نتایج جستجو برای: vibration frequency mean values were 7.50 hz and 13.0 hz for 5

تعداد نتایج: 19314533  

Journal: :journal of agricultural science and technology 2010
r. karami-osboo m. khodaverdi f. ali-akbari

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
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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - پژوهشکده تربیت بدنی و علوم ورزشی 1391

چکیده معضل چاقی به عنوان عارضه ای جدی برای زندگی بی تحرک و ماشینی، مورد توجه اغلب مراکز بهداشتی و درمانی دنیا قرار گرفته است. چاقی عامل زمینه ساز و در واقع عامل خطری برای بروز بیماری های قلبی - عروقی است که عموماً با کاهش طول عمر مورد انتظار و افزایش بیماری همراه است. هدف پژوهش حاضر تأثیر 12 هفته تمرینات ویبریشن کل بدن، تمرینات هوازی و تمرینات ترکیبی( هوازی و ویبریشن کل بدن) بر ترکیب بدنی زنان ...

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: :ماشین های کشاورزی 0
حمید قربانپور محمد هادی خوش تقاضا محمدرضا مستوفی سرکاری

manual citrus harvesting is commonly performing hard, expensive and time consuming. in this study, a factorial experiment with a completely randomized design in three replications was performed to find out the effect of frequency (three levels of 5, 7.5 and 10 hz), vibration time (three levels of 10, 15 and 20 seconds) on harvesting capacity and losses of thomson cultivar of orange. the results...

, Ali Khavanin, Kaykāvus Azrah, Mahbubeh Parsaeian, Majid Shahi, Mohammad Reza Monazzam,

Introduction: This study aims to determine the amount of hand-arm vibration transmitted from heavy electric destruction tools and the effect of using chisel with different lengths and shapes when demolishing concrete surfaces. Material and Methods: To evaluate the magnitude of hand-arm vibration on the left and right handles of two powerful electric demolition hammers commonly applied in Irani...

Journal: :Industrial health 2008
Nobuyuki Shibata Setsuo Maeda

The mean vibration transmissibility values were measured for cotton work gloves commonly used in vibration-generating workplaces to evaluate the vibration isolating performance of cotton work gloves. The mean vibration transmissibility values of work cotton gloves were compared with those of four types of anti-vibration gloves measured in the same way. All the measurements were performed based ...

پایان نامه :دانشگاه رازی - کرمانشاه - دانشکده ادبیات و علوم انسانی 1393

in recent years, there has been a growing interest among researchers to investigate the relationship betweenteacher self-efficacy and classroom behavior management, especially students misbehavior. therefore, this study aimed to comparatively investigate english and arabic teachers’ use of different behavior managementstrategies, their self-efficacy, and their success in an iranian context. th...

Journal: :تحقیقات موتور 0
محمد رضا قاسمی m.r. ghassemi یوسف حجت y. hojjat

today there are different vibration isolators used in industries according to the weight and excitation frequency of the machines which have vibration. one of them is air spring which is in two types: convoluted air spring and membrane air spring. convoluted air springs are used to control vibrations in low frequency (usually lower than 10 hz) and the membrane ones are used in high frequency (u...

Journal: :iranian journal of basic medical sciences 0
shengwei he department of orthopedics, second affiliated hospital, dalian medical university, dalian, liaoning province, 116031, p.r. china wenzhi zhao department of orthopedics, second affiliated hospital, dalian medical university, dalian, liaoning province, 116031, p.r. china lu zhang department of orthopedics, second affiliated hospital, dalian medical university, dalian, liaoning province, 116031, p.r. china lidong mi department of orthopedics, second affiliated hospital, dalian medical university, dalian, liaoning province, 116031, p.r. china guangyu du department of orthopedics, second affiliated hospital, dalian medical university, dalian, liaoning province, 116031, p.r. china chuanxiu sun department of orthopedics, second affiliated hospital, dalian medical university, dalian, liaoning province, 116031, p.r. china

objective(s):to study the effect of low-frequency vibration on bone marrow stromal cell differentiation and potential bone repair in vivo. materials and methods:forty new zealand rabbits were randomly divided into five groups with eight rabbits in each group. for each group, bone defects were generated in the left humerus of four rabbits, and in the right humerus of the other four rabbits. to t...

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