산업부산물을 이용한 고성능 콘크리트의 특성에 관한 연구

류현기,윤승조 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.2

This is study intended to develop the high performance concrete by using Fly Ash, Silica Fume and Expansive Additives in order to prevent the crack from caused by dry-shrinkage and get the economical efficiency. Form the test results, the optimum addition rate based on the fluidity, segregation resistibility, strength and length-change test can be achieved at 5% of Expansive Additives in the combination of 15:5 (Fly Ash : Silica Fume).

충주시 문화회관 구조물 안전성에 관한 사례연구

윤승조,류현기 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.2

The structure which was introduced in this case study of the safe degree was the structure of Chungju Mun Wha Hall located in downtown in Chungju City, Chungbuk. In this case that our country had been developed the rapidly economic development since the 1970's, the several problems of the maintain and management of the existing structure had been started finding on the starting point of the breakdown of Sampung Department and Seongsu Bridge in building a large construction business like the apartment construction of 2 million houses in new town; Illsan, Bundang, Pyongchon, Sanbon, express electric railway and new airport construction, etc, for solving the housing problem including Seoul Olympic Games. In this situation, the evaluation of a concrete crack and its durability, the forecasting of concrete life, the caution in time of selecting the repair method of construction, and the importance of technology development were emphasized again. As a structure which had been built ten years ago, because there have been some cracks in sub-material parts, this thesis researched a crack and the modified state like the several present, the iron frame and the concrete reinforcing degree, the existance or nonexistance of the deficient of the iron framed trust, etc. On the basis of this result, after this thesis investigated the state degree of the structure, it presented the proper repair and the reinforcement of this structure.

혈액투석중인 말기신부전 환자에서 Fludrocortisone acetate (FCA) 투여 후 혈청 칼륨 저하 효과

류봉관,강대웅,정지용,윤나라,신병철,박경희,정종훈,김현리 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

Background: Hyperkalemia is a commonly encountered problem in dialysis patients with end-stage renal disease. In this study we evaluated the effect of mineralocorticoid therapy (fludrocortisono acetate) on serum potassium level in the serum of hyperkalemic end-stage renal disease patients. Methods: Fourteen patients on hemodialysis receiving fludrocortisone acetate (FCA) 0.1 mg/day were observed for 2 months periods. Consecutive monthly biochemical profiles were compared for the druration of the pre-and post-treatment of FCA. Result: Fourteen patients with mean age (±SE) of 51.5 years (4 males and 10 females) and mean hemodialysis period of 51.9 months were studied. Mean serum potassium levels significantly fell (p<0.05) during the post-FCA period (5.2±0.66 mEq/L) compared with potassium levels during the pre-FCA (5.8±0.43 mEq/L) period. Pre-and post-FCA values were not different for sodium, chloride, protein, albumin, AST/ALT, glucose, blood nitrogen, creatinine, phosphate and calcium. Conclusions: FCA appears to decrease serum potassium value in patients with end-stage renal disease. These results suggested that FCA could be effective to treat hyperkalemia without any adverse effect in patients undergoing hemodialysis.

성견에서 표면처리된 교정용 마이크로임플랜트의 골 접촉률 및 동요도

박승현,김성훈,류준하,강윤구,정규림,국윤아 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.6

The purpose of this study was to evaluate the mobility and ratio of the bone-implant contact (BIC) of a sandblasted, large grit and acid-etched (SLA) orthodontic micro-implant. Methods: Ninety-six micro-implants (48 SLA and 48 machined) were implanted in the upper and lower buccal alveolar bone, and palatal bone of four beagle dogs. Two weeks after surgery, orthodontic force (150 - 200 g) was applied. Two beagles were sacrificed at 4-weeks and the other two at 12-weeks. Histomorphometric comparisons were made between the SLA experimental group and the machined micro-implant as a control group to determine the ratio of contact between the bone and implant. Micro-implant mobility was also evaluated using Periotest. Results: Periotest values showed no statistically significant difference in the upper alveolar and palatal bone between groups except for the lower buccal area. BIC in the upper buccal area showed no significant difference between groups both at 4-weeks and 12-weeks. However, both the groups showed a significant difference in BIC ratio in the rest of the experimental areas between 4 weeks and 12 weeks. The experimental group showed active bone remodeling around the bone-implant interface compared to the control group. Conclusions: There were significant differences in the BIC and the Periotest values between the surface-treated and machined micro-implants according to bone quality in the early stage. 본 연구는 비글견에 식립된 sandblasted, large grit and acid-etched (SLA) 표면처리된 교정용 마이크로임플랜트와 평활면 마이크로임플랜트에 교정력을 가한 후 시간 경과에 따른 동요도와 골접촉률의 차이를 규명하기 위해 시행되었다. 비글 성견 네 마리를 이용하여 상, 하악 협측과 구개측 골에 대해 SLA 표면처리된 표면처리군 48개, 평활면의 비처리군 48개의 마이크로임플랜트 96개를 식립하고 2주의 치유기간 후 교정력(150 - 200 g)을 지속적으로 가했으며 식립 4주 후에 두 마리를 희생시키고, 12주 후에 나머지 2마리를 희생시켰다. 표면처리군과 비처리군 간의 마이크로 임플랜트의 동요도와 골과 임플랜트 간 접촉률을 조직학적인 측면에서 측정 비교하여 다음과 같은 결과를 얻었다. 상악 협측과 구개측에서는 표면처리군과 비처리군의 동요도에서 유의성 있는 차이가 없었으나 하악협측에서는 표면처리군이 유의하게 안정적인 동요도를 보였다. 마이크로임플랜트와 인접골 간 접촉률은 상악 협측에서는 4주와 12주 모두 표면처리군과 비처리군 간에 유의한 차이가 없었으나 하악 협측과 구개측의 경우 4주와 12주 모두 표면처리군이 비처리군에 비해 유의하게 높은 접촉률을 보였다. 표면처리군은 비처리군에 비해 임플랜트 주변에서 활발한 골개조가 관찰되었으며 모든 군에서 이물반응은 관찰되지 않았다. 본 연구를 통해 SLA 표면처리된 마이크로임플랜트는 평활면 마이크로임플랜트에 비하여 식립 초기에는 식립 부위에 따라 유의하게 높은 인접골 간 접촉률과 동요도의 안정성을 보임으로써 다양한 크기와 방향의 교정력의 적용이 가능할 것이라 생각한다.

연쇄상구균을 실험감염시킨 넙치치어의 병리조직학적 관찰

조성환,류시윤,김현수,박배근,김덕환,손화영,윤원기,신창호 충남대학교 수의과대학 동물의과학연구소 1999 動物醫科學硏究誌 Vol.7 No.-

Pathological observations were examined after abdominal inoculation in 7∼8㎝ sized flounder (Paralichthys olivaceus) with 1X10^7 cfu/㎖ of Streptococcus faecalis. The infected flounder were clinically observed and weighed a fish body at 0, 5, 10, 15, 20, 25, 30 days post inoculation. In infected group, mortality were 70% and feed efficiency were 7.2%. In non-infected group, mortality were 10% and feed efficiency were 18.2%. Macroscopically, the significant lesions were characterized by protrusions and opacity of the eyes and ulcer of the caudal pecuncle. Histopathologically, the lesions were observed a degeneration. necrosis and inflammatory cells in muscle of the caudal peduncle and a degeneration and necrosis of the rod cells and detached retina from the black pigmented layer

방사선 치료를 받는 암 환자들의 사회적 지지와 삶의 질과의 관계

정주희,류소연,윤혜은,남택근,오윤경,안현옥,박계남,이영선 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2

Objective : This study was performed to investigate the relationship between social support and quality of life among cancer patients receiving radiation therapy. Matehals and Methods : The data were collected from 98 patients, who were receiving radiation therapy at two university hospitals located in GwangUJu, used by structured questionnaire. For statistical analyses of the association between quality of life and various characteristics, data were analyzed using t-test, ANOVA, Pearson 's correlation, and multiple regression analysis. Results: 1. There were 56(57.1%) males and 42(42.9%) females. Age ranged from 21 to 82 years. The primary sites of cancer were gastrointestinal tract (24.5%), lung (23.5%), breast (21.4%), and head and neck (11.2%) in order. 2. The mean scores of social, family, and medical support were 4.30 0.58, 4.49 0.78, 4.11 0.65, respectively. The score of quality of life was 5.83 1.63 (range: 1.95 ~ 9.05). 3. An analysis of the association between several factors of patients and quality of life showed that the statistically significant factors were age, the presence of distant metastasis, family support, medical support and social support. 4. As a result of the multiple regression analysis, only social support was significant (β=0.932, P=0.02) with quality of life, but age and presence of distant metastasis were not significant. Conclusion : This suggests that quality of life in cancer patients could be improved by strengthening the social support which consists of family and medical support. Further study would be necessary to evaluate separately several aspects of quality of life among cancer patients.

忠州市 地域特性을 反暎한 共同住宅 計劃硏究 : 충주지역 거주자의 APT 선호특성을 중심으로

朴碩鉉,朴義權,柳顯紀,尹勝照,孫泰鎭,金基洙 충주대 2003 産業科學論文集 Vol.11 No.-

The purpose of this research is to analyze the correlation of the characteristics of dwellers and residential preference in apartment housing through the case study of 340 samples in 25 housing estates which were built in Chung-ju city The contents of this research consist of two main parts. The first part is to identify characteristics of dwellers, which might have an influence on residential preference in apartment housing. The second part is to identify the main physical elements of residential preference that can be influenced by the personal characteristics. Thus, this research will contribute to the establishment of the planning methods which increase residential preference in apartment housing, while promoting the quality of residential environment in Chung-ju city.

忠州市 主幹線 道路邊 建築外部色彩에 關한 硏究

崔生吉,孫泰鎭,柳顯紀,辛同寅,梁富弘,尹勝照,朴碩鉉 忠州大學校 1998 한국교통대학교 논문집 Vol.33 No.2

In order to understand the influence of colours on the urban design of a city, a portion of the central Chung-Ju was chosen as the study area, and three cases were researched as colours. These surveyed colours are analysed in their hue, value and chroma. It was necessary to determine the colours of 272 buildings exterior in all in order formulate the findings presented in this study. The result of this study can be briefly summerised as the following ; 1) The trends in the use of colour turn out like this ; 55.3% of the building were Y(yellow), YR(yellow-green), R(red) Family in Hue, abour 33.9% of them were within 8.0-8.9 and 26.6% were within 7.0-7.9 on the value scale, and about 48.5% of them were within 1.0-1.9, 2.0-2.9 and 3.0-3.9 on the chroma scale. 1) For case 1 on the exterior colours of buildings, about 57.8% were Y and YR family in Hue, about 53.7% were 8.0-8.9 and 7.0-7.9 in Value, and about 49.6% of them were within 1.0-3.9 in chroma. 2) For case 2 on the exterior colours of buildings, about 52.4% were Y and R family in Hue, about 65.1% were 7.0-8.9 in Value, and about 46% were 1.0-2.9 in Chroma. 3) For case 3 on the exterior colours of buildings, about 55.7% were Y and YR Family in Hue, about 72.1% were 7.0-8.9 in Value, and about 31.1% were 2.0-2.9 in Chroma. In summary, the colours of the building surveyed in central Chung-Ju can be characerized as Y, YR, R, N family in Hue, 7.0-7.9, 8.0-8.9 in Value registered in 1.0-1.9, 2.0-2.9, 3.0-3.9 in Chroma. The observed exterior colours show a tendency toward Yellow in Hue, High in Value and low in Chroma. Generally, the majority of the colours is light rather than strong in tone.

만성 C형 간염 환자에서 페그인터페론 알파2a와 리바비린 병합 치료중 발생한 벨마비 1예

김일환,장제혁,유충헌,최규남,고정해,김윤정,서광원,김지현,박성재,박은택,이연재,이상혁,설상영 인제대학교 2008 仁濟醫學 Vol.29 No.-

페그인터페론과 리바비린 병합요법은 만성 C형 간염의 일차 치료법이다. 저자들은 만성 C형 간염 환자에서 페그인터페론 과 리바비린 병합 요법 중에 발생한 벨마비 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. 환자는 5년 전부터 만성 C형 간염을 앓아온 48세 남자이며, PEG-IFN α-2a 135μgm 피하주사 주1회와 하루 1200㎎의 리바비린을 투여하였다. 치료시작 후 9개월째 환자는 오른쪽 안면의 근력약화를 호소하였으며 벨마비로 진단되었다. 페그인터페론과 리바비린 병합요법을 지속하면서 관찰하였다. 환자의 벨마비는 페그인터페론 치료를 중단하지 않았음에도 3개월후 증상이 회복되고 이후 벨마비 재발 없이 현재 경과관찰 중이다. 만성 C형 간염에서 페그인터페론과 리바비린 병합 요법시 벨마비의 발생 가능성을 염두에 두어야 하겠다. A Case of Bell's Palsy Associated with Combination Therapy of Pegylated Interferon Alfa-2a (PEG-IFN) and Ribavirin for Chronic Hepatitis C Virus Infection Pegylated interferon alfa(PEG-IFN α) and ribavirin therapy is the first line treatment for chronic hepatitis C. Mild complications of the therapy are common, but more serious complications are rare. We report here a case of Bell's palsy that occurred in a patient with chronic hepatitis C virus infection during combination therapy of PEG-IFN α-2a and ribavirin. The patient was 49-year-old man with chronic hepatitis C (genotype 1b) for 8 years. He had compensated liver cirrhosis with splenomegaly. Therapy with PEG-IFN α- 2a 135mcg/week and ribavirin 1200mg/day was initiated. After 9 months of the therapy, the patient showed a loss of muscular tone on the right side of his face. A diagnosis of Bell's palsy was made. The Bell's palsy resolved over 3 months despite continuation of the combination therapy.

돼지생식기호흡기 증후군(PRRS) 바이러스 감염시킨 돼지 기관의 병리학적 관찰

조성환,김현수,윤원기,전무형,류시윤,박배근,손화영,김무강 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-

The porcine reproductive and respiratory syndrome virus was inoculated into swine tracheal organ culture. The ballooning degeneration of the tracheal ciliated epithelium and a decrease of ciliary activity from the tracheal organs infected with PRRS virus were observed one day post-infection(PI). Tracheal epithelium showed degeneration and focal necrosis 2 days PI. Epithelial necrosis and loss of cilia and epithelial cells became more severe 3 and 4 days PI. An entire loss of cilia and epithelial cells were recognized 4 days PI, however, control tracheal organs were normal during the period of the experiment except a little decrease of ciliary activities with time..