• Superconductivity and Cryogenics
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• v.24 no.1
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• pp.16-20
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• 2022

• Journal of Radiation Industry
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• v.6 no.4
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• pp.289-297
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• 2012

Since Nafion is very expensive and shows the decreased fuel cell performance over $80^{\circ}C$ operating temperature, much work has been carried out in the search for cheaper membrane with high fuel cell performance. Radiation is known to be very useful for the preparation of the polymer electrolyte membranes since it can be effectively used for the introduction of ion conducting functional groups into the commercial film with high mechanical and chemical properties. Here, we summarize the our recent progress in the development of fuel cell membranes by utilizing radiation.

• Journal of Radiation Industry
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• v.7 no.2_3
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• pp.177-182
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• 2013

This study was conducted to evaluate the effect of gamma irradiation on the microbial populations of dried raw materials (9 products) and Saengsik powder. The samples were gammairradiated at doses of 2, 4, 6 and 8 kGy and the microbiological populations were evaluated. The total numbers of bacteria and Bacillus cereus in non-irradiated dried-raw materials for Saengsik powder was 1.3~3.4 and $1.7{\sim}2.4log\;CFU\;g^{-1}$. However, gamma irradiation reduced the microbiological populations in all samples, and Saengsik powder were sterilized at more than 6 kGy. Moreover, Clostridium perfringens were not observed in all samples within detection limit (<$1log\;CFU\;g^{-1}$). Therefore, the results of this study suggest that gamma irradiation at 6 kGy is sufficient to sterilize Saengsik powder, and thus, irradiated Saengsik powder at 6 kGy fulfills the microbiological requirements for sterilized food.

• Journal of Radiation Industry
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• v.7 no.2_3
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• pp.93-99
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• 2013

This study was conducted to evaluate the effect of gamma irradiation on the microbiological and sensory characteristics of frozen Bibimbap. Frozen Bibimbap vegetables were contaminated by microbial levels of $2.70{\sim}6.67log\;CFU\;g^{-1}$ in total aerobic bacteria. Frozen Bibimbap was contaminated by microbial levels of $4.8log\;CFU\;g^{-1}$ in total aerobic bacteria, but microorganisms in gamma-irradiated samples at above 25 kGy were not found at detection limit less then $1log\;CFUg^{-1}$. Sensory characteristics of the gamma-irradiated Bibimbap were decreased depending upon the irradiation dose, and sensory scores of the samples irradiated with doses higher than 10 kGy were significantly decreased. Therefore, the application of combination of the various food processing technology should be considered for the sterilization of Bibimbap, without any deterioration of quality occurred by high dose irradiation.

• Proceedings of the Safety Management and Science Conference
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• 2005.11a
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• pp.74-82
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• 2005

안전사고 원인에 대하여 Near-Miss Report 분석을 근거로 하여, 재해원인에 대하여 접근해 보고, 이 Data를 참고로 첨단산업에서의 재해 유형을 분석해보고, 유형에 따른 기여인자를 기존 Human-ware, Hard-ware, System-ware를 구성요소로 해서 첨단산업에서의 각각의 수행인자의 비율 분석을 통한 판단한 결과는 Human-ware와 Hard-ware 비율은 4:1로 나타났고, 첨단사업장에서의 5년간의 사고건수를 근거로 원인에 대한 수행인자의 ANOVA로 분석하여 4개인자에 대한 분산 분석을 도출하였고 이에따른 Loss와 Time과 Accident 관계와 Effect of Intervention관계와 Reason's Accident Causation Model과 Perrow's Normal Accident Theory Model를 연관시켜서 첨단산업에서의 사고이론 Model를 추출해서 첨단산업에서의 안전사고에 대한 유형을 분석해서 사고를 사전에 제거키 위한 새로운 모델을 제시하고자 한다.

• Proceedings of the KOR-KST Conference
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• 1998.10b
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• pp.506-506
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• 1998

지능형 교통시스템(ITS: Intelligent Transport Systems)의 부체계인 첨단화물운송시스템(CVOs: Commercial Vehicle Operations)은 교통혼잡 완화와 물류비 목적으로 종합물류정보전산망 사업에서도 추진되어 왔다. ITS 기본계획에서 정의한 화물 및 화물차량관리시스템과 위험물 차량관리시스템의 세부서비스는 '97년말 종합물류정보전산망 상세설계와 첨단화물운송시스템 기본설계 과정에서 새롭게 정립, 제시되었다. 본 고에서는 첨단화물운송시스템의 서비스와 소요기술 개발현황을 기존의 지능형 교통시스템과 종합물류정보망의 추진계획, 업계의 관련자료를 바탕으로 비교적 상세하게 검토하고, 현재까지 공공과 민간에서 개발, 적용되고 있는 시범서비스 차원의 첨단화물운송시스템의 소요기술 적용사례와 효과를 분석하고자 하였다. 본 고에서 첨단화물운송시스템의 적용사례로서 해양수산부를 중심으로 현재 구축 운영중인 컨테이너터미널 전자문서교환(EDI: Electronic Data Interchange) 및 GATE 자동화시스템과 '97년 7월부터 본격 가동에 들어간 현대물류 택배종합전산시스템(HYDEX)의 정보서비스와 관련한 요소기술과 함께 그 효과를 살펴보고, '96년 12월부터 시범서비스를 제공중인 한국통신의 화물운송정보시스템의 적용효과를 분석하였다.

• The tire
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• s.180
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• pp.3-9
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• 1995

이 자료는 '94. 12 산업연구원 연구보고서 「2000년대 첨단기술산업의 비전과 발전과제」라는 책자에 수록되어 있는 것중 제3편 '첨단 타이어산업' 부분으로서 앞으로 2회에 걸쳐 연재하고자 한다.

• Journal of Radiation Industry
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• v.6 no.2
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• pp.119-123
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• 2012

The detection properties of gamma-irradiated (0~10 kGy) dried seaweed, dried shrimp, and seasoned dried filefish were investigated by photo-stimulated luminescence (PSL) and electron spin resonance (ESR). PSL could be used as a detection method on irradiated dried seaweed and dried shrimp as they showed photon counts greater than 5,000 counts/60 s (positive) in the irradiated samples with doses above l kGy. However, PSL could not be applied to detect irradiated seasoned dried filefish, because gamma-irradiated sample at 10 kGy even yielded photon counts less than 700 counts/60 s (negative). The ESR spectroscopy for only dried shrimp revealed specific signals derived from free radicals captured in the shell of shrimp. As a result, it is considered that PSL or ESR methods for detection of gamma-irradiated dried shrimp and only PSL can be used to detect gamma-irradiated seaweed. Furthermore, it is considered that hydrocarbon analysis of seasoned dried filefish containing fat by GC/MS and Thermo Luminance (TL) analysis of dried seaweed should be studied for detection of irradiation.

• Journal of Radiation Industry
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• v.6 no.3
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• pp.217-221
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• 2012

The purpose of this study is to reduce the immune toxicity of lipopolysaccharide (LPS) by gamma irradiation. LPS was gamma-irradiated at the various doses of 20, 100 and 200 kGy and then evaluated on the immune toxicity through the cell proliferation, nitricoxide production and cytokine release. Cell proliferation significantly decreased in the intact LPS treated groups, whereas gamma-irradiated LPS treated group were not reduced the cell proliferation. Similarly, the production of nitric oxide and cytokine showed the high levels in the intact LPS treated group. However, gamma-irradiated LPS treated group remarkably decreased the production of nitric oxide and cytokine in dose-dependent manner. Therefore, gamma irradiation may effective method to reduce the immune toxicity of LPS.

• Journal of Aerospace System Engineering
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• v.18 no.2
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• pp.87-94
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• 2024

The International Civil Aviation Organization (ICAO) has set up the Global Aviation Security Plan (GASeP), which urges member states to transition to more advanced security systems. This paper examines advanced aviation security policies and technologies at both domestic and international levels, and also investigates the underlying reasons for the challenges faced in establishing an advanced security system in the Republic of Korea. Based on this analysis, we propose effective strategies for deploying advanced security equipment at domestic airports, taking into consideration their respective classifications. Additionally, we identify the need for establishing new technological standards to introduce an advanced aviation security system, and provide evaluation criteria for the maintenance and management of technology to ensure the smooth operation of advanced security equipment.