation of nitrite which is proportional to the radiation absorbed by the solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875712
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 142
    Electronic Resource
    Electronic Resource
    Propagation of Love type waves in a non-homogeneous layer lying over a vertically semi-infinite homogeneous isotropic medium (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 47-59 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The aim of this paper is to study the propagation of love-type waves in a homogeneous half-space overlain by a heterogeneous crust with various types of heterogenety. Frequency equations are obtained in each of the cases and numerical calculations are done in some cases and the results thus obtained are compared with those done byJeffreys andMitra [3]2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875121
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 143
    Electronic Resource
    Electronic Resource
    High sensitive electromagnetic seismographs with extinct galvanometer reaction and sensitivity control (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 120-128 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Introducing a resonant shunt consisting of an inductance, a capacity and a resistor into the coupling circuit between the galvanometer and the seismometer, the galvanometer reaction can be extinguished exactly. The inductance can be omitted for electromagnetic broad-band seismographs. By means of an attenuator the maximum sensitivity can be reduced arbitrarily without distortion of the response characteristic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875129
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 144
    Electronic Resource
    Electronic Resource
    An application of isallo stress theory to a surface fracture analysis of the Larderello area in Italy (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 134-142 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Riassunto Il sistema di fracture nella zona di Larderello in Italia è analizzato con l'aiuto della teoria interpretativa detta «isallo stress theory». Alcuni concetti di carattere generale vengono discussi, e le locali caratteristiche geologiche sono brevemente descritte. La direzione di massima compressione orizzontale (PHS) è scelta sulla base di considerazioni sulla tettonica della zona. I risultati cui si perviene sono in soddisfacente accordo con quelli postulati in base ad osservazioni di carattere puramente geologico, e permettono di avanzare una spiegazione unitaria dell'origine delle fratture.
    Notes: Summary An isallo stress analysis of the fracture field in the area of Larderello, Italy, is carried out. Some of the general implications of the theory are discussed, and the local geological features of the area are briefly outlined. ThePHS direction is chosen on the basis of additional structural information. The inferred results are in satisfactory agreement with those expected from field geology, and a tentative attempt to a unitary explanation of the origin of the fracture field is made upon this basis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875131
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 145
    Electronic Resource
    Electronic Resource
    On the significance of multipole axes (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 23-24 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The force experienced by a multipole when placed in an external magnetic field (which may be the field of another multipole) is formulated in terms of its dependence on the axes of the multipole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875182
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 146
    Electronic Resource
    Electronic Resource
    The effect of the number of charges carried by the argon ion on the darkening of ilford Q2 emulsion as ion detectors in mass-spectrometer (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 78-82 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The darkening (S) of Illford Q2 photographic plates as ion detectors in mass spectrometer has been investigated. The dependence of the darkening (S) on the ion density (n=ions/mm2) i.e.S=S(n)E for constant energy (E)=z U ranging from 4≦U≦20 Kv of the impinging40A+1-,40A+2- and40A+3-ions whenS does not exceed the value 0.15 and the second relationn=n(z U) S for darkening 0.05≦S≦0.15 constructed from the above relationS=S(n) E has been determined. The darkening was found to increase with increasing ion-density which inturn decreases with the ionenergy. For40A+1-,40A+2-, and40A+3-ion of equal energy and ion-density the darkening effect was independent of the number of the charges carried by the argon ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875188
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 147
    Electronic Resource
    Electronic Resource
    Studies on vertical total-beta-activity profiles of fission products in the accumulation area of the Stubacher Sonnblickkees (Hohe Tauern, Salzburg, Austria) (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 83-91 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung In den Jahren 1965 und 1966 wurden im Akkumulationsgebiet des Stubacher Sonnblickkees, (Hohe Tauern, Salzburg) aus Schneeschächten kontinuierliche Probenserien entnommen, welche die Akkumulation des laufenden hydrologischen Jahres erfassen. Die Proben wurden auf Gesamt-Beta-Aktivität untersucht, um die Veränderung der Vertikalverteilung der Spaltprodukte durch sommerliche Abschmelzvorgänge zu studieren. Als Ergebnis zeigt sich eine Spaltproduktanreicherung der Schicht unter dem Spätsommerhorizont, wobei jedoch die geringe Aktivität der darunterliegenden Winterschicht durch Einsickern von Schmelzwasser aus der darüberliegenden stark mit Spaltprodukten angereicherten Schicht kaum beeinflußt wird. Ein 11.75 m tiefer Firnschacht umfaßt die Jahresrücklagen von 1961/60 bis 1965/66. Als hervorstechendstes Merkmal der Vertikalverteilung der Gesamt-Beta-Aktivität ergibt sich ein Maximum an den zusammenfallenden Spätsommerhorizonten 1962 und 1963. Dieses Aktivitätsmaximum zeigt, daß in Haushaltsjahren mit starkem Fallout und starker Abschmelzung eine beachtliche Anreicherung sowie ein gutes Retentionsvermögen der verbleibenden Schicht für Spaltprodukte auftreten. Dieses charakteristische Aktivitätsmerkmal kann auch auf benachbarten Gletschern im Gebiet der Mittleren Hohen Tauern erwartet werden. Zufolge der guten Stabilität dieses Merkmals ist es für künftige Datierungszwecke besonders interessant. Weiters weist die Periode von 1961/62 bis 1963/64 hohe Spaltproduktaktivitäten im Gegensatz zur Periode 1964/65 bis 1965/66 auf. Dieses Ergebnis stimmt auch mit dem Verlauf der Luft-und Niederschlagsaktivität in den entsprechenden Jahren überein. Die charakteristische Abnahme der Gesamt-Beta-Aktivität des Firns über dem Spätsommerhorizont 1964 kann ebenfalls für Datierungszwecke verwendet werden.
    Notes: Summary In the years of 1965 and 1966 continuous vertical sets of samples were bored from pits comprising the uppermost perannual snowcover in the accumulation area of the Stubacher Sonnblickkees (Hohe Tauern, Salzburg, Austria). The total-beta-activity of the samples was measured in order to study the changes of the vertical distribution of fission products by summerly melting processes. An enrichment of fission products was found in the layer under the late, summer horizon. However, the weak activity of the layer underneath accumulated during the winter period is hardly influenced by meltwater percolation from the superimposed layer with high activity. An 11.75 m deep firn pit covers, the annual layers of net accumulation from 1960/61 to 1965/66. The most remarkable activity variation of the entire total-beta-activity profile of this pit is a maximum at the coinciding late summer horizons of 1962 and 63. This activity maximum proves that mass budget years with heavy fission product debris and high melting conditions cause a strong enrichment and high retention of the remaining layer for fission products. It can be assumed that this characteristic feature of the vertical activity distribution will be also found on neighboring glaciers in the region of the Mittlere Hohe Tauern. Because its relatively long time stability it is especially interesting for future dating purposes. Moreover, it was found that the period from 1961/62 to 1963/64 shows a high fission product activity in contrast to the low radioactive period from 1964/65 to 1965/66. This behavior of the firn activity is in agreement with the one of the air and the precipitation during these years. The characteristic changes of the total-beta-activity of the firn at the late summer horizon of 1964 can be also used for dating purposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875189
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 148
    Electronic Resource
    Electronic Resource
    Gravity effect of a homogeneous hemisphere (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 5-18 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Finite expressions for the gravity effect of a homogeneous hemisphere are given, considering the two cases when the hemispherical surface is convex upward and downward, the base plane being horizontal. Sets of theoretical gravity profiles and other graphs are also given: they may be used for the quantitative interpretation of Bouguer residual gravity anomalies which may be taken as due to hemispherical geological bodies. The results of an investigation on the convergence of the series expansion used for the evaluation of the Heuman's Lambda Function are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875037
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 149
    Electronic Resource
    Electronic Resource
    Surface waves in an elastic semi-space with a stable nonhomogeneity (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 31-41 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary Surface waves in an isotropic nonhomogeneous elastic semi-space (plane strain) are studied. It is assumed that the Poisson's ratio and the density of the medium are constant but shear modulus is a monotonic function of the depth. Use of the stress equation of motion is made to reduce the problem to an eigenvalue problem for a differential equation of fourth order with polynomial coefficients. A series solution of the problem is obtained and dependence of the Rayleigh velocityC R on the wavelength and the nonhomogeneity of the medium, is studied. Group velocity period curves are also obtained.
    Notes: Zusammenfassung Oberflächenwellen in einem isotropen Nicht-homogenen elastischen Halbraum (Für den ebenen Verzerungszustand) werden untersucht. Die Poissonsche Querzahl und die Dichte werden als konstant vorausgesetzt während der Schubmodul ein monotone Funktion der Tiefe ist. Unter Benutzung der Spannungstensorsbewegungsgleichungen reduziert sich das problem zu einem Eigenwertproblem einer Differentialgleichung der vierten Ordnung mit Polynomkoeffizienten. Eine Reihenentwicklung wird als Lösung des problems erhalten und die Abhängigkeit der RayleighgeschwindigkeitC R von der Wellenlänge und die Nicht-homogeneität des mediums werden untersucht. Ausserdem werden Gruppengeschwindigkeit und Perioden kurven erhalten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875039
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 150
    Electronic Resource
    Electronic Resource
    On the disturbances in a viscoelastic medium due to blast inside a spherical cavity (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 93-97 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In this paper we have considered the disturbances in a viscoelastic medium due to a blast of intensityP and durationT sec inside a spherical cavity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875046
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 151
    Electronic Resource
    Electronic Resource
    The focal mechanisms in Iran and their relations to tectonics (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 76-87 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Data from focal mechanism solutions obtained by different authors and those of 8 fault-plane solutions found in this study have been used to search for the distribution of the main stress axes in Iran. For this purpose, the area has been divided into three regions as southern, central and northern Iran. The results indicate that the characteristics of the motion at the foci are different in each of the three regions. — By examining the B axes in south Iranian earthquakes, direction of tectonic motion has been obtained as N 66°E. Since the maximum and intermediate stress axes are nearly horizontal, it is concluded that focal movements in this region are of reverse fault type. Thus, there is a similarity between recent crustal movements and those occurring during Alpine orogeny which is in the form of an overthrusting to the southwest. — In central Iran earthquakes however, tension is predominant, and, therefore, in this region faultings are dip-slip normal or strike-slip, and the horizontal components of displacements are dextral. The mean direction of maximum tension axes is nearly perpendicular to the central Iranian complexes. — It is deduced from north Iranian shocks that, in this region, the earthquakes studied are of nearly almost pressural type, and horizontal components of the oblique displacements in foci are sinistral.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875044
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 152
    Electronic Resource
    Electronic Resource
    An application of isallo stress analysis to areas in Tanzania, Texas and Alaska (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 102-116 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary This paper is a further one in the series presenting applications of isallo stress analysis to the investigations of the tectonic stresses in various areas of the world. Specific areas in Tanzania (near the East African Rift Valley), in Texas and in Alaska are investigated and a discussion of the tectonic stresses prevalent therein is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875048
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 153
    Electronic Resource
    Electronic Resource
    Ergebnisse komplexer Testversuche an Kiruna-Eisenerzen (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 140-146 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In order to gain an insight into the effects of natural influences in iron-ore fields, complex studies were made including lattice distorsions, the magnetic behaviour and electrical conductivity, elastic data and the stress-strain state. That all together was tested on iron-ores from Kirunavaara (Sweden).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875051
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 154
    Electronic Resource
    Electronic Resource
    Seasonal variations of the virtual height of sporadicE(h' Es) at middle latitudes and its possible origin (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 167-174 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Eine jahreszeitliche Änderung der scheinbaren Höhe der sporadischenE Schicht (h' E s) konnte festgestellt werden, die ein Maximum im Frühling und ein Minimum im Herbst zeigt. Diese Änderung vonh' E s ist der Änderung des totalen Ozonbetrages ähnlich. Andererseits kann man die jahreszeitliche Änderung der untersten sporadischenE Schicht (Typl) mit der Höhenänderung der Grenzfläche zwischen Homosphäre und Heterosphäre identifizieren. Es kann auch angenommen werden, dass die letztere durch die Expansion der Homosphäre hervorgerufen wird. Da ozon bekanntlich die Sonnenstrahlung sehr stark absorbiert, wird die jahreszeitliche Änderung vonh′ E s auf die vom totalen Ozonbetrag abhängigen Expansion der Homosphäre zurückgeführt.
    Notes: Summary A yearly variation of the virtual height of sporadicE, reaching a maximum in the spring and a minimum in the autumn, has been recently found. This variation ofh' E s is similar to the seasonal variation of the total amount of ozone. On the other hand, the seasonal variation of the virtual height of the lowest occurring sporadicE layer (l-type may be identified with the height variation of the boundary between homosphere and heterosphere. It may also be supposed that the latter is caused by the varying expansion of the homosphere. Since ozone strongly absorbs solar energy, the seasonal variation ofh' E s is attributed to the expansion of the homosphere depending on the total amount of ozone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875054
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 155
    Electronic Resource
    Electronic Resource
    Propagation transhorizon au-dessus de la Méditerrannee Sud-Orientale (Mer de Libye) (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 175-184 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Sommaire Une étude radiométéorologique en mer close, a été initiée par le Groupe Radiométéorologique de l'OTAN. Pour completer les resultats des mesures au dessus du Canal d'Otranto (Martina Franca-Corfou) publiées en collaboration avec le Groupe Italien du Service de l'Aeronautique Militaire, des mesures au dessus de la mer de Libye sur la partie SE de la Mediterranée, d'une liaison transhorizon de 725 km entre le Caire et la ville d'Ierapetra, ont été enterprises. Pour expliquer le mecanisme de cette propagation transhorizon, on a appliqué une méthode d'analyse, basée sur les courbes de distribution du champs reçue en fonction du pourcentage du temps, indiquée par l'un des auteurs (Anastassiadis). Les courbes de distribution Rayleigh ou SuperRayleigh, obtenues pendant la période chaude, indiquent un mécanisme de reflection diffusée, tandis que les courbes avec des pentes superieures d'une Rayleigh pure, pendant la periode froide indiquent un mécanisme de guidage. L'hypothèse ci-dessus est supportée par le fait que les variations en altitudes des surfaces isobares suivant les periodes chaudes ou froides, presentent un fort coefficient de correlation avec les intensités du champ reçu.
    Notes: Summary A radiometeorological study of VHF propagation along transhorizon paths over several parts of the Mediterranean sea, was initiated by the Radiometeorological Panel of NATO's Science Committee. After a study over the Otranto channel (Martina Franca-Corfu) performed in collaboration with the Italian group, in the present paper is investigated the 725 km, mainly over the Lybean sea transhorizon path Cairo City to lerapetra, located in the South cost of Creta island. Three years fieldstrengths measurements were analysed in Ierapetra center. Following the observed results, during the warm period of the year it is a good reception, while during the cold period the reception was very poor or inexistant. In order to explain the mechanism of this transhorizon propagation, a method of analysis based on the distribution curves, as indicated by one of the authors (Anastassiadis) was used. Rayleigh or super-Rayleigh distribution curves of the received signalstrength versus time percentage observed during the warm period indicate a diffused reflection mechanism while Sub-Rayleigh distribution observed during the cold period indicate a ducting mechanism. These results are supported by the close correlation observed between the variation in altitudes of isobaric surfaces and the location of volume following the warm or cold period of the year in which the diffused reflection mechanism is produced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875055
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 156
    Electronic Resource
    Electronic Resource
    Die Steuerung des vertikalen Austauschkoeffizienten durch die Temperaturstruktur in der unteren Troposphäre (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 38-60 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The vertical-mass-exchange coefficient was determined from aerosol measurements by two independent methods; the measurements were kept up for a considerable period of time. Thus, well-substantiated relationships between the exchange coefficient on the one hand and meteorological parameters — especially the lapse rate — on the other were found to exist in the lower troposphere between 700 and 1800 m. The first of the two methods is based on measurements of RaB concentration in air at 700, 1800 and 3000 m, the second on recordings of soundings of overall air conductivity between 700 and 1800 m a.s.l. In the first case, mean exchange coefficients were computed from RaB concentration gradients given as averages from RaB measurements at the above-specified levels; in the second, the air conductivity data were used to compute particle concentration profiles, from which incremental exchange coefficients can be computed for thin-layer increments. The latter may be made as thin as is consistent with the vertical resolution of the soundings. The major results obtained were the following: a) The mean exchange coefficient for the 700–1800 and the 1800–3000 m layer is found to be a function of the average temperature lapse rate in the respective layer; this relationship is subject only to some slight statistic alscatter, and is affected in some measure by air-mass changes, wind shear and heat of condensation. b) The mean exchange coefficient is a function of the stability energy of the layer concerned, subject to the influences listed in a). c) The exchange coefficient of an inversion layer is a function of the greatest inverse lapse rate existing in any part of the inversion. d) Vertical mass exchange in or through a layer of any thickness is primarily determined by the lowest incremental mass-exchange coefficient of any thinner layer contained therein. — The study is supplemented by results of fine-structure analyses of discontinuity layers and their surroundings.
    Notes: Zusammenfassung Zwei unabhängige Verfahren zur direkten Bestimmung des vertikalen Austauschkoeffizienten auf dem Wege über Aerosolmessungen werden über lange Zeiträume hinweg angewandt um gesicherte Beziehungen zwischen Austauschkoeffizient und meteorologischen Zustandsgrössen, vorallem des vertikalen Temperaturgrdienten, in der unteren Troposphäre zwischen 700 und 3000 m NN abzuleiten. Das eine Verfahren beruht auf der Messung der RaB-Konzentration in der Luft in 700, 1800 und 3000 m NN, das andere in der aerologischen Registrierung der totalen Luftleitfähigkeit zwischen 700 und 1800 m. Im ersten Falle können aus den mittleren Konzentrations gradienten die mittleren Austauschkoeffizienten direkt berechnet werden, im zweiten werden die Luftleitfähigkeitswerte zunächst in Partikelkonzentrationen umgerechnet. Diese gestatten die Be rechnung von differentiellen Austauschkoeffizienten über beliebig kleine Höhenintervalle. Die wichtigsten Ergebnisse sind: a) Der mittlere Austauschkoeffizient zwischen 700–800 und 1800–300 m lässt sich bei geringer statischer Streuung als Funktion des mittleren Temperaturgradienten in der jeweiligen Schicht angeben. Nebeneinflüsse: Luftkörperwechsel, Kondensationswärme, Windscherung. b) Der mittlere Austauschkoeffizient lässt sich als Funktion der Stabilitäenergie in der betrachteten Schicht darstellen, Nebeneinflüsse wie bei a). c) Der Austauschkoeffizient durch eine Inversionsschicht hindruch ist eine Funktion des grössten positiven Temperaturgradienten in der Inversion. d) Der vertikale Austausch durch eine beliebig dicke Schicht hindurch wird im wesentlichen durch den kleinsten differentiellen Austauschkoeffizienten innerhald dieser Schicht bestimmt. — Schliesslich werden Ergebnisse über Feinstrukturuntersuchungen im Bereich von Unstetigkeitsschichten mitgeteilt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876001
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 157
    Electronic Resource
    Electronic Resource
    A short term heat balance study on a coast range glacier (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 68-77 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Eine kurzzeitige Wärmebilanzstudie, die auf dem Lemon Glacier, Juneau Icefield, Alaska, durchgeführt wurde, wird beschrieben. Zu der Energie, die zum Schmelzen des Firns benötigt wird, trägt die Strahlungsbilanz 49%, der latente Wärmestrom 8% und der fühlbare Wärmestrom 43% bei. Die Strahlungsbilanz und die Summe der turbulenten Wärmeströme haben somit etwa die gleiche Grösse, ein Resultat, was schon in einer früheren Untersuchung auf einem alaskanischen Gletscher gefunden worden war. Das Verhältnis vom latenten zum fühlbaren Wärmestrom ist jedoch unterschiedlich.
    Notes: Summary A short term heat balance study made on the Lemon Glacier, Juneau Icefield, Alaska is described. Of the energy required to give the observed melting of the firn the net radiation over all wavelengths contributed 49%, the latent heat 8%, and the sensible heat a large 43%. The approximate equality between the net radiative component and the total eddy heat transfer is similar to the results of a previous determination on an Alaskan glacier in summer, though the latent and sensible heat proportions are different in each case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876003
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 158
    Electronic Resource
    Electronic Resource
    Investigation of the initial condensation stage of cloud formation in the chamber (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 78-88 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: анномачуuи в статБе описБьвается методика и приводятся резулБтатБь зкспериментов ио моделированию началБной конденсационной стадии формирования обначното спектр¶ в камере обБемом 3200 м3. Охнаждение возцуха в камере проводилосБ со скоростями, соответствуюшими скоростями восходяшего потокаu z ≈15–120 см/сек. Из измерений спектров ядер конденсации по пересБьщениям и измерений концентрацнн ядер формирющегося туманаN при задаииБьхu z оцененБь уеличинБьх пересБьщенийδ max , которБье не превБпбают. 10−3 бриu z ≈15 см/сек и 6·10−3 приu z ≈100 см/сек. ЭксперименталБно найденнБье значенияN δ max сравненБь с рассчитаннБьми. Дня расчетов испонБзованБь даннбье теории начанБной стадии конденсации в обнаках, учитБьвающей дтффузионнБьй рост капенБ (уравнепие Максвена). ЭкспэриментанБно понученнБье значэнияN иδ max оказалисБ волБшими, чем расчефнБье. НайненнБье зксперименталБно зависимостиN (u z ) иδ max (u z ) удовлетворитенБно аппроксимируются. степеннБьми функциями, однако, показатели степениu z оказанисБ болБшими, чем зто следует из издестнБьхтеоретпческих представлений
    Notes: Summary The experimental results on the initial condensation stage simulating droplet spectrum formation in the 3200 m3 volume chamber are presented. In the chamber the air was cooled at the velocities corresponding to those of the upstreamu z ≈15–120 cm/s. From the measurements of condensation nuclei-supersaturation spectra and the droplet concentrationN of the developing fog at givenu z maximum supersaturation valuesδ max , which do not exceed 1·10−3 atu z ≈15 cm/s and 6·10−3 atu z ≈100 cm/s, are estimated. The experimental valuesN andδ max are compared with the computed ones on the basis of regular condensation theory at the initial stage of cloud formation, when the droplet diffusion growth is considered. Experimental valuesN andδ max appeared to be greater than the computed ones. The experimentally obtained dependencesN (u z ) andδ max N (u z ) are approximated satisfactorily by degree functions, but exponents proved to be greater than it follows from the known theoretical presentations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876004
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 159
    Electronic Resource
    Electronic Resource
    On disturbances in a visco-elastic medium of Maxwell type in contact with a liquid medium and subjected to a magnetic field (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 87-91 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The problem of disturbances in a visco-elastic medium due to Maxwell in contact with a liquid medium — both being perfectly conductive — has been investigated when an impulsive force acts along the plane of the contact. The electro-magnetic equations of Maxwell, equation of elasticity and the stress-strain relations of the material have been used in the investigation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877840
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 160
    Electronic Resource
    Electronic Resource
    Thermal relaxation of magnetic domain misalignment in rocks (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 130-136 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The anisotropy of susceptibility which is induced in rocks and dispersed powdered magnetite by the application of a strong alternating field is removed by heating more rapidly than is thermoremanence in the same specimens. The anisotropy associated with thermoremanence induced in the earth's field is negligible, but in fields greater than 5 oersteds it becomes appreciable. It is concluded that the domain structure associated with low field thermoremanence is only a very slight perturbation of the zero field structure. However this is much less simple than has been supposed and involves two- or three-dimensional domain closure. An appropriate minor revision of the theory of multidomain thermoremanence is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877846
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 161
    Electronic Resource
    Electronic Resource
    Erratum (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 1-1 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875996
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 162
    Electronic Resource
    Electronic Resource
    Die anlagerungsgechwindigkeit der elektrisch geladenen und neutralen Emanationsfolgeprodukte an das atmosphärische Aerosol (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 175-188 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The velocities of attachment of neutral and charged radon-220 daughters to the natural atmospheric aerosol were measured. The half-lives of attachment $$\mathop T\limits^ - $$ a = 29 for positive and $$\mathop T\limits^ - $$ a 0 = 46 for neutral radon decay peoducts were found with an average aerosol concentration of 5·104 particles/cm3. It is also shown that about 40% of the atmospheric particles have radiiR≦10−6 cm and that these particles have only a small influence (2–4%) on the values of the half-lives of attachment; therefore, in this range of particle radii the number of the attached radioactive atoms can be neglected. Finally the percentage of the unattached222Rn and220Rn-decay products in the atmosphere was computed.
    Abstract: Résumé Les vitesses de l'agglomération des descendats neutres et électriquement chargés de220Rn atomes à l'aérosol atmosphérique sont mésurées. Les périodes de l'agglomération $$\mathop T\limits^ - $$ a = 29 pour les descendants positives et $$\mathop T\limits^ - $$ a 0 = 46 pour le neutres, étaient établis à une concentration d'aérosol moyenne de 5·104 particules/cm3. De plus on pouvait montrer, que jusqu'à 40% des particules de l'aérosol atmosphérique ont un rayonR≦10−6cm et que cette part des particules n'a que une petite influence sur la valeur des périodes d'agglomération (2–4%), c'est-à-dire que le nombre des descendants agglomérés à cet domaine des rayons est négligeable. Finalement le pourcentage des particules non-agglomérés a eté calculé au moyen des paramètres de l'agglomération mésurées.
    Notes: Zusammenfassung Die Anlagerungsgeschwindigkeiten der elektrisch geladenen und neutralen212Pb (ThB)-Atome an das atmosphärische Aerosol wurden experimentell bestimmt. Bei einer mittleren Aerosolkonzentration von 5·104 Teilchen/cm3 wurden die Anlagerungshalbwertszeiten $$\mathop T\limits^ - $$ a = 29 für positive und $$\mathop T\limits^ - $$ a 0 = 46 für neutrale Radon-Folgeprodukte erhalten. Ausserdem konnte gezeigt werden, dass bis zu 40% der Teilchen des atmosphärischen Aerosols dem RadienbereichR≦10−6cm angehören, und dass dieser Teilchenanteil die Grösse der Anlagerungshalbwertszeiten nur geringfügig (2–4%) beeinflusst, d.h. der Anteil der angelagerten Radionuklide ist in diesem Teilchenradienbereich vernachlässigbar. Zum Schluss wurde mit Hilfe der gemessenen Anlagerungskonstanten der prozentuale Anteil der unangelagerten222Rn- und220Rn-Folgeprodukte in der Atmosphäre berechnet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876012
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 163
    Electronic Resource
    Electronic Resource
    Spontane Bildung negativer Raumladungen in einem maritimpolaren Luftkörper mit hoher Aerosolkonzentration (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 27-37 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung In einem maritim-tropischen Luftkörper wurde während mehrerer Tage beobachtet, dass sich in 50–200 m über dem Boden spontan negative Raumladungen ausbilden, wenn kalte Hangabwinde in die bodennahe Luftschicht eindringen und sich mit der vorher vorhanden gewesenen erwärmten Luft turbulent vermischen. Der «luftelektrisch aktivierbare» Luftkörper zeichnete sich durch extrem hohe Aerosolkonzentration aus. Das Partikelspektrum war in Richtung auf grobe Aerosolkomponenten verschoben.
    Notes: Summary Spontaneous formation of negative space charges 50–200 m above the ground has been observed for several consecutive days in a warm maritime (mT) air mass penetrated by cold mountain-slope winds; the cold air underwent turbulent mixing with the pre-existing warm air. The ‘electrifiable’ airspace was characterized by an extremely high aerosol concentration, with the size distribution spectrum shifted from the normal toward a significantly increased incidence of coarse particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876000
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 164
    Electronic Resource
    Electronic Resource
    The plasma-like properties of an aerosol of consensation nuclei (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 89-100 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary An aerosol in charge equilibrium is theoretically and numerically investigated for plasma-like behaviour. It is shown that in sufficiently large containers the common type aerosols should manifest the properties of a plasma as regards their behaviour in an electric field. Such aerosols do not unambiguously possess a plasma frequency nor can they be termed a magnetoplasma. The results of this investigation may help to understand certain phenomena in atmospheric electricity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876005
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 165
    Electronic Resource
    Electronic Resource
    On the maintenance of the atmosphere's kinetic energy over the Northern Hemisphere in winter (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 104-121 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A quantitative study of the balance requirements of the atmosphere's kinetic energy during normal winter conditions is made for the whole Northern Hemisphere and separately for the tropics (0–30°N) and the extratropics (30–90°N) by using different sources of data. The most important new finding is a demonstration of the existence (on the isobaric surfaces) of meridional eddy flux of potential energy; this flux approximately counterbalances the meridional flux of kinetic energy. One of the conclusions reached is that maintenance of the large-scale eddies in the tropics is mainly due to forcing by extratropical eddies. This forcing occurs at 30°N as a southward eddy flux of potential energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876007
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 166
    Electronic Resource
    Electronic Resource
    Stresses produced by a load moving over the rough boundary of a semi-infinite transversely isotropic solid (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 45-50 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Stresses produced due to a moving load over the plane surface (supposed to be rough) of a semi-infinite transversely isotropic medium have been calculated in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875691
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 167
    Electronic Resource
    Electronic Resource
    On mapping an irregular boundary by means of reflected-wave measurements (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 13-16 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A method, using seismic data, is presented for the mapping of the irregular boundary of an elastic half-space. It furnishes the shape of the corrugations in terms of the measured displacement field generated by plane dilatational or shear waves reflected from the boundary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875687
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 168
    Electronic Resource
    Electronic Resource
    Some applications of the linear programming within gravimetry (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 5-12 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The paper presents some mathematic patterns by using the linear programming. These patterns are making up a simple method of gravimetric data transformation, solvable with the help of digital computers. Some methods of differentiating the regional and local anomalies, of effectuating the calculus of some gravity derivatives and of establishing the shape of bidimensional bodies, are shown. This work was aimed to enlarge the field of the linear programming appliableness within geophysics. Former studies on the scope were undertaken byShalaev [7]3), [8], as well as byDougerty andSmith [3].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875686
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 169
    Electronic Resource
    Electronic Resource
    Dispersion of waves in a continuously stratified elastic medium (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 17-21 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary It is shown that the waves travelling at normal incidence in a continuously stratified elastic medium in which the longitudinal and the transverse wave velocities increase linearly are appreciably dispersed. Dispersion curves are given showing the variation of phase and group velocities, with frequency and different laws of increase in density. The results are relevant to seismology and underwater acoustics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875688
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 170
    Electronic Resource
    Electronic Resource
    On the propagation of spherical waves due to large underground explosion (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 22-34 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary When a high explosive pressure acts on the boundary of a spherical cavity in an elastic medium, the material in a region around the charge behaves plastically and thereafter an elastic wave is propagated. Not only that but the elastic plastic boundary moves also with a certain velocity which is less than the elastic wave velocitySabodash [3]2). In this paper, firstly the case when the elastic plastic boundary moves with a velocityV 0. (V 0〈c) has been dealth with. The pressure in the elastic medium on this boundary has been assumed to be constant and equal toP 0. Secondly the case when the elastic plastic boundary moves with an exponentially decaying velocity has been considered. The pressure in the elastic medium on this boundary has also been assumed to be of exponential character.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875689
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 171
    Electronic Resource
    Electronic Resource
    On the buried source in a viscoelastic halfspace (1969)
    Springer
    Pure and applied geophysics 72 (1969), S. 51-60 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Die Störung erzeugt durch eine verborgene Quellenlinie in einem homogenen elastischem isotropen Halbraum mit innerer Reibung wird untersucht mit Hilfe einer Fourier Transformation. Die Verschiebung der freien Oberfläche des Halbraumes ist berechnet unter Verwendung der Sattelpunktsannäherung.
    Notes: Summary The disturbance due to a buried line source in an homogeneous anelastic halfspace with internal friction is investigated using Fourier transform technique. The displacement of the free surface of the halfspace is calculated by the application of the multiple saddle point approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875692
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 172
    Electronic Resource
    Electronic Resource
    Les glandes tégumentaires des staphylins termitophiles (1969)
    Springer
    Insectes sociaux 16 (1969), S. 1-26 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224459
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 173
    Electronic Resource
    Electronic Resource
    Orientierung vonLasius fuliginosus Latr. an einer Gabelung der Geruchsspur (1969)
    Springer
    Insectes sociaux 16 (1969), S. 55-60 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Laboratory experiments showed that the number of ants hunting for food is divided on a fork of the odorous trail in proportion to the amount of trail pheromone deposited on the two branches of the fork. The same principle may also work in the field although it seems to be dominated by visual orientation.
    Notes: Zusammenfassung Das Aufspaltungsverhältnis der futtersuchenden Arbeiterinnen vonLasius fuliginosus an einer Gabelung der Geruchsspur wird im Laborversuch durch das Mengenverhältnis der auf die zwei Schenkel aufgetragenen Spursubstanz bestimmt. Auch im Freiland kann dieses Prinzip wirksam sein, wird jedoch bei erfahrenen Arbeiterinnen offenbar durch optische Orientierung überlappt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224462
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 174
    Electronic Resource
    Electronic Resource
    The effect of the size of a honeybee colony on its foraging activity (1969)
    Springer
    Insectes sociaux 16 (1969), S. 73-77 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Une détérioration des conditions de butinage décourage relativement plus le butinage chez les fortes colonies que chez les petites.
    Notes: Summary Deterioration in foraging conditions discourages foraging relatively more from large than from small colonies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224465
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 175
    Electronic Resource
    Electronic Resource
    Ire conférence européenne de Myrmécologie (1969)
    Springer
    Insectes sociaux 16 (1969), S. 313-316 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02309001
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 176
    Electronic Resource
    Electronic Resource
    On the propagation of certain types of surface waves in a non-homogeneous elastic layer (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 93-98 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The propagation of a certain type of surface waves in a non-homogeneous elastic layer of finite thickness lying in welded contact with a semi-infinite homogeneous elastic medium has been investigated in this paper. The surface wave is characterised by the fact that the dilatation Δ and the vertical displacement component ω are both zero. It has been proved that such disturbance can propagate only when the phase velocity of the wave is greater than the shear wave velocity and the group velocity is inversely proportional to the phase velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875127
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 177
    Electronic Resource
    Electronic Resource
    Pn residuals and station corrections (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 129-133 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary This paper is an attempt towards determination of station adjustments for Shillong and Delly Observatories from considerations of a large number ofP n residuals. Station adjustments toJeffreys-Bullen travel time tables for Shillong comes to about 4 seconds and for Delhi 2 seconds respectively for Δ≧20°.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875130
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 178
    Electronic Resource
    Electronic Resource
    Book reviews (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 152-152 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875133
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 179
    Electronic Resource
    Electronic Resource
    A matrix method for heat conduction in multi-layered media (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 143-151 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A matrix formalism is developed to facilitate computation of temperature distribution in the steady state in the interior of a multi-layered earth. The idealized model consists of homogeneous and isotropic layers of constant (but arbitrary) values of heat production as well as thermal conductivities. The known surface data is continued by this method to define the thermal structure at any desired point of the interior for planar and spherical stratification. Extension of the problem to the unsteady flow conditions has been presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875132
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 180
    Electronic Resource
    Electronic Resource
    Changes in geomagnetic multipole parameters 1942.5–1962.5 (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 16-22 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary From a smooth series of spherical harmonic coefficients for the geomagnetic potential, the corresponding multipole parameters have been calculated for five epochs from 1942.5 until 1962.5, at five year intervals. Changes in multipole parameters are discussed in relation to the secular variation field and to theSchmidt eccentric dipole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875181
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 181
    Electronic Resource
    Electronic Resource
    On the propagation of acoustic gravity waves over a spherical earth (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 35-44 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Acoustic gravity waves, propagating over a spherical earth with an isothermal and windless atmosphere, are considered. The perturbed pressure is expressed as a sum of discrete modes which are shown to be orthogonal. It is found that the excitation for the modes is determined by the specified normal particle velocity over a conical surface enclosing the source. One of the modes excited is shown to have characteristics closely akin to a Lamb wave on a flat earth for an isothermal atmosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875185
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 182
    Electronic Resource
    Electronic Resource
    On the earth structure in some regions of the USSR from surface waves data (1969)
    Springer
    Pure and applied geophysics 73 (1969), S. 99-119 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Реуме Рассмотрено применение метода фазовьх скоростей для оценки строения земной корь Русской блатформьи и в Средней Азии. При опреденелии фазовьих скоростей использовань способьь спектрального анализа и ручной корреляции. Ифользованьь наблюдения вдоль профиней и на треугоньликах сейсмических сталций. Метод групповой скорости применялся для изучеля земной корьь на Дальнем Востоае, а так же ла отденьнььх сеьсмческих сгалциях в различлььх азимутах.
    Notes: Summary The phase velocity method has been applied for estimation of the crust structure o the Russian platform and Middle Asia. By the determination of phase velocities spectral and peak-and-trough visual methods have been used. The surface waves observations have been interpreted along the profiles and triangles of seismic stations. Group velocity method has been applied for crust investigations in the Far East regions and along different directions for isolated seismological stations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875128
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 183
    Electronic Resource
    Electronic Resource
    Noncyclic variation andS q harmonic dials (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 5-15 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A method is presented for the determination of noncyclic variation in geomagnetic hourly mean values, which employs only 24 hourly values or 12 bihourly values, etc. The manner in which the method bears on the ellipticity of distributions of points onS q harmonic dials is discussed. A review of other available methods is also included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875180
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 184
    Electronic Resource
    Electronic Resource
    A dipole approximating to the highest possible degree the earth's magnetic field (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 25-28 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The coordinates and the components of the dipole approximating to the highest possible degree the earth's magnetic field are determined minimizing a sum of squares of differences between the dipole field and the earth's magnetic field. Numerical results by the aid of a digital computer have been obtained for epoch 1932, 1937, 1942, 1945, 1950, 1955 and 1960 on the basis of magnetic data from 61 observatories.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875183
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 185
    Electronic Resource
    Electronic Resource
    Uber die Berechnung der Größenverteilung von den absorbierenden kugelförmigen Teilchen (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 92-104 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Ziel der vorliegenden Arbeit war, aus Extinktionsmessungen der absorbierenden Teilchen ein kalkulmäßiges Schema über ihre Größenverteilung zu gewinnen. Dies bedeutet mathematisch eine Integralgleichung erster Art, in der dievan de Hulstsche Formel für den Extinktionsquerschnitt als Kern dient, zu lösen. Es ist die exakte Lösung des behandelten Problems erhalten. Verwendung der gefundenen Umkehrformel wird durch eine konkrete Aufgabe erläutert. Um die experimentelle optische Information auszunutzen, soll man zu betrachtendes unkorrektes Problem regularisieren. Von dem früher erarbeiteten SchemaA kann man nur bei den absorptionsfreien Teilchen Gebrauch machen; somit erweist es sich nicht genügend genau. Die Mitberücksichtigung der Absorption liefert den exponential abklingenden Kern, deshalb ist die Verteilungsfunktion zu stark geglättet und das SchemaA versagt. Behandelt wird das SchemaB, dem die Approximation des tabelmäßigen Extinktionskoeffizients durch die rationale Funktion zugrundeliegt. Das SchemaB läßt sich bei der Regularisation für alle Absorpzionsindizes verwirklichen Das SchemaB ist an einem typischen Beispiel gründlich kennengelernt und seine Genauigkeit durch einige nummerische Auswertungen illustriert.
    Notes: Summary This article aims in getting a computation scheme enabling to determine the distribution function of absorbing particles by the measured coefficient of extinction. Mathematically, it comes to the solution of the first kind integral equation, the kernel of which is provided byVan de Hulst's formula for the cross section of extinction. An exact solution of the problem discussed is found. The application of the inversion formula is demonstrated with a given equation. A regularisation scheme for an incorrectly posed problem is needed in order to employ experimental information. The schemeA elaborated earlier for transparent particles proves to be nonapplicable in view of smoothing toc much the distribution function by the integral equation kernel. The schemeB is developed basing on approximating the tabula data by rational functions. The schemeB enables one to do regularisation at any values of absorbing coefficient. The application of the schemeB is in details inllustrated in a typical example, the numerical estimates of the scheme exactness being given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875190
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 186
    Electronic Resource
    Electronic Resource
    Ozone distribution over Mediterranean, central and southeast Europe during the International Quiet Sun Year (1964–1965) (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 165-185 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Ozone observations made during 1964 and 1965 at nine Mediterranean, central and southeast European stations (latitudes 38–52°N, longitudes 9–23°E) reveal patterns of seasonal and shorter time-variations in total ozone as well as in vertical ozone distribution. During the winter-spring season, a significant increase (∼20%) of ozone occurs essentially simultaneously with the spring stratospheric warming, and is noticed at all stations.—Autocorrelation coefficients show that the total ozone on any day is strongly related to the total ozone of the preceding four days in summer or one or two days in winter-spring or autumn. Changes of total ozone in southeast Europe correlate closely with those in Mediterranean Europe, and less closely with those from north central Europe.—Power spectrum analysis detects the dependence of ozone changes on processes with periods longer than 6–8 days, and indicates a significant oscillation with a period of 14–15 days, perhaps a result of the direct influence of lower stratospheric circumhemispheric circulation. — Reliable vertical ozone soundings were not available from all stations. The mean vertical profiles at Arosa, Switzerland (47°N) and Belsk, Poland (51°) are very similar. More than 60% of the variability of the total ozone is contributed by changes in ozone concentration between 10 and 24 km; less than 10% is due to variations above 33 km. Changes in ozone partial pressure at different altitudes, and relationships of those changes to total ozone, indicates that a mean vertical ozone distribution may be described adequately by considering the ozone changes in four layers: a) the troposphere, b) the lower stratosphere up to ∼24 km, c) a transition layer from ∼24 km to a variable upper border at 33–37 km, and d) the layer above 33–37 km.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875196
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 187
    Electronic Resource
    Electronic Resource
    New books (1969)
    Springer
    Pure and applied geophysics 74 (1969), S. 206-208 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875199
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 188
    Electronic Resource
    Electronic Resource
    On S. H. point source in heterogeneous medium (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 56-60 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A S.H. point source in heterogeneous elastic medium where the modulus of rigidity and density vary exponentially with depth has been considered. The form of disturbance due to such a point source in a semi-infinite medium has been obtained in integral form. The integrals are evaluated by contour integration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875042
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 189
    Electronic Resource
    Electronic Resource
    Radial vibration of a cylindrical shell having transverse isotropy (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 42-46 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Stresses and displacements in a transversely isotropic cylindrical shell when it vibrates radially under prescribed boundary loadings have been obtained with the help of finite Hankel transforms [1].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875040
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 190
    Electronic Resource
    Electronic Resource
    On the disturbances in a thin elastic circular plate resting on a viscoelastic foundation of Pasternak type (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 88-92 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In this paper disturbances due to impulsive as well as transient load in a thin elastic finite circular plate resting on viscoelastic foundation of Pasternak type have been considered separately.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875045
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 191
    Electronic Resource
    Electronic Resource
    The role of the tropopause in stratospheric-tropospheric exchange processes (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 185-218 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In a previous studyReiter andMahlman [37]3) have estimated the amount of stratospheric air intruding into the stable layer of the jet stream front in a case of cyclogenesis not accompanied by surface radioactive fallout. In the present report the same case is examined on a more general basis. Outflow from, as well as inflow into, the stratosphere is estimated over the entire thickness of the ‘tropopause gap’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875056
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 192
    Electronic Resource
    Electronic Resource
    A statistical study of pressure changes in the troposphere and lower stratosphere after strong solar flares (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 233-246 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The average change in height of several constant pressure levels in the troposphere and lower stratosphere after a strong solar flare is described. The analysis covers the northern hemisphere north of 10°N and is based on a sample of 81 carefully selected flares from the period July 1957 through December 1959. The statistical significance of the results is tested by drawing a comparison with the results obtained when one applies exactly the same analysis to three samples of 81 random key-dates selected from the same period. Properties of the reaction pattern are (1) it is pronounced at high as well as low latitudes, (2) it consists of alternating cells of positive and negative height change, (3) it is established within six hours after the flare, and (4) the maximum response occurs near the tropopause. It appears more likely that the atmospheric reaction pattern can be attributed to very energetic solar particles rather than to enhanced ultraviolet radiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875058
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 193
    Electronic Resource
    Electronic Resource
    On the energy content of the atmosphere (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 268-277 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Vertikalprofile des Gehalts an fühlbarer Wärme, potentieller Energie und latenter Wärme in der Atmosphäre zwischen 1000 and 100 mb werden für Januar und Juli und die Breitenkreise 0, 10, 20, 30, 40, 50, und 60°N abgeleitet. Gegensätze zwischen Land und See ändern sich mit geographischer Breite und Jahreszeit.
    Notes: Summary Vertical profiles of the content of sensible heat, potential energy, and latent heat in the atmosphere between 1000 and 100 mb, during January and July, are derived for the latitude circles 0, 10, 20, 30, 40, 50, and 60°N. Contrasts between oceans and continents are found to vary significantly with latitude and season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875061
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 194
    Electronic Resource
    Electronic Resource
    The tropopause over India (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 355-364 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The frequency of occurrence of the polar and tropical tropopause at different stations in India in different months is studied. The seasonal and latitudinal height variations of the tropical tropopause are examined. A break in the tropical tropopause just at the latitude of the easterly jet stream is suggested. The lower southern tropopause is called the monsoon tropopause. A few comments on the possible characteristics of the monsoon tropopause are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875065
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 195
    Electronic Resource
    Electronic Resource
    A complex variable technique for the stress field around an elliptic underground inhomogeneity (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 137-146 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The techniques of complex variables are used to obtain the solution for the two dimensional elastostatic problem of an elliptic inclusion, subject to an uniform stress field at infinity. It is required that the displacements are continuous and the stresses balance each other across the interface between the inclusion and the surrounding medium. The solution is general in that it can be used for any required shape of the ellipse representing the inclusion and for any arbitrary choice of the elastic parameters of the inclusion and the medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877847
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 196
    Electronic Resource
    Electronic Resource
    Compressional angles of isallo stress theory for a circular-cylindrical, spherical and elliptic-cylindrical elastic inhomogeneity in an elastic medium (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 147-152 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The compressional angle of isallo stress theory for the case of a cylindrical (circular and elliptic) and spherical subsurface inhomogeneity, assuming that the conjugate fracture surfaces are inclined at a Mohr angle of 30° toward the largest compression, has been calculated. The solution for a spherical and cylindrical inclusion in an infinite medium subject to a uniform stress field (at infinity) were taken as the basis for the stress analysis. The stress angle was then calculated for the mentioned types of inclusions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877848
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 197
    Electronic Resource
    Electronic Resource
    Ball lightning as a radiation bubble (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 247-262 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A model for ball lightning is presented and its properties discussed. The model is that of a microwave radiation field contained within a plasma dielectric sphere, resonant at a frequency much greater than the electron-molecule collision frequency. Calculations are made of the energy stored in the microwave field, the electron temperature, the rate of energy loss due to ionization, and the effects of recombination. It is concluded (a) that a self-consistent set of conditions can be obtained only when the neutral density within the sphere is much lower than atmospheric, and (b) that the microwave field strength required is of the order of 109V/m. Under these conditions the radiation pressure becomes comparable to that of the atmosphere; the second case investigated is when these two become equal. It is then found that this ‘radiation bubble’ appears to satisfy the requirements imposed on energy storage and dissipation, recombination and resonant frequency. The electron density in such a bubble is found to be typically 1011 cm−3 and the stored energy typically 103 Joules. A discussion is given of some of the problems associated with the model-formation, stability, neutral number density, and the problem of hydrostatic equilibrium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875059
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 198
    Electronic Resource
    Electronic Resource
    A preliminary prediction analysis of radiation fog (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 278-299 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The system of physical equations describing temperature changes near the ground in fog-free air as well as in radiation fog is solved numerically. The variation of the exchange coefficient with height is taken into account using different models while time variations are still disregarded. Temperature changes due to latent heat effects are incorporated in this study. Moreover, the presence of radiative flux divergence is included in an approximate manner. The solution of the problem is presented in terms of graphs showing the development of temperature and water droplet profiles as function of time and height. Computed liquid water content as well as temperature profiles are in general agreement with observations while the vertical growth of fog usually proceeds too rapidly. Concrete suggestions are given of how to improve the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875062
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 199
    Electronic Resource
    Electronic Resource
    Book reviews (1969)
    Springer
    Pure and applied geophysics 75 (1969), S. 375-376 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875067
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 200
    Electronic Resource
    Electronic Resource
    Deformation of a homogeneous gravitating sphere by internal dislocations (1969)
    Springer
    Pure and applied geophysics 76 (1969), S. 17-39 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary An explicit solution is obtained for the system of equations describing the spheroidal motion in a homogeneous, isotropic, gravitating, elastic medium possessing spherical symmetry. This solution is used to derive the Green's dyad for a homogeneous gravitating sphere. The Green's dyad is then employed to obtain the displacement field induced by tangential and tensile dislocations of arbitrary orientation and depth within the sphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877834
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...