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.

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.

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

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

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

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.

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>

실내공간 저농도 CO₂ 포집을 위한 알칼리 함침 정전나노섬유 연구

정동원 ( Dongwon Jeong ),김상범 ( Sangbum Kim ),조영민 ( Youngmin Jo ) 한국공업화학회 2018 공업화학전망 Vol.21 No.4

Carbon nanofibers were electrospun from melamine-blended polyacrylonitrile (MACNFs), for improved indoor level CO₂ removal of the fibrous adsorbent. The dopant (melamine) was used to provide free and basic nitrogen functionalities, as well as to shorten the fabrication time of the nanofibers. Upon final CO₂ activation of the nanofibers, the specific surface area and microporosity were enhanced. As per chemical properties, the surface basicity was improved through the significant tethering of pyridone. The sample, MACNF-7 (10 mL polymer solution doped with 0.7 g melamine) provides the optimum doping ratio to achieve the highest CO₂ adsorption capacity of 3.15 mmol/g. This performance was based on simultaneous and just-adequate improvement of the microporosity (physical) and surface basicity (chemical) of the adsorbent. However, the selective adsorption of CO₂, in a binary mixture with nitrogen, showed the predominance of the improved chemical properties over microporosity; the highest CO₂ selective capture (1.22 mmol/g) was exhibited by applying CO₂ : N₂ of 0.15 : 0.85., with the selectivity fold of 58.19 at 273 K. In a 5-fold regeneration test, a stable and robust performance was achieved throughout the five cycles.

빅데이터 프로비넌스 표준화를 위한 현황 조사

정동원(Dongwon Jeong),온병원(Byung-Won On),정현준(Hyun-Jun Jung),이석훈(Sukhoon Lee),하수욱(Su-Wook Ha),이강찬(Kangchan Lee) 한국정보기술학회 2017 Proceedings of KIIT Conference Vol.2017 No.6

근거리 사용자 이동 경로 예측을 위한 빠른 알고리즘

정동원(Dongwon Jeong) 한국정보과학회 2014 정보과학회 컴퓨팅의 실제 논문지 Vol.20 No.3

이 논문에서는 빠른 근거리 예측 환경을 위한 사용자 이동 경로 예측 알고리즘을 제안한다. 지금까지 경로 예측 문제에 대한 많은 연구가 진행되어 왔다. 그러나 대부분 사용자의 최종 목적지 예측에 초점을 두고 있으며, 실시간으로 빠른 근거리 예측이 요구되는 응용에 적합하지 않다. 또한 기존 연구는 현재 사용자 정보를 이용하여 패턴 추출 및 학습이 불가능한 경우에 적용하기 어렵다. 따라서 이 논문에서는 이러한 기존 연구의 한계 극복을 위한 새로운 경로 예측 알고리즘을 제안한다. 제안 알고리즘에 적합한 정보 관리 구조를 정의하고 제안 알고리즘의 장점을 보이기 위해 성능 평가 결과를 보인다. This paper proposes a novel algorithm to predict user paths for fast and close-range prediction environments. Until now, much research has been conducted on the path prediction issue. However, most of this research focuses on prediction of the final destination of users and is not suitable for an application that requires a fast and close-range prediction in real time. The existing works also cannot be applied to a situation where a pattern extraction and reasoning with the current user information is not available. Therefore, this paper proposes a novel path prediction algorithm to overcome the limitations of the existing approaches. This paper defines a proper information management structure for the proposed algorithm, and a performance evaluation is conducted to show the contributions of the proposed algorithm.