نتایج جستجو برای: physical stress
تعداد نتایج: 1073923 فیلتر نتایج به سال:
in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...
exposure to stress leads to physiological changes called “stress response” which are the result of the changes in the adrenomedullary hormone system, hypothalamus-pituitary-adrenal (hpa) and sympathetic nervous system (sns) activity. in the present study, the effects of chronic physical and psychological stress and also the role of sympathetic system effects in stress on ischemia/reperfusion (i...
background: mental disorders have an important relationship with work conditions. excessive workload, laborers needs and expectations ignorance, harmful physical agents, noise, poor lightning and bad work atmosphere result increasing stress and job dissatisfaction in workers . methods: this descriptive-analytical survey implemented in order to investigate stress and job satisfaction rate of one...
posttraumatic stress disorder (ptsd) occurs following exposure to potentially traumatic experiences such as those regularly encountered by emergency service workers (police, ambulance and firemen/women) and servicemen/women. ptsd is associated with high rates of somatic comorbidities including metabolic syndrome contributing to an excess mortality rate due to preventable cardiovascular diseases...
the aim of this study was to determine heat stress effect on physical capacity of semi-professional footballers in iran by means of oxygen consumption measurement, heart rate monitoring and wbgt assessment environmental conditions.this study compared two different thermal environmental conditions related to sub-maximal exercise and its effect on human physical capacity. thirty two male football...
background: different stressors induce learning and memory impairment and physical activity influence learning and memory enhancement. in this research, we investigated the effect of synchronized running activity with stress on acquisition and retention time of passive avoidance test. methods: male wistar rats were randomly divided into five groups as follows: control (co), sham (sh), exercise ...
deposite the different criticisms on contrastive analysis it has been proved that the results of it(when processed)can be usuful in a tefl environment,specially at the level of phonology.this study is an attempt to compare and contrast the sound systems of kurdish and english for pedagogical aims. the consonants,vowels,stress and intonation of the twolanguages are described by the same model-ta...
a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...
پژوهش حاضر با هدف بررسی رابطه مدیریت زمان و استرس شغلی انجام گرفت. بدین منظور از بین 18254 معلم شاغل در اداره آموزش و پرورش شهر مشهد در سال تحصیلی(89- 88 ) تعداد 100 نفرمعلم تربیت بدنی و 375 نفر معلم غیرتربیت بدنی از طریق نمونه گیری طبقه ای متناسب با حجم انتخاب شدند. آزمودنی ها پرسشنامه مدیریت زمان با پایایی 86/0 و پرسشنامه استرس شغلی، با پایایی74/0را تکمیل نمودند. در این تحقیق به منظور تجزیه و...
introduction: diabetes mellitus is an growing national and international public health concern. the number of people affected by diabetes in world by 2030 will be 69% in developing countries. regular physical activity plays a key role in the management of type 2 diabetes melitus, particularly glycemic control. it has been recommended that peoples with type 2 diabetes participate in moderate-int...
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