• Journal of the Korean Society of Systems Engineering
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• v.1 no.1
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• pp.26-31
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• 2005

In order to care about preserving the environment for future generations, each country has been required to make the laws of the environment. So manufacturers must design, manufacture and sell goods that meet customer's need and must do this while meeting the needs of the environment. In this research we have developed product structure and configuration management system that treats electronic catalogs for recycling of train parts. This research focused on two system. One is JAVA-based electronic catalog that give the information about recycling of train parts. The other is product structure and configuration management system based on electronic catalog and Bill of Materials(B.O.M).

• Journal of the Korean Society for information Management
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• v.13 no.1
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• pp.103-117
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• 1996

The purpose of this study is to identify how users react with the search options and bibliographic information during search reformulation on the online catalog. Two online catalogs(N0TIS system and Dynix system) were selected and undergraduate students were recruited as the participants for this study. The study shows that the search options and bibliographic information affected the type of the query reformulation and the re-choice of the search options during search.

• Korean Journal of Computational Design and Engineering
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• v.3 no.3
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• pp.177-182
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• 1998

The computer related techniques have been developed rapidly in the field of metal removal industry. The electronic catalog for mechanical elements is one of such developments realized in recent years. As the emergence of the electronic catalogs in the 90s, it breaks the restriction of the traditional catalog and becomes a helpful and efficient tool in the field. In this paper, we develop an electronic catalog for the cutting tools of the Korea Tungsten Co. Ltd. The catalog consists of three parts: a preprocessor for tool selection, a database for tool, and a postprocessor for search result. A preprocessor for tool selection is developed under a user-friendly consideration. A database for tool consists of milling, drilling, and reaming tools with a list of cutters, inserts, and components. A postprocessor for search result consists of weight, dimension. drawing, product order number etc. of the tools. It also suggests the optimized cutting condition of the selected tool using a neural network technique which is done by an independent research group.

• IE interfaces
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• v.19 no.3
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• pp.225-235
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• 2006

In this paper, we propose an intelligent e-commerce meta-search engine which integrates distributed e-commerce sites and provides a unified search to the sites. The meta-search engine performs the following functions: (1) the user is able to create a category-based user query, (2) by using the WordNet, the query is semantically refined for increasing search accuracy, and (3) the meta-search engine recommends an e-commerce site which has the closest product information to the user’s search intention by matching the user query with the product catalogs in the e-commerce sites linked to the meta-search engine. An experiment shows that the performance of our model is better than that of general keyword-based search.

• Journal of The Korean Astronomical Society
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• v.47 no.5
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• pp.163-166
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• 2014

In order to identify peculiar X-ray sources, we select 442 sources with no counterparts in other wavelength bands (as of the year 1999) from the ROSAT All-Sky Survey Bright Source Catalog. We cross-correlate this initial list with the NASA/IPAC Extragalactic Database, the USNO and WISE catalogs, and the HEASARC XRAY Master Catalog. Eventually, we are left with four unidentified sources with no counterparts in other wavelength bands. We present these four sources and their X-ray properties in this paper.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.631-633
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• 2001

상거래의 상품 정보를 기술하는 카탈로그는 전자 상거래의 상품 인지단계에서도 중요한 역할을 하며 대부분의 인터넷 쇼핑 몰에서 전자 카탈로그 저장소의 구축과 유지를 위해 많은 비용을 소모한다. 전자 상거래가 활발해지고 인터넷 쇼핑 몰이 급격히 늘어남에 따라 구축과 유지에 많은 비용이 드는 전자 카탈로그 저장소를 고유할 필요가 생겨났으며, 그에 걸맞는 소프트웨어 아키텍처가 요구되고 있다. 이 논문에서는 서로 이질적인 전자 카탈로그 저장소들이 분산되어 있는 환경에서도 각각의 카탈로그들이 상호 연동할 수 있는 컴포넌트 기반 아키텍쳐를 제시한다. 이 아키텍쳐에서 컴포넌트들은 CORBA IDL을 통해 통신을 하며 이로써 이질적인 전자 카탈로그 저장소의 상호연동이 가능해지며 시스템의 신축성과 확장성 역시 높아지게 된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.171-174
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• 2001

인터넷의 발전과 전자상거래의 대중화로 인해 시간과 공간의 제약을 받지 않고 상품을 구매하는 고객들이 늘어나고 있다. 이로 인해 상품의 상세한 정보를 고객에게 제공하여 상품에 대한 흥미와 관심을 높일 필요가 있다. 그러나, 현재 대부분의 e-Catalog들은 상품의 정보를 단순한 텍스트나 이미지 중심으로 제공하고 있어서 상품에 대한 상세한 정보를 제공하는 데 한계를 지니고 있고 e-Catalog 저작자 또한 다양한 미디어 데이타를 이용하여 e-Catalog를 저작하기란 쉽지가 않다. 이러한 문제점을 해결하기 위해 기존의 e-Catalog에서 주로 사용되던 텍스트 및 이미지 외에 오디오나 동영상과 같은 동적인 멀티미디어 데이타를 폭넓게 활용하는 e-Catalog 저작 도구가 필요하다. 이를 위해 본 논문에서는 XML의 한 응용 분야인 동기화 멀티미디어 통합 언어 SMIL(Synchronized Multimedia Integration Language)을 이용하여 보다 진보된 e-Catalog를 쉽게 저작할 수 있는 e-Catalog 저작 방법 및 사례에 대해 기술한다.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.11a
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• pp.346-355
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• 2005

In this paper, we propose a meta-search engine which provides distributed product information through a unified access to multiple e-commerce. The meta-search engine proposed in this paper performs the following functions: (I) The user is able to create a category-based user query, (2) by using the WordNet, the query is semantical refined fined for increasing search accuracy, and (3) the meta-search engine recommends an e-commerce site which has the closest product information to the user's search intention, by matching the user query with the product catalogs in the e-commerce sites linked to the meta-search engine. An experiment shows that the performance of our model is better than that of general keyword-based search.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.2
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• pp.41.2-41.2
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• 2018

The Minkowski Functionals of the matter densityeld, as traced by galaxies, contain information regarding the nature of dark energy and the fraction of dark matter in the Universe. In particular, the genus is a statistic that provides a clean measurement of the shape of the linear matter power spectrum. As the genus is a topological quantity, it is insensitive to galaxy bias and gravitational collapse. Furthermore, as it traces the linear matter power spectrum, it is a conserved quantity with redshift. Hence the genus amplitude is a standard population that can be used to test the distance-redshift relation. In this talk, I show how we can extract the genus from galaxy catalogs, and how we can use its properties to constrain the equation of state of dark energy and the energy content of the Universe.

• The Bulletin of The Korean Astronomical Society
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• v.45 no.1
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• pp.29.3-29.3
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• 2020

Cosmology is a study to understand the origin, fundamental property, and evolution of the universe. Nowadays, many observational data of galaxies have become available, and one needs large-volume numerical simulations with good quality of the spatial distribution for a fair comparison with observation data. On the other hand, since galaxies' evolution is affected by both gravitational and baryonic effects, it is nontrivial to populate galaxies only by N-body simulations. However, full hydrodynamic simulations with large volume are computationally costly. Therefore, alternative galaxy assignment methods to N-body simulations are necessary for successful cosmological studies. In this talk, I would like to introduce the MBP-galaxy abundance matching. This novel galaxy assignment method agrees with the spatial distribution of observed galaxies between 0.1Mpc ~ 100Mpc scales. I also would like to introduce mock galaxy catalogs of the Horizon Run 4 and Multiverse simulations, large-volume cosmological N-body simulations done by the Korean community. Finally, I would like to introduce some recent works with those mock galaxies used to understand our universe better.