نتایج جستجو برای: ecological systems

تعداد نتایج: 1270098  

Journal: :Proceedings of the National Academy of Sciences 2010

Journal: :The Journal of the Korea Contents Association 2015

2006
L. A. Jackson Y. Zhao H. E. Fitzgerald

The Children and Technology Project, funded by the National Science Foundation, is designed to address the broad question “How does children’s use of Information Technology (IT) influence their cognitive, social, psychological and moral development?” Based on an ecological systems theory perspective, IT use is conceptualized as a reciprocal proximal process that occurs over time and is embedded...

Journal: :Bio Systems 2008
Matthew M. Yarrow Stanley N. Salthe

Ecological boundaries have been described as being multiscalar or hierarchical entities. However, the concept of the ecological boundary has not been explicitly examined in the context of hierarchy theory. We explore how ecological boundaries might be envisioned as constituents of scalar hierarchical systems. Boundaries may be represented by the surfaces of constituents or as constituents thems...

Journal: :محیط زیست طبیعی 0
علی عسگریان دانشجوی کارشناسی ارشد، رشتۀ منابع طبیعی ـ محیط زیست، دانشگاه تهران بهمن جباریان امیری استادیار دانشکدۀ منابع طبیعی ـ گروه محیط زیست، دانشگاه تهران

development of remote sensing (rs) and gis techniques and that of landscape metrics in the late 1980s have caused to introduce a new dimension in the landscape ecology arena (the relationship between spatial patterns and ecological processes). however, scale dependence of some of landscape metrics and rs systems of different spatial resolution has resulted in particular attention into selection...

Journal: :Language Teaching 2022

“Context” has been increasingly featured and acknowledged in second language (L2) research because L2 teaching is recognised to be shaped by the environments which it situated. Numerous theoretical perspectives were introduced that aim capture contextual forces at work learning, including but not limited Activity Theory, Complexity Sociocultural Theory. Theory holds a learner's motives (human n...

2006
Kerry L. Marsh Michael J. Richardson Reuben M. Baron

How and why the presence of a person directly affects the perception and action of another person is a phenomenon that has been approached in a limited and piecemeal fashion within psychology. This kind of diffuse strategy has failed to capture the jointness of perception and action within and between people. In contradistinction, the authors offer a perspective that retains both integrally soc...

Soil moisture is an important variable in climatic, hydrological, and ecological systems that link atmospheric processes to the earth's surface. The rainfall systems of the water year 2017-2018 abnormally caused more than normal rainfall in Fars province and caused major changes in the surface moisture of the soil. The purpose of this research is to analyze the spatial changes of soil moisture ...

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