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Protection of Sports Right as of Basic Human rights and National Sport Promotion
SADAO MORIKAWA,황의룡,서상옥 한국스포츠엔터테인먼트법학회 2008 스포츠와 법 Vol.11 No.4
This shows the worldwide recognition of Sports right, but this does not literally mean that the idea of Sport for All has fully been realized all over the world. Immediately after the Charter had been adopted by UNESCO, I took part in the international conference on the subject of Sport for All held in Turin, Italy11 Sadao Morikawa, Another idea of Sport for all, "Taiikuka Kyiku", January 1980. and I heard a speech of Professor A. Wohl, Polish sports sociologist. He said : such a popularization of sports has been brought about and realized by a long period of struggles for workers' sport movement waged before and after the world war II, and the International Charter tells us that we still have a various kind of obstacles to the popularization of sports to be overcome. He also affirmed: as long as there really remains discrimination of class and race and there exist inequalities in the basic living conditions between the nations, particularly in the science and culture, the idea of Sport for All will be nothing but some kind of simple paper slogan if we fail to resolve them.
Stochastic interpolation of earthquake ground motions under spectral uncertainties
Morikawa, Hitoshi,Kameda, Hiroyuki Techno-Press 1997 Structural Engineering and Mechanics, An Int'l Jou Vol.5 No.6
Closed-form solutions are analytically derived for stochastic properties of earthquake ground motion fields, which are conditioned by an observed time series at certain observation sites and are characterized by spectra with uncertainties. The theoretical framework presented here can estimate not only the expectations of such simulated earthquake ground motions, but also the prediction errors which offer important information for the field of engineering. Before these derivations are made, the theory of conditional random fields is summarized for convenience in this study. Furthermore, a method for stochastic interpolation of power spectra is explained.
A Flexible Branch and Bound Method for the Job Shop Scheduling Problem
Morikawa, Katsumi,Takahashi, Katsuhiko Korean Institute of Industrial Engineers 2009 Industrial Engineeering & Management Systems Vol.8 No.4
This paper deals with the makespan minimization problem of job shops. The problem is known as one of hard problems to optimize, and therefore, many heuristic methods have been proposed by many researchers. The aim of this study is also to propose a heuristic scheduling method for the problem. However, the difference between the proposed method and many other heuristics is that the proposed method is based on depth-first branch and bound, and thus it is possible to find an optimal solution at least in principle. To accelerate the search, when a node is judged hopeless in the search tree, the proposed flexible branch and bound method can indicate a higher backtracking node. The unexplored nodes are stored and may be explored later to realize the strict optimization. Two methods are proposed to generate the backtracking point based on the critical path of the current best feasible schedule, and the minimum lower bound for the makespan in the unexplored sub-problems. Schedules are generated based on Giffler and Thompson's active schedule generation algorithm. Acceleration of the search by the flexible branch and bound is confirmed by numerical experiment.
Component Commonality and Order Matching Rules in Make-to-Forecast Production
Morikawa, Katsumi,Deguchi, Yusuke,Takahashi, Katsuhiko,Hirotani, Daisuke Korean Institute of Industrial Engineers 2010 Industrial Engineeering & Management Systems Vol.9 No.3
Make-to-forecast production is a way to realize high customization and fast responsiveness. This study firstly investigates the effect of introducing a common component in a make-to-forecast production environment. The common component can eliminate a modification step, which is a major cost component in make-to-forecast production. It is illustrated, however, that introducing a versatile component that merely covers several variants is unattractive, and thus adding values to the common component is inevitable in this environment. Secondly, an order-matching rule under the condition that two partially overlapped delivery lead time intervals exist is proposed. The rule considers the effect of matching orders to units that can cover both intervals. An alternative re-matching rule is also developed and examined. Numerical experiments clarify that the proposed rule generally realizes higher contribution ratio and lower percentages of orphans and rejected orders. The proposed re-matching rule increases the average contribution ratio at the expense of increased orphans and order rejections.