نتایج جستجو برای: borne vibration

تعداد نتایج: 81787  

Journal: :مهندسی بیوسیستم ایران 0
فیض اله شهبازی علی رجبی پور سید سعید محتسبی شاهین رفیعی

vibration generated by vehicles during road transport has an important impact on agricultural products' damage process, particularly in the case of fruits and vegetables. modulus of elasticity is one of the most conspicuous mechanical properties of fruits, the variation in which can be described as one of the most affecting damage criteria during transportation. this research was conducted...

Journal: :international journal of occupational hygiene 0
parvin nassiri department of occupational health engineering, tehran university of medical sciences, tehran, iran. irajali mohammadi department of occupational health engineering, occupational health research center, iran university of medical sciences, tehran, iran. mohammadhosein beheshti department of occupational health engineering , faculty of health, gonabad university of medical sciences, gonabad , iran. kamal a azam department of biostatistics, school of public health, tehran university of medical sciences, tehran, iran.

the purpose of this study was to assess exposure to hand-arm vibration in tiller users, forty users of tiller in northeastern provinces of iran were examined to measure hand-arm vibration parameters such as root mean square acceleration (rms), total equivalent acceleration, vibration dose value (vdv) and crest factor in three directions (x, y, and z) and various operating modes for comparing th...

Journal: :iranian journal of child neurology 0
m.m. taghdiri associate professor of child neurology, hamedan university of medical sciences i. seddighi assistant professor of pediatric, hamedan university of medical sciences

objective botulism is the acute, descending, flaccid paralysis that results when the neurotoxin of clostridium botulinum blocks neuromuscular transmission. c botulinum toxin is the most poisonous substance that blocks neuromuscular transmission and causes death through airway and respiratory muscle paralysis; all forms of botulism manifest neurologically as asymmetric, descending, flaccid paral...

Journal: :Materials Technology 2023

Recently, the application of flexible sensors in mechanical equipment has attracted widespread attention. However, design vibration sensor materials and structures for complex environments still faces challenges. Hence, we proposed an annular structure CCTO/PDMS-based triboelectric nanogenerator (CP-TENG) as self-powered automotive bolt tightness sensor. Due to high dielectric properties CCTO/P...

Journal: :Lecture notes in civil engineering 2023

Abstract The integrated composite wallboard is a new type of prefabricated building enclosure made autoclaved aerated concrete (ALC) and rock wool panel, which can meet the thermal requirements cold areas in China without additional insulation. ALC divided into local four-sided supported plates by vertical horizontal ribs, makes have different sound insulation performance from single uniform ma...

Journal: :iranian red crescent medical journal 0
seyyed ali moussavi najarkola department of occupational hygiene, collage of health, shahid beheshti university of medical sciences, tehran, ir iran ali khavanin department of occupational health, school of medical sciences, tarbiat modares university, tehran, ir iran; department of occupational health, school of medical sciences, tarbiat modares university, tehran, ir iran, tel: +98-2182883849, fax: +98-2182883825 ramazan mirzaei department of occupational health, health promotion research center, zahedan university of medical sciences,zahedan, ir iran mojdeh salehnia department of anatomical sciences, school of medical sciences, tarbiat modares university, tehran, ir iran ahad muhammadnejad cancer research center, iran cancer institute, tehran university of medical sciences, tehran, ir iran

background many industrial devices have an excessive vibration which can affect human body systems. the effect of vibration on cochlear histology has been as a debatable problem in occupational health and medicine. objectives due to limitation present in human studies, the research was conducted to survey the influence of vibration on cochlear histology in an animal model. materials and methods...

Journal: :journal of agricultural science and technology 2010
f. shahbazi a. rajabipour s. mohtasebi sh. rafie

vibration generated by vehicles during road transport has an important effect on the agricultural products damage process, particularly vegetable and fruit. modulus of elasticity is one of the most important mechanical properties of fruits and its variation can be described as one of the damage criteria during transportation. this research was conducted to evaluate the effects of vibration para...

Journal: :مهندسی بیوسیستم ایران 0
حسین جوادی کیا دانشگاه رازی کرمانشاه لیلا ندرلو دانشگاه رازی کرمانشاه علی سفرنگیان دانشگاه رازی مصطفی مصطفایی دانشگاه رازی سید سعید محتسبی دانشگاه تهران

in this study, the mf285 tractor engine vibrations resulting from the use of different combinations of biodiesel, bioethanol and diesel as fuel were studied. engine vibrations in three directions and three engine speeds: 1000, 1600 rpm 2000 and ten fuel level was measured. to investigate the influence of measured parameters on engine vibration of factorial design in a randomized complete block ...

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