Murein, the rigid layer of the cell walls of almost all bacteria can be regarded as derivative of chitin. Within the sterically allowed region its polysaccharide chain can perform conformations with two-to threefold screw axes. Two dimensional Fourier transforms calculated from different possible conformations have been compared with data of density measurements, X-ray and elec­ tron diffractio...

Many model-driven diagnostic and correction procedures have been developed at SLAC for the on-line computer controlled operation of-SPEAR, PEP, the LINAC, and the Elec. tron Damping Ring. In order to facilitate future applications and enhancements, these procedures are being collected into a single program, GIANT. The program allows interactive diagnosis ss well as performance optimization of a...

A regenerative amplifier free-electron laser (RAFEL) is a highgain resonator FEL which achieves saturation in a few round-trips of the radiation in a high-loss, and hence low feedback, optical cavity. Because the radiation feedback fraction is low it is feasible that the use of low reflectivity optics in the resonator makes the RAFEL a candidate for short wavelength operation [1]. Several RAFEL...

Like middle-men in physical world, middle-agents assist in locating and connecting the ultimate (information or goods) provider with the ultimate requester in the electronic world. In this paper, we identify a basic list of dimensions along which middle-agents can diier from one other, and derive a taxonomy.

W artykule przedstawiono aktywność na sejmach i sejmikach szlachty województwa lubelskiego opowiadającej się po stronie Stanisława Leszczyńskiego. Badany okres obejmuje czas przedostatniego bezkrólewia oraz wojny o tron polski. Przeanalizowano proces zawiązania w województwie lubelskim partykularnej konfederacji obronie króla Leszczyńskiego grudniu 1733 roku udział przedstawicieli lubelskiej zj...

The neocognitron is an artificial neural network which applies certain aspects of the mammalian visual process to the task of 2-D pattern recognition. The resulting network model is complex in both structure and parameterization. We describe experiments which show that the performance of the neocognitron is sensitive to certain parameters whose values are seldom detailed in the relevant literat...

In this paper we report on spin-orbit coupling induced mag­ netokinetic effects on the free radical yield of triplet elec­ tron transfer reactions. From the magnetic field dependence ob­ served in a variety of mixed solvents the solvent dependent dy­ namics of short-lived triplet exciplexes is quantitatively de­ duced.

In this paper, I trace the evolution of the aircraft cockpit as an example of the transformation of a probabilistic environment into an ecological hybrid, that is, an environment characterized by both probabilistic and deterministic features and elements. In the hybrid ecology, the relationships among correspondence and coherence strategies and goals and cognitive tactics on the continuum from ...

Anonymity features of electronic payment systems are important for protecting privacy in an electronic world. However, complete anonymity prevents monitoring financial transactions and following the money trail, which are important tools for fighting serious crimes. To solve these type of problems several “escrowed cash” systems, that allow a “Trustee” to trace electronic money, were suggested....