نتایج جستجو برای: mechanical load

تعداد نتایج: 375363  

Journal: :Cardiovascular research 1999
J E Bishop G Lindahl

1. Introduction the mechanical environment an extremely fascinating area of study. The cardiovascular system is constantly exposed to Research into the role of mechanical force in tissue mechanical perturbation from shear and tensile stresses. growth has been advanced considerably over the last 10 During development cardiovascular cells respond to years or so with the development of devices des...

A Ghorbanpour Arani, A.A Mosallaie Barzoki R Kolahchi

The use of intelligent nanocomposites in sensing and actuation applications has become quite common over the past decade. In this article, electro-thermo-mechanical nonlinear dynamic buckling of an orthotropic piezoelectric nanocomposite (PNC) cylindrical shell conveying viscous fluid is investigated. The composite cylindrical shell is made from Polyvinylidene Fluoride (PVDF) and reinforced by ...

Journal: :Revista brasileira de ortopedia 2011
Trajano Sardenberg Sérgio Swain Muller Luciana Zauhy Garms Francini Belluci Miduati

OBJECTIVE The aim of this study was to evaluate the effects on the mechanical properties of rats' calcaneus tendons, of repair arrangements using suture material in the absence of any healing process. METHOD Twelve male Wistar rats were used. They were subjected to placement of a modified Kessler suture stitch in the calcaneus tendon. The sacrifices were performed immediately after and six we...

A. Ghorbanpour Arani, S. Amir S. Shams Z. Khoddami Maraghi

Using  principle  of  minimum  total  potential  energy  approach  in conjunction  with  Rayleigh-Ritz  method,  the  electro-thermo- mechanical  axial  buckling  behavior  of  piezoelectric  polymeric cylindrical  shell  reinforced  with  double-walled  boron-nitride nanotube  (DWBNNT)  is  investigated. Coupling  between  electrical and mechanical  fields  are  considered  according  to  ...

Journal: :IBM Journal of Research and Development 2002
John S. Corbin Ciro N. Ramirez Danny E. Massey

The design and performance of land grid array (LGA) sockets are discussed with respect to high-performance server applications. Motivations for the use of this technology are presented, and the specific challenges associated with its application are discussed from a mechanical perspective. A variety of mechanical performance considerations are identified for LGA socket technologies, and a detai...

2012
K. A. Khandakji

Braking in hoisting drives is used to reduce the speed of the load (cargo) or to stop it completely. Braking can be realized using electrical and mechanical means; mechanical brake is used to hold the suspended cargo after disconnecting the driving motor from the supply. In modern hoisting electric drive systems, in addition to mechanical braking, electric braking is also used. Electric braking...

2014
Shinsuke Yoshioka Akinori Nagano Dean C Hay Senshi Fukashiro

BACKGROUND Previous studies have consistently reported that decreasing seat height increases the peak hip and knee joint moments; however, these findings may not apply to biomechanical changes at very low seat heights. The purpose of this study, therefore, was to examine the effect of a large range of seat heights on peak joint moments of the lower limb during a sit-to-stand (STS) movement. M...

2013
Wan Zong ming Li Jian yu Li Rui xin Li Hao Guo Yong Liu Lu Zhang Xin chang Zhang Xi zheng

BACKGROUND When studying and designing an artificial bone in vitro with similar features and functionality of natural bone by tissue engineering technology, the culturing environment, especially the mechanical environment is supposed to be an important factor, because a suitable mechanical environment in vitro may improve the adaptability of the planted-in tissue engineering bone in the body. U...

Journal: :Pharmacological reports : PR 2005
Ilona Kaczmarczyk-Sedlak Waldemar Janiec Maria Pytlik Leszek Sliwiński Joanna Folwarczna Urszula Cegieła Barbara Nowińska Małgorzata Barnaś

The experiments were carried out on rats, divided into 7 groups: I-sham-operated control rats, II-ovariectomized (OVX) control rats, II- OVX+etidronate (10 mg/kg po), IV-OVX+retinol (700 IU/kg po), V-OVX+retinol (3,500 IU/kg po), VI-OVX+etidronate (10 mg/kg po)+retinol (700 IU/kg po), VII-OVX+etidronate (10 mg/kg po)+retinol (3 500 IU/kg po). The drugs were administered once a day for 4 weeks. ...

Journal: :مرتع و آبخیزداری 0
مسعود عشقی زاده دانشجوی دکتری علوم و مهندسی آبخیزداری دانشکدة منابع طبیعی و کویرشناسی دانشگاه یزد محمد تقی دستورانی دانشیار دانشکدة منابع طبیعی و محیط زیست دانشگاه فردوسی مشهد علی طالبی دانشیار گروه آبخیزداری دانشکدة منابع طبیعی و کویرشناسی دانشگاه یزد

the management of sedimentation problems in rivers and reservoirs depend greatly on the sediment yield from the catchment land surface. in this research the effects of biological measures and ranges enclose on suspended load in two sub-catchments of kakhk experimentalwatershed in gonabad has been studied. this catchment contains both control and experimental sub-catchments. these sub-catchments...

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