نتایج جستجو برای: duringthe past two decades

تعداد نتایج: 2666071  

Journal: :ICGA Journal 1997

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...

Journal: :Bulletin of the American Meteorological Society 2023

Abstract During the second half of twentieth century, West Antarctic Ice Sheet (WAIS) has undergone significant warming at more than twice global mean and thus is regarded as one most rapidly regions on Earth. However, a reversal this trend was observed in 1990s, resulting regional cooling. In particular, during 1999–2018, annual average surface air temperature had decreased statistically rate,...

Journal: :Han-gukbangjaehakoenonmunjip 2022

Analyzing the effects of forest fires on sediment dynamics is essential to establish effective mitigation measures reduce risk fire-related disasters, such as landslides, debris flows, and hyperconcentrated flows. The objective this study was investigate temporal trend in landslide occurrences after a fire based statistical data landslides recorded over past two decades. results suggested that ...

Journal: :Remote Sensing 2022

Soil erosion caused by water and wind is a complicated natural process that has been accelerated human activity. It results in increasing areas of land degradation, which further threaten the productive potential landscapes. Consistent continuous monitoring will help identify location, magnitude, trends soil erosion. This information can then be used to evaluate impact management practices info...

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