딤플을 적용한 평판에 대한 항력 감소 연구

백부근(Bu-Geun Paik),편영식(Young-Sik Pyun),김준형(Jun-Hyung Kim),김경열(Kyung-Youl Kim),김기섭(Kim1 ?Ki-Sup),정철민(Chul-Min Jung),김찬기(Chan-Ki Kim) 대한조선학회 2012 大韓造船學會 論文集 Vol.49 No.4

溫排水 지역 潮間帶 海藻群集의 種 多樣度

金亨根,孫徹鉉 江陵大學校東海岸地域硏究所 1993 東海岸硏究 Vol.4 No.2

古里 原子力發電所 연안에서 溫排水의 구배에 따른 潮間帶 海藻群集의 特性을 분석하기 위해 種 多樣度로서 비교하였다. 潮間帶의 潮位가 높을수록 種 豊度와 種 多樣度는 낮았으며 배수구에 가까운 곳에서 다양도의 값은 낮았다. 平均低潮線에서의 潮位(HT)와 배수구에서 떨어진 거리(DO)에 대한 種 多樣度(ASD)의 관계식은 ASD=2.1838-2.3582(HT)+0.0365(DO)로 나타났다. 배수구 주변의 海藻群集은 群集發達의 初期에서 成熟段階의 각 단계를 나타내는 것으로 간주되었다. In order to analysis the characteristics of intertidal algal communities at the coast of Kori Nuclear Power Plant located along a thermal pollution gradient were compared by the species diversity index. The higher tidal level, the lower the species richness and the diversity. The values of the diversity was also low near the outfalls. The formula of the relationship of algal species diversity(ASD) against tidal level(TL) from mean low water and the distance of the outfall(DO) is the following; ASD=2.1838-2.3582(HT)+0.0365(DO). Thermal effects near the discharge were similar to the decrease species diversity observed towards upper intertidal levels. Algal communities in the vicinity of the thermal discharge could be considered to represent the respective stages of community development from pioneer to mature.

척수 손상으로 발생된 신경인성 방광 환자의 요역동학 검사상 고위험 인자 분석

김형지,송인호,이근호 단국대학교 1998 論文集 Vol.32 No.-

Purpose : Spinal cord injury is one of the most devastating states of infirmity encountered by today's health care professional. Historically, urologic complication have been the major source of morbidity and mortality among spinal cord injury patients. The main objective in management of neuropathic bladder is the preservation of renal function because the renal deterioration is the most serious problem of neuropathic bladder. We investigated risk factors for renal dysfunction in neuropathic bladder from spinal cord injury. Materials and methods : A total 36 spinal cord injury patients of neuropathic bladder with voiding dysfunction was evaluated by urodynamic study and we analyzed the risk factors associated with upper urinary tract deterioration. Results : In cases of spinal cord injury, detrusor external sphincter dyssynergia and high detrusor pressure were risk factors of upper tract deterioration. Conclusions : In management of neuropathic bladder, the abnormalities of individual lesion-specific urodynamic parameters(detrusor sphincter dyssynergia, low compliance, high detrusor pressure) should be factored into the assessment of upper urinary tract deterioration.

대용량의 데이터셋에서 깊이우선탐색을 사용한 순차 패턴 마이닝

김형근,황환규 강원대학교 정보통신연구소 2005 정보통신논문지 Vol.9 No.-

Recent sequential pattern mining algorithms mine all of the frequent sequences satisfying a minimum support threshold in a large database. However, when a frequent sequence becomes very long, such mining will generate an explosive number of frequent sequence, which is prohibitively expensive in time. In this paper, we proposed a novel sequential pattern algorithm using only closed frequent sequences which are small subset of very large frequent sequences. Our algorithm extends the sequence by depth-first search strategy with effective pruning. Using bitmap representation of underlying databases, we can obtain a closed frequent sequence considerably faster than the currently reported methods.

효율적인 닫힌 빈발 시퀀스 마이닝

김형근,황환규 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

Recent sequential pattern mining algorithms mine all of the frequent sequences satisfying a minimum support threshold in a large database. However, when a frequent sequence becomes very long, such mining will generate an explosive number of frequent sequence, which is prohibitively expensive in time. In this paper, we proposed a novel sequential pattern algorithm using only closed frequent sequences which are small subset of very large frequent sequences. Our algorithm extends the sequence by depth-first search strategy with effective pruning. Using bitmap representation of underlying databases, we can obtain a closed frequent sequence considerably faster than the currently reported methods.

강릉연안 홍조 긴잎돌김(Porphyra pseudolinearis Ueda)의 원형질체 분리

김형근,김영대,전방욱 강릉대학교 동해안지역연구소 2000 東海岸硏究 Vol.11 No.2

Two kinds of enzymes solution, capable of degrading the cell wall of red alga Porphyra psuedolinearis Ueda, were prepared from the abalone acetone powder and alkaline hemicellulase. Selected vegetative fronds(3cm) were washed thoroughly in sterile seawater. These blade pieces was kept overnight in an antibiotic solution, and used for isolated protoplast. The vegetative tissue was pretreated, cut into small pieces and soaked in 10% papain solution, and then the small pieces of tissue were incubated in tube containing 5ml of 10% abalone aceton powder solution and 0.01% alkaline hemicellulase solution(MES buffer and pH 6.0) respectively. Protoplasts were removed from the enzyme solution by filtration through a 40μm nylon mesh followed by centrifuge. Yields of protoplasts was higher in alkalin hemicellulase solution(6.0×106/0.1g) than in abalone acetone powder solution(5.4×105/0.1g).

목포항의 항만현황과 개발방향에 관한 연구

김형근,신호식 木浦海洋大學校 1997 論文集 Vol.5 No.2

In this study the writer analyzed and suggested the situation of the port and development project of the Port of Mokpo which attaining 100th anniversary of opening a port. The important contents of the study can be summarized as follows: Firstly, The total length of wharf of Mokpo Port is composed of 4,964 meters. Among them, the length of cargo ships wharf is 3,962 meters and the length of passenger ships wharf is 351 meters and the length of fishing boats wharf is 633 meters. Secondly, For the last three years(1994-1996) the amount of harbour materials and the income of cargo work of the Port of Mokpo is analyzed as the lowest rank in the principal ports of the whole country. Thirdly, The development project of No.1 Wharf is suggested as a international passenger wharf and position wharf of international exchanges, and the development project of No.2,3 Wharf is suggested as a leisure wharf, and the development project of No.4,5 Wharf is suggested as a coasting passengers and tourists wharf, and the development project of Southern Port is suggested as a port of environmental fraternization, and the development project of Northern Port is suggested as a fishing port. Finally, In the municipal organization of Mokpo, the new establishment of the Department of the Ocean & Fisheries is suggested.

자란,풍란 및 나도풍란의 기내 종자발아에 관한 연구

김형근,강훈,소인섭 濟州大學校 亞熱帶農業硏究所 1999 亞熱帶農業硏究 Vol.16 No.-

우리나라 자생란인 자란의 기내파종시 적절한 소독방법과 적정배지 및 순화시 생존율을 높이기 위할 목적으로 uniconazole를 처리하고, 풍란과 나도풍란의 기내파종시 발아율을 높이기 위해 천연사과쥬스를 처리한 결과는 다음과 같다. 1. 자란의 기내파종시 종자를 Wilson 용액으로 소독하여 MS 혹은 Hyponex 3g/L 기본배지에 peptone 4g/L 배지에 파종하였을 때 발아와 생장이 가장 좋았다. 2. 기내 파종후 자란의 생장을 억제하기 위하여 uniconazole을 처리한 결과 활성탄 2g/L와 uniconazole 0.01mg/L를 첨가한 처리에서 초장이 넓은 타원형으로 알맞게 억제되었고, 활성탄이 첨가되면 uniconazole 이 활성탄에 흡수되어 억제효과가 다소 적어 활성탄을 첨가하지 않은 처리는 첨가한 처리보다 심하게 억제되었다. 3. 풍란의 기내파종시 Hyponex 3g/L 배지에서는 발아 후 생장이 전혀 이루어 지지 않았고 MS배지에서는 발아만 하였으나, Hyponex 3g/L에 천연 100% 사과쥬스를 첨가한 처리에서는 pH에 관계없이 전처리에서 발아하여 NAA 1mg/L에 활성탄을 첨가한 처리에서 발아와 생장이 가장 좋았다. 4. 나도풍란의 종자 발아와 생육에 대한 배지의 적용성은 풍란의 경우와 유사한 경향을 보여주었다. pH 5.8에 활성탄을 첨가하지 않고 NAA를 1mg/L 첨가한 처리만 발아 후 생장을 하였다. 발아와 생장이 잘된 배지는 Hyponex 3g/L에 천연 사과 주스 100ml/L를 첨가한 처리였으며 PH와 활성탄 및 NAA의 첨가에 관계없이 발아와 생장이 왕성했다. In order to find proper media, accurate sterilizing method and further growth on in vitro-seeding of Bletilla striata, korean native orchid, the uniconazole were treated. And the Neofinetia falcata and Aerides japonicum were treated with natural apple juice to improve germination ratio in vitro-seeding. The results obtained were as follows : 1. Germination and growth of Bletilla striata were the highest in case of seeding to MS or Hyponex 3g/L + peptone 4g/L media after sterilized them by Wilson's solution. 2. The results to promote growth of Bletilla striata after in vitro-seeding were that leaf shape was properly restrained widely ellipse in treated with 2g/L activated charcoal and 0.01mg/L uniconazole, and the treatment of uniconazole was more restrained than the treatment of activated charcoal. 3. In vitro-seeding of Neofinetia falcata, growth after germination was not affected in Hyponex 3g/L media and a little growth is shown in MS media. But in treatment which apple juice 100 ml/L was treated with Hyponex 3g/L, sprouting is shown in every treatments regardless of pH, and the total growth of seedlings is the best in the treatment of activated charcoal 2g/L and NAA 1mg/L. 4. In case of seeding of Aerides japonicum, germination rate and growth were similar trend to Neofinetia falcata. In every treatments of MS media, germination is a little bit, but further growth after germination was shown in treatment which treated NAA 1mg/L and pH 5.8 without activated charcoal. The best germination and growth media for 2 examined seeds were the treatment which apple juice 100 ml/L was treated with Hyponex 3g/L, but there was no effect on pH level, activated charcoal and NAA.

海上王 張保庫의 海上通路 推定에 관한 硏究

金亨根 木浦大學校 아시아文化硏究所 2000 아시아문화연구 Vol.4 No.-

In this study the writer would like to estimate the marine routes of Merchant Prince, Chang Pogo in a United Silla. For the purpose of this study the writer study the wind and current which effect the navigation of sailing ship, and ancient reference books and materials, especially the Work of Routes and Kingdoms of Ibn Khurdadhbih regarding to the ancient marine routes of Korea, China, Japan, Arab-Islam. The result of this study, in the era of three Kingdoms of the Korean Peninsular there were the Rochulsan route, the Cross route against the Yellow Sea. Tsushima route, the route of South China Sea. the route of East China Sea, the southern route of the Yellow Sea, the direct route of the East Sea and so on, and the route of the Jusan Archipelago, the route of Ryukyu. Especially in a United Silla, there were the Arab-Islam routes which connect between Korean Peninsular and Arab-Islam. Accordingly the writer estimate that Merchant Prince, Chang Pogo in an Unite Silla had traded with not only China, Japan but also Arab-Islam Countries using above marine routes.

古里 原子力發電所 연안 海藻群集의 種組成과 季節變化

金亨根 江陵大學校東海岸地域硏究所 1993 東海岸硏究 Vol.4 No.2

本 硏究는 古里 原子力發電所 연안의 排水口에서 거리가 멀어지는 구역에 따라 海藻群集의 種組成과 季節變化를 파악하기 위해 1987-1989년에 걸쳐 조사가 이루어졌다. 배수구에 가까운 近接구역(0-50m)의 種豊度는 溫排水 放出量이 증가함으로 감소되었으나 납작파래(Enteromorph compressa), 분부챗말(Padina arborescens), 작은구슬산호말(Corallina pilulifera)과 무절석회조류(melobesioids) 종은 對照區에서 보다 배수구에서 풍부하게 나타났다. 中間구역(50-200m)에 서식하는 불레기말(Colpomenia sinuosa), 고리매(Scytosiphon lomentaria), 미역(Undaria pinnatifida), 둥근돌김(Porphyra suborbiculata)과 개서실(Chondria crassicaulis)은 늦봄에서 초여름 기간 동안에 廣域구역(8km)에 비해 더 일찍 쇠퇴하였는데 이는 水溫上昇과 水溫變動의 頻度가 높게 나타났기 때문이었다. This study was conducted to find out the species composition and seasonal changes of marine algal communities with increasing distance from the thermal discharge in the coast of Kori Nuclear Power Plant during 1987-1989. The species richness of communuities in near-field region(0-50m) at the discharge decreased as thermal effluent increased. Despite this, Enteromorph compressa, Padina arborescens, Corallina pilulifera and melobesioids, were abundant at the outfall area than the control area. Colpomenia sinuosa, Scytosiphon lomentaria, Undaria pinnatifida, Porphyra suborbiculata, and Chondria crassicaulis in mid-field region(8km) between late spring and early summer. This was due to the elevated water temperature and high frequency of water temperature.