• Electric Engineers Magazine
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• v.181 no.9
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• pp.35-39
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• 1997

에너지수요의 확대, 중장기적인 자원제약의 현재화 등에 따라 에너지의 안정공급확보 필요성이 점점 높아지고 있는 한편 에너지 소비의 증대에 의한 지구환경의 오염, 온난화 등이 세계적인 문제로 대두되고 있다.

• Journal of KIISE:Databases
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• v.36 no.3
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• pp.235-246
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• 2009

As demands intending to treat an access control on a client side that was conventionally controlled at a server are surged. it needs a way to treat query processing in effective and secure manners in an environment that has limited resources. Because the access control having been previously performed was only focused on safety, there was little effort to consider the access control in terms of efficiency. Researches about security including access control are started as the security issues are cropped up in a recent stream environment. This paper proposes a method for efficient and secure query processing of XML data streams like a PDA and a portable terminal at the client that is in limited resources. Specifically, this study suggests (1) an access control processing that possesses small overhead for attaining a secure result in a limited memory and (2) a way to enhance the performance, finding the parts being capable of optimizing in each processing step for offsetting the overhead caused by an addition of the access control processing. Superiority of the new method was analyzed by experiment.

• Korea Petroleum Association Journal
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• no.8 s.162
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• pp.34-36
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• 1994

정부는 지난 6월29일 과천청사에서 한리헌 경제기획원차관 주재로 경제행정 규제완화 실무위원회를 열고 석유정제업 등록을 허가제에서 등록제로 전환하고 석유제품 수출입 승인을 폐지하는 것등을 골자로 하는 통관제도ㆍ해운항만ㆍ환경산업ㆍ제약산업ㆍ에너지 및 자원산업 등 5개분야 70건의 행정규제완화 과제를 의결했다. 다음은 에너지 및 자원산업분야의 규제 완화 내용이다.

• The KIPS Transactions:PartA
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• v.9A no.3
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• pp.379-386
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• 2002

This paper presents a scheduling approach for synthesizing pipelined datapaths under resource constraints. Our approach builds up a schedule based on gradual mobility reduction in contrast to other algorithms of previous researches, where an operation being scheduled is selected by using a priority function. The proposed method consists of a scheduling algorithm and a decision algorithm for detecting any violation against resource constraints. Our approach evaluates whether or not a scheduling solution can exist in case an operation temporarily is assigned to the earliest or latest control step among the assignable steps for the operation. If a solution cannot be found, it is impossible to assign the operation to that step due to a violation against resource constraints, and so we can eliminate that control step. This process is iterated until a reduction of mobility for all operations can not be obtained. Experiments on benchmarks show that this approach gains a considerable improvement over those by previous approaches.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.5
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• pp.43-48
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• 2022

With the recent performance improvement of mobile devices as well as the emergence of various applications, not only interactive tasks but also real-time tasks are rapidly increasing. As real-time tasks have deadline requirements, resource management policies used in the conventional time-sharing systems have limitations in satisfying real-time constraints. In this paper, we examine how to efficiently manage resources while satisfying the constraints of real-time tasks through end-to-end resource management of CPU, memory, and storage when interactive and real-time tasks are executed concurrently on a mobile device. Instead of suggesting complicated resource management policies, we focus on examining the basic concepts necessary for each resource management. Specifically, we first look at basic policies such as assigning dedicated CPU cores for real-time tasks, allocating a certain working set of real-time tasks in memory, and using fast storage without context switch in I/O. We then consider how these basic policies can be adopted efficiently.

• KNOM Review
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• v.22 no.3
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• pp.25-30
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• 2019

For meteorological applications, meaningful results must be derived and provided within time and resource limits. Forecasts through numerous historical data are time-consuming and still have resource limitations in the case of disaster safety-related analyses/predictions such as local typhoon forecasts. Suitable forecasts should be provided without any problems caused by limited physical environmental conditions and when results are to be drawn under time constraints, such as typhoon forecasts and forecast services for flooded areas by road. In this paper, we analyze the application of weather and climate forecasting to provide a suitable forecasting service in both temporal and resource conditions. Through the analysis of execution time according to mesh sizes, it was confirmed that a mesh adjustment can cope with the case of the temporal constraint. In addition, by analyzing the execution time through memory resource control, we confirmed the minimum resource condition that does not affect the performance and the resource usage pattern of the application through the swap and mlock analysis.

• Environmental and Resource Economics Review
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• v.4 no.2
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• pp.345-381
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• 1995

생물서식지 보호나 산림보호 등을 목적으로 한 국제환경협약들은 향후 국내 가용 토지공급계획에 차질을 줄 수 있다. 즉, 토지공급의 제약은 지가상승과 직결되고 이는 우리나라 산업전반에 상당한 영향을 미치게 된다. 특히 우리나라가 최근 지가안정의 한 방법으로 택지개발 및 공급정책을 사용하고 있는 현실을 감안할 때 경제에 미치는 파급효과가 클 수 있다. 따라서 본논문의 목적은 국내 가용토지공급계획에 제약을 줄 수 있는 국제환경협약들을 살펴보고 예상되는 시나리오하에서 국민총생산 등 국내경제에 미칠 파급효과를 구체적으로 계량화하는데 촛점을 맞추고 있다. 이를 위해서는 토지공급과 토지가격, 그리고 각 거시변수들간의 연관관계를 동시에 파악할 수 있는 연립방정식 체계의 거시계량모형의 구축이 필요하다. 이러한 모형의 개발도 본논문이 갖는 의미 중에 하나일 것이다.

• Journal of KIISE:Information Networking
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• v.31 no.5
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• pp.460-468
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• 2004

Quality of Service (QoS)-constrained policy has an advantage to guarantee QoS requirements requested by users. Quorum systems can ensure the consistency and availability of replicated data despite the benign failure of data repositories. We propose a Quorum based resource management scheme, which includes a system resource and network resource, both of which can satisfy the requirements of application QoS. We also propose the resource reconfiguration algorithm based on temporal execution time estimation method. Resource reconfiguration means that reshuffling the current available resource set for maintaining the quality level of the resources. We evaluate the effectiveness of resource reconfiguration mechanism with a Heart Hemodynamics analysis. Our approach shows the increase of the stability of execution environment as well as decrease the completion time compare to the method that is not adapted the resource reconfiguration.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.556-559
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• 2004

본 논문은 제약이론의 프로세스 운영 개선기법에 기반하여 워크플로우에서 제약 자원을 찾고, 워크플로우의 운영 성과가 개선될 수 있도록 효율적인 업무 흐름 관리 방법을 개발하는 것을 목적으로 한다. 과거의 워크플로우 기록을 분석하여 제약업무담당자(CCP)를 결정하고, 제약 업무 담당자의 업무처리속도에 발생된 프로세스 인스턴스의 워크플로우 투입속도를 동기화하여 CCP의 업무부하가 일정수준으로 유지되도록 하며 비 제약 업무담당자의 여유능력이 향상되도록 한다. 이를 통해 CCP의 업무부하를 가능한 업무담당자들에 분산시킴으로써 프로세스 인스턴스의 처리가 원활히 이루어지도록 한다. 본 논문에서 개발한 알고리즘을 워크플로우 관리 시스템에 적용함으로써 전체 워크플로우가 효율적으로 운영되는 효과를 기대할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.217-219
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• 2001

WLAN은 다양한 정보와 자원을 공유할 수 있게 하는 LAN의 장점과, 제약 없는 연결성 제공이라는 편리성을 동시에 제공하고, 신뢰성 있는 data전송뿐만 아니라 유연성과 설치의 용이성을 장점으로 갖고 있다. 그러나 WLAN 이용하여 여러 어플리케이션을 사용할 때 제기되는 문제로 WLAN은 셀룰라 폰의 soft handover와 같은 mobility가 완전하게 지원되지 않으므로 WLAN 환경에서 VoIP 서비스 같은 실시간 서비스에 제약이 있다는 단점이 있다. 본 논문에서는 WLAN의 제약을 극복하기 위해 WLAN환경에서 이동단말의 이동성을 지원하기 위한 handover 방안을 제시하였다.