• 전기의세계
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• 제24권5호
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• pp.21-30
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• 1975

These studies aim to support technically the National Rural Electrification Program now in progress by analyzing several engineering problems in regard to the program and then suggesting some appropriate solutions or measures. The contents of these studies are divided into three categories; (1)optimized distribution systems for the rural electrification, (2)optimized rural illumination and (3)single-phase operation of three-phase motors.

• 한국해양공학회지
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• 제37권6호
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• pp.282-282
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• 2023

• 한국유기농업학회지
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• 제11권1호
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• pp.1-19
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• 2003

Nowadays liquid manure can no longer be regarded as a waste product, but as a compound fertilizer, which should be used as efficiently as possible, especially on the farm. Additionally, there is the intensified public discussion about environmental issues. With respect to the ecological effects of the proper application of liquid manure, administrative regulations in the form of guidelines, decrees and ordinances have been established in region. It is questionable though, if such quantifying restrictions bring a reduction of ground water pollution, or if not through these measures new problems will be created, i. e. be temporarily postponed. Moreover, in this Study, possible Operation and technical Improvement are presented.

• 산업융합연구
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• 제18권5호
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• pp.14-22
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• 2020

본 연구에서는 조직혁신과 마케팅혁신 같은 비 기술혁신 활동 이외에 전유성은 어떠한 메커니즘을 가지고 기업의 경영성과에 영향을 미치는지에 대해서 실증분석을 통해 검증하고자 하였다. 이에 과학기술정책연구원(STEPI)에서 실시한 '2018년 한국기업혁신조사: 제조업부분'으로부터 자료를 수집하여 분석 데이터로 활용하였고 회귀분석을 통해 가설을 검증한 결과 비 기술혁신은 경영성과를 향상시키고, 전유성은 비 기술혁신에 영향을 받으며, 경영성과 사이에 매개 요인으로 작용함을 실증분석을 통해 검증하였다. 이러한 것을 통해 최근 연구되고 있는 비 기술혁신에 대하여 비 기술혁신과 함께 전유성을 고려하는 것이 의미 있는 연구가 될 수 있음을 도출하였고, 실무적 시사점으로는 전유성의 확보가 기업의 경영성과를 결정하는 중요한 요인이기에 기업에서는 전유성 확보를 위한 전략적 통찰이 필요하다. 한계점으로는 비 기술혁신과 전유성의 매개효과를 가지는 것을 검증하는 연구로 제한하였으며, 추후 연구에는 보다 다양한 검증 방법을 통해 기업의 경영성과에 미치는 연구로 발전해 나가는 것도 가능할 것으로 판단된다.

• 한국전자통신학회논문지
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• 제8권12호
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• pp.1825-1832
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• 2013

현재 국내에서 DTV 전환 이후 지상파 다채널 서비스 도입에 대한 필요성이 제기되면서 다채널 서비스 도입을 위한 정책을 추진하고 있다. 이에 따라 지상파 방송사들은 지상파 다채널 서비스 실현을 위해서 공동대응책을 마련하고 있다. 아울러 규제기관인 방송통신위원회 역시 지상파 다채널 서비스 정책 수립에 적극적인 입장이며, 지상파 방송사들과 함께 실험방송을 준비하고 있다. 이에 본 글은 지상파 다채널 서비스에서 제기되는 기술적 문제와 서비스 구현을 위한 정책적 방안을 살펴봄으로써 향후 지상파 다채널 서비스가 추구해야 할 방향과 규제기관의 정책수립에 도움이 되고자 한다.

• 한국통신학회논문지
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• 제38B권10호
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• pp.775-784
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• 2013

이동통신 사업자들은 자신의 망 총소유비용을 줄이면서 데이터 폭증에 대처하기 위한 다양한 기술적인 대책 들을 강구하고 있다. 이 논문에서는 그러한 기술적인 대책의 하나로써 클라우드 기지국이란 새로운 기지국 구조에서 조정 다중점 송수신 운용에 따른 시스템 용량 및 이동성 성능에 관련된 모의실험 결과를 도출한다. 그 결과는 조정 다중점 송수신이 적용되는 클라우드 기지국의 규모 및 적용 영역에 따라 시스템 용량 및 이동성 성능도 개선될 수 있다는 것을 관찰할 수 있었으며 이러한 상호 인과 관계들은 실제 이동통신 사업자의 망 운용에 있어서 하나의 실용적 지침을 제공할 수 있다.

• 한국BIM학회 논문집
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• 제10권4호
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• pp.70-80
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• 2020

In the MEP(Mechanical Electrical and Plumbing) field, the utilization of BIM-based drawings is lower than in the architectural and structural sectors, and the limited BIM collaboration problem caused by different levels of BIM utilization in each field is becoming a serious problem in adoption and utilizing BIM. Therefore, this study analyzed the current status of BIM application in the field of mechanical equipment in the construction industry and analyzed the practical problems and limitations of adoption and utilizing BIM from a corporate perspective based on Delphi analysis techniques. Based on the results of the analysis, the limitations of the current MEP BIM application were classified into economic, technical, institutional, and social factors to derive detailed items, and, accordingly, the improvement measures were classified as institutional, policy, and technical measures. As a result, the company intends to maximize the value of BIM utilization in the MEP field by presenting improvement plans to activate BIM in the field of mechanical equipment based on the opinions of the company, thereby laying the foundation for BIM in the construction industry by creating a collaborative BIM environment for each sector in the domestic construction industry.

• 한국안전학회지
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• 제37권4호
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• pp.63-72
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• 2022

The number of deaths caused by power crane accidents continues to decline. Nevertheless, more than 50 people die each year due to these accidents. Various types of slings, such as wire rope sling, chain sling, belt sling, and grommet, are used in industries, depending on the characteristics of the work involved. To reduce the number of accidents involving these slings, the formulation of technical measures and education of workers are necessary. This study compares and analyzes local and international guidelines as well as those found in manufacturer manuals in relation to grommets, which are widely used in shipyards and construction sites. Moreover, measures for improving the safety of work using grommet are reviewed. This paper further proposes the revision of the technical guidelines of the Korea Occupational Safety and Health Agency such that the information directly affecting the safety of work involving grommets is included. By clarifying the guidelines that manufacturers provide in their manuals, accident prevention through worker awareness is anticipated in the future.

• 해양환경안전학회지
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• 제30권3호
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• pp.263-274
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• 2024

The digitization of ship environments has increased the risk of cyberattacks on ships. The smartization and automation of ships are also likely to result in cyber threats. The International Maritime Organization (IMO) has discussed the establishment of regulations at the autonomous level and has revised existing agreements by dividing autonomous ships into four stages, where stages 1 and 2 are for sailors who are boarding ships while stages 3 and 4 are for those not boarding ships. In this study, the level of a smart ship was classified into LEVELs (LVs) 1 to 3 based on the autonomous levels specified by the IMO. Furthermore, a risk assessment for smart ships at various LVs in different risk scenarios was conducted The cyber threats and vulnerabilities of smart ships were analyzed by dividing them into administrative, physical, and technical security; and mitigation measures for each security area were derived. A total of 22 cyber threats were identified for the cyber asset (target system). We inferred that the higher the level of a smart ship, the greater the hyper connectivity and the remote access to operational technology systems; consequently, the greater the attack surface. Therefore, it is necessary to apply mitigation measures using technical security controls in environments with high-level smart ships.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 춘계학술대회논문집
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• pp.385-390
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• 2005

This paper provided a counter measures against the troubles and accidents that are likely to take place in the power plant using hydrogen gas as a coolant for the cooling system of the generator. Because of the extremely wide flammability limits of hydrogen in comparison to the other flammable gases, the safety measures against the hydrogen accidents is very important to ensure the normal operation of electric-power facility. This study's purpose was a presentation of standard model of safety management of hydrogen equipments in the coal firing power plant such as following items: 1) providing the technical prevention manual of the hydrogen explosions and hydrogen fires occurring in the cooling system of power generator; 2) the selection of explosion-proof equipments in terms of the risk level of operating environment; 3) the establishment of regulations and counter measures, such as the incorporation of gas leakage alarm device, for preventing the accidents from arising; 4) the establishment of safety management system to ensure the normal operation of the power plant.