نتایج جستجو برای: environment and conservation of natural resources

تعداد نتایج: 24112658  

Protected areas have emerged as one of the most important and effective tools in the world for biodiversity conservation. Changing the use of natural lands, especially rangelands to protected areas, causes livestock grazing to be restricted in some of the grazing lands. These restrictions cause conflict between different natural land stakeholders. This study investigates the grazing management ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

Journal: :International Journal of Research -GRANTHAALAYAH 2015

In this research, the effect of religiosity on participation in the production of public goods and preservation of natural resources has been investigated. Extraction of participation data and conservation of natural resource has been done through the implementation of online laboratory of public goods and natural resource games. To extract the three dimensions of religiosity (belief, rituals a...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
سید رضا اسحاقی دانشجوی کارشناسی ارشد ترویج کشاورزی دانشگاه تهران روح اله رضایی استادیار گروه ترویج و آموزش کشاورزی دانشگاه زنجان یوسف حجازی استاد ترویج کشاورزی دانشگاه تهران نعمت اله شیری دانشجوی دکتری ترویج و آموزش کشاورزی پردیس کشاورزی و منابع طبیعی کرمانشاه سیدعلیرضا قدیمی دانشجوی کارشناسی ارشد توسعۀ روستایی دانشگاه تهران

the main purpose of this research was to analyze the factors affecting on rural people’s participation in the projects of natural resources conservation. the research method of the study was analytical- explanatory research. the statistical population of the study consisted of all the heads of households in rural district of azadlo in moghan township (n= 750). according to krejcie and morgan ta...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1375

this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...

J. Ghoddousi, M. Zarei, M.S. Mortazavi, S.M.R. Fatemi, Sh. Pour Ebrahim,

The economic growth of aquaculture and the dependence of a large growing population on coastal resources have led to coastal degradation and reduced resources. In this paper while realizing the potential capacities of the island systems,  the aquaculture activities of the island are specially discussed  in the framework of Integrated Coastal Zone Management (ICZM). Therefore, in this study, fir...

Journal: :International Journal of Research -GRANTHAALAYAH 2015

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه دریانوردی و علوم دریایی چابهار - دانشکده ادبیات و زبانهای خارجی 1390

abstract cooperative learning refers to small groups of learners working together as a team to solve a problem, complete a task, or accomplish a common goal. in a cooperative environment one’s success is directly related to the success of other members because the focus on the individual shifts towards the group. to test the effectiveness of the method, using jigsaw technique, a study was cond...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1389

run-out-table (rot) is located between last finishing stand and down coiler in a hot strip mill. as the hot steel strip passes from rot, water jets impact on it from top and bottom and strip temperature decreases approximately from 800-950 °c to 500-750°c. the temperature history that strip experience while passing through rot affects significantly the metallurgical and mechanical properties, s...

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