نتایج جستجو برای: 2 over the sahara globally
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boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...
BACKGROUND Pastoral social-ecological systems (SESs) are adaptive and complex systems rooted in the extensive exploitation of forage plants for livestock-based livelihoods and culture. There are species and relations that are foundational to the existence of these SESs. Nucularia perrinii Batt. (Chenopodiaceae) is an endemic halophyte plant of central and western Sahara seldom cited in the scie...
according to coates’s (2004, as cited in zhang, 2010) definition of "conversational dominance" (p.111), it refers to the phenomenon of a speaker dominating others in interaction. specifically, it means how a speaker makes use of certain strategies to get the floor and maintain the floor. thus, the amount of talk is the main measurement for the dominance of the conversation. whether a speaker do...
نهضت مشروطه که برخی از آن به انقلاب مشروطه نیز یاد می کنند، اتفاقی است که در اواخر دوران 151 ساله حکومت قاجار در ایران روی داد و روند حکومت را که تا پیش از آن بر اساس تفکر فردی و استبدادی و سلطه پادشاه بر کشور حاکم بود، به روندی قانونی تبدیل کرد هر چند این روند دیری نپایید و دوباره حتی با وجود قانون، استبداد فردی بر کشور سایه افکند و برای دهها سال دیگر ایران را زیر سلطه خاندانهای مستبد نگه داشت...
Proxy reconstructions from the mid-Holocene (MH: 6,000 years ago) indicate an intensification of West African Monsoon and a weakening South American Monsoon, primarily resulting orbitally-driven insolation changes. However, model studies that account for MH orbital configurations greenhouse gas concentrations can only partially reproduce these Most do not remarkable vegetation changes occurred ...
Introduction: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spilled over to humans via wild mammals, entering the host cell using angiotensin-converting enzyme 2 (ACE2) as receptor through Spike (S) protein binding. While SARS-CoV-2 became fully adapted to humans and globally spread, some mammal species were infected back. The present study evaluated the potential risk of mammals...
It is widely accepted that modern humans originated in sub-Saharan Africa approximately 150-200 thousand years ago (ka), but their route of dispersal across the currently hyperarid Sahara remains controversial. Given that the first modern humans north of the Sahara are found in the Levant approximately 120-90 ka, northward dispersal likely occurred during a humid episode in the Sahara within Ma...
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