• International journal of advanced smart convergence
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• 제7권2호
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• pp.7-21
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• 2018

The author studied the process of unifying Hanja variant groups of Korea and China for LGR (Label Generation Rule) of Internet Top-Level Hangeul Hanja Domain and possible confusion between Hangeul syllable and Hanja character. Among 3518 Chinese variant groups, Korea and China need not review variant groups which include no or just one Korean Hanja character. Korea and China reviewed 304 Chinese variant groups (9% of the 3518 Chinese variant groups) which include two or more Korean Hanja characters. By doing so, Korea and China succeeded in efficiently unifying variant groups. Unification process of variant groups which is the main core of Korea-China coordination and almost final unification result is summarized in this paper. In addition, the author analyzed systematically whether some Hanja character could be confused with a Hangeul syllable and obtained a good result which was not expected at the beginning. Probably this kind of systematic analysis has not been performed in the past and seems the first attempt, which is one of the contributions of this paper. The author also reviewed how to express K-LGR in XML for submission to ICANN.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제5권1호
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• pp.7-16
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• 2016

이 논문은 인터넷 최상위 한자 도메인의 국제 생성 규칙(LGR)을 위하여 검토 대상 이체자 묶음 선정 방안을 연구한다. 한자 도메인의 국제 생성 규칙을 정하는데 있어 가장 어려운 점은 한자 이체자를 어떻게 처리할 것인가이다. 만일 이체자가 들어간 도메인들(보기: 동해국(東海國), 동해국)이 각각 다른 주소로 접속된다면 혼란이 일어나므로 같은 주소로 접속되는 것이 바람직하다. 그런데 한중의 이체자 묶음이 같지 않으므로 한중의 이체자 묶음을 통합할 필요가 있다. 이런 이유로 저자는 중국 이체자 묶음 3093개에 대한 검토 작업을 진행하다가 한국 한자가 전혀 없거나 한 글자만 있는 중국 이체자 묶음은 한국이 검토할 필요가 없음을 발견하였다. 한국은 중국 이체자 묶음 가운데 한국 한자가 2자 이상 있는 것만 검토하면 된다. 이렇게 함으로써 저자는 한국이 검토해야 할 중국 이체자 묶음의 개수를 3093개에서 303개로 줄일 수 있었는데, 이는 원래 중국 이체자 묶음 개수의 1/10 이다. 본 논문에서 제안한 방법에 따라 중국 이체자 묶음 303개에 대한 검토가 마무리되면 중국과의 협의를 통해 인터넷 최상위 한자 도메인의 국제 생성 규칙을 정하는 작업이 가속화될 것이다.

• TTA 저널
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• 통권51호
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• pp.108-117
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• 1997

현행 Internet 도메인 네임(domain name)에 대한 관리체계를 개선하기 위한 gTLD-MoU회의가 4월 29일부터 5월1일까지 스위스 제네바의 ITU본부에서 개최되었다. 현재 미국 독점으로 관리되고 있는 Internet top level domain name의 등록 및 관리체계를 전면적으로 개선하기 위해 개최된 본 회의는 지난해 11월 발족이후 이에 대한 검토작업을 진행해 온 IAHC(Internet International Ad Hoc Committee)의 주관으로 IANA, ISOC, ITU, WIPO를 포함, 전 세계로부터 101개 기관, 126명의 대표가 참석하였으며, 향후 Internet top level domain name의 등록업무 및 관리체계 개선에 관한 세부내용을 담은 양해각서(gTLD-MoU)에 대한 논의와 함께 80개 기관 대표가 서명에 참가한 가운데 gTLD-MoU에 대한 서명식을 가졌다. 한편, gTLD-MoU가 5월 1일로 정식 발효됨에 따라 ITU는 앞으로 gTLD-MoU의 관리기관(depository) 역할을 수행하게 되며, MoU 및 서명자 관리와 관련정보의 유통업무 등을 담당하게 된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권2호
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• pp.678-690
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• 2014

The current networks do not disclose information about a management domain due to scalability, manageability and commercial reasons. Therefore, it is very hard to calculate an optimal path to the destination. Also, due to poor information sharing, if an error occurs in the intermediate path, it is very difficult to re-search the path and find the best path. Hence, to manage each domain more efficiently, an architecture with top-level path computation node which can obtain information of separate nodes are highly needed This study aims to investigate a federation of a united network around NRN(National Research Network) that could allow resource sharing between countries and also independent resource management for each country. Considering first the aspects that can be accessed from the perspective of a national research network, ICE(Information Control Element) and GFO(Global Federation Organizer)-based architecture is designed as a top-level path computation element to support traffic engineering and applied to the multi-domain network. Then, the federation for the independent management of resources and resource information sharing among national research networks have been examined.

• 한국정밀공학회지
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• 제23권3호
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• pp.22-31
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• 2006

This paper introduces an approach to an ontology-based knowledge framework for product life cycle management (PLM). Participants in a product life cycle want to share comprehensive product knowledge without any ambiguity and heterogeneity. However, previous knowledge management approaches are limited in providing those aspects. Therefore, we suggest an ontology-based knowledge framework including knowledge maps, axioms and specific knowledge far domain. The bottom level, the axiom, specifies the semantics of concepts and relations of knowledge so that ambiguity of the semantics can be alleviated. The middle level is a product development knowledge map; it defines the concepts and the relations of the product domain common knowledge and guides engineers to process their engineering decisions. The middle level is then classified further into more detailed levels, such as generic product level, specific product level, product version level, and product item level for PLM. The top level is specialized knowledge fer a specific domain that gives the solution of a specific task or problem. It is classified into three knowledge types: expert knowledge, engineering function knowledge, and data-analysis-based knowledge. This proposed framework is based on ontology to accommodate a comprehensive range of unambiguous knowledge for PLM and is represented with first-order logic to maintain a uniform representation.

• International Journal of CAD/CAM
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• 제5권1호
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• pp.99-109
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• 2005

This paper introduces an approach to an ontology-based multi-level knowledge framework for a knowledge management system for discrete-product development. Participants in a product life cycle want to share comprehensive product knowledge without any ambiguity and heterogeneity. However, previous knowledge management approaches are limited in providing those aspects: therefore, we suggest an ontology-based multi-level knowledge framework (OBMKF). The bottom level, the axiom, specifies the semantics of concepts and relations of knowledge so ambiguity can be alleviated. The middle level is a product development knowledge map; it defines the concepts and the relations of the product domain knowledge and guides the engineer to process their engineering decisions. The middle level is then classified further into more detailed levels, such as generic product level, specific product level, product version level, and manufactured item level, according to the various viewpoints. The top level is specialized knowledge for a specific domain that gives the solution of a specific task or problem. It is classified into three knowledge types: expert knowledge, engineering function knowledge, and data-analysis-based knowledge. This proposed framework is based on ontology to accommodate a comprehensive range of knowledge and is represented with first-order logic to maintain a uniform representation.

• International Journal of Knowledge Content Development & Technology
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• 제12권3호
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• pp.31-49
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• 2022

The study presents a global research scenario in the domain of quantum sensing in quantitative and qualitative terms. The study is based on an analysis of 588 global publications in the field, sourced from the Scopus database for the period 1991-2020. The study identified key countries, organizations and authors, network collaborative linkages at national, institutional, and author level. In addition, it identified broad subject areas intersecting quantum sensing research, key journals for research communications, and broad characteristics of highly-cited papers. The study finds that the USA and Germany lead the world ranking in quantum sensing research with a combined share of 50% to the global output. The USA, Germany, and Italy are the home countries to 13 of the top 15 most productive organizations, and also the home countries to 14 of the top 15 most productive authors in the subject. The top journals publishing most research publications are Physical Review A, Physical Review Letters and New Journal of Physics. However, in the most cited journals list in the subject, Agriculture & Forest Meterology, Science and Physical Review A tops the list.

• 대한전자공학회논문지
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• 제26권8호
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• pp.1227-1237
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• 1989

In this paper, we propose a lossless progressive image transmission scheme using hierarchical pyramid structure and classified vector quantizer in DCT domain. By adopting DCT to the hierarchical pyramid signals, we can reduce the spatial redundance. Moreover, the DCT coefficients can be encoded efficiently by using classified vector quantizer in DCT domain. The classifier is simply based on the variance of a subblock. Also, the mirror set of training set of images can improve the robustness of codebooks. Progressive image transmission can be achieved through following processes: from top to bottom level of planes in a pyramid, and from high to low AC variance class in a plane. Some simulation results with real images show that the proposed coding scheme yields a good performance at below 0.3 bpp and an excellent result at 0.409 bpp. The proposed coding scheme is well suited for lossless progressive image transmission as well as image data compression.

• 한국정보과학회논문지:소프트웨어및응용
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• 제35권9호
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• pp.562-571
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• 2008

본 논문에서는 분야 온톨로지 구축을 위하여 분야 상위 온톨로지를 구축한 다음, 분야 시소러스의 개념과 관계를 이용하여 분야 상위 온톨로지를 확장하는 방법을 제안한다. 이를 위하여 우선 일반분야 시소러스와 분야 사전을 이용하여 분야 상위 개념 분류체계를 구축한다. 다음, 분야 시소러스의 개념을 분야 상위 온톨로지의 상위 개념으로 분류하고, 광의어(Broader Term: BT)-협의어(Narrower Term: NT) 및 광의어-관련어(Related Term: RT) 사이의 관계를 분야 상위 온톨로지에서 정의한 의미관계로 분류한다. 개념 분류는 두 단계로 진행되는데, 1단계에서는 빈도수 기반 방법, 2단계에서는 유사도 기반방법을 적용하여 시소러스 개념을 분야 상위 온톨로지의 개념으로 분류한다. 관계 분류에서는 두 가지 방법을 적용하였는데, (i) 훈련데이타가 부족한 경우를 위하여 규칙기반 방법으로 BT-NT/RT관계를 iso와 기타 관계(non-isa관계)로 분류하고, 다시 패턴기반 방법으로 non-isa관계를 온톨로지를 위한 의미관계로 분류한다. (ii) 훈련데이타를 충분히 가지고 있을 경우, 최대 엔트로피 모델(MEM)을 적용한 특징기반 분류 기법을 사용하되, k-Nearest Neighbors(k-NN)방법으로 훈련데이타를 정제하였다. 본 논문에서 제안한 방법으로 시스템을 구축하였고, 실험 결과 사람에 의한 판단 결과와 비교 가능한 성능을 보여 주었다.

• 제어로봇시스템학회논문지
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• 제11권2호
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• pp.152-159
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• 2005

This paper describes the application of a model-based system design method critical to complex intelligent systems, PSARE, to a welding robot development to define its top level architecture. The PSARE model consists of requirement model which describes the core processes(function) of the system, enhanced requirement model which adds technology specific processes to requirement model and allocates them to architecture model, and architecture model which describes the structure and interfaces and flows of the modules of the system. This paper focuses on the detailed procedure and method rather than the detailed domain model of the welding robot. In this study, only the top level architecture of a welding robot was defined using the PSARE method. However, the method can be repeatedly applied to the lower level architecture of the robot until the process which the robot should perform can be clearly defined. The enhanced data flow diagram in this model separates technology independent processes and technology specific processes. This approach will provide a useful base not only for improvement of a class of welding robots but also for development of increasingly complex intelligent real-time systems.