Criterion for contacting is critically important for the Generalized Interpolation Material Point(GIMP) method. We present an improved criterion by adding a switching function. With the method dynamical response of high melting explosive(HMX) with cavities under shock is investigated. The physical model used in the present work is an elastic-to-plastic and thermal-dynamical model with Mie-Grüne...

Optimization is seemingly everywhere and yet elusive. Our bodies, tools, institutions are now understood as endlessly optimizable. But what does optimization mean? Or more crucially, ...

Context. Particle-accelerating colliding-wind binaries (PACWBs) are systems that formed by two massive and hot stars produce nonthermal radiation. The key elements of these fast winds the shocks they create when collide. Binaries with nonaccreting young pulsars have also been detected as emitters, again a consequence wind–wind interaction. Black holes might radiation this mechanism if accrete a...

We present a time-dependent solution of the Nambu-Goto action which represents two colliding waves moving at the speed of light. This solution can be decomposed into two distinct regions with different geometries corresponding to shrinking or expanding brane universe and two colliding branes. The former describes the Big Bounce without singularity while the latter describes that two branes coll...

We are extending our biomechanics simulation toolkit, ArtiSynth [Fels 2006], with new methods relevant to surgical planning. Our research directions are focused on upper-airway and cranio-facial anatomy and predicting functional deficits associated with jaw surgery, such as mandible reconstruction [Curtis et al. 1997]. The principle features of ArtiSynth include simulation of constrained rigid-...

Copyright © 2015 Siamak Talatahari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Demand for lightweight, efficient, and low cost structures seems mandatory because of growing realization of the rarity of raw materials and...

We describe a technique to improve Smith’s branch-and-bound algorithm for the Euclidean Steiner tree problem inRd . The algorithm relies on the enumeration and optimization of full Steiner topologies for corresponding subsets of regular points. We handle the case of two Steiner points colliding during the optimization process—that is when there is a small enough distance between them—to dynamic...

The aim of this paper is to present a short survey of several new results concerning optimization of discrete inclusions. We study an optimization problem given by a discrete inclusion with end point constraints and we present several approaches concerning first and secondorder necessary optimality conditions for this problem.