• Journal of applied mathematics & informatics
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• 제28권1_2호
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• pp.439-450
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• 2010

In this paper, we propose a new idea to evaluate the prediction accuracy of user's preference generated by memory-based collaborative filtering algorithm before prediction process in the recommender system. Our analysis results show the possibility of a pre-evaluation before the prediction process of users' preference of item's transaction on the web. Classification functions proposed in this study generate a user's rating pattern under certain conditions. In this research, we test whether classification functions select users who have lower prediction or higher prediction performance under collaborative filtering recommendation approach. The statistical test results will be based on the differences of the prediction accuracy of each user group which are classified by classification functions using the generative probability of specific rating. The characteristics of rating patterns of classified users will also be presented.

• 한국기계가공학회지
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• 제2권1호
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• pp.51-56
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• 2003

A custom application system, which was based on the finite element analysis, for stress on the head-skirt junction of a hot pressure vessel was developed. This is useful computer-based analysis system which designed to provide an analysis technique and knowledge conveniently available to other people. It was found the evaluation of thermal stress of several typed skirt joint of a pressure vessel could be performed early using this system.

• 정보통신설비학회논문지
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• 제10권4호
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• pp.135-142
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• 2011

This paper proposes a performance evaluation method for power consumption of set-top box (STB) stand-by mode transition schemes. A stand-by mode transition scheme characterizes the timing of mode transition. The timing of mode transition affects the duration of stand-by mode operation, and the power consumptions of STB as well. Recently a fast stand-by mode transition scheme (FMT) has been proposed based on user input for selecting the device to be connected to TV. In this paper, we evaluate power consumption of FMT and a conventional mode transition scheme. For the computation of the duration of stand-by mode operation, the user input events are modeled as Poisson process. Simulation results based on the modeling reveals that the proposed scheme is more effective in power saving than the conventional scheme by up to 30%.

• 대한전기학회논문지:전력기술부문A
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• 제53권2호
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• pp.111-120
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• 2004

This paper presents an application of Unified Modeling Language(UML) software technique for developing transmission pricing evaluation package. Also, this paper describes a transmission pricing algorithm applicable to a large-scale power system. The usage-based transmission pricing mechanism is very complex since it requires power flow analysis, fault current analysis, sensitivity evaluation of a transmission line, penalty factors calculation, transmission asset databases, and cost allocation rules, etc. For the efficient and flexible development of the transmission pricing package, a UML. approach is applied, which is composed of a use-case diagram, interaction diagram, class diagram, and package diagram using Rational Rose Unified Process(RUP). The designed transmission pricing package can be efficiently modified and reused as the market environments evolves since it is designed by Object-Oriented Programming(OOP).

• 한국게임학회 논문지
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• 제11권6호
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• pp.53-60
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• 2011

게임 서비스를 위한 소프트웨어의 경우 그 신뢰도에 대한 중요성은 지속적으로 증가하고 있다. 따라서 소프트웨어 신뢰도에 대한 평가 또한 매우 중요하다. 본 연구에서는 개발 공정에 대한 대표 활동인 확인 및 검증이 소프트웨어 신뢰도에 어떠한 영향을 미치는가를 정량적으로 분석하기 위하여 실험을 수행하였다. 이러한 실험 결과는, BBN (Bayesian Belief Network) 기반 신뢰도 평가와 같이, 개발 공정에 근거하여 신뢰도를 평가할 때 매우 유용한 근거 자료로 활용될 것이다.

• 대한안전경영과학회지
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• 제23권4호
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• pp.67-72
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• 2021

To ensure the safety and functionality of a railroad bridge, maintaining the integrity of the bridge via continuous structural health monitoring is important. However, most structural integrity monitoring methods proposed to date are based on modal responses which require the extracting process and have limited availability. In this paper, the applicability of the existing damage identification method based on free-vibration reponses to time-domain deflection shapes due to moving train load is investigated. Since the proposed method directly utilizes the time-domain responses of the structure due to the moving vehicles, the extracting process for modal responses can be avoided, and the applicability of structural health evaluation can be enhanced. The feasibility of the presented method is verified via a numerical example of a simple plate girder bridge.

• 대한감각통합치료학회지
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• 제9권2호
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• pp.1-13
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• 2011

목적 : 본 연구는 한 아동을 대상으로 이루어진 작업치료중재서비스 안에서 이루어진 OTIPM의 적용 사례를 소개하고, 그 OTIPM에 기반한 임상적 추론과정과 재평가의 유익함과 시사점을 고찰하는 데 그 의의가 있다. 연구방법 : 대상 아동에 대한 작업치료중재서비스 안에서 OTIPM이 적용된 구체적 실행과정을 네 개의 주요부분으로 구분하여 기술하였다. 1) 클라이언트 중심의 수행문맥 확립; 2) 기초선 확립 및 원인해석(초기평가); 3) 중재 계획 및 실행; 4) 중재효과 확인(재평가). 수행 문맥은 보호자와의 면담을 통해 확립하였으며 초기평가 및 재평가에서 사용된 평가도구는 임상관찰 및 일본감각력평가(JSI-R), 덴버발달검사(DDST-2), 사회성숙도, 녹스학령전기놀이 척도(KPPS-R), 과제수행평가이다. 과제수행평가에서는 작업치료 실행 체계(Occupational Therapy Process Framework)에 의거한 수행기술 즉, 운동, 처리, 및 사회적 상호작용기술들을 평가하였으며, 표준화 된 수행기술검사인 운동처리기술검사(Assessment of Motor and Process Skill)와 사회기술평가(Evaluation of Social Participation)의 평가 체계를 사용하였다. 작업치료중재는 회복적모델의 감각통합치료활동과, 교육적모델의 보호자교육과, 습득적모델의 작업수행기술훈련이 계획되었으며, 일주일에 2회씩 총 4개월간 진행되었다. 결과 : 재평가 결과 사회연령과 사회성지수가 대상 아동의 연령에 맞게 향상되고, 전반적인 발달수준이 약 2년가량 향상되며, 전체적인 놀이수준 또한 13개월 향상되었다. 작업에 기반을 두어 설정되었던 중재 목표가 성취되었다. 아동의 보호자는 아동의 작업수행과 작업치료서비스에 대한 만족을 서술적으로 보고하였다. 결론 : 본 사례에서 작업치료사는 OTIPM에 기반하여 포괄적인 수행문맥을 확립하고 클라이언트 중심의 작업에 기반한 중재를 제공할 수 있었다. 임상적 추론을 통해 수행의 어려움의 원인을 보다 명확히 파악하여 수행의 하위요소뿐만 아니라 수행 전반의 향상을 이끌어내는 치료를 제공할 수 있었다. 뿐만 아니라 OTIPM에서 정의한 '클라이언트 무리'의 개념을 적용하여 클라이언트의 만족도를 이끌어내는 중재도 계획할 수 있었다. 본 연구를 통해, OTIPM이 클라이언트 중심의 작업수행의 성취도와 만족도 모두를 고려한 중재과정을 지향함으로써 '구체적인 작업참여의 포괄적인 향상'을 이끌어내는 데 유익한 작업치료중재과정모델임을 확인 할 수 있다.

• 한국안전학회지
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• 제22권6호
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• pp.35-40
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• 2007

As a way of improving the safety of the chemical facilities, the risk based-inspection(RBI) was executed for the facilities of the applied petrochemical plant using KS-RBI Ver. 3.0 program developed based on the API-581 based resource document(BRD). From an evaluation result of KS-RBI program, we could find the evaluation of the process safety management(PSM) for the applied plant, risk of the applied process, risk of static facilities and pipes, and the demage mechanism of the facilities. Also, we could suggest a proper inspection plan(frequency and method of inspection) using the calculated risk and the status of the facilities. Therefore, the applied plant could be achieved a reduced inspection cost by an extension of inspection frequency, improved productivity, improved reliability of the facilities, and a computerized history management.

• 디지털융복합연구
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• 제7권2호
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• pp.51-62
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• 2009

Most studies of organizational effectiveness previously done, have measured financial performance such as productivity, efficiency or subjective performance such as a commitment, satisfaction, and turnover intention of employees. However, these measurements have limitations to evaluate a organizational effectiveness in recent knowledge information era because evaluation of organizational effectiveness in knowledge-based society needs measurements in various aspects such as financial, customer, internal business process, and learning and growth. The purpose of this study is to overcome these problems and to introduce an appropriate system for evaluation of organizational effectiveness under knowledge management paradigm. In this paper, we suggest a Balanced Scorecard(BSC) as a new measurement standard of organizational effectiveness in a knowledge information era. The balanced scorecard is designed to help firms that have historically overemphasized short-term financial performance. When measuring organizational effectiveness through Balanced Scorecard(BSC) suggested by Kaplan and Norton[31], it is to present the measurement indices that can cover the limitation of the past evaluation indices of organizational effectiveness.

• 공학교육연구
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• 제18권6호
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• pp.24-31
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• 2015

The purpose of this study is to develop the model of course evaluation design for CEA(Course-Embedded Assessment), which is focused on course level for assessment reliability. This study was conducted by the process of model development and validation according to Richey & Klein(2007)'s model development methodology. The model of this study was comprised with the three steps of learning objectives based on course outcome, assessment design and goal achievement analysis of course, which were explained by specific design principles. Also, this model was validated by two steps, which one was on the inner validation and the other was the outer validation(Richey & Klein, 2007). Considerations for designing the model of course evaluation have been suggested and a few implications were discussed.