• 전기학회논문지
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• 제65권10호
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• pp.1746-1754
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• 2016

In this paper, we provide a development and evaluation method for an archery posture analyzing system, using an inertial sensor. The system was developed using LabVIEW2014 by National Instruments and evaluated using the DTW algorithm. To convert the voltage value of the inertial sensor into a physical value, a coordinate transformation matrix bias was applied. To evaluate the similarity of movement in archery shooting, the DTW distance was calculated and similarity was confirmed based on simple mechanical movement, the same person's shooting movement, shooting movement with another person, and the noise signal. The average similarity comparison results were as follows: simple mechanical movement was 17.05%, the same person's shooting movement was 26.48%, shooting movement with another person was 62.8%, and the noise signal was 328.5%; a smaller value indicates a higher level of similarity. We confirmed the possibility of analyzing the archery posture using 3-axis acceleration of the inertial sensor. We inferred that the proposed method might be important means for assessing shooting skills, evaluation of archer's progress, and finding talented archers in advance.

• 제어로봇시스템학회논문지
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• 제7권9호
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• pp.774-782
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• 2001

In this paper, we propose a new approach to the autonomous and high-speed indoor navigation of wheeled mobile robots using hybrid system controller. The hierarchical structure of hybrid system presented consists of high-level reasoning process and the low-level motion control process and the environmental interaction. In a discrete event system, the discrete states are defined by the user-defined constraints and the reference motion commands are specified in the abstracted motions. The hybrid control system applied for the nonholonomic mobile robots can combine the motion planning and autonomous navigation with obstacle avoidance in the indoor navigation problem. For the evaluation of the proposed algorithm, the algorithm is implemented to the two-wheel driven mobile robot system. The experimental results show that the hybrid system approach is an effective method for the autonomous navigation in indoor environments.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.92-97
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• 2006

지금까지 건설산업은 재무 중심의 성과측정에 주로 의존하여 왔다. 또한 성과측정시스템에 관한 연구는 대부분 프로젝트 레벨에서 이루어졌다. 그러나 최근 들어 산업 또는 기업 레벨의 성과측정 및 관리에 대한 요구가 높아지고 있다. 최근의 몇몇 선행연구들은 기업 레벨의 성과측정을 위한 지표, 측정방법, 개념적 모델 등을 제시한 바 있다. 본 연구는 이러한 연구 결과들을 활용하여 건설산업 참여기업들(발주기업, 건설회사, 설계 ${\cdot}$ 엔지니어링회사)을 위한 web 기반의 성과 및 정보화수준 측정 시스템을 개발하였다. 또한 국내의 78개 기업들로부터 수집한 성과 데이터를 이용한 시스템 테스트 및 성과분석을 수행하였으며, 마지막으로 시스템의 개선 및 효과적 활용을 위한 이슈들을 제시하였다.

• 공학교육연구
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• 제19권1호
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• pp.47-53
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• 2016

New occupational qualification system built on NCS(National Competency Standard) aimed to induce industries, the final appliers of qualification, to play a leading role in designing qualification and to spontaneously apply such qualification standard to employment and promotion so as to reinforce universality of qualification. In this study, we verified the validity of NCS level of qualification categories for 130 occupational fields by redesigning NCS-based new occupational qualification system with a focus on 7 major areas, including mechanical field, which were found to have wide-ranging social ripple effect throughout society and high acceptability in 2014. The results of study on suitability at qualification level suggested the followings: First, there is a difference in number of competency units for each qualification category, depending on area. New qualification covering 7 major areas included 15.3 competency units for each qualification category, which exceeds the number of competency units(about 10 units) in subdivided NCS. By field, some difference was found with 7.9 competency units for cultural field and 22.6 competency units for information and communication area. Second, preference above normal level was observed in the criteria, procedure and method for determining qualification redesigning. However, preference below normal level was exhibited in connection with possibility of linkage with overseas qualifications, although preference was above normal level in relation to the suitability of design/qualification level and qualification categories based on lifelong career development path within scope of NCS as the criteria for determining the redesign of qualification categories. Second, we compared NCS level and SC(Sector Council level, and the results showed that NCS level was found to be somewhat well-defined. For the qualifications with different definitions, it was deemed difficult to determine superiority between NCS level and SC level. However, majority opinion indicated that it would be desirable to follow NCS level because NCS was created through collection of opinions for a prolonged period.

• 한국항공운항학회지
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• 제27권3호
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• pp.45-53
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• 2019

The purpose of this study is to provide a brief overview of the helicopter pilot training system applied to the Army, and to examine what factors positively affect the successful flight training of helicopter pilots. For this purpose, we analyzed the correlations between various factors such as individual characteristics, selection factors, flight aptitude evaluation, theoretical subjects test, and self-life evaluation. As a result, it was found that only the flight experience was influential on the individual characteristics at the beginning of the training course, and the learning achievement represented by the test of theoretical subjects was positively influenced throughout the flight training course. This reaffirms the fact that an individual's high level of motivation or effort influences his flight training performance. These results are expected to be useful indicators for future development of pilot selection system and pilot training system.

• 전기학회논문지
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• 제64권11호
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• pp.1535-1542
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• 2015

An increasing number of electric vehicles (EVs) in power system affects its reliability in various aspects. Especially under high EV penetration level, new generating units are required to satisfy system's adequacy criterion. Wind power generation is expected to take the major portion of the new units due to environmental and economic issues. In this paper, the system reliability is analyzed using Loss of Load Expectation (LOLE) and Expected Energy Not Served (EENS) under each and both cases of increasing wind power generation and EVs. A probabilistic multi-state modeling method of wind turbine generator under various power output for adequate reliability evaluation is presented as well. EVs are modeled as loads under charging algorithm with Time-Of-Use (TOU) rates in order to incorporate EVs into hour-to-hour yearly load curve. With the expected load curve, the impact of EVs on the system adequacy is analyzed. Simulations show the reliability evaluation of increasing wind power capacity and number of EVs. With this method, system operator becomes capable of measuring appropriate wind power capacity to meet system reliability standard.

• 한국정밀공학회지
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• 제10권3호
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• pp.69-80
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• 1993

It is important to prevent roll failure in hot rolling process for reducing maintenance coat and production loss. Roll material and rolling conditions such as the roll force and torque have been intensively investigated to overcome the roll failures. In this study, a computer roll life prediction system under working condition is developed and evaluated on IBM-PC level. The system is composed and fatigue estimation models which are stress analysis, crack propagation, wear and fatigue estimation. Roll damage can be predicted by calculating the stress anplification, crack depth propagation and fatigue level in the roll using this computer model. The developed system is applied to a work roll in actual hot rolling process for reliability evaluation. Roll failures can be diagnosed and the propriety of current working condition can be determined through roll life prediction simulation.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2004년도 춘계학술발표회
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• pp.1-6
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• 2004

본 연구는 해양사고 피해규모에 의한 위험수준을 평가하였다. 이러한 위험수준 분석은 정량적분석보다 전문가에 의한 정성적 분석이 용이하다. 우리나라 RCC 및 RSC 수색$\cdot$ 구조구역에 대한 위험수준 평가를 위해 본 연구에서는 전문가 지식에 기반한 퍼기이론과 계층분석법을 이용하였다. 본 연구의 퍼지이론은 퍼지확장원리에 의한 최대최소화 합성이고, 비퍼지화는 무게중심법을 이용하였다. 그 결과 태안, 군산, 목포, 여수, 통영, 부산 제주지역은 위험수준이 심각한 것으로 평가되어, 향후 위험수준을 경감 하기위해 많은 구조선과 구조장비가 필요 할 것으로 판단된다.

• 한국항해항만학회지
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• 제28권10호
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• pp.909-915
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• 2004

본 연구는 해양사고 피해규모에 의한 위험수준을 평가하였다. 이러한 위험수준 분석은 정량적분석보다 전문가에 의한 정성적분석이 용이하다. 우리나라 RCC 및 RSC 수색${\cdot}$구조구역에 대한 위험수준 평가를 위해 본 연구에서는 전문가 지식에 기반한 퍼지이론과 계층분석법을 이용하였다. 본 연구의 퍼지이론은 퍼지 확장원리에 의한 최대최소화 합성이고, 비퍼지화는 무게중심법을 이용하였다. 그 결과 목포 수색${\cdot}$구조 구역에 위험수준이 가장 놀은 것으로 평가되어, 향후 위험수준을 경감 하기위해 많은 구조선과 구조장비가 필요 할 것으로 판단된다.

• 디지털융복합연구
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• 제9권5호
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• pp.141-156
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• 2011

정보시스템 감리에서 발생하는 감리인의 주관적인 판단은 감리 의견에 대한 신뢰성을 저하시키는 요인이 되고 있다. 본 논문은 정보시스템 감리에서 요구사항의 중요성과 감리 평가에 대한 객관성의 향상을 위하여 요구사항 우선순위를 통한 감리 정량화 모델을 제시하였다. 요구사항의 가치는 동일한 레벨에 있지 않다는 전제하에 고객 요구사항 기준으로 평가하였다. 또한 요구사항 우선순위 기준에 대한 세부적인 평가 지표를 발주자 측면 요소인 서비스 중요도와 기능 만족도, 사업자 측면 요소인 비용과 일정으로 세분화하여 객관적인 감리 수행 결과의 정량화를 가능하게 하여 감리의 객관성을 향상시키도록 하였다.