منابع مشابه
Much More than a Piece of Paper
In Autumn 2004, HSE will launch a quarterly on-line newsletter ‘Science and Research Outlook,’ providing information on the breadth of HSE’s science and engineering activities. Science and Research Outlook will replace the existing HSE quarterly science newsletters, Mainstream Research News and Offshore Research Focus. Users of the newsletter’s interactive website will be able to search and pri...
متن کاملJust a piece of paper? The effect of marriage on health∗
There is extensive evidence that married people are, on average, healthier than their unmarried counterparts. It is unclear how much this positive correlation can be explained by the selection of healthier people into marriage. In this paper, I estimate the effect of marriage relative to cohabitation on health and disability. I control for selection into marriage by instrumenting marital status...
متن کاملA piece of cake.
I n the past year or so, I have devoted a lot of time to compiling manuscripts that incorporate outputs from genome-wide screens or profiles, which has required a lot of manual inspection of database entries. While those who work in computational biology may groan and advise me to let data-mining tools do the work—and do it more accurately, comprehensively, and objectively—I feel I have learned...
متن کاملdegradation of oil impregnated paper insulation under influence of repetitive fast high voltage impulses
در طی سالهای اخیراستفاده ازمنابع انرژی تجدید پذیر در شبکه های مدرن بنا به دلایل زیست محیطی و اقتصادی به طور گسترده استفاده شده است همچون نیروگاههای بادی و خورشیدی .ولتاژتولیدی این نیروگاهها اغلب به فرم dc می باشد وادوات الکترونیک قدرت به عنوان مبدل و پل بین شکل موج dc وac استفاده می شوند.این پروسه باعث ایجاد پالسهایی برروی شکل موج خروجی می شود که می تواند وارد تجهیزات قدرت همچون ترانسفورماتور ی...
15 صفحه اولTorque Removal Evaluation of Screw in One-Piece and Two-Piece Abutments Tightened with a Handheld screwdriver
Introduction: Some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. The aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. Methods: 40 ITI implants were placed in acrylic blocks and divided into 4 groups. In groups one and two, 10 ITI one...
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ژورنال
عنوان ژورنال: American Journal of Public Health and the Nations Health
سال: 1953
ISSN: 0002-9572
DOI: 10.2105/ajph.43.3.360-a