• 초등상담연구
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• 제7권1호
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• pp.67-90
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• 2008

The purpose of this study was to examine the effects of solution focused group counseling program on peer relationship and school life adaption of elementary school children. The subjects in this study were the 4th graders at S Elementary School in Ansan, Gyeonggi-do. 20 students were selected through the preliminary test of peer relationship and school life adaption, that is to say, each 10 students of experimental group and control group. A solution focused group counseling program was provided by researcher to the experimental group in six sessions once or twice a week, 60 minutes each. but control group was not conducted for any program. In verifying of the program effects in this study, KOREAN SPSS/WIN(version 12.0) is used for statistical analysis. The major findings of this study are as follows: First, solution focused group counseling program has a positive effect on all parts of sub-factors of peer relationship except to union life between friends. Second, solution focused group counseling program has a effect on the school life adaption of elementary and its all parts of sub-factors except to school rules. As noted above, it is proved that solution focused group counseling program has a positive effect to improve parts of sub-factors of peer relationship and school life adaption. Accordingly, it is necessary to feel satisfaction and Qualitative improvement in peer relationship and help school life adaptation of elementary school children through solution focused group counseling program.

• Journal of Ship and Ocean Technology
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• 제10권3호
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• pp.1-16
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• 2006

Despite the high cost of memory and CPU time required to resolve the boundary layer, a viscous unstructured grid solver has many advantages over a structured grid solver such as the convenience in automated grid generation and vortex capturing by solution adaption. In present study, an unstructured Cartesian grid solver is developed on the basis of the existing Euler solver, NASCART-GT. Instead of cut-cell approach, immersed boundary approach is applied with ghost cell boundary condition, which can be easily applied to a moving grid solver. The standard $k-{\varepsilon}$ model by Launder and Spalding is employed for the turbulence modeling, and a new wall function approach is devised for the unstructured Cartesian grid solver. Developed approach is validated and the efficiency of the developed boundary condition is tested in 2-D flow field around a flat plate, NACA0012 airfoil, and axisymmetric hemispheroid.

• 한국IT서비스학회지
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• 제12권4호
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• pp.449-459
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• 2013

The software which is used for electronic bulletin boards have shortcomings that the addition of new function and new information's type to the order point software is very difficult, and the aggressive adaption of newly introduced type of media is impossible because the software is developed by custom solution. Eventually new cost and time are required to enhance functionality or performance to software of DID(Digital Information Display). In this paper, we proposed the scheme to package DID's contents and to customize it using plug-in method. We conducted a case study of this scheme. The platform which can install Apps to DID as one of content was designed. Apps can be inserted by plug-in type on DID platform and run separately with DID framework. As a result, We got advantage that various contents, functions and Apps which are drived on Android can be displayed without any restriction and dependency because Apps itself is one of dynamic notice object. This solution increase reusability of Apps or contents, and can be used easily in various places such as airports, stations, terminals, and front desk by customizing.

• 융합보안논문지
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• 제3권3호
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• pp.35-42
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• 2003

정보화 사회로의 이전에 따라 사회전반의 기반구조 및 경제 사회 활동이 정보통신 인프라에 의존하게 되고 기반구조와 운영 소프트웨어들의 취약점으로 인한 인터넷의 보안 문제는 많은 심각한 문제점들을 드러내고 있다. 특히 해킹 기법과 바이러스들이 점차 자동화, 지능화, 대중화, 분산화, 대규모화, 은닉화 되어감에 따라 이들에 대한 효과적이 대처 방안이 요구되어지고 있는 실정이다. 이에 본 논문에서는 점차 지능화 되어가는 네트워크 상의 위협들에 관해 조사 분석하고 이를 바탕으로 MIB 기반의 보안관리 시스템 모델을 제안하고자 한다.

• 무역상무연구
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• 제58권
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• pp.329-351
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• 2013

Since the Kyoto Protocol was released in 2005, there has been a number of mechanisms about funding and how to allocate the burdens. The UNFCCC(United Nations Framework Convention on Climate Change)have discussed establishing an international fund to support the reduction of a greenhouse gas. As the availability of adaption finance for developing countries increase, it's needed for a way of prioritizing countries. This article analyzes the carbon reduction system that includes a emission trading scheme, a carbon tax and examines GCF(Green Climate Fund)'s role and needs. A solution to finance Green Climate Fund is more preferred a harmonized carbon tax that across all nations with carbon tax. Especially the role of industrialized countries is important that based on their historical responsibility for fossil fuel emission. That is, they should get more shares of the global costs than developing countries.

• Journal of Advanced Marine Engineering and Technology
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• 제31권4호
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• pp.417-424
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• 2007

This paper presents a solution that an analytical model for an induction motor and the formula of regenerative power and instantaneous torque are derived. based on the spiral vector. The torque is controlled linearly through variations of the slip angular velocity, based on the field acceleration method (FAM). And also PWM inverter fed induction motor drives is schemed to be easily a regenerative drive. The voltage source inverter fed induction motor drives that regenerative power occurs with back current type is presented, to easily controlled the feedback power and to proper the adaption of energy shaving drives. The experimental tests verify the performance of the FAM, proving that food behavior of the drive is achieved in the transient and steady state operating condition, and are discussed to save the power that regenerative power is measured at the operating acceleration or deceleration of servo system.

• 신재생에너지
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• 제10권3호
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• pp.14-21
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• 2014

As the world supply of fossil fuel sources decreases, the need for efficient energy consevation and develping green energy technologies becomes critical. Because of the high cost of the foundation for large turbines and optional high wind speed (over 12 m/s), it is very difficult to be located at inland city. For the solution above mentioned problem, we have been experimented about that not only using the adaption of wind power system on buildings for improving turbine efficiency, but also applying a wound rotor type induction generator for a small wind turbine.In this research, we try to find out the wind direction and wind speed those were measured every 1 min., during operation period, using the anemometers which consist of horizontally spinning cups on a vertical post. Performance testing for small wind turbine generating system was carried out by using the induction motor and invertor. Finally, we measured the power of 1 kW wind turbine system with the clamp meter and a voltmeter.

• 수산해양교육연구
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• 제22권3호
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• pp.402-419
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• 2010

The purposes of this study were to be free from the fixed instruction and help students have confidence in computer education and improve finding a solution voluntarily. The researcher designed the project instruction of UCC to enhance the community spirit through understanding the problems and solving those. The results of this study are as follows. First, learner changed their consideration in social education. They changed positively the thought about computer education: Form It is tedious and a memoriter subject.' to 'It's fun and good to do by ourselves. Second, students interested in UCC and doing it more actively. Especially, they enhanced the skill of using informations in both on and off-line and community spirit through helping each team members. This shows possibility and availability in not only social studying but also various adaption in other subjects. The researcher provides it would be better if this developed model should be practiced in school and examined the effectiveness in other aspects. lastly in other to examine its validity of enhancing problem-solving and effectiveness of interaction in community, the standard questionnaire and testing tools will be developed in the future.

• 한국유체기계학회 논문집
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• 제18권3호
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• pp.53-59
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• 2015

Tidal turbine, which is relatively similar to wind turbine in term of operational principle, has become a potential solution for the sustainable development of global energy. This paper introduces author's work on tidal turbine which aims to improve the power efficiency by the adaption of counter-rotating concept. The turbine system is modelled and analyzed using computational simulation commercial code. Compared with other works, the counter-rotating tidal turbine presented here is expected to operate stably with high performance throughout a wide range of tip-speed-ratio. Moreover, the equability of individual performance of each rotor is an advantage.

• 지능정보연구
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• 제17권3호
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• pp.43-61
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• 2011

본 연구는 사용자의 정적, 외부환경과 연관된 동적 상황정보와 사회적 관계와 연관된 개인적 상황정보들을 의사결정 요소로서 고려한 의사결정의 동적 변환(Dynamic Adaptation)을 제안한다. 즉, 의사결정자의 정적, 외재적 정보보다 과거의 경험, 주관적 선호도 및 사회적 관계와 연관된 상황정보(Social Context)를 의사결정에 동적으로 반영하고 동시에 의사결정 해의 사용시점에서의 가용성에 따라 유용 가능한 대안을 추출하는 방법론을 제안하고자 한다. 이를 위해, 정적, 외재적 및 사회적 상황정보를 이용하여 의사결정 추론한다. 추론은 의사결정자의 과거 경험에 기반한 사례기반 추론과 해당 의사결정 결과가 가용하지 않을 경우 수정을 위한 제약식 만족추론으로 이루어진다. 이를 위해 개인적 경험 등의 정보에 기반한 '문제상황 온톨로지'(Problem Context Ontology)와 집단의 경험적 지식에 기반한 '솔루션 온톨로지'(Solution Ontology)를 구축하였다. 의사결정단계는 상황정보 인식 및 문제상황 온톨로지에 매핑하는 단계, 경험적 사례로부터 문제상황에 가장 적합한 사례를 선택하는 단계, 생성된 솔루션이 가용하지 않을 경우 솔루션 온톨로지와 제약식 만족추론을 통해 새로운 대안을 생성하는 단계로 이루어진다. 본 방법론을 모임에 적합한 식당을 제안하는 예제를 적용함으로써 타당성을 검증하였다. 또한 실험을 통해 사회적 상황정보를 고려하여 생성된 의사결정대안이 그렇지 않은 경우보다 의사결정자의 만족도를 향상시켰으며, 생성된 의사결정대안이 가용하지 않은 경우 제약조건식과 솔루션 온톨로지를 이용해 생성한 대안이 유의미함을 검증하였다.