• Journal of the Earthquake Engineering Society of Korea
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• v.1 no.3
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• pp.1-10
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• 1997

It is recognized that the dynamic of a structure is affected by the characteristics of the soil layer and foundation. However the design codes for the seismic design of structures are partially reflecting the caharcteristics of the soil layers due to the inherent complexity of them and the lack of systematic study results for the foundation-soil system, and leading to unconservative or too conservative results. In this study, the kinematic interaction effects of foundation-soil system was investigated for the seismic analyses of structures estimating the effects of the shear wave velocity, the depth of the soil layer, the embedment of a foundation and pile foundation, and the modified classification criteria of soil layers are proposed for the reasonable seismic analyses of structures considering the characteristics of soil layers and foundations. For the embedded medium or large foundations (including pile foundations), at least 60m soil layer below the foundation should be considered for the seismic analyses of structures to tate into account the kinematic interaction effects of the foundation-soil system, and also the rocking motion of foundation-soil system with or without piles should be included in the seismic analyses of structures.

• Journal of the Korean Geotechnical Society
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• v.24 no.7
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• pp.51-60
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• 2008

In this paper, the behaviour of shell foundation was studied. In the theoretical program, the general shallow foundation theories and failure mechanism developed by Terzaghi, Mayerhof and others were reviewed and compared. In the numerical study, the 2 and 3 dimensional FEM simulations were carried out using an uncoupled-analysis approach. The results obtained from the model test show that the bearing capacity of shell foundation was about 25% to 30% larger than that of general foundation. Due to the cases of shell angle, the maximum bearing capacity of shell foundation shows when the shell angle of foundation was $60^{\circ}$. In addition, even if the shell foundation has various advantages compared with the general foundations as described above, the practical verifications in full scale size will be necessary to use in the field and will be helpful in the technical development of other special foundations.

• 대한공업교육학회지
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• v.35 no.2
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• pp.1-24
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• 2010

The purpose of this study is to investigate provedly the effectiveness of the practice for the arts and crafts by machine for project based learning upon improving industrial high school students' key competency for vocation, and to provide the incumbent teachers and future teachers who want to conduct research, a similar study with the basic reference materials. The vocational key competencies interested in this study are communication ability, information usage skills, team work skills, problem solving skills, tool usage skills, and responsibility and confidence areas. Because the result of pre and post testing over these six areas has insignificant differences statistically, we reach a conclusion which project based learning is more effective than traditional practice methods at improving the vocational key competencies of industrial students. On the basis of the results of this study, I would like to suggest some kinds of things needed to improve the vocational key competencies of industrial high school students. First, we require the diverse research to investigate the best teaching and learning methods to cultivate people of ability with the vocational key competencies Second, it is required that to measure the extent of the improvement of the vocational key competencies of industrial high school students, we have to develop a more objective test tool than that used in this study. Third, in the light of facts that project based learning influences on improving the vocational key competencies of the industrial high school student, we will have to make an effort actively to find the best teaching and learning methods, like project based learning. Therefore, we need to give diverse training opportunities and financial support so that teachers can conduct research to find the best teaching and learning method at improving the vocational key competencies for industrial high school students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.3
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• pp.567-575
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• 2018

This study examined a pile foundation using a spiral pile. To maintain the structural safely, a foundation for connecting the ground and the ground structure is needed. On the other hand, noise and vibration, etc. cause problems when constructing a foundation on adjacent structures or urban areas. A study of the spiral foundation of a new shape with low vibration and noise was carried out to solve these problems. A study of pile foundations was carried out on a scaled model test and compared with the results of Meyerhof's bearing capacity theory. The scaled model test results showed that the bearing capacity increases with increasing pitch angle and length of the spiral pile. To verify the measured bearing capacity in a test with theoretical results, the bearing capacity of the actual spiral pile and scaled model pile were examined and compared. The ultimate bearing capacity of the spiral pile can be increased by increasing the foundation length and pitch angle. This study complements existing foundation construction problems and contributes to a better effect and safety.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.24 no.2
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• pp.40-79
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• 1998

기초화장품의 연구 방향은 환경 요인과 심리적 요인의 다양화에 따라 단순 기능에서 고기능을 추구하며 기능의 세분화 방향으로 변화되고 있다. 피부 노화 현상에 대한 관심이 점점 높아짐에 따라 최근 유전자 레벨에서의 연구, 피부대사에 대한 연구 등의 활발하며 특히 피부 미백에 대한 관점은 서양에서 조차 관심의 대상이 되고 있다. 본 논문에서는 최근의 노화 방지제 개발을 중심으로 한 피부 노화 화장품, 분자 모델적 측면에서 본 피부 미백제 개발등과 최근 연구되는 계면활성제 Free 등의 화장품 제재를 중심으로 기초 화장품 영역의 향후 연구 발전 방향을 논의하고자 한다.

• Proceedings of the KSEEG Conference
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• 2005.04a
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• pp.354-357
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• 2005

• The Science & Technology
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• v.28 no.8 s.315
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• pp.10-11
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• 1995

기초과학 바탕없이 핵심기술 집중투자만으로 과학한국을 기대할수 있는가 기초과학수준을 높이기 위해선 장기안목의 투자, 교수2배증원, 연구기기는 연구인에게 지원, 우수한 대학원생 확보등 4대 현안을 최우선으로 해결해야 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.84-86
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• 2022

자율운항선박의 자율화 3단계에서는 육상에서 원격으로 선박의 운항을 제어하며 원격제어자에 의한 인적요소는 발생하게 된다. 인적요소를 식별하고 평가하기 위한 기초 연구로써 선박 운항 시 자세 특성에 따른 항해 위험 요소들을 분석하였다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.230-233
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• 2009

3D(Difficult, Dirty, Dangerous) 산업의 대표적인 산업으로 인식되는 건설업은 현재 노무기능인력의 고령화와 신규 기능인력 육성의 어려움이라는 문제에 당면하였으며, 이러한 3D 산업이라는 이미지의 탈피 및 노동집약적 사업구조에 대한 변화에 대한 대안으로써 타산업과의 융복합을 통한 이미지 쇄신 및 생산성 향상을 위해 자동화 및 정보화를 위한 노력을 경주하고 있다. 본 연구에서는 건설 자동화 및 정보화를 위한 알고리즘 개발 연구방법론에 대한 기초연구로써, 초고층 공사에서의 물류 효율화를 위한 장비간 통신방법에 대한 모델을 설정하고, 해당 모델에 대해 적용 가능한 알고리즘을 도출하는 프로세스를 규명함으로써, 건설 자동화 및 정보화 연구를 진행하는 단계에서 최적화(Optimization)를 위한 알고리즘 규명에 대한 방안을 제시하고자 한다.

• Proceedings of the Korean Society for Information Management Conference
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• 2010.08a
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• pp.67-72
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• 2010

원자료는 행하여진 연구결과를 도출하기까지 발생된 기초자료로써 다듬어지지 않은 자료를 의미한다. 이러한 원자료는 이미 행하여진 연구와 유사한 연구를 진행하는 후속연구자에게 있어 시간과 노력을 절약하는 것이 가능하게 해준다. 본 연구는 인문사회분야의 원자료 제공 서비스인 한국연구재단의 기초학문자료센터에 대한 문헌연구와 해외의 유사기관에 대하여 알아보고 지속가능한 서비스를 위한 방법인 오픈아카이브에 대하여 알아보고자 하였다. 향후 기초학문자료센터의 기 구축된 자료에 대하여 실제 사용자의 만족도를 조사하고 이를 통해 콘텐트의 보완 및 메타데이터 항목의 적절성과 질에 대한 실질적인 연구가 필요하다.