안트라사이트 여과층의 역세척에서 초기 유동화에 관한 연구

이재복,임성진,김의재 慶星大學校 環境問題硏究所 1998 環境硏報 Vol.8 No.1

Filtration is an essential unit process which are used not only to supply clean water but also to treat wastewater by physicochemical methods. Espoecially, the importance of granular filters is growing during the last two decades. While the filtration goes on, the medias. Especially, the importance of granular filters is growing during the last two decades. While the filtration goes on, the media removes suspended solids in the pore or on the surface of it, and then increased the pressure loss of the filter media are increasing, The bockwashing process is the most widely used method in which the washwater flows with high velocity. The objective of this study is to examine existing theoretical equation in relation to the washing efficiency of backwashing in multi-layer filter. And the bench scale experiment was performed for the comparison of the empirical and theoretical studies. By the results of the experimental data, the minimum fluidization velocity is 69.4m/hr and the porosity of the anthracite bed is 0.2043 in incipient fluidized stage, and it is investigated the property of various theoretical equation using in the minimum fluidized stage, and it is investigated the property of various theoretical equation using in the minimum fluidizing stage. After obtained the minimum fluidizing velocity from the experimental data, minimum fluidized velocity replaced 0.4 and was defined as the Ergun's equation for coarse particle than applied equation of the Kozeny-Carman for fine particles. The fluidization of the column begin at 1 which is the ratio of fluidzing velocity and pressure loss. When the superficial velocity is about 4, the fluidization comes from appearance of the minimum fluidization and it showed to reach 11.8 of the maximum pressure loss through fluidization. Until the incipient fluidization displayed, the pressure drop and the superficial fluidizing velocity was found linear as fluidizing velocity increased. The experimental result affirms the correspondency to Darcy's law which describes the flow of fluid at porous media.

장중첩증을 동반한 맹장 지방종 1예

홍의실,나병규,김민옥,유일영,채지영,채희복,윤세진,이상전,송형근,박길선,정현용 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.2

대장 지방종은 주로 우측 결장에 호발하고 특히 회맹판 부위와 맹장 부위에 호발한다. 또한 50~60대에 빈도가 높고 증상이 있는 환자에서 장중첩증이 높게는 40~50%에서 보고되고 있어 성인 장중첩증의 원인으로 중요한 비중을 차지한다. 특히 성인 장중첩증 및 장폐쇄의 중요 원인인 악성 종양과 임상 양상이 유사하여 감별진단이 중요하다. 저자들은 반복적인 복통을 주소로 내원한 환자에서 맹장의 4×5㎝의 점막하 지방종이 말단 회장부위와 반복적인 장중첩중이 발생했던 1례를 부분 절제술로 치료하여 양호한 임상 경과를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Lipomas are one of the most common benign nonepithelial tumors of the colon which are often detected incidentally by radiologic investigation or on operation. These tumors are usually without specific symptoms. Colonic lipomas occur most often in the right colon, particularly in the ileocecal valve and the cecum. Most patients are asymptomatic. but tumors larger than 2 cm tend to produce a change in bowel habit. abdominal pain. rectorrhagia and complications including luminal obstruction or intestinal intussusception. Diagnosis can be made by colonoscopy abdominal CT. MRI, or barium enema. We report a case of lipoma of the cecum that originated in the submucosa and presented as a intussusception in a 50-year-old woman with a brief review of the literature.

태아 26예에서 신장단위의 미세구조적 발달

김혜영,주의탁,김경용,이원복 대한해부학회 1995 Anatomy & Cell Biology Vol.28 No.2

쥐치아 치근면의 치주인대세포의 활성도를 평가하는 방법으로 MTT검색법의 적절성에 대한 조직학적인 검증

김현기,김의성,최인복,김진,이승종 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.5

The purpose of this study is to examine the viability of PDL cells in rat molars by using MTT assay and to verify the MTT assay through the histologic observation. Thirty of Sprague Dawley white female rats of 4 weeks old with a body weight of about 100 grams were used. Groupings are as follows : Immediate Group : Positive control group(n=10) after extraction immediately. Dried Group : Negative control group(n=10) after drying for an hour under warm dry. ViaSpan Group : 1hour ViaSpan group(n=10) after storing in ViaSpan at 4℃ for 1hour. Ten teeth of each group were treated as same as above and replanted to the original socket of experimental animals. After two weeks of replantation. all the experimental animals were sacrificed. And after fixation, extracted maxillary jaw was dimineralized. After it was embedded in paraffin. serial section by ViaSpan was carried out and for construction of specimen, hematoxylin eosin dye was used. The mean MTT measurement of immediate group(positive control) is 2.81 and the mean measurement of dried group(negative control) is 0.98 which is significantt differnt(P<0.05), The mean measurement of ViaSpan group is 2.65 and there is significant difference between dried group and ViaSpan group(P<0.05), However, there is no difference between immediate group and ViaSpan group. The average resorption points of immediate group is 3.03 points. In the dried group, average 6.44 points resorption and 2.68 points showed resorption in the ViaSpan group. Unlike with MTT assay, there was no significant difference between the immediate group and ViaSpan group. The usage of MTT assay as a viable cell marker may give us a better indication of the maintenance of periodontal ligament cell vitality.

인천 월미공원 조경설계

장종수,임의제,이준복 한국전통조경학회 2003 한국전통조경학회지 Vol.21 No.2

This article is an abstract of the prize-winner master plan for Wolmee Park in Incheon, Korea. The main theme of the park is the revival of the Korean traditional garden style. The park provides a place for citizens to understand and experience Korean traditional garden styles by emphasizing Koreas traditional images and feelings. In addition, cultural traditions are harmonized with modern characteristics of the park. The plan includes restoring Wolmee-haenggung(a temporary palace used to be in Wolmee Island) to hold its traditional meaning as garden and plate of the Wolmee Island. Main design ideas are summarized below. First, the conceptual meaning of jeong-won(庭園, garden) is represented separately: jeong(庭) and won(園). Jeong(庭) is a man-made place and reappeared as tangible objects with traditional forms. In contrast, won(園) with the concept of wonrim(園林), the universal principle of Korean traditional garden style, which focuses on the harmony between human and nature, is symbolically represented as wolmeegugok(月尾九曲, nine beautiful landscapes along the river). Second, to deliver the meanings of the place, various historical and cultural elements of Wolmee Island are metaphorically added to the traditional garden frameworks. And third, the plan basically orients to preserve the ecologically healthy natural environment of Mt. Wolmee. The park will contribute for Incheon citizens as well as people nearby by providing healthy environment and various recreational activities.

Association of a RUNX2 Promoter Polymorphism with Bone Mineral Density in Postmenopausal Korean Women

Lee, Hee-Jung,Koh, Jung-Min,Hwang, Joo-Yeon,Choi, Kang-Yell,Lee, Seung Hun,Park, Eui Kyun,Kim, Tae-Ho,Han, Bok Ghee,Kim, Ghi Su,Kim, Shin-Yoon,Lee, Jong-Young Springer-Verlag 2009 Calcified tissue international Vol.84 No.6

Factors affecting waterproof efficiency of grouting in single rock fracture

Lee, Hang Bok,Oh, Tae-Min,Park, Eui-Seob,Lee, Jong-Won,Kim, Hyung-Mok Techno-Press 2017 Geomechanics & engineering Vol.12 No.5

Using a transparent fracture replica with aperture size and water-cement ratio (w/c), the factors affecting the penetration behavior of rock grouting were investigated through laboratory experiments. In addition, the waterproof efficiency was estimated by the reduction of water outflow through the fractures after the grout curing process. Penetration behavior shows that grout penetration patterns present similarly radial forms in all experimental cases; however, velocity of grout penetration showed clear differences according to the aperture sizes and water-cement ratio. It can be seen that the waterproof efficiency increased as the aperture size and w/c decreased. During grout injection or curing processes, air bubbles formed and bleeding occurred, both of which affected the waterproof ability of the grouting. These two phenomena can significantly prevent the successful performance of rock grouting in field-scale underground spaces, especially at deep depth conditions. Our research can provide a foundation for improving and optimizing the innovative techniques of rock grouting.

First detection of Influenza D virus infection in cattle and pigs in the Republic of Korea in 2022

Eui Hyeon Lim,Seong-In Lim,Min Ji Kim,MiJung Kwon,Min-Ji Kim,Kwan-Bok Lee,SeEun Choe,Dong-Jun Ahn,Bang-hun Hyun,Jee-Yong Park,You-Chan Bae,Hye-Young Jeoung,Kyung-Ki Lee,Yoon-Hee Lee 한국예방수의학회 2023 한국예방수의학회 학술대회자료집 Vol.2023 No.-

제 2 흉부교감신경 절단술과 Clip 을 이용한 교감신경 차단술이 술중 혈압 및 심박수 변화에 미치는 효과 비교

이윤우,이정복,신증수,김정열,이의운,이두연 대한마취과학회 2000 Korean Journal of Anesthesiology Vol.38 No.2

Backgroond : Thoracoscopic sympathicotomy was, at first, thought to be a simple and safe method for treatment of hyperhydrosis. However, the main disadvantage of this procedure is irreversibility in additions socalled rebound sweating occurred in 30 ―40% of patients during the first 1-2 weeks after operation. Some patients regret the surgery, even to the extend of preferring the original sweaty hands. Recently clipping has been suggested one of the way to minimize such problem. Hypothesis of this study was that sympathetic nerve block effect by clipping may be weak compared to sympathicotomy. The aim of this study was to evaluate and compare the sympathicotomy by clipping effect on cardio- vascular system. Methods : Sixty-five patients with essential hyperhydrosis in ASA physical status class 1 undergoing thoracoscopic sympathetic block were randomly divided into two groups: The Clipping group (N = 21) and the sympathicotomy (N =44) group. Anesthesia was induced with thiopental sodium (5 mg/kg) and pancunium (0.05 mg/kg) and maintained with enflurane. The operation was done to the left side first and the to the right by an experienced surgeon. During the procedure, we measured blood pressure using a non invasive technique at the right forearm, heart rate and temperature after anesthetic induction as baseline values, immediately after the left side resection of the T2 sympathetic trunk or clipping, and after completely both sides resection. All the records were coded and analysed single blind by one author. Results : After the T2 sympathicotomy, heart rate decreased from 87 .±14 to 76 ± 17 (P $lt; 0.05) and the mean blood pressure was reduced from 77 ± 14 to 64 ± 10 mmHg (P $lt; 0.05). After T2 clipping, heart rate decrease from 88 ± 18 to 73 + 14 (P $lt; 0.05) and mean blood pressure was reduced from 74 ± 12 to 67 ± 13 mmHg (P $lt; 0.05). Conclusion: The main result of this study was that there was no significant difference in sympathetic block effects on blood pressure and heart rate between clipping and sympaty during the procedure. (Korean J Anesthesiol 2000; 38: 296~300)

The Usefulness of a Colonoscopy with Biopsy in the Early and Accurate Diagnosis of Ischemic Colitis

( Eui Joong Kim ),( Soon Man Yoon ),( Sang Hwa Lee ),( Ki Bae Kim ),( Joo Young Lee ),( Dong Hwa Lee ),( Eun Bee Kim ),( Soonyoung Park ),( Joung Ho Han ),( Hee Bok Chae ),( Seon Mee Park ),( Sei Jin 대한장연구학회 2013 Intestinal Research Vol.11 No.2

Background/Aims: Ischemic colitis has a clinical spectrum ranging from mild reversible colitis to an acute fulminant course. Early and accurate diagnosis is therefore mandatory for a good clinical outcome. The aim of this study is to evaluate the efficacy and safety of a colonoscopy and histological examination with biopsy in the early and accurate diagnosis of ischemic colitis. Methods: We investigated the clinical characteristics and endoscopic findings with the histopathology of 89 cases of ischemic colitis from October 2002 to August 2012 in a tertiary-care hospital. All patients underwent a colonoscopy with biopsy within a few days of the onset of symptoms, and the histological features from the biopsy specimens were reviewed. In addition, the occurrence of complications by colonoscopy with biopsy was evaluated. Results: The mean age of the patients was 65.8±12.6 years (male:female, 1:2.2). The major combined disorders were hypertension (51.7%), diabetes (31.5%), and arrhythmia (19.1%). The clinical features usually presented with hematochezia (83.1%), abdominal pain (77.5%), and diarrhea (60.7%). The involved patterns were the left colon (56.2%), right colon (39.3%), and pancolon (4.5%). Based on the main histological features of ischemic colitis, including glandular atrophy (67.4%), hemorrhage (61.8%), capillary thrombi (42.7%), and coagulative necrosis of mucosa (29.2%), 67 of the 89 cases (75.3%) could be confirmed with ischemic colitis. There were no serious complications such as bowel perforation or major bleeding following the colonoscopy with biopsy. Conclusions: A colonoscopy with biopsy is beneficial and safe for the early and precise diagnosis of ischemic colitis. (Intest Res 2013;11:100-106)