Contour-parallel offset (CPO) machining uses successive offsets of the boundary curves of the machining region as the tool-path-elements (TPEs). For the efficiency of the CPO machining, it is very important to minimize the number of tool-retractions, which cause additional tool movements and do not contribute to the actual cutting. Presented in the paper is a CPO tool-path linking algorithm, wh...

INTRODUCTION. .. ............................................................... 417 Relative frequency of crossing over in males and females. ............................. 418 Previous investigations. ...................................................... 418 Crossing over between B b and Lg I , and between C c and Sh sh in microsporogenesis and megasporogenesis. .................................

This paper looks at the problem of endowment assurances which do not meet their targets to repay residential mortgages. Through the analysis of the present value of payments under different inflation and interest-rate regimes, we conclude that the perceived problems with endowment policies may simply be a manifestation of "money illusion". Nevertheless, there could frictional problems and other...

The polynomial algorithm for constructing a special Eulerian cycle in a plane connected 4-regular graph G = (V,E) is presented in the paper. First of all any cycle of the passed edges does not contain any unpassed edges (the condition of ordered enclosing (OE-cycle). At second, the next edge of this cycle can be chosen from one of two neighbouring edges (left or right) of a cyclic order for the...

VALADARES – AND CHASSIGNY: ONE EJECTION EVENT? E.V. Korochantseva 1,2 , S. P. Schwenzer 3,4 , A.I. Buikin 1,2 , J. Hopp 1 , U. Ott 3 , and M. Trieloff 1 , 1 Institut für Geowissenschaften, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 234-236, 69120 Heidelberg, Germany (e-mail: [email protected]), 2 Vernadsky Institute of Geochemistry, Kosygin St. 19, 119991 Mosc...

Cook's Theorem [Cormen, T.H., Leiserson, C.E., Rivest, R.L., 2001. Introduction to Algorithms, second ed., The MIT Press; Garey, M.R., Johnson, D.S., 1979. Computer and Intractability, Freeman, San Fransico, CA] is that if one algorithm for an NP-complete or an NP-hard problem will be developed, then other problems will be solved by means of reduction to that problem. Cook's Theorem has been de...

A correlation between diversity levels and rates of recombination is predicted both by models of positive selection, such as hitchhiking associated with the rapid fixation of advantageous mutations, and by models of purifying selection against strongly deleterious mutations (commonly referred to as "background selection"). With parameter values appropriate for Drosophila populations, only the f...

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1 はじめに 並列計算機システムへの汎用性(マルチユーザ・ マルチジョブ)導入による保護機能の実現や実資源 の仮想化は並列処理性能の大幅な低下の原因となる ため、現状の並列計算環境および並列計算機は基本 的にバックエンドプロセッサとしてバッチ処理で使 用されることが多い。つまり、ソフトウェアによる 様々な最適化方式の適用および軽い通信同期手法が システムの独占的使用を要求し、システムの柔軟か つ汎用的な使用形態と相容れないのである。 このような状況を改善するため、我々は 1989年 よりすべての CPUから等距離でアクセス可能な 集中共有メモリを持つ Uniform Memory Access (UMA)型並列計算機を対象にして、ユーザによ る最適化を支援する汎用オペレーティングシステム 核 SS{CORE [1]を研究開発してきた。 SS{CORE の研究においては議論を単純化する...