해로드 앱 연계 해상추락자 자동신고장치

이병곤,채종국,최대영,임영민 한국항해항만학회 2018 한국항해항만학회 학술대회논문집 Vol.2018 No.추계

근 해상에서 외부충격으로 정신을 잃고 바다에 빠져 익사하는 사고가 발생하고 있어 해양안전 및 공익을 위해 해양수산부에서는 선박에서 해상으로 추락 시 해로드 앱과 연계되어 조난자의 위치를 자동으로 발신하여 구조요청을 할 수 있는 장치를 개발하였다.

우리나라 바람의 氣候學的 諸特性

李炳坤 慶北大學校 1984 論文集 Vol.37 No.-

The purpose of this study is to clarify some climatological aspects of winds in Korea using the wind statistics. The results are as follows: 1. The annual march of the wind velocity was presented using the mean value of every half decades. Types of the annual march are grouped into six: (1) Yellow sea side type (2) Korean strait side type (3) Donghae sea side type (4) Inland type (5) Highland type (6) Island type 2. In the number of days with wind velocity by class (1) Island, Yellow sea side, and Korean strait side type have high value in the occurrence freguency of days with daily maximum wind velocity of more than 10m/s, but Donghae sea side and Inland type show the low value. This fact means that it reflect well the effects of the direction of air flow into the Korea and topograpical features. (2) The scale of wind velocity corresponding to each number of days has some trends with the regional distribution of the occurrence frequency of daily maximum wind velocity of more than 10m/s. 3. The annual march of the daily variation in wind velocity could be classified into three types. (1) Ⅰ type: annual variation is more pronounced than daily variation. (2) Ⅱ type: daily variation is more pronounced than annual variation. (3) Ⅲ type: both daily and annual variation is pronounced. 4. In distributional characteristics of the monthly mean wind vector (1) The monthly mean value rotate, as a whole, conunterclockwise direction through the whole year. (2) In the case of east-west components of the monthly mean wind vector, Yellow seside, Korean strait side and Inland show the high value of west wind components, while Donghe sea side shows the high value of east wind components. (3) Especially it is noted that the components of north-west wind and south-east wind are extremely weak.

인터넷 폭주제어 메카니즘의 성능 분석

이병곤,송화선,김주영,정영준 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-

The congestion control is one of most important factors to maintain QoS and to provide reliable services in Internet applications. This paper has studied Internet flow controls and discussed the characteristics of proposed congestion control mechanisms. This paper has analyzed their characteristics of the optimum parameters for congestion controls in respect with fairness and service throughput. Also this paper discusses how the offensive UDP traffics produce the performance degradation of TCP traffic services in congestion environment.

한국사회의 부정부패 실태 및 대책 - 공무원의 부정부패를 중심으로 -

이병곤 한국공안행정학회 2001 한국공안행정학회보 Vol.0 No.12

고속 전기 검측시스템

이병곤 한국철도학회 2018 철도저널 Vol.21 No.4

豪雨日의 氣壓配置型 特性에 關한 硏究

李炳坤 경북대학교 사회과학대학 1982 社會科學 Vol.1 No.-

This thesis defines that heavy rain day is daily precipitation ≥50㎜. Monthly total frequency of heavy rain day is examined for the categories ≥50㎜,≥80㎜,≥100㎜,≥150㎜,≥200㎜ during 10 years, from 1966 to 1975. Pressure pattern is classified for the heavy rain days of the categories and characteristics of seasonal and regional variations. The major findings can be summarized as followings: 1. Revealed frequency of each category indicates that as increases the level of categories, decreases an exponential function. 2. Seasonal distribution of heavy rain days frequency concentrates on, from June to October, and shows the higher concentration than precipitation ratio of the same period. As increases the category class, concentration of heary rain days increases. 3. The characteristics of pressure pattern of heavy rain days are : (1) Heavy rain day frequencies by extratropical cyclone is higer than other pressure pattern, and it concentrates during 6 months, April to September. (2) Heavy rain days by other frontal and trough type concentrate during April to September like extratropical cyclone, but frequency of heavy rain days decreases as increase of category class. (3) Heavy rainfall days by stationary front type reveals a constant ratio regardless class of heavy rain category and concentrates during three months, June to August. (4) Heavy rain days by typoon concentrates during three months, July to September, and as increases class of heavy rain category, the concentration ratio of frequency increases, and show the highest ratio at daily rain ≥200㎜. (5) Unclassification pattern has a few in number, and does not show over the ≥150㎜ class of heary rain categories. 4. Regional dominant pressure pattern of heavy rain are: (1) extratropical cyclone at south coastal area, south west coastal area and northern part of Jeju island. (2) typoon at east coast, west coast, and southern part of Jeju islands, and (3) extratropical cyclone and stationary front at interior.

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.

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.

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)

물 - 시멘트비 및 염화물이 고온에 노출된 콘크리트의 압축강도에 미치는 영향

이병곤,태순호 한국산업안전학회 1999 한국안전학회지 Vol.14 No.1

Product background of cement, sand and coarse aggregate differ from country to country, so that thermal behaviour of concrete make a difference in high temperature. To cope with demand, this paper is a study on compressive strength for W/C 45%, 55% and 65% by using domestic portland cement, Han-river sand, sea sand and crushed-coarse aggregate. As a result, it is shown that it is estimating to the mechanical properties of heated concrete specimens under various W/C ratio.