강원대학교 연습림내 蓮葉山과 九節山地域의 植物相에 관한 硏究

朴完根,廉圭眞,朴善貞 江原大學校 森林科學硏究所 1997 Journal of Forest Science Vol.13 No.-

要約강원대학교 연습림의 연엽산과 구절산 지역을 대상으로 植物相을 조사한 결과, 管束植物資源은 98科 345屬 551種 2亞種 88變種 10品種 2雜種으로 총 653분류군이 분포하는 것으로 나타났다. 이들 所産植物중 韓國特産植物은 20種類, 그리고 稀貴 및 滅種危機植物은 18種類가 분포하였으며, 自然生態系에 예측할 수 없는 영향을 초래하는 歸化植物은 27種類가 출현하였다. 귀화식물 種類수에 의한 自然破壞度(UI)는 약 12.4%로 나타났다. 또한 所産植物들의 有用度는 食用資源(42.1%), 藥用資源(33.8%), 牧草用(28.8%), 觀賞資源(11.8%), 木材資源(5.2%), 纖維資源(1.4%), 工業用(1.1%) 등의 순으로 나타났으며, 아직 용도가 밝혀지지 않은 植物資源도 140種類(21.4%)로 나타났다.ABSTRACTThis study was to survey the flora of resources vascular plants in the Experiment Forests of Kangwon National University. Resources vascular plants were composed of 98 families, 345 genera, 551 species, 2 subspecies, 88 varieties, 10 formae, and 2 hybrid, totaling 653 taxa. Among the investigated resources plants, Korean endemic plants and rare or endangered plants were distributed 20 taxa and 18 taxa, respectively. There were 27 taxa of Naturalized plants in this study area, which would have unpredictable influence on the natural ecosystem. The urbanized index(UI) of all over the investigated areas was about 12.4%. Useful resources plants were composed edible source(42.1%), medicinal source(33.8%), pasture source(28.8%), ornamental source(11.8%), timber source(5.2%), fiber source(1.4%), industrial source(1.1%). Vascular plants of unknown use were 140 taxa(21.4%)

CFRP 복합재 적층판의 파괴메카니즘에 관한 연구

이권범,박환규,홍석주,김기형 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1

In this study, when CFRP lamimates are subjected to static loading by the indentation of steel ball to examine a failure mechanism of lamimates, the fracture surface of interlaminar delamination generated at interfaces is investigated by the scanning electron microscopy (SEM). When orthotropic CFRP laimates stacked with two interface are subjected to static loading, interlaminar delaminations extend from the loading side to delamination edge even at any interface, and the fracture surface fo interlaminar delamination generated at two interfaces is symmertrically formed. In the CFRP laminates, the fracture mechanism sppears mainly to be the mixed mode(modes Ⅰ+Ⅱ), and the ratio of mixed mode varies partially. After the fracture initiates at the interface near the loading side with mode Ⅰ, the mixed mode gradually developes, but the total surface at the opposite plane to the loading side fractures with the mixed mode(modes Ⅰ+Ⅱ). While transverse cracks are generated, the direction of shear stresses reverses itself ar the delaminated surface, clarified by the hackle direction of fracture surface.

E.D.M의 가공특성과 가공변질층에 관한 연구

崔圭夏,朴達根 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.1

In this paper the study of wire-cut Electric Discharge Machining on high speed steel, the characteristics such as cutting speed and evaluated for discharge voltage, discharge current, water speed. Cutting speed are improved as discharge current, cutting speed and discharge low voltage show a few increased, many increased discharge high voltage. Cutting speeds are many increased water low speeds, a few increased water high speed. Damaged layer a few decreased discharge high voltage, Damaged layer a few decreased high discharge current. Damaged layer are little by little decreased high water speed, many increased low water speed.

Laparoscopic repair of parastomal and incisional hernias with a modified Sugarbaker technique

Duck Hyoun Jeong,Min Geun Park1,George Melich2,Hyuk Hur,Byung Soh Min,Seung Hyuk Baik,Nam Kyu Kim 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.84 No.6

A parastomal hernia is the most common surgical complication following stoma formation. As the field of laparoscopic surgery advances, different laparoscopic approaches to repair of parastomal hernias have been developed. Recently, the Sugarbaker technique has been reported to have lower recurrence rates compared to keyhole techniques. As far as we know, the Sugarbaker technique has not yet been performed in Korea. We herein present a case report of perhaps the first laparoscopic parastomal hernia repair with a modified Sugarbaker technique to be successfully carried out in Korea. A 79-year-old woman, who underwent an abdominoperineal resection for an adenocarcinoma of the rectum 9 years ago, presented with a large parastomal and incisional hernias, and was treated with a laparoscopic repair with a modified Sugarbaker technique. Six months after surgery, follow-up with the patient has shown no evidence of recurrence.

온라인 화상 인증을 위한 분산 객체 활성화 시스템

허진경,양환석,박승규,장근실,김종민 朝鮮大學校 統計硏究所 2007 統計硏究所論文誌 Vol.9 No.1

클라이언트로부터 전송되는 인증 데이터를 실시간으로 서버에서 분석하여 처리하는 시스템의 경우에는 입력되는 데이터의 양에 비례하여 서버의 부담은 증가하게 된다. 이때 서버에서는 데이터의 병목현상이 발생하게 되고, 이는 바로 전체적인 시스템의 성능을 저하시키는 결과를 초래하게 된다. 본 논문에서는 데이터 처리의 병목현상을 해결하여 시스템의 성능을 높일 뿐만 아니라, 인터넷상의 유휴 서버들을 활용할 수 있게 하기 위한 방안으로 분산처리 기술을 이용한 전처리 작업 시스템과 그 성능을 향상시키기 위한 분산 객체 활성화 시스템을 제안한다.

손가락 끝 점을 이용한 손 형상 인식

김종민,이웅기,장근실,양환석,허진경,박승규 朝鮮大學校 統計硏究所 2007 統計硏究所論文誌 Vol.9 No.1

최근 사용자 친화형 유저 인터페이스 구현을 위해 인간의 손 형상을 실시간으로 인식하는 연구의 중요성이 부각되고 있다. 그러나 인간의 손은 자유도가 크기 때문에 손 형상을 정확히 인식하기란 매우 어렵고 또한 피부색과 유사한 색을 가지는 복잡한 배경에서는 더욱 곤란하다. 본 논문에서는 별도의 센서를 부착하지 않고 카메라를 사용하여 피부색 정보에 의한 손 형상을 분할한 후 손가락 끝 점을 찾는다. 찾은 손가락 끝 점을 이용하여 방향을 탐지하는 알고리즘에 대해 기술한다. 이 방법은 템플리트 매칭을 이용하여 손가락 끝 점을 탐색한 후 찾은 손가락 끝 점과 손목의 중심을 이용하여 전, 후, 좌, 우 방향을 탐지한다. 제안하는 방법을 이용하여 3D 가상현실 공간에서의 네비게이션(Navigation)에 응용하였으며, 실험결과 전진, 후진 및 좌측, 우측의 방향전환도 매우 좋은 결과를 보였다. 또한 본 논문에서 제안하는 방법은 마우스, 키보드, 조이스틱 등의 조작 없이 전, 후, 좌, 우 방향전환을 사용자가 직관적으로 지시함으로써 보다 자연스러운 인간과 컴퓨터의 상호작용을 제공할 수 있을 것이다.

국립공원 관리원들의 여가활동 유형과 여가기능에 관한 연구

박장근(Jang Geun Park),유영규(Young Kyu Yu) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.47

The purpose of this study is to investigate types, circumstances and functions of leisure activities for the National Park Services. A questionnaire that has total 27 questions is used as a tool to survey. The twelve Parks out of 29 nationwide National Parks are selected as samples and 718 the National Park Services are selected as subjects. The result are following The first, the type of leisure activities for the National Park Services are the sports activities, watching and listening activities, tourism and resorts activities, other and relaxation, hobbies and liberal arts activities, social activities and play, recreational activities. The second, the circumstances of leisure activities for the National Park Services are followings: the career involvement of leisure activity is three years or more, frequency of participation in a week is once, the time involved is 1-2 hours or less, the expense is 50,000 won or less. Leisure activity is necessary for the work. The reasons of leisure activity is health and fitness. The barrier is time. The motives for participation are health, and maintaining and promoting fitness most. The third, the circumstances, frequency, time of leisure participation are influenced negatively on leisure function. However, the expense of leisure and work performance are influenced positively.

A New Forage Barley Cultivar with Semi-Smooth Awn and High Yielding ‘Miho’

Young-Jin Oh,Tae-Il Park,Hyoung-Ho Park,Ouk-Kyu Han,Jong-Chul Park,Tae-Hwa Song,Yang-Kil Kim,Hyeon-Jung Kang,Jae-Seong Choi,Yun-Woo Jang,Kwang-Geun Park,Jong-Ho Park,Chon-Sik Kang,Young-Keun Cheong,Ky 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

The purpose of development new variety ‘Miho’ (Hordeum vulgare L.) is a favorite with livestock feed and develop varieties resistant to disease and lodging. ‘Miho’ was carrying the growth habit of group Ⅲ, green and mid-wide leaf. Awn that are related to preference of livestock is a semi-smooth awn. This cultivar had 96cm of culm length, 650 of spikes per m2. Heading date of ‘Miho’ is April 27, and maturing dates on May 30, which were later than cultivar ‘Youngyang’. It also showed strong winter hardiness, and similar resistance to shattering and BaYMV compared with those of check one. The best thing among the traits of one is a new good quality with the plant green at the latter growing period. The average forage dry matter yield in the regional yield trial was about 13.1, 12.1 MT per ha in upland and paddy field, respectively, which were 9%, 2% higher than that of the check cultivar. It’s also showed 6.8% crude protein, 27.1% ADF (acid detergent fiber), and 67.5% TDN (Total Digestible Nutrients), including higher silage quality for whole crop barley. This cultivar would be suitable for the area whose daily minimum temperature was above -8℃ in January in Korean peninsula.

Comparing greenhouse gas emissions and nutritional values based on Korean suggested meal plans and modified vegan meal plans

( Geun-woo Park ),( Ji-yung Kim ),( Min Hyeok Lee ),( Jung-im Yun ),( Kyu-hyun Park ) 한국축산학회 2020 한국축산학회지 Vol.62 No.1

Producing animal products from farm to table emits massive amounts of greenhouse gases (GHGs). Modified meal plans, mainly including vegetables and grains, have been recommended to reduce GHG emissions. However, these meal plans have not been developed with regard to the micronutrient content, but rather with regard to the energy requirements of grains and vegetables, which could result in a nutritional imbalance. For this reason, we investigated a common Korean suggested meal plan (SMP) from the National Institute of Agricultural Sciences, in which nutritional conditions were considered, and evaluated its GHG emissions using the Life Cycle Assessment Inventory Database and nutritional values. The SMP, which included meat, was based on the Korean Nutrition Society for adult men age 19 to 29, and was changed to a vegan meal plan (VMP). Animal-based protein sources were substituted for meat alternatives, such as beans and tofu, for which carbon footprint data was available. To compare the nutritional differences, the 9th Korean Food Composition Tables I and II were consulted. To calculate GHG emissions, the carbon footprint data of the food was converted to a CO₂ equivalent (CO₂e) using a procedure from the Foundation of Agriculture Technology Commercialization and Transfer. It was found that GHG emissions per calorie were 18% lower for the VMP when compared to the SMP. However, if GHG emissions per total amino acids were evaluated, the VMP GHG emissions per total amino acids were 0.12 g CO₂e/mg, while the corresponding value for the SMP was 0.06 g CO₂e/mg. The Korean daily meat intake reported by the Korea Agricultural Statistics Service was 37.1% lower than in the SMP, but when converted to a protein intake the figure was 17.0% lower. It was found that each SMP resulted in more GHG emissions than the VMP, but when considered as GHG emissions per total amino acids, the opposite pattern was apparent. There is a need to conduct more detailed studies of the variation in GHG emissions with different meal plans, using the daily meat intake per person.

Estimating milk production losses by heat stress and its impacts on greenhouse gas emissions in Korean dairy farms

Geun Woo Park,Mohammad Ataallahi,Seon Yong Ham,Sejong OH,김기연,Kyu Hyun Park 한국축산학회 2022 한국축산학회지 Vol.64 No.4

Meteorological disasters caused by climate change like heat, cold waves, and unusually long rainy seasons affect the milk productivity of cows. Studies have been conducted on how milk productivity and milk compositions change due to heat stress (HS). However, the estimation of losses in milk production due to HS and hereby environmental impacts of greenhouse gas (GHG) emissions are yet to be evaluated in Korean dairy farms. Dairy milk production and milk compositions data from March to October 2018, provided by the Korea Dairy Committee (KDC), were used to compare regional milk production with the temperature-humidity index (THI). Raw data for the daily temperature and relative humidity in 2018 were obtained from the Korea Meteorological Administration (KMA). This data was used to calculate the THI and the difference between the maximum and minimum temperature changing rate, as the average daily temperature range, to show the extent to which the temperature gap can affect milk productivity. The amount of milk was calculated based on the price of 926 won/kg from KDC. The results showed that the average milk production rate was the highest within the THI range 60–73 in three regions in May: Chulwon (northern region), Hwasung (central region), and Gunwi (southern region). The average milk production decreased by 4.96 ± 1.48% in northern region, 7.12 ± 2.36% in central region, and 7.94 ± 2.57% in southern region from June to August, which had a THI range of 73 or more, when compared to May. Based on the results, the level of THI should be maintained like May. If so, the farmers can earn a profit of 9,128,730 won/farm in northern region, 9,967,880 won/farm in central region, and 12,245,300 won/farm in southern region. Additionally, the average number of cows raised can be reduced by 2.41 ± 0.35 heads/farm, thereby reducing GHG emissions by 29.61 ± 4.36 kg CO2eq/day on average. Overall, the conclusion suggests that maintaining environmental conditions in the summer that are similar to those in May is necessary. This knowledge can be used for basic research to persuade farmers to change farm facilities to increase the economic benefits and improve animal welfare.