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  • 1
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    Magnitude spectra and other source parameters for some major 1985 and 1986 earthquakes (1988)
    In:  Tectonophysics, London, Icelandic Meteorological Office, Ministry for the Environment University of Iceland, vol. 152, no. 1-2, pp. 303-318, pp. B05S14, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1988
    Keywords: Spectrum ; Source parameters ; Magnitude ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Spectral magnitudes, magnitude spectra and earthquake quantification: how stable are the corner period and the maximum magnitude for a given earthquake (1989)
    In:  Tectonophysics, Hoboken, NJ, 633 pp. + CD-ROM, Pergamon, vol. 166, no. 19, pp. 205-220, pp. B05309, (ISBN 0-471-26610-8)
    Details
    Publication Date: 1989
    Keywords: Source parameters ; Spectrum ; Seismology ; Magnitude
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Schätzwerte der Magnitude eines Erdbebens auf Grund der Maximalintensität und anderer Herdparameter aus Erdbebenkatalogen (2000)
    In:  DGG Mittlg., New York, Am. Soc. Mech. Eng., vol. 2, no. 4, pp. 3-13, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 2000
    Keywords: Seismology ; Source parameters ; Earthquake catalog ; Intensity ; Magnitude
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Determination and interpretation of earthquake magnitude spectra (1988)
    In:  Geofizika, Hoboken, NJ, 633 pp. + CD-ROM, Pergamon, vol. 5, no. 19, pp. 5-19, pp. B05309, (ISBN 0-471-26610-8)
    Details
    Publication Date: 1988
    Keywords: Spectrum ; Seismology ; Magnitude
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Bestimmung mittlerer globaler Q-Werte aus Love-Wiederkehrwellen (1985)
    Inst. f. Geophys., Univ.
    In:  Diplomarbeit, Hamburg, Inst. f. Geophys., Univ., vol. C 560, 183 pp., no. C86, vol. 5, pp. 333-342, (ISBN 3-933346-037)
    Details
    Publication Date: 1985
    Keywords: Absorption ; Attenuation ; Quality factor ; Surface waves
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    The limits of the Bohm criterion in collisional plasmas (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-05-28
    Description: The sheath formation within a low-pressure collisional plasma is analysed by means of a two-fluid model. The Bohm criterion takes into account the effects of the electric field and the inertia of the ions. Numerical results yield that these effects contribute to the space charge formation, only, if the collisionality is lower than a relatively small threshold. It follows that a lower and an upper limit of the drift speed of the ions exist where the effects treated by Bohm can form a sheath. This interval becomes narrower as the collisionality increases and vanishes at the mentioned threshold. Above the threshold, the sheath is mainly created by collisions and the ionisation. Under these conditions, the sheath formation cannot be described by means of Bohm like criteria. In a few references, a so-called upper limit of the Bohm criterion is stated for collisional plasmas where the momentum equation of the ions is taken into account, only. However, the present paper shows that this limit results in an unrealistically steep increase of the space charge density towards the wall, and, therefore, it yields no useful limit of the Bohm velocity.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 7
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    Fishing and environment drive spatial heterogeneity in Celtic Sea fish community size structure (2011)
    Oxford University Press
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    Publication Date: 2011-11-24
    Description: Shephard, S., Gerritsen, H. D., Kaiser, M. J., Truszkowska, H. S., and Reid, D. G. 2011. Fishing and environment drive spatial heterogeneity in Celtic Sea fish community size structure. – ICES Journal of Marine Science, 68: 2106–2113. The Large Fish Indicator (LFI) is a univariate size-based indicator of fish community state that has been selected to support the OSPAR fish community Ecological Quality Objective (EcoQO). To operate this EcoQO, a survey-based LFI for each OSPAR region needs to be developed. However, fish communities in these regions are spatially heterogeneous, and there is evidence of within-region spatial variation in the LFI that could confound an overall indicator series. For Celtic Sea trawl-survey sites, spline correlograms indicate positive spatial autocorrelation at a similar range (~40 km) for the LFI and for fishing effort (h year –1 ) from vessel monitoring systems. Statistical models reveal a strong negative effect on annual LFI by site of fishing effort within a radius of 40 km. There was a weak effect of fishing within 20 km and no effect at 10 km. LFI also varied significantly with substratum and with local fish community composition identified by a resemblance matrix derived from the survey data. Finally, there was a weak effect of survey year on LFI. Spatial stratification of LFI calculations may be necessary when developing size-based indicators for OSPAR or Marine Strategy Framework Directive regions.
    Print ISSN: 1054-3139
    Electronic ISSN: 1095-9289
    Topics: Biology , Geosciences , Physics
    Published by Oxford University Press
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  • 8
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    Cell population identification using fluorescence-minus-one controls with a one-class classifying algorithm (2014)
    Oxford University Press
    Details
    Publication Date: 2014-11-26
    Description: Motivation: The tried and true approach of flow cytometry data analysis is to manually gate on each biomarker separately, which is feasible for a small number of biomarkers, e.g. less than five. However, this rapidly becomes confusing as the number of biomarker increases. Furthermore, multivariate structure is not taken into account. Recently, automated gating algorithms have been implemented, all of which rely on unsupervised learning methodology. However, all unsupervised learning outputs suffer the same difficulties in validation in the absence of external knowledge, regardless of application domain. Results: We present a new semi-automated algorithm for population discovery that is based on comparison to fluorescence-minus-one controls, thus transferring the problem into that of one-class classification, as opposed to being an unsupervised learning problem. The novel one-class classification algorithm is based on common principal components and can accommodate complex mixtures of multivariate densities. Computational time is short, and the simple nature of the calculations means the algorithm can easily be adapted to process large numbers of cells (10 6 ). Furthermore, we are able to find rare cell populations as well as populations with low biomarker concentration, both of which are inherently hard to do in an unsupervised learning context without prior knowledge of the samples’ composition. Availability and implementation: R scripts are available via https://fccf.mpiib-berlin.mpg.de/daten/drfz/bioinformatics/with{username,password}={bioinformatics,Sar=Gac4} . Contact: kristen.feher@drfz.de or kaiser@drfz.de Supplementary information: Supplementary data are available at Bioinformatics online.
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
    Published by Oxford University Press
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  • 9
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    Cell alignment required in differentiation of Myxococcus xanthus (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-08-24
    Description: During fruiting body morphogenesis of Myxococcus xanthus, cell movement is required for transmission of C-factor, a short range intercellular signaling protein necessary for sporulation and developmental gene expression. Nonmotile cells fail to sporulate and to express C-factor-dependent genes, but both defects were rescued by a simple manipulation of cell position that oriented the cells in aligned, parallel groups. A similar pattern of aligned cells normally results from coordinated recruitment of wildtype cells into multicellular aggregates, which later form mature fruiting bodies. It is proposed that directed cell movement establishes critical contacts between adjacent cells, which are required for efficient intercellular C-factor transmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, S K -- Kaiser, D -- AGO 2908/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1990 Aug 24;249(4971):926-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Stanford University School of Medicine, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2118274" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins ; Cell Differentiation ; Cell Division ; Cell Movement ; Kinetics ; Morphogenesis ; Myxococcales/*growth & development/physiology/ultrastructure ; Spores, Bacterial/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Cell-to-cell transfer of bacterial outer membrane lipoproteins (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-07-05
    Description: Myxococcus xanthus cells can glide forward by retracting type IV pili. Tgl, an outer membrane lipoprotein, is necessary to assemble pili. Tgl mutants can be transiently "stimulated" if brought into end-to-end contact with tgl+ donor cells. By separating the stimulated recipient cells from donor cells, we found that Tgl protein was transferred from the donors to the rescued recipient cells. Mutants lacking CglB lipoprotein, which is part of a second gliding engine, could also be stimulated, and CglB protein was transferred from donor to recipient cells. The high transfer efficiency of Tgl and CglB proteins suggests that donor and recipient cells briefly fuse their outer membranes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nudleman, Eric -- Wall, Daniel -- Kaiser, Dale -- GM23441/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Jul 1;309(5731):125-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Developmental Biology and Biochemistry, Stanford University School of Medicine, B300 Beckman Center, 279 Campus Drive, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15994555" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Bacterial/genetics/*metabolism ; Bacterial Proteins/genetics/*metabolism ; Cell Membrane/physiology ; Fimbriae Proteins/metabolism ; Flow Cytometry ; Green Fluorescent Proteins/genetics/metabolism ; Immunoblotting ; Lipoproteins/genetics/*metabolism ; Membrane Fusion ; Membrane Proteins/genetics/*metabolism ; Microscopy, Fluorescence ; Microscopy, Phase-Contrast ; Movement ; Mutation ; Myxococcus xanthus/genetics/*metabolism/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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