نتایج جستجو برای: hazard control
تعداد نتایج: 1386474 فیلتر نتایج به سال:
Kualitas udara dalam ruangan dengan bersih sebagai salah satu faktor dasar dapat diperoleh ventilasi yang memadai. Penggunaan mesin dilengkapi bio filter akan meningkatkan pengendalian polutan biologis. Mesin mekanik dibuat berukuran 32 cm x 3,25 60 menggunakan exhaust fan bertegangan 220 Volt, frekuensi 50Hz, putaran motor 1250 RPM, volume angin (CFM) speed keluar 450 CFM suhu 25 OC, 2 AC cabi...
The safety of a food product depends upon the control of hazards that cause adverse health effects. Hazard control is accomplished by the use of a combination of properly operating control measures. When designing or revising a food safety system for a product or product group, it is essential to determine that the set of control measures are, indeed, effective in controlling the hazard to the ...
BACKGROUND We wanted to evaluate the impact of nonblinded outcome assessors on estimated treatment effects in time-to-event trials. METHODS Systematic review of randomized clinical trials with both blinded and nonblinded assessors of the same time-to-event outcome. Two authors agreed on inclusion of trials and outcomes. We compared hazard ratios based on nonblinded and blinded assessments. A ...
BACKGROUND This study is a cost-benefit analysis that quantifies the social and economic benefits to household lead paint hazard control compared with the investments needed to minimize exposure to these hazards. OBJECTIVES This research updates estimates of elevated blood lead levels among a cohort of children < or = 6 years of age and compiles recent research to determine a range of the cos...
in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
this exploratory study aimed to investigate a possible relationship between learners’ beliefs about language learning and one of their personality traits; that is,locus of control (loc). both variables, beliefs and locus of control, are assumed to influence the language learning process. the internal control index (ici) and the beliefs about language learning inventory (balli) were administered...
The case-crossover design was developed in the early 1990s to study the effects of transient, short-term exposures on the risk of acute events such as myocardial infarction. To estimate relative risk, the exposure frequency during a period just before outcome onset (hazard period) is compared with exposure frequency during control time(s) in that person rather than in a control. One or more "co...
Abstract background and aims: Nowadays the growing complexity of technology and industry has led to vast changes over the last few decades. These changes, in addition to their positive and valuable effects, have also caused industrial accidents affecting human life and the environment. According to the ILO 2011 report, there are 340 million annual workplace accidents and 160 million occupation...
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