In this paper we generalize the class of explicit partitioned Runge-Kutta (PRK) methods for separable Hamiltonian systems to systems with holonomic constraints. For a convenient analysis of such schemes, we rst generalize the backward error analysis for systems in I R m to systems on manifolds embedded in I R m. By applying this analysis to constrained PRK methods, we prove that such methods wi...

Some new macrocyclic dibenzotrioxadiamides, dibenzotetraoxadiamide, dibenzopentaoxadiamide, dibenzothiatrioxadiamide, tribenzotrioxadiamides and tetrabenzohexaoxadiamide (14-21), (26) and (27) have been prepared. These compounds were obtained in the macrocyclization step by reacting the diamine (4) with appropriak dicaxboxylic acid dichlorides (5-13) and (24). The cyclization does not requ...

The development of self-cleaving fusion-tag technology has greatly simplified the purification of recombinant proteins at laboratory scale. The self-cleaving capability of these tags has recently been combined with additional purification tags to generate novel and convenient protein purification methods at a variety of scales. In this review, we describe some of these methods, and provide a ru...

Growing amounts of multimedia data (alphanumeric, image, sound, and video) are being captured with the increasing deployment of a variety of sensors, as depicted in Figure 1. Data streams from sensors are being increasingly broadcasted via the Internet. We have proposed the image stack stream model or view of data as a convenient basis for both querying and visualizing the situation and changes...

As part of the RoboCup yearly competition, participants in the RoboCup Rescue Simulation League compete to solve a simulated urban search and rescue problem. For the last couple of years there has been debate about what metrics are best for selecting the competition winners. We statistically evaluate a variety of the metrics used and propose new ones,with the objective of determining which has ...

In article number 2006768, Hyukjin J. Kwon, Geunbae Lim, and Minsoo Lee introduce a multiscale-porous anion exchange membrane (MP-AEM), as an easily accessible anion-permselective material for the electrokinetic concentration of cationic species. The MP-AEM's highly streamlined fabrication process enables convenient cation-selective concentrator assembly, its demonstrated scalability shows grea...