توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Material Planning for a Multi–Products System Under TOC
نویسنده(ها): ،
اطلاعات انتشار: اولین کنفرانس ملی مهندسی صنایع، سال
تعداد صفحات: ۱۶
OPT is a promising approach with a simple goal: to make money. Implementing its rules for large–scale firms or those involving complicated process is not easy task. This paper, using the simulation tool, has studied this issue and developed four executive rules. These rules are based on investigation of several simulation models.<\div>

۲A statistical model for road traffic noise
نویسنده(ها): ، ، ،
اطلاعات انتشار: نخستین کنفرانس بین المللی ارگونومی ایران، سال
تعداد صفحات: ۹
Background: The recognition of road traffic noise as one of the main sources of environmental pollution has led to develop models that enable to predict noise level from fundamental variables. Traffic noise prediction models are required as aids for designing roads and highways. In addition, sometimes are used in the assessment of existing or envisaged changes in traffic noise conditions. In this paper a statistical modelling approach has been used for predicting road traffic noise in Iranian road conditions.
Methods: The study was performed during 2005–2006 in Hamadan city, in the west of Iran. The data set consisted of 282 noise measurements. The entire data set was utilized to develop a new model for Iranian condition using regression analysis. Result: The developed model has twelve explanatory variables in order to achieve a proper fit for measured values of Leq (r2= 0.913). Conclusion: The proposed road traffic noise model can be effectively used as a decision support tools for prediction of traffic noise index of Leq (30min), in Iran's cities.<\div>

۳Improving Rural Regions Environment by Establishing and Maintaining Parks and Role of Extension Education Factors (Case Study: Isfahan province–Iran),
نویسنده(ها): ، ، ،
اطلاعات انتشار: Caspian Journal of Environmental Sciences، هشتم،شماره۱، ۲۰۱۰، سال
تعداد صفحات: ۸
Nowadays the growth of deserts is one the most important problems in Iran. This phenomenon has many reasons such as growth of population, global changes in the climates and many undesirable consequences such as the erosion of agricultural soils and immigration of rural people to urban regions mainly to the capital of Iran, Tehran. Isfahan province is one of the semi–arid and desert regions in the center of Iran. It is the first province in Iran that has made rural parks in its arid and semi–arid rural regions. As the successful experiences of developing and developed countries shows, the main instrument to achieve people\''s successful participation in rural development is efforts for planning and operating extension education projects. The purpose of this paper is to examine and study the role of extension education factors in persuading rural people to participate for establishing and maintaining rural parks in order to decrease desert generation, improve ecosystems and reduce immigration from rural regions in Isfahan province .The type of the research is mixed – qualitative and quantitative– methods. The findings of the research, reveals meaningful relationships between educational and demographic characteristics of extension education employees responsible in rural parks of Isfahan, and achievements in their works. There are also meaningful relationships among age, number of children, quantity of education, quality and distance of rural parks from villages and quantity and quality of using the villagers in establishing and maintaining rural parks. As a whole, the findings of the research prove that to take into account the extension education factors has a major role in establishing and maintaining rural parks and is essential in increasing the efficiency of the similar rural development projects in Iran.

۴Lethal and sublethal effects of endosulfan, imidacloprid and indoxacarb on first instar larvae of Chrysoperla carnea (Neu.: Chrysopidae) under laboratory conditions
نویسنده(ها): ، ، ، ، ، ،
اطلاعات انتشار: Journal of Entomological Society of Iran، بيست و هشتم،شماره۲،، سال
تعداد صفحات: ۱۱
The common green lacewing is an important natural enemy used for pest control in greenhouses. It is also very common in many agricultural systems. Hence, studying lethal and sublethal effects of insecticides on this predator would be useful. Toxicity of endosulfan, imidacloprid and indoxacarb was assessed on 1st instar larvae of Chrysoperla carnea (Stephens) in laboratory. Residual bioassays were carried out in glass Petri dishes. The LC50 values, for endosulfan, imidacloprid and indoxacarb were estimated 251, 24.6 and 133 mg ai\l, respectively. Imidacloprid was the most toxic among insecticides tested. To assess the sublethal effects, the 1st instars were treated with LC25 of each insecticide. Thereafter, these effects were studied using fertility life table experiments. The analysis of variance revealed significant difference between treatments and control with respect to developmental time of the 1st instar larvae. However, no significant difference was observed among endosulfan, imidacloprid and indoxacarb treatments considering the larval developmental time. Differences between treatments and control were not significant for the developmental time of the 2nd and 3rd instars, pupae, sex ratio, adult longevity, and adult fertility. The results showed that only net reproduction rate (R0) was significantly affected by treatments. The gross reproductive rate (GRR), intrinsic rate of increase (rm), doubling time (DT), mean generation time (T) and finite rate of increase (λ) were not affected. The highest and the lowest amounts of rm were 0.178 and 0.169 in control and indoxacarb, respectively. Imidacloprid was the most toxic of the insecticides tested on the 1st instar followed by indoxacarb and endosulfan. If results similar to laboratory findings are obtained in field conditions, these insecticides might be appropriate candidates for IPM programs.
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