Strain distribution of Al 1100 was numerically investigated during cyclic expansion extrusion (CEE) process using finite element method (FEM). Die angle, corner fillet radius and die chamber diameter were considered as die parameters and friction factor and number of passes as process parameters. The effects of these parameters were investigated on the effective strain and strain homogeneity in...

* This material is based upon work supported by the National Science Foundation under Grant 9721358. Abstract Edgebreaker is a simple technique for compressing 3D triangle meshes. We introduce here a new formulation, which leads to a simple implementation. We describe it in terms of a data structure, the Corner Table, which represents the connectivity of any manifold triangle mesh as two table ...

We present the outcome of four-corner wrist arthrodesis using two headless compression screws for fixation. The study group consisted of 27 patients who underwent arthrodesis from 1998 through 2007. Data on demographic parameters, diagnosis, range of motion, pain and complications were collected from the medical files. A total of 77 series of anteroposterior, oblique, and lateral x-rays were re...

The usual decomposition of effects in corner solution models into extensive and intensive margins is generally incompatible with a causal interpretation. This paper proposes a decomposition based on the joint distribution of potential outcomes which is meaningful in a causal sense. The difference between decompositions can be substantial and yield diametrically opposed results, as shown in a st...

We study the instantaneous Stokes flow near the apex of a corner of angle 2a formed by two plane stress free surfaces. The fluid is under the action of gravity with gW parallel to the bisecting plane, and surface tension is neglected. For 2a.126.28°, the dominant term of the solution as the distance r to the apex tends to zero does not depend on gravity and has the character of a self-similar s...

Corner detection is a critical component of many image analysis and understanding tasks, such as object recognition matching. Our research indicates that existing corner algorithms cannot properly depict the difference between edges corners this results in wrong detections. In paper, capability second-order generalized (isotropic anisotropic) Gaussian directional derivative filters to suppress ...