نتایج جستجو برای: speed factor

تعداد نتایج: 1038602  

Journal: :Behavior Research Methods & Instrumentation 1981

Journal: :Gait & posture 2011
Kimberley S van Schooten Lizeth H Sloot Sjoerd M Bruijn Herman Kingma Onno G Meijer Mirjam Pijnappels Jaap H van Dieën

For targeted prevention of falls, it is necessary to identify individuals with balance impairments. To test the sensitivity of measures of variability, local stability and orbital stability of trunk kinematics to balance impairments during gait, we used galvanic vestibular stimulation (GVS) to impair balance in 12 young adults while walking on a treadmill at different speeds. Inertial sensors w...

2015

It has recently been shown that gait speed has an effect on multi-segment foot kinematics. To increase our understanding of these effects, it is critical to compare and develop a database of walking speed ranges. Therefore, the purpose of this study was to determine the effects of walking speed on multi-segment foot kinematics. A 12-camera Vicon motion capture system was used to collect kinemat...

Journal: :international journal of advanced biological and biomedical research 2014
afshin azmoodeh-mishamandani shamsollah abdollahpoor hossein navid mohammad moghaddam vahed

the object of this study was evaluation of a walking tractor drawn peanut harvester at different conditions of soil moisture content and forward speed and comparing it with manual harvesting. the evaluation factors for peanut harvester were two levels of soil moisture content and three levels of forward speed. the results revealed that the effect of soil moisture content was only significant on...

Journal: :international journal of advanced design and manufacturing technology 0
mehdi jafarian gholamhosein dehghan abbas vafaeisefat

surface roughness is one of the most important parameters that plays very critical role in determining the quality of engineering components. a good surface quality resulting in improve of fatigue strength, corrosion and wear resistance of the workpiece. on the other hand, increasing cutting speed and decreasing time of machining are desirable for manufacturers in order to reduce costs and incr...

Journal: :سالمند 0
زهرا فتحی رضایی zahra fathi rezaie shahid beheshti university,tehran.iranدانشگاه شهید بهشتی محمد علی اصلانخانی mohammad ali aslankhani shahid beheshti university,tehran.iranدانشکده تربیت بدنی و علوم ورزشی دانشگاه شهید بهشتی بهروز عبدلی behroz abdoli shahid beheshti university,tehran.iranدانشکده تربیت بدنی و علوم ورزشی دانشگاه شهید بهشتی علیرضا فارسی alireza farsi shahid beheshti university,tehran.iranدانشکده تربیت بدنی و علوم ورزشی دانشگاه شهید بهشتی محمد تقی اقدسی mohammad taghi aghdasi shahid beheshti university,tehran.iranدانشکده تربیت بدنی و علوم ورزشی دانشگاه شهید بهشتی سید حجت زمانی ثانی hojjat zamani sani shahid beheshti university,tehran.iranدانشگاه شهید بهشتی

objectives: this study aimed to compare elderly fallers and non fallers by balance test under dual tasks conditions. methods & materials: this study was a analyse-comparative study. subjects were chosen from three parks of tehran. subjects were 20 older adults with no history of falls (aged 72.60±5years) and 21 older adults with a history of 2 or more falls in the last one year (aged 74.50±6 ye...

Journal: :تحقیقات آب و خاک ایران 0
بهرام بختیاری استادیار دانشکدۀ کشاورزی دانشگاه شهید باهنر کرمان نوذر قهرمان استادیار دانشگاه تهران، پردیس کشاورزی و منابع طبیعی کرج اسحاق رحیمی دانش آموختة کارشناسی ارشد دانشکدۀ کشاورزی دانشگاه شهید باهنر کرمان

wind speed is one of the major parameters required for an estimation of evapotranspiration and determination of crop water requirements. hence, several models and methods have been developed for a prediction of this needed climatic variable. in recent years, by development of soft computing tools, such intelligent systems as artificial neural network (ann) approach have been widely employed in ...

An overview of removal and re-entrainment of particles in turbulent flows is presented. The procedure for the direct numerical simulation (DNS) of the Navier-Stokes equation via a pseudospectral method for simulating the instantaneous fluid velocity field is described. Particle removal mechanisms in turbulent flows in a duct are examined and effects of the near-wall coherent eddies on the parti...

Journal: :Psychology and aging 2009
Michelle Luciano Alan J Gow Sarah E Harris Caroline Hayward Mike Allerhand John M Starr Peter M Visscher Ian J Deary

The e4 allele of the apolipoprotein E (APOE) gene confers risk of Alzheimer's disease and, in some studies, relates to cognitive ability and decline in older people without Alzheimer's disease. Its relationship with processing speed, a contributor to cognitive decline with age, is largely unknown. This study tests the association of APOE with cognition and speed, with and without covarying chil...

Journal: :Collegium antropologicum 2013
Zoran Grgantov Mirjana Milić Ratko Katić

With the purpose of determining the factor structure of explosive power, as well as the influence of each factor on situational efficiency, 56 young female volleyball players were tested using 14 tests for assessing nonspecific and specific explosive power. By factor analysis, 4 significant factors were isolated which explained the total of over 80% of the common variability in young female vol...

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