نتایج جستجو برای: threshold exposure density ted
تعداد نتایج: 823717 فیلتر نتایج به سال:
Background: It is important to know the best intervention approach replenish serum vitamin D levels along with therapeutic interventions for chronic low back pain (CLBP) patients. From researcher’s knowledge, no study compared “vitamin supplement” or “booklet education on sun exposure, nutrition and lifestyle” exercise CLBP cases. Researchers hypothesize that multidi...
River bend due to particular pattern, called 'Vortex Flow,' has greater erosion than straight path. Occurrence of scour around bridge abutment on curved paths is one of the main reasons for destruction of bridges. Riprap is one of the methods to control the scouring around the bridge abutment. The purpose of this study was to assess stability of the riprap around the bridge abutment at 180 degr...
Background and Aims Bone density is frequently used in medical diagnosis and research. The current methods for determining bone density are expensive and not easily available in dental clinics. The aim of this study was to design and evaluate the accuracy of a digital method for hard tissue densitometry which could be applied on personal computers. Materials and Methods: An aluminum step we...
BEIs: Threshold limit values for chemical substances and physical agents biological exposure indices. Cincinnati, OH: American Conference of Governmental Industrial Hygienists. *ACGIH. 1999b. Strontium chromate. 1999 TLVs and BEIs: Threshold limit values for chemical substances and physical agents biological exposure indices. Cincinnati, OH: American Conference of Governmental Industrial Hygien...
Background and purpose: Considerable increase on the use of electronic devices increased the rate of public occupational exposure to extremely low frequency electromagnetic fields. Assessment of exposure to these fields is highly important due to potential health hazards. This study aimed at investigating the magnetic flux emission from extremely low frequency electromagnetic fields around powe...
Children have about the same risk (or slightly increased) as adults to develop Graves' ophthalmopathy (GO) once they have contracted Graves' hyperthyroidism. The severity of childhood GO appears to be less than that of adult GO. The female preponderance is similar between children and adults with Graves' hyperthyroidism (87% and 83%, respectively), but the prevalence of smoking is much lower in...
TED (Technology, Entertainment, Design) is an internationally based open access platform where professionals from various fields are invited to give speeches, and share ideas with like-minded people. In recent years, topics related the coronavirus disease (COVID-19) or COVID-19 pandemic have become most popular speech on TED. This paper selects speech-related TED during pandemic, by usin...
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