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The Effect of Schooling and Ability on Achievement Test Scores This paper develops two methods for estimating the effect of schooling on achievement test scores that control for the endogeneity of schooling by postulating that both schooling and test scores are generated by a common unobserved latent ability. These methods are applied to data on schooling and test scores. Estimates from the two...
Iron is an essential nutrient for the growth of most bacteria. To obtain iron, bacteria have developed specific iron-transport systems located on the membrane surface to uptake iron and iron complexes such as ferrichrome. Interference with the iron-acquisition systems should be therefore an efficient strategy to suppress bacterial growth and infection. Based on the chemical similarity of iron a...
abstract this mixed method study examines whether there is any relationship among the variables of the study (job satisfaction, social capital and motivation). the researcher considered job satisfaction and social capital as independent variables; motivation is the dependent variable of the study. the researcher applied a questionnaire to assess each variable. to measure efl teachers’ job sati...
BACKGROUND Although exercise-induced ST depression is an independent predictor of future coronary events in asymptomatic populations, the predictive value of ST depression beginning after exercise cessation is unknown. METHODS AND RESULTS We analyzed the treadmill exercise tests of 825 healthy volunteers who were 22 to 89 years of age from the Baltimore Longitudinal Study of Aging. All subjec...
Michael Ghil, Mickaël D. Chekroun and Dmitri Kondrashov Dept. of Atmospheric & Oceanic Sciences and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 603 Charles E. Young Dr., East, 3845 Slichter Hall Los Angeles, CA 90095-1567 Ghil phone: (310) 825-1038 fax: (310) 206-5219 email:[email protected] Chekroun phone: (310) 825-1038 fax: (310) 206-5219 email:...
1.1 Markov Processes Consider a set of states S1, S2, . . . SN . A discrete Markov process is one in which the system is in a particular state at any given time. The state can be changed only at discrete intervals of time. We denote the time instants associated with state changes with as t = 1, 2, . . . and we denote the actual state at time t as qt. The current state in an n-order Markov proce...
BACKGROUND Personal mobile phones and other personal communication devices (smartphones and tablet computers) provide users with an ever-increasing number and diversity of non-work-related activities while at work. In hospitals, where the vigilance of health care workers is essential for patient care, the potential distraction of these devices could be hazardous to patients. OBJECTIVE The obj...
هدف پژوهش حاضر تعیین کیفیّت مندرجات چکیده های فارسی پایان نامه های کارشناسی ارشد دانشکده های علوم انسانی و علوم اجتماعی دانشگاه شهید چمران از طریق بررسی و مقایسه آن ها با استاندارد بین المللی چکیده نویسی ایزو 214، به منظور ارائه دستورالعملی کاربردی است. در این پژوهش از روش های سندی، تحلیل محتوا و پیمایشی استفاده شده است. جامعه مورد مطالعه در این پژوهش را، چکیده های فارسی پایان نامه های کارشناسی ...
Michael Ghil, Mickaël D. Chekroun and Dmitri Kondrashov Dept. of Atmospheric & Oceanic Sciences and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 603 Charles E. Young Dr., East, 3845 Slichter Hall Los Angeles, CA 90095-1567 Ghil phone: (310) 825-1038 fax: (310) 206-5219 email:[email protected] Chekroun phone: (310) 825-1038 fax: (310) 206-5219 email:...
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