• Journal of the Korean Society of Safety
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• v.23 no.3
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• pp.1-7
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• 2008

As a clean fuel, LNG or LPG is widely used in large restaurants or plants instead of coal. These fuels are easy to use and cheap. However, they are inflammable very much and easily exploded at the worst. So there are many laws and regulations legislated for the handling and usage of the gas facilities. Nevertheless, very harsh explosions occurred in several domestic or foreign places. In this paper a gas detection and alarm system was developed for large facilities. A new concept for connecting many gas detectors was proposed and based upon that a system including hardware and software have been developed and tested. Although up to 16 gas detectors apart 1 km from main controller can be connected currently, this system can be easily expanded for more detectors because each gas detector receiver communicates with main controller using industrial standard RS-485 multi drop technique. Furthermore several additive functions was included for the installation and maintenance convenience.

• Aerospace Engineering and Technology
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• v.7 no.2
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• pp.196-204
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• 2008

Modem rotorcraft is required to have the capability to operate in all-weather conditions. Also icing condition is important issue to aircraft safety and certification. And rotorcraft icing research has come a long way during the past few decades. The aircraft icing is the most difficult to handle. So, icing-related accidents, incidents and operating problems still occur regularly in service, despite improvements in design and test techniques. By reviewing icing certification requirement of FAR(Federal Aviation Regulations) and KAS(Korean Airworthiness Standard), this paper describes methods how to demonstrate safety in the flight and consideration of icing when rotorcraft is required TC(Type Certification).

• Journal of the Korean Society for Aviation and Aeronautics
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• v.19 no.2
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• pp.45-51
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• 2011

The article specified in aviation legislation, 'The captain has the final authority and responsibility in flight safety' could be one reason running counter to applying "Vertrauensgrundsatz". In practice, however, captains do not have professional skills in every task and they should distribute duties and responsibilities to flight attendents and other staffs to operate the flight as safely and efficiently as possible. Therefore, in aviation, fair criterion, namely, "Vertrauensgrundsatz" is necessary to balance between efficiency and legal interest for participants. In addition, when it comes to mutual trust of duty which was the starting point of this study, the standard in mutual advice or interference must be based on the duty specified in air law and flight regulations. Also, pervasive trust will not only be attributed to joint responsibility but an act that cannot be trusted.

• Journal of Korean Society for Quality Management
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• v.27 no.3
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• pp.170-188
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• 1999

In all activities of companies, manufacturing processes are one of those which have the worst effect on our environment. So manufacturing companies have taken the necessary steps to comply with environmental regulations. But, most of them focused on the environmental standard control equipments, using ‘end-of-pipe techniques’ that can obtain the desired reductions in a short time-period. But these methods are essentially symptomatic treatments and are not enough for sustainable development. 3M's solution is the ‘cleaner techniques’which emphasize prevention rather than corrective control. This paper examines the concept of cleaner techniques and the environmental management system of 3M - how to conduct technological innovation to prevent generation of pollution and waste at the source under the 3P program.

• IE interfaces
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• v.16 no.3
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• pp.291-299
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• 2003

The managerial environment of automobile industry has been rapidly changing, mainly with the tighter standard of legal and environmental regulations, the pressure of cost reduction from the end-user, the various functional improvements of vehicles, and the globalization management. In order to survive in this complicate circumstances, the automakers have strongly pursued the mutual collaboration with the suppliers, especially tier-1, for the optimal selection of parts/materials and the assembly manufacturing processes of the new model development. They prepare the early involvement program for the suppliers during the conceptual design stage, and implement the win-win strategy of technology development activity, in order to improve the value creation. This study considers the strategic technology management of automotive steel sheets makers on the aspects of strategy, processes, human & physical resources, and organization structure. It also suggests the corporate strategies of steel mills, in order to obtain the technology competence.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.25 no.3
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• pp.135-142
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• 2017

As PED(Personal Electronic Device) market has been rapidly grown, the demand on Lithium battery, which is most commonly used power source of PED, also has been increased. Dew to this trend, the amount of Lithium battery air transportation is also increasing. However, it should be treated very carefully because Lithium is one of very explosive metal. So ICAO, IATA and civil aviation agencies try to enhance the safety of Lithium battery air transportation by aircraft certification and operating regulations. To enhance in-flight safety, the aircraft for transporting Lithium battery should equip certified fire extinguishing system. But recent studies find that Halon, currently used extinguishing agent, is not effective on extinguishing Lithium battery fire. Besides, there is no certified Halon replacement for air use and no acceptable specific minimum performance standard(MPS) for Lithium battery fire. For this issue, a study on characteristics and establishing MPS of Lithium battery fire is needed for safe air transportation of Lithium battery.

• Proceedings of the Safety Management and Science Conference
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• 2009.04a
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• pp.213-224
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• 2009

The present management of the domestic and international advanced enterprises is transferring the systems and the regulations to the prevention system management. Expecially, KOSHA (Korea Occupational Safety & Health Agency) in Korea has supported to set up the OSHMS (Occupational Safety & Health Management System) by KOSHA 18001 since 1997. But small & medium enterprises (SMS) has many difficulties to set up the OSHMS system because of limited natural and human resources. In this study, the rating system as a judgment method of an OSHMS based on the certification standard of the OSHMS was suggested for SMS to adopt voluntarily the OSHMS, certify KOSHA 18001, and improve the safety and health level.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.141-144
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• 2006

In this study, evaluation of physical and chemical properties of crushed sand was performed to establish optimal mix proportion standard for concrete using crushed sand afterward. Most of properties of crushed sand were satisfied with KS F 2527. Especially, chemical stabilities such as alkali-aggregate reaction were fairly good. However, considerable attention would be required in using crushed sand from lime stone judging from the result that weight loss of it was more than 23.8%. There were some differences in the properties with production region, stone type and capacity of facility, therefore it is thought that quality should be controled by optimal regulations for corresponding items.

• Electronics and Telecommunications Trends
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• v.9 no.4
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• pp.113-129
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• 1994

우리나라에서는 전파법 시행령 제56조의 2항과 무선 설비 규격 제4절 및 관련 고시를 통하여 소출력 무선 설비들을 규정하고 있으나 대상 설비 중 극히 일부분만 세부적인 기술 기준이 설정되어 있는 실정이다. 따라서 이러한 소출력 무선기기 상호간의 혼신이나 타 기기와의 간섭으로 인하여 전파 질서의 안정에 위협받을 가능성이 있다. 본 고에서는 이와 같은 문제를 최소화하기 위해 미국의 소출력 무선기기에 대한 제도 및 표준 규격을 조사 조사분석하여 우리나라와 비교함으로써 국내 무선기기 관련 제도의 체계적 정립과 소출력 무선 설비의 형식 검정을 위한 표준 측정법의 정립에 기여하고자 한다.

• Asian-Australasian Journal of Animal Sciences
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• v.16 no.12
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• pp.1795-1798
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• 2003

Fecal malodor is an acute environmental issue to be solved for the intensive animal agriculture in Japan. Among these substances volatile sulfur such as hydrogen sulfide (HS), methanethiol, and dimethyl sulfide, and dimethyl disulfide are the ones most strictly controlled in the Japanese national regulations. In this experiment, we have screened a range of standard strains of chemoheterotrophic bacteria and of the presently isolated soil bacteria for their capacity to decompose HS. We have demonstrated that Comamonas testosteroni $JCM5832^T$ and our isolate Bacillus sp. had a potential to reduce malodor when applied to the pig feces.