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Demic Diffusion
Demic diffusion, as opposed to trans-cultural diffusion, is a demographic term referring to a migratory model, developed by Luigi Luca Cavalli-Sforza, of population diffusion into and across an area that had been previously uninhabited by that group and possibly but not necessarily displacing, replacing, or intermixing with an existing population (such as has been suggested for the spread of agriculture across Neolithic Europe and several other ''Landnahme'' events). In its original formulation, the demic diffusion model includes three phases: (1) population growth, prompted by new available resources as in the case of early farmers, and/or other technological developments; (2) a dispersal into regions with lower population density; (3) a limited initial admixture with the people encountered in the process. Evidence Theoretical work by Cavalli-Sforza showed that if admixture between expanding farmers and previously-resident groups of hunters and gatherers was not immediate, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Matrilineal Distances Between European Neolithic Linear Pottery Culture Populations (5,500–4,900 Calibrated BC) And Modern Western Eurasian Populations
Genetic may refer to: *Genetics, in biology, the science of genes, heredity, and the variation of organisms **Genetic, used as an adjective, refers to genes ***Genetic disorder, any disorder caused by a genetic mutation, whether inherited or de novo ***Genetic mutation, a change in a gene ****Heredity, genes and their mutations being passed from parents to offspring **Genetic recombination, refers to the recombining of alleles resulting in a new molecule of DNA *Genetic relationship (linguistics), in linguistics, a relationship between two languages with a common ancestor language *Genetic algorithm, in computer science, a kind of search technique modeled on evolutionary biology See also *Genetic memory (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guido Barbujani
Guido Barbujani (born 31 January 1955) is an Italian population geneticist, evolutionary biologist and literary author born in Adria, who has worked with the State University of New York at Stony Brook (NY), University of Padua, and University of Bologna. He has taught at the University of Ferrara since 1996. Works A population geneticist by training, Barbujani has been working on several aspects of human genetic variation. In collaboration with Robert R. Sokal, he pioneered the statistical comparison of patterns of genetic and linguistic variation, showing that language differences may contribute to reproductive isolation, and hence promote genetic divergence between populations. His analyses of geographic patterns of genetic variation in Europe support Luca Cavalli-Sforza's Neolithic demic diffusion model, or the idea that farming spread in the Neolithic mainly because farmers did, and not by cultural transmission. There are two implications of this finding: first, that mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wayne State University Press
Wayne State University Press (or WSU Press) is a university press that is part of Wayne State University Wayne State University (WSU) is a public university, public research university in Detroit, Michigan, United States. Founded in 1868, Wayne State consists of 13 schools and colleges offering approximately 375 programs. It is Michigan's third-l .... It publishes under its own name and also the imprints Painted Turtle and Great Lakes Books Series. History The Press has strong subject areas in Africana studies; fairy-tale and folklore studies; film, television, and media studies; Jewish studies; regional interest; and speech and language pathology. Wayne State University Press also publishes eleven academic journals, including ''Marvels & Tales'', and several trade publications, as well as the ''Made in Michigan Writers Series''. WSU Press is located in the Leonard N. Simons Building on Wayne State University's main campus. An editorial board approves the Wayne State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Biology
Human biology is an interdisciplinary area of academic study that examines humans through the influences and interplay of many diverse fields such as genetics, evolution, physiology, anatomy, epidemiology, anthropology, ecology, nutrition, population genetics, and sociocultural influences. It is closely related to the biomedical sciences, biological anthropology and other biological fields tying in various aspects of human functionality. It wasn't until the 20th century when biogerontologist, Raymond Pearl, founder of the journal '' Human Biology'', phrased the term "human biology" in a way to describe a separate subsection apart from biology. It is also a portmanteau term that describes all biological aspects of the human body, typically using the human body as a type organism for Mammalia, and in that context it is the basis for many undergraduate University degrees and modules. Most aspects of human biology are identical or very similar to general mammalian biology. In part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PNAS
''Proceedings of the National Academy of Sciences of the United States of America'' (often abbreviated ''PNAS'' or ''PNAS USA'') is a peer-reviewed multidisciplinary scientific journal. It is the official journal of the National Academy of Sciences, published since 1915, and publishes original research, scientific reviews, commentaries, and letters. According to '' Journal Citation Reports'', the journal has a 2022 impact factor of 9.4. ''PNAS'' is the second most cited scientific journal, with more than 1.9 million cumulative citations from 2008 to 2018. In the past, ''PNAS'' has been described variously as "prestigious", "sedate", "renowned" and "high impact". ''PNAS'' is a delayed open-access journal, with an embargo period of six months that can be bypassed for an author fee ( hybrid open access). Since September 2017, open access articles are published under a Creative Commons license. Since January 2019, ''PNAS'' has been online-only, although print issues are avail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craniometry
Craniometry is measurement of the cranium (the main part of the skull), usually the human cranium. It is a subset of cephalometry, measurement of the head, which in humans is a subset of anthropometry, measurement of the human body. It is distinct from phrenology, the pseudoscience that tried to link personality and character to head shape, and physiognomy, which tried the same for facial features. Today, physical and forensic anthropologists use craniometry to study the evolution of human populations, determining the origin of ancient remains such as the Kennewick Man. There is a rift between forensic and biological anthropologists in the use of race in craniometry, with biological anthropologists attempting to disprove any theory of biological race, compared to how many forensic anthropologists make inquiries based on societally-created racial categories. It was once intensively practised in physical anthropology in the 19th and the first part of the 20th century. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near East
The Near East () is a transcontinental region around the Eastern Mediterranean encompassing the historical Fertile Crescent, the Levant, Anatolia, Egypt, Mesopotamia, and coastal areas of the Arabian Peninsula. The term was invented in the 20th century by modern Western geographers and was originally applied to the Ottoman Empire, but today has varying definitions within different academic circles. The term ''Near East'' was used in conjunction with the ''Middle East'' and the ''Far East'' (China and beyond), together known as the "three Easts"; it was a separate term from the ''Middle East'' during earlier times and official British usage. As of 2024, both terms are used interchangeably by politicians and news reporters to refer to the same region. ''Near East'' and ''Middle East'' are both Eurocentrism, Eurocentric terms. According to the National Geographic Society, the terms ''Near East'' and ''Middle East'' denote the same territories and are "generally accepted as comprisin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fertile Crescent
The Fertile Crescent () is a crescent-shaped region in the Middle East, spanning modern-day Iraq, Israel, Jordan, Lebanon, Palestine, and Syria, together with northern Kuwait, south-eastern Turkey, and western Iran. Some authors also include Cyprus and northern Egypt. The Fertile Crescent is believed to be the first region where agriculture, settled farming emerged as people started the process of clearance and modification of natural vegetation to grow newly domesticated plants as crops. Early human civilizations such as Sumer in Prehistory of Mesopotamia, Mesopotamia flourished as a result. Technological advances in the region include the Origins of agriculture in West Asia, development of agriculture and the use of Irrigation#History, irrigation, of History of writing#Bronze Age writing, writing, the Wheel#History, wheel, and history of glass, glass, most emerging first in Mesopotamia. Terminology The term "Fertile Crescent" was popularized by archaeologist James Henry Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lounès Chikhi
Lounès Chikhi (born Paris, France) is a French population geneticist of Algerian Berber extraction, based at the Université Paul Sabatier in Toulouse, France, and also at the Instituto Gulbenkian de Ciência in Oeiras, Portugal, where he runs thPopulation and Conservation Genetics Group Scientific career Chikhi is notable for leading a number of population genetics studies on the origins and demographic history of various of human populations – including Europeans and the peoples of Japan – and on the conservation genetics of various primate species. He has published a number of influential scientific papers in defense of model-based inference of population history and raising concerns about incautious used of interpretative phylogeography in making inferences on human population demographic history. He is also involved in conservation projects in northern Borneo and Madagascar Madagascar, officially the Republic of Madagascar, is an island country th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert R
Robert Lee Rayford (February 3, 1953 – May 15, 1969), sometimes identified as Robert R. due to his age, was an American teenager from Missouri who has been suggested to represent the earliest confirmed case of HIV/AIDS in North America. This is based on evidence published in 1988 in which the authors claimed that medical evidence indicated that he was "infected with a virus closely related or identical to human immunodeficiency virus type 1." Rayford died of pneumonia, but his other symptoms baffled the doctors who treated him. A study published in 1988 reported the detection of antibodies against HIV. Results of testing for HIV genetic material were reported at a scientific conference in Australia in 1999. However, the data has never been published in a peer-reviewed medical or scientific journal. No photos of Rayford are known to exist. Background Robert Rayford was born on February 3, 1953, in St. Louis, Missouri. As a single parent, his mother Constance had to rais ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-cultural Diffusion
In cultural anthropology and cultural geography, cultural diffusion, as conceptualized by Leo Frobenius in his 1897/98 publication ''Der westafrikanische Kulturkreis'', is the spread of culture, cultural items—such as ideas, fashion, styles, religions, technology, technologies, contact linguistics, languages—between individuals, whether within a single culture or from one culture to another. It is distinct from the diffusion of innovations within a specific culture. Examples of diffusion include the spread of the war chariot and iron smelting in ancient times, and the use of automobiles and Western business suits in the 20th century. Types Five major types of cultural diffusion have been defined: * Expansion diffusion: an innovation or idea that develops in a source area and remains strong there, while also spreading outward to other areas. This can include hierarchical, stimulus, and contagious diffusion. * Relocation diffusion: an idea or innovation that migrates into new are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical Migration
:'' This article focusses on prehistorical migration since the Neolithic period until AD 1800. See Early human migrations for migration prior to the Neolithic, History of human migration for modern history, and human migration for contemporary migration.'' Paleolithic migration prior to end of the Last Glacial Maximum spread anatomically modern humans throughout Afro-Eurasia and to the Americas. During the Holocene climatic optimum, formerly isolated populations began to move and merge, giving rise to the pre-modern distribution of the world's major language families. In the wake of the population movements of the Mesolithic came the Neolithic Revolution, followed by the Indo-European expansion in Eurasia and the Bantu expansion in Africa. Population movements of the proto-historical or early historical period include the Migration period, followed by (or connected to) the Slavic, Magyar, Norse, Turkic and Mongol expansions of the medieval period. The last world regions t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
