코일형 곡관에서 층류맥동유동의 전단응력분포

박우룡,유영태,모양우,최주호 順天大學校 1992 論文集 Vol.11 No.1

The characteristics of the shear stress distributionsrare studied theoretically and experimentally for the laminar steady flow and the laminar pulsating flow generated by butterfly valve in the coiled pipes with the curvature ratio of 30. The shear stress distributions are abruptly changed from θ = -60˚~-40˚ in the plane direction. The shear stress distributions for the laminar steady flow and the pulsating flow increase abruptly near the wall.

심부전증에서 Doppler Tissue Image를 이용한 비동시성 심실수축(Myocardial Dyssynchronicity)의 측정 : 심전도와비교 Comparison with EKG

구소영,조구영,한성우,최승혁,박우정,두영철,홍경순,오동진,이영 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.4

Virus 에 감염된 대추나무의 이병엽과 (罹炳葉) 건전엽에 (健全葉) 있어서의 유리 (遊離) amino 산의 정성적 비교

홍순우(Soon Woo Hong),하영칠(Yung Chil Hah) 한국식물학회 1961 Journal of Plant Biology Vol.4 No.1

Hong, Soon-Wooe and Yung-Chil, Hah (Dept. of Botany, Seoul National University, Seoul, Kerea.) A compantive investigation of free amino acids in healthy and virus diseased Chinese date tree. Kor. Jour. Bot. 4 (1)9~12 1961 : A comparative investigation of free amino acids content in healthy check and virus diseased leaves of Chinese date tree, Zizyphus jujuqa Mill var. inermis Rhed, was carried out by authors throughout the growing season of 1959 and 1960 from June to October. The methods of qualitative analysis of free amino acids applied in this experiment is followed by Moore and Stein.^(1.2). free amino acids determined in this experiment are shown in Fig. 1 and Table 1. As the figure and the table are shown, three more amino acids such as glutarmine, asparagine and histidine are detected in the diseased material. The additiolal amino acids which are known as diamines in diseased leaves are conspicuous. It is presumed that the diamine might be increased by the self-reproduoion of the virus in cooporation with certain enzymes which are carrying out the protein metabolism in the host protoplast in contrast with the healthy checks which is carrying out normal protein metabolism,^(3.4.5). From the histological point of view, the facts of phloem degeneration or necrosis in diseased leaves, it seems to interrupt to move free amino acids from roots to leaves and it possibly takes place an excessive productitn of NH_3 which is diaminated by the metabolism of nitrogen compounds in such conditioned leaves.^(6.8) Therefore, it is also presumed that additional diamino acids are accumulated in diseased leaves. There are no change of amino acids in both materials of this plant throughout the growing season qualitatively, and this result agrees with the paper of Knight.^9

韓國兒童 蒙古斑의 統計的 考察

禹榮根 醫藥係社 1957 綜合 醫學 Vol.2 No.9

남녀 유아의 체격과 체력과의 상관 : 유아스포츠단 6세를 중심으로

이정우,김영훈 한국유아체육학회 2003 한국유아체육학회지 Vol.4 No.-

본 연구는 경남 스포츠 아카테미 유아스포츠단에 입단한 6세(만 4년 4개월 ∼ 5년 : 3월 기준) 남녀를 대상으로, 체격에서 2개 항목과 체력에서 5개 종목을 측정하여 체격과 체력의 성적을 남녀별로 분석하고 상관관계를 알아 본 결과는 다음과 같다. 1. 신장과 체력과의 상관관계에서 남자는 3월에 25M 달리기(- .294)에서 약간 상관이 있었으며, 11월에 25M 달리기( .377), 윗몸 일으키기( .309)에서 약간 상관이 있었다. 여자는 3월에 25M 달리기(- .625) 한발 중심잡기(- .531), 제자리멀리뛰기( .684), V자 앉기(- .480)에서 확실한 상관이 있었으며, 11월에 25M 달리기(- .412), V앉기(- .313)에서 약간 상관이 있었다. 2. 체중과 체력과의 상관관계에서 남자는 3월에 25M 달리기(- .301), 윗몸 일으키기(. 312), V자 앉기( .331)에서 약간 상관이 있었으며, 11월에 한발 중심잡기( .306)에서 약간 상관이 있었다. 여자는 3월에 25M 달리기(- .491), 한발 중심잡기( .434), 제자리멀리뛰기( .472), V자 앉기(- .452)에서 확실한 상관이 있었으며, 11월에 한발 중심잡기(- .409), 윗몸 일으키기(- .474) V자 앉기(- .621)에서 확실한 상관이 있었다. Selecting, at my option, 44 male children and 33 female children at Kyung-nam Sports Academy kindergarten sports club in Chang-won city. I conducted a survey into correlation between 2 items of physique and 5 items of physical strength. And the results are as follow : 1. On height of physique male children' height show 3.33cm increase as average 101.70cm in March to average 111.03mn in November, whereas female children' height show 4.43cm increase as average 103.70cm in March to average 108.13cm. It means that female's growth is faster than male's one. 2. On weight of physique male children' weight show 1.73kg increase as average 18.68kg in March to average 20.41 in November. Whereas female children' weight show 1.73kg increase as average 17.91kg in March to average 19.64kg in November. 3. On physical strength, male children made an excellent 25m run, sit-ups, standing broad jump, V-form sitting, but female children made an excellent foot balance. 4. On correlation between height and physical strength for male children 25m run(.294) in March and 25m run(.377), sit-ups(.309) in November have a little correlation. For female children, in March 25m run(-.626), foot balance(-.531), standing long jump(.684), V form-sit(-.480) have a distinctive correlation whereas in November 25m run(-.412) and V form-sit (-.313) have a little correlation. 5. On correlation between weight and physical strength for male children 25m run(-.301), sit-ups(.312), V form-sit(.331) in March have a little correlation and foot balance(.306) in November have a little correlation. For female children, 25m run(-.491), foot balance(.434), standing long jump(.472), V form-sit(-.452) in March have a distinctive correlation, also foot balance(-.409), sit-ups(.47), V4 form-sit (-.621) in November have a little correlation.

후흉부 유도 V_(7-9)을 이용한 후벽 심근 경색증의 심전도적 진단 : 연령에 따른 차이 Differences by Age

신영우 대한노인병학회 2002 대한노인병학회지 Vol.6 No.4

生産性을 考慮한 切削加工에 對한 最適切削條件의 自動選定에 關한 硏究

李吉雨,金泳祥 홍익대학교 산업기술연구소 1996 産業技術 Vol.6 No.-

In recent years machining turns to flexible manufacturing. Industry in machining requires to increase machining productivity and to reduce costs. To adapt this trend it is necessary to optimize machining condition Even though many researches in this are introduced various way to set the optimal condition, still there are not enough. Therefore this research was done to select the optimal cutting condition for industry, and to develope the computer program to select the optimal cutting condition automatically. Also, this program was applied to many companies, and compare costs per minute. The results of this research will contribute to increase machining productivity of various companies with the automatic selection of optimal cutting condition.

Denis B 형 방출성 골절의 단 이식골을 사용한 전방 유합술시 단 분절 척추경 나사못 고정과 장 분절 척추경 나사못 고정

정영기,김석우 대한척추외과학회 1998 대한척추외과학회지 Vol.5 No.2

Study design : The operative treatment methods of twenty-one patients with Denis type B burst fractures were evaluated according to the level of pedicle screw fixation. Objective : To compare the results of short segment pedicle screw fixation with long segment pedicle screw fixation in Denis type B burst fractures treated anteriorly with short bone graft. Summary of Back ground data : Relatively good results(Short fusion time, good union rate, less loss of lordosis postoperatively etc.) were obtained in long segment fixation group during follow-up period. Methods : Twenty-one patients with Denis B type burst fractures of thoracolumbar and lumbar spine were divided into two groups depend on the level of pedicle screw fixation in operative treatment methods ; one group consisted of 10 cases which were treated by posterior short segment pedicle screw fixation and anterior interbody fusion with short bone graft(Group I : one level above and below posteior pedicle screw fixation of the fracture site and upper end plate of fracture site was fused with autogenous iliac bone or rib to adjacent vertebral body anteriorly through involved disc space) and the other groups consisted of 11 cases which were treated by posterior long segment pedicle screw fixation and anterior interbody fusion with short bone graft (Group II : more than two level above and below posterior pedicle screw fixation of the fracture site and additionally, anterior interbody fusion with short bone graft performed same as Group Ⅰ). Bony union rate, union period, changes of height of bone and disc, kyphotic angle loss, interscrew angle and complications were measured using pre-, post-operative and follow-up radiographs and chart review. Results : Comparing the two groups, there were no significant postoperative and follow-up results in both groups, especially, change of body & disc height, change of kyphotic angle and change of interscrew angle. However, relatively short fusion time, good union rate, less kyphotic angle loss, and low complication rates were obtained and maintained during follow-up period in long segment fixation group(Group Ⅱ). Conclusions : Long segment pedicle screw fixation and anterior interbody fusion with short bone graft group could effectively treat Denis B type burst fractures of thoracolumbar & lumbar spine and maintain their postoperative results during follow up peroid.

돼지감자에 있어서 系統別 栽植距離와 主莖切斷詩期가 生育 및 收量에 미치는 影響

高永友,吳現道,朴昌奎 濟州大學校 亞熱帶農業硏究所 1987 亞熱帶農業硏究 Vol.4 No.-

돼지감자의 系統別 栽植距離와 主莖切斷時期를 달리하여 生育, 收量 및 糖含量의 變化를 調査하였다. 그 結果를 要約하면 다음과 같다. 白色種보다 赤色種이 株當 塊莖數가 顯著히 많았으며, 塊莖數量도 많았고, 塊莖의 크기도 컸다. 疎植하였을때에 比하여 密植하였을 경우 10a當 地上部와 塊莖收量은 增加하는 傾向이었다. 二系統에 있어서 株當 塊莖種은 草長, 莖直徑, 莖當 節數, 株當 分枝長, 地上部 收量, 株當 塊莖 乾物重과 相關關係가 있었다. 株當 塊莖數는 白色種에서 다른 形質과 有意的인 相關關係는 없었으나 赤色種에서는 다른 形質과 有意的인 相關이 있었다. 主莖切斷時期에 있어서 切斷區에 比해서 無切斷區가 地上部와 塊莖收量이 많았으며, 切斷時期가 이를 수록 약간 增收하는 傾向을 보였다. 白色種이 赤色種보다 糖含量이 높았으며 收穫時期別 糖含量이 變化는 거의 없었다. 貯藏中의 糖含量이 變化는 貯藏期間에 따라 거의 變化 없었으며, 長期間 貯藏이 可能하였다. Field experiment was conducted to determine the effects of spacing in row and main stem cutting date on growth and yield of Jerusalem artichoke. Investigated were also the effects of harvesting date and storage period on sugar content of tuber. The results obtained are as follows; The red line had more tubers per plant and smaller tuber than the white line but the white had more tuber yields than the red line. Top and tuber yield of two lines increased with decreasing spacing in row. Fresh weight of tuber per plant correlated with plant length, diameter of stem, number of nodes per stem, length of branch per plant, fresh and dry weight of top per plant and dry weight of tubers per plant in two lines. Significant correlations between the number of tubers per plant and the other characters were observed in the red lines but were not in the white lines. Top and tuber yield of two lines were decreased by main stem cutting dates and tended to decrease with delaying cutting date of main stems. The white line had a higher sugar content than the red line. Sugar content of two lines was not affected by harvesting date. There was almost no change of sugar content during the storage period indicating that storage of tuber for a long time is possible.

용융염으로 합성한 PN계 압전세라믹스의 특성

金泳祥,李吉雨 홍익대학교 산업기술연구소 1998 産業技術 Vol.8 No.-

The effects of additives such as La203, Nd203 and Sm203 on the phase stability microstructure, and electrical properties of the PbNb206 synthesized by molten salt(KCl and NaCI) method and solid state reaction were investigated. The results showed that small amounts of additives affected normal grain growth, i.e. inhibition of abnormal grain growth. The variations of Pbo/Nb205 ratio resulted in pillar and plate shaped find particles. The electromechanical coupling and mechanical quality coefficient of the lead metaniobate containing 3 mol% Nd203 were 0.13 and 75.0 respectively.