ALBERT

Description: Author(s): S. Friederich, H. C. Krahl, and C. Wetterich The phases with spontaneously broken symmetries corresponding to antiferromagnetic and d-wave superconducting order in the two-dimensional t-t^{'} -Hubbard model are investigated by means of the functional renormalization group. The introduction of composite boson fields in the magnetic, charge dens... [Phys. Rev. B 83, 155125] Published Fri Apr 29, 2011

Description: We generated genome-wide data from 69 Europeans who lived between 8,000-3,000 years ago by enriching ancient DNA libraries for a target set of almost 400,000 polymorphisms. Enrichment of these positions decreases the sequencing required for genome-wide ancient DNA analysis by a median of around 250-fold, allowing us to study an order of magnitude more individuals than previous studies and to obtain new insights about the past. We show that the populations of Western and Far Eastern Europe followed opposite trajectories between 8,000-5,000 years ago. At the beginning of the Neolithic period in Europe, approximately 8,000-7,000 years ago, closely related groups of early farmers appeared in Germany, Hungary and Spain, different from indigenous hunter-gatherers, whereas Russia was inhabited by a distinctive population of hunter-gatherers with high affinity to a approximately 24,000-year-old Siberian. By approximately 6,000-5,000 years ago, farmers throughout much of Europe had more hunter-gatherer ancestry than their predecessors, but in Russia, the Yamnaya steppe herders of this time were descended not only from the preceding eastern European hunter-gatherers, but also from a population of Near Eastern ancestry. Western and Eastern Europe came into contact approximately 4,500 years ago, as the Late Neolithic Corded Ware people from Germany traced approximately 75% of their ancestry to the Yamnaya, documenting a massive migration into the heartland of Europe from its eastern periphery. This steppe ancestry persisted in all sampled central Europeans until at least approximately 3,000 years ago, and is ubiquitous in present-day Europeans. These results provide support for a steppe origin of at least some of the Indo-European languages of Europe.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haak, Wolfgang -- Lazaridis, Iosif -- Patterson, Nick -- Rohland, Nadin -- Mallick, Swapan -- Llamas, Bastien -- Brandt, Guido -- Nordenfelt, Susanne -- Harney, Eadaoin -- Stewardson, Kristin -- Fu, Qiaomei -- Mittnik, Alissa -- Banffy, Eszter -- Economou, Christos -- Francken, Michael -- Friederich, Susanne -- Pena, Rafael Garrido -- Hallgren, Fredrik -- Khartanovich, Valery -- Khokhlov, Aleksandr -- Kunst, Michael -- Kuznetsov, Pavel -- Meller, Harald -- Mochalov, Oleg -- Moiseyev, Vayacheslav -- Nicklisch, Nicole -- Pichler, Sandra L -- Risch, Roberto -- Rojo Guerra, Manuel A -- Roth, Christina -- Szecsenyi-Nagy, Anna -- Wahl, Joachim -- Meyer, Matthias -- Krause, Johannes -- Brown, Dorcas -- Anthony, David -- Cooper, Alan -- Alt, Kurt Werner -- Reich, David -- GM100233/GM/NIGMS NIH HHS/ -- R01 HG006399/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Jun 11;522(7555):207-11. doi: 10.1038/nature14317. Epub 2015 Mar 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Australian Centre for Ancient DNA, School of Earth and Environmental Sciences &Environment Institute, University of Adelaide, Adelaide, South Australia 5005, Australia. ; 1] Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, USA. ; Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, USA. ; 1] Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, USA [3] Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Institute of Anthropology, Johannes Gutenberg University of Mainz, D-55128 Mainz, Germany. ; 1] Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, USA [3] Max Planck Institute for Evolutionary Anthropology, D-04103 Leipzig, Germany [4] Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, IVPP, CAS, Beijing 100049, China. ; Institute for Archaeological Sciences, University of Tubingen, D-72070 Tubingen, Germany. ; 1] Institute of Archaeology, Research Centre for the Humanities, Hungarian Academy of Science, H-1014 Budapest, Hungary [2] Romisch Germanische Kommission (RGK) Frankfurt, D-60325 Frankfurt, Germany. ; Archaeological Research Laboratory, Stockholm University, 114 18 Stockholm, Sweden. ; Departments of Paleoanthropology and Archaeogenetics, Senckenberg Center for Human Evolution and Paleoenvironment, University of Tubingen, D-72070 Tubingen, Germany. ; State Office for Heritage Management and Archaeology Saxony-Anhalt and State Museum of Prehistory, D-06114 Halle, Germany. ; Departamento de Prehistoria y Arqueologia, Facultad de Filosofia y Letras, Universidad Autonoma de Madrid, E-28049 Madrid, Spain. ; The Cultural Heritage Foundation, Vasteras 722 12, Sweden. ; Peter the Great Museum of Anthropology and Ethnography (Kunstkamera) RAS, St Petersburg 199034, Russia. ; Volga State Academy of Social Sciences and Humanities, Samara 443099, Russia. ; Deutsches Archaeologisches Institut, Abteilung Madrid, E-28002 Madrid, Spain. ; 1] Institute of Anthropology, Johannes Gutenberg University of Mainz, D-55128 Mainz, Germany [2] State Office for Heritage Management and Archaeology Saxony-Anhalt and State Museum of Prehistory, D-06114 Halle, Germany [3] Danube Private University, A-3500 Krems, Austria. ; Institute for Prehistory and Archaeological Science, University of Basel, CH-4003 Basel, Switzerland. ; Departamento de Prehistoria, Universitat Autonoma de Barcelona, E-08193 Barcelona, Spain. ; Departamento de Prehistoria y Arqueolgia, Universidad de Valladolid, E-47002 Valladolid, Spain. ; 1] Institute of Anthropology, Johannes Gutenberg University of Mainz, D-55128 Mainz, Germany [2] Institute of Archaeology, Research Centre for the Humanities, Hungarian Academy of Science, H-1014 Budapest, Hungary. ; State Office for Cultural Heritage Management Baden-Wurttemberg, Osteology, D-78467 Konstanz, Germany. ; Max Planck Institute for Evolutionary Anthropology, D-04103 Leipzig, Germany. ; 1] Institute for Archaeological Sciences, University of Tubingen, D-72070 Tubingen, Germany [2] Departments of Paleoanthropology and Archaeogenetics, Senckenberg Center for Human Evolution and Paleoenvironment, University of Tubingen, D-72070 Tubingen, Germany [3] Max Planck Institute for the Science of Human History, D-07745 Jena, Germany. ; Anthropology Department, Hartwick College, Oneonta, New York 13820, USA. ; 1] Institute of Anthropology, Johannes Gutenberg University of Mainz, D-55128 Mainz, Germany [2] State Office for Heritage Management and Archaeology Saxony-Anhalt and State Museum of Prehistory, D-06114 Halle, Germany [3] Danube Private University, A-3500 Krems, Austria [4] Institute for Prehistory and Archaeological Science, University of Basel, CH-4003 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25731166" target="_blank"〉PubMed〈/a〉

Description: The processes that shaped modern European mitochondrial DNA (mtDNA) variation remain unclear. The initial peopling by Palaeolithic hunter-gatherers ~42,000 years ago and the immigration of Neolithic farmers into Europe ~8000 years ago appear to have played important roles but do not explain present-day mtDNA diversity. We generated mtDNA profiles of 364 individuals from prehistoric cultures in Central Europe to perform a chronological study, spanning the Early Neolithic to the Early Bronze Age (5500 to 1550 calibrated years before the common era). We used this transect through time to identify four marked shifts in genetic composition during the Neolithic period, revealing a key role for Late Neolithic cultures in shaping modern Central European genetic diversity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4039305/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4039305/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brandt, Guido -- Haak, Wolfgang -- Adler, Christina J -- Roth, Christina -- Szecsenyi-Nagy, Anna -- Karimnia, Sarah -- Moller-Rieker, Sabine -- Meller, Harald -- Ganslmeier, Robert -- Friederich, Susanne -- Dresely, Veit -- Nicklisch, Nicole -- Pickrell, Joseph K -- Sirocko, Frank -- Reich, David -- Cooper, Alan -- Alt, Kurt W -- Genographic Consortium -- R01 GM100233/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2013 Oct 11;342(6155):257-61. doi: 10.1126/science.1241844.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Anthropology, Johannes Gutenberg University of Mainz, Mainz, Germany. brandtg@uni-mainz.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24115443" target="_blank"〉PubMed〈/a〉

Description: Daily NO number density, retrieved from measurements of the SCanning Imaging Absorption Spectrometer for Atmospheric CHartographY (SCIAMACHY) from 2002-2012 for polar summer in the mesosphere, are used to investigate the response of NO to geomagnetic activity, as expressed by the Aurora Electrojet (AE) index. Applying the superposed epoch analysis, we observe a clear response of NO to strong geomagnetic forcing at geomagnetic latitudes 55-75 ∘ N/S and altitudes above 66 km. The 27-day solar rotation cycle is observed, indicating that some of the observed geomagnetic events are related to solar coronal holes. We find a linear relationship between anomalies of AE and NO at geomagnetic latitudes 55-70 ∘ N/S and 70-74 km altitude. A clear auroral oval-like structure is observed on days of strong geomagnetic forcing in both hemispheres, with small longitudinal inhomogeneities, which might be related to the South Atlantic Anomaly or the magnetic local time. The NO lifetime and production rate per AE anomaly has been derived from a least-squares fit to the observations. Comparisons of results from a simple model using this empirical NO production and a lifetime varying from 1.2 days in summer to 10 days in winter to SCIAMACHY observations show good agreement. In particular, the strength and interannual variability of the wintertime maximum is well captured. This suggests that direct production of NO in the upper mesosphere above 72 km contributes substantially to the so-called energetic particle precipitation (EPP) indirect effect .

Description: The later Wittgenstein’s perspective on mathematical sentences as norms is motivated for sentences belonging to Hilbertian axiomatic systems where the axioms are treated as implicit definitions. It is shown that in this approach the axioms are employed as norms in that they function as standards of what counts as using the concepts involved. This normative dimension of their mode of use, it is argued, is inherited by the theorems derived from them. Having been motivated along these lines, Wittgenstein’s perspective on mathematical language may appeal also to those who are not friends of or experts on Wittgenstein’s later philosophy of mathematics.

Description: Present-day domestic horses are immensely diverse in their maternally inherited mitochondrial DNA, yet they show very little variation on their paternally inherited Y chromosome. Although it has recently been shown that Y chromosomal diversity in domestic horses was higher at least until the Iron Age, when and why this diversity disappeared remain controversial questions. We genotyped 16 recently discovered Y chromosomal single-nucleotide polymorphisms in 96 ancient Eurasian stallions spanning the early domestication stages (Copper and Bronze Age) to the Middle Ages. Using this Y chromosomal time series, which covers nearly the entire history of horse domestication, we reveal how Y chromosomal diversity changed over time. Our results also show that the lack of multiple stallion lineages in the extant domestic population is caused by neither a founder effect nor random demographic effects but instead is the result of artificial selection—initially during the Iron Age by nomadic people from the Eurasian steppes and later during the Roman period. Moreover, the modern domestic haplotype probably derived from another, already advantageous, haplotype, most likely after the beginning of the domestication. In line with recent findings indicating that the Przewalski and domestic horse lineages remained connected by gene flow after they diverged about 45,000 years ago, we present evidence for Y chromosomal introgression of Przewalski horses into the gene pool of European domestic horses at least until medieval times.