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  • 1
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    Datasets for the graphs of the paper (Fig. 2 to Fig. 7) (2011)
    PANGAEA
    In:  Supplement to: Zhu, Qiuan; Jiang, Hong; Peng, Changhui; Liu, Jinxun; Fang, Xiuqin; Wei, Xiaohua; Liu, Shirong; Zhou, Guomo (2011): Effects of future climate change, CO2 enrichment, and vegetation structure variation on hydrological processes in China. Global and Planetary Change, https://doi.org/10.1016/j.gloplacha.2011.10.010
    Details
    Publikationsdatum: 2023-01-13
    Beschreibung: Investigating the relationship between factors (climate change, atmospheric CO2 concentrations enrichment, and vegetation structure) and hydrological processes is important for understanding and predicting the interaction between the hydrosphere and biosphere. The Integrated Biosphere Simulator (IBIS) was used to evaluate the effects of climate change, rising CO2, and vegetation structure on hydrological processes in China at the end of the 21st century. Seven simulations were implemented using the assemblage of the IPCC climate and CO2 concentration scenarios, SRES A2 and SRES B1. Analysis results suggest that (1) climate change will have increasing effects on runoff evapotranspiration (ET), transpiration (T), and transpiration ratio (transpiration/evapotranspiration, T/E) in most hydrological regions of China except in the southernmost regions; (2) elevated CO2 concentrations will have increasing effects on runoff at the national scale, but at the hydrological region scale, the physiology effects induced by elevated CO2 concentration will depend on the vegetation types, climate conditions, and geographical background information with noticeable decreasing effects shown in the arid Inland region of China; (3) leaf area index (LAI) compensation effect and stomatal closure effect are the dominant factors on runoff in the arid Inland region and southern moist hydrological regions, respectively; (4) the magnitudes of climate change (especially the changing precipitation pattern) effects on the water cycle are much larger than those of the elevated CO2 concentration effects; however, increasing CO2 concentration will be one of the most important modifiers to the water cycle; (5) the water resource condition will be improved in northern China but depressed in southernmost China under the IPCC climate change scenarios, SRES A2 and SRES B1.
    Materialart: Dataset
    Format: application/zip, 52.7 kBytes
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    DATEN PANGAEA
  • 2
    Digitale Medien
    Digitale Medien
    New propagators for quantum-classical molecular dynamics simulations (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 930-935 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The propagation of quantum/classical molecular dynamics equations is investigated from two different points of view. One is to take into account the time-dependence of effective Hamiltonians of quantum and classical subsystems by the combination of Zhu and Zhao's time-independentlike split operator method [J. Chem. Phys. 105, 9536 (1996)] and a predictor-corrector technique. The other one is to introduce a time-independent quasi-Hamiltonian operator for the total system based on which new split-operator propagators are constructed. High-order quantum wave-packet propagators and the multiple time scale technique can be easily employed in our algorithms. Four new quantum/classical propagators are proposed and tested in a simple model system. It is found that combinations of our algorithms with high-order quantum propagators or the multiple time scale technique can give good results even with very large time steps. These new schemes will be particularly powerful in the case when the propagation of the classical subsystem is most time-consuming. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.481873
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  • 3
    Digitale Medien
    Digitale Medien
    Neutron-diffraction study of YFe10−xCoxSi2 : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 6543-6544 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: YFe10−xCoxSi2 (0≤x≤10) compounds were synthesized and studied by x-ray and neutron diffraction. The ThMn12-type structure can be formed in the entire range of composition. Magnetic properties were studied at fields up to 70 kOe in the temperature range of 1.5 K to room temperature. X-ray-diffraction analyses of aligned powders indicate that the easy magnetization direction is parallel to the c axis when x≤6, and deviates from the c axis when x≥ (R18)8. The site preference of Si and Co atoms in the structure was determined by neutron-diffraction experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.349901
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  • 4
    Digitale Medien
    Digitale Medien
    Improved Estimation of Weibull Parameters with the Linear Regression Method (2004)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 87 (2004), S. 0 
    Details
    ISSN: 1551-2916
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Maschinenbau , Physik
    Notizen: Monte Carlo simulations were used to search for the optimal probability estimator for estimating Weibull parameters with the linear regression method. Compared with commonly used probability estimators, the optimal one obtained gives a more accurate estimation of the Weibull modulus and the same estimation precision of the scale parameter. It is also concluded that the maximum likelihood method results in the highest precision, however, less conservative than the linear regression method.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1551-2916.2004.01799.x
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  • 5
    Digitale Medien
    Digitale Medien
    The Problems of Presentation of T Cell Receptor Peptides by Activated T Cells (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 636 (1991), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1991.tb33435.x
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  • 6
    Digitale Medien
    Digitale Medien
    The Specific Regulation Of Immune Responses By CD8+ T Cells Restricted By The MHC Class Ib Molecule, Qa-1 (2000)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Immunology 18 (2000), S. 185-216 
    Details
    ISSN: 0732-0582
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie , Medizin
    Notizen: Abstract Over the last three decades considerable evidence has accumulated that CD8+ T cells regulate peripheral immune responses, in part, by specifically controlling the outgrowth of antigen-triggered CD4+ T cells. This regulatory function of CD8+ T cells has been shown, in vivo, to control the emergence of autoreactive CD4+ T cells as well as CD4+ T cells reactive to conventional antigens, including alloantigens. In this review, we summarize the evidence that this immune suppression mediated by CD8+ T cells is dependent, in part, on specific cognate interactions between MHC class I-restricted regulatory CD8+ cells and antigen-activated CD4+ T cells. Moreover, we review the evidence that regulatory CD8+ T cells recognize antigen-activated CD4+ T cells in a TCR specific manner restricted by the MHC class Ib molecule, Qa-1. The Qa-1 molecule may be uniquely qualified to serve this MHC restrictive function because, unlike conventional MHC molecules, it is preferentially and transiently expressed on activated and not resting CD4+ T cells. This may assure that only recently antigen-activated CD4+ T cells expressing Qa-1/TCR peptide complexes will induce regulatory CD8+ T cells and subsequently become susceptible to regulation. Because Qa-1 also binds to self Qdm peptides that trigger NK (CD94/ NKG2) receptors on CD8+ T cells, the machinery for homeostatic regulation of regulatory CD8+ T cells can be envisioned. Finally, we propose a model by which these TCR specific, Qa-1-restricted regulatory CD8+ T cells selectively downregulate antigen-activated T cells expressing TCRs of certain affinities. Ultimately these regulatory CD8+ T cells control the peripheral TCR repertoire during the course of immune responses to both self and foreign antigens.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.immunol.18.1.185
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  • 7
    Digitale Medien
    Digitale Medien
    A transient kinetics study of char gasification in carbon dioxide and oxygen (1991)
    s.l. : American Chemical Society
    Energy & fuels 5 (1991), S. 68-74 
    Details
    ISSN: 1520-5029
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Energietechnik , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ef00025a011
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  • 8
    Digitale Medien
    Digitale Medien
    The discrete dynamics of symmetric competition in the plane (1987)
    Springer
    Journal of mathematical biology 25 (1987), S. 573-596 
    Details
    ISSN: 1432-1416
    Schlagwort(e): Discrete dynamical systems ; Lotka-Volterra competition ; symmetric Hopf bifurcation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Mathematik
    Notizen: Abstract We consider the generalized Lotka-Volterra two-species system $$\begin{gathered} x_{n + 1} = x_n \exp \left( {r_1 \left( {1 - x_n } \right) - s_1 y_n } \right) \hfill \\ y_{n + 1} = y_n \exp \left( {r_2 \left( {1 - y_n } \right) - s_2 x_n } \right) \hfill \\ \end{gathered} $$ originally proposed by R. M. May as a model for competitive interaction. In the symmetric case that r 1 = r 2 and s 1 = s 2, a region of ultimate confinement is found and the dynamics therein are described in some detail. The bifurcations of periodic points of low period are studied, and a cascade of period-doubling bifurcations is indicated. Within the confinement region, a parameter region is determined for the stable Hopf bifurcation of a pair of symmetrically placed period-two points, which imposes a second component of oscillation near the stable cycles. It is suggested that the symmetric competitive model contains much of the dynamical complexity to be expected in any discrete two-dimensional competitive model.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00275495
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  • 9
    Digitale Medien
    Digitale Medien
    Cdkn1a deletion improves stem cell function and lifespan of mice with dysfunctional telomeres without accelerating cancer formation (2007)
    [s.l.] : Nature Publishing Group
    Nature genetics 39 (2007), S. 99-105 
    Details
    ISSN: 1546-1718
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Medizin
    Notizen: [Auszug] Telomere shortening limits the proliferative lifespan of human cells by activation of DNA damage pathways, including upregulation of the cell cycle inhibitor p21 (encoded by Cdkn1a, also known as Cip1 and Waf1)) (refs. 1–5). Telomere shortening in response to mutation of the gene encoding ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/ng1937
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  • 10
    Digitale Medien
    Digitale Medien
    Mutations in NR4A2 associated with familial Parkinson disease (2003)
    [s.l.] : Nature Publishing Group
    Nature genetics 33 (2003), S. 85-89 
    Details
    ISSN: 1546-1718
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Medizin
    Notizen: [Auszug] NR4A2, encoding a member of nuclear receptor superfamily, is essential for the differentiation of the nigral dopaminergic neurons. To determine whether NR4A2 is a susceptibility gene for Parkinson disease, we carried out genetic analyses in 201 individuals affected with Parkinson disease and 221 ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/ng1066
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