نتایج جستجو برای: chevron depth
تعداد نتایج: 161573 فیلتر نتایج به سال:
We characterize the director structures in electroconvection patterns of nematic liquid crystals by means of polarising microscopy. This study was stimulated by a theory put forward by Rossberg et al. [1] who propose a mechanism for chevron texture formation. We characterize the relation between the wave vector modulation and in-plane twist modulations of the director field. In addition to the ...
For over 25 years it is known that the roll structure of electroconvection (EC) in the dielectric regime in planarly aligned nematic liquid crystals has, after a transition to defect chaos, the tendency to form chevron structures. We show, with the help of a coarse-grained model, that this effect can generally be expected for systems with spontaneously broken isotropy, that is lifted by a small...
Introduction: The load-dependent collageneous fiber organization in the joint cartilage determines the biomechanical properties of this tissue. It has been shown that the deformation mechanisms of the collagen network under compressive load depend on the morphological and structural intactness of the cartilage [1, 2]. Thus, the analysis of load-reactions of joint cartilage could be a successful...
Background: Hallux valgus deformity is a common chronic problem in middle age and elderly. Different surgical procedures have been introduced so far with their proposed indications for each. This study aimed to compare three current procedures namely Chevron osteotomy, Scarf osteotomy and McBride technique. Methods: In this study, 44 patients were included from 2010 to 2013. All patie...
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