• 한국정보통신설비학회:학술대회논문집
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• 2005.08a
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• pp.42-47
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• 2005

FTTH 가입자망 구축을 하기 위해 기존 시가지나 주택지역에 있는 통신 관로 시설을 분석한 바에 의하면 그 사용률이 약 71%에 이르고 있는 실정이며, 시설도 낙후되어 실제로 현장에서 사용하고자 하면 바로 사용할 수 없는 시설들이 상당히 존재하고 있다. 이를 위해서 본 연구에서는 FTTH을 구축하기 위한 통신기초시설의 수요를 사전에 예측하여 효율적이고 경제적인 투자방향을 모색해 보았다.

• 한국정보통신설비학회:학술대회논문집
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• 2005.08a
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• pp.38-41
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• 2005

현재 국내외적으로 PON 방식의 FTTH망 구축이 본격적으로 시작되고 있는 상황으로 향후 PON망 광선로의 운용/유지보수 문제가 대두될 것으로 보인다. 본 고에서는 FTTH망 구축 방식의 하나인 스플리터를 사용한 E-PON망 광선로의 감시를 위한 고분해능 OTDR 기술과 그 응용에 대해 다루었다.

• Hwankyungkyoyuk
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• v.20 no.4
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• pp.65-83
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• 2007

The purpose of this study was to survey science teachers, perception and attitudes on disposal of school laboratory waste water and materials. To fulfill this aim, a questionnaire was administered to 244 secondary school science teachers. The result of this study revealed that there was no large disparity in the degree of understanding of laboratory waste disposal and the laboratory waste water treatment, and in secondary science teachers' perception and practicing attitude on the environment. While science teachers had deep understanding of laboratory waste disposal and its influence on environmental pollution, they expressed less positive attitude toward the actual disposal of waste materials and waste water, and participation in teacher training. Therefore, it is necessary to provide standards of systematized disposal methods and proper disposal facilities in middle and high school laboratories, as well as to investigate teachers' needs before providing teacher training program.

• 한국정보통신설비학회:학술대회논문집
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• 2006.08a
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• pp.117-121
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• 2006

가입자망 구간에서의 최종적인 목표라 할수있는 FTTH를 실현시키기 위해서 다양한 FTTH 가입자 전송장비가 개발되고 있으며, IP-TV 서비스를 비롯한 시간이동방송과 네트웍기반의 예약녹화기능 등 IP기반의 여러가지 영상서비스 개발이 상용화 단계에 있지만 이러한 서비스를 수용하기 위해 서는 가입자 댁내까지 광케이블이 인입되어야 한다. 본 논문에서는 가입자 댁내까지 광케이블을 인입시키기 위해 건축된지 오래 경과되고 구내 통신설비환경이 열악한 기존공동주택(아파트)을 대상으로 광케이블을 댁내로 인입시키기 위한 방법과 시험 구축한 결과에 대하여 언급하였다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.32 no.4
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• pp.153-160
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• 2009

In the research-oriented university there are various laboratories in the departments according to a major field of study. Under these circumstances the budget to purchase experimental facilities has only to be distributed among research teams and then is spent within the confines of it without rein. However, in case of college the budget for experimental facilities needs to be considered other allocation methods because of no laboratory being managed by professor. In this paper the methodology for the rational selection of experimental facilities for college is proposed. It is composed of the following ; (1) the rational allocation method of the budget for experimental facilities in consideration of the characteristics of individual departments, and (2) the evaluation and selection of the alternative experimental facilities submitting in each department. To decide rationally importance of estimation index for the determination of budget and equipment is applied the Analytic Hierarchy Process(AHP) technique. First the proposed methods are presented and then discussed with simulation results.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.7 no.4
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• pp.243-253
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• 2009

In this study, research status on radionuclide and colloid migration in underground research facilities including KURT (KAERI Underground Research Tunnel) was investigated. Some foreign underground research facilities constructed in crystalline rock formations such as granite were briefly introduced and compared. International joint researches concerned with the radionuclide and colloid migration were investigated particularly for the Grimsel Test Site (GTS) and $\ddot{A}$sp$\ddot{o}$ Hard Rock Laboratory by analyzing major research items, on-going research projects, and future plans.

• Journal of the Korean Institute of Gas
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• v.19 no.6
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• pp.92-98
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• 2015

Toxic gases are managed by High Pressure Gas Safety Control Act. Toxic Gases are "31 designated species and each gas of which the permissible concentration($LC_{50}$) is equal to or less than 5000 ppm as defined in High Pressure Gas Safety Control Act.". Korean toxic gas usage in accordance with the growth of the electronic industry has increased explosively. The demand of toxic gas research in domestic university laboratories has grown together. But the research associated with toxic gas safety management in the domestic laboratory is nonexistent state. In this study, we identified weak points of toxic gas safety management through a survey of domestic university laboratory facilities. This paper presented toxic gas safety measures in order to overcome those weak points. Also this paper developed a standard checklist to improve and ensure safe management of toxic gas facility in accordance with the proposed measures. This research is to enforce safety management of toxic gas facilities in domestic university laboratory and it will provide safety guidelines for every laboratory.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.05a
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• pp.268-273
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• 2004

A study on experimental method of the model test for the impulse turbine is carried out. the wave simulator is used to reproduce the real wave condition. It controls two parameter correspond to wave height and wave frequency. The optimum design which is reported by T. Setoguchi is manufactured and tested for the validation of our test facilities. The comparison of model test show that our facilities produce little bit higher efficiency at maximum efficiency point. To increase the efficiency of turbine, the new rotor with negative tip clearance is designed and being tested.

• Journal of the Korean Institute of Educational Facilities
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• v.4 no.3
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• pp.31-39
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• 1997

The purpose of this study was to improve the lighting environment of the VDT workspaces in computer laboratory. This study was carried out through the field measurements on the computer laboratory and a survey using the questionnaire about the VDT workspaces. The major findings of the study were as follows: (1) It was unbalanced among the illumination, luminance, and color distributions in the the VDT workspaces. (2) The difference of brightness between the CRT screen and its surroundings have presented on the whole unbalanced. (3) It was proved that the artificial light source of the ceiling lighting should use the parabolic louver luminaire limiting the radiant luminance.

• International Journal of Safety
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• v.6 no.2
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• pp.33-37
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• 2007

In recent days, the accidents have happened at experimental laboratories in universities or institutes. In order to improve safety assurance of workers in laboratories, it is required to carry out systematic study concerned with evaluation of safety and health level. The safety and health inspection checklists were developed and conducted the case study. The case study was carried out laboratory safety inspection with 5 inspectors by the checklists to become aware of safety and health level. From the evaluation results of the inspection, we could be made quantification of laboratory through evaluation of safety and health level in laboratory. It was found that was recognized present states of the laboratory and established a plan for improvements in laboratory safety facilities from the case study. The safety inspection checklists can be used as basic data to establish evaluation criteria of safety and health level.