نتایج جستجو برای: anthropologic researches since mid
تعداد نتایج: 585605 فیلتر نتایج به سال:
Abstract When the modern-like geomorphology and climate pattern of Himalaya-Tibetan Plateau were established still remains unclear. In this study, we apply paired stable isotope compositions carbonate (δ18Oc) leaf waxderived n-alkanes (δ2Halk) from upper Gazhacun Formation in Namling Basin to reconstruct middle Miocene elevation southern Tibet. Depositional age has been precisely constrained be...
Eolian loess deposits contain valuable information about past climate changes and erosion history in dust source regions. In contrast to the extensive investigations of paleoclimatic implications Eurasian loess, continental has received less attention, particularly on global or hemispheric scales. The present study combines citrate-bicarbonate-dithionite (CBD) magnetic mineral extraction proced...
Climatic conditions have dried up since the late 5th millennium BC as if Paleoclimate research in the northern hemisphere, particularly Iran and neighboring countries, shows unfavorable climatic conditions and several periods of severe drought during 4th millennium BC. Also, based on environmental sedimentological studies on archaeological sites such as Mafin Abad of Islamshahr and Meymanat Aba...
What are the mechanisms by which behavior is organized sequentially over time? The recently developed mid-session reversal (MSR) task offers new insights into this fundamental question. The typical MSR task is arranged to have a single reversed discrimination occurring in a consistent location within each session and across sessions. In this task, we examine the relevance of time, reinforcement...
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