One of the mantras risk measurement is avoidance concentration. However, most formal approaches to topic actually require more than this. In “Star-Shaped Risk Measures,” Castagnoli, Cattelan, Maccheroni, Tebaldi, and Wang study this property “in purity” for monetary measures. They show that it unites value at convex measures, amenable aggregation opinions, leads treatable optimization, thanks a...

The energy absorbing capability is one of the most important aspects of crushing behavior of a structure subjected to axial impact. In this paper, a simple practical method is introduced to enhance the crushing behavior of this kind of structure. The axial impact of metallic energy absorbing thin-walled tubes with special shaped cross-section is simulated using LS-DYNA software. The effect of c...

in this paper, we first present a new important property for bouligand tangent cone (contingent cone) of a star-shaped set. we then establish optimality conditions for pareto minima and proper ideal efficiencies in nonsmooth vector optimization problems by means of bouligand tangent cone of image set, where the objective is generalized cone convex set-valued map, in general real normed spaces.

the most promising method for micro scale energy scavenging is via vibration energy harvesting which converts mechanical energy to electrical energy by the effect of coupling between electric fields and mechanical variables. using piezoelectric cantilevers is the most common method for vibration energy harvesting. changing the shape of the cantilevers can lead to changing the generated output v...

Two new distinctive species of predaceous biting midges of the tribe Ceratopogonini are described and illustrated from the Middle East. Brachypogon freidbergi sp. nov., with a unique Y-shaped gonostylus, is recorded from Israel. We also provide the first records of Brachypogon vitiosus (Winnertz) and B. aethiopicus (Clastrier, Rioux & Descous) from this country, and a key to the adult males of ...