• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.491-492
• /
• 2003

The large amount of smoke produced near Lake Baikal was transported to Northeast Asia with high AOT (Aerosol Optical Thickness) as seen in satellite images. Aerosol retrieval using a separation technique was applied to MODIS (Moderate Imaging Spectroradiometer) and SeaWiFS (Sea-viewing Wide Field-of-view Sensor) data observed during 14-22 May 2003. Large AOT, 2.0~5.0 was observed on 20 May 2003 over Korea due to the influence of the long range transport of smoke aerosol plume from the Russian fires, resulting in high PM10 concentration was observed at the surface.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2010년도 추계학술대회
• /
• pp.213-214
• /
• 2010

The Arc fault is primary reason of electric fire. so we must detect. the purpose of this study is to extend our knowledge of AC-arc characteristics and detect. The Arcs are produced by separating two electrodes made with graphite and copper. A very low separation speed allows arcs to reinitiate, as in arc fault in wires. Power is 220Vrms-60Hz and the load is light bulbs and capacities are 220W, 660W and 1100W. I measured Arc voltage and current. and defined voltage and current Max level, voltage plateau and Arc-power at each cycle.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 추계학술대회 논문집
• /
• pp.275-280
• /
• 2008

Recently the railway safety is very important issue in Korea because there are lots of changes like the separation of operation and facility of national rail network, the inauguration of high speed train and Daegu subway fire accident. Railway safety management system is based on risk assessment of rolling stocks, electrical system, signaling, operation & maintenance and human element. With this process, railway risk will be reduced as low as reasonably acceptable level. Through risk assessment on accident data, this study predicted the current risk level of railway electrical system and presented the proper safety ensuring measures.

• 한국재난정보학회 논문집
• /
• 제16권2호
• /
• pp.237-247
• /
• 2020

연구목적: 본 연구는 스프링클러설비 소화성능 향상을 위해 국내 NFSC 103 스프링클러헤드 살수장애 방지 기준의 문제점을 검토하고 이의 개선방안을 도출함으로서 화재 시 국민의 생명과 재산 보호에 기여하는 것을 목적으로 한다. 연구방법: 국내 NFSC 103 스프링클러헤드 살수장애 방지 기준의 문제점과 이의 개선방안을 도출하고자 소방선진국인 미국 화재방호협회(NFPA) 최신 스프링클러 설치기준인 2019년판 NFPA 13 의 스프링클러헤드 살수장애 방지 기준을 국내 화재안전기준 NFSC 103과 비교 연구하였다. 연구결과: 국내 NFSC 103 살수장애 방지 기준은 살수장애 개념조차도 정의되어 있지 않고 있을 뿐만 아니라 측벽형 스프링클러 헤드 살수장애 기준 부재, "3배 이격" 기준의 "높이" 기준 부재 등 다수의 상세기준에서 많은 보완 및 개선이 필요함이 연구결과 확인되었다. 결론: 국내 NFSC 103 살수장애 방지 기준은 살수장애의 개념적 정의 도입, 측벽형 스프링클러 헤드 살수장애 방지기준 추가, 장애구조물 사용실태를 고려한 헤드 추가기준 마련, 장애물 "높이"를 고려한 "3배 이격" 거리 기준 보완, 살수패턴을 반영한 살수장애 방지기준 상세화 등 의 개선을 통하여 소방선진국과 동등 수준 이상으로의 화재안전기준 선진화를 도모하고 이를 통하여 스프링클러 설비의 소화성능에 대한 신뢰성을 증진시켜 나가야 한다.

• 한국화재소방학회논문지
• /
• 제32권4호
• /
• pp.60-68
• /
• 2018

공동주택의 복잡한 평면 구조와 향상된 벽간 차음성능으로 인해 화재상황의 전달 및 인지가 어려워 피해가 증가되고 있는 실정이다. 본 연구에서는 국내 공동주택 평면 형태를 대상으로 소방시설 중 비상방송설비의 명료성에 대한 실태분석을 진행하였다. 아울러 피난방송의 명확한 인지를 위한 음성명료도 개선 방안을 시뮬레이션을 통해 분석하였다. 현장측정 결과 72, 84, 101 Type 모두 국내 경보설비기준인 90 dBA를 R1 지점에서 만족하지 못하는 것으로 나타났다. 또한 72 Type의 L1 지점(거실) 79.8 dBA를 제외하고는 모든 측정지점에서 출입문을 열었을 때와 닫았을 때 모두 NFPA 기준 75 dBA를 만족하지 못하는 것으로 평가되었다. 침실의 출입문 개구 상태를 기준으로 국내 화재안전기준에서 제시된 1 m 이격지점에서 90 dBA 이상을 만족시 각 침실에서 NFPA 기준인 음압레벨 75 dBA와 CIS 0.7을 만족하였다.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
• /
• pp.230-235
• /
• 2001

There are more than 15 millions cars or motors in Taiwan. According to the statistics from Environmental Protection Administration, the number of resulting scrap tires are near 110 thousand tons each year. The tire recycle programs in Taiwan were first conducted in 1989 and executed by ROC Scrap Tire Foundation. However, the current efficiency of the tire recycling industry still needs to be improved to minimize the environmental problem or fire hazards caused by scrap tires storage. Ten major tire-recycling factories are surveyed in this study. The investigations include the source of scrap tire, the shredding process, the market of products, the management of wastes disposal, and the difficulties of these sectors. As the varieties of the shredding machines of the recycle factories, there are three kinds of final products which include powder, granular, and chips. The wastes, wires and fibers, produced by the shredding process are the major problems fur all the factories. The percentage of the wire and fiber removal from rubbers still needs to be increased. The best approaches found in this study to increase the efficiency of scrap tire recycling processes are proposed which include the improvement of magnetic separation system fiber/rubber separation system and the minimization of waste disposal. A categorized standard of the processing outputs is suggested as a reference for the decision-making of the tire-recycling factories.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
• /
• 제26권1호
• /
• pp.73-84
• /
• 2020

Purpose: Though Korean healthcare services have been upgraded, infection and fire had been broken out in general hospitals. And higher concerns about quality assessment made it to clinical laboratory design guideline studies. So, this study investigates the facilities, equipment and personnel of laboratory medicine focusing on more than five hundred fifty bed hospital, and contributes to make guidelines for safety and efficiency in lab. Methods: Questionnaires to supervisor technologist and field surveys to medical laboratories in korean hospitals have been conducted for the data collection. 16 answers have been analysed statistically by MS Excel program. Results: Most of the sample tests such as hematology, clinical chemistry, immunology, transfusion, urinalysis, microbiology and molecular diagnosis are performed by more than 80% in large sized general hospital laboratory. In the test methods, automatic analyzers are used up to 80%, total laboratory automation up to 43% in clinical chemistry and immunology, and manual tests in all sorts of the test. There are placed in single lab or two and three labs above the ground, which are all in semi-open lab. There is some correlation with the number of specimens and the number of lab people depending on the number of hospital beds. Laboratory environment shows that work distance is good, but evacuation path width, visibility, separation of staff area from automatic analyzer, and equipment installations are needed to have more spaces and gears. Most of the infection controls are equipped with mechanical ventilation, air-conditioning, washbasin and wastewater separation, BSC installation and negative pressure lab room. Implications: Although the laboratory space area is calculated considering the number of hospital beds, type of tests and number of staff, hospital's expertise and the samples numbers per year should be taken into account in the planning of the hospital.

• 한국재난정보학회 논문집
• /
• 제9권4호
• /
• pp.429-438
• /
• 2013

본 연구에서는 초고층 피난안전설계 기준 개선을 위하여 국내외 피난관계법령에 대하여 비교분석 하였다. 그 결과, 국내 피난관계법령기준 개선사항을 다음과 같이 요약할 수 있다. 첫 번째, 수용인원에 대한 피난용량을 산정하도록 하며, 2이상의 출구 요구시 1개 출구접근 불가할 경우에도 피난용량의 50%이상을 충족하도록 해야 한다. 두 번째, 계단 또는 출구간 이격거리 기준 규정을 통해 이방향 피난이 원활이 이루어질 수 있도록 해야 한다. 세 번째, 막다른 복도 및 통로에 대한 길이제한을 규정해야하며 이는 스프링클러 유무에 따라서도 제한의 차등을 두어야 한다. 네 번째, 피난안전구역과 엘리베이터 및 계단의 경우 안전한 피난경로를 확보하며 피난유도를 하여야 하며, 피난층 이외의 층에서도 수평방향의 피난안전성 확보를 위하여 별도의 피난안전구역 마련이 필요하다.

• Natural Product Sciences
• /
• 제24권3호
• /
• pp.206-212
• /
• 2018

Xanthii Fructus has been traditionally used for the treatment of rhinitis, rheumatoid arthritis, and eczema. In this study, a high-performance liquid chromatography-photodiode array (HPLC-PDA) method was developed and then used for the simultaneous analysis of eight phenylpropanoids in Xanthii Fructus. The analytical column used for this separation was a $SunFire^{TM}$ $C_{18}$ column, maintained at $40^{\circ}C$. The mobile phase used was 1.0% acetic acid in distilled water and 1.0% acetic acid in acetonitrile with gradient elution. For identify of each component, the mass spectrometer (MS) was used a Waters triple quadrupole mass spectrometer requipped with electrospray ionization (ESI) source. The HPLC-PDA method showed good linearity: correlation coefficients were ${\geq}0.9996$. The limits of detection and quantification of the eight compounds were 0.02 - 0.04 and $0.06-0.14{\mu}g/mL$, respectively. The extraction recoveries ranged from 97.51 to 108.67%. The relative standard deviation values of intra- and inter-day precision were 0.06 - 1.55 and 0.09 - 1.68%, respectively. The validated HPLC-PDA method was applied to simultaneously analyse the amounts of eight phenlypropanoids in Xanthii Fructus.

• 생약학회지
• /
• 제47권4호
• /
• pp.360-365
• /
• 2016

The aim of this study was to compare the amount of spinosin in the 70% ethanol extracts of non-processed Zizyphi Semem (ZS) and processed ZS by roasting using a high-performance liquid chromatography equipped with photodiode array detector. Separation of the spinosin was used $SunFire^{TM}$ $C_{18}$ analytical column ($5{\mu}m$, $4.6{\times}150mm$) using two mobile phase consisting of distilled water and acetonitrile, both with 1.0% (v/v) acetic acid. The flow rate was 1.0 mL/min and injection volume was $10{\mu}L$. Calibration curve of the spinosin was y = 22339.45x+483.99 in tested concentration range ($1.28-20.00{\mu}g/mL$) and correlation coefficient was 1.0000. In non-processed ZS sample, the amount of the spinosin was 0.94 m/g, while, the amount of the marker compound in processed ZS samples were 0.66-1.10 mg/g.