• Proceedings of the Optical Society of Korea Conference
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• 2002.07a
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• pp.244-245
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• 2002

1 picosecond 보다 짧은 펄스길이를 갖는 초단파길이 레이저 펄스 (Ultrashort laser pulse, USLP)를 이용한 물질의 절제 (ablation)는 여타 nanosecond 영역의 레이저 절제와 많은 차이를 보인다(1). USLP는 순간 파워가 매우 높기 때문에 직접적으로 물질의 원자를 분리시켜 자유전자를 형성한다 이들 자유전자는 일반 선형흡수체 (linear absorbing chromophore)보다 흡수계수가 몇 십 배로 높아 대부분의 펄스 에너지가 표면 100-200 m 이내의 극히 작은 지역에 밀집되게 된다. (중략)

• Transactions of the Korean Society of Mechanical Engineers
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• v.9 no.3
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• pp.360-366
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• 1985

본 연구에서는 주구조물의 진동이 관심있는 주파수 범위내에서 1 자유도계로 근사화될 수 있는 경우, 임의로 선택된 점탄성재료에 대하여 최적튜닝 및 최적댐핑효 과를 얻을 수 있도록 그 형상을 설계하고, 예비변형율을 조절하는 절차를 제시하고, 제안된 방법론을 외팔보와 집중하중으로 구성되는 1 자유도계 및 선반의 공구대에 적 용하여 공진감쇠 및 채터억제효과를 살펴 보았다.

• Journal of Biosystems Engineering
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• v.21 no.2
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• pp.233-241
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• 1996

1) WTO 체제의 정착과 새로운 국제무역질서의 형성 1995년 1월 신 GATT체제라 할 수 있는 WTO가 정식 출범함으로써 새로운 국제무역질서의 기반을 구축하게 되었다. 즉, WTO의 출범으로 세계 경제는 하나의 교역규범 (WTO협정)과 하나의 국제기구 (WTO)를 갖게 되었으며, 이에 따라 지난 1980년대 이후 팽배해 온 세계무역의 신보호무역주의 경향은 다시금 자유무역주의로 복귀되었다. 이러한 WTO출범에 따른 세계자유무역의 확대는 기업의 해외직접투자를 증대시키고 세계경제의 안정성장에 크게 이바지할 것으로 기대된다. (중략)

• 전기의세계
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• v.36 no.5
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• pp.316-325
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• 1987

다각 보행 로보트의 세부 개발 분야로는 다음과 같이 세가지로 나눌 수 있다. (1) 기계적 구조 분야-3축 자유도를 갖는 다리의 구조, 에너지 효율을 고려한 다리의 구조, 역학 및 운동학의 분석, 모델화등 (2) 제어분야-다리의 시퀀스 결정, 각 다리의 서보 제어, 균형 및 안정도 유지, 속도제어 (3) 지능 및 센서 분야-장애물 인식, 경로의 판단, 장애물 통과시 다리의 위치 결정 본고에서는 제어분야와 관련하여 걸음새(gait)의 종류 및 표시방법에 대해서 2장에서 언급하고, 3장에서 1각 및 2각 제어 알고리즘을 통해 역학(dynamics)이 고려된 다리의 시퀀스 제어에 관해서 알아보며, 4각 이상의 다각 로보트에 대한 제어문제 및 제어기법에 대하여 4장에서 기술하였다.

• 대한공업교육학회지
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• v.42 no.1
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• pp.125-139
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• 2017

The purpose of this study was to provide a basic research data for increasing the satisfaction by analyzing perception of middle school beginning technology teachers 'technology home economics' class for free semester program. In order to investigate the class operation status, the survey questionnaires from 100 teachers were collected from middle school beginning teachers who teach technology home economics subject currently and analyzed by statistical program(SPSS ver.18). The main results of this study were as follows: First, there was no statistically significant difference to contents and satisfaction of lesson between teachers who experienced free semester program and not. In comparison of male teachers and female teachers, male teachers thought that free semester program was more helpful for student's 'career exploration' than female teachers, and there was statistically significant difference. Second, in the teacher's response according to have practice space and not, the satisfaction average of teachers who have practice space was higher(M=3.64) than those who have not at 'career exploration' and there was statistically significant difference satisfaction. Third, among the teachers who have experienced free semester program, male teachers were having more difficulty 'determining the assessment criteria' than the female teachers and there was statistically significant difference. Fourth, to improve the satisfaction of technical lesson, technology teachers asked to solve lack of practice material, increase of lesson-time, lack of practice space and lesson contents etc. Fifth, technology teachers asked free semester program seminars and information because free semester program lesson contents was given by internet and research groups of technology education.

• Journal of Korea Port Economic Association
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• v.25 no.1
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• pp.87-106
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• 2009

This paper is intended to suggest benchmarking ascension for the Gwangyang Port as a hub for international logistics. Most countries that seek to join. and lead, the global trading system as they work to develop production and logistics systems that establish a reputation for leadership in international logistics. Our focus in this research is on the Gwangyang Port and whether Gwangyang Port is capable of carving out a competitive niche as a hub of international logistics. Our analysis is based on comparison and analysis with benchmark port developments around the world. As proposals to promote and activate Gwangyang Port as a hub for international logistics, we recommended in this paper several benchmarks. First, Gwangyang Port FTZ must strengthen the incentive system for tenant companies and providing an inducement for new global companies. Second, Gwangyang Port needs to moderation of regulation on the investment tenant companies and strengthening one-stop service. Third, it is required to stabilize labor and management relationship and securing of flexibility of labor market. Lastly, Gwangyang Port must strengthen mutual interaction of Free Economic Zone (FEZ), Customs Free Zone(CFZ) and Free trade Zone(FTZ) in Korea.

• The Southeast Asian review
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• v.27 no.3
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• pp.1-47
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• 2017

This paper examines how democracy is being taught in secondary school level of Indonesian civic education. For this purpose, this study analyses the textbook contents concerning democracy. First, this study sets the freedom, the right, the unity and the stability as key words and analyzes the characteristic of describing democracy by looking at how each keyword is explained in the textbook. The result of analysis shows that democracy of Indonesia can be described as "Pancasila democracy" and textbooks have tendency to relatively emphasize 'the unity', and 'the stability' by differentiating themselves from "liberal democracy" and "liberalism." The freedom in textbook can be interpreted in the context of organic-statism that state and interests of state have the ascendancy over individuals. This viewpoint is based on the historical contexts of Indonesia. However, when textbook describes about Indonesian democracy and its values, they deal with contents of democratic principles, "the freedom of opposition", "the negative freedom", and natural rights. And the study interprets the existence of the two contrasting concepts - relative emphasis on the unity of state and the statement about the importance of individual rights and the freedom - in the textbook as a logical tension in transitional process of traditional organic-statism. Second, the study examines educational contents in accordance with the method of description in textbook. It has been found that there are logical tension and fallacy in describing the principle of fundamental concepts and applicate that concepts into Indonesia case. Also, when describing Marsinah and Munir case, there are some parts distorted and overlooked the facts. On the other hand, the gaps between the explanation in textbook and reality can be pointed out. This study which examined textbook and contents of the rights of the individual is an introductory study on textbook, education and democracy for development of Indonesia and their education.

• Journal of the Korean Society of Marine Environment & Safety
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• v.19 no.2
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• pp.213-218
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• 2013

This paper presents are experimental investigation to figure out slamming impact pressure and flow characteristics of a wedge type structure in free fall. The flow field has been obtained by 2-frame grey level cross correlation PIV(Particle Image Velocimetry) method, the impact presure of free fall structure by a pressure acquisition system apply to Dewetron system. The angles between a model and the free surface are adapted $15^{\circ}$, $25^{\circ}$, $35^{\circ}$ and $45^{\circ}$ respectively. Velocity field of water exit has higher better than water entry. The impact pressure under the bottom of the model ha been appeared higher values at 15 degrees than 45 degrees, and also at P1.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.18 no.3
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• pp.225-240
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• 2006

In order to calculate bending moments of rectangular plates with three edges clamped the other free subjected to both a uniform load and a triangular load, a finite difference equation for the non-dimensional governing equation are presented and numerical solutions with different aspect ratios and/or number of grid points are analyzed. The finite difference solutions are obtained by use of grid points up to 11,520 and the optimum grid points according to aspect ratios of the plate are presented as well. The obtained numerical solutions are shown to satisfy the given x moment boundary condition at the free edge, which can not be satisfied in Levy's analytical solutions and peculiar behaviour of the calculated moments is observed around the corners between the free edge and fixed ones. The numerical solutions of bending moments subjected to both a uniform load and a triangular load are compared with the corresponding analytical solutions which are shown in very good agreement on the solution domain except the neighborhood of the free edge.

• Journal of the Society of Naval Architects of Korea
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• v.39 no.1
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• pp.8-15
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• 2002

A two-dimensional higher order panel method using B-splines has been developed to overcome the disadvantages of the low order panel method and to obtain more accurate solution. The sources and the normal dipoles are distributed on both the body and the free surface. Instead of applying the upwind finite difference schemes to satisfy the linearized free surface and the radiation condition, the derivatives of the basis functions of the B-splines are directly applied to the linearized free surface condition. Numerical damping in the Dawson's method are avoided in the Present computations. In order to validate the present method, numerical computations are carried out for a submerged cylinder and a two-dimensional hydrofoil steadily moving beneath a free surface. The numerical results show that fast convergence and better accuracies have been achieved by the present method.