• Journal of the Korea Institute of Military Science and Technology
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• v.5 no.3
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• pp.45-55
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• 2002

중거리 유도무기 체계가 탄도탄과 같이 기동이 심한 표적과 교전할 때에는 지상 레이더는 표적 및 유도탄 위치정보를 보다 빈번하게 전송하여야 하지만, 자신의 임무를 수행해야 하므로 유도탄 및 교전 표적에 대한 정보를 필요이상으로 자주 전송할 수 없다. 이러한 상황에서 탐색기가 자체적으로 표적의 거리, 속도, 방향을 측정함으로서 지상레이더에 추가 부담을 지우지 않고 우수한 추적 정밀도로 교전성능을 향상할 시킬 수 있는 고반복 펄스열을 사용하는 PRF 변조방식을 제안한다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.784-786
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• 2003

본 논문에서는 유전자 발현 데이터를 분석하는데 있어서 자기 조직화 지도와 계층적 군집화 기법을 상호 보완적으로 사용하여 사용자가 보다 직관적으로 군집화 결과를 해석할 수 있는 방법을 제안한다. 제안된 방법을 사용하면 빠른 처리 속도로 대용량 데이터 처리에 적합한 자기 조직화 지도의 장점을 살릴 수 있으며 계층적 군집화의 장점인 가시화 기능을 이용하여 자기 조직화 지도의 단점인 군집 경계에 대한 불명확성을 해소하여 군집화 결과를 사용자가 쉽게 이해하고 직관적으로 해석할 수 있도록 도와준다. 본 논문에서 제안된 방법의 효용성을 검증하기 위해 세 종류의 데이터를 사용하여 실험을 수행한 결과 제안된 방법이 기존 방법에 비해 더 나은 성능을 보이는 것을 확인할 수 있었다.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.438-447
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• 2009

Korean local festival had grown rapidly quantitatively and qualitatively for past 10 year. And also problems of domestic local festival had been indicated much by specialists and researchers who plan festival. But most precedent researches are stopping in problem presentation that is based in one point of time. In the meantime, most the very best culture tourism festivals are meeting fixing step through trial and error in historic process more than 10 years. It is important to solve fundamental problem that understand process so much. This research analyzed festival contents change aspect on fixing process as local representative festival by time-series analys, Yeongsangang culture festival to example. By the result, the biggest problem is that unclearness of festival subject by wide festival theme establishment is connected by losing festival's identity.

• The Journal of Engineering Geology
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• v.15 no.3
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• pp.257-268
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• 2005

In situ rock mass is generally heterogeneous and discontinuous, with varying degrees of strength along the planes of weakness. The planes of weakness such as joints, faults, cracks and bedding planes, control the strength and deformation characteristics of the rock mass. Subsequently, the stability of underground opening depends upon the spatial distribution of discontinuities and their mechanical properties in relation with geometrical shape of openins as well as the mechanical properties of intact rock materials. Understanding the behaviour of a discontinuous rock mass remains a key issue for improving excavation design in hiかy stressed environments. Although recent advances in rock mechanics have provided guidelines for the design of underground opening in isotropic rock mass, prediction and control of deformation in discontinuous rock masses are still unclear. In this study, parametric study was performed to investigate the plastic zone size, stress distribution and deformation behavior around underground opening in a discontinuous rock mass using a continuum joint model. The solutions were obtained by an elasto-plastic finite difference analysis, employing the Mohr-Coulomb failure criteria. Non-associated flow rule and perfectly plastic material behavior are also assumed.

• Journal of The Korean Association For Science Education
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• v.39 no.3
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• pp.363-377
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• 2019

This study reveals the aspects of subjectivity in the test results in a science-specific aspect when assessing science-related affective characteristic through self-report items. The science-specific response was defined as the response that appear due to student's recognition of nature or characteristics of science when his or her concepts or perceptions about science were attempted to measure. We have searched for cases where science-specific responses especially interfere with the measurement objective or accurate self-reports. The results of the error due to the science-specific factors were derived from the quantitative data of 649 students in the 1st and 2nd grade of high school and the qualitative data of 44 students interviewed. The perspective of science and the characteristics of science that students internalize from everyday life and science learning experiences interact with the items that form the test tool. As a result, it was found that there were obstacles to accurate self-report in three aspects: characteristics of science, personal science experience, and science in tool. In terms of the characteristic of science in relation to the essential aspect of science, students respond to items regardless of the measuring constructs, because of their views and perceived characteristics of science based on subjective recognition. The personal science experience factor representing the learner side consists of student's science motivation, interaction with science experience, and perception of science and life. Finally, from the instrumental point of view, science in tool leads to terminological confusion due to the uncertainty of science concepts and results in a distance from accurate self-report eventually. Implications from the results of the study are as follows: review of inclusion of science-specific factors, precaution to clarify the concept of measurement, check of science specificity factors at the development stage, and efforts to cross the boundaries between everyday science and school science.