복합상영관 화재에 대한 화재모델링의 적용

허준호,김종훈,노삼규,김운형 한국화재소방학회 2004 한국화재소방학회논문지 Vol.18 No.1

다중이용시설의 화재시 온도분포 및 연기유동 모델링은 결정론적 모델(Deterministic Model)인 존모델(Zone Model) 필드모델(Field Model)이 주로 사용되고 있다. 존모델은 공간을 두개의 지역으로 구분하여 화재현상을 분석하고, 필드모델은 공간을 다수의 Cell로 구분하여 분석하고 있으나 두모델의 비교치에 대해서는 효용성 검증에 어려움을 겪고 있다. 따라서 화재현상의 모델링에 따른 수치적 이해와 관련자료의 검증을 통하여 실상황에 보다 근접한 새로운 모델의 개발이 요구된다. 본 논문에서는 두모델을 복합상영관은 실내공간에 적용하여 그 효용성을 분석해본 결과 공간 평균분포도에서는 존모델이, 세부적 공간현상에서는 필드모델의 적용이 적절한 것으로 판단된다. 또한 구체적인 화재의 성상과 감지기의 위치선정, 연기제어를 위한 제연설비의 검토를 위해서는 필드모델의 활용이 더욱 효과적이다. The deterministic modeling techniques like Zone model and Field model are mainly used for thermal distribution and smoke flow at fire case in multi use facilities. While Zone model analyse fire simulation by dividing spaces by 2 section, the Field model dividing many cells. However, the difficultly follows to prove efficiency between the two models when it applys. Therefore new modeling development is required which in closes to real situation by verify number algorithm and related data for fire modeling. The paper analyses the efficiency of two different fire modeling at interior spaces of multiplex cinema theater. It is found that the zone model for average distribution and the field model for detail space phenomenon are relevant to apply. Also, Filed model is useful to the result that fire analysis and position of detector and review for smoke control system.

Design and Simulation of Foundation Technology for Zigbee-based Smart Grid Home Network System using OPNET Simulation

허준호,제승모,서경룡 사단법인 인문사회과학기술융합학회 2015 예술인문사회융합멀티미디어논문지 Vol.5 No.4

The Internet of Things (IoT) and the Smart Grid both are being discussed as the technologies that would dominate Korean IT industry by 2020. The PLC, Zigbee, NFC, ANT, Wi-Fi, Bluetooth and RFID are considered to be the foundation technologies for the Smart Grid and in this paper, we propose a Zigbee-based Smart Grid Home Network System. A comparative analysis has been carried out by performing additional Mobile WiMAX-based simulations with respect to the research paper published in the conference proceedings and we confirmed that all the proposed system worked normally. Although the simulation results showed that the Mobile WiMAX has a better capability than Zigbee, the latter has more advantages in terms of scalability and the possibility of reducing the battery size as it features low-cost and low-power characteristics. As a standard technology for the low-cost and low-power oriented networks, the scalability can be achieved by its low-cost characteristic (i.e., many Zigbee equipments can be installed widely) and the size of battery can be reduced its low-power use characteristic. Considering the operating life, we’ve concluded that Zigbee could be more efficient for certain areas. The proposed foundation technology used for the system in this paper can be adapted to various areas of the IoT. Thus, in this paper, the OPNET Modeler 14.5 PL8, Zigbee-based scenario and WiMAX-based scenario had been used for the designing and simulations of both systems. We expect that it would be possible to apply the technology to a variety of fields of health-care, building and facility management, accident and disaster monitoring and meteorological observation as well.

A Design of Foundation Technology for PLC-based Smar t-gr ave(Tumulus) System

허준호,고태훈,서경룡 한국멀티미디어학회 2015 멀티미디어학회논문지 Vol.18 No.11

In the Republic of Korea, there’s been a culture called ‘Hyo’ since Koryo Dynasty and this word represents the meaning of paying utmost respects to one’s own parents and ancestors whether they are alive or have passed. However, nowadays, most of people live away from their family gravesites so that they do not and cannot take care of them except on the special holidays. For this reason, people could not respond promptly to the incidents occurred at the sites as they receive notifications much later dates most of the time. Thus, in this paper, we propose a low-cost gravesite monitoring system which the users can immediately respond to the disastrous events after being informed of current situations through PLC without delay. For the performance evaluation, the lab and test bed experiments were performed on an actual ship using 200Mbps and 500Mbps products instead of performing an on-site experiment after the system has actually been constructed. The Mountain Region PLC was installed on the power lines and the result showed successful 36.14Mbps communication. Therefore, we expect that this study will contribute in time and cost reduction while constructing the internet infrastructures in mountain regions or building the Smart-graves, tumulus, and charnel houses.

Simulation of Power Line Communication Slient Node Problem Using OPNET

허준호,서경룡 한국멀티미디어학회 2017 멀티미디어학회논문지 Vol.20 No.3

The Information & Communication Technology (ICT) and the Internet of Things (IoT) have become the major issues in Republic of Korea recently. While RS-232, Zigbee, and WiFi-related technologies are used in the ICT-based systems, we focus on the Power Line Communication (PLC) in this paper. By carrying out OPNET simulations, we've implemented the PLC Router Node Model, PLC Terminal Node Model, PLC Link Model, and PLC Palette Model and executed the simulations arranging 20 holds within the range of 400m (20m apart). As a result, we confirmed that the slient node problem had occurred at the point of 200m-2000m (as of 2016) distance preventing further communications. However, the control group, by contrast, was able to carry out the communications by installing a router. We expect that this paper will contribute to the development of a foundation technology which will saves costs by performing the simulation prior to building actual large-scale ICT Complex in the future work.

소수력 자원량 산정과 지리정보시스템 구축

허준호,박완순,윤정환,정상만 한국방재학회 2010 한국방재학회논문집 Vol.10 No.2

Small hydropower is one of the many types of new and renewable energy, which South Korea is planning to develop, as the country is abundant in endowed resources. In order to fully utilize small hydropower resources, there is a need for greater precision in quantifying small hydropower resources and establish an environment in which energy sources can be discovered using the small hydropower geographic information system. This study has given greater precision to calculating annual electricity generation and installed capacity of small hydropower plants of 840 standard basins by inquiring into average annual rainfall, basin area and runoff coefficient, which is anticipated to promote small hydropower resources utilization. Small hydropower geographic information system was also established by additionally providing base information on quantified small hydropower resources and analysis function and small hydropower generator status, rivers, basin, rainfall gauging station, water level gauging station etc., all of which were not provided by the domestic hydropower Resources Map System. Established GIS small hydropower energy system can be used to basic information for active uses of small hydropower energy which is scattered to the entire country. 소수력은 신재생에너지 중 하나로 우리나라에는 부존량이 매우 풍부하여 최근 개발에 대한 필요성이 대두되고 있다. 이러한 소수력 자원의 적극적인 활용을 위해 소수력 자원량 산정의 정확성을 제고하고, 소수력 지리정보시스템을 이용한 에너지원 발굴의 기반환경이 필요하다. 본 연구에서는 연평균강우량, 유역면적, 유출계수를 세분화시켜 840개의 표준유역에 대한 소수력 발전소 시설용량과 연간전기생산량을 산정하였으며, 산정된 소수력 자원량과 분석기능, 그리고 국내 소수력 자원지도시스템에서 제공되지 않았던 소수력 발전소 현황, 하천, 유역, 강우관측소, 수위관측소 등에 대한 기초정보를 제공하여 소수력 지리정보시스템을 구축하였다. 구축된 소수력 지리정보시스템은 전국에 산재되어 있는 소수력 자원의 적극적인 활용을 위한 기초정보로 활용될 수 있을 것으로 사료된다.

재발하는 간농양에서 총담관-십이지장 누공의 내시경적 치료 1예

허준호,최선택,손민수,이지은,정인희,기성호 영남대학교 의과대학 2013 Yeungnam University Journal of Medicine Vol.30 No.1

Cholelithiasis, duodenal ulcer, duodenal perforation and tumor invasion may lead to choledochoduodenal fistula (CDF). CDF often has no specific symptoms and may be incidentally detected in an upper gastrointestinal radiographic study or endoscopy; but in some cases, it may be accompanied by recurrent cholangitis and liver abscess. In this paper, a case of recurrent liver abscess caused by CDF is reported. A 62-year-old female was admitted to the authors’ hospital because of right upper quadrant pain and fever. The abdominal computed tomography showed a liver abscess in the right lobe. A duodenal fistulous orifice was detected with endoscopy, and a contrast was injected through the duodenal orifice using a catheter under fluoroscopy. The injection of the contrast revealed a fistulous track between the duodenal bulb and the common hepatic duct. In fistulas complicated by recurrent liver abscess, surgery or medical management may be needed. The CDF in this case study was treated via endoscopic clipping.

Design and Implementation of the Basic Technology for Solitary Senior Citizen's Lonely Death Monitor ing System using PLC

허준호,서경룡 한국멀티미디어학회 2015 멀티미디어학회논문지 Vol.18 No.6

The communications through the power lines are called as the PLC and this is a common name for the communication modes for the information delivery. This technology transmits the data through the power lines on which the information is stored with the form of high frequency signal. The characteristic of the frequency signal is that the signal can be separated from the power line through exclusive power line modem and transmitted to the terminal devices. In this paper, 'In-home Headcount' checking algorithm using Wi-Fi and taking above mentioned advantages is proposed, and the basic Technology for such Solitary Senior Citizen's Lonely Death monitoring system has been designed and implemented. The comparative analysis has been conducted in this paper with the test-operated and test bed-completed 'Hyosimi 119 Safety-Welfare System' which is still being tested since 2008. With the 'In-home Headcount Checking Algorithm', Wi-Fi connection/disconnection status and SSIDs of relevant Wi-Fis will be checked. We expect that our proposed method will become as the basic Technology which can prevent lonely deaths of elderly people living alone. Since the PLC technology can be normally implement all the functions used on internet anticipate that the technology could be applied to many areas to construct a new form of communication network.

Implementation of the PLC-based Foundation Technology of Electric Power Control/Monitoring for Micro Grid

허준호,김남중,서경룡 사단법인 인문사회과학기술융합학회 2015 예술인문사회융합멀티미디어논문지 Vol.5 No.6

Recently, in the Republic of Korea, Smart Grid, Micro Grid and IoT (Internet of Things) are at the center of discussion. Accordingly, various companies are competing to take the advantageous position by preoccupying technical patents and establishing their own standards to become a platform company for the Smart Homes, completing individual test bed experiments at the Smart Grid test beds Complex in Jeju Island. However, despite of a variety of product lines introduced to the market, their capacities are rarely being discussed academically and remain as popular subjects of study these days. Current research trend in both domestic and foreign studies has been focused on the subjects related to wireless communication technologies like WiFi and Zigbee or a typical cable communication technology like LAN, although the wireless communication technologies are now favoured more in terms of usability and cost-effectiveness as they do not require additional wiring works. That being said, at the last phase of Smart Home operation, one may encounter the problems in their reliability due to signal interference and attenuation and of course, it is not conceivable to use a cable-type communication like LAN for the Smart Homes. Thus, in this paper, we have implemented a foundation technology for the Micro Grid using the PLC technology. Proposed technology is fundamental to Smart Metering System which monitors, controls, and manages the household power flows, forming essential part of the Micro Grid system. The PLC technology applied here does not require extra installation works as it uses existing 220V power line(s) to transmit data so that we expect that it would supplement both wireless and cable-based methods.

국내 복합상영관 시설의 방재대책에 관한 연구

허준호,윤명오 한국화재소방학회 2002 한국화재소방학회논문지 Vol.16 No.2

21세기들어 영화산업의 발달로 탄생한 복합상영관에서는 수많은 사람들이 문화생활을 즐기고 소비하는 장소가 되고 있다. 그러나 복합상영관을 이용하는 수많은 사람들은 불특정다수인으로 복합상영관의 구조와 관련정보가 매우 부족하여 현실적으로 화재시 많은 인명피해가 예상된다. 특히, 복합상영관은 대부분 대형지하공간 또는 초고층건물의 상충부에 십여개의 상영관과 다양한 문화시설이 자리잡아 일시에 수많은 인파가 몰리는 대표적 다중이용시설이다. 만일 화재 등 재난이 발생하였을 경우, 수많은 관객들의 생명과 안전을 보장하기는 상당히 어려울 것이다. 그러므로, 이와같은 문제점을 극복하기 위하여 복합상영관에서의 화재·피난안전상 체계적인 방재대책이 필요하다. 본 연구는 복합상영관의 개념정립과 공간 및 위치에 따른 위험도 분석을 통하여 컴퓨터시뮬레이션을 실시하고 이를 바탕으로 적정한 방재대책의 방향성을 제시하였다. 21C, Multiplex Cinema Theater is made from movie industry developed and become a place where we can spend our free time and consuming. But, theater users, who are many and unspecified persons, are short of information on the Multiplex Cinema Theater, so that they may be injured or killed at the occurrence of fire accident. Particularly, Multiplex Cinema Theater is a place that underground space or top floor in highrise building had many people in theaters. However, this problem is difficult to solve that to protect human being and properties at the occurrence of fire accident in the Multiplex Cinema Theater, In order to overcome such problems, Multiplex Cinema Theater need fire protection solutions facilities concerning particulars to pay attention to the safety on a fire and evacuation. This study analysed Multiplex Cinema Theater concept and computer simulation for risk point.

Adult-Onset Juvenile Xanthogranuloma of the External Auditory Canal: A Case Report

허준호,김재균,김나라,서기영,최우선,변준수,이웅재,이태진 대한영상의학회 2016 대한영상의학회지 Vol.74 No.5

Juvenile xanthogranuloma (JXG) is a benign, spontaneously regressing lesion that usually occurs during the first year of life, but may also occur in adulthood. Although the most common presentation of JXG is the cutaneous lesion, it can also manifest in various visceral organs. JXG of the external auditory canal is extremely rare, and there have been only a few reports of those cases in the English literature. In this study, we present a case of pathologically proven JXG that occurred in the external auditory canal with a symptomatic clinical presentation.