• 융합보안논문지
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• 제13권2호
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• pp.101-109
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• 2013

이 연구는 전쟁사 과목에 대하여 2012년 2학기 15주 중 중간고사와 기말고사 주를 제외한 13주간 이루어졌으며 자료의 수집과 동시에 자료의 분석이 이루어졌다. 1개 학기 동안 경험적 연구를 통하여 전쟁사 강좌 문제중심학습법이 효율적이었는지에 대하여는 좀더 연구가 필요하다. 한 학기 동안의 분석해서 나온 개념에 대해서는 강의 시간을 이용하여 학생들과 대화를 가지는 시간을 통해 확인 및 타당화하는 과정을 가졌다. 학생은 1학년 1개반 45명을 대상으로 5명씩 조를 편성하여 9개조로 운영하였다. 연구결과를 요약하면, 초기 교육진행시에는 조별로 진행되는 집단학습의 적응과 학습과정의 불확실성, 제시된 상황에 대한 상황조치 방법 구체화 어려움, 군인이 되고자 하는 의지와 실제 지식의 부족에서 오는 자신감 결여, 조별 토의에서 자신의 역할 미흡에 대한 반성, 자가학습의 중요성과 필요성 인식, 실제 이론과 상황조치간의 괴리 등을 경험하였다. 수업의 중간에는 수업준비의 부담감, 지금 공부하는 것이 과연 임관 후 활용할 수 있을 것인가에 대한 회의감과 갈등, 그러면서도 교수의 지도에 따라 상황조치 완료후 만족감, 학습에 대한 확신감 등을 체험하였다. 수업의 말기에는 자긍심과 자신감 회복, 문제해결의 잠재력 향상, 임관 후 병사들 지도에 대한 자신감 등을 경험하는 것으로 나타났다. 최근 교수법에 대하여 많은 대학에서 관심을 가지고 있다. 교수는 어떻게 학생들의 능력을 이끌어내고 향상시키는 것인가에 초점을 둔 교육을 지향해야 한다. 사회에서 요구하는 인재 양성을 위해 현 상황에서 적용할 수 있는 가장 이상적인 교수법이 무엇인가에 대한 과제는 계속 연구해야한다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.523-528
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• 2008

The accurate distribution of flow rate has been a very important part to control the air change rate since introduction of house ventilation system. An inappropriate selection of fan due to incorrect prediction of pressure loss in duct brings energy loss. In the previous study the pressure loss of general spiral duct was measured and database was constructed for finding correct loss factors in fitting upper stream. The purpose of this study is to compare and investigate the error range of flow rate by applying T-Method to bilateral symmetry and asymmetry layout of duct. The results of this study are as following. It is demanded to decide accurate size under duct design for house ventilation system. Because the small amount of Flow rate was considered at that time. The error range was 3.17% on case1 and 3.52% on case2. The error range difference was 0.35%.

• 농촌지도와개발
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• 제17권2호
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• pp.153-184
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• 2010

This study aims to investigate how the mentoring program affects married immigrant women and their mentors. The mentoring program as a man-to-man program was conducted in 2009 and provided married immigrant women with an agricultural education program. This study used a case study as a research method and collected data using interviews and observations. Participants were selected according to Patton's (2002) purposeful sampling strategies, and the results of data analysis were evaluated by the method of Evaluation Checklist. In order to increase the internal validity of the study, this study used both triangulation and peer examination. By including the diverse aspects of the mentoring program, this study shows that each case has special characteristics according to the situations of married immigrant women and their mentors. As a result, this qualitative research project provided the detailed picture of the mentoring program by specifically describing how married immigrant women had a relationship with their mentors.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.90-95
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• 2004

In this study, we proposed new method to mitigate tensile welding residual stress for preventing PWSCC in CRDM nozzle. Residual stress analysis using finite element method is performed to confirm benefit of the new method. In case of applying existing method, tensile axial residual stress decrease by about 28% and tensile hoop residual stress decrease by about 33%. In case of applying the new method, tensile axial residual stress decrease by about 32% and tensile hoop residual stress decrease by about 43%. Therefore, we conclude the new proposed method is more effective to prevent PWSCC than existing method.

• Architectural research
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• 제23권4호
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• pp.67-73
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• 2021

An efficient demolition process requires the optimum method selection considering stability, economic feasibility, environment, and workability. In reality the construction cost and period are priority concerns, and safe construction methods are neglected. In addition, the choosing demolition method is often determined subjectively by experienced field engineers. This research paper presents a multi-criteria decision-making method using Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) to select the optimum demolition method. Three experienced demolition engineers' opinions were used to develop the TOPSIS model. The case study showed that the preferences of ten attribute measurements for demolition method selection. Authors suggested the most preferable demolition method for the case study project.

• 한국콘텐츠학회논문지
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• 제12권2호
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• pp.284-291
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• 2012

본 연구는 2004년 이후 최근까지의 위기관리 분야 사례연구 논문의 연구경향을 연구문제 및 사례 대상에 대한 분석과 일반화 과정에 초점을 두며, 과학적 추론으로써 사례연구방법 활용에 있어서 향후 연구의 발전방안을 제시하고자 하였다. 분석 결과 현재 한국에서의 위기관리 분야 연구는 거의 대부분이 개별기술적 사례연구로서 위기관리 분야의 개별 분과학문으로서의 발전을 위한 이론 형성에 기여할 수 있는 연구가 드문 것으로 나타났으며, 연구설계에 있어서도 보다 치밀한 사례연구의 설계를 위한 연구문제의 규정 및 사례선정의 논리, 자료분석을 위한 틀을 구체적으로 제시하는 경우가 드문 문제점이 나타나 향후 사례연구 방법에 대한 접근에 있어 연구자들의 연구설계에 대한 심도 있는 접근이 요구된다 할 것이다.

• Journal of Information Technology Applications and Management
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• 제13권1호
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• pp.77-94
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• 2006

Case-based Reasoning (CBR) is widely used in business and industry prediction. It is suitable to solve complex and unstructured business problems. Recently, the prediction accuracy of CBR has been enhanced by not only various machine learning algorithms such as genetic algorithms, relative weighting of Artificial Neural Network (ANN) input variable but also data mining technique such as feature selection, feature weighting, feature transformation, and instance selection As a result, CBR is even more widely used today in business area. In this study, we investigated the usefulness of the CBR method in forecasting success in implementing ERP systems. We used a CBR method based on the feature weighting technique to compare the performance of three different models : MDA (Multiple Discriminant Analysis), GECBR (GEneral CBR), FWCBR (CBR with Feature Weighting supported by Analytic Hierarchy Process). The study suggests that the FWCBR approach is a promising method for forecasting of successful ERP implementation in Small and Medium sized Enterprises.

• Journal of Positioning, Navigation, and Timing
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• 제7권3호
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• pp.155-163
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• 2018

This study examined methods to enhance navigation performance and reduce the divergence of navigation solutions that may occur in the event of global positioning system (GPS) failure by integrating the GPS/inertial navigation system (INS) with the three-dimensional (3D) magnetic vector measurements of a magnetometer. A magnetic heading aiding method that employs a magnetometer has been widely used to enhance the heading performance in low-cost GPS/INS navigation systems with insufficient observability. However, in the case of GPS failure, wrong heading information may further accelerate the divergence of the navigation solution. In this study, a method of integrating the 3D magnetic vector measurements of a magnetometer is proposed as a countermeasure for the case where the GPS fails. As the proposed method does not require attitude information for integration unlike the existing magnetic heading aiding method, it is applicable even in case of GPS failure. In addition, the existing magnetic heading aiding method utilizes only one-dimensional information in the heading direction, whereas the proposed method uses the two-dimensional attitude information of the magnetic vector, thus improving the observability of the system. To confirm the effect of the proposed method, simulation was performed for the normal operation and failure situation of GPS. The result confirmed that the proposed method improved the accuracy of the navigation solution and reduced the divergence speed of the navigation solution in the case of GPS failure, as compared with that of the existing method.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.180-185
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• 1998

There has been considerable controversy as to the treatment method of dislocation of the acromioclavicular joint, so various operative treatment modalities have been suggested. We analyzed the results of 40 patients with acromio­clavicular dislocation, in whom twenty patients were treated by modified Phemister method and 20 patients by modified Weaver-Dunn method above follow-up two years. The purpose of this study was to compare the clinical results of two operative methods. According to Weitzman criteriae for clinical results, 12 cases were excellent, six cases good and two cases fair in modified Phemister method. But in modified Weaver-Dunn method, ten cases were excellent, eight cases good, one case fair and one case poor. In radiological result, coracoclavicular distance was measured at preoperative, postoperative and last follow-up period. The modified Phemister method was 6.lmm, 1.5mm and 2.4mm respectively, and the modified Weaver-Dunn method 7.8mm, 2.lmm and 2.5mm respectively. The complications were two cases of heterotopic ossification, one case of inadequate fixation and one case of K-wire breakage in modified Phemister method, and two cases of early fixation loss and one case of heterotopic ossification in modified Weaver-Dunn method. We obtained that the clinical, functional and radiological results showed no significant difference in two methods. The modified Phemister method was effective treatment for old patients in acute injuries due to short operation time and simple technique. The modified Weaver-Dunn method, as a reconstructive operation that reduces various complications for young and active male patients, was also good for getting the stability of coraco­clavicular ligament through clavicular bony union.

• 대한기계학회논문집
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• 제14권3호
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• pp.503-512
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• 1990

본 연구에서는 하중작용점(혹은 변위제어점)이 일점이고 스탭 백 현상이 없는 문제에 유용한 페널티 방법(penalty method)을 제안하고, 스냅 백 현상이 수반되는 경 우에는 페널티 방법과 Riks 방법을 선택적으로 취할 수 있도록 한다. 그리고 하중 작용점이 일점 혹은 그 이상의 점일 경우에 대해서는 Riks 방법을 기준으로 하되 일정 조건하에서는 새로운 증분하중 파라미터를 선택할 수 있게 하여, 순수한 Riks 방법으 로만 계산할 때에 일어날 수 있는 발산을 없앨 수 있게 한다. 끝으로 변위제어점이 일점 혹은 그 이상의 점인 경우에 대해 'Riks형 방법(Riks' type method)'을 제안하고, 이때에도 Riks형 방법을 기준으로 게산하되 일정한 조건하에서는 새로운 증분변위 파 라미터를 선택적으로 취할 수 있게 한다.