The late time structure of high density contrast, single mode Richtmyer-Meshkov flow

We study the late time flow structure of Richtmyer-Meshkov instability. Recent numerical work has suggested a self-similar collapse of the development of this instability at late times, independent of the initial surface profile. Using the form of collapse suggested, we derive an analytic expression for the mass-velocity relation in the spikes, and a global theory for the late time flow structure. We compare these results with fluid dynamical simulation.Comment: 10 pages, 5 figures. Phys. Fluids (in press

Welding torch and wire feed manipulator

Welding torch and wire feed manipulator increase capability for performing automatic welding operations. The manipulator rotates on its horizontal axis to avoid obstacles as they approach the torch. The initial individual attitudes of the torch and wire guide are set with respect to the general configuration of the part

Programs as Polypeptides

We describe a visual programming language for defining behaviors manifested by reified actors in a 2D virtual world that can be compiled into programs comprised of sequences of combinators that are themselves reified as actors. This makes it possible to build programs that build programs from components of a few fixed types delivered by diffusion using processes that resemble chemistry as much as computation.Comment: in European Conference on Artificial Life (ECAL '15), York, UK, 201

Monitoring of organic hay meadows to provide feedback for public access, biodiversity, and crop management

This paper was presented at the UK organic Research 2002 conference of the Colloquium of Organic Researchers (COR). The use of monitoring to provide feedback into the decision making of a management plan for a farm and nature reserve is described

Holographic stress analysis

Device for nondestructive testing of soldered joints correlates stress with load to predict printed circuit board lifetime

Trans-Pacific Partnership (TPP) Countries: Comparative Trade and Economic Analysis

[Excerpt] This report focuses primarily on U.S. economic interests in the TPP agreement. It provides acomparative economic analysis of the countries currently negotiating the TPP and describes the U.S. trade flows with these countries at the bilateral level and in relation to the countries’ economic linkages with the rest of the world. It also provides information on the existing trade agreements of TPP countries. As such, this report aims to serve as an introduction to the economic relationship these countries have, both individually and collectively, with the United States

Orbital tube flaring system produces tubing connectors with zero leakage

An orbital tube flaring system produces tubing connectors with a zero-leak potential needed in high pressure hydraulic and pneumatic systems. The flaring system incorporates a rolling cone and rolling die to closely control flare characteristics