• 한국ITS학회 논문지
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• 제10권2호
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• pp.35-41
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• 2011

경찰청에서는 국내 교통문제를 해결하고 국제적 교통운영체계를 수립하기 위하여 "교통운영체계 선진화 방안"사업을 추진하고 있다. 본 연구는 교통운영체계 선진화 방안의 추진 효과를 분석하였으며, 그 결과 교통소통 및 교통안전측면에서 효과가 있는 것을 밝혔다. 그러나 정책에 대한 시민들의 낮은 인지도, 부적절한 현장적용 등으로 인한 교통사고의 위험 및 정체가중, 교차로 꼬리물기 위반행위 발생 등의 문제점들이 도출되었다. 현재 선진화 방안은 주로 직진우선신호, 비보호좌회전, 점멸신호 운영 등 교통신호운영 방법 개선을 위주로 추진되고 있는데, 향후 최종적으로 교통운영체계 선진화 모든 과제가 복합적으로 도입될 경우 현재 보다는 더 나은 효과를 기대할 수 있을 것이다.

• 한국정보처리학회논문지
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• 제4권11호
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• pp.2849-2860
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• 1997

본 논문에서는 소프트웨어 RAID 파일 시스템에서 효율적인 캐쉬 교체 정책들을 제안한다. 그리고 이와 기존의 캐쉬 교체 정책을 소프트웨어 RAID 파일 시스템에 적용한 정책들과의 성능을 다양한 환경에서 비교한다. 실험을 통해 우선 소프트웨어 RAID 파일 시스템에서 작은 쓰기 동작은 성능을 크게 저하시키는 요소임을 확인한다. 이러한 작은 쓰기 동작을 줄이는 캐쉬 교체 정책들을 제안한다. 이러한 교체 정책들에 대한 성능 비교는 트레이스 기반 시뮬레이션에 의해 수행된다. 실험 결과를 통해 본 논문에서 제안한 교체 정책들이 기존의 정책들 비해 효율적인 성능을 나타냄을 확인한다．

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.201-207
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• 2009

In this study, the domestic and abroad policies and regulations on the gas cooling systems have been analyzed. First, the current policies were investigated in Korea and other countries to stimulate the distribution of the gas cooling systems. The advantage and disadvantage for each policy were evaluated. Finally, several policies were proposed for the effective distribution of the gas cooling systems.

• 한국시스템다이내믹스연구
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• 제16권4호
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• pp.83-101
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• 2015

The purpose of this study is to illuminate the reason why community building policies by the Government seem to fail to work properly in Korea. The existing studies focus mainly on designing community building systems, thus they cannot provide plausible explanations about the cause of the unsuccessful outcomes from the policies. To overcome the limitations of the existing studies, the authors examine the implementation factors to influence the policy instruments with the perspective of policy implementation. By performing the analysis, the results imply the implementation factors, such as executer's competence, supports by related interests, incentive systems, and legal-institutional instruments, are important to influence the implementation performance of the relevant policy instruments. To make community building successful policies, The authors therefore suggest that the capacity of local administrators and residents should be raise, and one of which the way to enhance is to support research and program development by the resident-oriented living laboratory systems in localities.

• 산업공학
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• 제13권3호
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• pp.444-454
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• 2000

Due to the improvement of modern information technologies, sharing stock information among the supply chain members is a common practice nowadays. Many companies are planning to adopt the information systems to possess the real-time shared stock information. Thus, it is needed to quantify the value of shared stock information. The purpose of this paper is to evaluate the value of the shared stock information for two-echelon distribution systems. Existing reorder policies can be classified into installation stock policies and echelon stock policies. Since installation stock policies do not utilize the shared stock information, and both classes of policies may show poor performances for distribution systems, we cannot evaluate the value of the shared stock information with the existing policies. Thus, we provide a new type of reorder policy, named order risk policy. We define the order risk using marginal analysis, and prove the optimality. Through computational experiment that compares the order risk policy with the existing policies, it is shown that a significant cost reduction is achieved with the effective utilization of the shared stock information. We also show the effect of the system characteristics on the value of the shared stock information.

• 대한토목학회논문집
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• 제41권4호
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• pp.429-439
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• 2021

고령화로 인한 건설인력 감소에 대응하고 건설현장의 생산성 향상을 위해 일본에서는 2016년부터 정보통신기술을 활용한 자동화시공을 추진하고 있다. 일본 국토교통성은 ICT를 활용한 토공 자동화 시공을 뒷받침 할 새로운 비용 산정기준, 발주제도, 정부지원 정책을 마련하여 시행하고 있고 현장에서 활용할 수 있는 자동화 시공의 종류를 확대하고 있다. 우리나라도 ICT를 건설 현장에 원활하게 적용하기 위해서는 일본에서와 같이 우선적으로 ICT를 활용한 자동화 시공 관련 법과 제도, 정책 등을 정비해야 한다. 본 논문은 일본과 한국의 ICT를 활용한 자동화시공 관련 제도 및 정책을 비교·분석하여 벤치마킹하는 방법으로 연구하고 이로부터 시사점을 찾고자 했다. 연구 결과, 국내 건설현장에서 ICT기술을 활용하기 위해서는 한국 정부가 선도적으로 ICT기술 관련 비용 산정기준, 발주체계, 경제지원 정책 등을 마련해야 한다는 결론에 이르게 되었다.

• Journal of Communications and Networks
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• 제7권3호
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• pp.353-366
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• 2005

In future telecommunications systems, behaviour will be defined by inexperienced users for many different purposes, often by specifying requirements in the form of policies. The call processing language (CPL) was developed by the IETF in order to make it possible to define telephony policies in an Internet telephony environment. However, user-defined policies can hide inconsistencies or feature interactions. In this paper, a method and a tool are proposed to flag inconsistencies in a set of policies and to assist the user in correcting them. These policies can be defined by the user in a user-friendly language or derived automatically from a CPL script. The approach builds on a pre-existing logic programming tool that is able to identify inconsistencies in feature definitions. Our new tool is capable of explaining in user-oriented terminology the inconsistencies flagged, to suggest possible solutions, and to implement the chosen solution. It is sensitive to the types of features and interactions that will be created by naive users. This tool is also capable of assembling a set of individual policies specified in a user-friendly manner into a single CPL script in an appropriate priority order for execution by telecommunication systems.

• Journal of Communications and Networks
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• 제9권4호
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• pp.350-355
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• 2007

Border gateway protocol allows autonomous systems(ASes) to apply diverse routing policies for selecting routes and for propagating reachability information to other ASes. Although a significant number of studies have been focused on the Internet topology, little is known about what routing policies network operators employ to configure their networks. In this paper, we infer and characterize routing policies employed in the Internet. We find that routes learned from customers are preferred over those from peers and providers, and those from peers are typically preferred over those from providers. We present an algorithm for inferring and characterizing export policies. We show that ASes announce their prefixes to a selected subset of providers to perform traffic engineering for incoming traffic. We find that the selective announcement routing policies imply that there are much less available paths in the Internet than shown in the AS connectivity graph, and can make the Internet extremely sensitive to failure events. We hope that our findings will help network operators in designing routing policies.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.208-213
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• 2008

In this study, the policies to support reasonable use and effective distribution of air conditioning systems of ice storage type and natural gas type have been investigated. First, this study focused the current policy to stimulate the distribution of these air conditioning systems. Second, the advantage and disadvantage for the air conditioning systems of each type were evaluated. Finally, several policies are proposed for nationwide rational use of energy resources.

• 산업경영시스템학회지
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• 제47권2호
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• pp.190-197
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• 2024

By the recent fast growth of e-commerce markets, it has been stimulated to study order picking systems to improve their efficiency in distribution centers. Many companies and researchers have been developed various types of order picking systems and pursued the corresponding optimal operation policies. However, the performances of the systems with the optimal policies often depend on the structures of the centers and the operation environments. Based on a simulation model that mimics a unique zone picking system operated by a real company in the Republic of Korea, this study compares several operation policies and finds the most appropriate order selection rule and worker assignment policy for the system. Under all scenarios considered in this study, simulation results show that it is recommendable to assign more efficient workers to the zones with heavier workload. It also shows that selecting the order with the maximum number of non-repeatedly visited zones from the order list provides the most consistent and stable performances with respect to flow time, makespan, and utilization of the system even under the scenario with the breakdown zones. On the other hand, selecting the order with the minimum ratio of penalty to the number of zones performs the worst in all scenarios considered.