• 한국수학교육학회지시리즈B:순수및응용수학
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• 제12권1호
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• pp.75-91
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• 2005

The main objective of this paper is to introduce the gradation of neigh-bourhoodness in L-fuzzy topology and to introduce the fuzziness in the concept of convergence of L-fuzzy nets.

• 한국컴퓨터정보학회논문지
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• 제18권4호
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• pp.141-152
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• 2013

현재 웹 구현체계는 절차지향 방식과 객체지향 방식으로 나누어 개발해 왔다. 이러한 두 방식 모두 단순한 외형적 디자인 구성과 하이브리드 웹에 대한 보조 쓰임새 역할 구성방식으로 구현되어 개발에 대한 시간과 인력의 소비로 야기 되는 비용 문제까지 나타나고 있다. 문제해결을 위한 방안으로 .NET Framework을 기반 하에서 적용할 수 있는 매니지드 구조화 시스템 프로그래밍 방식을 제안 했다. CS의 개념을 적용한 .NET기반의 구조화 시스템 설계방식은 UI 구성측면에서의 인터페이스 구성에 최적화된 디자인 구성을 우선시 적용하여 영역별 Class 분담형식을 취해 상속관계를 유지할 수 있는 환경을 제공하며, UX와 UI의 연계성을 유지하여 UX 객체의 인터페이스 구성을 객체와 연계를 통해 Class 설계과정에서 객체형식으로 적용하게 된다. 이러한 개발방식을 통해 UI UX 측면의 표현방식을 중심으로 구현 되고 개발에 따른 효율성 해결에도 도움을 갖게 되었다.

• Asia pacific journal of information systems
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• 제7권1호
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• pp.99-111
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• 1997

This paper presents an application of an artificial neural net to the implementation of decision class analysis (DCA), together with the generation of a decision model influence diagram. The diagram is well-known as a good tool for knowledge representation of complex decision problems. Generating influence diagram model is known to in practice require much time and effort, and the resulting model can be generally applicable to only a specific decision problem. In order to reduce the burden of modeling decision problems, the concept of DCA is introduced. DCA treats a set of decision problems having some degree of similarityz as a single unit. We propose a method utilizing a feedforward neural net with supervised learning rule to develop DCA based on influence diagram, which method consists of two phases: Phase l is to search for relevant chance and value nodes of an individual influence diagram from given decision and specific situations and Phase II elicits arcs among the nodes in the diagram. We also examine the results of neural net simulation with an example of a class of decision problems.

• 한국IT서비스학회지
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• 제19권1호
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• pp.1-16
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• 2020

Suncheon City Regeneration Project is known as the concept of cultural residents. Through the previous projects, the residents' capabilities have been improved, and the projects have been carried out according to their strategies. For this reason, participants in urban regeneration projects are important. The purpose of this study is to actually identify the 'rescue center' and 'direct relationship' with the analysis utilizing the characteristics of social networks NetMiner solution of the participants, who led the project, Suncheon. Surveys and interviews were conducted for participants, and the characteristics of social networks were analyzed in time series to quantify and visualize the results. As a result of the analysis, social networks were changed among the participants before and after the urban regeneration project. Initially, loose networks were denser over time, and initially networks formed only around participants were expanded over time. Network analysis has revealed that the system is strengthening with urban regeneration projects in the form of public and public-private cooperation. This highlights the need for a city-centered urban regeneration strategy centered on people and shows that a dense network of participants can be a success factor.

• 한국정밀공학회지
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• 제16권10호
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• pp.164-171
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• 1999

An optimum blank design technology is required for near-net of net-shape cold forming using sheets. Originally, the backward tracing scheme has been developed for preform design in bulk forming, and applied to several forming processes successfully. Its key concept is to trace backward from the final desirable configuration to an intermediate preform of initial blocker. A program for initial blank design in sheet forming which contains the capabilities of forward loading simulation by the finite element method and backward tracing simulation, has been developed and proved the effectiveness by applying to a square cup stamping process. In the blank design of square cup stamping, the backward tracing program can produce an optimum blank configuration which forms a sound net-shape cup product without machining after forming. Another general application appears in the blank design of a cup stamping with protruding flanges, one of typical automobile components. The blank configurations derived by backward tracing simulation have been confirmed by a series of loading simulations. The approach or decision of an initial blank configuration presented in this study will be a milestone in fields of sheet forming process design.

• 산업경영시스템학회지
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• 제46권4호
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• pp.272-280
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• 2023

For the past 70 years, an intense rivalry has persisted on the Korean Peninsula, and North Korea's nuclear and missile threats are becoming increasingly imminent. Facing a shortage of military resources, South Korea has pursued a national defense reform, significantly reducing the number of units and troops while focusing on ground forces. However, North Korea's strategic objective of unifying South Korea through surprise attacks, prompt responses, and combined nuclear and missile assaults remains unchanged. The central issue in this context revolves around determining the appropriate size of the Korean military's standing forces. This study employs the concept of net assessment as a novel method to ascertain the optimal size of the Korean military. Threats, strategic objectives, doctrine, and unit rotations are simultaneously considered from the enemy's perspective. In anticipation of security risks on the Korean Peninsula, an acceptable troop size will be proposed using the net assessment approach to calculate the appropriate standing force size.

• 한국환경과학회지
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• 제9권6호
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• pp.449-454
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• 2000

Sustainable development has been the key concept, both in economic policies and in environmental management. On the basis of an systems ecology perspective, this suggests the sustainable development of Korea\`s natural environment and economic activity using the EMERGY evaluation. The total EMERGY use(7,730E20sej/yr) in Korea is 81 percent from imported sources, fuels and goods and services. The ratio of outside investment to attracting natural resources is already large, like other industrialized countries. Continued availability of purchased inputs at a favorable balance of EMERGY trade, currently about 2.85 to 1 net EMERGY, tis the basis for present economic activity and must decrease as the net EMERGY of purchased inputs including fossil fuels goes down. EMERGY yield ratio and environmental loading ratio were 1.23 and 20.30, respectively. The population level is already in excess of carrying capacity. Its carrying capacity for steady state on its renewable sources is only 2.2 million people, compared to 45.9 million in 1977. EMERGY sustainability index is therefore less than one, which is indicative of highly developed consumer oriented economies. Until now the development of a country has been achieved by the economic growth, but it can be sustained in the long run by the use of renewable resource systems. the efficiency of energy usage, and the transformation of the social-economic structure based on an ecological-recycling concept.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (B)
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• pp.244-249
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• 2006

모바일 기기에서 수집된 데이터를 바탕으로 사용자의 기억을 되살리거나 사용자 맞춤형 서비스를 제공하기 위해서는 사용자가 하루 동안 수행한 수많은 행동이나 겪은 사건들을 기록할 필요가 있다. 그러나 사용자의 하루 동안 발생한 모든 일을 보여주기 보다는 사용자에게 있어서 중요한 일만 보여주는 것이 사용자의 행동을 분석하고 사용자에게 맞는 서비스를 제공하는 데 더 도움이 될 것이다. 이전의 연구에서는 키그래프를 이용하여 사용자의 하루를 요약하려고 시도하였으나 사용자로부터 얻은 데이터에 직접 키그래프를 적용한 결과로 얻은 데이터는 사람이 직관적으로 그 중요성을 이해하기 힘들었다. 이를 해결하기 위해 보다 상위 수준의 정보에 키그래프를 적용하였다. 본 논문에서는 스마트 폰에서 수집된 GPS 위치 정보를 장소정보로 변경하여 컨셉넷에 입력하고 관련된 개념을 추출한다. 컨셉넷(ConceptNet)은 수많은 어휘들의 연관관계를 의미망 형태로 표현한 것으로 사람이 일상생활에서 이용하는 상식을 포함하고 있다. 컨셉넷에서 추출된 개념들로 문서를 생성하고 생성된 문서에 키그래프 알고리즘을 적용하여 사용자가 수행한 행동에 관련된 개념 중 핵심적인 개념을 추출한다. 이렇게 추출된 개념들은 사용자가 하루 동안 수행한 행동이나 경험을 요약할 수 있는 정보가 된다. 3명의 사용자로부터 수집한 데이터로 제안한 방법의 성능을 평가해 본 결과, 직관적으로 중요한 경험에 관계된 개념을 얻을 수 있었다.

• 한국정보과학회논문지:데이타베이스
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• 제36권6호
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• pp.466-475
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• 2009

다양한 온톨로지 개발로 온톨로지간에 정보공유와 재사용이 필요하게 되면서 온톨로지 매핑에 관련된 연구가 활발이 이루어지고 있다. 온톨로지 매핑 기법으로는 어휘 유사성, 구조 유사성, 인스턴스 유사성, 추론 유사성 검사 기법으로 나누어진다. 이 중 어휘 유사성 검사 기법은 대부분의 온톨로지 매핑 연구에서 사용하는 기법으로써 주로 워드넷에 정의되어 있는 동의어 집합만을 사용한다. 이에 본 연구에서는 워드넷에 정의되어 있는 동의어 집합 외에 상위어, 하위어, 전체어, 부분어 집합의 모든 단어들을 포함한 수퍼워드셋을 정의하고, 이것을 이용한 온톨로지 매핑 기법을 제안한다. 실험 결과에 의하면, 제안된 기법은 기존 온톨로지 매핑 기법보다 평균 12%까지 온톨로지 매칭율을 높인 것을 보여준다.

• Nuclear Engineering and Technology
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• 제40권1호
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• pp.87-92
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• 2008

Tokamak reactor system analysis code was developed at KAERI (Korea Atomic Energy Research Institute) and is used here for the conceptual development of a DEMO reactor. In the system analysis code, prospects of the development of plasma physics and the relevant technology are included in a simple mathematical model, i.e., the overall plant power balance equation and the plasma power balance equation. This system analysis code provides satisfactory results for developing the concept of a DEMO reactor and for identifying the necessary R&D areas, both in the physics and technology areas for the realization of the concept. With this system analysis code, the performance of a DEMO reactor with a limited extension of the plasma physics and technology adopted in the ITER design. The main requirements for the DEMO reactor were selected as: 1) demonstrate tritium self-sufficiency, 2) generate net electricity, and 3) achieve a steady-state operation. It was shown that to access an operational region for higher performance, the main restrictions are presented by the divertor heat load and the steady-state operation requirements.