과학기술정보를 위한 메타데이타 레지스트리 관리 시스템

정동원(Dongwon Jeong),신동길(Dongkil Shin),정은주(Eunju Jeong),김영갑(Young-Gab Kim),이정욱(Jeong Oog Lee),백두권(Doo-Kwon Baik) 한국정보과학회 2004 정보과학회 컴퓨팅의 실제 논문지 Vol.10 No.6

지금까지 ISO/IEC 11179를 기반으로 한 많은 메타데이타 레지스트리 관리 시스템들이 개발되었다. 그러나 기존 시스템들의 경우, 국제 표준인 ISO/IEC 11179 명세에 위배되거나 활용을 위한 필수 기능이 미비하다는 단점을 지닌다. 또한 핵심적인 구현 내용이 공개되지 않음으로써 국내 환경에 적합한 메타데이타 레지스트리 관리 시스템 개발에 어려움이 있다. 이 논문의 목적은 기존 시스템들의 문제점을 해결하고 원천 기술 확보를 위한 메타데이타 레지스트리 관리 시스템 개발에 있다. 또한 개발한 시스템을 과학기술정보 분야에 적용하여 실제 메타데이타 레지스트리를 구축 과정을 보인다. 개발된 메타데이타 레지스트리 관리 시스템은 크게 메타데이타 레지스트리 계층, 핵심 컴포넌트 계층, 확장 계층 및 서비스 인터페이스 계층으로 구성된다. 구현된 메타데이타 관리 시스템은 ISO/IEC 11179의 규칙을 준수하고 활용을 위한 필수적인 기능들을 포함하고 있다. 따라서 시스템 개발 프로세스 및 메타데이타 레지스트리 구축을 위한 지침서로서 이용될 수 있다. 또한 컴포넌트를 기반으로 설계 및 구현되었기 때문에 다양한 분야의 메타데이타 레지스트리 관리 시스템 개발을 위한 재사용이 용이하며 시스템 개발 시간과 비용을 감소시킨다 Many metadata registry management systems have been developed, which are based on ISO/IEC 11179. However, they do not follow the international standard, ISO/IEC 11179 nor provide some of mandatory functions. It is difficult to a develop metadata registry management system for domestic environment because of their hidden implementations. The goals of this paper are to solve the problems of the existing systems and to develop a metadata registry management systems for accumulation of primitive technologies. This paper also shows the metadata registry building process for the science and technology information field using the developed system. This system consists of Metadata Registry Layer, Core Component Layer, Extension Layer, and Service Interface Layer. The developed metadata registry management system follows ISO/IEC 11179 and contains mandatory functions for practical use. Therefore, it can be used as a guideline for building metadata registries and a development process of metadata registry management systems. We can easily reuse its components for development of metadata registry management systems in various fields because the system is designed and implemented based on the component-based development methodology. It also decreases time and cost for developing systems.

데이타 가시성 기반의 점진적 메타데이타 레지스트리 구축 방법론

정동원(Dongwon Jeong),신동길(Dongkil Shin),정은주(Eunju Jeong),이정욱(Jeong Oog Lee),서태설(Tae-Sul Seo),백두권(Doo-Kwon Baik) 한국정보과학회 2003 정보과학회 컴퓨팅의 실제 논문지 Vol.9 No.6

메타데이타 레지스트리는 동적인 메타데이타 관리와 다양한 이질적인 메타데이타간 상호운용성 증진을 위한 목적으로 개발되었다. 구축된 메타데이타 레지스트리는 새로운 데이타베이스 설계시 표준 지침을 제공함으로써 근본적이고 데이타 통합 메커니즘을 제공한다. 그러나 대규모 분산 데이타베이스에 대한 점진적인 통합을 위한 상황에서, 기 구축된 데이타베이스에 대한 인덱스를 생성하고 일관성 있는 표준 지침서인 메타데이타 레지스트리를 구축하는데 한계가 있다. 특히, 각 단위 데이타베이스에 대한 이용률 통계 정보 부재 및 단위 기간 내 주어진 비용이 제한된 경우, 우선적으로 통합할 데이타베이스 선택을 통한 점진적인 메타데이타 레지스트리의 체계적인 구축 방법을 제공하지 않는다. 이 논문에서는 이와 같은 환경에서, 점진적으로 메타데이타 레지스트리를 구축할 수 있는 방법론을 제안하고 점진적인 메타데이타 레지스트리 구축을 위해 데이타 가시성과 계층적 메타데이타 레지스트리 구조를 정의한다. 또한 정의한 개념, 구조 및 방법을 실제 도메인에 적용하기 위해 개발된 시스템과 적용한 결과를 기술한다. Metadata Registry was developed to dynamically manage metadata and to increase interoperability between various and heterogeneous metadata. The built metadata registry can be used as a standard guideline for creation of new databases and it provides a radical data integration mechanism. However, in the situation that an enormous databases must be integrated progressively, there is a limit to the existing metadata-based approach. In case that each database has no statistical information for its use rate and the restricted cost is given to us for a unit time, existing metadata- based approaches do not provide how to select some databases to be preferentially integrated and to build a metadata registry progressively. In this paper, we propose a methodology that can create progressively metadata registries in the case. The proposed methodology is based on data visibility and hierarchical metadata registry. We also describe the system that have been developed for applying the methodology to a real domain, and then described its results.

Implementation of Ontology Learning and Population System from Structured Data Sources : Standard-based Approach

Dongwon Jeong 보안공학연구지원센터 2013 International Journal of Software Engineering and Vol.7 No.6

Supporting Integrity of Mobile Agents during Transfer

Dongwon Jeong,Young-Gab Kim,Doo-Kwon Baik 대한전자공학회 2004 ITC-CSCC :International Technical Conference on Ci Vol.2004 No.7

Electrospun melamine‐blended activated carbon nanofibers for enhanced control of indoor CO₂

Jeong, Dongwon,Jie, Wang,Adelodun, Adedeji A.,Kim, Sangbum,Jo, Youngmin John Wiley Sons, Inc. 2019 Journal of applied polymer science Vol.136 No.28

<P><B>ABSTRACT</B></P><P>Electrospun carbon nanofibers were activated with melamine–polyacrylonitrile [melamine‐blended carbon nanofibers (MACNFs)] for use as a fibrous adsorbent for indoor CO<SUB>2</SUB> removal. Although, melamine doping was intended solely to incorporate basic nitrogen functionalities on the nanofibers, it also shortened fabrication time, conserving time, and energy cost. The specific surface area and microporosity of the fibers were enhanced from 412 m<SUP>2</SUP> g<SUP>−1</SUP> and 0.1646 cm<SUP>3</SUP> g<SUP>−1</SUP> to 547 m<SUP>2</SUP> g<SUP>−1</SUP> and 0.220 cm<SUP>3</SUP> g<SUP>−1</SUP>, respectively, upon final CO<SUB>2</SUB> activation of the nanofibers. With the chemical properties, we observed significant tethering of pyridine functionality. The sample, MACNF‐7 (10 mL of polymer solution doped with 0.7 g of melamine), provided the optimum melamine doping condition to achieve the highest CO<SUB>2</SUB> adsorption capacity of 3.15 mmol g<SUP>−1</SUP>. The adsorption performance was based on simultaneous improvement in microporosity (physical) and surface basicity (chemical) properties of the adsorbent. However, in a binary mixture with nitrogen, the selective adsorption of CO<SUB>2</SUB> showed the predominance of the improved surface basicity over microporosity. The highest CO<SUB>2</SUB> selective capture (1.22 mmol g<SUP>−1</SUP>) was occurred for a CO<SUB>2</SUB>:N<SUB>2</SUB> ratio of 0.15:0.85, with a selectivity of 58.19 at 273 K. In a regeneration test, stable and robust performance was achieved more than five cycles. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <B>2019</B>, <I>136</I>, 47747.</P>

Inhibition of Botrytis cinerea Spore Germination and Mycelia Growth by Frequency-specific Sound

Jeong, Mi-Jeong,Bae, DongWon,Bae, Hanhong,Lee, Soo In,Kim, Jin A,Shin, Sung Chul,Park, Sung Han,Park, Soo-Chul 한국응용생명화학회 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.4

The effect of sound waves on mycelial growth of Botrytis cinerea was investigated to explore whether frequency-specific sound could be used as a practical alternative to chemical fungicides to control plant diseases. The fungus was exposed to wave frequencies ranging from 1 to 5 kHz, and then observed using light and scanning electron microscopy to assess changes in several physiological and morphological aspects. Of the frequencies tested, 5 kHz sound wave significantly inhibited mycelial growth and spore germination. Furthermore, morphological changes, including low mycelial density, swollen mycelial tips, and irregular mycelial surfaces, were observed. Most internal hyphae were empty, and the ends of hyphae were significantly thinner or swollen. These observations suggest that 5 kHz sound waves create stressful growth conditions for the fungus, which leads to the inhibition of mycelia growth and spore germination. It is possible that sound wave treatment could represent an environmentally-friendly alternative to chemical fungicides. These results broaden our knowledge regarding the effective management of noxious nectrotrophic fungal pathogens by a non-chemical approach.

Framework for Seamless Interpretation of Semantics in Heterogeneous Ubiquitous Sensor Networks

Dongwon Jeong 보안공학연구지원센터 2012 International Journal of Software Engineering and Vol.6 No.3

Bax-induced cell death of Arabidopsisis meditated through reactive oxygen-dependent and -independent processes

Baek, Dongwon,Nam, Jaesung,koo, Yoon Duck,kim, Doh Hoon,Lee, Jiyoung,jeong, Jae Cheol,Kwak, Sang-soo,chung, Woo Sik,lim, Chae Oh,bahk, Jeong Dong,hong, Jong Chan,lee, Sang Yeol,Kawai-yamada, Maki,Uchi Springer-Verlag 2004 Plant Molecular Biology Vol.56 No.1

온톨로지 추론 모델에 독립적인 SPARQL 추론 질의 처리를 위한 재작성 알고리즘

정동원(Dongwon Jeong),Yixin Jing,백두권(Doo-Kwon Baik) 한국정보과학회 2008 정보과학회논문지 : 데이타베이스 Vol.35 No.6

This paper proposes a rewriting algorithm of OWL-DL ontology query in SPARQL. Currently, to obtain inference results of given SPARQL queries, Web ontology repositories construct inference ontology models and match the SPARQL queries with the models. However, an inference model requires much larger space than its original base model, and reusability of the model is not available for other inferrable SPARQL queries. Therefore, the aforementioned approach is not suitable for large scale SPARQL query processing. To resolve this issue, this paper proposes a novel SPARQL query rewriting algorithm that can obtain results by rewriting SPARQL queries and accomplishing query operations against the base ontology model. To achieve this goal, we first define OWL-DL inference rules and apply them on rewriting graph pattern in queries. The paper categorizes the inference rules and discusses on how these rules affect the query rewriting. To show the advantages of our proposal, a prototype system based on Jena is implemented. For comparative evaluation, we conduct an experiment with a set of test queries and compare of our proposal with the previous approach. The evaluation result showed the proposed algorithm supports an improved performance in efficiency of the inferrable SPARQL query processing without loss of completeness and soundness. 이 논문에서는 SPARQL로 작성된 OWL-DL 온톨로지 질의에 대한 재작성 알고리즘을 제안한다. 현재 웹 온톨로지 저장소는 주어진 SPARQL 질의의 추론 결과를 얻기 위해 추론 온톨로지 모델을생성하고 SPARQL 질의와 생성된 추론 온톨로지 모델과의 일치성을 비교한다. 추론 모델은 베이스 온톨로지 모델에 비해 보다 큰 공간을 필요로 하고 다른 추론 질의를 위해 재사용될 수 없기 때문에 앞서 언급한 접근 방법은 보다 방대한 크기의 SPARQL 질의 처리에 부적합하다. 이러한 문제점을 해결하기 위해 이 논문에서는 SPARQL 질의를 재작성하고 이를 기본 베이스 온톨로지 모델에 대해 질의 연산을 수행하여 결과를 획득할 수 있는 SPARQL 재작성 알고리즘을 제안한다. 이러한 목적을 이루기 위해, 먼저 OWL-DL 추론 규칙을 정의하고 이를 질의 그래프 패턴 재작성에 적용한다. 또한 추론 규칙들을 분류하고 이러한 규칙들이 질의 재작성에 미치는 영향에 대하여 기술한다. 제안 알고리즘의 장점을 보이기 위해, Jena 기반의 프로토타입 시스템을 구현한다. 비교 평가를 위해 테스트 질의를 이용하여 실험을 수행하고 제안 방법과 기존 접근 방법을 비교한다. 실험 결과에서, 제안 알고리즘이 완전성 및 정확성의 손실없이 메모리 공간 및 온톨로지 로딩 측면에서 향상된 성능을 보였다.

온도 성층화를 갖는 예혼합압축자기착화엔진에서 부스터 효과에 관한 수치해석

정동원(Dongwon Jeong),임옥택(Ocktaeck Lim),백영순(Youngsoon Baek) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5

The method of thermal stratification in cylinder is known for reducing rate of pressure rise, but which has its limit to extend the higher-load operating region of HCCI engines, giving an output of insufficient IMEP. High fueling rate could be one way to get the enough IMEP but it could be occurring engine knock. This work investigates the potential of in-cylinder thermal stratification for reducing the rate of pressure rise in DME HCCI engines, and the coupling between thermal stratification and booster effect to get reduced rate of pressure rise as well as high IMEP. The computations were conducted using Senkin application of the CHEMKINII kinetics rate code, and kinetic mechanism for Di-Methyl Ether (DME). DME has unique 2 stage reaction called Low Temperature Reaction (LTR) and High Temperature Reaction (HTR). Due to the heat release from LTR, the thermal stratification of in-cylinder would be formed just before HTR with large temperature difference so the heat release from oxidation reaction dispersed through combustion process. Intensity of intake pressure is closely concerned in input calorie which means a higher IMEP would be appeared without high fueling rate. The study also shows that increasing the in-cylinder thermal width of the charge between each zone would allow the booster pressure to be raised from 0.1 ㎫ to 0. 18㎫ to get the higher IMEP as well as high thermal efficiency with low emissions.