한강 인도교지점에서의 이상홍수 해석

조원철,허준행,서규우,이원환 연세대학교 산업기술연구소 1994 논문집 Vol.26 No.1

The water level and flow rate data measured at Indogyo measurement point which serves as one of the major measuring points of Han River have been very important in aspect of controlling the flow. Because these data are becoming more and more unreliable due to the recent change in the basin or the narrowing of the river width, these data will be standardized by comparing the recent data of Indogyo measuring point with the past those. To minimize the errors of water level-flow rate curve caused by the yearly changes of basin, the standard water level-flow rate curve with respect to the present basin conditions will be set, and calculated reduced water level will be compared with the past data. And through frequency analysis, frequency-based flood level with respect to return period will be presented. Finally, the total flow rate of the flood measured in September, 1990 at the point of Indogyo measuring point will be compared with the total flow of the past extreme floods.

사지의 주요 동맥손상의 처치: 23증례에 대한 분석

원형섭,김상은,배성만,박철완,이 근,조상훈,김상일,우병완 大韓應急醫學會 1996 대한응급의학회지 Vol.7 No.1

Extremity vascular trauma is common in most emergency centers, and controversy remains about the optimal management of arterial injuries. Retrospectively we reviewed the records of 23 patients who had upper or lower extremity arterial trauma from July 1994 to December 1995. The purpose of this study was to evaluate our department`s management policy to major arterial injuries. The leading cause of major arterial injuries was penetrating trauma. We found that there were clinical findings such as absence of or decreased strength of pulsation(82.6%), cool ischemic extremity(69.6%), large expanding hematoma(43.5%), major bleeding(17.4%) and bruit or thill(8.7%). We gave the priority to management of life-threatening injuries and applied the pressure dressing to wounds as early as possible. There were 18 men(78.3%) and 5 women(21.7%); the mean age was 35(range 20-56 years old) years. There were 12 arterial injuries(52.2%) in the upper extremity and 11 arterial injuries(47.8%) in the lower exteremity. The most commonly injured artery was the brachial artery in the upper(34.8%) and the femoral artery in the lower(30.4%) extremity. The etiology included knife stabbing in 10 patients(43.5%), motor vehicle accidents in 6(26.1%), industrial accidents in 4(17.4%), falls in 2(8.7%) and a farm equipment accident in 1 patient(4.3%). The associated injuries were muscle injuries(78.3%), fracture(56.5%), nerve injuries(52.2%), vein injuries(43.5%), shock(17.4%) and dislocation(13.0%). All patients with arterial injuries were given a preoperative prophylactic antibiotic and TIG(tetanus immunoglobulin). We used Doppler technique as a means of detecting the blood flow. Fourteen patients(60.9%) underwent preoperative arteriography in the radiology department. We performed surgical exploration as soon as major arterial injuries were suspected. The most common methods of treating major arterial injuries were interposition vein graft(69.6%) and end to end anastomosis(21.7%). Systemic or locally infused heparin was used for all vascular repairs. In many of our patients(56.5%), fasciotomy was performed before the vascular repair, as a part of the exploration of the distal arteries. There were 2 amputations(8.7%) but no death. The reason for secondary amputation were wound infection in one and failure to achieve sufficient arterial flow to the involved extremity with resulting gangrene in the other. As the time factor is vitally important in the management of arterial injuries, we advocate prompt and early surgical treatment within 6 hours of the trauma. In conclusion, we believe that the crucial factorsin successful management of major arterial injuries of the extremities are early diagnosis, prompt treatment, complete debridement, fasciotomy when indicated, and simultaneous treatment of concomitant injuries.

상부 조기 위암 환자의 복강경하 상부 위절제술 3례 경험

조규석,김형철,박경규,이문수,송옥평,임철완,신웅진,주종우,유기원 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Background : The reported incidence of early gastric cancer located in the upper portion of the stomach has been increasing with the recent advances in its diagnosis and screening. Recently, we have successfully performed laparoscopic assisted proximal gastrectomy and gastric tube reconstruction without pyloroplasty on three patients with early gastric carcinoma localized to the upper third of the stomach. We describe our modification of this procedure in this report. Method : After creating an surgical pneumoperitoneum, the stomach was mobilized using laparoscopic coagulating shears. Upper half of the greater curvature and three-quarters of the lesser curvature were then dissected along with regoinal D2 lymphadenectomy. This was followed by a 5 cm, longitudinal mini-laparotomy in the upper abdomen, and the construction of the exteriorized stomach with a gastric tube measuring 20 cm long and 4 cm wide. Reconstruction with an esophagogastrostomy was performed using a circular stapler. Result : No post-operative morbidity or mortality was observed in this small series of patients. The average operative time was 250 minutes (range 220-300 minutes), and the average blood loss was 150 ml (range 90-180 ml). The mean number of lymph nodes harvested during these laparoscopic proximal gastrectomies was 24 nodes (range 22-25 lymph nodes). The average postoperative hospital stays was 7.5 days (range 7-8 days). Conclusion : Our technique of laparoscopic assisted proximal gastrectomy and gastric tube reconstruction without phloroplasty offers a minimally invasive technique with the potential of impoving the post-operative quality of life patients with an early-stage proximal gastric cancer.

흐름 計算의 數値 積分法에 관한 硏究

조원철,李元煥,송재우 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1

A simple rapidly converging iterative method of computing gradually varied steady flow profiles in open channels of any shape, prismatic or nonprismatic, is presented. The method is also applicable to spatially varied steady flow. It is not necessary to determine the shape of the expected profile or the type of flow in advance to proceed with the solution. Computations can proceed either upstream or downstream, regardless of the type of flow, once the channel, discharge, and the initial depth of flow are specified. The procedure for hand computation is illustrated by an example and a FORTRAN program is given.

3분과 : 가선집재작업에서의 작업 생산성 및 비용 분석

한원성 ( Won Sung Han ),한한섭 ( Han Sup Han ),김남훈 ( Nam Hun Kim ),차두송 ( Du Song Chu ),조구현 ( Koo Hyun Cho ),민도홍 ( Do Hong Min ),권기철 ( Ki Cheol Kwon ) 한국임학회 2014 한국산림과학회지 Vol.103 No.1

본 연구에서는 임목수확작업에 사용되는 집재기계의 작업효율성을 분석하여 경사가 급한(20° 이상) 작업조건에 적합한 가선계 집재기계를 선정하는데 기초 정보를 제공하고자, 타워야더(RME-300T), 트랙터부착형 집재기(일명: 춘천집재기), 트랙터윈치(FARMI) 등에 의한 집재작업에서의 작업생산성 및 비용을 비교 분석하였다. 평균 흉고직경이 20 cm, 집재거리 60 m, 가로집재거리 10 m, 그리고 기계이용률이 70%인 동일한 작업 조건에서 작업이 이루어질 경우, 타워야더의 1일 집재작업 생산성은 33.04 m3/일, 트랙터부착형 집재기는 38.47 m3/일, 그리고 트랙터윈치는 14.17 m3/일으로 분석되었으며, 이에 따른 집재작업비용은 각각 25,105원/m3, 20,520원/m3, 37,835원/m3으로 나타났다. 동일한 작업조건에서 집재거리에 따른 각 집재기계별 작업효율성을 비교하였을 경우, 집재거리가 40 m 이내로 짧을 경우에는 트랙터윈치에 의한 집재작업이 효율적이며, 40~140 m의 집재거리에서는 춘천집재기가, 140 m 이상의 장거리 집재작업에서는 타워야더가 가장 효율적인 것으로 나타났다. This study was conducted to provide field-based harvesting study information which can be used to select an optimal cable system for certain work conditions on steep grounds (>20° ground slope) in Korea. Toaccomplish this study objectives, we evaluated three cable yarding systems (RME-300T tower-yarder, Chuncheontower-yarder, FARMI tractor winch) working in typical work conditions for their yarding productivity and operational efficiency. Those yarders are commonly used for removing logs or trees on steep grounds in Korea. Under the same work conditions (average DBH of tree to be cut, 20 cm; yarding distance, 60 m; lateral yardingdistance, 10 m; and machine utilization rate, 70%), the average productivities were 33.04 m3/day, 38.47 m3/day, and 14.17 m3/day for RME-300T, Chuncheon tower-yarder, and FARMI, respectively. Our standardized cost comparison study also showed that the yarding cost was highest at 37,835 won/m3 with FARMI, followed byRME-300T at 25,105 won/m3 for the same work conditions. We found the lowest yarding cost with the Chuncheon tower-yarder at 20,520 won/m3 which was resulted primarily from high yarding productivity at theyarding distance (60 m). Our analysis suggested that a small machine such as FARMI could be a low-costyarding machine option for a cable yarding job with a short yarding distance (40 m or less). The Chuncheontower-yarder is well suited for a mid-range yarding distance job in Korea, ranged between 40 to 140 m. Ifyarding distance were longer than 140 m, the RME-300T tower yarder appears to be most cost-effective.

사지의 급성동맥 색전증에 대한 응급동맥 색전제거술

박철완,원형섭,박정배,이근,조상훈,표창해,김상일 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

Acute arterial occlusion of the extremities is often a surgical emergency and is due mostly to arterial embolus. It has infrequently been reported in the emergency department. Cardiac embolism is most commonly the result of atrial fibrillation secondary to valvular heart disease followed by ischemic heart disease. The emergency arterial embolectomy by Fogarty balloon catheter works well when the cause of occlusion is cardiac embolus obstructing normal vessels in a patient with valvular heart disease. Recently we met some patients with acute critical ischemia of the extremities due to arterial emboli in our emergency department. On physical examination, they all had symptoms of 5"P"s(pain, pallor, pulselessness, paresthesia, paralysis). After emergency arterial embolect omy, immediate improvement was observed in all patients. They were discharged within 1 week. We report our experiences with the review of literatures.

적십자간호사업의 역사적 고찰

양원영,강윤숙,이옥철,조인재 적십자간호전문대학 2000 적십자간호전문대학논문집 Vol.22 No.-

Productivity Loss of Rheumatoid Arthritis Patients according to the Their Stages of the Disease Activity Score

( Sang-Cheol Bae ),( Jin-Hye Cha ),( Jung-Yoon Choe ),( Sung Jae Choi ),( Soo-Kyung Cho ),( Won-Tae Chung ),( Chung-Il Joung ),( Young-Ok Jung ),( Young Mo Kang ),( Dong-Wook Kim ),( Jinseok Kim ),( Y 대한류마티스학회 2018 대한류마티스학회지 Vol.25 No.2

Objective. Productivity loss was compared by 3-stage of disease activity and associations between higher disease activity and high productivity loss were identified. Methods. Data were extracted from Rheumatoid Arthritis (RA) Patient-reported Outcomes Research, which enrolled 2,000 RA patients (>20-year) on disease-modifying-antirheumatic-drugs (DMARDs) (≥ 6-month) from December 2012 to June 2013. This included 1,457 RA patients with the disease activity score (DAS-28-ESR) in their medical charts. Productivity loss in time and indirect cost was estimated using The World Health Organization Health and Work Performance Questionnaire (HPQ). Baseline characteristics and productivity loss outcomes were compared according to DAS-28-ESR groups. Results. 84.4% were females, 54.2% had low DAS-28-ESR (<3.2), and 38.2% and 7.6% had moderate (3.2∼5.1) and high DAS-28-ESR (>5.1). Patients with moderate to high DAS-28-ESR had higher lost productivity time (LPT) and monthly costs of LPT than those with low DAS-28-ESR (time in hours: 110.0±58.4 vs. 132.4±57.2 vs. 71.5±52.0, p<0.0001; monthly costs of LPT in 1,000 Korean won: 1,097±607 vs. 1,302±554 vs. 741±531, p<0.0001). Multiple regression analyses revealed significant associations with high LPT in high (adjusted odds ratio [OR]=3.87, 95% confidence interval [CI]: 2.18∼6.87) and moderate DAS-28-ESR (adjusted OR=1.88, 95% CI: 1.41∼2.52) compared to low DAS-28-ESR. In addition, positive associations with high monthly costs of LPT were observed in high (adjusted OR=3.45, 95% CI: 1.98∼5.99) and moderate DAS-28-ESR (adjusted OR=1.93, 95% CI: 1.43∼2.54) compared to low DAS-28-ESR. Conclusion. Timely therapeutic strategies should be taken into consideration given that the RA patients with moderate to high DAS-28-ESR showed strong associations with high productivity loss for effective management of RA. (J Rheum Dis 2018;25:122-130)

대기오염지역과 청청지역의 초등학생 폐기능 검사에 관한 연구

김윤신,이철민,조용성,최원욱 한양대학교 환경및산업의학연구소 2000 環境과 産業醫學 Vol.9 No.1

During July 1996, Junejuly 1997, a pilot study to investigate effects of air pollution on school children's health was undertaken in polluted areas and a clean area, Korea. To examine the pulmonaly function of 790 boys and girls from selected four elelmentary schools in Yechon, Ulsan, and Sokcho, respectively, a standard respiratory questionnaire was administered and pulmonary function tests were performed. There was a significant difference in the level and criteria of impediment-scale of pulmonafy function(FEV1.0 and FVC) between exposed groups to polluted area and clean area. The surveyed prevalence of major diseases and past histoly of major diseases was shown higher response rate in polluted area than non-polluted area. The additional longitudinal study that carefully monitors air pollutants and health data should be conducted to confirm these results. Key Words : Health effect, Air pollution, Pulmonary function test(PFT)

항진균제 알릴아민류의 합성과 생물학적 평가

정병호,조원제,천승훈,박면지,유진철,천문우 朝鮮大學校 1998 藥學硏究誌 Vol.19 No.2

For the development of antifungal agents. modification of naftifine which exhibits significant antimycotic activity was performed by replacing the naphthalene ring of it to hetero cyclic rings such as morpholine. benzothiazole. piperidine and pyridine derivatives. The synthesized compounds were tested in vitro antifungal activity against five different fungi with naftifine as a comparative antimycotic molecule. From the biological evaluation two compounds. (E)-N-(3-phenyl-2-propenyl)-N-(4-piperidinylmethyl)amine(3d) and (E)-N-(3-phenyl-2-propenyl)-N-(3-pyndylmethyl)amine(3D) showed relatively noticeable activity(MIC=50㎍/㎖). On the other hand. the other compounds had no activity.