일반 섬유 및 폐섬유의 혼입률에 따른 시멘트경화체의 강도특성에 관한 실험적 연구

유명화,정재동 대구대학교 산업기술연구소 2008 産業技術硏究 Vol.19 No.-

Now a days,structureshavebeen changed into biggerand morediversify with rapidly increased industry. Concrete which is used by industrial material and structural material has defect of short with tensile strength and bending strength. Because of these defects, a lot of effort of improvement of liquidity, tensile strength and bending strength has been tested since long ago. Now, Fiber Reinforced Concrete(F.R.C) comes into the spotlight. Therefore, it has been done to examine dynamics quality of material with mixing general fiber and recycling waste fiber.

생활체육의 발전과정과 전망

송명섭,유재광 충주대학교 학생생활연구소 2000 學生生活硏究 Vol.7 No.-

가솔린 화재의 소화를 위한 수분무의 특성에 관한 실험적 연구

장용재,김명배,김유 (社)韓國火災 ·消防學會 1995 한국화재소방학회논문지 Vol.9 No.2

This study discribes characteristics of water spray for extinguishment of gasoline fire. Experiments are carried out for the gasoline pool fire with the atomizing nozzles. Droplet size, spray pressure, amount of water which reaches the flame base and velocity of water spray are measured to find extinguishment conditions. Air entramment due to the water spray and extinguishing process of gasoline fire by water spray are visualized. Boundary conditions of water spray for extinguishment of gasoline pool fire is quantitatively shown. As the result of experiments, it is found that the velocity of entrainment air and sprayed water are almost same and the water droplets size having small diameter under 40㎛ can not extinguish the fire because too small droplets does not reach the fuel surface.

Small Cell Lung Cancer Cell Line을 이용한 Xenoplanted nude mice에서 방서선 치료후 종양의 변화 관찰에 관한 연구

김동욱,유명상,김재욱,이병돈,장혁순 순천향의학연구소 2002 Journal of Soonchunhyang Medical Science Vol.8 No.1

Recently, combination of ionizing radiation with inhibitors of angiogenesis has been reported to improve tumor eradication compared to treatment with irradiation alone. However, the mechanism of this effect have not been defined. For this pupose we established a non-small cell lung cancer model in nude mice. Tumor vascularization was visualized in vivo by MRI using gadolinium-DTPA as contrast agent. Further, cryosections were produced exactly in the MRI slice positions. Since we were interested to examine formation of recurrent tumor irradiation was performed with a single fraction of 6 Gy. This dose caused a partial remission followed by recurrent tumor growth 25 to 35 days after therapy. The process of partial remission as well as formation of the recurrent tumor was examined in 35 nude mice analysing the following parameters: (1) contrast agent enhancement using high-resolution MRI, (2) proliferation of tumor cells and fibroblast using Ki-67 immunohistochemistry, (3) formation of microvessels using CD31 immunohistochemistry. The latter analyses lead to differentiation of three stages. Stage 1(day 1 to 15 after irradiation) was characterized by increasing area of dead cell mass in hematoxylin-eosin stained slides that corresponded to a decrease in tumor cellproliferation as well as contrast agent enhancement. The percentage of Ki-67 positive tumor cells decreased from initially 45.1 ±6.0 to 1.4 %±1.2 % on day 15. Stage 2(days 6 to 20 after irradiation; overlapping with stage 1) was characterized by proliferation of fibroblast leading to formation of fibrotic septae with abundant microvessels. Already during late stage 2 MRI identified new contrast agent enhancing areas. Stage 3(day 20 to 40 after irradiation) was characterized by new tumor cell proliferation. Interestingly, tumor cells almost exclusively proliferated in the direct neighbourhood of the fibroblasts and blood vessels was a condition prior to foramtion of recurrent tumor tissue. Thus our results are in contrast with the view that tumors or recurrent tumors begin as avascular masses that later induce neovascularization. With respect to clinical practice our results suggest that (1) adjuvant anti-angiogenic therapy should not be limited to the day of irradiation but should cover a critical period until day 5 to day 20 after radiotherapy, (2) adjuvant therapy should also include inhibition of fibroblast proliferation, (3) MRI can identify a recurrent tumor 10 to 15 days before occurrence of new tumor growth.

부비동 악성 종양의 임상적 분석

백병준,유명상,신재민,김효진,박훈,김장묵,오천환 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.2

Background and Objectives : Paranasal sinus cancer is rare when compared with cancers of other sites. Because paranasal sinus is anatomically located adjacent to the orbit and skull base, it is difficult to remove the tumor completely with tumor free margin in advanced paranasal sinus cancer. This report was conducted to investigate clinical characteristics, histologic type and treatment outcome of paranasal sinus cancer. Material and Methods : Twenty-six cases with paranasal sinus cancer diagnosed at the Department of otolaryngology-Head and Neck Surgery, Soonchunhyang Cheonan Hospital from January 1991 to September 2000 were studied by chart review, telephone interview and letters retrospectively. Results : The male to female ratio was 4.2 : 1. Most patients were 6th and 7th decade. The maxillary sinus was the most commonly affected site(61.5%), followed by the ethmoid sinus(34.6%). The most common histologic type of malignancy was squamous cell carcinoma(57.6%), followed by adenocarcinoma(19.2%). Most patients presented with T_(3)/T_(4) or locally advanced disease, N_(0)(91.3%), and M_(0)(100%) Sixtynine pertcent of this study group underwent sugery as part of a mutimodality curative treatment plan or alone as curative treatment. Eighteen patients(69.2%) developed recurrent disease at a median time of 278 days after initial treatment. Kaplan-Meier analysis revealed the 5-year disease specific survival was 34.6%. Conclusion : Most patients with paranasal sinus cancer presented with locally advanced disease. Adanced T stage was highly predictive of poor prognosis. Recurrence rate was high and mostly occured within the second year after treatment.

GPS 활용을 위한 좌표변환 매개변수 결정에 關한 硏究 : 가평군을 중심으로

양인태,김재철,유영걸,오명진 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.A

The previous control point surveying. being standardized by trigonometric point which hasn't: been unified in the whole country and producing put into operation through complex calculation process, has many- problems about accurate results and economic side. Because most of trigonometric points that standardize a present surveying are in situation in top of the mountain, there are man)- difficulties in solving sight problems. Since trigonometric points are far away from one another, Differences are created because of limitation of point distance. observatory network construction and distribution of error In the information age. the study about acquiring three dimension surveying information that uses GPS has been processed as fast as acquiring topography information is getting important gradually. For utilizing GPS in surveying work. deciding transformation 7-Parameters that changes data about location information which is received by GPS receiver is important. In this study-. It is decided transformation 7-Parameters that can be used in ka-pyoung area by using GPS sun-el-ing production that had put into operation.

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

Adequate time of initiation of continuous infusion of nitroglycerin for controlling pulmonary arterial pressure during ethanol embolotherapy of congenital arteriovenous malformation of extremities

Jae-Myung Yu,Byung-Seop Shin,Burn Young Heo,Young-Gon Son 대한마취통증의학회 2013 Korean Journal of Anesthesiology Vol.65 No.6

Functional Gastrointestinal Disorders Diagnosed by Rome 3 Questionnaire in Korea

( Jae Myung Park ),( Myung Gyu Choi ),( Yu Kyung Cho ),( In Seok Lee ),( Jin Il Kim ),( Sang Woo Kim ),( In Sik Chung ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2011 Journal of Neurogastroenterology and Motility (JNM Vol.17 No.3

Background/Aims Rome criteria classifying functional gastrointestinal disorder (FGID) were updated. The aims of this study were to assess the spectra of FGID and to evaluate the applicability of Rome III criteria in Korea. Methods New patients who visited 2 primary clinics and 2 tertiary care hospitals were consecutively invited to complete questionnaires. These consisted of questionnaires for FGID based on Rome III criteria and symptom checklist-90-revised for somatization, depression and anxiety. Results A total of 786 patients was participated. Among them, FGID was observed in 49.7%. In the patients with FGID, functional dyspepsia was most common (46.0%) followed by irritable bowel syndrome (IBS, 40.2%). Functional dyspepsia was most com - mon both in the primary care clinics and tertiary care hospitals. Postprandial distress syndrome was the most common subtype and the frequency of epigastric pain syndrome was low. There were few responders for constipation as Bristol types 1 and 2 and for diarrhea as types 6 and 7 in subtype classification using the Bristol Stool Form Scale. Thereby, unspecified IBS defined by stool form was unexpectedly common in 43.9% of IBS, whereas unspedified IBS defined by Rome III definition was 5.1%. Patients with overlap FGIDs had higher score of anxiety, depression or somatization. Conclusions FGIDs were common both in primary care clinics and tertiary care hospitals of Korea. Overlap FGIDs is still common by Rome III criteria, which may limits its wide application.

National Endoscopy Quality Improvement Program Remains Suboptimal in Korea

( Jae Myung Cha ),( Jeong Seop Moon ),( Il-kwun Chung ),( Jin-oh Kim ),( Jong Pil Im ),( Yu Kyung Cho ),( Hyun Gun Kim ),( Sang Kil Lee ),( Hang Lak Lee ),( Jae Young Jang ),( Eun Sun Kim ),( Yunho Ju 대한간학회 2016 Gut and Liver Vol.10 No.5

Background/Aims: We evaluated the characteristics of the National Cancer Screening Program (NCSP) and opinions regarding the National Endoscopy Quality Improvement Program (NEQIP). Methods: We surveyed physicians performing esophagogastroduodenoscopy and/or colonoscopy screenings as part of the NCSP via e-mail between July and August in 2015. The 32-item survey instrument included endoscopic capacity, sedation, and reprocessing of endoscopes as well as opinions regarding the NEQIP. Results: A total of 507 respondents were analyzed after the exclusion of 40 incomplete answers. Under the current capacity of the NCSP, the typical waiting time for screening endoscopy was less than 4 weeks in more than 90% of endoscopy units. Performance of endoscopy reprocessing was suboptimal, with 28% of respondents using unapproved disinfectants or not knowing the main ingredient of their disinfectants and 15% to 17% of respondents not following reprocessing protocols. Agreement with the NEQIP was optimal, because only 5.7% of respondents did not agree with NEQIP; however, familiarity with the NEQIP was suboptimal, because only 37.3% of respondents were familiar with the NEQIP criteria. Conclusions: The NEQIP remains suboptimal in Korea. Given the suboptimal performance of endoscopy reprocessing and low familiarity with the NEQIP, improved quality in endoscopy reprocessing and better understanding of the NEQIP should be emphasized in Korea. (Gut Liver 2016;10:699-705)