Original Articles : Clinical significance of occult hepatitis B virus infection in chronic hepatitis C patients

( Jae Young Jang ),( Soung Won Jeong ),( Sung Ran Cheon1 ),( Sae Hwan Lee1 ),( Sang Gyune Kim ),( Young Koog Cheon ),( Young Seok Kim1 ),( Young Deok Cho1 ),( Hong Soo Kim ),( So Young Jin ),( Yun Soo 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.3

Background/Aims: We investigated the frequency of occult hepatitis B virus (HBV) infection in anti-hepatitis C virus (HCV)-positive individuals and the effects of occult HBV infection on the severity of liver disease. Methods: Seventy-one hepatitis B virus surface-antigen (HBsAg)-negative patients were divided according to their HBV serological status into groups A (anti-HBc positive, anti-HBs negative; n=18), B (anti-HBc positive, anti-HBs positive; n=34), and C (anti-HBc negative, anti-HBs positive/negative; n=19), and by anti-HCV positivity (anti-HCV positive; n=32 vs. anti-HCV negative; n=39). Liver biopsy samples were taken, and HBV DNA was quantified by real-time PCR. Results: Intrahepatic HBV DNA was detected in 32.4% (23/71) of the entire cohort, and HBV DNA levels were invariably low in the different groups. Occult HBV infection was detected more frequently in the anti-HBc-positive patients. Intrahepatic HBV DNA was detected in 28.1% (9/32) of the anti-HCV-positive and 35.9% (14/39) of the anti-HCV-negative subjects. The HCV genotype did not affect the detection rate of intrahepatic HBV DNA. In anti-HCV-positive cases, occult HBV infection did not affect liver disease severity. Conclusions: Low levels of intrahepatic HBV DNA were detected frequently in both HBsAg-negative and anti-HCV-positive cases. However, the frequency of occult HBV infection was not affected by the presence of hepatitis C, and occult HBV infection did not have a significant effect on the disease severity of hepatitis C. (Korean J Hepatol 2011;17:206-212)

청각 자극용 전기자극기 개발

허승덕,정동근,김리석,김광년,강명구,김재룡,김기련 한국음성과학회 2004 음성과학 Vol.11 No.3

This paper introduces a development of an electrical stimulator for auditory stimulation. The electrical stimulator is useful in neurotological diagnosis, audiological evaluation, candidate selection for cochlear implantation, optimal device selection and decision making of MAP strategy for severe-to-profound hearing impaired persons. The development was based on sound parameters of auditory brainstem responses and auditory electrophysiological characteristic such as effective firing of auditory nerve and recording evoked potentials during refractory period of neuron. Besides pulse parameter could adjustable by programming for more varied electrical stimulation evoked response audiometry. Using the electrical stimulator, electrical square pulse was applied to promontory, and electrically evoked auditory brainstem response and electrically middle latency response were successfully recorded in cats.

뿜칠시공에 의한 단면복구재의 시공성 및 공학적 특성에 관한 실험적 연구

조봉석,김영선,장재봉,김용로,김경덕,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

These days, serious concerns of reinforced concrete have been raised recently over steel-bar corrosion, cracking, the deterioration of durability and structural stress resistance and so on, all due to the effects of exterior factors. Such being the case, in domestic, various repair materials and method systems to keep up with these reinforced concrete deteriorated due to salt damage, carbonation, chemical decay et. developed and applied. However, on-site quality control of various repair materials and method systems isn't achieved desirably because it is depend completely on a men of experience' opinions above all else regardless of various on - site environments. In this background, mock up test with due regard to real on-site environments was performed to secure fundamental data for establishment of desirable on-site quality control. Mock up test using repair mortar analyzed from angles of construction methods, mechanical spraying pressures, W 1M. Construction methods were designed manpower method and spraying method, spraying pressures were designed 32, 42, 52 psi, W/M were designed 14.4, 15.4, 16.4 %. And compressive strength, Chloride ion diffusion coefficient, bond strength, SEM of mock up test specimens were evaluated. In conclusion, we confirmed excellency of mechanical spraying pressures, fined extremely excellency of condition of spraying pressure 42 ps, W/M 14.4% within this study. therefore the results of this study will be useful to provide fundamental data for establishment of desirable on-site quality control.

매복치의 외과적 노출에 대한 임상적 연구

김지연,김재덕,백종성,손경준 조선대학교 구강생물학연구소 2002 口腔生物學硏究 Vol.26 No.2

Impaction and ectopic eruption of Permanent teeth can cause various clinical Problems. These teeth are not hopeless. It is possible to use the remaining teeth as anchorage, surgically uncover the impacted tooth, and orthodontically move the tooth into the arch. The specific surgical procedure and the orthodontic mechanics, however, will vary depending upon the type of tooth and its position relative to the remaining erupted teeth. There are different surgical techniques for the surgical exposure of the impacted teeth. These case reports described the surgical exposure using the apically positioned flap(APF) and closed eruption technique ,

C형 및 S형 단백 결핍에 의한 하지 심부 정맥혈전증

김향경,조용필,이덕희,안재홍,장혁재,김지수,김용호,한명식 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.2

Purpose: Protein C and S deficiencies are frequently described as causes of the hypercoagulable states. The aim of this study was to evaluate the clinical features and prognosis of deep venous thrombosis associated with protein C and/or S deficiencies and to determine an adequate treatment modality for such cases. Method: A total of consecutive 42 patients with deep venous thrombosis of the lower extremity were seen in our hospital between September 2000 and August 2002. Hypercoagulability studies were done before systemic anticoagulation therapy, and the diagnosis of protein C and/or S deficiencies was confirmed if antigenic protein C and/or S levels were less than 60%. Result: Seven patients (16.7%) were diagnosed with deep venous thrombosis associated with protein C and/or S deficiencies. Of these, 5 patients with acute iliofemoral deep venous thrombosis were treated with catheter-directed thrombolysis therapy, and 2 with systemic anticoagulation therapy. There were no major complications or clinically detectable pulmonary emboli. Conclusion: Protein C and/or S deficiencies are one of the common causes of deep venous thrombosis. Considering that patients with deep venous thrombosis and protein C and/or S deficiencies should be treated with life-long anticoagulation for the prevention of recurrence, patients presenting with deep venous thrombosis without evidence of other risk factors should be evaluated for hypercoagulable states.

전압형 인버터에 의한 直流 스폿鎔接器의 定電力制御에 關한 硏究

김재문,김학성,박성수,원충연,김덕헌 成均館大學校 科學技術硏究所 1996 論文集 Vol.47 No.1

In recent years, there is increasing interests in spot welder with industrial growth of automobile. It makes autowelding and short-time welding possible. Conventional spot welders using AC source bring about the depreciation of welding products, because constant current control makes its workpiece spattered during welding process. In this paper, the constant power control strategy using PI controller is proposed to improve the quality of the welding products. PI controller is implemented by l6bit one chip 80C196KB microcontroller. Simulation and experimental results show that DC spot welder with single phase PWM inverter is effectively controlled by the constant power control method in very short-time.

윌름종양의 치료에 대한 임상적 고찰

김재성,조문준,박경덕,설종구 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.2

Wilms' tumor is the paradigm for multimodal treatment of a pediatric malignant solid tumor. Developments in surgical techniques and postoperative care, recognition of the sensitivity of Wilms' tumor to irradiation, and the availability of several active chemotherapeutic agents led to a dramatic change in the prognosis for most patients with this once uniformly lethal malignancy. This article presents four cases of Wilms' tumor managed at Chungnam National University Hospital and reviews current treatment recommendations for patients with Wilms' tumor, based upon the results of the National Wilms' Tumor Studies.

光州·木浦圈 落後地域의 均衡發展에 관한 硏究 : 羅州市를 中心으로 Focused on Naju-city

金在國,丁英德 東新大學校 工業技術硏究所 2000 工業技術硏究 Vol.6 No.-

As capital circle and Busan region have been extensively developed with economic growth centered policies, population and industries were concentrated at these regions and then urban problems in housing, traffic and environment and unbalanced development among regions have been seriously raised. Therefore great-sphere development project circles are designated at eight regions with the surrounding areas of metropolitans and new industrial areas and their development projects are established for the activation of local economy through the induction of balanced regional development and the active altraction of privale capital. However, great-sphere development project also shows biased regional development remarkably and it is considered that the research for solution of such a problem is urgent. Also industrial and SOC are biased only on Kwangju and Mokpo regions within Kwangju - Mokpo great-sphere development project of Kwangju and Mokpo circle established in 1998 and it resulted in regional polarization. Especially, Naju is located geographically in the center of Kwangju - Mokpo great-sphere development circle and is also the traffic center and although it played the important roles as the capital and was the center of commercial activities, its development as the urban area was dull because of the development of industry, traffic and communication. Accordingly, this study is to suggest the methods for seeking the companion growth among Kwangju, Naju and Mokpo within the same circle by solving the problems due to the bias of industrial and SOC facilities, extending the urban spatial structure for developing Naju-city, a backward region and expanding SOC facilities with the cultivation of distinctive industries.

국사학습 연표자료의 실태와 개발방안

김덕진,박태선,정종재 전남사학회 2002 역사학연구 Vol.19 No.-

A chronological table of Korean history is a study material which is arranged for us to understand the course of a historical development and a table that historical events are arranged and systematized in a chronological order as time passes, As a middle school Korean historical textbook has 10 chronological tables and a highschool Korean historical textbook has 6 chronological tables, they are very useful to take a general view of the unit. But the years which can represent the unit are left out or the facts which are not referred to in the main text are wrote down. On the other hand, the facts which are written down in a chronological table are not seen in the main text or in the general chronological table. In addition, a middle school historical textbook has two main chronological tables while a highschool historical textbook has nothing. Therefore we should write down the historical facts as 3 aspects of the followings. First, There can be a periodical history divided into a short period, a middle period, and a long period. Second, There can be a classified history divided into a political, an economical, a social, and a cultural affairs. A third, There can be a thematic history divided into a military, a foreign, a traffic, a communicative, an industrial, an educational, an academic, and a religious affairs. Otherwise, we had better make a chronological table which is divided the historical facts occurred in an special period into some kinds of categories or into a region, a race, and a nation.

한국어 형태소 처리와 사전 : 접속정보를 이용한 한글 철자 및 띄어쓰기 검사기 Hangul Spelling and Word-spacing Checker Using the Connectivity Information

김덕봉,최기선,강재우 서울대학교 어학연구소 1990 語學硏究 Vol.26 No.1

This paper describes the Hangul spelling and word-spacing checker, HSPELL. HSPELL was implemented in C and runs under UNIX^TM 4.3 BSD. The system finds spelling or word-spacing errors in the text of written Hangul and points out it by batch mode. For this processing, HSPELL uses the connectivity information between morphemes and the dictionary with 7,000 morphemes. In this paper, a morphological analysis method called shortest match strategy is proposed for the Hangul spelling and wordspacing checking. This method allows efficient search for separable morphemes in a word phrase.