نتایج جستجو برای: mechanical load

تعداد نتایج: 375363  

2013
Rong Mei Mou Chen

In this work, the robust position control scheme is proposed for the electro-mechanical system using the disturbance observer and backstepping control method. To the external unknown load of the electro-mechanical system, the nonlinear disturbance observer is given to estimate the external unknown load. Combining the output of the developed nonlinear disturbance observer with backstepping techn...

Journal: :Circulation research 2013
Daniela Zablocki Junichi Sadoshima

A series of studies conducted 20 years ago, documenting the cardiac hypertrophy phenotype and its underlying signaling mechanism induced by angiotensin II (Ang II) and mechanical stress, showed a remarkable similarity between the effect of the Gαq agonist and that of mechanical forces on cardiac hypertrophy. Subsequent studies confirmed the involvement of autocrine/paracrine mechanisms, includi...

Journal: :journal of dentistry, tehran university of medical sciences 0
masumeh hasani tabatabaei tehran university of medical sciences sakineh arami tehran university of medical sciences farnaz farahat shahid sadoughi university of medical sciences

objectives: dental composite wear in posterior restorations is a concern and is affected by different factors. this study was conducted to evaluate the effect of polishing and mechanical loads on wear of silorane-based and methyl methacrylate-based composites resins. materials and methods: of each dental composite (filtek p90 and filtek p60), 40 samples were fabricated in a polyethylene mold (4...

Journal: :Journal of the mechanical behavior of biomedical materials 2015
P Dewo E B van der Houwen Suyitno R Marius R Magetsari G J Verkerke

Mechanical properties determined by fatigue strength, ductility, and toughness are important measures for osteosynthesis plates in order to tolerate some load-bearing situations caused by muscle contractions and weight-bearing effects. Previous study indicated that Indonesian-made plates showed lower mechanical strength compared to the European AO standard plate. High stress under load-bearing ...

2012
W. J. Chen Yue Zheng Biao Wang

Vortex domain patterns in low-dimensional ferroelectrics and multiferroics have been extensively studied with the aim of developing nanoscale functional devices. However, control of the vortex domain structure has not been investigated systematically. Taking into account effects of inhomogeneous electromechanical fields, ambient temperature, surface and size, we demonstrate significant influenc...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 2010

2017
Mauricio Valdivia Franco Vega-Macaya Patricio Olguín

The development of the musculoskeletal system is a great model to study the interplay between chemical and mechanical inter-tissue signaling in cell adhesion, tissue morphogenesis and differentiation. In both vertebrates and invertebrates (e.g., Drosophila melanogaster) the formation of muscle-tendon interaction generates mechanical forces which are required for myotendinous junction maturation...

1998
Richard W. Armstrong

This paper addresses the issue of inertia mismatch from a theoretical and practical standpoint. Fundamentally, power transmission is optimized in a mechanical system if the load inertia matches the motor inertia. This may, or may not be practically implemented with gearing between motor and load. Gearing inertia, inefficiency, mechanical limits, and cost all factor into the decision as to wheth...

Journal: :Biophysical journal 1994
T Arts F W Prinzen L H Snoeckx J M Rijcken R S Reneman

In the cardiac left ventricle during systole mechanical load of the myocardial fibers is distributed uniformly. A mechanism is proposed by which control of mechanical load is distributed over many individual control units acting in the environment of the cell. The mechanics of the equatorial region of the left ventricle was modeled by a thick-walled cylinder composed of 6-1500 shells of myocard...

Journal: :Circulation research 2011
Nathaniel L Tulloch Veronica Muskheli Maria V Razumova F Steven Korte Michael Regnier Kip D Hauch Lil Pabon Hans Reinecke Charles E Murry

RATIONALE The developing heart requires both mechanical load and vascularization to reach its proper size, yet the regulation of human heart growth by these processes is poorly understood. OBJECTIVE We seek to elucidate the responses of immature human myocardium to mechanical load and vascularization using tissue engineering approaches. METHODS AND RESULTS Using human embryonic stem cell an...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید