It is well known that the instability of boundary layers is sensitive to the mean velocity profile, so that a small distortion to the basic flow may have a detrimental effect on its stability. The main interest of the present paper is in investigating the mechanisms by which a relatively weak distortion can significantly affect the instability of an otherwiseuniform Blasius flow. Specifically, ...

  Introduction: Geometric distortion is a major shortcoming of magnetic resonance imaging (MRI), which has an important influence on the accuracy of volumetric measurements, an important parameter in neurology and oncology. Our goal is to design and construct a new three- dimensional phantom using a 3D printer in order to measure geometric distortion and its reproducibility in...

the protein profiles of different iranian clinical isolats of dermatophytes (microsporum and trichophyton) were compared bv sds polyacrilamide ge! electrophoresis. although some of the protein patterns were common in both genuses, there were some genus specific protein profiles. abo within the species variety of distinct protein were profiles obtained. protein patterns can therefore distinguish...

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the purpose of this ex-post facto research is study about relationship between executive function and cognitive distortion on delinquent juveniles and non-delinquent juveniles in tehran. statistical sample are 62 delinquent juveniles selected by purposeful selection from “the center of modification and training” and 82 people of non-delinquent juveniles selected by method of random sampling fro...

Scanning and acquisition methods produce highly detailed surface meshes that need multi-chart parameterizations to reduce stretching and distortion. From these complex shape surfaces, high-quality approximations are automatically generated by using surface simplification techniques. Multi-chart textures hinder the quality of the simplification of these techniques for two reasons: either the cha...

We present an efficient information hiding algorithm for polygonal models. The decision to referencing neighbors for each embeddable vertex is based on a modified breadth first search, starting from the initial polygon determining by principal component analysis. The surface complexity is then estimated by the distance between the embedding vertex and the center of its referencing neighbors. Di...

Spectral evolution equations are used to perform analytical and numerical studies of nonlinear surface acoustic waves in the (001) plane of a variety of nonpiezoelectric cubic crystals. The basic theory underlying the model equations is outlined, and quasilinear solutions of the equations are presented. Expressions are also developed for a characteristic length scale for nonlinear distortion an...

The optic, electro-optic, and dielectric properties of antiferroelectric liquid crystals (AFLCs) are analyzed and discussed in terms of the local tilt plane orientation. We show that the so-called pretransitional effect is a combination of two different electro-optic modes: the field-induced antiphase distortion of the antiferroelectric structure and the field-induced reorientation of the tilt ...

This paper examines a steerable projection system, the everywhere displays projector (ED-projector), which transforms surfaces into interactive displays. In an ED-projector, the display image is directed onto a surface by a rotating mirror. Oblique projection distortion is removed by a computer-graphics reverse-distortion process and user interaction (pointing and clicking) is achieved by detec...