نتایج جستجو برای: factor contribution
تعداد نتایج: 1045088 فیلتر نتایج به سال:
امروزه، در بیشتر اراضی سرعت فرسایش خاک بیش از سرعت تشکیل خاک است. در نتیجه باعث تهی شدن منابع خاک و کاهش توانایی حاصلخیزی خاک می شود. در ایران استان گلستان به علت موقعیت جغرافیایی و اقلیمی آن و تخریب بالای منابع آن و همچنین به علت اینکه سطح وسیعی از اراضی از لس تشکیل شده دارای میزان فرسایش خاک بالایی می باشد. یکی از راه های تخمین میزان فرسایش و رسوب و بررسی میزان تلفات مواد غذایی خاک استفاده از...
background:the zinc-finger x linked (zfx) gene encodes a transcription factor that acts as a regulator of self-renewal of stem cells. due to the role of zfx in cell growth, understanding zfx protein-protein interactions helps to clarify its proper biological functions in signaling pathways. the aim of this study is to define zfx protein-protein interactions and the role of zfx in cell growth. m...
background : health policy makers are concerned about protecting people from catastrophic health expenditures and subsequent impoverishment. this study aimed to describe the magnitude and distribution of catastrophic health expenditures in kermanshah western iran. methods : in this descriptive study, during may 2008, 189 households were chosen by “systematic random sampling†among the commu...
the present study was conducted to determine the relative contribution of initial quality and compositional parameters to the rate of changes (rctpc) in the content of total polar compounds (tpc), which is considered to be one of the most reliable indicators of heated oils quality, of olive oil during continuous heating at 180 ºc. the ratio between monounsaturated and polyunsaturated fatty acid...
با توجه به اهمیتی که رودخانه ها در تأمین منابع آب بشر دارند، آگاهی از میزان رواناب و بار رسوبی که حمل می کنند می تواند بشر را در برنامه ریزی های آینده در منابع آب یاری نماید. امروزه، کاربرد روش های سیستمی به خاطر توانایی پردازش حجم بالایی از داده ها در مدت زمان کوتاه در برنامه ریزی منابع آب در حال افزایش می باشد. از آنجایی که مدل swat2009 یک مدل جامع و کامل جهت ارزیابی فرآیندهای هیدرولوژیک در س...
on the substantive and predictive validity facets of the university entrance exam for english majors
this study examined the substantive and predictive validity facets of the university entrance examination for english major (ueeem) students. to that aim, 111 english major students were recruited to report their scores on each of the subtests of the test as well as their grade point average. sequential multiple regressions and factor analysis were used in the analysis of the data. results ackn...
Fuel cells directly convert chemical energy into electrical power using electrochemical reactions. Solid oxide fuel cell (SOFC) is one of the high-temperature fuel cells that propose a promising future from the standpoint of power generation. In this study, optimization of an SOFC system is performed using Taguchi approach after verification of the model in compare with experimental results. Cu...
Background and Objectives: Spiritual intelligence makes a major contribution to people’s health and well-being. Since religion is considered as an enriched context for Muslim communities, which can provide them with spiritual experiences, the aim of this study was to develop and validate a questionnaire in order to assess spiritual intelligence among people in these communities. Methods: In th...
the impacts of total factor productivity (tfp) on the growth of the iran's main economy sectors
this study analyzes the contribution of the sectoral total factor productivity growth (tfpg) and the input's growth to the iran's economy sectors growth during 1345 -1383. the major findings show that the average contribution of tfp growth to non-oil output's growth during first, second and third development plans has been 39.5%, 12.2% and 24.8% respectively, amounting to (as est...
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