• 대한인간공학회지
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• 제16권1호
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• pp.107-117
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• 1997

It is necessary to evaluate HMI inaspects of human factors in the design stage of MMIS(man machine interface system) and feedback the result of evaluation because operators performance is mainly influenced by the HMI. Therefore, the MMIS design should be reflected the operators psychological, behavioral and physiological characteristics in the interaction with human machine interface(HMI) in order to improve the safety and availability of the MMIS of a nuclear power plant(NPP) by reduction of human error. The development of human factors experimental evaluation techniques and integrated test facility(ITF) for the human factors evaluation become an important research field to resolve hi,am factors issues on the design of an advanced control room(ACR). We developed am ITF, which is aimed to experiment with the design of the ACR and the human machine interaction as it relates to the control of NPP. This paper presents the development of an ITF that consists of three rooms such as main test room(MTR), supporting test room(STR) and experiment control room(ECR). And, the ITF has a various facilities such as a human machine simulator(HMS), experimental measurement systems and data analysis and experiment evaluation supporting system(DAEXESS). The HMS consists of full-scope simulation model of Korean standard NPP and advanced HMI based on visual display nits (VDUS) such as touch color CRT, large scale display panel(LSDP), flat panel display unit and so on.

• 콘크리트학회논문집
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• 제19권1호
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• pp.39-46
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• 2007

본 연구에서는 최근 국내에서 신기술 등으로 인증되어 활용되고 있는 보수재료 공법을 적용한 폭로시험체를 제작한 후, 해양환경 및 일반 대기환경 하에서 장기폭로실험에 의한 정량적 폭로실험 데이터를 확보함으로서 향후 성능저하된 철근콘크리트 구조물의 보수재료 공법 성능평가 방법 및 품질관리기준 확립을 위한 기초 자료를 제시하고자 하였다. 해양 및 일반 대기환경 하에서 폭로재령 30개월까지 폭로실험을 실시한 결과 탄산화 및 염화물이온 침투 깊이는 피복두께에 비해 매우 적게 침투하였으며, 철근의 부식 면적과 부식 속도 결과를 토대로 폭로재령 30개월까지 철근 부식의 주된 원인은 내재 염화물량 및 매크로셀에 의한 부식이 가장 큰 원인으로 판단된다. 향후 폭로시험체의 지속적인 평가를 통하여 정량적인 폭로실험 데이터를 확보함으로서 보수재료 공법 성능 평가 방법 및 품질 관리 기준 확립을 위한 기초 자료를 제시할 수 있을 것으로 판단된다.

• 한국유체기계학회 논문집
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• 제3권3호
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• pp.25-30
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• 2000

Thermodynamic method of pump performance measurement calculates pump efficiency and flowrate by measuring fluid temperature increase and pressure rise through the pump. The theory of this method is investigated and precise comparison experiment with classical hydraulic method was conducted to verify the accuracy. Classical hydraulic pump performance measurement results and Yatesmeter results based on the thermodynamic method showed good agreement in measured performance.

• 정보관리학회지
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• 제21권2호
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• pp.189-210
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• 2004

본 연구의 목적은 객체-관계형 데이터베이스 접근에 의한 XML 문헌의 검색 성능을 평가하는 것이다. 본 논문에서는 INEX(Initiative for the Evaluation of XML retrieval)에서의 XML 문헌의 색인 및 검색 방법에 대하여, 그리고 실험 방법론들에 대하여 기술하고 있다. 대부분의 전통적인 정보검색 성능평가 실험에서와 같이 본 연구에서 사용된 테스트 콜렉션(test collection)은 문헌(즉, XML 문헌), 토픽, ad hoc 검색, 적합성 판단, 평가로 이루어졌다. 그리고 ORDBMS 기술들을 기반으로 개발된 전용 XML 데이터베이스의 일종인 EXIMA$^{TM}$ Supply을 사용하여 INEX에서 제공한 대규모 XML 문헌들을 저장하고 검색하였다. 본 논문에서는 실험에서 사용한 시스템에 대한 개략적인 기능들과 색인 및 검색 과정 그리고 INEX 2002에서의 성능평가 결과에 대하여, 앞으로 개선되어야 할 기능에 대하여 논하고 있다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.145-146
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• 2020

This study investigated the performance evaluation of polymer cement mortar for repairing concrete structures using calcium nitrite(Ca(NO₂)₂) and CO₂ nano-bubble mixing water to develop section-restoration methods for the repair and reinforcement of cracks. The evaluation items were strength and microstructure analysis at 28 days of age according to the change in the amount of calcium nitrite and the use of CO₂ nano-bubble water. As a result of the experiment, it was confirmed that the performance of polymer cement mortar for repairing concrete structures was improved by the generation of nitrite-based hydration products when calcium nitrite and CO₂ nano-bubble water were used.

• 대한방사선기술학회지:방사선기술과학
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• 제45권1호
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• pp.1-9
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• 2022

In this study, we proposed an image quality control for an automatic exposure control (AEC) of digital radiographic imaging system and tried to analyze the performance of the AEC by various manufacturer. The subjects of the experiment were analyzed for the AEC image quality evaluation using digital radiation generators from four manufacturer such as PHILIPS, GE Healthcare, SAMSUNG Healthcare, DK Medical Solution. We used as materials for the implementation of the image quality evaluation by coins (500 won, KOMSCO, Korea). This study evaluated the performance evaluation of the AEC as image quality and exposure dose (Milliampere-seconds; mAs). The image quality evaluation was tried visual assessment by two radiologic technologists and contrast to noise (CNR) by ImageJ. The exposure dose investigated mAs on digital radiation generators. The radiographic coin images acquired 360 images based on change in the control factors of the AEC, which were kVp, the consistency of field configuration and dominant zone, sensitivity and density. As a result, there was a significant difference in the AEC performance between manufacturer. The CNR by the AEC for each manufacturer showed a difference of up to about 1.9 times. The exposed tube current by the AEC for each manufacturer showed a difference of up to about 5.8 times. It is expected that our proposed evaluation method using coins could be applied as the AEC performance evaluation method in the future.

• 설비공학논문집
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• 제14권10호
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• pp.781-785
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• 2002

The effects of different surfaces on dry and wet frosting test were experimentally investigated. The results of experiment were compared by the performance evaluation coefficient (PEC). Results showed that the air-side pressure drop of lacquer coated evaporator increased by 5% as compared to the plasma treated one. It was also found that the Plasma coated evaporator is lower than lacquer coated one in the PEC ratio.

• 산업공학
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• 제17권2호
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• pp.226-232
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• 2004

In shipbuilding area, data sharing is one of the crucial issues. Recently, for collaborative design, ship structural CAD systems adopt the database as its primary storage. Database is useful to deal with the large amount of design information among the heterogeneous design department and design stage. To make the database-based CAD system object-oriented database(OODB) and object-relational database(ORDB) can be used. It is important to select proper database because the CAD system performance mainly depends on access performance of database. In this research, using prototype CAD system from other research, access performance of OODB and ORDB form CAD system was evaluated. STEP application protocol was used as the database schema and experiment was made in query by property and query by region. The results give some idea of how to choose the database for CAD systems.

• 한국의류학회지
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• 제26권3_4호
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• pp.412-421
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• 2002

The main purpose of this study was to examine whether there exist physical attractiveness stereotype, ‘what is beautiful is good’on the evaluation of stimulus person’s task performance in present Korea. This study also examine the effects of the appropriateness of the stimulus person’s clothing and subjects’sexes on the task performance evaluation. The index of the physical attractiveness of this study was the facial attractiveness judged by 30 female university students. The appropriateness of clothing was manipulated by 4 types of clothing perceived appropriate for two assumed situations by female university students. Three female faces having high, medium, and low attractiveness were simulated with the same body dressed four types of clothing using CAD system, and a total of 12 stimulus persons were created. A total of 524 male and female(262 of male, 262 of female) university students from 3 universities in Kwangju, Korea were participated as subjects in this study. The design for the experiment was a $3\;{\times}\;4\;{\times}\;2$ randomaized factorial, with three levels of facial attractiveness (high, medium, low), and four types attire(formal-masculine, formal-feminine, casual-masculine, casual-feminine), two kinds of context (job interview, dating) in which perceptions were occurred. The data were analysed using MANOVA, Duncan test and F-test. The results were as fellows: 1. The stimulus person’s facial attractiveness exerted significant positive effects on the evaluation of task performance in both of two assumed situations (p<.001, respectively). 2. The appropriateness of stimulus person’s clothing did not influence on the task evaluation in both of two assumed situations. 3. The gender of subjects did not influenced the task performance evaluation in both of two assumed situations.

• 한국의류산업학회지
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• 제12권6호
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• pp.843-850
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• 2010

To evaluate the heating performance of commercial heated vests, we investigated the thermal images and the temperature between body and vest for three heated vests. We captured infrared thermography by FT-IR Spectrometer to analyzed the heating temperature of the heating elements taken from the vests, and the maximum heating temperature of the vests was compared with thermal image in the room temperature($18^{\circ}C$). In outdoor experiment($-4.7^{\circ}C$), we measured the inner temperature as well as the thermal image of heated vests. Four healthy men participated in this experiment, and the ANOVA and Duncan test was performed for statistical analysis. As the results, the heating temperature range of the heated vests used in this experiment was $32{\sim}42^{\circ}C$, much lower than the displayed temperature range in their specifications, so the exact specification for heating performance of heated clothing was required. In comparisons of the heating performance among the heated vests, we found out that the insulation of clothing is very important to design the heated clothing, because the inner temperature of the vest had good insulation by itself was higher than that of the vest shown higher temperature over $7^{\circ}$ than another vests at the heating temperature.