Search Results - (Author, Cooperation:P. Forster)
-
1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2011-09-10Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Africa ; Americas ; Asia ; Chromosomes, Human, Y/*genetics ; Continental Population Groups/*genetics ; *Cultural Evolution ; DNA, Mitochondrial/genetics ; *Emigration and Immigration ; Europe ; Female ; Humans ; India ; *Language ; Male ; Pacific Islands ; Sex CharacteristicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressM. Rasmussen ; X. Guo ; Y. Wang ; K. E. Lohmueller ; S. Rasmussen ; A. Albrechtsen ; L. Skotte ; S. Lindgreen ; M. Metspalu ; T. Jombart ; T. Kivisild ; W. Zhai ; A. Eriksson ; A. Manica ; L. Orlando ; F. M. De La Vega ; S. Tridico ; E. Metspalu ; K. Nielsen ; M. C. Avila-Arcos ; J. V. Moreno-Mayar ; C. Muller ; J. Dortch ; M. T. Gilbert ; O. Lund ; A. Wesolowska ; M. Karmin ; L. A. Weinert ; B. Wang ; J. Li ; S. Tai ; F. Xiao ; T. Hanihara ; G. van Driem ; A. R. Jha ; F. X. Ricaut ; P. de Knijff ; A. B. Migliano ; I. Gallego Romero ; K. Kristiansen ; D. M. Lambert ; S. Brunak ; P. Forster ; B. Brinkmann ; O. Nehlich ; M. Bunce ; M. Richards ; R. Gupta ; C. D. Bustamante ; A. Krogh ; R. A. Foley ; M. M. Lahr ; F. Balloux ; T. Sicheritz-Ponten ; R. Villems ; R. Nielsen ; J. Wang ; E. Willerslev
American Association for the Advancement of Science (AAAS)
Published 2011Staff ViewPublication Date: 2011-09-24Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: African Continental Ancestry Group ; Animals ; Asia ; Asian Continental Ancestry Group/genetics ; Computer Simulation ; DNA, Mitochondrial/genetics ; Emigration and Immigration ; Ethnic Groups/genetics ; European Continental Ancestry Group/genetics ; Far East ; Gene Flow ; Gene Frequency ; Genetics, Population/methods ; *Genome, Human ; Genome, Mitochondrial ; Haplotypes ; Hominidae/genetics ; Humans ; Linkage Disequilibrium ; Male ; Oceanic Ancestry Group/*genetics ; Phylogeny ; Polymorphism, Single Nucleotide ; Sequence Analysis, DNA ; Western AustraliaPublished by: -
3Latest Papers from Table of Contents or Articles in PressR. Kieffer, L. Bartnik, M. Bergamaschi, V. V. Bleko, M. Billing, L. Bobb, J. Conway, M. Forster, P. Karataev, A. S. Konkov, R. O. Jones, T. Lefevre, J. S. Markova, S. Mazzoni, Y. Padilla Fuentes, A. P. Potylitsyn, J. Shanks, and S. Wang
American Physical Society (APS)
Published 2018Staff ViewPublication Date: 2018-08-02Publisher: American Physical Society (APS)Print ISSN: 0031-9007Electronic ISSN: 1079-7114Topics: PhysicsKeywords: Plasma and Beam PhysicsPublished by: -
4Articles: DFG German National LicensesStaff View
ISSN: 0301-0104Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 0191-6599Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: HistoryPolitical ScienceType of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 0169-7439Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 1436-5057Source: Springer Online Journal Archives 1860-2000Topics: Computer ScienceDescription / Table of Contents: Abstract Error bounds for the Galerkin procedure are given for a class of non linear problems. In Sectin 3, these results are applied to non linear boundary value problems and to polynomials as coordinate functions. In this case, known results are improved.Notes: Zusammenfassung Es werden Fehlerabschätzungen zum Galerkin-Verfahren für eine Klasse von nicht linearen Problemen angegeben. Im Absatz 3 werden diese Abschätzungen für nicht lineare Randwertaufgaben und für Polynome als Ansatzfunktionen zum Galerkin-Verfahren ausgewertet, wobei sich bekannte Ergebnisse verbessern Lassen.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 0945-3245Source: Springer Online Journal Archives 1860-2000Topics: MathematicsNotes: Summary Following [5, 6], the discrete variational Green's function is introduced for more general boundary value problems with ordinary differential equations. Error bounds for Galerkin approximations are then stated by means of the discrete variational Green's function.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1432-0894Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsNotes: Abstract Radiative forcing and climate sensitivity have been widely used as concepts to understand climate change. This work performs climate change experiments with an intermediate general circulation model (IGCM) to examine the robustness of the radiative forcing concept for carbon dioxide and solar constant changes. This IGCM has been specifically developed as a computationally fast model, but one that allows an interaction between physical processes and large-scale dynamics; the model allows many long integrations to be performed relatively quickly. It employs a fast and accurate radiative transfer scheme, as well as simple convection and surface schemes, and a slab ocean, to model the effects of climate change mechanisms on the atmospheric temperatures and dynamics with a reasonable degree of complexity. The climatology of the IGCM run at T-21 resolution with 22 levels is compared to European Centre for Medium Range Weather Forecasting Reanalysis data. The response of the model to changes in carbon dioxide and solar output are examined when these changes are applied globally and when constrained geographically (e.g. over land only). The CO2 experiments have a roughly 17% higher climate sensitivity than the solar experiments. It is also found that a forcing at high latitudes causes a 40% higher climate sensitivity than a forcing only applied at low latitudes. It is found that, despite differences in the model feedbacks, climate sensitivity is roughly constant over a range of distributions of CO2 and solar forcings. Hence, in the IGCM at least, the radiative forcing concept is capable of predicting global surface temperature changes to within 30%, for the perturbations described here. It is concluded that radiative forcing remains a useful tool for assessing the natural and anthropogenic impact of climate change mechanisms on surface temperature.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1432-0894Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsNotes: Abstract. The concept of radiative forcing has been extensively used as an indicator of the potential importance of climate change mechanisms. It allows a first order estimate of the global-mean surface temperature change; and it is possible to compare forcings from different mechanisms, on the assumption that similar global-mean forcings produce similar global-mean surface temperature changes. This study illustrates two circumstances where simple models show that the conventional definition of radiative forcing needs refining. These problems arise mainly with the calculation of forcing due to stratospheric ozone depletion. The first part uses simple arguments to produce an alternative definition of radiative forcing, using a time-dependent stratospheric adjustment method, which can give different forcings from those calculated using the standard definition. A seasonally varying ozone depletion can produce a quite different seasonal evolution of forcing than fixed dynamical heating arguments would suggest. This is especially true of an idealised and extreme “Antarctic ozone hole” type scenario where a sudden loss of ozone is followed by a sudden recovery. However, for observed ozone changes the annually averaged forcing is usually within 5% of the forcing calculated using the fixed dynamical heating approximation. Another problem with the accepted view of radiative forcing arises from the definition of the tropopause considered in the second part of this study. For a correct radiative forcing estimate the “tropopause” needs to separate the atmosphere into regions with a purely radiative response and those with a radiative-convective response. From radiative-convective model results it is found that radiative equilibrium conditions persist for several kilometres below the tropopause (the tropopause being defined as where the lapse rate reaches 2 K km-1). This region needs to be included in stratospheric adjustment calculations for an accurate calculation of forcing, as it is only the region between the surface and the top of the convection that can be considered as a single, forced, system. Including temperature changes in this region has a very large effect on stratospheric ozone forcing estimates, and can reduce the magnitude of the forcing by more than a factor of two. Although these experiments are performed using simple climate models, the results are of equal importance for the analysis of forcing-response relationships using general circulation models.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesBrinkmann, C. ; Forster, P. ; Schürenkamp, M. ; Horst, J. ; Rolf, B. ; Brinkmann, B.
Springer
Published 1999Staff ViewISSN: 1437-1596Keywords: Key words Y-chromosome ; Kurdistan ; Microsatellite ; Match ; ProbabilitySource: Springer Online Journal Archives 1860-2000Topics: MedicineLawNotes: Abstract In an Iraqi Kurdish population sample (n = 101), seven polymorphic STR loci of the Y-chromosome (DYS19, 389, 390, 391, 392, 393, and DXYS156-Y) were typed, with DYS389 being subtyped for its four segments. The haplotype diversity was 97.83% and 82 different haplotypes were observed. The Kurds shared some Y-types with neighbouring south Turks but strikingly few with Germans: it is 20–30 times more likely to find a sequence match in a random pair of Kurds than in a random Kurd-German pair.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesPfeiffer, H. ; Brinkmann, B. ; Hühne, J. ; Rolf, B. ; Morris, A. A. ; Steighner, R. ; Holland, M. M. ; Forster, P.
Springer
Published 1999Staff ViewISSN: 1437-1596Keywords: Key words Mitochondrial DNA ; Hypervariable ; regions ; Population study ; Match probabilitySource: Springer Online Journal Archives 1860-2000Topics: MedicineLawNotes: Abstract Mitochondrial DNA control region sequences were determined in 109 unrelated German Caucasoid individuals from north west Germany for both hypervariable regions 1 (HV1) and 2 (HV2) and 100 polymorphic nucleotide positions (nps) were found, 63 in HV1 and 37 in HV2. A total of 100 different mtDNA lineages was revealed, of which 7 were shared by 2 individuals and 1 by 3 individuals. The probability of drawing a HV1 sequence match within the north west Germans or within published sets of south Germans and west Austrians is similar (within a factor of 2) to drawing a sequence match between any two of these three population samples. Furthermore, HV1 sequences of 700 male inhabitants of one village in Lower Saxony were generated and these showed a nearly linear increase of the number of different haplotypes with increasing number of individuals, demonstrating that the commonly used haplotype diversity measure (Nei 1987) for population samples tends to underestimate mtDNA diversity in the actual population.Type of Medium: Electronic ResourceURL: