نتایج جستجو برای: dating back at least four thousand years
تعداد نتایج: 4739960 فیلتر نتایج به سال:
Textiles are among the longest and most widespread technologies in human history, although poor preservation of perishable artifacts in Paleolithic and Neolithic contexts makes them difficult to unearth and has hampered study of their production and use. Here we report evidence of a plain-woven mat from the Tianluoshan site, Zhejiang, Eastern China. Phytolith and AMS dating from the mat and mod...
Very little is known about Neanderthal cultures, particularly early ones. Other than lithic implements and exceptional bone tools, very few artefacts have been preserved. While those that do remain include red and black pigments and burial sites, these indications of modernity are extremely sparse and few have been precisely dated, thus greatly limiting our knowledge of these predecessors of mo...
the present study aimed at exploring cognitions of iranian english teachers within the context of english for academic purposes (eap). to this end, the cognitions of two groups of eap teachers with respect to their pedagogical content knowledge (pck) and their sense of professional identity (pi) were probed. two language teachers and two content instructors who had at least five years of eap te...
BACKGROUND The two forms of white rhinoceros; northern and southern, have had contrasting conservation histories. The Northern form, once fairly numerous is now critically endangered, while the southern form has recovered from a few individuals to a population of a few thousand. Since their last taxonomic assessment over three decades ago, new material and analytical techniques have become avai...
the present study aims at identifying, classifying and analyzing collocation errors made by translators of the holy quran into english.findings indicated that collocationally the most acceptablt translation was done by ivring but the least appropriate one made by pickthall.
We report the first data set of atmospheric abundances for the following four perfluoroalkanes: n-decafluorobutane (n-C4F10), n-dodecafluoropentane (n-C5F12), n-tetradecafluorohexane (n-C6F14) and nhexadecafluoroheptane (n-C7F16). All four compounds could be detected and quantified in air samples from remote locations in the Southern Hemisphere (at Cape Grim, Tasmania, archived samples dating b...
Text categorization algorithms assign texts to predefined categories. The study of such algorithms has a rich history dating back at least forty years. In the last decade or so, the statistical approach has dominated the literature. The essential idea is to infer a text categorization algorithm from a set of labeled documents, i.e., documents with known category assignments. The algorithm, once...
I nterest in abnormal breathing after stroke has a long history dating back at least to the observations of John Cheyne in 1818. In recent years this interest has been reawakened by a number of publications on the relations between sleep disordered breathing (SDB) and stroke. These studies have been of two main types—those investigating the possible increased risk of stroke in individuals with ...
physical properties of four common iranian varieties of canola seeds (hyola, okapi, orient and slm) were evaluated as a function of their moisture contents. the average seed length and thousand seed mass varied linearly from 1.925 to 2.262 mm and from 3.06 to 4.84 g, respectively. the average diameter, geometric mean diameter, and sphericity varied non-linearly from 1.475 to 1.911 mm, 1.625 to ...
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