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  • 42.80
  • sediments
  • Springer  (23)
  • American Chemical Society
  • Annual Reviews
  • Blackwell Publishing Ltd
  • 2005-2009
  • 1980-1984  (23)
  • 1983  (23)
Sammlung
Schlagwörter
Verlag/Herausgeber
  • Springer  (23)
  • American Chemical Society
  • Annual Reviews
  • Blackwell Publishing Ltd
Erscheinungszeitraum
  • 2005-2009
  • 1980-1984  (23)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Theory of synchronously pumped dye lasers (1983)
    Springer
    Applied physics 30 (1983), S. 135-142 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract An analysis of cw synchronously pumped dye lasers is presented. Under the assumption that the cavity (tuning element) bandwidth is much wider than the bandwidth of the transform limited pulses generated, the pulse forming dynamics is rigorously treated. It is shown that for a finite mismatch between the lengths of the dye and the pump lasers, a steady-state pulse develops in the dye laser cavity with a conserved pulseshape. The characteristics (energy, shape, peak power, duration) of these pulses of ultimate width are quantitatively determined as a function of cavity mismatch. An analytical solution for the pulse envelope is determined, which yieldsI(t)∝Sech2(t/t p ) to a good approximation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695468
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  • 2
    Digitale Medien
    Digitale Medien
    Color signal correlation detection by matched spatial filtering (1983)
    Springer
    Applied physics 32 (1983), S. 1-6 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.30 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A polychromatic correlation detection technique by complex spatial filtering is presented. This technique utilizes a diffraction grating and three co-lineared (red, green, and blue) coherent sources. The technique of complex spatial filter synthesis for the polychromatic corelation detection is demonstrated. This technique offers true color correlation detection which is very suitable for color signal recognition and identification. The correlation diffraction efficiency with this technique is generally higher than that of the wavelength-multiplexed technique. Several interesting experimental demonstrations of this color signal correlation detection scheme are provided. Finally we note that this color signal detection technique is a simple and versatile processing technique which has broad range of applications of complex color signal detection, recognition and identification.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688766
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  • 3
    Digitale Medien
    Digitale Medien
    Waveform of the amplitude modulated laser light by means of a mechanical chopper (1983)
    Springer
    Applied physics 32 (1983), S. 119-122 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The model which reproduces accurately and conveniently the waveform of the amplitude modulated cw laser light in the TEM00 mode by a mechanical chopper is developed. It is found that its predictions are in good agreement with the strict, completely accurate but rather lengthy and inconvenient treatment and with the experiment. The criterion for the efficient amplitude modulation of the laser light by a mechanical chopper is formulated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688816
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  • 4
    Digitale Medien
    Digitale Medien
    Bistable operation of a dual-wavelength synchronously mode-locked cw dye laser (1983)
    Springer
    Applied physics 32 (1983), S. 7-8 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Bistable operation of a dual-wavelength synchronously mode-locked cw dye laser is reported. Wavelength switching is found to depend on the pump power and the dye laser cavity lengths.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688767
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  • 5
    Digitale Medien
    Digitale Medien
    Differential amplitude contrast imaging in the scanning optical microscope (1983)
    Springer
    Applied physics 32 (1983), S. 187-191 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A split detector is used in a scanning optical microscope to produce high-quality differential amplitude contrast images. A slight lateral offset in the detector position is shown to introduce information about object height variations to the image. These results are compared with images obtained by electrical differentiation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688286
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  • 6
    Digitale Medien
    Digitale Medien
    Coherence requirement for partially coherent correlation detection (1983)
    Springer
    Applied physics 30 (1983), S. 23-27 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The coherence requirement for correlation detection is determined using the theory of partially coherent light. It is shown that the requirement for temporal coherence strongly dependes on the spatial frequency and the spatial extension of the target (i.e., space bandwidth product). However, the spatial coherence requirement depends only on the extension of the target. Some numerical results are also presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692654
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  • 7
    Digitale Medien
    Digitale Medien
    Resonant upconversion of λ=1.06 μm radiation in rubidium vapors (1983)
    Springer
    Applied physics 30 (1983), S. 157-159 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The experimental results on upconversion of λ=1.06 μm radiation to the near ultraviolet in rubidium vapors providing 12% photon efficiency are reported under twophoton resonance of the concerted and pump sum frequency.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695472
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  • 8
    Digitale Medien
    Digitale Medien
    Ambartsumian's principle of invariance and the reflection of radio waves from plane inhomogeneous slabs (1983)
    Springer
    Applied physics 30 (1983), S. 183-188 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 41 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Using Ambartsumian's principle of invariance we investigate for radio waves the reflection coefficient of a plane inhomogeneous slab. We find that the reflection coefficient, as a function of slab thickness, satisfies the Riccati equation. From this equation we deduce a geometric theorem on the upper and lower bounds of the reflection coefficient. We illustrate the theorem by applying it to several special cases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688404
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  • 9
    Digitale Medien
    Digitale Medien
    Complete and reversible absorption of radiation (1983)
    Springer
    Applied physics 32 (1983), S. 153-156 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 44.40 ; 05.70 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Kirchhoff's law has caused confusion in the discussion about the theoretical maximum work from radiation because it permits only infinitesimal or irreversible absorption. With the aid of an optical circulator, non-Kirchhoff behaviour is possible in principle which permits at the same time complete and reversible radiation absorption. The key to overcome Kirchhoff's law seems to be the magnetic field, a condition explicitly excluded by Kirchhoff. The work extracted in complete reversible conversion of radiation is calculated. The irreversibilities connected with the emission process are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688821
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  • 10
    Digitale Medien
    Digitale Medien
    Effective upconversion of CO2-laser radiation in sodium vapors (1983)
    Springer
    Applied physics 30 (1983), S. 53-55 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The effective upconversion of CO2-laser radiation to the uv spectral range has been obtained in sodium vapors, the photon efficiency being 65%, the corresponding power efficiency being 2640%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692659
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  • 11
    Digitale Medien
    Digitale Medien
    Diffraction efficiencies of evanescent-wave holograms (1983)
    Springer
    Applied physics 30 (1983), S. 87-94 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.40 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In contrast to previous models diffraction efficiencies of evanescent-wave holograms are calculated within the framework of a slab model that takes into account the finite thickness of the recording medium. This modification leads to characteristic diffraction efficiency oscillations with respect to reconstruction angle and medium thickness as well. One obtains higher diffraction efficiency maxima and pseudo-optical tunnelling. The analysis covers TE-polarized fields.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688482
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  • 12
    Digitale Medien
    Digitale Medien
    Modulation of radiation in nonstationary resonant media (1983)
    Springer
    Applied physics 30 (1983), S. 41-45 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 42.10 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We study the propagation of radiation in a gas, the resonant frequency of which changes with time when affected by external electric and magnetic fields. It is shown that for an harmonic change of the resonant frequency under appreciable energy exchange between electromagnetic field and medium, deep amplitude modulation of radiation may be achieved. The analytical expressions obtained for a field in a gas allow rather accurate calculation of the space-time structure of the radiation penetrated through the medium layer. The numerical calculations are compared with the known experiment [4], good agreement is obtained. The transformation of radiation between dispersive branches with adiabatic stepwise variation of the resonant frequency has been also studied. Branch-tobranch transformation is investigated and the adiabatic invariant is found to be the total number of the high and low frequency radiation quanta corresponding to two dispersive branches.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692657
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  • 13
    Digitale Medien
    Digitale Medien
    Effects of a magnetic field on the optical properties of dielectric mirrors (1983)
    Springer
    Applied physics 32 (1983), S. 63-67 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.80 ; 78.20 ; 78.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract We have measured the changes in the polarization state of a monochromatic (λ=514.5 nm) light beam on reflection at normal incidence by a multilayer dielectric mirror placed in a time-modulated magnetic field. The dominant effect is a Faraday rotationΦ≃3.7×10−10 rad/G. The sensitivity (around 40Hz) obtained is $$ \simeq 6 \times 10^{ - 9} {\text{ rad/}}\sqrt {{\text{Hz}}} $$ which is dominated by the shot-noise limit (100 mW of light power).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00617830
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  • 14
    Digitale Medien
    Digitale Medien
    Refractive index profiles of LiNbO3: Ti waveguides (1983)
    Springer
    Applied physics 32 (1983), S. 125-127 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.80 ; 66.30 ; 85.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Eight LiNbO3: Ti waveguides have been fabricated under differing conditions. The effective refractive indices of guided modes have been measured and successfully fitted to Gaussian index profiles. The change of refractive index and titanium concentration are related by a power law, the exponents being different for the extraordinary and the ordinary beam.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00616607
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  • 15
    Digitale Medien
    Digitale Medien
    Optical properties determination at 10.6 μm of thin semiconducting layers (1983)
    Springer
    Applied physics 30 (1983), S. 23-26 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 07.60 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract An optical characterization of thin semiconducting multilayers in the infrared range, using a combination ofm-lines and reflection spectroscopy techniques is exposed. Such a method, non-destructive, allows to determine the thickness and the refractive index of each component of a multilayer multimodal planar waveguide.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00617709
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  • 16
    Digitale Medien
    Digitale Medien
    Measuring the Magnetooptic Kerr effect by diffraction (1983)
    Springer
    Applied physics 31 (1983), S. 59-63 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 78.20 L ; 42.80 ; 75.70
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract A method is presented to measure the Magnetooptic Kerr Effect (MOKE) by diffraction. This is accomplished by giving the magnetized surface a magnetization distribution which functions like a linear diffraction grating. It is shown that the first and higher orders of the light diffracted by such a grating are produced by MOKE whereas the zero order approximately represents the reflectivity of the surface (given by the Fresnel formulae assuming zero magnetization). The procedure used here to form a grating is restricted to thin soft magnetic films, and has been demonstrated on evaporated Fe-Ni films. It uses the magnetic field of a pulse-driven meandered stripe-conductor placed in close contact with the film in the presence of a homogeneous external magnetic field. Experimentally determined Kerr intensities were compared with those measured by ellipsometric methods. Good agreement was found in the case of films with uniaxial anisotropy. For films with no anisotropy, the relative dependence of Kerr intensity vs wavelength, polarisation and angle of incidence could be derived.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00616305
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  • 17
    Digitale Medien
    Digitale Medien
    Cladoceran remains as evidence of change in trophic state in three Swiss lakes (1983)
    Springer
    Hydrobiologia 103 (1983), S. 141-146 
    Details
    ISSN: 1573-5117
    Schlagwort(e): paleolimnology ; lakes ; sediments ; eutrophication ; Cladocera ; Switzerland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Species composition and density of cladoceran populations changed in Lakes Zürich, St. Mortiz and Baldegg as human populations increased in these watersheds. Lake Zürich sediments became annually laminated in the 1890's as a result of increased organic input as the size of the cities surrounding the lake grew. At the same time, the Bosmina species changed from a oligotrophic form (longispina) to a eutrophic form (longirostris). An increase in Daphnia spp. populations also occurred at this time in the lake's history. Bosmina longispina reappeared in the lake in 1965 as the lake's trophic status changed from eutrophic to mesotrophic due to effective sewage treatment facilities. Annual laminations appear in the Lake St. Moritz sediments about 1910. Shortly thereafter, a shift from B. longispina to B. longirostris occurred. This change in trophic status is associated with increased tourism in the area. Lake Baldegg sediments also show annual laminations beginning in 1885 and a similar shift in the Bosmina species. Other cladoceran remains were too scarce to be useful in interpreting the histories of these lakes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00028442
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  • 18
    Digitale Medien
    Digitale Medien
    Recent climatic changes recorded by the salinity of pore waters in the Dead Sea sediments (1983)
    Springer
    Hydrobiologia 103 (1983), S. 75-79 
    Details
    ISSN: 1573-5117
    Schlagwort(e): paleolimnology ; Dead Sea climate ; pore-waters ; diffusion ; sediments ; salinity ; porosity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The salinity of lakes is subject to variations imposed by climatic changes. These variations are recorded in the salinity profile of pore waters. Meromictic lakes, such as the Dead Sea, are a special case where waters which underlie the mixolimnion reflect salinity variations. In a sediment core from Dead Sea shallow waters, the salinity profile exhibited a minimum at about 1.9 m depth. It is shown by a diffusion model that this minimum can be attributed to lower salinities which prevailed at the sediment water interface for several decades around the turn of this century. No such minimum was observed in a sediment core from the deepest part of the lake where, during the last two centuries, the overlying brines had a constant salinity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00028431
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  • 19
    Digitale Medien
    Digitale Medien
    A new, flow-through corer for the quantitative sampling of surface sediments (1983)
    Springer
    Hydrobiologia 99 (1983), S. 75-79 
    Details
    ISSN: 1573-5117
    Schlagwort(e): macrofauna ; meiofauna ; sediments ; methods ; coring
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A new, flow-through benthic corer is described and compared to other commonly used coring methods. The new corer compares favorably with diver coring and is superior to coring with a ball-type, check valve corer, based on recovery of meiofauna, macrofauna, and particle bound hydrocarbons. Check valve corers yielded the most variable results. The new corer may be used to efficiently obtain samples of surface sediments from shallow (〈6 m) water, where a reasonably stable working platform is available.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00013719
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  • 20
    Digitale Medien
    Digitale Medien
    Microbiological examination of Lake Erie and Lake Ontario sediments (1983)
    Springer
    Hydrobiologia 98 (1983), S. 135-145 
    Details
    ISSN: 1573-5117
    Schlagwort(e): sediments ; Canadian Great Lakes ; bacteria ; distribution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Diver collected cores from three sites in Lake Erie, west of Cleveland, Eastern basin and near Buffalo, and one from Lake Ontario near the mouth of the Niagara River, were sectioned to 20 cm and examined for sulfur cycle and nitrogen cycle bacteria, heterotrophic bacteria, insoluble organic and inorganic phosphate solubilizing bacteria and manganese oxidizing bacteria. Eh, pH, nitrogen, organic carbon and percentage moisture determinations were also made. Data from this study support and confirm other microbiological data collected from Lower Great Lakes sediment and also support the hypothesis that microbial flora of similar type sediments are numerically similar irrespective of the sediments source within the Lower Great Lakes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02185631
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  • 21
    Digitale Medien
    Digitale Medien
    The relationship between fossil diatom assemblages and limnological conditions (1983)
    Springer
    Hydrobiologia 98 (1983), S. 223-235 
    Details
    ISSN: 1573-5117
    Schlagwort(e): diatoms ; paleolimnology ; lakes ; Minnesota ; sediments ; microfossils
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Fossil diatom assemblages from the sediment/water interface in 105 Minnesota lakes were compared with measurements of alkalinity, sulphate, total phosphorus, transparency, and water depth at the sample site. Similar assemblages were placed together using cluster analysis and comparisons of environmental variables between diatom clusters were made using an analysis of variance. Total alkalinity and transparency showed the greatest difference among clusters. Samples from shallow eutrophic prairie lakes were dominated by Melosira granulata, Stephanodiscus niagarae and, occasionally, by Stephanodiscus hantzschii. Deep oligotrophic lakes had modest percentages of Cyclotella comta. Dilute acid lakes were dominated either by Melosira distans and M. italica or by Tabellaria fenestrata, Cyclotella stelligera, and in some cases C. glomerata. Assemblages with Cyclotella glomerata and Synedra nana were found in naturally meromictic lakes. Stephanodiscus hantzschii showed a preference for extremely eutrophic lakes. The relationships between recently deposited diatom assemblages and the lake environmental conditions studied here can be used to evaluate the extent of past environmental change in lakes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00021023
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  • 22
    Digitale Medien
    Digitale Medien
    Gas chromatographic determination of total amino acids and protein in sediments using the ninhydrin-CO2 reaction (1983)
    Springer
    Hydrobiologia 101 (1983), S. 189-194 
    Details
    ISSN: 1573-5117
    Schlagwort(e): amino acids ; protein ; sediments ; ninhydrin reaction ; gas chromatography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A sensitive modification of the ninhydrin-CO2 method involving the gas chromatographic determination of the total protein and amino acid content of sediment is described. The method gives a linear response over the amino acid concentration range 10−5 M to 4 × 10−2 M. It can be used for whole sediment, hydrolysates and interstitial water. The performance of the method is compared with the fluorescamine method for primary amines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00009874
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  • 23
    Digitale Medien
    Digitale Medien
    Variability of Actinocyclus kuetzingii (A.S.) Sim. in the Littorina sediments of the Polish Baltic Coast (1983)
    Springer
    Hydrobiologia 103 (1983), S. 251-256 
    Details
    ISSN: 1573-5117
    Schlagwort(e): paleolimnology ; diatom flora ; sediments ; Vistula Lagoon ; Poland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The variability of Actinocyclus kuetzingii (A.S.) Sim. in the Littorina deposits of the Vistula Lagoon and Lake Druzno were studied. During the time of the Littorina Lake Druzno was a part of the Vistula Lagoon. In the different parts of the Lagoon both the abundance of A. kuetzingii and the diameter of its valves change in a manner associated with phases of the Littorina transgression. Coscinodiscus (Actinocyclus) kuetzingii fo. subsalsa Brockmann is probably an ecotype of A. kuetzingii (A.S.) Sim.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00028461
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