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박찬정 청주대학교 산업경영연구소 2006 産業經營硏究 Vol.29 No.5
This paper explores the relation between decision theoretic conceptions of risk and the conceptions held by managers. When dealing with a risky alternative whose possible outcomes are generally good (e.g., positive monetary outcomes), human subjects appear to be risk averse; but if they are dealing with a risky alternative whose possible outcomes are generally poor, human subjects tend to be risk-seeking. This pattern of context dependence ix familiar to risk taking of poker game. There are three major ways in which the conceptions of risk and risk taking held by managers lead to risk that are different from what might be expected from a decision theory perspective: ① Managers are insensitive to probability estimates of possible outcomes; ② Their decisions are particularly affected by the way their attention is focused on critical performance targets; and ③ They make a sharp distinction between taking risks and gambling. Risk preference varies with context. Specifically, the acceptability of a risky alternative depends an the relation between the dangers and opportunities reflected in the risk and same critical aspiration levels far the decision maker. The mast frequently mentioned values are a target level for performance (e.g., break-even) and a survival level. These two reference points partition possible states into three: success, failure, and extinction. In general, if one is above a performance target, the primary focus is on avoiding actions that might place one below it. The dangers of falling below the target dominate attention; the opportunities for gain are less salient. This leads to relative risk aversion on the part of successful managers, particularly those who are barely above the target. For decision makers who are, or expect to be, below the performance target, the desire to reach the target focuses attention in a way that leads generally to risk taking. If performance is well above the survival point, the focus of attention results in a predilection for relatively high variance alternatives, thus risk prone behavior. If performance is close to the survival point, the emphasis on high variance alternatives is moderated by a heightened awareness of their dangers.
朴贊政 단국대학교 대학원 1986 學術論叢 Vol.10 No.-
The fast Fourier transform is considered to owe its speed to the fact that a certain matrix, none of whose element is zero, can be factored into matrices with very many zeros. The paper describes and discuss a procedure for explicitly carrying out such a factorization.
영상회의를 위한 효율적인 비디오 트랜스코더의 설계 및 구현
박찬정,성동수,이건배 경기대학교 산업기술종합연구소 2004 산업기술종합연구소 논문집 Vol.28 No.-
In this paper, an efficient video transcoding algorithm is proposed for video conference. The existing techniques on a DCT domain produce to reduce video quality for a half pixel interpolation in macroblock units. A new algorithm which uses a half pixel interpolation in a block unit is proposed to prevent the decrease of video quality. A transcoder is implemented to support H.263v2 video codec using this algorithm. From the experimental results, a video quality is more improved than existing techniques.