• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.201-206
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• 2015

이 논문에서는 역학적 지식파 EDISON 구조동역학 서버에서 지원하는 이공계 교육 및 연구용 시뮬레이션 프로그램 중 Co-rotational Plane Beam with Arbitrary Section을 이용하여 캔틸레버 보의 처짐을 기하 비선형적으로 해석한다. 또한 해석에 사용된 프로그램이 실제 교육에 적용이 가능한 지를 고찰함에 그 목적이 있다. 처짐을 해석하기 위하여 수계산, 프로그램을 이용하여 얻은 결과값을 비교하였고 캔틸레버 보의 변화 형상을 시각화 하였다.

• Journal of Scientific & Technological Knowledge Infrastructure
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• s.5
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• pp.41-50
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• 2001

화학구조 D B는 그 목적에 다양하게 분류될 수 있는데, 유사한 약효를 검색하기 위한 유사도 검색(similarity search) DB와 유기합성을 위한 reaction DB, 실험이나 계산으로 얻은 물성을 모은 property DB, 생물학적 검증 데이터를 모은 activity DB등이 있다. 이러한 화학 D B는 신약을 설계하는 입장에서 볼 때, 앞에서 말한 다양한 D B로서의 목적을 모두 충족시킬 수 있는 유기적인 설계가 바람직하다.

• Review of KIISC
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• v.34 no.1
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• pp.53-59
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• 2024

블록체인 기술의 발전과 중앙집중형 금융서비스의 취약성과 불신에 대한 우려가 커지면서 탈중앙화 금융(DeFi)과 탈중앙화 거래소(DEX)가 유망한 대안으로 떠올랐다. 본 논문에서는 특히 Uniswap에 초점을 맞춰 DeFi 내의 과제와 문제를 살펴본다. 우리는 DeFi 및 DEX의 현재 상태에 대한 배경 지식을 제공하여 MEV(Maximal Extractable Value) 공격에 대한 취약성을 강조한다. 우리의 접근 방식에는 MEV 공격 패턴을 식별하고 분석하기 위한 Uniswap에 구조 분석이 포함된다. 이 연구는 DEX 보안을 강화하고 MEV 위험을 완화하기 위한 귀중한 지침을 제공하여 DeFi 생태계의 이해관계자에게 필수적인 리소스 역할을 한다.

• Journal of the Korean earth science society
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• v.43 no.1
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• pp.199-209
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• 2022

In this study, we analyzed the preparedness of Korean citizens for earthquake hazards. For this purpose, we developed a questionnaire on the preparedness of citizens for earthquake hazards, consisting of three constructs (knowledge, awareness, and management). A total of 1,256 citizen responses were collected through probability proportionate-to-size sampling and then subjected to Rasch analysis, inferential statistical analysis, and cluster analysis. The findings are as follows. First, questionnaire analysis showed that overall, the earthquake preparedness of citizens was 'normal', with a lower management score than knowledge and awareness scores. Second, analysis of variables related to preparedness for earthquake hazards, gender, education level, actual distance, and safety awareness were found to influence preparedness for earthquake hazards. Third, correlation analysis revealed a high correlation between the three constructs of preparedness for earthquake hazards, namely knowledge, awareness, and management, indicating a structurally close relationship with each other. In addition, even if gender and education level differed, these structural correlations were similar. Through cluster analysis, the citizens were further divided into five groups; the group with moderate levels of the three constructs accounted for the majority of citizens. Considering these findings, we propose an educational orientation that fosters the preparedness of citizens for earthquake hazards.

• Journal of KIISE:Software and Applications
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• v.29 no.1_2
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• pp.42-52
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• 2002

Information extraction(IE) is a process of recognizing and fetching particular information fragments from a document. In previous work, most IE systems generate the extraction rules called the wrappers manually, and although this manual wrapper generation may achieve more correct extraction, it reveals some problems in flexibility, extensibility, and efficiency. Some other researches that employ automatic ways of generating wrappers are also experiencing difficulties in acquiring and representing useful domain knowledge and in coping with the structural heterogeneity among different information sources, and as a result, the real-world information sources with complex document structures could not be correctly analyzed. In order to resolve these problems, this paper presents an agent-based information extraction system named XTROS that exploits the domain knowledge to learn from documents in a semi-structured information source. This system generates a wrapper for each information source automatically and performs information extraction and information integration by applying this wrapper to the corresponding source. In XTROS, both the domain knowledge and the wrapper are represented as XML-type documents. The wrapper generation algorithm first recognizes the meaning of each logical line of a sample document by using the domain knowledge, and then finds the most frequent pattern from the sequence of semantic representations of the logical lines. Eventually, the location and the structure of this pattern represented by an XML document becomes the wrapper. By testing XTROS on several real-estate information sites, we claim that it creates the correct wrappers for most Web sources and consequently facilitates effective information extraction and integration for heterogeneous and complex information sources.

• Journal of The Korean Association For Science Education
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• v.33 no.5
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• pp.1041-1054
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• 2013

Big ideas are overarching principles that help students to build a holistic understanding of domain-specific knowledge and assimilate individual facts and theories. This study aims to design a standard-based integrated science curriculum framework based on Big Ideas. The core contents were extracted by analysing the 2009 National Science Standards curriculum of primary and middle schools. Four Big Ideas, 'diversity,' 'structure,' 'interaction,' and 'change,' were generated after the process of examination and categorization of core contents. The scientific facts, disciplinary concepts, and interdisciplinary concepts of every scientific domains included in each Big Idea are represented as a knowledge pyramid. Essential questions guiding the direction of curriculum design were proposed on each Big idea. Based on the framework, teaching modules for 'structure' were developed for grades 5~6.

• Journal of the Korean Society for information Management
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• v.6 no.2
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• pp.87-103
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• 1989

In this study, A DDC online system was developed which provides subject access and browsing function for class numbers or subject terms. A knowledgebase of the DDC Schedules and Relative Index was designed for this purpose using IBM-PC. From the DDC 20th edition, subjects from 004 to 006, covering‘data processing’,‘computer science’‘programming and progrms’, and etc., were selected for this experiment. DDC schedules are represented as a frame structure which is apt to describe hierachical structures. This experiment, joining the DDC to the information retrieval environment of an online catalog, will contribute to the future of the online DDC system by providing possiblities for search strategies not feasible through the alphabetical approach of subject headings and keywords presently supported by online catalogs.

• Journal of The Korean Association For Science Education
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• v.24 no.5
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• pp.987-995
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• 2004

The purpose of this study was to analyze characteristics of problem solving process with proportional or compensational reasoning of the elementary school students. For this study, 85th grade students were selected and tested with Science Reasoning Task, information processing ability test and proportional and compensational reasoning tasks. This study revealed that students in mid concrete stage could solve the proportionality task and easy compensation task. But, most of the students could not solve difficult compensation task. And as the students got higher score in information processing test, it took them less time to solve the problem. The types of strategy used in solving proportional and compensational problem were categorized as the factor of change, building-up and the cross-product. Most of the students failed in problem solving used incorrect schema knowledge, procedure knowledge and strategy knowledge. Many students tended to use proportionality strategy to solve the difficult compensation task. Result of this study suggested that various task included different structure and the same schema knowledge can be effective for the advancement of students' proportional and compensational reasoning ability.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.439-455
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• 2017

최근 과학기술의 사회적 역할이 강조되며, 고령화 대응 과학기술에 대한 관심도 증대하고 있다. 특히, 고령화 관련 연구를 수행해온 기존의 과학기술영역은 현대 노인들의 요구를 충족시켜주기에 한계가 있는 등 새로운 과학기술의 발전방향성을 제시하기 위한 연구의 필요성이 증대하고 있다. 하지만 우리나라의 경우 고령화 대응 R&D를 총괄할 컨트롤 주체가 부재하며, 아직까지 관련 연구가 일부 영역에 편중되어 있다. 이에 본 연구는 WoS에서 제공하는 서지정보를 이용하여 키워드 네트워크분석을 수행함으로써, 고령화 대응 과학기술 분야의 지식구조를 국가별, 기간별 비교분석하였다. 분석결과, 최근 10년간의 연구동향이 직전 10년간의 연구동향과 비교하였을 때, 과학기술의 사회적 역할을 강조하고 있는 것으로 나타났다. 또한, 일본과 독일, 그리고 우리나라 연구동향을 비교분석한 결과, 우리나라의 경우 노인의 사회적 지위 및 삶의 질 등, 그리고 과학기술의 사회적 역할에 대한 연구가 상대적으로 늦게 나타났다. 위 분석결과를 토대로 향후 우리나라의 고령화 대응 과학기술 R&D 추진 방향에 대한 시사점을 제시하였다

• Journal of Korean Elementary Science Education
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• v.21 no.1
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• pp.13-24
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• 2002

This study examined the knowledge structure constructed by children before formal instruction, and successive changes in the structural complexity of knowledge during the learning of the 'Structure and Function of Plants' unit. The researchers let the 5th graders draw the first draft of their concept maps in order to examine the pre-existing knowledge structure concerned with the unit and also four concept maps after completing every fourth lesson. Each concept map drawn by children on the basis of the previous one showed the degree of their current understanding on the structure and function of plants. The results revealed that only two levels of hierarchy and five relationships among the components of the first concept map(relationship, hierarchy, cross link and example) were proven to be valid in terms of conceptual relevance. According to the standard map, there was no change in hierarchy from the 2nd to the 3rd map, and in example from the 2nd to the 4th map. However, the gradual and successive increases of the scores in all components appeared in the children's maps throughout the unit. Knowledge restructuring occurred strongly in the early periods from the 1st to the 6th lesson, and the significant stable changes in tuning and accretion appeared throughout the whole lessons. The results also showed that there were no significant gender differences on the 5th grader's knowledge structuring.