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  • Springer  (6)
  • Kaiserslautern : Technische Universität Kaiserslautern, Lehrstuhl für Thermodynamik (LTD)  (1)
  • Nature Publishing Group (NPG)  (1)
  • Cambridge Univ. Press
  • PANGAEA
  • 2015-2019  (4)
  • 1985-1989  (4)
  • 1
    Online Resource
    Online Resource
    SkaSim: Skalierbare HPC-Software für molekulare Simulationen in der chemischen Industrie : Schlussbericht SkaSim-Projekt : Berichtszeitraum: 01.07.2013-30.06.2016 (2017)
    Kaiserslautern : Technische Universität Kaiserslautern, Lehrstuhl für Thermodynamik (LTD)
    Details Availability
    Keywords: Forschungsbericht ; Thermochemie ; Molekulardynamik ; Quantenchemie ; Verfahrenstechnik ; Hochleistungsrechnen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (12 Seiten, 434,24 KB)
    URL: https://edocs.tib.eu/files/e01fb17/887372171.pdf
    URL: https://doi.org/10.2314/GBV:887372171
    DOI: 10.2314/GBV:887372171
    Language: German
    Note: Förderkennzeichen BMBF 01IH13005D. - Verbund-Nummer 01145167 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Mit deutscher und englischer Zusammenfassung
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  • 2
    Electronic Resource
    Electronic Resource
    Resource selection by tropical frugivorous birds: integrating multiple interactions (1985)
    Springer
    Oecologia 66 (1985), S. 563-573 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Resource selection is a function of interactions of organisms (competition, predation) as well as characteristics of the resource and organisms. I provide a quantitative model that integrates these factors. I use the model to predict profitability of fruits to tropical birds, but the model and its predictions are applicable to a wider array of systems and organisms. Profitability of a fruit is determined by rewards provided by the pericarp (mass and caloric yields) relative to costs (metabolic requirements, handling time, search time, behavioral interference, predator avoidance) associated with finding and eating that fruit (Fig. 1). Fruits increase in profitability with increases in fruit size until increases in handling time offset increases in pericarp mass. The fruit size at which increases in handling time offset increases in pericarp mass varies among bird species due to differences in bill and body size. Decreases in feeding rate due to decreasing numbers of fruits and increasing search time causes reduced profitability and this effect becomes more severe with decreasing fruit size and/or increasing frugivore size. Consequently, as fruit size decreases relative to frugivore size, fruit abundance becomes increasingly important to fruit selection by frugivores. However, while profitability of resources is a function of characteristics of the resources and the organisms, biological interactions can change profitability rankings; resources that may be more profitable in the absence of behavioral interference, exploitation competition, or predation risk can become less profitable in the face of these interactions. The proposed model integrates these interactions to provide predictions of resource selection and these predictions are supported by published studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379351
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Species of reptiles occupying habitat islands in Western Arizona: a deterministic assemblage (1985)
    Springer
    Oecologia 66 (1985), S. 595-601 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Island size, habitat heterogeneity, and distance from major (“mainland”) stands of habitat were examined relative to composition and number of coexisting reptile species dependent on upland habitats of 11 mountain and 4 riparian habitat islands. Species richness increased with area on mountain islands, but area was unimportant in predicting species richness on riparian islands. Instead, isolation was of primary importance. Regardless of factors determining species richness, composition of species were deterministic; small assemblages were always totally included subsets of all larger assemblages. This pattern of determinism apparently reflects selective extinctions and the inability of species to recolonize due to the insurmountable barrier imposed by the Sonoran Desert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379354
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Protein and collagen content of rat skeletal muscle following space flight (1988)
    Springer
    Cell & tissue research 254 (1988), S. 251-253 
    Details
    ISSN: 1432-0878
    Keywords: Space flight ; Skeletal muscle ; Collagen ; Protein ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Biochemical determinations of non-collagenous protein and hydroxyproline were made on rat skeletal muscles following 7 days of space flight aboard the NASA space shuttle mission SL-3. Relative to ground-based controls, the wet weight of each experimental muscle was significantly reduced. This was concomitant with a reduction in noncollagenous protein in the muscles. Protein concentration, however, was reduced only in slow-twitch muscles. The effect of space flight on the concentration and hydroxyproline content was different among the muscles. As a result, the loss of muscle mass in some muscles was the consequence of a reduction in both collagenous and non-collagenous proteins, while in others it was primarily the result of a non-collagenous protein loss.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220042
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Processes organizing open-nesting bird assemblages: competition or nest predation? (1988)
    Springer
    Evolutionary ecology 2 (1988), S. 37-50 
    Details
    ISSN: 1573-8477
    Keywords: Nest predation ; open nesting birds ; assemblage organization ; apparent competition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The addition of nest predation as a major process to current theories of space utilization and coexistence of open-nesting bird species adds predictive power to hypotheses of resource partitioning and organization of species assemblages. Nest predation can influence the organization of assemblages if predators respond to nests in a density-dependent manner and if predators specialize on nest types. Evidence shows that nest predation is commonly density-dependent and that predators can specialize on nest types. Consequently, nest predation can select for coexistence of bird species that nest at different heights and in different microhabitats (i.e. partitioning of nesting space) to minimize density-dependent responses of predators to the accumulating densities of species within similar nest sites. I establish a series of predicted patterns (1) to test whether predation is operating to influence partitioning of space and coexistence of species, (2) to distinguish effects of nest predation from competition, and (3) to determine the mechanism by which nest predation acts to organize assemblages. Using published and unpublished data to test the predictions, nest predation is seen as a process that we can no longer afford to ignore.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071587
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    Paper (German National Licenses)
    Fulltext
  • 6
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    Atmospheric feedbacks in North Africa from an irrigated, afforested Sahara (2018)
    Springer
    In:  Climate Dynamics, 50 (11-12). pp. 4561-4581.
    Details
    Publication Date: 2021-02-08
    Description: Afforestation of the Sahara has been proposed as a climate engineering method to sequester a substantial amount of carbon dioxide, potentially effective to mitigate climate change. Earlier studies predicted changes in the atmospheric circulation system. These atmospheric feedbacks raise questions about the self-sustainability of such an intervention, but have not been investigated in detail. Here, we investigate changes in precipitation and circulation in response to Saharan large-scale afforestation and irrigation with NCAR’s CESM-WACCM Earth system model. Our model results show a Saharan temperature reduction by 6 K and weak precipitation enhancement by 267 mm/year over the Sahara. Only 26% of the evapotranspirated water re-precipitates over the Saharan Desert, considerably large amounts are advected southward to the Sahel zone and enhance the West African monsoon (WAM). Different processes cause circulation and precipitation changes over North Africa. The increase in atmospheric moisture leads to radiative cooling above the Sahara and increased high-level cloud coverage as well as atmospheric warming above the Sahel zone. Both lead to a circulation anomaly with descending air over the Sahara and ascending air over the Sahel zone. Together with changes in the meridional temperature gradient, this results in a southward shift of the inner-tropical front. The strengthening of the Tropical easterly jet and the northward displacement of the African easterly jet is associated with a northward displacement and strengthening of the WAM precipitation. Our results suggest complex atmospheric circulation feedbacks, which reduce the precipitation potential over an afforested Sahara and enhance WAM precipitation.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00382-017-3890-8
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Uncertainty in twenty-first century projections of the Atlantic Meridional Overturning Circulation in CMIP3 and CMIP5 models (2017)
    Springer
    In:  Climate Dynamics, 49 (5-6). pp. 1495-1511.
    Details
    Publication Date: 2020-02-06
    Description: Uncertainty in the strength of the Atlantic Meridional Overturning Circulation (AMOC) is analyzed in the Coupled Model Intercomparison Project Phase 3 (CMIP3) and Phase 5 (CMIP5) projections for the twenty-first century; and the different sources of uncertainty (scenario, internal and model) are quantified. Although the uncertainty in future projections of the AMOC index at 30°N is larger in CMIP5 than in CMIP3, the signal-to-noise ratio is comparable during the second half of the century and even larger in CMIP5 during the first half. This is due to a stronger AMOC reduction in CMIP5. At lead times longer than a few decades, model uncertainty dominates uncertainty in future projections of AMOC strength in both the CMIP3 and CMIP5 model ensembles. Internal variability significantly contributes only during the first few decades, while scenario uncertainty is relatively small at all lead times. Model uncertainty in future changes in AMOC strength arises mostly from uncertainty in density, as uncertainty arising from wind stress (Ekman transport) is negligible. Finally, the uncertainty in changes in the density originates mostly from the simulation of salinity, rather than temperature. High-latitude freshwater flux and the subpolar gyre projections were also analyzed, because these quantities are thought to play an important role for the future AMOC changes. The freshwater input in high latitudes is projected to increase and the subpolar gyre is projected to weaken. Both the freshening and the gyre weakening likely influence the AMOC by causing anomalous salinity advection into the regions of deep water formation. While the high model uncertainty in both parameters may explain the uncertainty in the AMOC projection, deeper insight into the mechanisms for AMOC is required to reach a more quantitative conclusion.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
    Format: text
    DOI: 10.1007/s00382-016-3180-x
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Analysis of immunoglobulin transcripts and hypermutation following SHIVAD8 infection and protein-plus-adjuvant immunization (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-04-12
    Description: Article HIV vaccine development will be facilitated by having animal models that are predictive for translation to humans. Here, the authors use two nonhuman primate models to compare the effects of natural infection and different adjuvants on antigen persistence, diversity and humoral immunity. Nature Communications doi: 10.1038/ncomms7565 Authors: Joseph R. Francica, Zizhang Sheng, Zhenhai Zhang, Yoshiaki Nishimura, Masashi Shingai, Akshaya Ramesh, Brandon F. Keele, Stephen D. Schmidt, Barbara J. Flynn, Sam Darko, Rebecca M. Lynch, Takuya Yamamoto, Rodrigo Matus-Nicodemos, David Wolinsky, Martha Nason, Nicholas M. Valiante, Padma Malyala, Ennio De Gregorio, Susan W. Barnett, Manmohan Singh, Derek T. O’Hagan, Richard A. Koup, John R. Mascola, Malcolm A. Martin, Thomas B. Kepler, Daniel C. Douek, Lawrence Shapiro, Robert A. Seder
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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