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ناخالصی ­های پلاسما یکی از عوامل اتلاف انرژی محصور شده در توکامک‌­ها به شمار می‌­روند که این منظر مطالعه و بررسی آن­ها راستای حفظ پایداری پلاسمای توکامک بهبود کیفیت محصورسازی امری ضروری خواهد بود. کار تحقیقاتی منظور ناخالصی‌­های دماوند، تکفام­‌ساز نوری موجود آزمایشگاه دماوند همراه یک آرایه خطی CCD ساختار طیف‌سنج نور مریی گرفته شد. سامانه طیف‌­سنج جدید توسط طول موج­‌های مشخصه لامپ جیوه کالیبره ر...

background: multiple sclerosis (ms) is one of the progressive and chronic disorders that cause damage in myelin of the central nervous system (cns) and spinal cord. it therefore results in some complications in patients. physical impairments and psychological changes can affect ms patients' self-esteem and quality of life. this study was designed to measure the quality of life in ms patients li...

The paper tests for external effects of local economic activity on consumption and income growth at the farm household level using panel data from four provinces of post-reform rural China. The tests allow for nonstationary fixed effects in the consumption growth process. Evidence is found of geographic externalities, stemming from spillover effects of the level and composition of local economi...

The relationship between research and practice in ergonomics and human factors has rarely been addressed in the literature. This presents specific problems for researchers when seeking to relate their work to the research community. Equally, practitioners are often frustrated by the lack of appropriate research to meet their needs. This paper seeks to identify current drivers for ergonomics res...

Labor Market Assimilation and the Self-Employment Decision of Immigrant Entrepreneurs This paper uses data from the 1980 and 1990 U.S. Censuses to study labor market assimilation of self-employed immigrants. Separate earnings functions for the self-employed and wage/salary workers are estimated. To control for endogenous sorting into the sectors, models of the self-employment decision are estim...