نتایج جستجو برای: direct exposure test
تعداد نتایج: 1473527 فیلتر نتایج به سال:
BACKGROUND A major impediment to the treatment of TB is a diagnostic process that requires multiple visits. Descriptions of patient costs associated with diagnosis use different protocols and are not comparable. METHODS We aimed to describe the direct costs incurred by adults attending TB diagnostic centres in four countries and factors associated with expenditure for diagnosis. Surveys of 22...
Constant suction direct shear test enables the understanding of failure mechanism in rainfallinduced landslides. It can be conducted using a conventional apparatus with some modifications. The constant is carried out two stages. In first stage, unsaturated soil specimen consolidated to target net normal stress and matric then sheared second stage. Matric usually controlled axis-translation prin...
Wildfires have increased in frequency and severity over the past two decades, threatening to undo substantial air quality improvements. We investigate relationship between wildfire smoke exposure learning outcomes across United States using standardized test scores from 2009–2016 for nearly 11,700 school districts satellite-derived estimates of daily exposure. Relative a year with no smoke, ave...
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