• Proceedings of the Korean Society of Computer Information Conference
• /
• 2012.07a
• /
• pp.309-310
• /
• 2012

최근에 웹 온톨로지 언어를 사용한 웹 서비스와 애플리케이션들이 많이 개발됨에 따라 RDF/S를 기반으로 한 온톨로지 문서의 크기가 증가되었고 이로 인해 효율적으로 문서를 저장하고 검색하기위한 시맨틱 웹 정보관리 시스템의 필요가 대두되었다. 본 논문에서는 시맨틱 웹 정보관리 시스템에서 클래스와 프로퍼티의 삭제 알고리즘을 제안한다. 제안한 삭제 알고리즘에서는 클래스나 프로퍼티가 삭제될 때에 이를 반영하여 계층 정보의 스키마 정보가 변경된다.

• Journal of Conservation Science
• /
• v.32 no.2
• /
• pp.215-221
• /
• 2016

This study conducted analysis of paint samples from defense industries equipments of Korean Conflict in The War Memorial of Korea to identify the characteristics of the modern paint. The samples were analyzed by microscopic observation, infrared spectroscopy and SEM-EDS. Cross-section of paint samples are made up of several layers of about 9 to 20 times, and thickness of the layer is not uniform in the $10{\sim}100{\mu}m$. The putty was used for the surface treatment before painting. Inorganic analysis showed that one type of the putty consist of minium and kaolin, talc, titanium dioxide. According to the results of infrared spectroscopy, paint samples were identified as alkyd resin. Some bands such as C-H bending, C-O and C-C stretching, C-H rocking were found in spectra.

• Journal of KIISE
• /
• v.42 no.12
• /
• pp.1568-1574
• /
• 2015

Relation extraction plays a role in for the process of transforming a sentence into a form of knowledge base. In this paper, we focus on predicates in a sentence and aim to identify the relevant knowledge base properties required to elucidate the relationship between entities, which enables a computer to understand the meaning of a sentence more clearly. Distant Supervision is a well-known approach for relation extraction, and it performs lexicalization tasks for knowledge base properties by generating a large amount of labeled data automatically. In other words, the predicate in a sentence will be linked or mapped to the possible properties which are defined by some ontologies in the knowledge base. This lexical and ontological linking of information provides us with a way of generating structured information and a basis for enrichment of the knowledge base.

• Annual Conference on Human and Language Technology
• /
• 2014.10a
• /
• pp.139-142
• /
• 2014

시맨틱웹의 구현 도구로써 온톨로지가 있다. 온톨로지는 지식개념의 의미적 연결을 하는데 사용된다. 영어 위키피디아를 토대로 한 영어 DBpedia 온톨로지는 스키마(owl파일 형태)와 인스턴스 모두 잘 구축이 되어있다. 그리고 영어 DBpedia의 각 Class에 한글은 레이블의 형태로 달려있다. 하지만 한글 레이블을 가지고 있지 않은 영어 DBpedia의 Class들이 절반이 넘기 때문에 한글 Class들만으로 된 스키마 구축은 의미가 있다. 한글 Class들로 만들어진 스키마가 있다면 두 한글 온톨로지 사이의 클래스 매칭 알고리즘을 위한 실험이나 한글 온톨로지 자동 증강 알고리즘의 연구 등에 유용하게 쓰일 수 있을 것이다. 본 논문에서 구축한 한글 DBpedia 온톨로지 스키마는 영문 DBpedia 온톨로지의 계층구조와 한글 클래스와 영문 클래스 사이의 매핑정보를 바탕으로 구축되었다. 그리고 기존에 제공되는 한글 DBpedia 온톨로지 클래스의 영어매핑 정보가 있는 한글 프로퍼티와 영어매핑 정보가 없는 한글 프로퍼티를 모두 한글 클래스의 프로퍼티로 입력해주었다.

• Analytical Science and Technology
• /
• v.23 no.2
• /
• pp.109-118
• /
• 2010

Amended at the Law of indoor air quality management open a court according to the test method and excess standard of the fluid building material were changed. It used the paint and the putty in the fluid building material from this research and comparison of amended and original method it led and in about change direction of amended standard with change of the emission rate who is caused by in the amended test method and excess standard it examined. The reduction emission rate about 45% decreases in the change of test period of the paint, there was not an effect of the emission rate whom it follows in change of dry time. Also change of the emission rate whom it follows in change of application quantity the product which above $5\;mg/m^2h$ has the high emission rate the change of the emission rate is big but there was not change of the emission rate from the products of that others. The putty the emission rate about 61% decreases in case in the change of test period, there was not an effect of the emission rate whom it follows at dry time. The emission rate about 164% increased with increase of application quantity. It tried to compare two test methods, it compared in the paint and putty all current test method it was relaxed the possibility of knowing the thing there was a standard.

• Proceedings of the Korean Information Science Society Conference
• /
• 2005.07b
• /
• pp.223-225
• /
• 2005

시맨틱 웹의 구현을 위한 수단으로 RDF 및 기타 기반 기술이 사용되고 있다. 이에 따라, 방대한 RDF 데이터의 효율적인 관리를 위한 연구들이 최근 활발하게 국내외에서 진행 중이다. 기존의 많은 연구들은 관계형 데이터베이스 시스템을 이용하여 트리플 형태의 RDF 데이터의 저장하는 방법을 제안하였다. 이러한 방법은 하나의 대규모 테이블상에 RDF 데이터를 저장하므로 데이터 관리측면에서 장점이 있으나 질의 처리 측면에서 볼 때 항상 테이블 전체를 접근해야 하므로 검색 성능이 저하될 수 있는 문제점이 있다. 본 논문에서는 질의 처리 성능을 높이기 위해 프로퍼티를 기반으로 RDF 데이터를 절러 개의 테이블로 분할 저장하는 기법을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2014.04a
• /
• pp.741-744
• /
• 2014

디비피디아 온톨로지는 위키피디아에서 구조화된 데이터를 추출한 지식 베이스이다. 이러한 지식 베이스의 자동 증강은 웹을 구조화하는 속도를 증가시키는데 큰기여를 할 수 있다. 본 연구에서는 한국어 디비피디아를 기반으로 새로운 트리플을 입력받아 기존의 지식 베이스를 자동 증강시키는 시스템을 소개한다. 스키마를 자동 증강하는 두 가지 알고리즘은 최하위 레벨인 인스턴스가 지닌 프로퍼티, 즉 rdf-triple 단위에서 진행되었다. 알고리즘을 사용한 결과 첫째, 확률적 격상 방법을 통해 단계별로 입력받는 인스턴스와 하위 클래스의 프로퍼티를 이용하여 상위 클래스의 스키마가 정교해졌다. 둘째, 이를 바탕으로 타입 분류가 되어 있지 않았던 인스턴스들이 가장 가까운 타입에 자동 분류되었다. 지식 베이스가 정교해지면서 재분류된 인스턴스와 새로운 트리플셋을 바탕으로 두 가지 알고리즘은 반복적으로 작동하며, 한국어 디비피디아 지식 베이스의 자동 증강을 이루었다.

• Conservation Science in Museum
• /
• v.14
• /
• pp.29-35
• /
• 2013

In cases, such as white porcelain with openwork lotus scroll design, where the ceramics has intricate form and decorations, we normally use casts to restore the work, in that current restoration materials have short molding time which causes difficulties in delicate work. However, since using a cast for restoration requires longer work-time and uses more materials, we decided to restore in direct. Since the molding time in the restoration material is closely related to the workability, restoration material which secures longer work hours is necessary when directly restoring a complex form of body. Therefore we experimented on the work-time, color variation and workability as time passes by making mixtures of Epoxy putty and Baked clay in different ratios. As a result of the experiment, the mixture ratio of OS8:RQ2 turned out to be the most effective ratio.

• Journal of KIISE:Databases
• /
• v.34 no.3
• /
• pp.206-216
• /
• 2007

With respect to the Semantic Web proposed to overcome the limitation of the Web, OWL has been recommended as the ontology language used to give a well-defined meaning to diverse data. OWL is the representative ontology language suggested by W3C. An efficient retrieval of OWL data requires a well-constructed storage schema. In this paper, we propose a storage schema construction technique which supports more efficient query processing. A retrieval technique corresponding to the proposed storage schema is also introduced. OWL data includes inheritance information of classes and properties. When OWL data is extracted, hierarchy information should be considered. For this reason, an additional XML document is created to preserve hierarchy information and stored in an XML database system. An existing numbering scheme is utilized to extract ancestor/descendent relationships, and order information of nodes is added as attribute values of elements in an XML document. Thus, it is possible to retrieve subclasses and subproperties fast and easily. The improved query performance from experiments shows the effectiveness of the proposed storage schema construction and retrieval method.

• Journal of Conservation Science
• /
• v.28 no.3
• /
• pp.277-283
• /
• 2012

This study conducted analysis of paint samples from a streetcar No. 381 (Registration Cultural Property No. 467) to identify the characteristics of the modern paint. The samples were analyzed by Microscopic observation, infrared spectroscopy and SEM-EDS. The upper part is consist of 26 layers and the under part is 29 layers. And the layers were painted various thickness from $10{\mu}m$ to $100{\mu}m$, and confirmed that several color had been used. The putty was used for surface treatment before painting. According to the results of infrared spectroscopy, paint specimens were identified as alkyd resin. Some bands such as C-H and C=O stretcing, aromatic, C-H bending, C-O stretching were found in spectra. Inorganic analysis showed that gold color on the surface was used copper-based paint. And type of the putty was lacquer-putty that was consist of kaolin, talc and zinc white.