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  • 1
    Monograph available for loan
    Monograph available for loan
    Contributions to global change research : a report by the german national committee on global change research (2001)
    Bonn : Selbstverlag
    Details Availability
    Call number: PIK N 071-01-0543
    Type of Medium: Monograph available for loan
    Pages: 140 p.
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 2
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    Does the Madden-Julian Oscillation Modulate Stratospheric Gravity Waves? (2016)
    Wiley
    Details
    Publication Date: 2016-04-05
    Description: The circulation of the stratosphere is strongly influenced by the fluxes of gravity waves propagating from tropospheric sources. In the tropics, these gravity waves are primarily generated by convection. The Madden-Julian Oscillation (MJO) dominates the intra-seasonal variability of this convection. However, the influence of the MJO on the variability of stratospheric gravity waves is largely unknown. Here we examine gravity-wave potential energy at 26 km and the upper tropospheric zonal-wind anomaly of the MJO at 200 hPa, sorted by the relative phase of the MJO using the RMM MJO indices. We show that a strong anti-correlation exists between gravity-wave potential energy and the MJO eastward wind anomaly. We propose that this correlation is a result of the filtering of upward-propagating waves by the MJO winds. The study provides the first observational evidence that the MJO contributes significantly to the global variability of stratospheric gravity waves in the tropics.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 3
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    The influence of forage, protected areas, and mating prospects on grouping patterns of male elephants (2014)
    Oxford University Press
    Details
    Publication Date: 2014-11-15
    Description: Factors affecting social group size in mammals are relatively well studied for females, but less is known about determinants of group size for males, particularly in species that live in sexually segregated groups. Male grouping patterns are thought to be driven more by spatial and temporal dispersion of mating opportunities than by food resources or predation risk. We evaluated the influence of 3 factors on male group sizes and number of males in mixed-sex groups in African elephants; forage availability (using Normalized Difference Vegetation Index, a satellite-based indicator of primary productivity), anthropogenic mortality risk (using distance of elephants from a protected area center), and mating opportunities (using the number of males in mixed-sex groups with and without estrous females). Using zero-truncated negative binomial regressions and a model-selection approach, we found that male elephants occurred in larger groups where primary productivity was higher and where they were further from a protected area center. However, we found an interaction between primary productivity and anthropogenic mortality risk: at low primary productivity, elephants formed larger groups further away from a protected area center, but did less so at higher primary productivity. This pattern suggests that male elephants are sensitive to seasonal variation in potential anthropogenic mortality risk, by remaining in smaller groups when risk is low, but forming larger groups when risk is high. Mating opportunities also led to an increase in male numbers in mixed-sex groups, but its relative influence on male grouping was less important because mating opportunities were rare.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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  • 4
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    A method to estimate the yield of an underground nuclear explosion (1988)
    In:  J. of App. Phys., Edmonton, Conseil de l'Europe, vol. 63, no. 1-4, pp. 4771-4773, pp. 2340, (ISSN: 1340-4202)
    Details
    Publication Date: 1988
    Keywords: Nuclear explosion ; Discrimination ; Seismology ; Energy (of earthquakes)
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Author Correction: The pleasantness of sensory dissonance is mediated by musical style and expertise (2019)
    Springer Nature
    Details
    Publication Date: 2019
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 6
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    Mechanisms of arrhythmias by hypoactive RyR2 [Physiology] (2015)
    National Academy of Sciences
    Details
    Publication Date: 2015-04-01
    Description: Current mechanisms of arrhythmogenesis in catecholaminergic polymorphic ventricular tachycardia (CPVT) require spontaneous Ca2+ release via cardiac ryanodine receptor (RyR2) channels affected by gain-of-function mutations. Hence, hyperactive RyR2 channels eager to release Ca2+ on their own appear as essential components of this arrhythmogenic scheme. This mechanism, therefore, appears inadequate to explain...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 7
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    Matriarchs as repositories of social knowledge in African elephants (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-21
    Description: Despite widespread interest in the evolution of social intelligence, little is known about how wild animals acquire and store information about social companions or whether individuals possessing enhanced social knowledge derive biological fitness benefits. Using playback experiments on African elephants (Loxodonta africana), we demonstrated that the possession of enhanced discriminatory abilities by the oldest individual in a group can influence the social knowledge of the group as a whole. These superior abilities for social discrimination may result in higher per capita reproductive success for female groups led by older individuals. Our findings imply that the removal of older, more experienced individuals, which are often targets for hunters because of their large size, could have serious consequences for endangered populations of advanced social mammals such as elephants and whales.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McComb, K -- Moss, C -- Durant, S M -- Baker, L -- Sayialel, S -- New York, N.Y. -- Science. 2001 Apr 20;292(5516):491-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Experimental Psychology, School of Biological Sciences, University of Sussex, Brighton BN1 9QG, UK. karenm@biols.susx.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11313492" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; *Behavior, Animal ; Biological Evolution ; Conservation of Natural Resources ; *Discrimination (Psychology) ; *Elephants/physiology ; Exploratory Behavior ; Female ; Kenya ; Reproduction ; Social Behavior ; *Vocalization, Animal
    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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  • 8
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    Epitaxial growth of diamond films on si(111) at room temperature by mass-selected low-energy c+ beams (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-02-24
    Description: Diamond films ( approximately 0.7 micrometer thick) have been epitaxially grown on Si(111) substrates at room temperature with mass-selected 120-electronvolt C(+) ions. The diamond reflections observed in x-ray diffraction are well localized at their predicted positions, indicating that (i) the diamond(111) and (220) planes are parallel to the Si(111) and (220), respectively; (ii) the diamond rotational spread around its (111) normal is approximately 1.7 degrees ; and (iii) the mosaic block size is approximately 150 A. The film growth is discussed in terms of subplantation-a shallow subsurface implantation model. This discovery is an important step toward diamond semiconductor devices.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Robertson, J L -- Moss, S C -- Lifshitz, Y -- Kasi, S R -- Rabalais, J W -- Lempert, G D -- Rapoport, E -- New York, N.Y. -- Science. 1989 Feb 24;243(4894):1047-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17734807" target="_blank"〉PubMed〈/a〉
    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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  • 9
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    Retraction (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-06-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moss, S C -- New York, N.Y. -- Science. 1989 Jun 2;244(4908):1029-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17741028" target="_blank"〉PubMed〈/a〉
    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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    Compromised survivorship in zoo elephants (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-12-17
    Description: We analyzed data from over 4500 elephants to show that animals in European zoos have about half the median life span of conspecifics in protected populations in range countries. This discrepancy is clearest in Asian elephants; unlike African elephants in zoos, this species' infant mortality is very high (for example, twice that seen in Burmese timber camps), and its adult survivorship in zoos has not improved significantly in recent years. One risk factor for Asian zoo elephants is being moved between institutions, with early removal from the mother tending to have additional adverse effects. Another risk factor is being born into a zoo rather than being imported from the wild, with poor adult survivorship in zoo-born Asians apparently being conferred prenatally or in early infancy. We suggest stress and/or obesity as likely causes of zoo elephants' compromised survivorship.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clubb, Ros -- Rowcliffe, Marcus -- Lee, Phyllis -- Mar, Khyne U -- Moss, Cynthia -- Mason, Georgia J -- New York, N.Y. -- Science. 2008 Dec 12;322(5908):1649. doi: 10.1126/science.1164298.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Royal Society for the Prevention of Cruelty to Animals (RSPCA), Wilberforce Way, Southwater, West Sussex, RH13 9RS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19074339" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animal Welfare ; Animals ; Animals, Wild ; *Animals, Zoo ; Asia ; *Elephants ; Female ; Kaplan-Meier Estimate ; Kenya ; *Longevity ; Mortality ; Myanmar
    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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