Supply chain managers in a growing number of companies are using optimization models to support factbased decision-making. Such models assist them in making better decisions about sourcing, manufacturing, transportation, warehousing, customer service, and inventory management across the geographically dispersed facilities and markets of their companies' supply chains. Imbedded in easy-to-use sy...

For the M=G=1 uid model the stationary distribution of the buuer content is investigated for the case that the message length distribution B(t) has a Pareto-type tail, i.e. behaves as 1 ? O(t ?) for t ! 1 with 1 < < 2. This buuer content distribution is closely related to the stationary waiting time distribution W (t) of a stable M=G=1 model with service time distribution B(t), in particular wh...

There is a long debate on the relative importance of spectral and temporal cues in speech perception theories. On the one hand, the highly-intelligible sine-wave speech (SWS) has been viewed as a representation of the global spectral structure of the speech signal. On the other hand, there is accumulating evidence showing that the temporal aspects of speech without spectral details provide suff...

1. Statement of results. Let SPW/ e" (0 <p <q) denote the complex obtained by attaching a g-cell e" to the ^-sphere Sp by means of a continuous map/: SQ~l—»Sp. Thus Sp^J/eq is the union of the mapping cylinder of/ with a cone over Sa_1. In this note we consider the problem of imbedding such a complex in euclidean space or, equivalently, in a sphere. It is clear that the mapping cylinder of/ can...

We construct exact solutions to Einstein equations which represent relativistic disks imbedded in an expanding FRW Universe. It is shown that the expansion influences the kinematical characteristics of the disks such as rotational curves, surface mass density, etc. The effects of the expansion are exemplified with non-static generalizations of Kuzmin-Curzon and Schwarzschild disks. Subject head...

Computer science has a curious history in Argentina: it began late (more than ten years later than in USA), had a ten-year span of flowering, was completely destroyed by the military dictatorship in 1966 and, disregarding some advances in small universities in the 1970s, began to weakly revive in 1983. In this article we shall analyze the ten-years long (1956-1966) “golden age” of computer scie...

Methods: Inspired by the ankle biomechanics, in which the hysteresis differs based on the gait speeds, a manually damping control mechanism imbedded in the prosthesis for adjusting the ankle damping at slow and normal walking speeds. The prototype was then preliminarily tested on an able-bodied subject wearing an adaptor which simulates the amputee walking. The ankle joint kinetics and kinemati...

In this article it is proven that if a knot, K, bounds an imbedded grope of class n, then the knot is ⌈ 2 ⌉-trivial in the sense of Gusarov and Stanford. That is, all type ⌈ 2 ⌉ invariants vanish on K. We also give a simple way to construct all knots bounding a grope of a given class. It is further shown that this result is optimal in the sense that for any n there exist gropes which are not ⌈ ...

A combination of heuristics, based on Tabu Search, first finds a solution in which no student has two exams simultaneously and then improves it by evenly spacing the exams in the examination period. The algorithm has been imbedded into a package to be used by Faculty administrators and proposes solutions to be considered by the parties involved: administration, departments and students. Computa...

Thin glass fibers imbedded into a glass cladding of slightly lower refractive index represent a promising medium for optical communication. This article presents simple formulas and functions for the fiber parameters as a help for practical design work. It considers the propagation constant, mode delay, the cladding field depth, and the power distribution in the fiber cross section. Plots vs fr...