نتایج جستجو برای: people body vibration

تعداد نتایج: 1115972  

2015
Neil J. Mansfield Jamie Mackrill Andrew N. Rimell Simon J. MacMull

Occupants of automobiles experience discomfort after long drives, irrespective of how well designed a seat might be. Previous studies of discomfort during driving have focused either on the seat shape andmaterials (“static” properties), long-term discomfort (“fatigue” properties), or dynamics (“vibration” properties).These factors have previously not been considered together.This paper reports ...

Operators of construction vehicles are constantly exposed to whole body vibration, which can lead to musculoskeletal disorders. The aim of present study was to evaluate the impact of exposure to whole body vibration in operators and its relation to musculoskeletal disorders. This study is a descriptive-analytical study. Using easy sampling, 89 operators from 6 types of heavy vehicles (Bulldoze...

Journal: :تحقیقات نظام سلامت 0
اصغر نیک روش استادیار، گروه مهندسی بهداشت حرفه ای، دانشگاه علوم پزشکی شیراز، شیراز، ایران زهرا زمانیان دانشجوی کارشناسی ارشد ارگونومی، گروه ارگونومی، دانشگاه علوم پزشکی شیراز، شیراز، ایران مجتبی خدادادی مربی، گروه روانشناسی، دانشگاه امام حسین(ع)، تهران، ایران محمدرضا منظم دانشیار، گروه مهندسی بهداشت حرفه ای، دانشگاه علوم پزشکی تهران، تهران، ایران جعفر حسن زاده دانشیار، گروه اپیدمیولوژی، دانشگاه علوم پزشکی شیراز، شیراز، ایران

background: deficiency of attention and concentration is one of great reasons of traffic incidents and it covers between 20 to 50 percent of events due to careless and mindedness. studies show that attention and concentration are considered as one of important cognitive components in safe driving. vibration is an important physical effect in all vehicles. till now has not been any organized stu...

Journal: :Acta of bioengineering and biomechanics 2015
William M Bertucci Ahlem Arfaoui Sebastien Duc Thierry Letellier Abderrahim Brikci

PURPOSE The purpose of this study was to investigate the effect of whole body vibration in oxygen uptake during intense squatting exercise with an added weight and whole body vibration compared with the same exercise without vibration. METHODS Nine male sub- jects performed three trials of dynamic squatting with an additional load of 50% of their body weight during 3 min. One trial without vi...

ژورنال: سلامت کار ایران 2018

Background and aims: Whole-body vibration is one of the major factors that cause human discomfort and physiological reactions in industrial environments or vehicles. This study aimed in a laboratory environment to investigate the effect of whole body vibration on   human discomfort, heart rate and reaction time in men 20 to 30 years old.  Methods:  40 Male students i...

2015
Anna Słupik Anna Mosiołek Dariusz Białoszewski

Introduction: Whole-Body Vibration (WBV) uses high frequency mechanical stimuli generated by a vibration plate and transmitted through bone, muscle and connective tissues to the whole body. Research has shown that long-term vibration-plate training improves neuromuscular facilitation, especially in afferent neural pathways, responsible for the conduction of vibration and proprioceptive stimuli,...

اعظم, کمال , بهشتی, محمد حسین , حاجی زاده, روح اله , علی محمدی, ایرج , نصیری, پروین ,

Introduction: Tractor drivers are continuously exposed to whole body vibration during driving that, this may cause disorders in the system of musculoskeletal, nervous, circulatory and occupational diseases. The aim of this study was to evaluate exposed to whole body vibration among tractor driver. .Material and Method: In this study, whole-body vibration parameters such as root mean square (...

Journal: :international journal of automotive engineering 0
b. sakhaei m. durali

by new advancements in vehicle manufacturing vehicle quality evaluation and assurance has become a more critical issue. in present work, the vibration transfer path analysis and vibration path ranking of a car interior has been performed. the method is similar to classical multilevel tpa methods but has distinct differences. the method is named vivs which stands for vehicle interior vibration s...

Journal: :Physiological research 2001
A Polónyová F Hlavacka

We analyzed human postural responses to muscle vibration applied at four different frequencies to lower leg muscles, the lateral gastrocnemius (GA) or tibialis anterior (TA) muscles. The muscle vibrations induced changes in postural orientation characterized by the center of pressure (CoP) on the force platform surface on which the subjects were standing. Unilateral vibratory stimulation of TA ...

2008
Young-Hwan Chang Yonghwan Oh Doik Kim Seokmin Hong

In this paper, we present vibration suppression and balance control algorithm for biped humanoid robots in the motion embedded CoM Jacobian. The vibration control is employed during a single supporting phase, which can suppress vibration induced by structure flexibility. Because the previously proposed walking control method in the whole body coordination (WBC) framework is based on the rigid b...

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