• Earthquakes and Structures
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• 제9권1호
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• pp.73-91
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• 2015

The effectiveness of tuned mass dampers (TMDs) in reducing the seismic response of civil structures is still a debated issue. The few studies regarding TMDs on inelastic structures indicate that they would perform well under moderate earthquake loading, when the structure remains linear or weakly nonlinear, while tending to fail under severe ground shaking, when the structure experiences strong nonlinearities. TMD seismic efficiency should be therefore rationally assessed by considering to which extent moderate and severe earthquakes respectively contribute to the expected cost of damages and losses over the lifespan of the structure. In this paper, a method for evaluating, in a life-cycle cost (LCC) perspective, the seismic effectiveness of TMDs on inelastic building structures is presented and exemplified on the SAC LA 9-storey steel moment-resisting frame benchmark building. Results show that the LCC concept may provide an appropriate alternative to traditional performance criteria for the evaluation of the effectiveness of TMDs and that TMD installation on typical existing middle-rise buildings in high seismic hazard regions may significantly reduce building lifetime cost despite the poor control performance observed under the most severe seismic events.

• 경영과학
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• 제13권1호
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• pp.29-46
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• 1996

In the past decade, considerable effort has been devoted unsuccessfully to the development of information technology (IT) evaluation frameworks in the information systems area. Based on the literature review in this area and the decision analysis field, two competing evaluation frameworks are developed in this study: the direct evaluation framework and the indirect evaluation framework. A case study on Firm K shows that the latter is more practically efficient and theoretically appropriate but requires the adequate training for practitioners in order not to get confused the weight of an evaluation variable with the product of this weight and the score of the variable. Another finding is that Weill's conversion effectiveness is neither possible nor necessary to measure in the process of evaluating an IT although it is in theory an important concept.

• 한국임상약학회지
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• 제18권2호
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• pp.75-83
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• 2008

Purpose: Currently lung cancer ranks second in cancer for incidence rate and is a disease that ranks first for a death rate by cancerous growth because it is already advanced at the time of diagnosis. The purpose of this paper was to analyze the factors that affect the effectiveness of and rash occurrence by Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitor (EGFR TKI) in patients with non-small cell lung cancer. Methods: A retrospective chart review of 100 patients, who took EGFR TKI (erlotinib, gefitinib) among patients who were diagnosed with non-small cell lung cancer in a Hospital in Korea between May 2005 and February 2008, was conducted. The drug effectiveness was evaluated by Response Evaluation Criteria In Solid Tumor. Results: EGFR mutation was the only factor associated with drug response (complete response and partial response). When stable disease was added to drug response as the evaluation parameter, ECOG and rash as well as EGFR mutation were found to be important factors. Survival, however, was not affected by EGFR mutation. The factors influenced on survival were older age (${\geq}65$), low ECOG ($1{\sim}2$), adenocarcinoma and rash. In the case of rash, group with EGFR mutation or low ECOG showed significantly higher chance of occurrence. There was no significant difference in rash occurrence between gefitinib and erlotinib groups. Conclusions: Based on the results, EGFR mutation positive and low ECOG ($1{\sim}2$) were significantly important factors for both effectiveness of EGFR TKI and rash occurrence. Also, rash itself was found to be an independently significant factor for the disease control and survival. Therefore, while administering EGFR TKI, patients who have the factors associated with rash occurrence should be closely monitored for effective and safe drug therapy.

• 한국철도학회논문집
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• 제11권6호
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• pp.562-568
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• 2008

현대의 물류는 파렛트를 활용한 일관운송체계로 변화하고 있다. 더불어 포장용기의 적재율과 타 수송수단과의 정합성을 높이려는 노력도 병행되고 있다. 이와 같은 일련의 추세는 물류의 효율화를 통한 물류비 절감이라는 명제에 기반을 둔다. 파렛트를 이용한 일관수송에서 기본이 되는 것은 포장의 단위이다. 개별 포장의 크기와 형태가 포장용기의 적재율을 최대화시키도록 하는 것이 관건이기 때문이다. 또한 포장용기는 이차적으로 수송수단의 적재함이나 보관시설 등 연관된 물류활용에 영향을 미치기 때문에 포장의 단위가 미치는 파급의 범위는 넓다. 본 연구의 목적은 포장모듈 표준화 사업의 효과를 평가하는 척도(MOE)를 선정하고 이를 반영한 평가모형을 개발하는데 있다. 선행연구의 사례와 타 학문분야의 계량화 방법 등을 토대로 포장모듈의 표준화가 물류산업에 미치는 영향을 파악하고 이를 계량화하는 방안을 제시한다. 연구의 방법론적 측면에서 볼 때 물류활동 부문별로 나타나는 포장모듈 표준화의 효과를 어떠한 방법으로 계량화하고 가중치를 두어 하나의 대표값으로 추출하느냐가 관건이 된다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 Proceedings of the Korea Automatic Control Conference, 11th (KACC); Pohang, Korea; 24-26 Oct. 1996
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• pp.87-90
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• 1996

Inherently safe plants are maintained through the systematic identification of potential hazards, and various hazard evaluation methods have been developed. Recently, much effort is given into the development of automated hazard evaluation system by introducing the expert system. An automated system will help to obtain consistency and to make the result more reliable. HAZOP study is one of the most systematic and logical evaluation procedure. However, it has disadvantages: experts should participate at the same time, the detailed study requires much man-hour, and the results depend on the expertise of the experts. Therefore, the automation of hazard evaluation is necessary to reduce the required time and to get the consistent evaluation results. In this study, HAxSYM, an expert system to automate HAZOP study, is developed. The case studies are performed to validate the effectiveness of the developed system, and the results are compared to the results of traditional method.

• 대한인간공학회지
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• 제32권5호
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• pp.443-448
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• 2013

Objective: Purposes of this study are selecting main factors in evaluating the usability of mobile navigation and comprehending mutual importance among the factors. Background: Mobile navigation services have been more diffused than ever as the number of smartphone users sharply increased. However users are having trouble with the usage of mobile navigation services due to the lack of research in the area. Method: In order to attain results, general research on mobile navigation, 1st general survey, and 2nd comparative survey on navigation UI experts were performed. Empirical studies about the results were performed using AHP method. Results: As the result of AHP analysis, accuracy was drawn out to be the most important factor followed by accessibility and visibility. Regarding the characteristics of navigation system, the provision of accurate POI(Point of Interest) was considered to be the most important factor for the experts. And effectiveness was considered to be the most important, followed by satisfaction and efficiency. Conclusion: When evaluating the usability of mobile navigation, prior factors such as accuracy, visibility, and aesthetics should be considered in advance and general evaluation concentrated on effectiveness must be performed. Application: The results of this study are expected to be a fundamental data to mobile navigation design.

• 한국국방경영분석학회지
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• 제17권2호
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• pp.31-43
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• 1991

The fire effectiveness and the operationability of the ground weapon system (such as tank, armored vehicle, howitzer, MLRS, ${\cdots}$), whose operations are usually happened on the ground, are dependent not only on their performances but also on the terrain environments. Especially, the artillery weapons systems' effectiveness is largely varied, because their maneuverability (such as translation, occupation of their sites) and the fire effectiveness are very dependent on the terrain. In this paper, presented are the methods how to analyze the terrain using the digital terrain data. And a software (which are implemented on the IBM PC compatible personal computer) is developed for the analysis of the terrain using the various method of computer Aided Geometric Design and Modeling. The S/W is expected to be very useful for the evaluation of the artillery weapon systems and for the commanders' decision making.

• 한국콘텐츠학회논문지
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• 제14권3호
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• pp.314-327
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• 2014

본 연구는 간호대학 4학년 학생의 학습유형에 따른 응급상황관리 시뮬레이션 교육의 효과를 확인하고자 실시된 단일군 사전-사후 유사실험 연구이다. 연구 대상자는 4년제 간호대학에 재학 중인 58명의 학생이었으며, 연구는 2013년 6월 24일부터 7월 12일까지 실시되었다. 구조화된 설문지를 이용하여 간호대학 4학년 학생의 학습유형과 교육효과(비판적 사고성향, 문제해결과정, 협력, 실습만족도, 자신감)를 조사하였으며, 서술통계, t-test, ANOVA, Mann-Whitney U 검정, Kruskal-Wallis를 이용하여 자료를 분석하였다. 간호대학 4학년 학생의 학습유형은 수렴자 46.6%, 융합자 34.5%, 적응자 15.5%, 분산자 3.4%이었다. 응급상황관리 시뮬레이션 교육은 비판적 사고성향, 문제해결과정, 협력, 자신감에 유의한 향상을 보였으나, 학습유형에 따른 교육효과는 유의한 차이를 보이지 않았다. 이를 기초로 학습유형과 시뮬레이션 교육효과 간의 관계에 대한 재고찰을 통해 시뮬레이션 교육의 효과를 극대화시킬 수 있는 방안의 모색이 필요할 것이다.

• 대한한의학회지
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• 제36권3호
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• pp.84-97
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• 2015

Objectives: The purpose of this study was to investigate and analyze the demands for educational programs on clinical trials of Korean medicine devices, and develop training programs based on the needs of Korean medicine. Methods: This research was conducted targeting 26 volunteer applicants who had participated in clinical trials of Korean medicine devices within the last five years (2010-2015). The survey was carried out between May 1, 2015 and May 26, 2015 via e-mail. After receiving questionnaire replies, the material was established. Using obtained data, frequency analyses were performed using SPSS 20.0 version. Results: 92% of the researchers who participated in the survey expected introduction of educational programs on clinical trials and anticipated that programs contain information that can meet the needs of each researcher. In addition, according to the analysis, introducing expert certification for clinical trials of Korean medicine devices is necessary, and offering related graduate courses are also needed. Conclusions: As a result of this study, researchers had difficulties during clinical trials of Korean medicine devices. If the educational programs were to be developed and institutional frameworks support them effectively, it would prove to be helpful to researchers in clinical trials.

• 한국물환경학회지
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• 제25권1호
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• pp.37-47
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• 2009

This study analyzes the effect of alternatives and estimates alternatives evaluation index (AEI) using PCSWMM and weighted summation method. PCSWMM considering combined sewer overflows (CSOs) in the Mokgamcheon watershed was used and effectiveness analysis of alternative was conducted to develop not only flowrate but also the pollutant of BOD and SS. Indicators of AEI are selected using sustainability evaluation concept, driver-pressure-state-impact-response (DPSIR) framework and calculated by weighted summation method. After estimating AEI, alternatives was classified into three groups G (Good), A (Acceptable) and P (Poor) grade. As a results, it is analyzed that alternatives applied to Oryucheon were G grade and those of Yeokgokcheon were P grade and the remainings were 'A' grade. This result will be effective to the integrated watershed management for sustainablility.