نتایج جستجو برای: modulus of variation

تعداد نتایج: 21187045  

2016
Lokesh Singh

Lokesh Singh1 1GD rungta college of Engineering & Technology, India [email protected] ABSTRACT A heterogeneous object is referred to a solid object made of different constituent materials. The object is made up of finite collection of regions having set of prescribed material classes of continuously or discontinuously varying material properties. These properties have an abrupt or gradual ch...

Journal: :Acta obstetricia et gynecologica Scandinavica 2014
Sara K Bastholm Naja Becher Peter R Stubbe Ioannis S Chronakis Niels Uldbjerg

OBJECTIVE To characterize the viscoelastic properties of cervical mucus plugs(CMPs) shed during labor at term. DESIGN Experimental research. SETTING Department of Obstetrics and Gynecology, Aarhus University Hospital, Denmark. POPULATION/SAMPLE Spontaneously shed CMPs from 18 healthy women in active labor. METHODS Viscoelastic properties of CMPs were investigated with a dynamic oscillat...

Journal: :international journal of nano dimension 0
s. saber samandari new technologies research centre, amirkabir university of technology, tehran, po box 1591633311, iran.

polymer-clay nano-composite materials, in which nano-meter thick layers of clay dispersed in polymer matrix, have generally higher mechanical properties than normal polymeric materials. a new three-dimensional unit cell model has been developed for modeling three constituent phases including inclusion, interphase and matrix. the total elastic modulus of nano-composite is evaluated.  numerical r...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1393

چکیده مقدمه تست حساسیت باکتریایی، به روش انتشار دیسک به خصوص در رابطه با باکتری های بیماری زای انسانی نقش عمده ایی در درمان آنتی بیوتیکی ایفا می کند. یکی از مهمترین عوامل تأثیر گذار بر نتیجه ی حاصل از آزمایش انتشار دیسک، نوع، ساختار وکیفیت دیسک مورد استفاده می باشد. هدف این پژوهش مقایسه ی کیفیت و میزان توافق دیسک های آنتی بیوتیکی سه شرکت mast، rosco و padtan teb با تاکید بر بدست آوردن میزان ت...

2012
G.S. Wilde H.J. Burd S.J. Judge

The paper describes a program of mechanical testing on donated human eye bank lenses. The principal purpose of the tests was to obtain experimental data on the shear modulus of the lens for use in future computational models of the accommodation process. Testing was conducted using a procedure in which deformations are induced in the lens by spinning it about its polar axis. Shear modulus data ...

Journal: :علوم و تکنولوژی پلیمر 0
وحید حدادی علی اکبر یوسفی محمدتقی گنجی مرتضی خسروی

in this investigation, the mechanical properties of the blends of blown bitumen110/10, heavy vacuum slops (h.v.s), bitumen 60/70 penetration grade and isotactic polypropylene (ipp) were studied for the first time. our results showed that modulus varies non-linearly and at certain asphaltenes contents a peak appears. considering these phenomena it is revealed that in the absence of ipp, interact...

2017

Measuring the elastic modulus of in-situ rock masses over scales of tens of meters remains an important challenge in experimental rock mechanics. We present a new approach using ambient resonance measurements of freestanding rock masses to identify vibrational modes, which are then matched with numerical models implementing bulk, globally representative material properties. The result is an exp...

Journal: :journal of dentistry, tehran university of medical sciences 0
sedigheh khedmat dental research center, dentistry research institute, department of endodontics, school of dentistry, tehran university of medical sciences, tehran, iran ; researcher, iranian center for endodontic research, tehran, iran. fatemeh momen-heravi malihe pishvaei

handling of endodontic sealers is greatly dependent on their elasticity and flow ability. we compared the viscoelastic properties of three root canal sealers.ah plus (dentsply, de trey, konstanz, germany), endofill (dentsply hero, petrópolis, rio de janeiro, brazil) and ah26 (dentsply, de trey, konstanz, germany) were mixed according to the manufacturers' instructions. the resulted pastes were ...

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