نتایج جستجو برای: work over load

تعداد نتایج: 2065508  

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
احمد باسامی کارشناس ارشد رشته ترویج و آموزش کشاورزی، دانشگاه تربیت مدرس محمد چیذری استادیار گروه ترویج و آموزش کشاورزی، دانشگاه تربیت مدرس عنایت عباسی استاد گروه ترویج و آموزش کشاورزی، دانشگاه تربیت مدرس

the purpose of this descriptive – correlation research was to investigate factors influencing job burnout among jihad-e keshavarzi organization specialists in kurdistan province. the statistical population of the study consisted of all jihad-e keshavarzi organization specialists (n=449). using the krejcie and morgan’s (1970) table and proportional stratified random sampling technique, 220 speci...

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم انسانی 1392
حمیده مظفری, ژاله حساس خواه, هدی دیوسر,

this study investigated how group formation method, namely student-selected vs. teacher-assigned, influences the results of the community model of teaching creative writing; i.e., group dynamics and group outcome (the quality of performance). the study adopted an experimental comparison group and microgenetic research design to observe the change process over a relatively short period of time. ...

15 صفحه اول
Journal: :int. journal of mining & geo-engineering 2012
ali kamali moaveni mohammad noaparast bahram rezai

the aim of this research work was to investigate on the ball filling estimation of miduk semi-autogenous (sag) mill via an utilized method. miduk copper concentrator is located in kerman province, iran, and its size reduction stage includes one gyratory crusher which feeds one sag mill (9.75 dia.(m)*3.88 length(m)) following two parallel ball mills (5dia.(m)*7lenght(m)). after sag mill, a tromm...

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Journal: :journal of health sciences and surveillance system 0
samira mirzaei department of occupational health, school of health, shiraz university of medical sciences, shiraz, iran zahra zamanian department of occupational health, school of health, shiraz university of medical sciences, shiraz, iran jafar hasan zade department of epidemiology, school of health, shiraz university of medical sciences, shiraz, iran

background: the present study aimed to investigate the effects of work shifts and mental workload on chronic fatigue among female nurses in intensive care units of selected hospitals in shiraz.   methods: the participants in this cross-sectional study were 118 female nurses working in intensive care units of three hospitals in shiraz with an average age of 304.8± years. sp (samn-perelli) mental...

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Journal: International Journal of Mining and Geo-Engineering 2012
Ali Kamali Moaveni Bahram Rezai, Mohammad Noaparast,

The aim of this research work was to investigate on the ball filling estimation of Miduk semi-autogenous (SAG) Mill via an utilized method. Miduk copper concentrator is located in Kerman Province, Iran, and its size reduction stage includes one gyratory crusher which feeds one SAG mill (9.75 dia.(m)*3.88 length(m)) following two parallel ball mills (5dia.(m)*7lenght(m)). After SAG mill, a tromm...

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Journal: :BMJ 1979

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Journal: :BMJ 1978

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Journal: :The Japanese journal of ergonomics 1995

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Journal: :تحقیقات نظام سلامت 0
حبیب اله دهقان گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشکده بهداشت دانشگاه علوم پزشکی اصفهان، اصفهان، ایران سیف اله غریب کارشناسی ارشد مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشکده بهداشت دانشگاه علوم پزشکی اصفهان، اصفهان، ایران حسینعلی یوسفی ریزی گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشکده بهداشت دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

background: noise is one of the annoying agents in the environment and it is harmful agent in workplaces that its occurrence with work load, there are in many workstations. the aim of this study was to determine the combined effects of exposure to noise and work load on heart rate changes. methods: this cross-sectional study performed on 14 male students into climatic chamber in 2011.the mean ±...

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Journal: :journal of paramedical sciences 0
rasool hemmatjo occupational health faculty, bousher university of medical sciences, bushehr sajad zare department of occu¬pational health, school of public health, tehran university of medical sciences, tehran akbar babaei heydarabadi department of public health, student`s committee research, faculty of health, shahid beheshti university of medical sciences, tehran abdollah hajivandi occupational health faculty, bushehr university of medical sciences, bushehr

heat stress is a significant occupational health and safety for workers in petrochemical industries. heat stress is a combination of heat load individual and environmental factors impose on workers’ bodies, which in turn, have impacts on workers’ performance, safety, and health. the present paper is carried out to determine the heat stress levels in workplace and to compare it with allowed wet ...

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نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید

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    • "; pgn_html+=pgn_li; } document.getElementById("pgn-ul").innerHTML=pgn_html var pgn_links = document.querySelectorAll('.mypgn'); pgn_links.forEach(function(pgn_link) { pgn_link.addEventListener('click', paginate) }) } function post_and_fetch(data,url) { showLoading() xhr = new XMLHttpRequest(); xhr.open('POST', url, true); xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8'); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var resp = xhr.responseText; resp_json=JSON.parse(resp) resp_place = document.getElementById("search_result_div") resp_place.innerHTML = resp_json['results'] search_meta = resp_json['meta'] update_search_meta(search_meta) update_pagination() hideLoading() } }; xhr.send(JSON.stringify(data)); } function unfilter() { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":"unfilter", "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } function deactivate_all_bars(){ var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(bar) { bar.dataset.active = false bar.style = "stroke:#71a3c5;" }) } year_chart.on("created", function() { var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(check) { check.addEventListener('click', checkIndex); }) }); function checkIndex(event) { var yrchart = document.querySelectorAll('.ct-bar'); var year_bar = event.target if (year_bar.dataset.active == "true") { unfilter_res = unfilter() year_bar.dataset.active = false year_bar.style = "stroke:#1d2b3699;" } else { deactivate_all_bars() year_bar.dataset.active = true year_bar.style = "stroke:#e56f6f;" filter_year = chart_data['labels'][Array.from(yrchart).indexOf(year_bar)] url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":filter_year, "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } } function showLoading() { document.getElementById("loading").style.display = "block"; setTimeout(hideLoading, 10000); // 10 seconds } function hideLoading() { document.getElementById("loading").style.display = "none"; } -->