• 영어어문교육
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• 제17권4호
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• pp.293-312
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• 2011

Many immersion programs have been established and managed throughout Korea in recent years in schools, English villages and camps. Research on the effects of various programs has been reported with focus on the program types or the benefits and learning outcomes for the participants. The purpose of this study is to find out the effects of participation at English camp as a teaching assistant by comparing some factors such as competence, English abilities, and connection to current studies/career before and after camp experience. The results show that all 17 competence rates rose with 'crisis management' showing prominent change. Also, the camp experience provides opportunity for improving English Test scores, conversational skills, teaching skills, and mostly language confidence. Lastly, the camp helped in setting career goals and was helpful in the preparation process of job seeking. Most of the subjects, the teaching assistants at camp, replied that the impact of camp experience is useful in current studies/career. In conclusion, the experience as camp teaching assistant is valuable in many aspects.

• 한국구조물진단유지관리공학회 논문집
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• 제2권2호
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• pp.202-208
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• 1998

To investigae the effect of anchorage type of carbon fiber sheet (CFS) on flexural behavior of RC beams, the loading test of RC beams reinforced with CFS was conducted in variable of anchorage Type such as bolting anchorage and U type anchorage using CFS. This study can be summarized as follows ; It is confirmed experimentally that the bolting anchorage and U type anchorage with CFS is very effective to delay the bond failure and prevent the peeling of CFS. Also, the anchorage type applied with this study is very effective to improve the ductility compared with the improving of maximum flexural strength of RC beams. It is believed that the anchorage type used this study must secure the ductile capacity of above 3 for the flexural strengthening of RC beams. In the future, it is required to obtain the data about anchorage type of CFS for utilization of field work as well as investigate the ductile capacity of conventional study of anchorage type

• 한국구조물진단유지관리공학회 논문집
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• 제2권2호
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• pp.195-201
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• 1998

The purpose of this study is to evaluate the flexural strengthening effects of RC beams reinforced with carbon fiber sheets (CFS) in variable of strengthening amount and anchorage length of CFS. This study can be summarized as follows ; The CFS shares the tensile stress such as rebar during loading test. Also, as the strengthening amount of CFS is increased, the maximum flexural strength of RC beams reinforced with CFS is increased. Therefore, it is confirmed that the CFS's strengthening method is very effective to improve the flexural strength of RC beams. The maximum flexural strength of RC beams with CFS is determined by bond failure between CFS and concrete surface. So, the evaluation of CFS's strengthening effect can be calculated using the tensile stress of CFS which is peeling. When the anchorage length of CFS is increased, the ductility of RC beams is increased because of delaying the peeling of CFS. But, in case of same anchorage length of CFS, when the strengthening amount of CFS is increased, the ductility is decreased. Therefore, it is considered that the anchorage of CFS in the end zone is necessary.

• 한국인터넷방송통신학회논문지
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• 제22권3호
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• pp.31-36
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• 2022

최근 드론은 다양한 분야에서 활용되고 있고 드론의 기술도 또한 발전하고 있다. 이에 따라 드론에 대한 위험이 증가하고 있으며, 이로 인한 위협을 줄이기 위하여 드론을 탐지하는 기술이 중요해지고 있다. 하지만 드론은 크기가 작고 반사도가 낮은 재질로 되어 있어 탐지가 어렵다. 본 논문에서는 소형/경량화한 펄스 도플러 레이다에 탑재되는 신호처리 구조를 설계하였다. 대용량 데이터를 실시간으로 처리하기 위하여 채널 별 병렬처리를 수행하고 각 단계에서 연산시간 단축을 위한 알고리즘을 적용하였다. 위상배열안테나와 통합하여 야외시험을 통해 드론 탐지 성능을 확인하였으며, 이로 인하여 본 구조 설계가 실시간으로 동작함을 알 수 있었다.

• 한국군사과학기술학회지
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• 제27권2호
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• pp.189-196
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• 2024

Classification of drones and birds is challenging due to diverse flight patterns and limited data availability. Previous research has focused on identifying the flight patterns of unmanned aerial vehicles by emphasizing dynamic features such as speed and heading. However, this approach tends to neglect crucial spatial information, making accurate discrimination of unmanned aerial vehicle characteristics challenging. Furthermore, training methods for situations with imbalanced data among classes have not been proposed by traditional machine learning techniques. In this paper, we propose a data processing method that preserves angle information while maintaining positional details, enabling the deep learning model to better comprehend positional information of drones. Additionally, we introduce a training technique to address the issue of data imbalance.

• 대한예방의학회:학술대회논문집
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• 대한예방의학회 2001년도 제53차 추계 학술대회 연제집
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• pp.302-304
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• 2001

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.221-222
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• 2012

This study is to high early concrete development which reveals 14 MPa within 12 hours in order to reduce the mold time of dismantlement and not do the steam curing of the precast concrete product. About (40~50) min could shorten the final setting time if the coagulation test result cement amount 100 kg/m3 was increased. In the case of the compressive strength, it was exposed to be satisfied the target value with the cement amount 500 kg/m3 combination according to the hardening accelerator addition.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 하계학술대회 논문집
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• pp.426-431
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• 1991

Diakoptic method applied to analyze large power system, always require the efficient tearing algorithm. But conventional tearing methods is not suitable to apply practical power system. This paper presents new tearing algorithm based on factorization path concept of sparse vector method, and applied MPRLD, a kind of optimal ordering algorithm, in ordering step to improve the efficiency of tearing algorithm. Test result of model systems shows that new proposed method in this paper is enable to tear power systems not to be teared by heuristic cluster method, reduces computing time and memory size.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.706_707
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• 2009

This paper presents the torque calculation method of a permanent magnet spherical motor. To calculate the torque of the spherical motor by using finite element method (FEM), 3-dimensional FEM must be used. However since it spends too much time and memory in using 3-D FEM, the easier torque calculation method was presented. In this method, it is very important to get the approximation function of the torque profile curve; the authors present the approximation method of the torque profile curve. This paper shows the torque calculation result coming closer to the torque by 3-D FEM.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 A
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• pp.322-324
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• 2000

This paper introduces the concepts of UML(Unified Modeling Language) and the applying this technique for implementing voltage stability analysis program. Conventional function-oriented software development methodologies are inadequate to support further maintenance and enhancement. To overcome drawbacks of these methodologies, this paper proposes applying object-oriented technology for voltage stability evaluation software development. In this paper, a modal analysis approach, a steady-state voltage stability evaluation method, is used and UML is applied to the analysis and design for software development.