نتایج جستجو برای: lack of concentration
تعداد نتایج: 21175937 فیلتر نتایج به سال:
The aim of this study includes investigation into the impact of education based on Gardner’s Theory of Multiple Intelligences (MI) on educational achievement of high school students (Grade II) in mathematics from Garmsar City. The current study is of applied type in terms of nature since research is seeking for testing of some theoretical concepts in real and live situations. Whereas the presen...
Contamination of Saprolegnia sp. fungi in edible and ornamental fish is one of the common problems of fish aquaculture ponds and aquariums and has economic losses. The aqueous, methanolic, and hydroalcoholic extracts of Spartium junceum and Melissa officinalis were prepared by maceration and condensed by rotary. Four concentrations of 20, 30, 40 and 50 mg/ml of the extracts were used. The fungu...
background: non communicable diseases (ncd) will account for 73% of deaths and 60% of the global disease burden by 2020. physical activity plays a major role in the prevention of these non‑communicable diseases. the stress involved in meeting responsibilities of becoming a physician may adversely affect the exercise habits of students. so, the current study aimed to study the practice of physic...
The Pearson-Fisher chi-squared test can be used to evaluate the goodnessof-fit of categorized continuous data with known bin endpoints compared to a continuous distribution, in the presence of unknown (nuisance) distribution parameters. Rayner and McAlevey [11] and Rayner and Best [9],[10] demonstrate that in this case, component tests of the Pearson-Fisher chi-squared test statistic can be obt...
Introduction: The workplace is one of the most significant environments where people spend most of their time. Lack of acoustic comfort is one of the most important factors that threatens the health and well-being of employees in these workplaces every day. The purpose of this study, while identifying the symptoms caused by noise problems among employees, is to identify the main parameters and ...
background: the human body gets fluorine from a variety of sources including food and water. this element is essential in order to prevent tooth decay. however, high concentrations of this element led to a lot of dental fluorosis and skeletal injuries. this study aimed to measure the concentration of fluoride in water and tea consumed in the city of qom. methods: the present study is cross-sect...
abstract in this study, the effect of suspended load transport on the characteristics of submerged hydraulic jump (shj) in a rectangular channel was investigated experimentally. sediment concentration and jet froude numbers in the range of 0.424%-16.15% and 1.93-4.96, respectively, were considered. tow grain size 0.15 and 0.03 mm were used in the experiments. characteristics of submerged hydrau...
one of the most important dimention of the industrial structure is the concentration. in order to determine concentration in iranian industries from 2000 to 2005, the 5-firm concentration ratio is used in terms of sale value, production, value added and employment variables. the results indicate high correlation among concentration ratios in terms of sale, employment, value added and production...
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