نتایج جستجو برای: critical zones
تعداد نتایج: 523953 فیلتر نتایج به سال:
Assessing sulfate concentration levels and their distributions within road alignments is crucial for the design of highway projects. Sulfate minerals in soils react with calcium-based additives, leading to sulfate-induced heaving pavement failures. However, a reasonable assessment extent using current practices, such as conventional laboratory-based methods, still challenging because spatial he...
Integration of repulsive guidance cues generates avascular zones that shape mammalian blood vessels.
RATIONALE Positive signals, such as vascular endothelial growth factor, direct endothelial cells (ECs) to specific locations during blood vessel formation. Less is known about repulsive signal contribution to shaping vessels. Recently, "neuronal guidance cues" have been shown to influence EC behavior, particularly in directing sprouting angiogenesis by repelling ECs. However, their role during ...
Bee keeping is indispensable to global food production. It is an alternate income source, especially in rural underdeveloped African settlements, and an important forest conservation incentive. However, dwindling honeybee colonies around the world are attributed to pests and diseases whose spatial distribution and influences are not well established. In this study, we used remotely sensed data ...
Introduction According to the theoretical frameworks in the spatial analysis, every "structure" in space has a specific "function". To study phenomena and to identify the relationships between them, these two concepts are of particular importance, especially in the "structural-functional dynamism" approach. The basic premise of this approach is based on the existence of a link between the stru...
the major aim of this study was to investigate the relationship between social and cultural capital and efl students’ critical thinking skills. this study takes this relationship in to account to see if people with different sociocultural status are different regarding their critical thinking skills. to this end, 160 university students majoring in english language and literature, english trans...
Thermo-Elasto-Plastic analyses of thick-walled spherical tanks made of functionally graded materials are investigated analytically. These tanks are subjected to positive or negative temperature gradient and internal pressure loadings separately or simultaneously. The power law modeling has been used for through-the-thickness variation of mechanical properties. von Mises yield criterion and Elas...
Economic aspects of possible land use strategies and protection measures in coastal zones as a response to global environmental change are examined. First, some key elements are mentioned that are of critical importance for water and land management in coastal zones. Next, various socio-economic repercussions are discussed. In this context, research needs will be addressed. Subsequently, these ...
The seismic performance of a structural frame system can be enhanced by strengthening the RC beams’ critical zones. In this paper is presented an experimental study on improvement beam behaviour, subjected to alternative cyclic procedure which considers gravity loads reflecting real demands zone. Two solutions are presented: unbounded post-tension (PT) tendon increase resistance and limit resid...
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