• Land and Housing Review
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• v.5 no.1
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• pp.35-40
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• 2014

Site coefficient and amplification factor of current domestic Seismic Design Code (KBC-2009) have no consideration for the domestic ground condition in which the base rock is normally placed within 30m form the surface. Accordingly, in this study dynamic centrifugal test and analysis for pile foundation into sand and upper structure were achieved. and the response spectrums of free surface and basement were compared with each other. Within the period 1 sec., the measured spectral acceleration of free surface and basement was bigger than the design spectral acceleration of SC and SD site. However the measured spectral acceleration of free surface and basement for the period over 1.5 sec. was smaller than the design spectral acceleration of SC site. There was no severe difference of spectral acceleration according to the upper structure, embedded depth of foundation and free surface conditions. Consequently, normal domestic apartment housing for the period range over 1.5sec. could be design more economically applying these test result.

• Journal of Korean Physical Therapy Science
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• v.9 no.3
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• pp.7-17
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• 2002

편마비 환자의 인지 기능과 운동 및 신체적 기능에 관련된 변인을 분석하고자 하였다. 본 연구는 인지 기능이 편마비 환자에게 미치는 영향과 인지 영역의 손상이 편마비 환자의 독립적 기능 및 수준 향상의 예언 인자로서의 고려해야 할 개념을 검사나 평가 척도로 비교, 분석 하였다. 연구 대상은 전라북도에 소재한 한방병원에 입원 및 통원하고 있는 52-73세의 연령 범위에 있는 편마비환자 20명 이다. 편마비 환자의 기능적 능력, 운동 회복, 신체적 기능 그리고 인지적 상태를 평가하기 위해 편마비 환자를 위한 임상적 결과 변인 척도, 운동 평가 척도와 바델 척도 그리고 기능적 독립성 측정 척도를 평가도구로 사용하였다. 편마비 환자의 신체적, 운동 그리고 기능적 능력 상태를 평가도구에 의해 측정된 결과를 분석한 바 운동, 신체적 그리고 인지적인 영역과 기능적 독립 측정 척도 및 바델 척도와 관련성이 있음을 보여주고 있다. 편마비 환자의 신체적, 인지적 결함이나 손상 부위, 손상의 본질에 따른 대상의 선정과 운동 조절 형태에 관한 지식 그리고 인지와 신경학적 결함 정도를 심도있게 다루어 기능적 능력 향상의 임상적 효과를 높이고자 하는데 연구의 의의가 있다.

• Journal of The Korean Association For Science Education
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• v.19 no.2
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• pp.204-216
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• 1999

A value can be placed on the integrated science curriculum in terms of producing an insight into solving the routine problem. From such a point of view, the comprehensive concepts which explain the extensive natural phenomena were defined as the integrated themes in this study, and the contents of the integrated science curriculum were developed, as the understanding of the contents focused on the integrated theme enables us to be productive and have an insight. Through analyzing teaching materials, programs and curriculums in relation to the integrated science, five concepts of system, interaction, harmony and balance, structure and function, and circulation were established as the integrated themes, and the nature of each integrated theme was examined. Next, in accordance with the integrated theme, the content of the integrated science curriculum,which are deeper in aspect of the integration level than that of the current science of middle school, were developed. The content of the integrated science curriculum which was proposed in this study is of great significance. in that they provide new perspectives related to our current science curriculum.

• Geophysics and Geophysical Exploration
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• v.18 no.4
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• pp.216-222
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• 2015

Airborne transient electromagnetic (ATEM) surveying was introduced several decades ago in the mining industry to detect shallow conductive targets. However, conventional ATEM systems have limited depth of investigation because of weak signal strength. Recently, the grounded electrical source airborne transient electromagnetic (GREATEM) system was proposed to increase the depth of investigation. The GREATEM is a semi-airborne transient electromagnetic system because a long grounded wire is used as the transmitter. Traditionally, ATEM sounding data have been interpreted with 1D earth models to save the computing time because modern ATEM systems generally collect large data sets. However, the GREATEM 1D modeling requires numerical integration along the wire, so it takes much more time than the 1D modeling of conventional ATEM. In this study, the adaptive Born forward mapping (ABFM) was applied to the ATEM 1D modeling because the ABFM is incommensurably faster than the ordinary GREATEM 1D modeling. Comparing the results from ordinary and ABFM 1D modeling, it was confirmed that the ABFM can be applied to the 1D modeling of GEATEM.

• Journal of Korean Tunnelling and Underground Space Association
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• v.11 no.1
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• pp.85-95
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• 2009

In urban areas, blast excavation adjacent to tunnels is carried out frequently. It is generally required to secure static and dynamic stability of nearby tunnel structures for any such activities. Although there is some national guidelines for static safety, there is little guides to risk zoning controling the dynamic behavior of the underground structures. In this study, impacts on the blast-induced vibration are investigated using numerical study. An attempt to define the restricted area of blast adjacent to subway tunnels was also made. Particular concerns were given to tunnel depth and ground types. By carrying out the parametric study on depth and ground patterns, the envelope of blast distance of which dynamic response on the lining is controlled under 1 cm/sec, is established. It is shown that the increase in depth has increased the required safety distance slightly until the distance of 3.5 times of the tunnel diameter. Despite small changes in safety distance, it can be generally said that the effects of depth and stiffness of the ground is not significant in controlling the particle velocity of the tunnel linings.

• Journal of Digital Convergence
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• v.10 no.9
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• pp.213-224
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• 2012

Supply chain management for complex project focuses on planning acquisitions, identifying and choosing the right suppliers and subcontractors, planning and negotiating appropriate contracts, and administering and closing contracts. Working with suppliers and subcontractors requires continuous integration activities during project execution. This article examines the concept and issues concerning supply chain management in plant engineering Project, of which has not been taken seriously by industry. We propose the technological infra, social infra and information system connecting all participants in supply chain, as the major fields of research requiring industry attentions, and give a brief summary of research in each proposed areas.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.5
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• pp.17-17
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• 2001

고유전 (Ba, Sr)TiO₃ (BST) 박막을 이용한 DRAM storage capacitor의 저전계 영역에서의 전하손실을 발생시키는 커패시터의 누설전류는 유전완화전류와 진성 누설전류로 이루진다고 알려져 있다. 특히, 기가급 DRAM의 동작 전압(~IV)에서 유전완화전류가 진성 누설전류에 비해 훨씬 크기 때문에 이에 대한 심도 있는 연구가 필요하다. 본 연구에서는 thermally stimulated current (TSC) 측정법을 BST 박막에 처음으로 적용하여 트랩의 에너지 level 및 공정변화에 따른 트랩 밀도의 상대적 평가를 하였다. 그리고, 기존에 사용되던 전류-전압(I-V) 측정이나 전류-시간(I-t) 측정과 비교 및 분석함으로써 유전완화 전류의 원인을 규명하고 TSC 측정법의 신뢰성을 살펴보았다. 먼저 안정적인 TSC 측정을 위해 전계, 시간, 온도 및 승온속도에 따른 polarization condition을 알아보았다 이 조건을 이용한 TSC 측정으로부터 BST 박막에서의 트랩의 energy level이 0.20(±0.01) eV와 0.45(±0.02) eV임을 알 수 있었다. Rapid thermal annealing (RTA)을 이용한 후속 열처리에 따른 TSC 측정을 통하여 이 트랩들이 산소결핍(oxygen vacancy)에 기인함을 확인할 수 있었다. MIM BST 커패시터의 열처리에 대한 TSC 특성은 전류-전압(I-V) 및 전류-시간(I-t) 특성과 같은 경향성을 보인다. 이것은 TSC 측정이 BST 박막내의 트랩을 평가하는데 있어서 매우 효과적인 방법이라는 것을 보여준다.

• Journal of the Korean School Mathematics Society
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• v.13 no.1
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• pp.105-124
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• 2010

The purposes of this study were to explore in depth about 5th graders' mathematical speaking and writing abilities and to investigate differences on those abilities. The study involved three-5th graders and their speaking and writing abilities in geometry area were analyzed. According to the results of the study. the children had difficulties in selecting and using appropriate mathematical languages to explain mathematical concepts, mathematical ideas, and problem solving steps. The children who participated in the study showed higher ability in speaking than writing.

• Archives of design research
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• v.16 no.4
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• pp.79-90
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• 2003

As cultural goods have been taken notice of as an area that may contribute to the creation of national profits, there have been attempts to construct infrastructure for the area. Contrary to the trend, however, design education has not performed in-depth researches and studies on the professionalism and characteristic of subjects. Resultantly it has hardly prepared systematic educational curricula and contents. In this situation the present study purposes to set the right direction of design education and to draw the outline of systematic educational contents for cultural goods design. For this purpose, it defines the scope of cultural goods design based on the concept and contents of cultural goods design, examines the functions, the roles and the conditions of cultural goods designers, and based on them, propose the direction of cultural goods design education as the ground of detailed methods of teaching cultural goods design.

• Journal of Korean Society of societal Security
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• v.2 no.3
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• pp.39-46
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• 2009

A small loop-loop multi-frequency electromagnetic(EM) induction method is a useful technique to map a resistivity distribution efficiently and non-destructively. However, for quantitative interpretation and depth sounding, the quality of measured data is crucial. In this paper, we propose a bias correction of measured data by using background noise measurements to obtain reliable data, and propose an evaluation technique of apparent that can provide a resistivity image easily. We have performed small loop-loop EM measurements to detect water saturation in a man-made test site. The application of our proposed techniques to the measured data was successful.