• 지역연구
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• 제38권2호
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• pp.59-72
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• 2022

기후 변화와 보행자 권리에 대한 인식이 높아짐에 따라, 서울시는 차 없는 거리 정책을 적용하여 왔다. 특히 지자체와 민간은 도시 활력 증진과 소비자 유인이라는 공통의 이해관계에 따라 합의를 통해 차 없는 거리를 도입하고 있다. 하지만 국내의 차 없는 거리 정책에 대하여 정책의 효과를 실증적으로 살펴본 연구는 미비한 실정이며, 특히 COVID-19 이후 기간에서 차 없는 거리 정책을 살펴본 연구는 전무하다. 이에 따라 본 연구는 차 없는 거리가 도입된 상업 거리인 종로 52길에 대하여 통제집단합성법을 활용하여 정책의 효과를 평가하였다. 분석 결과, 종로 52길에서의 차 없는 거리 정책은 유입 인구 증대를 통해 도시 활력 증진에 유의한 효과가 있는 것으로 나타났다. 또한, 분석 결과에 따라 정책이 효과를 보이기까지 3개월가량이 소요된 점을 고려할 때 정책의 효과를 평가하기 위해선 적정한 시간 간격이 필요함을 시사했다. 그러나 정책 시행으로부터 1년이 경과하기 전에 종로 52길에서 생활인구 밀도 증가 효과는 유의하지 않게 나타났다. 또한, COVID-19 시기에는 합성통제지역보다 생활인구 밀도가 오히려 감소한 것으로 나타났다. 본 연구의 결과는 차 없는 거리 정책에 대해 보다 장기적인 관점의 인구 유입 전략과 감염병 확산 하에서 유연한 대응 방안이 필요함을 시사한다.

• 한국정보시스템학회지:정보시스템연구
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• 제22권4호
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• pp.49-69
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• 2013

Recently, enterprises have reinforced security control in order to prevent infringement of personal information and abuse of customer information by insiders. However, the reinforcement of security control by enterprises makes it difficult for internal users to perform business by using a business information system. There is, therefore, a need for research on various fields, which makes it possible to establish an appropriate security control policy while minimizing an impact on business. The present research verifies and analyzes an impact on difficulty in business of internal users using customer information, which is caused by security control performed by display restriction on customer information identifiers. The present research is intended to academically develop a technique for statistically analyzing an impact degree and a causal relationship between security control and an impact on business, which is a dichotomous variable, and to practically contribute to the establishment of an efficient security policy in consideration of an impact on business when an enterprise applies security control. A research target was internal business information systems of domestic securities enterprises, data was collected by questionnaire, and verification/analysis was performed by logistic regression analysis.

• 한국정보시스템학회지:정보시스템연구
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• 제6권1호
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• pp.223-256
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• 1997

Since the business scales of retailing companies become to be very large and the number of items dealt increases explosively, automation of inventory management becomes one of the most important issues to solve in retailing industry. In order to accomplish this automation of inventory management, there must be a great need to a method which can perform real-time decision making on inventory control in an automatic fashion, while communicating with inventory information systems like POS system and automatic warehousing system. But even in this circumstance, there are also many obstructions to such automation like varying demands, limited capacity of warehouse and exhibition room, need for strategic consideration on inventory control, etc., in a real sense. Due to these reasons, it seems very difficult that most large-scaled retailing companies get fully automated inventory management system. To overcome those difficulties and reflect them into inventory control, we propose a automated inventory control methodology for retailing industry based on neural network and policy model. Especially, policy model is devised to deal with dynamic varying demands and using this model, strategic goals on inventory can be considered into inventory control mechanism. Our proposed approach is implemented in workstation and its performance is also empirically verified also against to real case of one of the major retailing firm in Korea.

• 유통과학연구
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• 제19권12호
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• pp.91-101
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• 2021

Purpose: This study aims to explore the effects of government's value intervention messages on the prevention and control of infectious disease in the risk communication process in terms of goveremnt policy response to COVID-19 from the mismatch message perspective, and draws the relevant implicaitons. Due to the infeciton spread, some people point out that depression caused by COVID-19 is because of wrong signals of the government and infectious disease prevention and control authorities, namely value intervention messsages. Research design, data and methodology: This study examined the epidcmic situation through message deails regarding the effects of government's mismatch messages on prevention and control of infectious disease and the resulting phenomena. Results: People's lives are under serious threat overall, so the declaration of the end of COVID-19 is almost impossible unlike MERS. Economic downturn due to foreced prevention and control regulaitons of COVID-19, mistruct of social distancing, fatigue on mismatch messages, and moral hazard on the awareness of prevention and control of infectious disease are negative phenomena to risk communiaiton on COVID-19. Conclusions: This study investigated the government authorities' policy sending wrong signals due to mismatching of the reality at this point in time for infectious disease prevention and control from the risk communicaiton perspectrive.

• 한국의료질향상학회지
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• 제27권1호
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• pp.20-25
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• 2021

Purpose: The ability to access clinical trials for cancer treatment is important. This study investigated whether regional differences exist in oncologic clinical trial protocols conducted in South Korea. Methods: Records of all approved oncologic clinical trials conducted in 2019 were downloaded from the Republic of Korea Ministry of Food and Drug Safety. The study covered Seoul, the capital area, other metropolitan cities, and provincial areas. Descriptive statistics summarized the distribution patterns of clinical trials by region. Results: A total of 202 oncologic clinical trials were conducted in 63 institutions in 2019. Of these protocols, 186 (92%) were available in Seoul, 120 (59%) in the capital area, 64 (32%) in metropolitan cities, and 66 (33%) in provincial areas. More regional differences in protocol availability were observed in domestic trials, investigator-initiated trials, phase 1 and 2 trials, and smaller-scale trials. Conclusion: Most oncologic clinical trials were conducted in medical institutions located in Seoul, with the rest conducted in the capital area, metropolitan cities, and provincial areas. The findings reveal clear differences in protocol availability between Seoul and the other regions. Measures designed to improve geographical access to oncologic clinical trials may be needed given their growing importance in cancer treatment.

• Structural Engineering and Mechanics
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• 제38권1호
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• pp.39-63
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• 2011

Referring to the formulation of physical stochastic optimal control of structures and the scheme of optimal polynomial control, a nonlinear stochastic optimal control strategy is developed for a class of structural systems with hysteretic behaviors in the present paper. This control strategy provides an amenable approach to the classical stochastic optimal control strategies, bypasses the dilemma involved in It$\hat{o}$-type stochastic differential equations and is applicable to the dynamical systems driven by practical non-stationary and non-white random excitations, such as earthquake ground motions, strong winds and sea waves. The newly developed generalized optimal control policy is integrated in the nonlinear stochastic optimal control scheme so as to logically distribute the controllers and design their parameters associated with control gains. For illustrative purposes, the stochastic optimal controls of two base-excited multi-degree-of-freedom structural systems with hysteretic behavior in Clough bilinear model and Bouc-Wen differential model, respectively, are investigated. Numerical results reveal that a linear control with the 1st-order controller suffices even for the hysteretic structural systems when a control criterion in exceedance probability performance function for designing the weighting matrices is employed. This is practically meaningful due to the nonlinear controllers which may be associated with dynamical instabilities being saved. It is also noted that using the generalized optimal control policy, the maximum control effectiveness with the few number of control devices can be achieved, allowing for a desirable structural performance. It is remarked, meanwhile, that the response process and energy-dissipation behavior of the hysteretic structures are controlled to a certain extent.

• 한국콘텐츠학회논문지
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• 제8권11호
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• pp.25-32
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• 2008

접근 제어 기법은 모든 보호 입도 수준을 지원할 만큼 충분히 유연해야 한다. 또한 접근 제어 정책은 문서 타입과 관련하여 명세 될 가능성이 매우 높으므로, 문서가 기존의 접근 제어 정책에 의해 다루어지지 않는 상황을 적절하게 관리해야 한다. XML 문서에 관해서도 단순한 권한부여를 넘어서 좀 더 유연하게 정책을 기술하고, 선택할 수 있는 접근 제어 방법을 고려해야 한다. 본 논문은 XML 문서 접근을 위한 권한부여와 효율적인 관리를 위한 접근 제어 정책 시스템을 기술하고 설계하여 XML 자체의 능력을 활용하는 방법을 제안한다. 본 논문 시스템의 주요 특징은 특정 XML 문서에서 누가 어떤 접근 특권을 행사할 것인가를 고려하면서 조직 전반에 걸친 정책 관리자와 단일 문서 작성자의 요구를 원만하게 조정하는 것이다.

• 정보보호학회논문지
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• 제16권2호
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• pp.33-43
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• 2006

기관이나 기업은 효율적인 개인별 서비스를 위해 정보주체의 동의하에 개인정보를 수집 관리하고 있다. 그러나 데이터 베이스 관리자를 비롯한 정보사용자들은 저장된 개인정보를 무분별하게 접근하여 개인정보 오남용과 유출가능성을 높아지고 있다. 개인정보 보호를 위해 기관이나 기업이 자체 정책에 따라 개인정보에 대한 접근제어를 하는 시스템이라 할지라도 정보주체 자신의 정보에 대한 접근제어가 의도를 충분히 반영하기가 어렵다. 이 논문에서는 암호기법을 이용하여 정보사용자의 불법적인 접근을 차단하고 정보별로 접근제한을 할 수 있는 프라이버시 정책 기반의 접근제어 기법을 제안한다. 제안 기법에서 개인정보는 각기 다른 키로 암호화하여 데이터베이스에 저장된다. 정보주체는 자신의 정보 접근권한에 대한 정책을 세우며, 그 정책에 따라 정보사용자에게 키를 부여하므로써 정보 접근의 통제가 가능하다.

• 품질경영학회지
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• 제46권2호
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• pp.193-210
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• 2018

Purpose: The purpose of this study is to escape from the existing defense quality policy focused on government-led quality assurance for mass-produced items and to secure quality reliability of weapon systems through a defense quality policy paradigm shift based on designing a verification systems anchored on reliability through the enhancement of military supply quality control in the development stage, the enhancement of quality responsibility of the manufacturing contractor and other methods. Methods: For the shift to the quality-based defense quality policy, the status and the problems of the status quo are analyzed and the direction of future defense quality policy is suggested based on literature review of the concept of reliability and reliability in the field of defense, on case studies of global corporations and their quality policies, on the background on quality assurance in defense, and on case studies of quality policies in other government organizations, Results: Based on the case studies of quality policies in global corporations and other government agencies, the importance of preventive quality control from the early development stages, quality control based on the reliability of the materials and parts, and shift of the quality policy to a certification system to achieve these objectives were highlighted. Conclusion: To secure reliability of weapon system quality, the quality policy must be shifted to a system focused on reliability-based design and verification and there is a further need to enhance the operational efficiency and capacity of DTaQ based on studies and evaluation of weapon system reliability.

• 한국통신학회논문지
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• 제38B권5호
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• pp.355-367
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• 2013

3GPP와 WiMAX의 Policy and Charging Control(PCC) 표준에서는 정책제어 시스템(Policy and Charging Rule Function, PCRF)이 정책적용 시스템(Policy and Charging Rule Enforcement Function, PCEF)에 품질 및 과금 정책을 설정하고 관리함으로써 네트워크 자원을 제어하는 아키텍처를 정의한다. 본 논문은 PCRF 시스템과 PCEF 시스템 사이에서 정책 정보 불일치로 인해 발생하는 오류의 유형을 규정하고, 각 오류의 유형에 따라 PCRF 시스템의 정책 정보와 PCEF 시스템의 정책 정보를 동기화 시키는 방법을 제안한다. 그리고 WiMAX 표준을 준용하여 한국에 구축된 WiBro 시스템에서 각 기지국의 mobile VoIP(mVoIP) 수용량 관점에서 제안한 방법의 성능을 정량적으로 분석하였다. 제안한 방법은 삭제되지 않은 정책 정보로 인한 네트워크 자원의 낭비를 줄이고, 불필요한 정보의 누적으로 인해 발생하는 시스템의 부하, 메모리 누수, 시스템 정지 등과 같은 문제점들을 방지하고, PCC 서비스를 안정적으로 유지시켜 줌으로써 시스템의 성능을 향상시킨다. 우리는 이 방법을 실제 구현을 통하여 검증하였으며, WiMAX 표준에 반영시켰다.