نتایج جستجو برای: surface effect

تعداد نتایج: 2188158  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2006
Min Hua Zhu Giovanni Carbone Charles Rosenblatt

A polyimide coated substrate is treated so that vertical liquid crystal alignment (theta=0) obtains over the temperature range T(NA)< T < T(a), where T(NA) is the nematic-smectic-A transition temperature. When the cell is filled with a chiral liquid crystal whose helical pitch is unwound (surface stabilized), application of an in-plane electric field for T(NA)< T < T(a) induces a nonzero polar ...

Journal: :Physical review letters 2002
Kari Enqvist Shinta Kasuya Anupam Mazumdar

We describe a new mechanism for reheating the Universe through evaporation of a surface charge of a fragmented inflaton condensate. We show that for a range of Yukawa coupling of the inflaton to the matter sector evaporation gives rise to a much smaller reheat temperature compared to the standard perturbative decay. As a consequence, reheating through a surface effect could solve the gravitino ...

1998
A. Novokhatski M. Timm T. Weiland

In the Linear Colliders FEL projects ultra short bunches are foreseen to be used. In addition to usual wakefields, coming from irregularities in the chamber, these bunches excite fields in transporting lines and undulators due to the surface roughness. This effect can be large for the extruded tubes, usually used in accelerators. Based on computer results it is shown, that the roughness wakefie...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد 1388

there is less published research about how teachers in efl contexts respond to students who are relatively less mature and less competent l2 writers. while writing researchers have examined various issues concerning peer and teacher response in writing-oriented classes, little research has centered on the effect of collaborative tasks particularly dictogloss on writing skills. output collaborat...

ژورنال: مهندسی دریا 2016

In this study, two-dimensional flow analysis around cross-section of the surface piercing propeller with a linear profile trailing edge is studied in different Weber numbers. Due to collision of the two-dimensional cross section with surface water, aeration zone is created on the suction side that is heavily impact on the results. The ventilation pattern is a function of the geometrical paramet...

Journal: :international journal of advanced design and manufacturing technology 0
shahriyar kournavand behnam motakef imani

the micro milling operation is one of the manufacturing processes, which can produce 3d parts in the range of less than a millimetre. miniaturization of components results in increasing the ratio of surface area to volume of components, which in turn increases the role of surface on the component performance. therefore, anticipating the relationship between micro milling parameters and surface ...

Journal: :journal of dental research, dental clinics, dental prospects 0
mohammad joulaei mahmoud bahari faculty of dentistry, tabriz university of medical sciences anahid ahmadi siavash savadi oskoee

background and aims. effect of surface treatments on repair bond strength of aged composite resins might be different due to their dissimilar fillers. the aim was to evaluate the effect of different surface treatments on repair micro-shear bond strength (µsbs) of silica- (spectrum tph) and zirconia-filled (filtek z250) composite resins. materials and methods. twenty-seven composite resin blocks...

DEEPAK SHROTRIYA, Ram Naresh Lal Srivastava Ram Shbad Yadav

Introduction: Megavoltage X-ray beams are used to treat cervix cancer due to their skin-sparing effect. Preferably, the radiation surface doses should be negligible; however, it increases due to electron contamination produced by various field parameters. Therefore, it is essential to provide proper knowledge about the effect of different field parameters on radiation doses. This study sought t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده ادبیات و علوم انسانی 1390

abstract: advertisements are the most accessible type of authentic materials, and this is one reason why they are used more and more in english teaching classes. for this cause, studies in the field of advertisements are very widespread nowadays. for pun is one aspect which makes advertisements more interesting, it is used more than before in advertisements. use of puns makes an advertisement m...

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