نتایج جستجو برای: elastic

تعداد نتایج: 70682  

Displacements around a tunnel, occurring as a result of excavation, consist of the elastic and plastic parts. In this paper, we discuss the elastic part of displacements as a result of excavation, called net displacement. In general, the previous analytical solutions presented for determining the displacements around a circular tunnel in an elastic medium do not give the net displacements...

Journal: :iranian journal of medical physics 0
s. shahbazi m. sc. in medical physics, tarbiat modares university, tehran, iran m. mokhtari-dizaji associate professor, medical physics dept., tarbiat modares university, tehran, iran m. zarin optometrist, iran university of medical sciences, rassol hospital, tehran, iran m. mansori associate professor, ophthalmology dept., tehran university of medical sciences, farabbi hospital, tehran, iran

introduction: based on the invasive studies it has been shown that factors such as age, the progress of eye disorders, lens fibers compression and the biochemical changes of ocular matrix alter the physical characteristics and elastic properties of eye. in this study, a noninvasive method of estimating human eye elasticityis proposed and its relation with age and gender is evaluated using ultra...

Journal: :journal of modern processes in manufacturing and production 2014
hassan gheisari

in this study; utilizing the elastic matrix ball has higher processing efficiency and better superficial quality than traditionalgrinding. the diversity of elastic abrasive tool characteristics contact with bend surface results in irregular wear abrasion,and abrasive tool machining status gets complicated. there is no theoretical interpretation of parameters affecting the grinding accuracy. bec...

Journal: :journal of dental research, dental clinics, dental prospects 0
zahra javanmardi orthodontic research center, school of dentistry, shiraz university of medical sciences, shiraz, iran. parisa salehi orthodontic research center, school of dentistry, shiraz university of medical sciences, shiraz, iran.

background and aims: elastomeric chains and niti coil springs are two major traction aids in orthodontic tooth movements. force degradation occurs over time in both groups, with higher percentages in elastic chains. the effects of environmental factors and some mouth rinses on this force decay have been previously studied. no study has been performed to evaluate the effect of current popular mo...

Journal: :dental research journal 0
shiva alavi reza birang fatemeh hajizadeh hamed banimostafaee

background: the aim of this study was to compare the effects of conventional acid etching and laser etching on the nano-mechanical properties of the dental enamel using nano-indentation test. materials and methods: in this experimental in vitro study, buccal surfaces of 10 premolars were divided into three regions. one of the regions was etched with 37% phosphoric acid and another etched with e...

Journal: :Journal of the Society of Materials Science, Japan 1997

Journal: :Mathematics and Mechanics of Complex Systems 2014

2015
David R. Owen

ON THE NON-UNIQUENESS OF ELASTIC ROTATIONS FOR DEFORMATIONS OF MATERIALS WITH ELASTIC RANGE by David R. Owen In this note precise definitions of the concepts of permanent deformation, annealed state, and non-softening material are used to establish non-uniqueness of elastic rotations for deformations of certain materials with elastic range. ON THE NON-UNIQUENESS OF ELASTIC ROTATIONS FOR DEFORMA...

Journal: :IEICE Transactions 2014
Takafumi Tanaka Masahiko Jinno

Many detailed studies ranging from networking to hardware as well as standardization activities over the last few years have advanced the performance of the elastic optical network. Thanks to these intensive works, the elastic optical network has been becoming feasible. This paper reviews the recent advances in the elastic optical network from the aspects of networking technology and hardware d...

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