• Title/Summary/Keyword: 통제도

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Simulation Analysis of Control Variates Method Using Stratified sampling (층화추출에 의한 통제변수의 시뮬레이션 성과분석)

  • Kwon, Chi-Myung;Kim, Seong-Yeon;Hwang, Sung-Won
    • Journal of the Korea Society for Simulation
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    • v.19 no.1
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    • pp.133-141
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    • 2010
  • This research suggests a unified scheme for using stratified sampling and control variates method to improve the efficiency of estimation for parameters in simulation experiments. We utilize standardized concomitant variables defined during the course of simulation runs. We first use these concomitant variables to counteract the unknown error of response by the method of control variates, then use a concomitant variable not used in the controlled response and stratify the response into appropriate strata to reduce the variation of controlled response additionally. In case that the covariance between the response and a set of control variates is known, we identify the simulation efficiency of suggested method using control variates and stratified sampling. We conjecture the simulation efficiency of this method is better than that achieved by separated application of either control variates or stratified sampling in a simulation experiments. We investigate such an efficiency gain through simulation on a selected model.

Effect of Locus of Control and Self-efficacy on Stress of Selected Dental Hygiene Students (일부 치위생과 학생의 통제소재, 자기효능감이 스트레스에 미치는 영향)

  • Lim, Soon-Ryun
    • Journal of dental hygiene science
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    • v.12 no.2
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    • pp.181-188
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    • 2012
  • The purpose of this study was to examine effect of locus of control and self-efficacy on stress of selected dental hygiene students. This study provides basic data to develop a method to reduce stress. The students of A women's college in Kyungi province majoring in dental hygiene were asked to answer the locus of control scale, self-efficacy scale, and stress level. As a result, this study concluded the following findings: 1. Locus of control scale was 8.77 and it meant the students used internal control. Self-efficacy scale was beyond median. In stress level category, mean of stress was 2.32, stress with friends was 2.05, stress with money was 2.33, stress with course in life was 2.29, stress with family members was 2.24, stress with study was 2.95. 2. Stress had negative relations with locus of control and self-efficacy. There was a positive relation between locus of control and self-efficacy. 3. Effect of self-efficacy on stress was significantly negative but effect of locus of control on stress was insignificant. In subscale, effect of self-efficacy and locus of control on stress with study was insignificant. 4. Indirect effect of locus of control on stress was statistically significant. The students with internal locus of control showed high self-efficacy and the students with high self-efficacy showed low stress level. In conclusion, educators should make an effort to reduce stress of students and understand the factors related to stress.

Interdependence of Corporate Governance Mechanisms and Managers' incentive-compensation system (기업 지배구조 통제장치와경영자 유인보상제도의 상호관련성)

  • Shin, Sung-Wook
    • Management & Information Systems Review
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    • v.35 no.1
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    • pp.287-305
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    • 2016
  • This study confirms that there is a correlation between managers' incentive-compensation system(introduction of the compensation committee) and corporate governance mechanisms (ownership structure, proportion of outside directors, debt ratio, competitive strength), and analyzes whether firm value is affected by corporate governance mechanisms. The purpose of this paper are empirically tested using 318 firm-year data listed on the KRX from 2001 to 2010 and 2SLS(two-stage least square method) were used for the analysis of the hypotheses. The results of empirical tests are as follows. Firstly, there is no correlation between introduction of the compensation committee and corporate governance mechanisms. In addition, the results show that there is a causal relationship between some variables. Secondly, results from the analysis of the impact of corporate governance mechanisms on firm value, only introduction of the compensation committee and foreign investors ownership were analyzed as a positive impact on the firm value. This result means that most domestic firm don't actively used for managers' incentive-compensation system as a useful control device for improving corporate governance.

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Control Networks for Information Systems Development : Organizational and Agency Theory Perspectives (조직 이론과 대리 이론 관점에서 본 정보시스템 개발의 통제 네트워크에 관한 연구)

  • Hong, Sa-Neung
    • Journal of Intelligence and Information Systems
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    • v.18 no.1
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    • pp.71-90
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    • 2012
  • Although it has been studied for a long time in various disciplines, most of control theories remain being developed by analyzing relatively simple tasks. Even recent research on control of information systems development explains only a small part of control phenomena observed in the real world projects. This research focuses on identifying and analyzing the concepts and structures in order to make them useful for understanding and explaining control of information systems development comprehensively This investigation utilizes the complementary relationship between views on control from organizational and economic perspectives. A conceptual framework developed by integrating previous research on control allows us to analyze the development of information systems for control purposes. The results of discussion about control mechanisms and network can be used as guidelines for designing control systems in real projects. Analysis of control networks shows that control of development projects requires quite complex networks intertwining a variety of controllers and controlees. The results of this research are expected to contribute to correcting the unbalanced status of IS research which has emphasized too heavily on planning and implementation, and deepening and widening our understanding about controlling development projects. Practitioners can use the results as guidelines for designing control mechanisms and networks, and get alerted by them about the agency risks inherent in outsourced developments.

Recent Progress and Tasks of Arms Control in South and North Korea (최근 남북한 군비통제의 추진현황과 과제)

  • Kim, Kang-nyeong
    • Korea and Global Affairs
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    • v.3 no.2
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    • pp.87-130
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    • 2019
  • This paper aims to analyze the recent progress(current situation) and tasks of arms control in North and South Korea. To this end the paper is composed of 5 chapters titled instruction; recent progress(current situation) of arms control in South and North Korea; constraints and tasks of arms control on the Korean peninsula; and conclusion. One of the most important tasks for the establishment of a peace structure for the coexistence of the Korean people in the 21st century is the realization of military control in order to resolve the acute military confrontation situation and mutual threats. With the 2018 PyeongChang Winter Olympics, the North-South summit and the subsequent talks for peace and denuclearization on the Korean Peninsula, the North Korea-US summit, and subsequent talks are creating conditions for trust building and arms control between the two Koreas. The military trust between the two Koreas and operational arms control are being achieved through the declaration of the April 27 Panmunjom and the 'Military Agreement for the Implementation of the Panmunjom Declaration.' However, since there are constraints on the control of arms control, such as the persistence of hostility and distrust of the two Koreas, the defense treaty between the two Koreas and neighboring countries, the competition of neighboring countries and the complex interests of the Korean peninsula, Trust Building is important. We should resolve the issue of arms control between the two Koreas, taking into account the trend of international arms control over the internal and external dynamics of the Korean peninsula gradually and carefully, with a vision of long-term unification security.

An Integrated Test of Interaction Effect between Causes and Internet Ethics of Smart Phone Cyber Bullying (스마트폰 이용에서 사이버폭력의 그 원인들 및 인터넷윤리의 통제효과에 대한 통합적 검증 연구)

  • Jang, Ha-Young;Lee, Seong-Sik
    • Informatization Policy
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    • v.26 no.2
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    • pp.46-61
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    • 2019
  • This study constructs an integrated model for university students' smart phone cyber bullying and tests interaction effects between causal and control factors. Causal factors include low self-control, differential association with cyber bullying peers, and victimization experiences; and control factors include internet ethics, perceived certainty of formal punishment, and bond to parents. This study focuses on examining how internet ethics buffers the effect of causal factors in cyber bullying. Results show that both differential association with cyber bullying peers and victimization experiences have significant effects on cyber bullying. And among the control factors, internet ethics only has a negative direct effect on cyber bullying. In addition, it is found that there are significant interaction effects between two causal factors - differential association with cyber bullying peers and victimization experiences - and internet ethics. It is also shown that there is a significant interaction effect between victimization experience and bond to parents, but a perceived formal punishment has no significant control effect. It is revealed that internet ethics is a main control factor in buffering the effects of causal factors in cyber bullying.

Multi Level-Role Behavior Based Access Control(ML-RBBAC) for Secure Operating Systems (안전한 운영체제를 위한 다중 등급-역할 행위 기반 접근통제)

  • Shin, Wook;Park, Chun-Goo;Kang, Jung-Min;Lee, Dong-Ik;Jung, Seung-Woog
    • Proceedings of the Korea Information Processing Society Conference
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    • 2001.10b
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    • pp.1005-1008
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    • 2001
  • 본 논문은 현재 안전한 운영체제 개발에 사용되고 있는 강제 접근통제(MAC)와 역할 행위 기반 접근통제(RBBAC)의 혼합 기법인 다중 등급 역할 행위 기반 접근통제(ML-RBBAC)를 제안하고, 접근통제 모델을 기술한다. ML-RBBAC은 안전한 운영체제가 MAC과 RBBAC을 동시 지원하기 위한 최적의 방법이며, 기존 MAC 의 단점인 지나치게 엄격한 정보흐름 통제 및 보안 관리 부담의 증대 문제를 해결한다.

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Decoupling Control of Three-tank Liquid Level Systems Based on Feedforward Compensation (Feedforward 보상에 근거한 3개의 탱크 액체 레벨 시스템의 통제 분리)

  • Shi, Xue-Wen
    • 전자공학회논문지 IE
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    • v.45 no.3
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    • pp.36-41
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    • 2008
  • By considering decoupling between loops as a kind of measurable disturbance, a steady-state decoupling method based on feedforward compensation is proposed for a three-tank liquid level system often encountered in practical process control. In addition, the three-tank liquid level system's dynamic model with structure of two-input and two-output is presented according to its working principle. Finally simulation experiments given in C++Builder language demonstrate the effectiveness of the proposed method.

ML/RBBAC (Multi-Level/Role-Behavior Based Access Control) (ML/RBBAC (Multi-Level/Role-Behavior Based Access Control) 접근통제)

  • Shin, Wook;Lee, Dong-Ik
    • Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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    • 2001.11a
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    • pp.396-400
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    • 2001
  • 본 논문은 현재 안전한 운영체제 개발에 사용되고 있는 강제 접근통제(MAC)와 역할행위 기반 접근통제(RBBAC)의 혼합 기법인 다중 등급 역할 행위 기반 접근통제 (ML/RBBAC)를 제안하고, 접근통제 모델을 기술한다. ML/RBBAC은 안전한 운영체제가 MAC과 RBBAC을 동시 지원하기 위한 최적의 방법이며, 기존 MAC의 단점인 지나치게 엄격한 정보흐름 통제 및 보안 관리 부담의 증대 문제를 해결한다.

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International Joint Venture Business Performance According to Type of Control (통제유형에 따른 국제합작사업성과)

  • lee, Won-hee;Moon, Jae-Young
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2018.07a
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    • pp.252-253
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    • 2018
  • 본 연구는 우리나라의 국제합작투자 기업들을 대상으로 국제합작 사업에서의 합작파트너 간 통제유형(산출(Output Contro), 과정(Process Control), 사회적(Social Control))에 따라 국제합작투자 기업의 성과에 어떠한 영향을 주는지를 살펴보고자 하는 실증연구이다. 국제 합작기업들간의 투자형태가 다양하기 때문에 통제유형에 따라 국제합작투자사업 성과에 어떠한 유의한 영향을 미치며 또한, 한국합작투자기업들만이 가지는 특징을 실증분석을 통하여 알아보고자 한다.

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