هدف: نظر به اهمیت نقش عوامل اجتماعی، خانوادگی و اقتصادی در سوگیری رفتار افراد، این بررسی با هدف تعیین رفتارهای پرخطر در نوجوانان سنین مدرسه در شهر تهران انجام شده است.روش: در این بررسی توصیفی- مقطعی با به کارگیری یک پرسش نامه دارای پرسش های جمعیت شناختی و پرسش هایی در زمینه مصرف سیگار، الکل، سلامت روان و غیره ،700 دانش آموز (326 دختر و 374 پسر) راهنمایی و دبیرستان بررسی شدند. داده ها به کمک آزم...

در این پژوهش، رفتار خمشی و برشی تیرهای بتن مسلح سبک با مقاومت بالا به صورت عددی و با استفاده از نرم افزار اجزای محدود abaqus بررسی می گردد. پس از انطباق نتایج تحلیل نرم افزاری و سازگاری این نتایج با مشاهدات آزمایشگاهی، مدل نرم افزاری به دست آمده به منظور انجام تحلیل حساسیت رفتار خمشی و برشی تیرهای بتن مسلح سبک با مقاومت بالا به کار گرفته می شود. نهایتا نتایج در غالب نمودار بار-تغییرمکان، بار-کر...

چکیده

Introduction: The use of tables and chairs in a period of time with poorly designed not only causes interference in physical development, but also hinders the learning and the lack of focus. In this study, the satisfaction level of students in hygiene, nursing, and paramedical faculties were determind in the use of non-ergonomic chairs ergonomic chairs. Method: This is a cross-sectional study....

Introduction: Musculoskeletal disorders are the most common occupational health problem that led to rising costs and declining efficiency of the labor force. The aim of this study was to assess the prevalence of musculoskeletal disorders and assess the risk of these disorders among cleaners. Methods: In this analytic cross-sectional study, among the colleges and dormitories cleaners of Shahid ...

Introdaction: Musculoskeletal disorders MSDs is one of the most common causes of occupational injuries and disability in industrialized nations and developing countries. Musculoskeletal disorders have a high economic losses. . Musculoskeletal disorders not only impact on individuals, but also on organizations and community. Methods: This interventional study was conducted in the Tundish and Sl...

  Background & Aims: Prolonged standing in static posture during occupational tasks has been associated with low back pain (LBP). Increased bilateral gluteus medius (GM) muscles co-activation is considered to be the most predisposing factor for LBP development during prolonged standing in asymptomatic individual. Change and modify flooring in occupational environment is common ergonomic interve...

  Background and aims:Musculoskeletal disorders (MSDs) are one of the most common causes of occupational injuries that appear in back , neck and upper limb mainly . This study was conducted with the objectives of determination of prevalence rate of MSDs and ergonomics assessment of the risk of MSDs in workers of a petrochemical company .   Methods: In this study, 327 randomly selected workers i...

  Background and aims: High percentage of musculoskeletal disorders occurs due to awkward working posture and poor workstation design. So this study was conducted to determine the prevalence rate of musculoskeletal disorders , evaluate workstations and investigate the effectiveness of ergonomic interventional measures among medical school staff of Shiraz University of Medical Sciences (SUMS).  ...

Introduction: Long-term work with computer can lead to damage of vision and musculoskeletal disorder on the computer users. The aim of this study was to determine the predictors of ergonomic computer users based on the Trans theoretical model of computer users working in Baqiyatallah hospital (Aj) in Tehran. Material and Methods: This descriptive study - an analysis on 102 computer users wit...