韓國 主要都市의 都市氣候學的 考察

李炳坤 慶北大學校 1976 論文集 Vol.21 No.-

The phenomena that many populations and industries come to th major cities cause various problems. The urban climate is one of these examples. Presented in this paper are the tendency of changing in passing every year about the three elements: temperature, wind, humidity to examine closely the phenomena of major urban climate in Korea and urban climate having influence on population and inhabitant's environment. It's result is like following. 1) The phenomenon of a high temperature (Heat island) amomg the urban climate characteristics was remarkable. 2) The urban climate is essential part the pollution of atmosphere. 3) The lack of insolation and illumination has a big bad influence on the health of the city people. 4) The low humidity in urban increases dangerous degree in causing a fire. The specific features of changing of the elapse of every year about the climatic elements in korean major cities are as follow. 5) Temperature change is very notable, especially the lowest average temperature and winter average temperature showes the tendency of the most outstanding increase. 6) The annual average of wind velocity does not show the decreasing tendency but the average of highest wind velocity showes that of decrease. 7) Annual average and seasonal average of humidity does not show any decreasing tendency.

韓國의 春季 降水地域區分

李炳坤,文永守 경북대학교 환태평양연구소 1988 環太平洋硏究 Vol.1 No.-

This study attempts to divide precipitation regions of Korea by spring data and cluster analysis. The data used are the ten-daily mean precipitation of spring during the period of 1976-1985 taken by 60 weather stations of Korea Meteorological Service and the monthly mean precipitation of spring during the period of 1961-1980 taken by 240 precipitation stations of Construction Ministry. The results in this study are summarized as follows: (1) Seasonal precipitation regions of spring can be divided into 7 lst regions and 19 2nd regions. (2) The characteristics of divided regions are closely associated with the prevailing direction of air flow and the strike of mountain ranges. (3) Seasonal precipitation regions are simply divided compared to the annual precipitation regions.

인터넷을 이용한 화상 의료 진단시스템

이상열,김석현,여지환,황병곤 한국정보전략학회 1999 추계공동학술대회 논문집 Vol.- No.01

최근 인터넷의 보급 및 확대가 의료 환경에 중요한 변화를 가져오고 있다. 인터넷이 단순히 전세계의 정보를 얻는 단계에서 벗어나 의료의 중요한 부분이라고 할 수 있는 환자의 진단과 처방을 실시할 수 있는 원격진료 시스템까지 확대되어 이용되어지고 있다. 원격 진료 시스템이란 최근 부각되고 있는 멀티미디어 시스템인 오디오, 비디오 및 문자정보를 통신을 통하여 의료의 제공, 진단, 자문, 치료, 의료의 정보전달 등을 하는 행위이다. 원격진료 시스템은 화상진료, 전자의무기록, 특정인 호출 시스템으로 구성되어 있다.

폴리에틸렌 나노 복합체의 특성 연구

이재철,박일수,최재곤,조병욱 조선대학교 생산기술연구소 2004 生産技術硏究 Vol.26 No.1

Thermal property, structure and morphology of the LDPE/ organo-clay nano-composites prepared melt blending were investigated by using thermogravimetric analyzer (TGA), X-ray diffractometer (XRD) and scanning electron microscope (SEM). When the composition ratios of the compounds of LDPE/PE-g-MA/organo-clay were 70-90/10~30/1~5 (w/w/w), thermogravimetric analyses (TGA) performed in air showed a great increase in thermal stability of the LDPE/organo-clay nanocomposties. The maximum decomposition temperature of LDPE/organo-clay nanocomposite was increased by about 80 ℃ compared with pure LDPE. X-ray diffractograms of LDPE/organo-clay nanocomposites showed that the intercalation of polymer chains lead to increase the spacing between clay layers.

우리나라 主要都市와 그 隣接地域에서의 氣候變動 傾向

李炳坤,文永守 慶北大學校 1985 論文集 Vol.39 No.-

According to the series of several recent studies, it has been clear that the urban climate in Korea has its own characteristics due to the industrial development and population growth since 1960's. By analyzing the secular variation of climatic elements of the four cities chosen in this study and comparing these with those of rural areas near the cities, it is attempted to clarify quantitatively the characteristics of the urban climate. The results are summarized as follows: (1) The annual mean temperature shows an increasing tendency in urban area. While it decreases in august, it increases in January. (2) The amount of annual precipitation in urban area seems to decrease. However, there is much more precipitation in cities than in rural area in August. (3) The relative humidity in urban area is slightly decreasing. The urban area is less humid than rural area, particularly in August. (4) The number of fog days shows no noticeable change in the secular variation of urban area. However, they are noticeably fewer in urban area than in rural area, particularly in August. (5) The mean wind velocity shows no conspicuous change in urban area. However, it is stronger than that of rural area in August. (6) In urban area there is a tendency that the annual mean percentage of sunshine has decreased for ten years since 1965, and it has increased again after that. However, it is worth noting that the percentage in August in urban area has decrease steadily since 1965. Furthermore it is lower than that in rural area, particularly in August.

韓·日兩國의 廣域에 걸친 豪雨의 綜觀氣候學的 硏究

李炳坤 慶北大學校 1983 論文集 Vol.35 No.-

Traditional studies on climate is usually limited within national boundary. However, atomospheric movement is continous rather than discrete. Therefore, macro-approach is required to grasp the phenomena of broad area over the national boundries. This study puts emphasis on the analysis of the association between characteristic mechanism and distribution of heavy rain in the period of heavy rainfall, and their spatial and temporal variations in the broad area, Korea and Japan. The analysis places in, as a case study, pressure patterns of extratropical cyclone, Chang-Ma front, and typoon. The results are summarized as followings; 1) In the period of heavy rainfall, synoptic features such as high mixing ratio, low-level jet stream, and atomospheric unstability are shown up without any relationship with pressure patterns. 2) The synoptic features and distribution of precipitated area are resulted according to spatial and temporal variations of pressure patterns. 3) The distributive characteristics of precipitation at the time of extratropical cyclone and typoon are more effected by topography than Chang-Ma front. 4) Korea peninsula and Dong-Hae(Japan Sea) side of Japan are highly related with the passage of extratropical cyclone (so called Japan Sea cyclone in Japan) and Chang-Ma front development. Precipitation owing to typoon has shown to be high in the association between Korea peninsula and Kyu-shu and Western areas of Japan.

韓國 夏季旱魃의 綜觀場의 循環特性

李炳坤,楊辰錫 경북대학교 환태평양연구소 1988 環太平洋硏究 Vol.1 No.-

The purpose of this study is to identify the characteristics of circulation in the synoptic field of summer droughts in Korea. The results of this study may be summarized as follows. 1) The pressure surfaces height and temperature in June, which are lower for the drought period than for the wet period, are contrasted with those of July and August being higher. 2) During the drought period of June, the Korean Peninsula is located to the west of trough of westerly wave, so that the zonal index has a small value and zonal flow is weak. 3) During the drought period of July and August, the zonal indices are high value and the zonal flow is strong. 4) The droughts of June appear when a jet stream is located far from the southern side of eth korean Peninsula. 5) The droughts of July and August appear when a jet stream is located far from the northern side of the Peninsula.

韓國 主要都市의 目照 霧 現象에 關한 硏究 : 經年變化 傾向을 中心으로

李炳坤 慶北大學校 1976 論文集 Vol.22 No.-

In the previous report the writer treated changes of precipitation, wind velocity and temperature, which are characteristic of urban climate due to urban growth. In this reports, the writer chiefly deals with the sunshine and fog which pollute urban air because of the urban growth, examining closely secular change in major cities in Korea. The results are as follows; 1) The examination of five sunshine factors (duration of bright, percentage of sunshine, number of days with≥80%, number of days with<20%, number of days with sunless) shows remarkable tendency of secular change. 2) In particular, the phenomena of decreasing of the number of clear days and increasing of the number of cloudy days have appeared in urban areas since 1961. 3) It is understood that this phenomena will have bad influence on the health and welfare of the urban inhabitants. 4) Whole tendency of sunshine shows the following characteristics of the average: (1904―1954)>(1931―1960)>(1951―1973) 5) The urban fog shows the tendency of increasing from 1904 to 1960. 6) In all the five cities the number of days with fog decreases after 1961 and it agrees with Hokooi's theory of Japan. 7) Recently, in spite of the decreases of number of days with fog and amount of cloud, the phenomena of continued decrease of urban sunshine are considered as the result of the increase of the urban smog.

大邱市 冬秀氣溫의 分布에 關한 硏究

李炳坤,金日坤 慶北大學校 1977 論文集 Vol.23 No.-

This is a succession to the study on the distribution of summer air temperature, as referred to in the introduction. And this study equals the former one in the methodology, but is concerned with the case in winter season the horizontal distribution of winter air temperature in Daegu city. The results of this study can be summarized as follows; 1. The horizontal distribution of winter air temperature says that (1) In the early morning, the air temperature as a whole has larger (-)deviation with the distance from the urban center, excepting the northern industrial complex and the southern denser residantial area. Their air temperature is highest, particularily in the coldest month, January. This may result from the artificial heat radiation. (2) In afternoon, the average temperature both in every month and all three months (winter season) is marked by being still higher in route R 3. In addition, it has more dominant (-)deviation as the distance from the urban center increases. This also results from the increase of artificial heat radiation, which is caused by that increase of the density of human activities and of traffic in the study area through this period. (3) In the distribution of air temperature by night is found that the (-)deviation showes the greatest this time through the whole day. (4) Overall, average daily air temperature demonstrates the typical phenomenon of the distribution of urban air temperature. 2. In the cases of daily air temperature (1) The temperature range in horizontal dimention by every measurement time is greatest during the night. and that of early morning time and afternoon time is about the same eath other. (2) Daily range of air temperature increases as the distance does from urban center to suburbs, which supports the increasing mildness phenomenon in urban air temperature.

南韓의 雨期降水의 特色에 關한 硏究

李炳坤,楊辰錫 경북대학교 교육대학원 1977 논문집 Vol.8 No.-

Distribution of monthly precipitation in South Korea shows rapid increase in June and decrease from October on. Precipitation from June till September occupies more than 61% of annual precipitation, so this period is called rainy period. This period is not only high in intensity of precipitation but also coincides with growing period of crops, therefore this period often brings about flood and drought and gives much damage to our life. The aim of this study is to clarify from various points of view the phenomena of rainy period in South Korea, and its contents may be summarized as follow; As for the changing rate of precipitation, 1) The changing rate in rainy period is indeed low compared with that in dry period, but the former is far more important than the latter from the viewpoint of their influence on human life. 2) The changing rate of each month in rainy period reaches about 50%, which is so high that something must be done urgently. 3) The changing rate of south region is generally higher than that of north region, and so is the case with coastal v. interior. In regional distribution of precipitation of intensity of precipitation, 4) The general tendency in June is that south region is higher than north, west higher than east, coastal higher than interior. 5) In July, north is higher than south, which is the contrary to the phenomenon in June. 6) In August, it is similar to the phenomenon in July, and interior region is the least. 7) In September, it shows the similar phenomenon in June, that is, south is higher than north. The above phenomena have a close relation with main cause of precipitation in each month. 8) Generally, it shows the tendency of (Sept. > July. > Aug. > June) The frequency of classified heavy rainfall is, 9) Intensively high through rainy period, 10) The highest in July of all rainy months, 11) Coastal is in general higher than rainfally over 150㎜ becomes low as it moves northwards which indicates that typhoons are the main cause of heavy rainfall. As for extreme value of precipitation, 12) The range of distribution of high value is 1400㎜ thru 2100㎜, and Seoul-centered north-west region shows the highest, whereas Pohang-centered east area is the lowest. 13) The range of distribution of low value is 130㎜ thru 240㎜, the lowest is found in south-west coast and east coast whose high value is low is low. 14) Distribution of extreme value is similar to that of mean precipitation in rainy period and is also closely related with the distribution of high value and low value.