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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.
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.
GML 문서의 유효성 및 독립성을 고려한 지리공간 데이터 가시화 시스템 설계 및 구현
정동원(Dongwon Jeong),김장원(Jangwon Kim),안시훈(Si-hoon Ahn),정영식(Young-Sik Jeong) 한국IT서비스학회 2008 한국IT서비스학회지 Vol.7 No.1
This paper proposes a geospatial data visualization system supporting validation of GML documents. GIS systems manage and use both of spatial and non-spatial data. Currently, most GIS systems represent spatial data in GML (Geography Markup Language) developed by OGC. GML is a language for representation and sharing of spatial information, and until now many systems have been developed in GML. GML does not support expression of non-spatial data, i.e., relational information of spatial objects, and thus most systems extend GML to describe non-spatial information. However, it causes an issue that the systems only accepting standard GML documents cannot process the extended documents. In this paper, we propose a new GIS data visualization system to resolve the aforementioned issue. Our proposed system allows the representation of both types of data supporting independency of spatial data and non-spatial data. It enhances interoperability with other relevant systems. Therefore, we can develop a rich and high quality geospatial information services.
정동원(Dongwon Jeong),이유정(Yujeong Lee),이석훈(Sukhoon Lee) 한국정보기술학회 2021 한국정보기술학회논문지 Vol.19 No.5
Various studies have been conducted to resolve the growing social interest in the trash issue. Especially, drones and image recognition technologies are being applied to identify the distribution of trash. Accurate image acquisition must be prioritized to accurately identify the distribution of trash. In existing studies, research has been conducted on the effect of the altitude of a drone on the garbage recognition rate. However, the speed of a drone is also a very important factor. Therefore, this paper analyzes the effect of the drone speed on the image recognition rate and also defines the relationship between altitude, speed, and image recognition rate. The experimental results showed different results from the hypothesis that the slower the drone speed, the more accurate images will be acquired. The recognition rate was generally high at 2m/s, but the recognition rate was better at different speeds depending on the altitude. The research results of this paper can be used as basic data for related studies.