نتایج جستجو برای: paleo
تعداد نتایج: 2254 فیلتر نتایج به سال:
In a 1945 monograph, Hrdlička argued that, at 1,000 BP, Paleo-Aleut people on Umnak Island were replaced by NeoAleut groups moving west along the island chain. His argument was based on cranial measurements of skeletal remains from Chaluka Midden and mummified remains from Kagamil and Ship Rock burial caves. By the 1980s, researchers had concluded that the transition demonstrated by Hrdlička, f...
The Kets, an ethnic group in the Yenisei River basin, Russia, are considered the last nomadic hunter-gatherers of Siberia, and Ket language has no transparent affiliation with any language family. We investigated connections between the Kets and Siberian and North American populations, with emphasis on the Mal'ta and Paleo-Eskimo ancient genomes, using original data from 46 unrelated samples of...
Introduction Conclusions References
How sensitive is our climate system to CO2? This is a key issue in a world of rising greenhouse gas concentrations. Estimating the temperature sensitivity of the Earth to changes in atmospheric CO2 has therefore been the subject of intensive research. Yet, uncertainty in our knowledge of this sensitivity is still large—as expressed by the broad 2-4.5°C range of climate sensitivity (ΔT2x) estima...
Ranked lists are an essential methodology to succinctly summarize outstanding items, computed over database tables or crowdsourced in dedicated websites. In this work, we address the problem of reverse engineering top-k queries over a database, that is, given a relation R and a sample topk result list, our approach, named PALEO, aims at determining an SQL query that returns the provided input r...
The ecological impacts of anthropogenic activities on aquatic environments have led to the development of new methods of environmental monitoring (Cohen et al 1993, Kelly and Whitton 1995). Benthic algae represent a ubiquitous group of photosynthetic organisms that play a pivotal role in stream food webs but may also be used for observing long-term trends in community changes that can occur bec...
In order to study the distribution law of oil and gas above below regional mudstone caprocks damaged by fault in petroliferous basins, based on sealing mechanism degree during hydrocarbon accumulation period, paleo-juxtaposition thickness caprock was calculated determining paleo-fault throw faults paleo-thickness period. According relation between at known well points area caprock, maximum juxt...
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