Ab initio direct dynamics was used to calculate product energy distributions for the F q C H TM C H F q H 2 4 2 3 reaction. A broad product translational energy distribution, similar to that observed experimentally, is found when the trajectories are initialized with a statistical vibrational energy distribution at the exit channel barrier. The trajectories show that, on average, orbital angula...

Equal-channel angular pressing (ECAP) combined with the Conform process provides a solution for the continuous production of ultrafine-grained materials. In the present study finite element method was executed to investigate the effects of die channel angle and friction on the strain homogeneity and the required torque in ECAP-Conform process. Deformation behaviour of Al 6061 wires was analyzed...

The propagation speed, shape and stability of the rim generated by a liquid-curtain breakup are studied. In experiment, liquid curtain surrounded slot die, edge guides surface roller breaks at contact point between guide in low-Weber-number range, propagates horizontal direction. Except for initial time, is almost straight has nearly constant speed. For an Ohnesorge number much smaller than 1, ...

This paper presents a recent characterization of the thrust efficiency and specific impulse of a low power, linear-geometry (non-coaxial) Hall thruster with an open electron-drift current. The thruster was constructed with a boron-nitride insulating channel surrounded by a magnetic circuit served by four electromagnet coils, and was designed to operate in the 100-Watt power class. A survey of t...

A new severe plastic deformation (SPD) based technique entitled Accumulative channel-die compression bonding (ACCB) is proposed for the fabrication of high strength multi-layered Al/Cu composites for the first time. In order to primarily demonstrate the capabilities of ACCB in the fabrication of metal matrix composites (MMCs), AA 1050 and pure Cu strips were processed. The primary Al/Cu sandwic...

BACKGROUND AND METHODS In Switzerland, nonmedical right-to-die organisations offer instruction and personal guidance in committing suicide to members suffering from incurable diseases. Suicide is usually committed with a lethal dose of barbiturates prescribed by a physician. This study is a retrospective analysis of all case files of assisted suicide kept during the period 1990-2000 by "Exit De...

Absfracl-In this paper, we propose a method for analysis of linear turbo equalization that makes use of extrinsic information transfer (EXIT) charts. Given channel knowledge and a timeinvariant set oi linear equalizer coefficients, evolution of soft information in the soft-input soft-output (SISO) equalizer can be estimated via analytically measuring the mutual inionnation between the transmitt...

The rate coefficient for the important interstellar reaction between CN and has been calculated 22 as a function of temperature between 10 and 300 K. The potential surface for this reaction has been determined through ab initio quantum chemical techniques ; the potential exhibits no barrier in the entrance channel but does show a small exit channel barrier, which lies below the energy of reacta...