نتایج جستجو برای: Stiffness

تعداد نتایج: 43062  

Journal: :journal of rehabilitation sciences and research 0
zahra rojhani shirazi assistant professor, department of physiotherapy, school of rehabilitation sciences, shiraz university of medical sciences, shiraz, iran marzieh saadat student research committee, department of physiotherapy, school of rehabilitation sciences, shiraz university of medical sciences, shiraz, iran

background : previous studies have investigated different effects of muscle fatigue on body systems. however, there are no reports on the effect of fatigue protocol and its level on musculotendinous stiffness (mts) of the tricep-surae. this study was designed to compare the effects of 2 levels of submaximal fatigue contraction on mts of triceps-surae. methods: twenty female students by simple r...

Journal: :journal of theoretical and applied vibration and acoustics 0
ali mokhtari department of mechanical engineering, isfahan university of technology, isfahan 84156-83111, iran vahid sarvestan department of mechanical engineering, isfahan university of technology, isfahan 84156-83111, iran hamid reza mirdamadi department of mechanical engineering, isfahan university of technology, isfahan 84156-83111, iran

in this article, vibration analysis of an euler-bernoulli beam resting on a pasternak-type foundation is studied. the governing equation is solved by using a spectral finite element model (sfem). the solution involves calculating wave and time responses of the beam. the fast fourier transform function is used for temporal discretization of the governing partial differential equation into a set ...

Journal: :international journal of civil engineering 0
t. dahlberg professor, department of mechanical engineering

the track stiffness experienced by a train will vary along the track. sometimes the stiffness variation may be very large within a short distance. one example is when an unsupported sleeper is hanging in the rail. track stiffness is then, locally at that sleeper, very low. at insulated joints the bending stiffness of the rail has a discontinuity implying a discontinuity also of the track stiffn...

Journal: :archives of trauma research 0
ali birjandi nejad orthopedic research center, shahid kamyab hospital, mashhad university of medical sciences, mashhad, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) mohammad hosein ebrahimzadeh orthopedic research center, ghaem hospital, mashhad university of medical sciences, mashhad, ir iran; orthopedic research center, ghaem hospital, mashhad university of medical sciences, p. o. box: 91799-99199, mashhad, ir iran. tel/fax: +98-5118417453سازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) ali moradi department of orthopedic surgery, mashhad university of medical sciences, mashhad, ir iran; mass general hospital, harvard medical school, boston, usسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences)

background loss of motion is a well-known complication after elbow trauma and in severe cases, arthrolysis of elbow is the procedure of choice. the posterior approach might have some advantages especially in post-traumatic patients who have undergone the same surgical approach in the past. objectives the aim of this study was to evaluate the short-term outcomes of elbow arthrolysis through post...

اسلامی, منصور, حسین زاده, عفت, صفایی کناری, علیرضا,

Objective: Lower extremity stiffness is associated with variables such as the frequency and length of running steps, the amount of muscle force and power production. Previous studies showed contradictory findings regarding the relationship between lower extremities joints stiffness and start velocity. Sprint start can be highly affected by two key components of lower limb stiffness, namely, for...

اسلامی, منصور, حاتمی جوشقان, زهرا,

Objective: A better understanding of the role of muscle fatigue in lower limb stiffness during performance will provide a strong foundation for the development of optimal training intervention programs. This study aimed to investigate the effect of fatigue on ankle and knee joints and leg stiffness during a 30-scontinuous vertical jump test. Methods: Fifteen female volleyball players without h...

Eshrestaghi, Mojtaba, Ravasi, Ali Asghar, Shirzad, Elham,

Stiffness is an index for determination of elastic properties of body and its optimum range is different in various motion patterns. The Spring-mass model is used for calculating stiffness. In this method, the whole leg is modeled with a linear simple spring. The aim of this study is determination of lower body stiffness and evaluation of its correlation with agility, as dominant motion patt...

Journal: :the archives of bone and joint surgery 0
ebrahimzadeh mohammad hosein mashad university of medical sciences meysam fathi choghadeh orthopedic surgeon, orthopedic research center mashhad university of medical sciences, iran ali moradi assistant professor of orthopedic surgery, orthopedic research center, mashhad university of medical sciences, iran hand fellow, mass general hospital, harvard medical school, boston, 02114 ma, us hamid hejrati kalati orthopedic surgeon, orthopedic research center mashhad university of medical sciences, iran amir h jafarian assistant professor of pathology ghaem hospital, mashhad university of medical sciences

we present a 23-year-old man with distal humerus osteoid osteoma referring to our hospital with pain and progressive stiffness. the patient has been suffering from the disease for two years without a certain diagnosis. the radiographies of elbow did not reveal the pathology but further ct scan and mri studies demonstrated the tumor. the en block resection of the tumor resolved the pain immediat...

Journal: :international journal of civil engineering 0
i. štimac grandić radmile marejcic 3, 51000 rijeka, croatia d. grandić radmile marejcic 3, 51000 rijeka, croatia a. bjelanović radmile marejcic 3, 51000 rijeka, croatia

in this paper, evaluation of torsional stiffness in beam and slab bridge deck elements is presented. a beam and slab bridge decks structurally behave as a grillage. a grillage has an efficient transverse load distribution due to transverse asymmetric load. in the case of bridge deck without transverse beams in the span, transverse load distribution depends on the torsional stiffness of longitud...

Introduction: The ability to attain high level of speed is an essential component of success in many sports fields. However, physical qualities that underpin this ability remain unclear. The purpose of this study was to investigate the role of leg stiffness and vertical stiffness in predicting sprint running. Methods: 50 healthy females were selected among physical education students. The requi...

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