• The Journal of the Petrological Society of Korea
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• v.19 no.1
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• pp.103-108
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• 2010

U-Pb zircon age for the Hongjesa granite, in the northeast Yeongnam massif, was determined using LA-ICP-MS. We obtained upper intercept age of $2013^{+30}/_{-24}(2{\sigma})$ Ma, indicating Paleoproterozoic granitic magmatism together with the Buncheon and Pyeonghae granite gneisses of the region.

• Journal of Digital Contents Society
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• v.5 no.3
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• pp.219-224
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• 2004

In This paper, we have analyzed the power spectrum of DS-TH Ulhawideband (Direct Sequence-Time Hopping UWB) system which used pseudo-noise (PN) code. The DS-TH UWB system proposed in this paper multiplies the information signal with PN code to construct pulse train with random pattern and then the chips in pulse train are bundled into several groups to map to the particular value. The (+)/(-) pulse is tented in the time slot of frame by comparing a particular value with timing information that was stored in the lookup table. Thus, the energy spark (Comb Line) which is generated certainly in convantional system can be suppressed efficiently by PN code. And we knew that the proposed DS-TH UWB System even could have very smoothing power spectrum ctaracteristic without applying high speed Time-Hopping code.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.29 no.1
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• pp.168-173
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• 2016

Objective : The purpose of this study is to investigate the recurrence rate of Chronic Idiopathic Urticaria patients treated with Pyungweesangamibang through long-term follow-up survey.Methods : This tracing study was conducted for sixty-seven Chronic Idiopathic Urticaria patients who received and have finished treatment with Pyungweesangamibang at Woobo Korean Medicine Clinic in 2013 and 2014.Result : 81.4% of the patients, who had spent over 1 year since the finish of treatment with Pyungweesangamibang, did not relapse. In case of more than 2 years elapse, 66.7% of the patients did not suffer relapse.Conclusion : The result of tracing recurrence of the Chronic Idiopathic Urticaria patients treated with Pyungweesangamibang describes that the Korean medical treatment (Pyungweesangamibang prescription) shows lower recurrence rate than other general treatment shows.

• Fire Science and Engineering
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• v.25 no.6
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• pp.112-119
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• 2011

In this study, a fire cause of setting fire to one's own car to collect the insurance is analyzed. Through a close examination of causes of this car fire, it is suggested to improve current practices and institutions: (1) A collection system of fallen vehicle parts or fire debris in the fire site should be established; (2) A system of providing fire site information in detail should be established when a police station requests National Institute of Scientific Investigation (NISI) to examine causes of vehicle fires; (3) When a burned car is suspected of arson, a fire station and a police station should maintain a mutual cooperation system; (4) Procedures of examining the causes of vehicle arson in National Institute of Scientific Investigation (NISI) should be improved; and (5) Recognition of the examination of fire causes and correlation with analysis equipment should be changed.

• Fire Science and Engineering
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• v.25 no.6
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• pp.44-50
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• 2011

Japan has a very advanced volunteer fire brigade system as an interdependent organization by local residents due to frequent natural disasters. Japan has fostered and developed the volunteer fire brigade in the national level to response rapidly and appropriately to earthquake or natural disasters even in the urban area that has sufficient fire stations and fire officers. This study analyzes the situation of operating the volunteer fire brigade in Japan in detail and compares the result with Korean situation. Finally, this study suggests policies which can be introduced to activate the volunteer fire brigade in Korea.

• Fire Science and Engineering
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• v.25 no.6
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• pp.178-183
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• 2011

In cold season, the elevator systems in super high-rise buildings would make noises at the door-gaps on high floors, and the elevator doors on the 1st floor would suffer from opening/closing trouble due to the pressure differences. Such pressure differences are also the main driving power of smokes through the hoistway in the case of fire. In addition, the pressure differences should be overcome to use the elevator systems as a measure of emergency escape. This paper reviews the way of hoistway pressurization to reduce the adverse influences. Simulations achieved a good result close to the requirements of NFPA 92A and IBC 2012 under the condition that the hoistway should be pressurized after pressure equalizing between floors and hoistway with the openings through the hoistway wall.

• Fire Science and Engineering
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• v.23 no.5
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• pp.173-180
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• 2009

As cities become recently more crowded, various and enlarged, it is required a cutting-edge technology for fire industry. According to this, a transition is attempted from production intensive industry toward knowledge based industry. At this point, in order to develop fire industry into knowledge based high value industry, industry innovation capability is required and it heavily depends on human resource competitiveness. Accordingly, in this study is aimed to look the status of domestic fire industry personnel training by classifying the fire industry manpower by field skill personnel, high technology personnel, and professional research personnel and to suggest problems with personnel training followed by each classification and how to improve them.

• Fire Science and Engineering
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• v.32 no.1
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• pp.99-107
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• 2018

Diesel cars employ a diesel particulate filter (DPF) to reduce the discharge of fine dust. However, cases of fires caused by DPFs have been reported in diesel cars. In this study, I examined the regulation of exhaust gas and exhaust gas recirculation in diesel cars. Then, I analyzed cases of car fires caused by DPFs, their characteristics, car fire factors related to DPFs and preventive measures, and their consideration in investigations of the causes of fires. Finally, regarding car fire investigations, this study proposed a process of proving that fires are caused by DPFs.

• Fire Science and Engineering
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• v.33 no.4
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• pp.130-139
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• 2019

The electronics factory fire, that occurred at 15:40 on August 21, 2018, killed nine people and injured six. This study analyzes the causes of many of the casualties from the fire, and is based on fire investigation results and so on. The findings suggest that major causes included failure of the automatic alarm system to function, failure of the emergency broadcasting system to function, the fire suddenly spreading due to polyurethane foam in a ceiling on the 4thfloor, a power outage immediately after the fire started, a sprinkler system that was not working, a delay in reporting the fire, and improper management of fire facilities by a fire safety management company.

• Transactions of the Korean Society of Automotive Engineers
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• v.12 no.6
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• pp.103-110
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• 2004

The major trend in global automotive market is changing drastically in the way that a vehicle FECPS(Front End Cooling Pack System) is designed and manufactured as an assembly part. The system can encompass many functions, be assembled into a vehicle as a module, and reduce the production cost as well as time. The FECPS consists of an impact beam, an aluminum condenser and a radiator, a carrier and a cooling fan with a BLDC motor. In order to predict the performance of a FECPS accurately, it is essential to properly model the air flow field through various heat exchangers, such as a condenser or a radiator. In this study, the flow field of the system is measured by a PIV(Particle Image Velocimetry) system. The result is compared with that measured with multi-channel anemometer.