• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.4
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• pp.683-690
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• 2018

In this paper, a new signal processing technique is proposed for calibrating gain, phase, delay offsets in array antenna based anti-jamming minimum variance distortionless response (MVDR) global-positioning-system (GPS) receivers. The proposed technique estimates gain, phase and delay offsets across the antennas, and compensates for the offsets based on the estimates. A pilot signal with good correlation characteristics is used for accurate estimation of the gain, phase and delay offsets. Based on the cross-correlation, the delay offset is first estimated and then gain/phase offsets are estimated. For fine delay offset estimation and compensation, an interpolation technique is used, and specifically, the discrete Fourier transform (DFT) is employed for the interpolation technique to reduce the computational complexity. The proposed technique is verified through computer simulation using MATLAB. According to the simulation results, the proposed technique can reduce the gain, phaes and delay offset to 0.01 dB, 0.05 degree, and 0.5 ns, respectively.

• Korean Journal of Culture and Social Issue
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• v.10 no.spc
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• pp.69-86
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• 2004

A review of literature revealed that damaged self-confidence of men as social agents may be the primary, if not proximal, cause of domestic violence. Accumulated damages in social confidence and self-assurance may be moderated by action repertoire acquired during childhood, and mediated by adulthood circumstances such as marital discords and the lack of social support to result in the typical cycle of violence and subsequent feeling of remorse. The present treatments for the domestically violent men in Korea seem to be ineffective to reduce the number of incidents in the society because the treatments are viewed as punishments by the men, damage their social confidence further by stigmatizing them in the community, and destroy their social resources and support systems. It was suggested in this paper to reduce the role of law enforcement and correctional administration to rehabilitate the currently violent men. At the same time, it was also suggested for the Korean court to implement the paradigm of Therapeutic Jurisprudence in handling domestic violence cases. It was argued that the court should take active roles as a healing and rehabilitating agent by cooperating with non-government community establishments such as hospitals, universities and self-help organizations. The reasons and implications of those suggestions were discussed in detail.

• Proceedings of the KIEE Conference
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• 2003.11a
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• pp.409-411
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• 2003

본 논문에서는 대전류 표준측정에 대한 STL TC의 Ad-Hoc Working Group의 최종방안에 대한 기술적 배경을 소개하여 이를 계기로 국내에서도 대전류 표준확보에 필요한 사전준비에 만전을 기하고자 한다. STL의 대전류 reference shunt 요구사항, 측정 불확도 및 각 시험소에서 교정하여야 할 사항 등에 대하여 검토하고, 우리나라 대전류 표준측정시스템의 구축필요성, 구축절차 및 방안에 대하여 기술한다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.142-144
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• 1998

분산 처리 시스템은 여러 대의 컴퓨터에 분산된 프로그램들이 상호 통신을 통해 협력하면서 작업을 수행하는 시스템이다 .본 논문은 분산 처리시스템의 소프트웨어 개발을 효율적으로 지원하는 유니부(Uniview)를 개발하는 데 있어서 디스플레이 데이터의 설계 및 운용 방안을 제시한다. 디스플레이 데이터는 디버깅 작업과 관련된 정보를 효과적으로 페치, 저장할 수 있는 구조가 되어야 한다. 제안된 디스플레이 데이터 구조와 운용 방법은 디버깅 작업의 흐름에 따라 데이터를 생성, 유지하며 필요한 데이터만을 검사하여 효율적으로 운용한다.

• Proceedings of the KAIS Fall Conference
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• 2001.05a
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• pp.358-361
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• 2001

인터넷의 발전으로 우리는 빠른 시간에 많은 정보를 접할 수 있을 뿐 아니라 웹을 이용한 동적인 개인 신상관리와 교육에서 교사와 학생간에 웹을 이용한 새로운 인터페이스를 열 수 있게 되었다. 형성평가는 교사가 기계적으로 채점하고, 틀렸을 때 이를 교정해 주기보다는 스스로 학습결과의 정답을 확인하고 틀렸을 때 이에 대한 정답을 학생 자신이 찾아내도록 함으로써 형성평가의 과정 그 자체가 학습과정의 일부가 되도록 하여야 한다. 본 연구에서는 멀티미디어저작도구로 형성평가 문항을 만들어, 교사와 학생 모두 빠르고 정확하게 채점하여 즉시 결과를 확인하고 feedback 효과를 얻고자 데이터베이스 연동을 이용한 웹 기반 형성평가 방안을 제안한다.

• The korean journal of orthodontics
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• v.36 no.3 s.116
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• pp.207-217
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• 2006

Although ceramic brackets have been used widely for improved esthetics during treatment, ceramic brackets have some inherent problems; brittleness, attrition of the opposing teeth and high frictional resistance. This study was performed to understand the frictional resistance of the ceramic brackets, as well as to be a helpful reference for finding the solutions to the problem of frictional resistance. Three different kinds of brackets were used; metal bracket, polycrystalline ceramic brackets with a metal slot to reduce the high frictional resistance and monocrystalline ceramic brackets. The brackets were tested with a $.019{\times}.025$ stainless steel wire with a second order angulation of $0^{\circ}\;and\;10^{\circ}$, and the static and kinetic frictional forces were measured on the universal testing machine. The results of this study showed that the ceramic brackets, especially the monocrystalline ceramic bracket without a metal slot, generated higher frictional resistance than the metal bracket, and the frictional resistance was increased as the angulation between the bracket slot and the wire increased. Therefore, the development of the ceramic bracket with reduced frictional resistance and the prevention of excessive crown tipping during orthodontic treatment will lead to the simultaneous attainment of more efficient and improved esthetic treatment goals.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.5
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• pp.909-916
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• 2009

This paper presents the automatic vision algorithm to generate and calibrate reference phase plane to improve the accuracy of 3D measuring machine of using phase shifting projection moire method, which is not traditional N-bucket method, but is based on direct image processing method to the pattern projection image. Generally, to acquire accurate reference phase plane, the calibration specimen with well treated surface is needed, and detailed calibration method should be performed. For the cost reduction of specimen manufacturing and the calibration time reduction, on the specimen, not specially designed, with general accuracy level, an efficient calibration procedure for the reference phase generation is proposed. The proposed vision algorithm is developed to extract the line center points of the projected line pattern from acquired images, derive the line feature information consisting of its slope and intercept by using sampled feature points, and finally generate the related reference phase between line pairs. Experimental results show that the proposed method make reference phase plane with a good accuracy under noisy environment and the proposed algorithm can reduce the total cost to make high accurate calibration specimen, also increase the accuracy of reference phase plane, and reduce the complex calibration procedure to move grid via N-bucket algorithm precisely.

• Korean Security Journal
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• no.13
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• pp.23-45
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• 2007

The object of this dissertation is to teach the divorced inmates the method to deal with the conflicts which they have had. This program constitutes 10 terms session, and the participants are 6 at first, but reduced one latter. In the process of the program, when making nickname, the participants preferred the words that present their personal emotion and experience. And the participation rate by each participants were ascent more and more in accordance with the process. After the whole process of the program, we executed conflict-dealing scale test before and after the program. The result showed that 'Patience' and 'Siloam' presented change from emotional dealing to rational dealing. 'Sea', 'Jin' and 'Birth' presented higher level of emotional dealing than before the test. Therefore Through this result, we knew that conflict-dealing method program improved the skills and abilities which are used for the situation making conflicts.

• Journal of Intelligence and Information Systems
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• v.6 no.2
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• pp.1-14
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• 2000

The berth and crane scheduling problem in a container terminal encompasses the whole process of assigning berth to each ship, determining the duration of berthing, assigning container cranes to each ship, and determining the specific start and end time of each crane service, for all the ships scheduled to be arriving at the terminal during a certain scheduling horizon. This problem is basically a constraint satisfaction problem in which cranes and berths should be assigned in such a way that all the spatial and temporal constraints are satisfied without any interference. However, it is also an optimization problem because the requested arrival and departure time should be met for as many of the scheduled ships as possible, while the operation cost of the terminal should be minimized. In this paper, we present an effective and efficient approach to solving this type of problem, which combines constrain satisfaction search and heuristic repair. We first employ a constraint satisfaction search to find a feasib1e solution. Then, the feasible solution is modified to a more optimal one by iteratively applying our heuristic repair operations within the framework of constraint satisfaction search. Experimental results with a real data from Pusan East Container Terminal showed that our approach can derive a schedule of satisfactory quality in a very short time.

• The korean journal of orthodontics
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• v.28 no.3 s.68
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• pp.479-486
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• 1998

Bimaxillary Protrusion can be treated effectively in growing patients and in adults with conventional orthodontic therapy. However, In the adult patient, combined surgical and orthodontic treatment modalities may offer distinct advantages over such conventional therapy. In those cases complicate by vertical jaw dysplasia, sagittal dysplasia, or transverse skeletal discrepancy in addition to bimaxillary protrusion, the possibilities of obtaining successful results through orthodontic treatment alone greatly diminish. Surgical retraction of both maxillary and mandibular anterior segments with subapical osteotomies and ostectomies in the extraction site may be a good treatment alternative. Treatment time and possible adverse effects of lengthy orthodontic therapy may be reduced and optimum esthetic improvement may be facilitated. On the following cases, patient who had bimaxillary protrusion with Angle class III malocclusion was treated with combined orthodontic - surgical therapy by anterior subapical segmental osteotomies.