Abstract The uniaxial strain is an effective way to change the symmetry of a crystal and thus tuning their electronic properties. In present work, we elucidate physical mechanism symmetry-broken-induced energy valleys drift in monolayer molybdenum disulfide. When reduces rotational from C 3 1 in-plane electric field breaks balance electron distribution valleys, valley dipole can survive readily...

a palatal defect may result from surgical resection, and its consequences could include difficulty in speech and nasal regurgitation of food and liquids. an obturator combined to speech aid prosthesis can improve nasal emission during speech,  and  assist  in  preventing  nasal  regurgitation  of  food.  this  article presents a clinical report of the reconstruction of palatopharyngeal function...

ABSTRACT A key problem in protoplanetary disc evolution is understanding the efficiency of dust radial drift. This process makes observed sizes shrink on relatively short time-scales, implying that discs started much larger than what we see now. In this paper, use an independent constraint, gas radius (as probed by CO rotational emission), to test models. particular, consider ratio between and ...

Virtual reality displays introduce spatial distortions that are very hard to correct because of the difficulty of precisely modelling the camera from the nodal point of each eye. How significant are these distortions for spatial perception in virtual reality? In this study we used a helmet mounted display and a mechanical head tracker to investigate the tolerance to errors between head motions ...

The goal of this research is to investigate the problem of reconstructing a 3D representation of an environment, of arbitrary size, using a handheld color and depth (RGBD) sensor. The focus of this dissertation is to examine four of the underlying subproblems to this system: camera tracking, loop closure, data storage, and integration. First, a system for 3D reconstruction of large indoor plana...

Escherichia coli is a motile bacterium that moves up a chemoattractant gradient by performing a biased random walk composed of alternating runs and tumbles. This paper presents calculations of the chemotactic drift velocity v (d) (the mean velocity up the chemoattractant gradient) of an E. coli cell performing chemotaxis in a uniform, steady shear flow, with a weak chemoattractant gradient at r...

In this paper, we discuss a motion control of a twowheeled mobile robot. In the design of a controller for the system, a kinematic model is usually used; The wheels don’t skid at all and the mobile robot is regarded as a 3-dimensional 2-input nonholonomic system without drift. Many controllers based on the kinematic model have been proposed. However, in a real world, the wheels may skid on the ...