주암댐 주변지역의 인문, 자연환경과 보전

김준선,장석모,김종홍 順天大學校 1992 論文集 Vol.11 No.1

주암댐이 건설됨에 따라 유역인구는 감소하였고, 전답은 침수되어 농업이 쇠퇴하여 댐 건설 전과 댐 건설 후의 인문환경은 차이가 있었다. 댐 주변지역의 기상은 안개일수의 증가와 일조시수의 감소가 뚜렷하여 내수면 증가에 따른 기상변화가 확인되었다. 현존 식생은 소나무림과 낙엽활엽수림으로 구성되었고 이는 7개의 자연군락과 10개의 대상군락으로 구분되었으며 식재림이 도처에 산재하였다. 댐 주변지역의 식물은 41목 122과 433속 629종 2아종 109변종 12품종으로 총 752종이 관찰되었다. 한편 녹지자연도 5, 7, 8이 대부분의 지역을 차지하였으며 수역이 증가하였고 어류상과 동물상의 변화는 생태계의 먹이사슬에 영향을 미치는 것으로 판단되었다. The population and the number of household around Juam-Dam watershed dscreased after the construction of the Dam. Lots of dry fields and paddy fields were submerged, which resulted in the decline of agriculture. Cultural environment, thus, seemed to have been changed in the area around Juam-Dam. Climatic changes were also observed between before and after the construction of the Dam. Especially foggy days were more frequently observed and photoperiod decreased in 1990 than previous years. Actual vegetation consisted of pine forests and broad-leaved forests. Nine kinds of natural forest community and 10 dinds of substitutional vegetation were classified in the surveyed area. Artificial forests were scattered in places. As for flora, a total of 752 species, that is 41 orders, 122 families, 433 genera, 629 species, 2 subspecies, 109 varieties and 12 forma, were observed. Degree of green naturality (DGN) of 5, 7, 8 was rated in the greater part of surveyed area with the increase of waters. As fishes and fauna changed, food web might be affected by deterioration of ecosystem.

치과용 고무인상재의 영구변형 및 압축시 변형률

전창주,김준철,정석민,박영준 대한치과기재학회 2001 대한치과재료학회지 Vol.28 No.1

This study investigated the permanent deformation of dental rubber impression materials in order to evaluate their degree of recovery from displacement during removal through undercut area. We also investigated the stain in compression in order to evaluate the materials' flexibility during removal from the month, or during removal of the cast from the impression. Additional silicone, polyether, and polysulfied rubber impression materials were tested for their properties of permanent deformation and strain in compression according to the testing methods of the ADA specificaltion no. 19. 1.The permanent deformation values were as follows: polysulfide (2.25%), polyether (2.14%), and additional silicone (0.28∼1.21%, 2.38% for Perfect F). Examix, Express and Provil, which are additional silicone rubbers, showed lower permanent deformation values of 0.29%, 0.28% and 0.34%, respectively. Perfect F, although it is an additional silicone rubber, showed the highest permanent deformation value (2.38%) within the tested materials. 2.The strain in compression values were as follows: polysulfide (10.63%), additional silicone (2.88∼10.09%), and polyether (2.38%). The additional silicone rubber samples showed various values. Contrary to our expectations, it is also notable that Vinylate, which is used when taking an one-step impression, had higher stain in compression value (10.09%) than the light body impression materials even though it is classified as a heavy body material. Express (a.s.) had a low strain in compression (2.88%) which is similar to that (2.83%) of Impregum F (p.e.). In light body rubber materials, Permlastic had the highest value (p.s. 10.63%), followed by Perfect F (a.s. 7.38%), Correct VPS (a.s. 7.13%), Examix (a.s. 6.04%), Provil (a.s. 3.82%) and Express (a.s. 2.88%). Although the tested materials showed various values, all of them satisfied the requirements of A.D.A. Specification No. 19, which require that permanent deformation be less than 2.5%, and strain in compression be between 2∼20%.

한글ㆍ영문 겸용 Word Processor System 개발에 관한 연구

이상인,강석건,서창렬,신태민,박규태,여재준,장이한 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2

The design theory and implementation of a word processor system with more efficient processing of Korean and English text are studied. A screen editing method is implemented which is more flexible to handle the texts. Convinient control of the keyboards, cursors moving, texts editing, line marking and block operations are considered. The codes to avoid the complexity and inefficiency which are caused by difference of the code length between the Korean and English characters are reconstructed. File management systems and algorithms for executing the control commands are also studied. As a result, a successful word processor system is designed and implemental which performs a complete screen editing system. The performance of the system includes flexible cursor movement, margin setting, block operations of insertion, deletion and copying any sizes of the line and blocks; and also, the printout routines for size variation of the characters are worked out.

휴대폰 카메라용 자동초점 구동기의 충격해석

이성민,김봉석,송준호,이수훈,이혜진,이문구,송준엽,이창우 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

Recently, the robustness against daily impact is important according to portablization and downsizing of mobile electronics. Especially, almost parts of cellular phone should undergo drop test when they fall 1.5 m above ground. This test simulates the case when cellular phone slips through user's fingers while he is talking on the phone. This paper studies a drop test of auto focusing (AF) actuator for camera module in cellular phone. This component is composed of voice coil motor (VCM) as an actuator and leaf spring as a guide and suspension. The leaf spring's deformation is essential for the test because its permanent distortion disables the focusing, and then, a high quality photograph cannot be obtained. Up to now the drop test has been carried out after fabricating real AF actuator. We propose a dropt test model which simulates the drop test based on finite element analysis. This model makes us enable investigate the stress acting on the clamping and curved parts of leaf spring. Stress over Von Mises criterion lets the spring deformed permanently, and then AF actuator malfunctioned, It helps us to design and modify AF actuator without manufacturing the real product. And also, it saves the time and cost for the development of new products.

인체 간 Microsome에서의 우슬 추출물의 Cytochrome P450 약물 대사효소에 대한 억제작용

김경아,이지숙,박히준,김진우,김창주,심인섭,한승무,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2003 東西醫學硏究所 論文集 Vol.2003 No.-

Objective : Achyranthes bidentata radix (Usul) has been used as anti-arthritic, antiallergic, antidiuretic and so on Recently extracts of Achyranthes bidentata radix have shown anti-inflammatory and cancer preventive effects in vitro and in vivo. Methods : We therefore evaluated the inhibitory potential of ehtanol extracts of Achyranthes bidentata radix on cytochrome P450(CYP) isoforms-catalyzecd reactions, which relate to causes of cancer and inflammation, including CYP1A2, CYP2C9, CYP2C19, CYP2E1, CYP2D6, CYP2C8, and CYP3A4, using human liver microsomal preparations. Results : The extracts showed weak or negligible inhibitory effects on CYP2C9-catalyzed (S)-warfarin 7-hydroxylation, CYP2C19-catalyzed S-mephenytoin 4-hydroxylation, and CYP2D6-catalyzed dextromethorphan O-demethylation with each IC50 over 1750 g/㎖, respectively. However, it showed relatively significant inhibitory effect on CYP1A2-catalyzed phenacetin O-deethylation and CYP2E1-catalyzed chloizoxazone 6-hydroxylation with IC50s of 970.5 g/㎖ and 821.4 g/㎖, respectively. Conclusions : These results suggest that extracts of Achyranthes bidentata radix have inhibitory effects on CYP-catalyzed reactions, expeciallyCYP1A2 and CYP2E1, in human liver microsomes. These effects appear to relate to anti-inflammatory and cancer prevention following decrease of reactive oxygen species formed by CYP, especially CYP1A2 and CYP2E1, by Achyranthes bidentata radix. However, further evaluation is necessary to demonstrate and to confirm its effects in human.

슬개골에 발생한 연골모세포종의 동맥류성 골낭종화 - 증례 보고 -

홍준석,김성곤,박종웅,강창석,Hong, Joon-Seok,Kim, Sung-Kon,Park, Jong-Woong,Kang, Chang-Suk 대한근골격종양학회 1999 대한골관절종양학회지 Vol.5 No.4

저자들은 우측 슬개골의 동통을 주소로 내원한 50대의 여자환자에게서 병변에 대해 소파술 및 골 이식술을 시행한 결과 이차성 동맥류성 낭종화한 연골모세포종을 확인하여 문헌 고찰과 함께 보고하는 바이다. Chondroblastoma of the patella is a uncommon benign neoplasm in the middle aged person. Furthermore, a hemorrhagic cystic change associated with chondroblastoma is extremely rare. We experienced a case of chondroblastoma which underwent hemorrhgic cystic change. A fiftyyear-old female patient has suffered from right knee joint pain for 1 month before. Dominant gross feature was hemorrhagic cyst which was not involved into the joint space. Soft tissue was curetted and it was diagnosed to be chondroblastoma. The case was treated with curettage and bone graft.

지능형 정속주행 제어시스템 개발

임영도,설재훈,한창훈,김승철,박종오,이준탁,방석원 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

This paper describes an intelligent cruise control system for automobile. With the remarkable numericalincrease of automobiles on the roal, the optimized traffic flow control using the cruise control is one of the very important traffic problems to overcome the limitation of an existing road capacity. Based onthis idea that minimize the fuel cost and teh air pollution, and accept a driver's needs for driving, we have developed an intelligent cruise control system for vehicle. This proposed intelligent fuzzy cruise controller was successfully implemented using the fuzzy algorithm, the i80c196 μ-controller board and the throttle valve actuator. The field test results on an linear road was introduced.

다발성 간종괴의 형태로 나타난 특발성 과호산구 증후군 치험1예

최승오,연규민,이승민,김순제,왕준호,박형석,이재동,진춘조,이창훈,신현준,김정은 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Hypereosinophilic syndrome is characterized by persistent blood eosinophilia of 1,500/ul or more in the absence of known causes and multiorgan dysfunction by eosinophil-related tissue damage. In Korea, some cases of hypereosinophilic syndrome with hepatic involvement have been described with prolonged benign clinical courses. Most of them were diffuse or multifocal lesions in imaging studies, and a few case presenting as a single mass has been described. Here we report a case of hypereosinophilic syndrome with hepatic involvement in a 65-year-old man who presented with multifocal mass lesions. By abdominal US and CT scan, multiple, ill-defined nodules were detected in throughout the liver. Liver biopsy revealed severe eosinophilic hepatitis, suggestive of hypereosinophilic syndrome. Hepatic mass lesions improved after steroid administration for several weeks.

2009년 인플루엔자 대유행 중 인플루엔자 진료소 방문자의 연령 분포 변화

김백남,곽이경,문치숙,김연숙,김의석,배인규,염준섭,이창섭,허지안 대한감염학회 2010 감염과 화학요법 Vol.42 No.2

The pandemic influenza (H1N1 2009) virus, after being introduced in Korea in April, 2009, spread rapidly nationwide in mid-2009. This study was conducted to characterize trend in age distribution of visitors to Flu-clinics during the pandemic. Demographic, clinical and laboratory data of visitors to flu clinic from Week 36 to 52 (August 30 to December 26) of 2009 were retrieved and collected from electronic databases at 9 hospitals. Visitors 0-6, 7-12, 13-18, 19-29, 30-64, and 65 years or more of age were classified into group I to VI, respectively. A total of 107,467 visitors were seen at Flu-clinics for a 17-week study period. Of those, 32,485 were laboratory-confirmed. Antivirals were prescribed for 62,533 visitors. Numbers of visits, prescriptions of antivirals, and laboratory-confirmed cases of the pandemic influenza (H1N1 2009) peaked at Week 44. A large number of visits by group II and III were followed by those of group I and V, especially around the peak. Numbers of visits by group VI were lowest in all hospitals. In some hospitals, higher number of visits lasted longer in children than in adults while vice versa in other hospitals depending on the location. In summary, the pandemic influenza (H1N1 2009) was presumed to peak in late October and involved majorly children and students in Korea. Unique age distribution of visitors to flu clinic was observed in some hospitals.

Poster Session : PS 1239 ; Pulmonology : Azathioprine Induced Cholestatic Hepatitis in Patient with Boop

( Hyung Woo Kim ),( Joo Han Song ),( Kyung Soo Chung ),( Song Yee Kim ),( Eun Young Kim ),( Ji Ye Jung ),( Young Ae Kang ),( Young Sam Kim ),( Se Kyu Kim ),( Joon Chang ),( Moo Suk Park ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Azathioprine is widely used as an immunosuppressive drug in infiammatory bowel disease, many autoimmune disease and after organ transplantation to avoid rejection. Azathioprine has adverse reactions like hepatotoxicity. We report a case of azathioprine induced cholestatic hepatitis in patient with bronchiolitis obliterans organizing pneumonia(BOOP). A-37-year old woman was admitted because of pruritus and jaundice. She took transbronchial lung biopsy, bronchoalveolar lavage for cough, dyspnea and GGO patterns on chest computed tomography(CT) scan before she admitted. And it was revealed that she had BOOP. So she had been followed and treated for BOOP with prednisolone from 23th Nov 2012 and azathioprine from 8th Jan 2013. 42 days after taking Azathioprine, routine blood test was taken. Serum bilirubin, alkaline phosphatase(ALP), aspartate transaminase(AST), and alanine aminotransferase(ALT) was elevated(Bilirubin 4.4mg/dL, AST 75IU/L, ALT 104IU/L) and. Other laboratory test, including prothrombin time, serum albumin, and serum protein were within normal range. There was no history of alcohol abuse or herbal medication intake at this period. To exclude other reasons for hepatotoxicity, serological test was performed. The patient tested to negative for Hepatitis A, B, and C as well as for other markers of autoimmune hepatitis. CT scan showed hepatomegaly with lymph node enlargement and there was no evidence of bile duct obstruction. And TPMT(thiopurine methyltransferase) genotyping was done and revealed to be wild type. Azathioprine was stopped and she was monitored for laboratory changes. Because it was regarded as azathioprine induced cholestatic hepatitis and jaundice, we considered not to do liver biopsy. Day 55 after starting azathioprine therapy, total bilirubin reached peak (12.3mg/ dL). The patient was discharged on day 63 with cholestatic parameters of 115U/L(ALP), 36U/L(γ-GT), and 11.5mg/dL(total bilirubin). After 2 months, total bilirubin was decreased to normal(0.8mg/dL). Treatment of BOOP has been continued only with oral steroid.