David Madsen

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Hunter-gatherer populations in greater northeast Asia experienced dramatic range expansions during the early Upper Paleolithic (45 22 ka) and the late Upper Paleolithic (18 10 ka), both of which led to intensive occupations of cold desert environments including the Mongolian Gobi and northwest China. Range contractions under the cold, arid extremes of the(More)
We synthesize palaeoclimate records from the mid-latitude arid Asian region dominated today by the Westerlies (‘‘arid central Asia’’ (ACA)) to evaluate spatial and temporal patterns of moisture changes during the Holocene. Sediment records from 11 lakes with reliable chronologies and robust proxies were selected to reconstruct moisture histories based on a(More)
Archeological research over the past several years has started to provide evidence relevant to understanding both the timing of and processes responsible for human colonization of the Tibetan Plateau. This harsh, high-elevation environment is known to exact a heavy demographic toll on recent migrants, and such costs likely erected a substantial(More)
David B. Madsen,1 Li Jingzen,2 Robert G. Elston,3 Xu Cheng,4 Robert L. Bettinger,3 Geng Kan,5 P. Jeff Brantingham,6 and Zhong Kan7 1Environmental Sciences, Utah Geological Survey, P.O. Box 146100, Salt Lake City, Utah 84114 2Ningxia Cultural Relics Bureau, No. 60 East Wenhua Street, Yinchuan, Ningxia 75004, People’s Republic of China 3Department of(More)
BACKGROUND Triple-reassortant (tr) viruses of human, avian, and swine origin, including H1N1, H1N2, and H3N2 subtypes, emerged in North American swine herds in 1998 and have become predominant. While sporadic human infections with classical influenza A (H1N1) and with tr-swine influenza viruses have been reported, relatively few have been documented in(More)
The Artemis microASAR is a flexible, robust SAR system built on the successful legacy of the BYU μSAR [1] [2] and other BYU SAR systems [3]. It is an LFM-CW SAR system designed for low-power operation on small, manned aircraft or UAVs. This paper describes the high-level methodology used in designing the microASAR system and contains a description of the(More)
The pre-Neolithic history of the Tibetan Plateau is virtually unknown. Test excavations of Late Paleolithic sites, described here, provide preliminary evidence that the initial occupation of the plateau’s extreme environments was by small groups of foragers probably traveling from lower elevation plateau margins. These foragers occupied very short-term(More)
Field investigations at Dugway Proving Ground in western Utah have produced new data on the chronology and human occupation of late Pleistocene and early Holocene lakes, rivers, and wetlands in the Lake Bonneville basin. We have classified paleo-river channels of these ages as “gravel channels” and “sand channels.” Gravel channels are straight to curved,(More)