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  • 1
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    Field-Induced Phase Transitions of Repulsive Spin-1 Bosons in Optical Lattices (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-03-10
    Description: Author(s): K. Rodríguez, A. Argüelles, A. K. Kolezhuk, L. Santos, and T. Vekua We study the phase diagram of repulsively interacting spin-1 bosons in optical lattices at unit filling, showing that an externally induced quadratic Zeeman effect may lead to a rich physics characterized by various phases and phase transitions. We find that the main properties of the system may be ... [Phys. Rev. Lett. 106, 105302] Published Wed Mar 09, 2011
    Keywords: Condensed Matter: Structure, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Earliest Pleistocene hominid cranial remains from Dmanisi, Republic of Georgia: taxonomy, geological setting, and age (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-05-12
    Description: Archaeological excavations at the site of Dmanisi in the Republic of Georgia have uncovered two partial early Pleistocene hominid crania. The new fossils consist of a relatively complete cranium and a second relatively complete calvaria from the same site and stratigraphic unit that yielded a hominid mandible in 1991. In contrast with the uncertain taxonomic affinity of the mandible, the new fossils are comparable in size and morphology with Homo ergaster from Koobi Fora, Kenya. Paleontological, archaeological, geochronological, and paleomagnetic data from Dmanisi all indicate an earliest Pleistocene age of about 1.7 million years ago, supporting correlation of the new specimens with the Koobi Fora fossils. The Dmanisi fossils, in contrast with Pleistocene hominids from Western Europe and Eastern Asia, show clear African affinity and may represent the species that first migrated out of Africa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gabunia, L -- Vekua, A -- Lordkipanidze, D -- Swisher, C C 3rd -- Ferring, R -- Justus, A -- Nioradze, M -- Tvalchrelidze, M -- Anton, S C -- Bosinski, G -- Joris, O -- Lumley, M A -- Majsuradze, G -- Mouskhelishvili, A -- New York, N.Y. -- Science. 2000 May 12;288(5468):1019-25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Republic of Georgia National Academy of Sciences, Tbilisi, 380007, Republic of Georgia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10807567" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Asia ; Emigration and Immigration ; Europe ; Female ; *Fossils ; Geologic Sediments ; Georgia (Republic) ; History, Ancient ; *Hominidae/anatomy & histology/classification ; Humans ; Male ; Paleodontology ; Skull/*anatomy & histology
    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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  • 3
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    A new skull of early Homo from Dmanisi, Georgia (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-07-06
    Description: Another hominid skull has been recovered at Dmanisi (Republic of Georgia) from the same strata in which hominid remains have been reported previously. The Dmanisi site dated to approximately 1.75 million years ago has now produced craniofacial portions of several hominid individuals, along with many well-preserved animal fossils and quantities of stone artifacts. Although there are certain anatomical differences among the Dmanisi specimens, the hominids do not clearly represent more than one taxon. We assign the new skull provisionally to Homo erectus (=ergaster). The Dmanisi specimens are the most primitive and small-brained fossils to be grouped with this species or any taxon linked unequivocally with genus Homo and also the ones most similar to the presumed habilis-like stem. We suggest that the ancestors of the Dmanisi population dispersed from Africa before the emergence of humans identified broadly with the H. erectus grade.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vekua, Abesalom -- Lordkipanidze, David -- Rightmire, G Philip -- Agusti, Jordi -- Ferring, Reid -- Maisuradze, Givi -- Mouskhelishvili, Alexander -- Nioradze, Medea -- De Leon, Marcia Ponce -- Tappen, Martha -- Tvalchrelidze, Merab -- Zollikofer, Christoph -- New York, N.Y. -- Science. 2002 Jul 5;297(5578):85-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Georgian State Museum, Georgian Academy of Sciences, 3 Purtseladze Street, Tbilisi 380007, Georgia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12098694" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Anthropology, Physical ; Brain/anatomy & histology ; Cephalometry ; Emigration and Immigration ; *Fossils ; Frontal Bone/anatomy & histology ; Geologic Sediments ; Georgia (Republic) ; *Hominidae/anatomy & histology/classification ; Humans ; Mandible/anatomy & histology ; Nasal Bone/anatomy & histology ; Orbit/anatomy & histology ; Parietal Bone/anatomy & histology ; Rodentia ; Skull/*anatomy & histology ; Temporal Bone/anatomy & histology ; Tooth
    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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