نتایج جستجو برای: field study
تعداد نتایج: 4539283 فیلتر نتایج به سال:
BACKGROUND This study is a part of the interdisciplinary project The Office Illness Project in Northern Sweden, which was initiated with a questionnaire study in late 1988. Previously published results from the project have shown that facial skin symptoms reported among visual display terminal (VDT) workers are associated with a number of exogenous factors. This part of the project investigated...
OBJECTIVE To establish the relative risk of progressive visual field loss in a sample of glaucomatous eyes enrolled in a prospective longitudinal study vs a matched sample of eyes not enrolled in a study. METHODS The first visual field records of 66 glaucomatous eyes enrolled in a prospective longitudinal study (mean follow-up time, 3.4 years; mean number of visual field tests, 8.3) were matc...
PURPOSE Published recommendations suggest three visual field (VF) tests per year are required to identify rapid progression in a newly diagnosed glaucomatous patient over 2 years. This report aims to determine if identification of progression would be improved by clustering tests at the beginning and end of the 2-year period. METHODS Computer-simulated "patients" were given a rapid VF (mean d...
BACKGROUND The United States Preventive Services Task Force found that effective interventions for extending breastfeeding duration are generally begun during the prenatal period, provide ongoing support for patients and combine information with face-to-face guidance. A 2001 literature review had similar findings but also found that employing a lactation consultant in the clinical setting may i...
this research concentrates on the lithostratigraphy, biostratigraphy, microfacies and sedimentary environment of the asmari and gachsaran formations at southwest firuzabad. the thickness of the studied section in all 608.95 meters that 220.8 meters belong to the asmari formation and 387.95 meters belong to the gachsaran formation (champe and mol members). in the study area, the asmari formation...
in this thesis our aim is to construct vector field in r3 for which the corresponding one-dimensional maps have certain discontinuities. two kinds of vector fields are considered, the first the lorenz vector field, and the second originally introced here. the latter have chaotic behavior and motivate a class of one-parameter families of maps which have positive lyapunov exponents for an open in...
Background: Lower lung field tuberculosis is atypical presentation of pulmonary tuberculosis which often causes confusion in diagnosis. HIV/AIDS epidemic has considerably increased its incidence. This study was designed to identify the prevalence and different clinical conditions of lung tuberculosis in conjunction with its common clinical and radiological presentations and its treatment. Metho...
any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...
this research has an aim to assess agricultural students' satisfaction from their field of study. the statistical population consisted of 1040 students from the university of bu ali sina (800 bachelor and 240 master students) during the years of 2011 to 2013. through stratified random sampling method 240 bachelor and 80 master students were selected. data was collected by means of a researcher ...
بارزسازی واحدهای سنگ شناختی گنبد نمکی جهانی (فیروزآباد)، با استفاده از دستگاه طیف سنج (field spec3) با تاکید بر اهمیت اقتصادی آنها
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