비정상 열전도 방정식의 수치 해석을 이용한 화재 건물의 안전성 평가

태순호,이병곤 (社團法人)韓國火災·消防學會 1997 한국화재소방학회논문지 Vol.11 No.2

화재 모델에서 구한 가스층의 온도를 이용하여 비정상 열전도 방정식의 수치해석을 하면 유한 제어체적을 계산할 수 있으며 가열 온도와 저감율로 열에 의한 압축 및 휨 강도의 저하값을 계산할 수 있다. 또한 이 방법을 이용하여 콘크리트 구조물(기둥, 보등)의 안전성 평가에 잘 적용할 수 있었다. Numerical simulation of unsteady heat conduction equation were carried out by finite control volume method using the gas temperature derived from fire model as a boundary value. The reduction of compressive and flexural by heating were calculated from the temperature and the given reduction rate. It is shown that this method could be well applied to assess the safety of concrete column or beam of the burned building.

韓國風水地理思想의 硏究動向과 課題

李炳坤,李夢日 경북대학교 환태평양연구소 1989 環太平洋硏究 Vol.2 No.-

This study aims to review trends and to suggest problems of studies on the Korean P'ungsu Chiri thought. Researches on the Korean P'ungsu Chiri thought can be broadly divided into two: 1) the Korean geomancer's research; 2) researches in the contemporary disciplines. Geomancer's writings on P'ungsu Chiri is subdivided into two branches : dwellings for the dead and dwellings for the living. Some Korean geomancer write geomantic textbooks based on the pure Yin-Yang and Five Element theory. Some have tried to translate several geomantic textbooks written in Chinese. In recent years the Korean geomancer try to explain formal and technical aspects of P'ungsu Chiri. In other word, some recent geomancer have studied P'ungsu Chiri in relation to current scientific thought. Treatment of the P'ungsu theme in the contemporary discipline has been conducted in histroy, geography, philosophy, anthropology, architecture, literature, and so on. P'ungsu Chiri has been received attention from many scholars at the 1980s. Some studies were presented to the faculty of the graduate school in partial fulfillment of the requirements for the degree of Doctor of Philosophy. There are two distinctive ways of explaining P'ungsu Chiri. One takes all cosmological and metaphysical contents of P'ungsu chiri, the other takes the tangible features of P'ungsu and applies modern Western scientific concepts to interpreting P'ungsu Chiri. But there are two significant problems in previous studies on P'ungsu Chiri. The problem concerns the research theme. In many writings P'ungsu chiri was viewed from the conceptual background of Western culture. Furthermore, the theme and the study area implicit in many previous works appears to be overlapped. If one desires to understand intents of the korean P'ungsu Chiri thought, it need to be evaluated on the basis of its own theoretical underpinnings, within its own cultural context. The second problem is methodological in nature. Each discipline has studied P'ungsu Chiri by its own viewpoint. Therefore, the research on the development and changing process of the Korean P'ungsu Chiri thought is lacked in previous studies. There is a limit to the each disciplinary capacity for conducting comprehensive research capable of yielding generalized contents that contribute significantly towards our understanding of the Korean P'ungsu Chiri thought. These observations suggest that further research on P'ungsu Chiri be required more attention to be directed towards the interdisciplinary approach.

목재연소시의 실내화재성상과 안전대피시간

이병곤,태순호,정길순 한국산업안전학회 1993 한국안전학회지 Vol.8 No.2

Available Safe Egress Time(ASET) is the time available for occupants to evacuate safely in compartment fire, and it depends on the time of fire detection and hazardous conditions. The purpose of this study is to provide an analytical basis and experimental data for estimating the fire growth in compartments and the available safe egress time, and to compare the experimental data with those proposed equations. As a result, hazard order is poison to CO, descent of smoke layer, poison to CO₂, burn to hot smoke layer, and lack of O₂, ASET is lengthened in this order. Also, The more fire load is increased, the more ASET is shorted.

고속 전기 검측시스템

이병곤 한국철도학회 2018 철도저널 Vol.21 No.4

차동식 열감지기의 작동온도와 작동시간

이병곤,류호철 한국산업안전학회 1994 한국안전학회지 Vol.9 No.1

Rate of rise 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, simple equations were derived which can be predicted the response time and temperature of the rate of rise heat detector with the results of hot wind tunnel tests and compartment fire experiments.

線型 亂流剪斷應力모델에 의한 直四角形 조도를 갖는 二重圓管內의 非對稱流動의 解析

이병곤,최영돈 대한기계학회 1987 대한기계학회논문집 Vol.11 No.1

본 논문에서는 Maubach의 방법에 내재된 불합리한점을 보완하고자 Fig.1(b)와 같이 .iota.=0인 곳에서 속도구배를 ㄹ변환하여 마찰계수와 조도함수를 계산하였다. 이 방법에 의해 얻어진 속도분포에서는 .iota.=0인 곳에서 속도구배에 불연적성이 일어나지 않는다. A method is presented to calculate the fiction factor and velocity distribution of asymmetric flow in rough channels and annuli. This method is derived from an assumption of linearly-varying shear stress which is different from Maubach's constant shear stress assumption. This method gives continuous velocity gradient at the position of maximum velocity and the predicted velocity profiles are in better agreements with experimental data than those obtained by Maubach's method. In this paper, a new correlation of roughness function is proposed and the predictions of friction factors by this correlation agree well with experimental data.

韓國의 氣象災害 地域區分 : 實態分析과 地理的 分布를 中心으로

李炳坤,金日坤 慶北大學校 文理科大學 1978 文理學叢 Vol.5 No.-

In this paper the author investigated the actual conditions and geographical distribution of meteorological disasters which were occured during the past from 1904 to 1970 in Korea. The results are summarized as follows: (1) The degree of meteorological disasters in Korea ranks high level in the world. Also it seems that national development was impeding remarkably by these disasters. (2) It was found that the depth of demage, the frequeucy of occurence, the contents of various kinds of meteorological disasters vary in different localities. (see Table and Figure) (3) As a result, Korea is divided into six meteorological disaster regions according to the frequency of occurence by various kinds of meteorological disasters. 1) North-West Coast Disaster Region. (Seoul, Incheon) 2) North-East Coast Disaster Region. (Daegu, Jeonju, Gwangju, Chupungryeong) 4) Southern Coast Disaster Region. (Busan, Yeosu, Mogpo, Jeju) 5) South-East Coast Disaster Region. (Pohang, Ulsan) 6) Ulreungdo Disaster Region. (Ulreungdo)

韓國 麥類農業에 있어서의 氣候災害 地域區分

李炳坤 경북대학교 교육대학원 1976 논문집 Vol.6-7 No.-

The unexpected climate phenomenon caused by climate damage especially produces a great deal of damage from various farmings in our life. In this paper I make it a purpose to find out the area distribution characteristics by various kinds of damage affecting wheat and barley farming which is caused by climate damage. I have used a Japanese, Asai Dasro's method to accomplish this study by the use of a standard deviation and other brief basis. The characteristic of the result can be summarized like the following. 1) Damage from cold: The northwest of line to connect samchuck and Gunsan is much damage part but the southeast belongs to a little damag part. As a whole damage from cold shows the trend > the north > the south, and the east the west. 2) Damage caused by frost: All over south Korea belongs to much damage area but in the central part the crops especially suffer much damage due to frost. 3) Damage from hail: The north of the middle northern part to connect Gangneung and Dangjin is much damage area but the southern part is a little damage area and especially the southeast seashore, Jaejoo Island and Daegu form very little damage. The phenomenon of the north >the south in general is similar to that of the cold climate damage. 4) Damage from drought: A wide area of the east extending Gangneung accross the middle eastern part to pohang and one part of the southeast coast belong to much damage area. Except above parts, another area suffers a little damage and this damage tendency shows the east>the west. 5) Damage from storm: The damage by storm in general shows the south>the north and the west>the east. The above tendency shows an opposite phenomenon which is different from rice crop for this phenomenon is a result of prevailing wind(monsoon) by the different season for cultivating two crops. 6) Humid damage: All over south Korea belong to the little damage area but damage caused by humid in general is the west> the east and the seashore>the land.

우리나라 米作農業에 미치는 氣象災害에 關한 硏究 : 地理的 分布를 中心으로

李炳坤 慶北大學校 文理科大學 1973 文理學叢 Vol.1 No.-

Sometimes unexpected meteorologic variation brought big damages to the rice farming in our country. This study has been undertaken to investigate the characteristic influences of climatic variations on the rice farming, and the classification, the intensity and the regional dsitribution of damages done by them to it in Korea. For the purpose of investigating them, A) Standard deviation of climatic elemerts and B) Research on the relation between meteorologic elements and their damages to rice paddy in its growing season are compared with each other in this study. The characteristic results of this study are as follows: 1) Damages from a cold: This is almost non-existent except on the partial damage area of kangnung and limited area of central Korea. 2) Damage by flood: There lie many difficulties in investigating it through meteorlogic variation because the extent frequency of this damage are traced to other factors than weather condition, but the general observation that the heavy rainfall will make big flood damage is almost not real. In fact, rainfalls do not necessarily cause flood damages in rainy areas but the coastal area and the southern area of this country are mostly heavy-damaged ones (the northern part and central part of this country, the light-damaged ones). 3) Damage from drought: That varies with season in its degree but concentric circles which center around Pohang and the eastern coastal area mostly belong to low-damaged areas. Southern area and Inchon vicinity will be the least damaged area.

중증 두부 손상 환자의 예후인자와 그 유용성

이병곤,한병갑,김태영,김종문 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.3

The prognosis of severe head injured patients(Glasgow Coma Scale 3 to 8) was assessed through clinical prognostic factors in 209 cases, retrospectively. Severe head injured patients were 9.1% of all head trauma and 55% of cases were diffuse brain injury. Mechanism of injury were motorvehicle accident, falls, bicycle, and others. The patients with normal pupillary reaction had a significantly higher percentage of good outcome(77%) than the patient with bilateral 3rd nerve palsy(14.2%)(p<0.0001). 79% of good motor responsive patients had a good outcome compared to none of patients with poor motor response(p<0.0001). The patients with short duration of unawareness(within 30days) significantly higher percentage of good outcome(98%) than the patients with long duration of unawareness(24%)(p<0.0001). The patients with initial high GCS score(6-8 score) had a significantly higher good outcome(58%) than the patients with low GCS score(3-5 score)(p<0.0001). 87% of pediatric patients had a good outcome compared to 38% of adults(p<0.0001). The diffuse head injured patients without basal cistern compression had a significantly higher percentage of good outcome(83%) than the patients with basal cistern compression(41%)(p<0.0001). 62% of patients with skull fracture had a good outcome compared to 39% of patients without skull fracture(39%)(p<0.0017). Individual prognostic factors affect to patient's outcome and utilize to be powerful tool for assessing the relative efficacy of alternative treatments as well as patient's prognosis.