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  • 1
    Series available for loan
    Series available for loan
    Drei-Komponenten-Magnetometer für die Peilung des polaren Elektrojets (1970)
    Braunschweig : Inst. für Geophysik und Meteorologie der Techn. Univ. Braunschweig
    Associated volumes
    Details Availability
    Call number: SR 93.0336(10)
    In: Geophysikalische Arbeiten sowie Mitteilungen aus Meteorologie und Astrophysik
    Type of Medium: Series available for loan
    Pages: 67 S.
    Series Statement: Gamma 10
    Language: German
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Identification and Kinetic Study of the Peroxymalonyl Radical in the Aerobic Oxidation of Malonic Acid by Cerium(IV) (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 6372-6373 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00128a033
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  • 3
    Electronic Resource
    Electronic Resource
    On the Defect Structures in Te-Doped GaAs (1997)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 57-58 (July 1997), p. 425-430 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/25/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.57-58.425.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Optical and Magnetic Properties of Titanium Ions in CdTe and (Cd, Zn)Te (1993)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 143-147 (Oct. 1993), p. 435-440 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/00/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.143-147.435.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Transient analysis of earthquake and explosion arrivals (1959)
    Springer
    Pure and applied geophysics 44 (1959), S. 83-118 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Ein elektronischer Schallspektrograph wurde benutzt, um die nichtstationären Vorgänge in komplizierten Erdbeben- und Explosionswellen zu analysieren. Die Analyse von nichtstationären Vorgängen mittels dieses Schallspektrographen ergibt unmittelbar die Gruppengeschwindigkeit jeder einzelnen Spektralfrequenz für die verschiedenen seismischen Wellenphasen, die ja solche nichtstationären Vorgänge darstellen. Verglichen mit einer gewöhnlichen Frequenzanalyse liefert diese Art von Analyse die Spektralfeinstruktur des zeitlich sich ändernden Signals und nicht ein Mittel über ein Zeitintervall, das einen grösseren Teil des seismischen Schwingungsablaufs umfasst. Sowohl Dispersionserscheinungen in derP-Welle als auch deren diskretes Amplitudenspektrum wurden mit Hilfe dieser Analyse seismischer Signale festgestellt. Dispersion wurde mit ziemlicher Wahrscheinlichkeit auch bei derS-Welle beobachtet, und in den verschiedenen mehrfachreflektiertenS-Wellen zeigt sich in aufeinanderfolgenden Reflexionen eine Periodenzunahme. Das disperse Erscheinungsbild der Oberflächenwellen in ihrer Grundschwingungstype und den zugehörigen Schwingungstypen höherer Ordnung wurde für ozeanischen, kontinentalen und gemischten Weg aufgenommen. Unter diesen Wellentypen findet sich eine klare Andeutung der kontinentalen Scherschwingungsform zweiter Ordnung vom Rayleigh-Typus (Second Shear Mode). Die Aufspaltung von Oberflächenwellen für direkten und antipodalen Weg wurde ebenfalls erreicht. Unsere Ergebnisse zeigen eine gute Übereinstimmung mit den von herkömmlichen Methoden stammenden Resultaten. Die Dispersion von Wellentypen erster und höherer Ordnung, die durch Explosionen im Seichtwasser angeregt werden, kann leicht an Hand der Schallspektrogramme und momentanen Amplitudenspektren ihrer seismischen Signale untersucht werden. Solche Seichtwasserdetonationen zeigen Pulsationen und Airy-Phasen, die sich eindeutig auf den Spektrogrammen und Amplitudenbildern abzeichnen.
    Notes: Summary An electronic sound spectrograph has been used to analyze the transients in complicated earthquake and explosion signals. Transient analysis with a sound spectrograph gives a means for directly obtaining group velocity at each of the spectral frequencies for each of the separate arrival branches, for any type of transient signal. Compared to frequency analysis, it presents the fine spectral structure of the signal as it changes with time, not an average over a time that includes many parts of the seismic signal. Dispersion as well as the body wave spectrum of theP wave has been observed by transient analysis of seismic signals. Dispersion has also possibly been observed in theS wave, and in the various multiply reflectedS waves, which have been found to increase in period from one arrival to the next. The dispersed pattern of arrival of fundamental and higher mode surface waves has been observed for oceanic, continental, and mixed paths. Among these signals is a clear indication of the continental second shear mode. The separation of surface waves for the direct and complementary paths has also been accomplished. Our results compare well with those obtained by standard techniques. The dispersion of the fundamental and higher mode signals from explosive sources in shallow water may be easily studied by making sound spectrograms and amplitude sections of these seismic signals. These shallow water shots show bubble pulses and Airy phases, which are clearly defined on the spectrograms and sections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997639
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  • 6
    Electronic Resource
    Electronic Resource
    Transient analysis of seismic core phases (1962)
    Springer
    Pure and applied geophysics 52 (1962), S. 41-52 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Magnetbandaufzeichnungen von Erdbebensignalen können, mit vervielfachter Geschwindigkeit wiedergegeben, mittels eines elektronischen Schallspektrographen analysiert werden. Das zeitabhängige Raumwellenspektrum, das man aus einer solchen Analyse nichtstationärer Vorgänge erhält, gibt einen gewissen Einblick in die physikalischen Eigenschaften des Erdinnern. So wurde im kurzperiodischen Anteil der Raumwellen, die durch den äusseren und inneren Erdkern gelaufen sind, Dispersion beobachtet. BeiP′ wurde im Periodenbereich zwischen 1 und 2 Sekunden ein Gruppengeschwindigkeitsmaximum gefunden. Der direkte StrahlP′ und die einmal an der Erdoberfläche reflektiertePP-Welle transportieren mehr Energie als die WellenphasenP′ 2 undPcPP′, die erstens in den äusseren Erdkern unter einem sehr grossen Inzidenzwinkel eindringen und zweitens eine längere Zeit benötigen, um den äusseren Teil des flüssigkeitsähnlichen Kerns zu durchlaufen.
    Notes: Summary Speeded-up magnetic tape recordings of earthquake signals can be analyzed by means of an electronic sound spectrograph. The time-dependent spectrum of body waves obtained through transient analysis provides some insight into the physical properties of the earth's interior. In the short-period arrivals traveling through the outer core and inner core dispersion has been observed. A group velocity maximum has been found forP′ at periods between 1 and 2 seconds. The direct rayP′and the surface reflected phasePP convey more energy than the arrivalsP′ 2 andPcPP′ which, firstly, enter the outer core at incidence far from vertical, and secondly spend more time in the outer part of the fluid core.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01995998
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  • 7
    Electronic Resource
    Electronic Resource
    Cell adhesion to extracellular matrix is different in marine hydrozoans compared with vertebrates (1995)
    Springer
    Development genes and evolution 204 (1995), S. 465-476 
    Details
    ISSN: 1432-041X
    Keywords: Cell-ECM interactions ; Hydrozoa Vertebrates ; Xenografts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Extracellular matrices (ECMs) of phylogenetically very distant organisms were tested for their ability to support cell adhesion, spreading and DNA replication in reciprocal xenograft adhesion tests. Mechanically dissociated cells of the medusa Podocoryne carnea (Cnidaria, Hydrozoa) were seeded on ECMs of polyps and medusa, and on several ECM glycoproteins or entire ECMs from vertebrates. In reciprocal experiments, cells from different vertebrate cell-lines were seeded on ECMs of polyps, medusae and also on electrophoresed and blotted extracts of both types of ECMs. The results demonstrate that medusa cells adhere and spread on polyp and medusa ECMs but do not recognize vertebrate ECMs or purified ECM glycoproteins. Vertebrate cells in contrast adhere, spread and proliferate on ECMs of polyps and medusae. The number of attached cells depends on the cell type, the type of ECM and, in certain cases, on the stage of the cell cycle. Cell adhesion experiments with pretreated ECMs of polyps and medusae, e.g. oxidation of carbohydrate residues with sodium-metaperiodate, or blocking of certain carbohydrate moieties with the lectin wheat germ agglutinin or a carbohydrate-specific monoclonal antibody, demonstrate that ECM carbohydrates are more important for cell-ECM interactions of medusa cells than for vertebrate cells. Furthermore, the experiments indicate that polyp and medusa ECMs contain different components which strongly modulate adhesion, spreading and DNA replication of vertebrate cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360854
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  • 8
    Electronic Resource
    Electronic Resource
    Rigorous Bounds for the Föppl—von Kármán Theory of Isotropically Compressed Plates (2000)
    Springer
    Journal of nonlinear science 10 (2000), S. 661-685 
    Details
    ISSN: 1432-1467
    Keywords: Key words. thin film elasticity, blistering, von Kármán theory of plates, optimal scaling laws
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary. We study the Föppl—von Kármán theory for isotropically compressed thin plates in a geometrically linear setting, which is commonly used to model weak buckling of thin films. We consider generic smooth domains with clamped boundary conditions, and obtain rigorous upper and lower bounds on the minimum energy linear in the plate thickness σ . This energy is much lower than previous estimates based on certain dimensional reductions of the problem, which had lead to energies of order 1+σ (scalar approximation) or σ 2/3 (two-component approximation).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003320010007
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  • 9
    Electronic Resource
    Electronic Resource
    On the recognition of order and disorder (1987)
    Springer
    Biological cybernetics 57 (1987), S. 187-195 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract We compare several algorithms for the recognition of ordered and disordered images. As image sources we use waves of the Belousov-Zhabotinskii reaction coupled to convective motion in a petri dish. This device allows reversibly the generation of periodic (ordered) and aperiodic (disordered) patterns. The best match between the parametric description and the observations is obtained by an “autodifference function”. This function is computed by summing up intensity differences over all pairs of picture elements having a given distance on the picture plane. Then, the minimum of this function is determined upon variation of the distance. This algorithm is not only efficient for the recognition of order and disorder in “machine vision”, but also plausible in biological visual perception.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364150
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  • 10
    Electronic Resource
    Electronic Resource
    Defining the ancestral karyotype of all primates by multidirectional chromosome painting between tree shrews, lemurs and humans (1999)
    Springer
    Chromosoma 108 (1999), S. 393-400 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. We used multidirectional chromosome painting with probes derived by bivariate fluorescence-activated flow sorting of chromosomes from human, black lemur (Eulemur macaco macaco) and tree shrew (Tupaia belangeri, order Scandentia) to better define the karyological relationship of tree shrews and primates. An assumed close relationship between tree shrews and primates also assists in the reconstruction of the ancestral primate karyotype taking the tree shrew as an ”outgroup” species. The results indicate that T. belangeri has a highly derived karyotype. Tandem fusions or fissions of chromosomal segments seem to be the predominant mechanism in the evolution of this tree shrew karyotype. The 22 human autosomal painting probes delineated 40 different segments, which is in the range found in most mammals analyzed by chromosome painting up to now. There were no reciprocal translocations that would distinguish the karyotype of the tree shrew from an assumed primitive primate karyotype. This karyotype would have included the chromosomal forms 1a, 1b, 2a, 2b, 3/21, 4–11, 12a/22a, 12b/22b, 13, 14/15, 16a, 16b, 17, 18, 19a, 19b, 20 and X and Y and had a diploid chromosome number of 2n=50. Of these forms, chromosomes 1a, 1b, 4, 8, 12a/22a, and 12b/22bmay be common derived characters that would link the tree shrew with primates. To define the exact phylogenetic relationships of the tree shrews and the genomic rearrangements that gave rise to the primates and eventually to humans further chromosome painting in Rodentia, Lagomorpha, Dermoptera and Chiroptera is needed, but many of the landmarks of genomic evolution are now known.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004120050391
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