• 대한핵의학회:학술대회논문집
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• 대한핵의학회 1998년도 제37차 추계학술대회
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• pp.461-462
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• 1998

• 전기학회논문지
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• 제65권5호
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• pp.836-842
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• 2016

When an accident occurs in the nuclear power plant, the faulted information might mislead to the high possibility of aggravating the accident. At the Fukushima accident, the operators misunderstood that there was no core exposure despite in the processing of core damage, because the instrument information of the reactor water level was provided to the operators optimistically other than the actual situation. Thus, this misunderstanding actually caused to much confusions on the rapid countermeasure on the accident, and then resulted in multiplying the accident propagation. It is necessary to be equipped with the function that informs operators the status of instrument integrity in real time. If plant operators verify that the instruments are working properly during accident conditions, they are able to make a decision more safely. In this study, we have performed various tests for the fault detection sensitivity of an data-driven empirical model to review the usability of the model in the accident conditions. The test was performed by using simulation data from the compact nuclear simulator that is numerically simulated to PWR type nuclear power plant. As a result of the test, the proposed model has shown good performance for detecting the specified instrument faults during normal plant conditions. Although the instrument fault detection sensitivity during plant accident conditions is lower than that during normal condition, the data-drive empirical model can be detected an instrument fault during early stage of plant accidents.

• 산업기술연구
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• 제19권
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• pp.321-329
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• 1999

An automated manufacturing process mechanism for string musical instruments has been designed in this study. In contrast to other manufacturing products, classical string instruments try to preserve their traditional design shapes even in these days and involve variety of wood working(carpentry) characteristics including highly skilled curved surfaces treatments. Great efforts have been put to develop an integrated and automated system for improved product quality and process control, reduced physical labors, better safety etc. They, however, have been limited to devise jigs and tools with regard to selected processes due to lack of technology and research man-powers. We carefully examined the products and process characteristics, and an automated mechanism which overcome prevailing drawbacks has been derived.

• 한국통신학회논문지
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• 제17권12호
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• pp.1423-1436
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• 1992

이 논문에서는 멀티태스킹을 지원하는 CAT인터페이스를 구현하였다. 컴퓨터와 계측기를 연결하기 위해 인터페이스 카드를 제작하고 구현하였다. OOP와 CUI를 사용한 컨트롤과 디스플레이는 C++로 프로그램되었다. 스펙트럼 분석기와 전력계가 제어할 계측기로 선택되었다. 9개의 모듈이 여러가지 자원을 공유하도록 구성되었다. 또한, 여러대의 계측기를 동시에 측정하기 위해 멀티태스킹이 구현되었다. 멀티태스킹은 시간분할 DOS환경에서 수행되었다. 멀티태스킹은 프로세싱 기법으로 트레드 방식을 사용하였고 스케줄링으로 라운드 로빈방식을 사용하였다. 다른 목적계측기를 위해서는 목적 계측을 구동할 소프트웨어만 합하면, 시스템은 더 많은 계측기를 컴퓨터에 의해 동시 측정할 수 있다. 사용자는 전문가적인 지식없이 시간과 오차를 줄일 수 있다.

• 지역사회간호학회지
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• 제11권2호
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• pp.389-398
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• 2000

The work of visiting nursing personnel consists mostly of direct nursing and it is absolutely necessary that training of the nursing personnel for infection control be emphasized because most of patients are composed of elderly people with chronic diseases and malnutrition who are highly susceptible to infection. Accordingly. this study was designed to provide basic data for the development of an infection control program in public health centers as well as the promotion of perception and performance of infection control by analysing the perception of importance and performance in the infection control of visiting nursing personnel who carry out visiting nursing services. The subjects of this study consisted of a number of visiting nursing personnel working for 15 public health centers. 15 health-center branches. and 16 health clinics. The collection of data was grounded on a questionnaire method. The questionnaire breaks down to 8 questions about general characteristics and 108 questions in connection with the perception and performance of infection control. The results of this study are as follows: 1. 82 subjects (78.1%) responded that it is necessary to control infection. 79 subjects(75.3%) responded that education is necessary for infection control. 50 respondents (47.6%) answered in the affirmative in regard to the role of infection carriers. 2. The mean score for the perception of importance in infection control was 4.55 and that performance accounts for 4.03. this turns out to be very high. 3. In terms of the perception of importance per each field of infection control. medication. the management of contamination and sterilization, the control of environments and instruments. washing hands and individual hygiene as well as the prevention of cross-infection and the supervision of infection stand at 4.72. 4.64. 4.60. 4.58. 4.52 and 4.21 respectively. In terms of performance. the supervision of infection. the control of environments and instruments, individual hygiene and the prevention of cross infection. medication. washing hands, and the management of contamination and sterilization was 4.21. 4.12. 4.10. 4.03. 3.91 and 3.81 respectively. 4. In terms of the correlation between the perception of importance and the performance of infection control. the score stands high in all fields: this means the high perception of importance leads to high performance statistically (P< .05). 5. In terms of the perception of importance in general characteristics. there is no significant difference while the form of working places. working career and the career as visiting nursing personnel show a significant difference in terms of performance(P< .05). From the results. it is suggested that the visiting nursing personnel should be constantly educated with the aid of the development of infection control programs and that instructions and instruments for the management of infection should be worked out so as to enhance the performance of infection control on the part of nurses in applicable communities.

• Restorative Dentistry and Endodontics
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• 제45권3호
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• pp.38.1-38.10
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• 2020

Objectives: This study aimed to evaluate vital pulp tissue removal from different endodontic instrumentation systems from root canal apical third in vivo. Materials and Methods: Thirty mandibular molars were selected and randomly divided into 2 test groups and one control group. Inclusion criteria were a positive response to cold sensibility test, curvature angle between 10 and 20 degrees, and curvature radius lower than 10 mm. Root canals prepared with Hero 642 system (size 45/0.02) (n = 10) and Reciproc R40 (size 40/0.06) (n = 10) and control (n = 10) without instrumentation. Canals were irrigated only with saline solution during root canal preparation. The apical third was evaluated considering the touched/untouched perimeter and area to evaluate the efficacy of root canal wall debridement. Statistical analysis used t-test for comparisons. Results: Untouched root canal at cross-section perimeter, the Hero 642 system showed 41.44% ± 5.62% and Reciproc R40 58.67% ± 12.39% without contact with instruments. Regarding the untouched area, Hero 642 system showed 22.78% ± 6.42% and Reciproc R40 34.35% ± 8.52%. Neither instrument achieved complete cross-sectional root canal debridement. Hero 642 system rotary taper 0.02 instruments achieved significant greater wall contact perimeter and area compared to reciprocate the Reciproc R40 taper 0.06 instrument. Conclusions: Hero 642 achieved higher wall contact perimeter and area but, regardless of instrument size and taper, vital pulp during in vivo instrumentation is not entirely removed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2603-2605
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• 2001

In this paper, we introduce the concept and construction of a web-based bidirectional remote laboratory system. In this configuration, students build and test circuits using internet at home, and the circuit components and experimental equipments at the school are interconnected following student's design. This means that it is possible to choose components, build circuits, connect experiment equipments, control the equipment. and receive measurement results at home in real-time. Labview and Java are used to control this system efficiently and to provide user-friendly environments. Computer-based function generator, DMM, and oscilloscope are used and switch module is used to change interconnections. It was found that a system adopting computer-based instruments, which include PXI/CompactPCI modules and PC plug-in board, provide better performance than that adopting stand-alone instruments connected with GPIB. It is believed that, if this system is installed, the real experiments, not the virtual experiments based on simulation, can be done at home effectively, resulting in revolutional change in engineering education.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국제학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.891-895
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• 1988

We discuss what kind of scale is suitable for analog signal recording paper from the viewpoint of human engineering. We show a method for automatically generating a suitable scale from the higher and lower limits of the recording range.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국제학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.928-933
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• 1988

Control technology has been making remarkable progress in electrical control (E), instrumentation & control (I) and computer control (C) field respectively. In order to rationalize system engineering and simplify system configuration and operation work, so called, EIC are now to be integrated into one system. FUJI has developed it's own E, I&C integrated system, to meet above mentioned market requirements of variety. This paper describes basic concept of FUJI's Integrated Man-Machine Interface, hereinafter called SINGLE CONSOLE, from some view points of E, I, C integration technology.

• 한국멀티미디어학회논문지
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• 제17권6호
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• pp.687-696
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• 2014

An integrated ship area network has functionality of remote control and autonomous management of various sensors and instruments embedded or boarded in a ship. For such environment, an wireless bridge is essential to transmit control and/or managing information to sensors or instruments from a central integrated ship area network station. In this paper, one of reliable schemes of WiMedia based wireless bridge using relay cooperative transmission using WiMedia distributed MAC protocol is proposed to increase a communication reliability between cluster headers, irrespective of channel variation. Simulation results show that the proposed wireless bridge using relay cooperative transmission scheme increases communication reliability.