• Title/Summary/Keyword: body protection

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The development of fire protection trough (밀폐형 방재트러후 개발)

  • Hwang, S.C.;Kim, T.K.;Go, C.S.;Han, K.J.;Kim, D.B.
    • Proceedings of the KIEE Conference
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    • 1993.07b
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    • pp.1168-1170
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    • 1993
  • EHV underground transmission cable characterized by low loss and bulk capacity should have high reliability to be protected fully from external damages, not to speak of its quality. In 345kV underground transmission lines of our country, the usage of frie protection trough is standardized. Fire protection trough consists of combination of trough body, spacer, shutting board, fastener, and etc. and it is required to have a high level of fire-retardant characteristics and mechanical strength. Since 1992, we, GoldStar Cable, with collaboration of Lucky, have participated in the development of fire protect ion trough and completed the type test of manufacturing site and will be supposed to go into mass product within 1993.

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Suggestion for Improper Radiologic Examination Using Ionizing Radiation (전리방사선을 이용한 영상 검사의 부적절한 이용에 대한 제언)

  • Jong Seok Lee
    • Journal of the Korean Society of Radiology
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    • v.83 no.4
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    • pp.783-791
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    • 2022
  • The radiation emitted during radiological examinations can be harmful to the human body, but the technique is still used because it is helpful to the patient. Therefore, radiologic examinations must follow radiation protection principles such as justification and optimization, and only minimal required re-examinations should be performed. Proper use of radiation in the medical field can be achieved by proper education of individuals from multiple medical fields.

Transciptomic Analysis of Larval Fat Body of Plutella xylostella under Low Temperature (저온조건에서 배추좀나방(Plutella xylostella) 지방체 유전자 발현 변화)

  • Kim, Kwang-Ho;Lee, Dae-Weon
    • Korean Journal of Environmental Agriculture
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    • v.38 no.4
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    • pp.296-306
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    • 2019
  • BACKGROUND: Temperature is known to be the main factor affecting development, growth and reproduction of organisms and also a physical factor directly related to insect survival. Insects as ectothermal species should be responsive to climate changes for their survival and develop various survival strategies under the unfavorable temperature such as low temperature. The purpose of this study is to identify genes contributing to adaptation of low temperature. METHODS AND RESULTS: To identify genes contributing to adaptation of low temperature, the transcriptomic data were obtained from fat body in Plutella xyostella larvae via next generation sequencing. We identified structural proteins, heat shock proteins, antioxidant enzymes, detoxification proteins, and cryoprotectant mobilization and biosynthesis-related proteins. Genes encoding chitinase, cuticular protein, Hsp23, chytochrome protein, Glutathione S transferase, and phospholipase 2 were up-regulated under low temperature. Proteins related to energy metabolism such as UDP-glycosy ltransferase, trehalase and trehalose transporter were down-regulated. CONCLUSION: When insect pests were exposed to low temperature, changes in gene expression of fat body could provide some hints for understanding temperature adaptation strategies.

Design of motion-adaptable 3D printed impact protection pad (동작 가변적 3D 프린팅 충격보호패드의 설계)

  • Park, Junghyun;Lee, Jinsuk;Lee, Jeongran
    • The Research Journal of the Costume Culture
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    • v.30 no.3
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    • pp.403-413
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    • 2022
  • The purpose of this study was to develop a 3D mesh-type impact protection pad with excellent motion adaptability and functionality by applying 3D printing technology. The hexagonal 3D mesh, which constitutes the basic structure of the pad, comprises two types: small and large. The bridge connecting the basic units was designed as the I-type, V-type, IV-type, and VV-type. After evaluating the characteristics of the bridge, it was found that the V-type bridge had the highest flexibility and tensile elongation. The hip joint pad and knee pad were completed by combining the hexagonal 3D mesh structure with the optimal bridge design. The impact protection pad was printed using a fused deposition modeling-type 3D printer with a filament made of thermoplastic polyurethane material, and the protection pad's performance was evaluated. When an impact force of approximately 6,500N was applied to the pad, the force attenuation percentage was 78%, and when an impact force of approximately 8,000N was applied, the force attenuation percentage was 75%. Through these results, it was confirmed that the 3D-printed impact protection pad with a hexagonal 3D mesh structure connected by a V-shaped bridge developed in this study can adapt to changes in the body surface according to movement and provides excellent impact protection performance.

Invulnerability analysis of nuclear accidents emergency response organization network based on complex network

  • Wen Chen;Shuliang Zou;Changjun Qiu;Jianyong Dai;Meirong Zhang
    • Nuclear Engineering and Technology
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    • v.56 no.8
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    • pp.2923-2936
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    • 2024
  • Modern risk management philosophy emphasizes the invulnerability of human beings to cope with all kinds of emergencies. The Nuclear Accidents Emergency Response Organization (NAERO) of Nuclear Power Plant (NPP) is the primary body responsible for nuclear accidents emergency response. The invulnerability of the organization to disturbance or attack from internal and external sources is crucial in the completion of its response missions, reduction of severity of accidents, and assurance of public and environmental safety. This paper focused on the NAERO of a certain NPP in China, and applied the complex network theory to construct the network model of the organization. The topological characteristics of the network were analyzed. Four importance evaluation indexes of network nodes including Degree Centrality (DC), Betweeness Centrality (BC), Closeness Centrality (CC) and Eigenvector Centrality (EC), along with Pearson coefficient correlation among the indexes were calculated and analyzed. Size of the Largest Connected Component (LCC) and Network Efficiency were used as measures regarding the invulnerability of the network. Simulation experiments were conducted to assess the invulnerability of network against various attack strategies. These experiments were conducted both in the absence of node protection measures and under protection measures with different node protection rates. This study evaluated the invulnerability of the NAERO network, and provided significant decision-making basis for the enhancement of the network's invulnerability.

Analysis on the Fashion Cultural Product Design Applying on an Optical Fiber

  • Choi, Kyung-Hee
    • Journal of Fashion Business
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    • v.14 no.6
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    • pp.118-133
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    • 2010
  • This study aimed to seek character and design of fashion cultural product using an optical fiber, and inquire element to be able to apply when an optic-fiber design differentiation develop into craft art and design. At present, optical fibers are commercialized with the brands of Luminex, Lumitex, Lumigram, etc., and the products are developed diversely in cloths, fashion articles, and interior products. When electronic technology becomes confused not visually in the technology of textile, the characteristics of fashion designs applied with optical fiber can be approximately classified for amusement, sensitivity direction, interaction, and protective performances. Sensitive design is taken a serious view as a new expression method to be interesting and attractive as well as a kind of amusement method to make people feel fortuity they do not experience in normal fashion. Also, it pursues function of body protection as a medium of communication to convey message to wearer and observer on the basis of reciprocal action between clothes and wearer. Fashion cultural product using an optical fiber is a kind of amusement to be interesting and attractive as well as it pursues function of body protection as a medium of communication to convey message and sensitive design which is attractive.

The Assessment of The Collective Dose Resulting from Airborne Releases of Radionuclides (방사성핵종(放射性核種)의 대기방출(大氣放出)로 인한 집단선량(集團線量) 평가(評價))

  • Lee, Tea-Young;Yook, Chong-Chul;Lee, Byung-Ki
    • Journal of Radiation Protection and Research
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    • v.8 no.2
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    • pp.41-46
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    • 1983
  • Annual collective dose within 50 miles radius of Ko-ri I reactor site due to normal airborne effluent discharges in 1979 has been estimated by AIRDOS-EPA computer code. Gaussian plume equation is used for estimation of both horizontal and vertical dispersion of radionuclide release into the atmosphere. Also, radionuclide concentrations in meat, milk, and fresh produce consumed by near-by population are estimated by coupling the output of the atmospheric transport models with the USNRC terrestrial food chain models. Annual collective doses are found to be $3.348{\times}10^{-1}$ whole body manrem and 84.95 thyroid manrem. Whole body manrem calculated by AIRDOS-EPA computer code do not differ greatly from that calculated by GASPAR computer code, but value for thyroid manrem have been estimated lower than that calculated by GASPAR computer code.

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The Different Analysis of the Preference and Benefits Sought of Smart Clothing based on Demographic Characteristics (인구통계학적 특성에 따른 스마트 의류에 대한 선호도 및 추구혜택 차이 분석)

  • Park, Younghee
    • Journal of Fashion Business
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    • v.23 no.1
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    • pp.1-13
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    • 2019
  • This study aimed to analyze the preference, the factors of benefits sought, and the difference of benefits sought for smart clothing based on demographic characteristics. This survey study used questionnaire. The subjects of the survey consisted of men and women with ages ranging from twenty to fifty years old, who were living in Gyeongnam region. For the collected data analysis, Factor analysis, t-test, ANOVA, and Duncan multiple range tests were used by SPSS 23. The results obtained were as follows. The different analysis results for smart clothing based on demographic characteristics showed a significant difference with respect to marital status, age, monthly income, and occupation, but showed an insignificant difference with respect to gender. The factors of benefits sought for smart clothing were extracted from five factors-pursuit; image innovation and improvement, pursuit of healthcare, pursuit of body protection, pursuit of amusement and pleasure, and pursuit of hi-tech function. The different analysis results of smart clothing according to demographic characteristics showed a significant difference for pursuit of healthcare only with respect to gender, for pursuit of image innovation and improvement, healthcare, amusement and pleasure, and hi-tech function with respect to marital status, for pursuit of image innovation and improvement, healthcare, amusement and pleasure, and hi-tech function with respect to age, for pursuit of healthcare and body protection with respect to monthly income, and for all five factors with respect to occupation.

Effects of $\alpha$-Tocopherol and Perilla oil on the Toxicity of Polychlorinated biphenyl in Rat (랏트에 대한 Polychlorinated Biphenyl의 독성에 미치는 $\alpha$-Tocopherol과 Perilla oil의 효과)

  • 최경현;김문석;황두환;문재규;김성오
    • Environmental Analysis Health and Toxicology
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    • v.3 no.3_4
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    • pp.39-51
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    • 1988
  • Effects of ${\alpha}$-tocopherol and perilla oil on the toxicity of polychlorinated biphenyls (PCB) in male rat were studied. Rats were fed ad libitum for 6 weeks with the animal diet which contains PCB 30 ppm and 100 ppm. Perilla oil (0.5 g/kg body weight) and ${\alpha}$-tocopherol (30 mg/kg body weight) were administered intraperitoneally twice a week for 6 weeks. Rats fed with PCB showed enlargement of liver and spleen, increase in aspartate aminotransferase, alkaline phosphatase, sereum lipid and cytochrome P 450 and decrease in body weight and glutathione. When perilla oil was administered to rats fed with PCB increase in aspartate aminotransferase, alkaline phosphatase, serum lipid and cytochrome P45O and decrease in body weight and glutathione were significantly augmented, compared to rats fed with PCB alone. This means that perilla oil potentiates the toxicity of PCB. On the other hand when ${\alpha}$-tocopherol was administered to rats fed with PCB increase in aspartate aminotransferase, alkaline phosphatase, serum lipid and cytochrome P45O and decrease in body weight and glutathione were signigicantly reduced, compared to rats fed with PCB alone. This means that u-tocopherol reduces the toxicity of PCB. From the above results, it may be concluded that PCB is metabolized by microsomal mixed function oxidase and the metabolite causes the toxicity and microsomal glutathione plays a role of protection on the toxicity of PCB.

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