• 디지털융복합연구
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• 제9권5호
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• pp.21-30
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• 2011

최근 스마트 TV 의 출현으로 인해 방송프로그램 콘텐츠 사장이 변화하고 있다. 이러한 상황에서 본 연구는 방송콘텐츠 산업의 전망과 정부의 정책방향을 제언하고자 하는 목적에서 수행되었다. 이를 위해 방송콘텐츠 제작 산업분야에 종사하는 전문가를 대상으로 심층면접을 실시하여 자료를 수집하였다. 자료분석 방법은 내용분석을 활용하였다. 연구결과 세 가지 방향의 정책제안을 제시하였다. 궁극적으로 본 연구는 방송프로그램 제작지원 사업의 활성화 정책을 제안하고자 하였다.

• 통상정보연구
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• 제8권1호
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• pp.259-281
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• 2006

In this study, I analysed the Direction of Progress for the Korean Export Insurance upon Export Support for Its Small-Middle Company, investigated Korean Export Insurance focussing on the Export Support for Its Small-Middle Company since Korea Export Insurance Coporation(KEIC)'s establishment and sought for the measures overcoming problems therewith. In my research I started from a basic model analyzing the Korean Export Insurance for Its Small-Middle Company using added several variables that have effect on such export relative price, world income and the amount of the Korean Export Insurance for Its Small-Middle Company. As a result, amount of the Korean Export Insurance for Its Small-Middle Company, world income and export relative price showed expected responses and were significant. Also world income showed expected responses but was not significant. In case of amount of the Korean Export Insurance for Its Small-Middle Company was statistical significance.

• 한국군사과학기술학회지
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• 제10권3호
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• pp.154-160
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• 2007

A direction finding system test-bed(DFSTB) at the electronic warfare communication-band is presented to efficiently evaluate and optimize the performance of the direction finding system through the indoor test setup. This test-bed gives a significant benefit to the designers of the direction finding system because it allows flexible test and design trade-off in the system design cycle. The system description and implementation of test-bed architecture, and the experiment results of direction finding accuracy according to modulation schemes are presented.

• 한국소음진동공학회논문집
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• 제23권3호
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• pp.218-225
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• 2013

Vertically-launched missiles are supported as erected vertically in the vertical launching system of warship, and they should be mounted in the same way when vibration-tested. However, mounting missiles vertically makes a fixture, which is a supporting structure, bulky and heavy so requiring a high-performance exciter. Mounting missiles as laid down horizontally in a vibration test is economical regarding fixture manufacturing and exciter performance, but it makes test results incorrect because the different mounting direction has effects on the test results. A bending moment due to missiles' weight happens to missiles, and resilient mounts, which support missiles in the vertical launch system, deflect differently from the real situation because of the static deflection of these mounts due to missiles' weight. If the resilient mounts supporting missiles have nonlinear force-deflection characteristics, vibration test results become more different from the true results. This paper proposes to support missiles with an additional resilient mount such as a bunge code in order to solve those problems coming from mounting vertically-launched missiles as laid down horizontally in vibration tests. The proposed approach enables to obtain the same test results as in their actual mounting condition even though vertically-launched missiles are mounted in a different direction.

• 천문학회지
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• 제43권3호
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• pp.55-64
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• 2010

We investigate how plasma structures in the solar chromosphere and corona can extend to altitudes much above hydrostatic scale heights from the solar surface even under the force of gravity. Using a simple modified form of equation of motion in the vertical direction, we argue that there are two extreme ways of non-hydrostatic support: dynamical support and magnetic support. If the vertical acceleration is downward and its magnitude is a significant fraction of gravitational acceleration, non-hydrostatic support is dynamical in nature. Otherwise non-hydrostatic support is static, and magnetic support by horizontal magnetic fields is the only other possibility. We describe what kind of observations are needed in the clarification of the nature of non-hydrostatic support. Observations available so far seem to indicate that spicules in the quiet regions and dynamic fibrils in active regions are dynamically supported whereas the general chromosphere as well as prorninences is magnetically supported. Moreover, it appears that magnetic support is required for plasma in some coronal loops as well. We suspect that the identification of a coronal loop with a simple magnetic flux tube might be wrong in this regard.

• 한국터널지하공간학회 논문집
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• 제10권3호
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• pp.245-256
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• 2008

터널 주지보재의 하나인 강지보재는 굴착 후 숏크리트 또는 록볼트의 지보기능이 발휘되기까지 터널 굴착면의 안정을 도모하는데 매우 중요한 역할을 수행한다. 일반적으로 수평터널의 강지보재는 중력방향으로 설치되고 있으며 시공성 및 안정성 측면에서 모두 유리한 것으로 알려져 있다. 그러나 경사터널의 경우는 터널 벽면에 작용하는 주응력 방향과 중력방향이 서로 다르기 때문에 최적의 강지보재 설치방향은 수평터널에서의 중력방향과는 다를 수 있다. 본 연구에서는 수치해석 방법을 이용하여 경사터널 벽면에 작용하는 힘의 작용방향을 규명하였으며 그 방향이 최적의 강지보재 설치방향이 될 수 있다. 즉, 강지보재의 지보효율은 터널 변위가 발생하는 방향으로 저항하도록 설치하는 경우에 최대가 될 수 있다. 국내 터널설계기준에서 제안하고 있는 경사터널에서의 세 가지 강지보재 설치방향을 모델로 설정하여 단계별 해석을 통한 비교검토를 수행하였다. 연구결과 경사터널 벽면에서의 변위 발생각은 막장경사와 관계없이 모두 터널 굴착면에 수직한 방향과 유사한 각도로 발생하므로 경사터널에서의 강지보재는 터널 굴착면에 수직인 방향으로 설치하는 경우가 지보효율 측면에서 보다 유리한 것으로 검토되었다.

• 한국세라믹학회지
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• 제48권6호
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• pp.648-653
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• 2011

Generally the piezo-composites have superior hydrostatic response characteristics than PZT ceramics due to both the stress amplification effect in axial direction and stress reduction effects in radial direction. This paper described material properties of a 1-3 type piezo-composite that fabricated with ceramic injection molding (CIM) technology. The electro-mechanical performances of the composite have been analyzed using FEM and the physical properties of the composite have been measured with the vol% of the PZT ceramics. Based on the results, the $k_t$ increased rapidly as the vol% of the PZT ceramics increased up to 30 vol% and saturated the constant value in the above region. Also the experimental results have good agreement with the simulation values of the composite. Finally we developed the composites having high piezoelectric properties than the PZT ceramics with the CIM technology.

• 가족자원경영과 정책
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• 제11권2호
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• pp.67-83
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• 2007

The purpose of this study was to evaluate the childcare support demonstration services and direct policy. The participants for the study were three childcare (IDOLBOMI), three parents who were provided with IDOLBOMI, two practitioners, and three professors related to IDOLBOMI. The data was collected by interview and a phone survey and analyzed qualitatively. The results and several suggestions were follows: First, IDOLBOMI loved to take care of children, felt proud of the job, and thought the work was worthy. The result can help future IDOLBOMI when they are recruited and trained; Second, IDOLBOMI wanted income security at least, which means that the basic activity fee for the IDOLBOMI should be compensated by government; Third, most of the parents who experienced the service were generally satisfied with that, but they wanted the quality of nutrition, hygiene and the quality of play to be developed for children. Therefore, the management of the center and maintenance of education are needed constantly for the IDOLBOMI system; Fourth, the parents who needed the service thought the cost of IDOLBOMI was expensive. Expenditure support should be sought for the parents; Finally, the group of professionals had difficulty in securing the quality of childcare support services. For the future, it is necessary to increase the educational budget, manpower resources, and PR budget for IDOLBOMI.

• International Journal of Contents
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• 제1권2호
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• pp.35-38
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• 2005

This paper describes a design of simple and precision direction finder that can be adapted to shipboard or mobile vehicles used for Electronic support measure, ELINT and radio signal monitoring systems. The direction finding technology has improved with monolithic integrated circuit, linear array antennas, and interferometer. Interferometer uses the phase-comparison principle and has a good direction finding accuracy but it has an ambiguity problem. We suggest a simple ambiguity solver using phase-comparison technology with amplitude-comparison principle. The direction finding device that has been designed by the suggested method has 0.7 degree RMS error in azimuth angle and 0.6 degree RMS error in elevation angle in 0.5 - 2.0 GHz.

• 한국잠사곤충학회지
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• 제37권2호
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• pp.197-205
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• 1995