• Journal of Korean Society of Steel Construction
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• v.15 no.6 s.67
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• pp.629-637
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• 2003

This s paper presented the results of the three phases of fatigue tests to determine the fatigue strength of in-plane welded gusset joints, which are the most common details inevitably existing in the region of high stress range. A total of 57 fatigue specimens with varying thickness and strengths were made and tensile fatigue tests performed. One full-scale beam fatigue test was also performed. The validity of the fatigue strength of those details in the specification was confirmed, with the effects of thickness of flanges and welded attachments, length of attachments, and strength of applied steel examined. The characteristics of crack initiation and propagation were also observed. The test result was evaluated by comparing it with other test data and fatigue criteria of other countries. To determine the degree of stress concentration in the weld toe depending on geometric configuration such as attachment length and transition radius, analyses were performed. Compared to the present specification, analytical results indicate the need to revise and subdivide the detail categories.

• Annual Conference on Human and Language Technology
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• 2010.10a
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• pp.166-171
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• 2010

본 논문은 한국어 온라인 리뷰 문서의 오피니언 분류(Opinion Classification)에 있어 그 핵심 키워드가 형용사 (Adjective) 범주라는 점을 고려하여, 한국어 형용사를 <문맥에 의존하지 않는 절대 극성>과, <문맥에 의존하여 극성이 바뀌는 상대극성>으로 대분류한 뒤 그 각각의 의미 극성을 하위 분류하는 작업을 수행하였다. 기존의 연구에서 특징적인 오피니언 어휘 수십개에 의존하여 자동 분류를 시도하고자 하였던 문제점을 극복하기 위해서는 한국어 형용사 전체 범주에 대한 체계적인 극성 분류가 이루어져야 할 필요가 있으며, 여기서 특히 상세히 주목받지 못했던 상대 극성 어휘에 대한 본격적인 의미 분류가 요구된다. 본 연구에서 제시하는 형용사의 극성 분류는 기존의 이론 언어학적 형용사 의미 분류와 달리 온라인 오피니언 문서에서 도메인에 따라 나타나는 특징적 의미 유형을 결정하고, 이를 기준으로 온라인 오피니언 문서의 극성 판별에 효과적으로 적용할 수 있는 사전을 구축하였다는 점에서 의의를 가진다.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.95-95
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• 2021

전 세계 담수 자원의 예측 및 관리에 있어서 유출량 변화의 예측은 중요하다. 하지만 강수량 대비 유출량의 비율인 유출율이 수자원 시스템에 중요한 영향을 미치는지에 대한 여부는 여전히 불분명하다. 본 연구에서는 전 세계의 1,636개 관측소에서 관측된 유출량과 강수량 자료를 이용하여 최근 60년 (1956-2015) 동안 유출량, 강수량, 증발산량의 관계에 있어서 유출율의 역할에 관해 연구하였다. 수문 기후학적으로 습한 지역과 건조한 지역을 구분할 수 있는 임계값으로 유출율을 사용할 수 있다는 점을 Budyko 공간에서 적용하여 건조 지수와의 비교를 통해 발견할 수 있었다. 유출량 변화에 대한 상세한 분석을 위해 강수량 및 증발산량 변화율에 따라 6가지의 범주를 설정하였고 그 결과 대부분의 관측소에서는 강수량의 변화와 일관된 방향으로 유출량이 변화하는 것으로 밝혀져 유출량의 변화는 강수 변화에 더 민감하다는 결론을 얻었으며 모든 범주에 있어서 유출율은 강수량과 증발산량의 변화에 의한 유출량 변화의 크기에 상당한 영향이 있음이 밝혀졌다. 본 연구의 결과들을 통해 우리는 기후 변화에 따른 유출량 변화에 대한 예측성 향상에 있어서 유출율에 대한 물리적인 이해가 잠재적인 주요한 요소라고 제안한다. 토지 피복 및 토지 이용과 같은 인위적 영향은 유출율을 직접 감소 또는 증가시켜 유출량의 민감도를 변화시킬 수 있다. 본 연구에서 제안된 수치적인 접근 방식은 수자원 가용성에 대한 기후 변화 및 인위적 영향을 완화하기 위해 실행 가능한 정보를 제공할 것으로 보인다.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.871-874
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• 2008

In the beginning of KBC-2005, many structural engineers had have difficulty in designing the flat plate structures. Recently KBC-2005 has been revising. At this point, we need to study the lateral resisting systems which are based on KBC-2008 draft and applicable to the flat plate structure. When the RC structure system of KBC 2008 draft is compared with that of KBC-2005, there are some differences. (1) Structural system and height limitations according to seismic design category (2) Special Requirement such as special RC shear wall (3) New lateral force resisting system such as shear wall-frame interaction system The KBC-2008 will give structural engineers to choose the various lateral force resisting system

• Journal of Korean Society of Steel Construction
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• v.12 no.5 s.48
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• pp.463-473
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• 2000

This paper presents the results of the experimental and analytical investigation for the fatigue strength of welded details frequently used in steel bridges, especially for the details with relatively lower fatigue strength. The welded details included four kinds of welded details corresponding to the categories C, D, E and E' which represent the flange attachment details, web attachment details, transverse stiffeners and cover-plate details. Tensile fatigue tests were performed. The test results were compared with other available test results and the fatigue criteria of AASHTO, JSSC and Eurocode specifications. Generally, our test results were well agreed with other test results and satisfied with above-mentioned fatigue design provisions. However, it was found that transversely loaded weld-details showed lower fatigue strength than longitudinally loaded weld-details in transverse stiffener detail, and the test results of those details were not satisfied with AASHTO fatigue provisions. Examining the effect of length of gusset plate attachment details, welded details with longer attachment showed relatively lower fatigue strength, especially for the out-of-plane gusset plate details. It is recommended to perform additional fatigue tests with various loading and detail parameters and to establish the more detailed fatigue categories such as Eurocode or JSSC

• Journal of The Korean Association For Science Education
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• v.42 no.5
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• pp.543-555
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• 2022

This study aims to identify the trends in 'Aesthetic Science-Education' research through bibliographic analysis and provide future implications for research in this field. To this research, 100 studies were extracted using the search function of the Web of Science provided by Clarivate Analytics. Detailed bibliometrics was analyzed using the Bibliometrix package of the R program. As a result of the analysis, the average number of papers increased from 1993 to 2022, and academic journals in which related papers were published were evenly distributed locally. As a result of keyword analysis, papers with top citations, author collaboration networks, and literature co-citation networks, Aesthetic Science-Education could be classified as inducing aesthetic experience by integrating art in science education, and categories using 'formalist aesthetic' and 'emotional response'. The implications derived from this study are as follows: first, the aesthetic aspects of science should be actively studied to emphasize 'Agency' and 'Active Learning' in future science education. Second, it is necessary to develop a new approach to science education by further utilizing the 'formalist aesthetic' of science in science education. Third, the aesthetic aspect of science can change the perception of the Nature of Science of teachers, pre-service science teachers, and students. Fourth, it is necessary to discover implications for utilizing aesthetic aspects in science education through extensive research on the aesthetic aspects of science for teachers, students, and pre-service teachers. This study is meaningful because it provides an overview of the 'Aesthetic Science-Education' research to realize the above implications.

• Cross-Cultural Studies
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• v.41
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• pp.275-298
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• 2015

This paper is to examine in detail the relevant aspects of "Nature" and "Elegant Beauty" appearring in Cho, Chi-Hoon's poems and poetics. It uses the same context to explain the reasons and grounds for the inevitable, corresponding closely to his poetry and poetics. It is the core of Cho Chi-Hoon's poetry to determine "natural" new artistic views and his vision of ultra-modernism. This is consistent with the precise feature of "Elegant Beauty" in the midst of aesthetic categories profoundly discusseing his poetics. He regards a "lyric" as a vision of ultra-modernism, to overcome divisions and conflicts of values, "Truth Good Beauty", which was caused by modern science. Furthermore, it includes many social issues in accordance with the differentiation and specialization of each area. It is inferred to have been attempted to produce specifically was found to shape new images of "Nature" in the dimension of his poems, "Elegant Beauty" is overwhelmed with the aesthetic excellence of the other categories in the dimension of his poetics in this context.

• Journal of Korean Society of Archives and Records Management
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• v.9 no.2
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• pp.59-78
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• 2009

In this study, considering the importance of the providing archival information services over the Web in university archives, the evaluation model of the archival information services was proposed by identifying categories and contents of it. Direction for the improvement was proposed by evaluating and analyzing the Web archival information services of some university archives in Korea. Based on the evaluation, the following directions for improvement were suggested. First, the mission and vision of the archives should be established and published over the Web. Second, the introduction to the records catalogues and records collection should be provided in detail on the Web. Third, advanced search and full-text search functions should be provided, as well as the help information for the search methods. Fourth, university archives' Web sites should provide online exhibitions and newsletters of the archives.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.2
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• pp.240-250
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• 2020

This study explores the process of transitional career choice for North Korean defectors who are successfully living their lives after transition to a different system labor market. To achieve this study purpose, what is the process of transitional career choice for North Korean defectors due to the system transition? At present, he (Ed- who is he?) has a subjective sense of success in his professional life and conducted in depth interviews with three men and eight women as objects that can explain the process of experience in rich and detailed ways. To this end, the author interviewed three men and eight women who are satisfied with their current job and analyzed them with the grounded theory method proposed by Strauss & Corbin (1998). As a result, the paradigm model was derived from the central phenomenon of 'conversion of perspective', and the core category was 'conversion of perspective and challenge new career'. The transitional career choice process was derived into four stages according to the flow of time and interaction as 'reality recognition stage', 'active change recognition stage', 'support and coping strategy stage', and 'growth stage' and positive reflections from transitional learning and potential factors of planned chance skills were found.

• Journal of the Korea Concrete Institute
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• v.25 no.3
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• pp.271-281
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• 2013

The current seismic design code prescribes that a structural wall should be designed as a special shear wall when the building height is more than 60 m and its seismic design category is classified as D. However, the use of a special shear wall has a negative effect on constructability and economic efficiency. In the present study, the seismic performance of a special shear wall and a special shear wall with relaxed reinforcement detail was evaluated through a cyclic reversal loading test. The specimens were constructed to measure the results of the experimental variable regarding the reinforcement details of the special boundary element. Next, the seismic performances of a special shear wall structural system and that of a special shear wall structural system with relaxed reinforcement detail was evaluated by methods proposed in the FEMA P695. The cyclic reversal loading test results of this study showed that the performance of the shear wall with relaxed reinforcement detail was almost similar to the performance of a special shear wall and has the performance which requested from standard. The results of the seismic evaluation showed that all special shear walls with relaxed reinforcement detail are satisfied with the design code and seismic performance.