• Fire Science and Engineering
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• v.27 no.5
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• pp.38-43
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• 2013

An automatic spreading fire extinguisher usually installed in a closed area like a boiler room, a laundry store or a restaurant's kitchen room is one of the fire protection equipments. This extinguisher automatically discharges dry powder, extinguishing fire. As this extinguisher has the extinguishing capability applicable to the nominal protection area, objects outside the area cannot be properly extinguished. However only its number is being requested according to the floor area in the related laws, and the extinguishing capability depends on the distance from a fire source. In this study we tried to investigate the extinguishing capability of the automatic spreading fire extinguisher in accordance with horizontal separation distance from a fire source. It appeared that the maximum horizontal separation distance was about 30 cm for both class A and B fire to be certainly extinguished.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.277-281
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• 2011

장애학생들이 생활하는 특수학교의 경우 화재 발생빈도는 낮지만, 장애인은 초기 대응능력과 피난능력이 현저히 부족하므로 화재 발생 시 막대한 인명피해를 초래할 수 있다. 장애인의 안전한 피난을 위해서는 초기 소화설비와 피난에 필요한 경보설비, 피난설비의 설치 및 운영 그리고 피난보조자의 역할과 책임이 중요하기 때문에 특수학교를 대상으로 하여 소방시설의 설치 및 운영, 피난보조자의 화재안전의식에 대해 조사하였다. 그 결과 Fail-safe 원칙에 따라 2방향 이상의 피난이 가능해야 하지만 6개교 중 5개교가 평상시 안전을 이유로 비상구에 자물쇠를 채워 통행이 불가능하였고, 특수학교 교사들 중 피난시 교사들의 역할분담에 대해 54.2%가 모르고 있었으며, 피난보조자에 대해서도 64.5%가 모른다고 답하였다. 또한 소화기와 옥내소화전을 실제 사용해 본적 있는 교사는 각각 32.2%, 7.9%로 조사되어 화재발생시 초기소화를 담당해야 하는 교사들의 소화설비의 사용 경험이 부족한 것으로 나타났다.

• Korea Petroleum Association Journal
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• no.12 s.58
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• pp.13-21
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• 1985

80년대의 석유수요 감퇴 및 수요패턴 변화, 그리고 중동산유국 등의 정유능력 확대는 세계 정유산업에게 큰 도전이 되었다. 이에 대응하여 주요 소비국들은 원유처리능력을 삭감하는 동시에 비교적 가치가 낮은 제품을 고급화하는 설비능력을 증대시키기 위해 새로운 기술개발과 그 실용화에 힘쓰고 있다. 이러한 정유산업의 현재 추진경향과 함계, 산유국의 새로운 정유공장에서 수출되는 제품의 공급력과 그 지역별 영향 등을 최근 소화Shell사의 리포트를 통해 살펴본다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.04a
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• pp.356-359
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• 2003

영화유기화합물의 제거에 있어서 일반적으로 이용되는 금속분말로는 아연, 주석, 니켈, 납, 철 등이 알려져 있으며, 경제성과 반응성이 좋고, 독성을 야기하지 않는다는 측면에서 영가 철이 가장 많이 연구·실용화되어 적용되고 있는 실정이다. 본 연구에서는 제철부산물들의 비표면적 측정, 화학적 구성성분 분석 및 pH의 변화를 통해 TCE, PCE 제거능력 평가 및 탈염소화반응을 확인하였으며, 제철부산물인 사상분진과 열연슬러지가 TCE 및 PCE의 제거효율적인 측면이나 산업폐기물의 재활용적인 측면에서 순수철보다 우수하다는 것을 확인하였다.

• Fire Science and Engineering
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• v.16 no.3
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• pp.61-70
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• 2002

A fire extinguishing agent containing non-ionic surfactant which is environmentally friendly and low cost was prepared and tested its characteristics and fire fighting performance. Ethoxylated sorbitol septaoleate, containing 40 moles of ethylene oxide as the primary surfactant, linear ethoxylated secondary alcohol, containing 7-11 moles ethylene oxide as the secondary surfactant, and ethoxylated sorbitol trioleate, containing 40-50 moles of ethylene oxide were used in the agent. It is demonstrated that the water solution containing 6 wt％ agent is capable to extinguish gasoline fire when it is put into the fire four times as much as gasoline. According to the field test of class B fire with a unit 1, it is found that the fire fighting performance is directly proportional to the concentration of surfactant in the agent.

• Korean Chemical Engineering Research
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• v.53 no.6
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• pp.824-830
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• 2015

The influence of phosphorous precursors, $NH_4H_2PO_4$, $(NH_4)_2HPO_4$, $H_3PO_4$, $(C_2H_5)_3PO_4$, and $P_2O_5$, on the catalytic performance of the $BiFe_{0.65}MoP_{0.1}$ catalysts in the oxidative dehydrogenation of 1-butene to 1,3-butadiene was studied. The catalysts were characterized by XRD, $N_2$-sorption, ICP, SEM and TPRO analyses. It was not observed big difference on the physical properties of catalysts in accordance with used different phosphorous precursors, however, the catalytic performance was largely depended on the nature of the phosphorous precursors. Of various precursors, the $BiFe_{0.65}MoP_{0.1}$ oxide catalyst, which was prepared from a phosphoric acid precursor, showed the best catalytic performance. Conversion and yield to butadiene of the catalyst showed 79.5% and 67.7%, respectively, after 14 h on stream. The cation of phosphorous precursors was speculated to affect the lattice structure of the catalysts during catalyst preparation and this difference was influenced on the re-oxidation ability of the catalysts. Based on the results of TPRO, it was proposed that the catalytic performance could be correlated with re-oxidation ability of the catalysts.

• Korean Journal of Poultry Science
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• v.33 no.2
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• pp.133-139
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• 2006

This study was conducted to investigate the effects of dietary supplementation of Biotite V on growth performance, nutrients digestibility and serum and meat cholesterol in broiler chickens. A total of four hundred and eighty Arbor Acre broilers (male, 2-d-old) were used in current feeding trial for 5 weeks. Broilers were allocated to three dietary treatments with eight replications per treatment and twenty broilers per pen according to a randomized complete block design. Dietary treatments included: 1) CON (basal diet), 2) BV200 (basal diet+200 mesh Biotite V 1.5%) and 3) BV325 (basal diet+325 mesh Biotite V 1.5%). During the first week of experiment, Biotite V increased weight gain in treatment groups compared to CON treatment (P<0.05). Through the entire experimental period, weight gain, feed intake and feed/gain had no significant differences among the treatments (P>0.05). Digestibilities of DM and N were also not affected when diets included Biotite V (P>0.05). No effects were observed in Biotite V supplemented treatments compared to CON treatment on abdominal fat weight, meat and serum cholesterol concentrations (P>0.05). In conclusion, supplementation of Biotite V in broiler diets has no influence on growth performance, nutrients digestibility and can not decrease the cholesterol concentrations in meat and serum.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.54-57
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• 2012

지진에 의한 2차 피해 중 화재로 인한 피해가 거의 대부분이다. 따라서, 소화설비의 내진설계는 반드시 필요하며 소화능력을 유지해야 한다. 본 연구에서는 진동대 실험을 통하여 스프링클러 설비의 내진성능을 평가하였다. 스프링클러 설비의 내진성능을 평가하기 위하여 일반 설비와 내진처리가 된 설비를 동시에 시공하여 그 성능을 평가하였다. 또한, 시설물의 거동특성을 파악하기 위하여 시설별 변위응답, 가속도 응답, 가속도 응답스펙트럼을 통하여 시설물에 대한 내진성능을 평가하였다.

• Journal of the Korean GEO-environmental Society
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• v.13 no.9
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• pp.53-59
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• 2012

This study investigated characteristics of decomposition of tetrabutoxysilane (TBOS) as a slow release substrate (SRS) and on effect of TBOS decompostion compounds (acetate and butylate) for anaerobic dechlorination of trichloroethylene (TCE). In the batch experiment, TCE, cis-dichloroethene (cis-DCE), 1-butanol and TBOS were analysed by GC/FID and acetate and butylate were measured by HPLC. 1M of TBOS transferred and accumulated 4M of 1-butanol by abiotically hydrolysis reaction. The hydrolysis rate was in a range of 0.186 ${\mu}M/day$. On other hand, 1-butanol fermented to butyrate and acetate with indigenous culture from natural sediments. This results showed that TBOS could be used a slow release substrate in the natural sites. The dechlorinated potential of TCE with acetate and butyrate was increased with a decreasing initial TCE concentrations. In addition, first order coefficients of dechlorination with acetate as electron donor was higher then that with butyrate. It is because that dechlorination of Geobacter lovleyi was affected by substrate affinity, biodegradability and microbial acclimation on various substrates. However, dechlorinated potential of Geobacter lovleyi was decreased with accumulation cis-DCE in the anaerobic decholoronation process. The overall results indicated that SRS with Geobacter lovleyi might be a promising material for enhancing dechlorination of TCE on natural site and cis-DCE should be treated by ZVI as reductive material or by coexisting other dechlorinated bacteria.

• Defense and Technology
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• no.3 s.169
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• pp.22-27
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• 1993

국방부문에서 창출된 기술지식이 민간부문으로 이전되어 경졔적인 효과를 창출하기 위해서는 다음의 조건이 필요합니다. 첫째, 국방 관련 부문에서 창출된 기술지식이 원활이 이전될수 있는 다양한 이전 메커니즘이 구비되어야 합니다. 둘째, 민간부문이 그러한 지식을 탐색, 소화, 흡수 할수 있는 능력을 지니고 있어야 할 뿐만 아니라, 스스로가 그것을 상업화하기 위한 노력과 자원을 투자해야 합니다. 셋째, 민간기업이 국방기술을 상업화하는 것에 대한 인센티브가 제공되어야 합니다