نتایج جستجو برای: fragile and unsustainable areas controlling green spaces changes process
تعداد نتایج: 17092338 فیلتر نتایج به سال:
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
introduction spatial studies as the main tools for the detailed study of all tangible and intangible aspects of regions have special ranks among all kinds of planning. the conformity of this organization with physical environment forms the spatial structure of which is usually observed as a distributed and isotropic spatial structure, focus and polar, unbalanced and haphazard, random and balanc...
The Tlemcen region is characterized by very diverse and steep areas exposed to gravity hazards, especially in high medium mountain areas. National Park was chosen for this study, the main objective of which map fragile close relation reduced vegetation cover due land-use changes forest fires. Multi-source data were used monitor land use/land (LULC)patterns study area between 1987 2017. methodol...
introduction according to available statistics, nearly half of the world population is living in cities and there is expectance of increasing in the coming decades. urban areas are the main centers of economic, social and political growth in every country that have prove itself as the most attractive places to build wealth, work, creativity and innovation. but these areas face with important ch...
Experts have found that natural environment could have positive impacts on patient’s treatment process. The impact of natural environment on mental state and lowering the stress level of the patients is undeniable. In this study, the impacts of natural environment on patient women in Tehran general hospitals were investigated. After conducting a topical study of the issue on hand, using fiel...
Aims & Backgrounds: The occurrence of earthquakes in urban areas, have destructive effects, and the inhabitants are increasingly suffering from their harmful impacts. It appears that preparing proactive planning before the disaster occurrence, may reduce damages, casualties and financial losses. This paper aims to identify the vulnerability of the physical fabric of Hashtgerd new town against a...
asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...
plagiarism in esl/efl learning contexts has been established as a dynamic and multi-layered phenomenon and has become a topic engaging many researchers in a heated debate in recent years. comparisons of student-generated texts with their source texts have shown that students rely on source texts in their writings and copying is a major strategy used by both l1 and l2 writers. in our country a...
the method of sampling unit was applied according to the importance of the park in urban landscape structure with the initial purpose of planning method to maximize environmental sustainability and recognizing the structural elements within the park. swot technique has been applied to analyze collected data and evaluate the strengths and weaknesses, opportunities and threats of affected areas. ...
given the critical role played by urban green spaces and the emergence of remote sensing as avaluable natural resource management tool, this study sought to identify trends in green spaces within thecontext of south africa’s transition period (1990 - 2000). using the city of port elizabeth as a case study, threesets of landsat - 5 thematic mapper images (1990, 1995 and 2000) were geo-processed,...
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