• Title/Summary/Keyword: Wind & Fire

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Study about the Cause and Mechanism of the Itching (소양(瘙痒)의 병인.병기(病因.病機)에 대한 연구)

  • Park, Seung-Lim;Kang, Jung-Soo
    • Journal of Haehwa Medicine
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    • v.22 no.1
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    • pp.11-21
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    • 2013
  • After studying the cause and mechanism of the itching with the perspective of chronic medical books including Neijing, and the annotators, the conclusions are as follows. 1. The itching, which has correlation with the heart, is the deficiency symptom(虛症). It is generated when the lung-metal(肺金) is infected by the fire pathogen(火邪) and developed to depression(鬱), because of the heart fire flaming upward of circuit year(歲火太過). The treatment is to make metal depression scatter(金鬱泄之). 2. The itching occurs between the dermis(膚) and the epidermis(皮). 3. The itching generates when the excess of yang exuberance(熱盛極) precede the transmission of the wind-heats(風熱), the wind-cold(風寒), and the wind-dampness(風濕). It causes the blood deficiency(血虛) and the blood stasis(血瘀) because of the skin dryness. 4. The itching usually generates during summer, causes the body fever(身熱) and the dermis pain(膚痛). When it becomes worse, it causes generalized itching and vesicles at the whole body(浸淫). 5. The itching is related to the spirit(魄), which works in unconsciousness and the movement of defense qi(衛氣) in night.

Mass Flow Rates and Performance of Natural Smoke Ventilators in High-rise Buildings (초고층건물에서 배연창의 풍량해석 및 배연성능)

  • Lim, Chae-Hyun;Kim, Bum-Gyu;Park, Yong-Hwan
    • Fire Science and Engineering
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    • v.23 no.6
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    • pp.91-97
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    • 2009
  • The mass flow rates and performance of natural smoke ventilators in high-rise buildings with 40, 80, 120 stories were evaluated using CONTAMW tool. The results showed that only limited part of smoke ventilators can have positive exhaust flow in high-rise buildings due to stack effect and wind velocities. In the higher story buildings larger stack effect can overcome outside strong wind effect to give more ventilation performance. The air tightness of the building have strong effect on the exhaust performance of the ventilators to give lower performance with loose air tightness of the exterior walls.

Statistical Modeling on Weather Parameters to Develop Forest Fire Forecasting System

  • Trivedi, Manish;Kumar, Manoj;Shukla, Ripunjai
    • The Korean Journal of Applied Statistics
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    • v.22 no.1
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    • pp.221-235
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    • 2009
  • This manuscript illustrates the comparative study between ARIMA and Exponential Smoothing modeling to develop forest fire forecasting system using different weather parameters. In this paper, authors have developed the most suitable and closest forecasting models like ARIMA and Exponential Smoothing techniques using different weather parameters. Authors have considered the extremes of the Wind speed, Radiation, Maximum Temperature and Deviation Temperature of the Summer Season form March to June month for the Ranchi Region in Jharkhand. The data is taken by own resource with the help of Automatic Weather Station. This paper consists a deep study of the effect of extreme values of the different parameters on the weather fluctuations which creates forest fires in the region. In this paper, the numerical illustration has been incorporated to support the present study. Comparative study of different suitable models also incorporated and best fitted model has been tested for these parameters.

Fire and Explosion Analysis for Quantitative Risk Assessment on LNG Test Plant (LNG 시험 플랜트의 정량적 위해도 평가를 위한 화재 및 폭발사고 해석)

  • Han, Yong Shik;Kim, Myungbae;Do, Kyu Hyung;Kim, Tae Hoon;Choi, Byungil
    • Journal of the Korean Society of Combustion
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    • v.20 no.1
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    • pp.1-5
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    • 2015
  • Fire and explosion analysis are performed for the quantitative risk assessment on the LNG test plant. From the analysis for a case of fire due to large leakage of LNG from the tank, it is obtained that loss of lives can be occurred within the radius of 60 m from the fire origin. Specially, wind can extend the extent of damage. Because the LNG test plant is not enclosed, the explosion overpressure is less than 6 kPa and the explosion has little effect on the integrity of the LNG test plant.

The study of Safety education, safe experience for students to develop research simulreyiteo (안전체험 시뮬레이터 개발에 관한 연구)

  • Kim, Tae-hwan
    • Journal of the Society of Disaster Information
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    • v.6 no.1
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    • pp.46-59
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    • 2010
  • In this study, the safety training of comparative analysis of the realities of Korea's safety training and international experience and practical training for the safety experience of a virtual reality simulator, the development of safe conduct as a controlled motion simulator system, image H / W and the control system works, sound effects H / W and the control system works, 4D special effects (smoke, heat, wind, vibration) and a control system integration, mission control system for the selection and evaluation of the proposal, and safety training on Game S / W of development as we have never experienced an earthquake action plan and evacuate to escape the power of experience and the experience of an earthquake (vibration + video), Also the collapse and a fire escape on the experience of following second disaster, the building collapsed during an escape experience in the field, in case of fire According to the initial fire suppression and fire extinguisher usage experience - experience of smoke and heat to escape in, Moreover, the Daegu subway fire in public places such as subway and evacuated to escape the experience, considering the suggested Simulator.

Response Time Index and Operation Time of Fixed Temperature Heat Detector (정온식 열감지기의 응답시간지수 및 작동시간)

  • 류호철;태순호;이병곤
    • Fire Science and Engineering
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    • v.7 no.1
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    • pp.11-16
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    • 1993
  • Fixed temperature heat detectors that respond to the heat generated in fire plume and alarm when the temperature reaches a specified point, give a great influences to the loss of life and property according to their reaction sensitivity. In this study, hot wind tunnel tests and compartment fire experiments were performed to investigate the response time and temperature of fixed temperature heat detector. As a result, simple equations were derived which can be predicted the response time and temperature of the fixed temperature heat detector for the ramp type fire. Also other useful data, such as the effective temperature, time constant, response time index(RTI) were obtained.

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Analysis of fires case through on-field survey of residential and commercial building in Ulsan (울산 주상복합건물 현장조사를 통한 화재사례 분석)

  • Cho, Hwi-Je;Lee, Byeong-Heun;Kwon, Young-Jin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.11a
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    • pp.84-85
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    • 2021
  • The fire that broke out in a residential and commercial complex in Ulsan in October 2020 was large, but no deaths occurred. For this reason, there was a difference from the previous cases, so it was analyzed through field survey. The fire was expanded to the entire building by aluminum composite panels constructed by external heat method and SMC panels in evacuation safety zones, and fire was expanded to nearby mart due to wind on the day of the fire, and there were many evacuation spaces such as 15th, 28th, and rooftop heliports.

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A study on the smoke control performance of the damper exhaust system at FCEV fire in tunnel for small vehicles (소형차 전용터널 내 수소연료전지차 화재시 집중배기방식의 제연성능에 관한 연구)

  • Hong, Seo-Hee;Baek, Doo-San
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.24 no.6
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    • pp.745-756
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    • 2022
  • The road tunnel is a semi-closed space that is blocked on all sides except the entrance and exit, and in the event of a fire, the smoke of the fire spreads longitudinally due to heat buoyancy caused by the fire and air currents that always exist in the tunnel. To solve this problem, smoke removal facilities are installed in road tunnels to secure a safe evacuation environment by controlling the direction of movement of smoke or directly smoking at fire points. In urban areas, the service level of urban roads decreases due to the increase in traffic due to the increase in population, and as a solution, the construction of underground roads in urban areas is increasing. When a fire occurs during hydrogen leakage through TPRD of a hydrogen fuel cell vehicle (FCEV), the fire intensity depends on the amount of leakage, and the maximum fire intensity depends on the orifice diameter of the TPRD. Considering the TPRD orifice diameter of 1.8 mm, this study analyzed the diffusion distance of fire smoke according to the wind speed of the roadway and the opening interval of the large exhaust port when the maximum fire intensity was 15 MW. As a result, it was analyzed that air flow in the tunnel could be controlled if the wind speed of the road in the tunnel was less than 1.25 m/s, and smoke could be controlled within 200 m from the fire if the damper interval was 50 m and 100 m.

Analysis of Parameters Affecting the Consequence of the Flash Fire Accident by the Release of Heavy Gas (무거운 가스의 누출에 의한 플래쉬화재사고에서 사고결과에 미치는 매개변수의 영향 분석)

  • Kim, Tae-Ok;Lee, Hern-Chang;Ham, Byeong-Ho;Cho, Ji-Hoon;Shin, Dong-Il;Jang, Seo-Il
    • Journal of the Korea Safety Management & Science
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    • v.8 no.6
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    • pp.29-39
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    • 2006
  • The effect of parameters on the consequence of the flash fire accident by the release of heavy gas(in this study, xylene vapor) was analyzed. Simulation results showed that the distance with the lower flammable limit($X_{LFL}$) was increased with the increase of the release hole diameter. For the case of the elevated release, $X_{LFL}$ was increased with the increase of the wind speed and the release height, but $X_{LFL}$ was not affected by the wind speed for the release on the ground level. Therefore, the accident in the elevated release was more dangerous than the release on the ground level. In this condition, the release height had more effect on $X_{LFL}$ at the night time than the daytime and in the urban area than the rural area.

A literatual study on the causes and treatments of the melasma. (기미에 關한 文獻的 考察)

  • Shin, Yun-sang;Roh, Sek-seon
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.11 no.1
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    • pp.82-98
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    • 1998
  • In the literatual studies on the causes and treatments of the melasma, the results were as follows. 1. Melasma is the blackish patch on the face, is belong to the cartegory of the 'Myunjin(面塵)', 'Myunganzung(면간증)', 'Jakban(雀斑)' etc. in Oriental medicine 2. Melasma is deeply associated with Yangming channel in Meridian, with the spleen, stomach, heart and kidney in Viscera. 3. The pathogenic factors of Melasma is divided five parts. One is insufficient of Yangming's energy in Neijing(內經). Two is incoordination between vital energy and blood caused by wind-evil and phlegm-retention syndrome. Three is anxiety impairing the spleen. Four is kidney-asthenia and fire-hyperactivity. Five is heat-evil. 4. In the treatments of Melasma, Sthenia-syndrome was used cooling blood and activating blood circulation, or dispelling wind-evil and promoting meridian, or expelling fire-evil and removing toxic material etc. Asthenia-syndrome was used invigorating the liver and kidney, or nourishing yin and keeping fire downwards etc. 5. Melasma is concerned with sun-light, is mostly seen in female. 6. In the prescription of Melasma, it was used Jujesamultang(酒製四物湯加減), Okyong -san(玉容散), Chunghwasungitang(沖和順氣湯), Okyongseosisan(玉容西施散), Yukmiji-hwanghwan(六味地黃丸) etc.

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