뇌졸중 및 뇌손상 환자의 경관 유동식이에섬유소 첨가시 설사에 대한 효과

전세일,김동아,온석훈,조성래,서정훈,윤태준,유성,전중선,김정남,윤지영 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.5

低사이클 反引張을 받는 鋼棒의 圓孔노치底 크랙發生에 관한 硏究

孔基勳,吳世旭 東亞大學校 大學院 1981 大學院論文集 Vol.5 No.-

Many studies on fatigue crack propagation have been presented but the behavior of fatigue and its mechanism is not clarified enough yet, especially low cycle fatigue. Some experiments in this study were carried out by the method of changing stress amplitude under constant mazimum stress and low cycle pulsating tension fatigue testing on fatigue crack propagation at room temperature. Propagating cracks were observed with potical microscope on crack initiation and growth. The obtained results are summarized as follows: ⑴ Fatigue strength was higher in S-N curve as stress amplitude was decreasing, mean stress inereasing, too. ⑵ The initiation of fatigue crack was occured at 28~32% through the total fatigue life. ⑶ The summarized relationship between crack propagation rate and stress intensity factor of structural steel (SM45C) is as follows. The value of exponent m was 1.41-1.85. ⑷ Propagating crack in fatigue generally passed along grain boundaries and ferrite matrix, it passed around and branched cause of hard inclusion. ⑸ In the case of higher stress amplitude the shpae of crack propagation and fracture surface was intricate.

연제련 근로자들의 만성적 연폭로에 관한 연구

이세훈,조영선,김정만,이은영 가톨릭대학산업의학센타 산업의학연구소 1985 韓國의 産業醫學 Vol.24 No.1

For the purpose of obtaining of effective biological monitoring data, studies to evaluate the health consequences of lead absorption were conducted smelter workers who have been exposed to lead occupationally. The 103 smelter lead workers and the 102 smelter non-lead workers were observed and the questionnaire covered age, work history, symptoms possibly associated with lead poisoning. The biological parameters chosen for this study were as follows; blood lead(PbB), urine lead(PbU), δ-aminolevulinic acid in urine(ALAU), coproporphyrin in urine(CPU), zinc protoporphyrin in whole blood(ZPP), hemoglobin(Hb), δ-aminolevulinic acid dehydratase(ALAD) activity & ALAD activity ratio(A/R; absorbance at substrate pH 6.6/absorbance at substrate pH 5.8). The results obtained were as follows; 1. The average age were 39.1±7.4 years and 39.2±7.7 years in smelter lead workers and smelter non-lead workers, respectively. In smelter lead workers and smelter non-lead workers, the average work duration were 131.7±63.3 months and 138.1±63.1 months, respectively. 2. The mean value of blood lead were 45.0+8.8㎍/100ml and 36.4±6.8㎍/100ml in smelter lead workers and non-lead workers, respectively. In smelter lead workers and non-lead workers, the mean value of zinc protoporphyrin were 89.6+45.1㎍/100ml and 46.5+21.5㎍/100ml, respectively. The mean value of other biological parameters except ALAD & A/R of smelter lead workers were in normal range. 3. Among various pairing of the biological parameters of lead exposure in smelter lead workers and smelter non-lead workers, the correlation between PbB & ZPP showed highest coefficient value. 4. A simple regression analysis was done between PbB and ZPP, and between PbB and CPU, taking PbB as a dependent variable. In smelter lead workers and smelter non-lead workers, coefficients of determination between PbB and ZPP were 67.1% and 59.2%, respectively. Also, the coefficients between PbB and CPU were 45.1% and 26.7%, respectively Consequently, ZPP is better indicator than CPU in estimation PbB levels in screening test of lead absorption. 5. Gastrointestinal compliants were the most frequent self-reporting symptoms. As more frequent are the compliants, the mean concentration levels of PbB and ZPP increased.

중국대학교육발전을 위한 개혁과제

박세훈,최해금 全北大學校 敎育大學院 2002 敎育論叢 Vol.22 No.-

This study reviews reform tasks for developing the Chinese university education. Chinese university remains underdeveloped, compared with other countries with similar economy level. Difference in demand and supply of university education is an issue, confronting Chinese Higher Education. Chinese universities have been controlled by government's close supervision under old planned economy. This implies that Chinese higher education adopt free market system. Society and individuals as well as Central Government need to be involved in establishment and management of university. Private universities should be developed with policy support of Central Government. Free competition and supplementation are major directions which public and private universities should be developed and managed. Quality control and efficiency are a share of university authorities. Government's minimal control and university's autonomy are key reform tasks for developing Chinese university education and upgrading university quality.

접착제와 와동형성의 차이에 따른 5급 복합레진 수복의 전향적 임상연구

이경욱,정세준,한영철,손호현,엄정문,오명환,조병훈 大韓齒科保存學會 2006 Restorative Dentistry & Endodontics Vol.31 No.4

본 연구의 목적은 복합레진을 이용한 비우식성 치경부 5급 병소 수복에 있어서, 3가지 다른 접착제를, 유지구를 부여한 치아와 부여하지 않은 치아에 적용하였을 때의 임상적인 효능의 차이를 비교하기 위함이다. 총 150개의 치아를 각각 25개씩 6개의 군으로 나누었다. A군 Scotchbond Multi-Purpose (SBMP, 3M ESPE, St, Paul, MN, USA, 4세대 접착제)를 사용하고 유지구를 부여하지 않음. B군: SBMP를 사용하고 유지구를 부여. C군: BC Plus (Vericom Co., Anyang, Gyeonggido, Korea, 5세대 접착제)를 사용하고 유지구를 부여하지 않음. D군: BC Plus를 사용하고 유지구를 부여. E군: Adper Prompt (3M ESPE, Seefeld, Germany, 6세대 접착제)를 사용하고 유지구를 부여하지 않음. F군: Adper Prompt를 사용하고 유지구를 부여. 모든 치아는 복합레진인 Denfil(Vericom Co., Anyang. Gyonggido. Korea)을 이용하여 충전하였다. 수복 직후와, 수복 6개월 후에 modified USPHS (United States Public Health Service) criteria에 따라 수복물을 임상적으로 평가하였다. 추가적으로 임상사진을 촬영하였으며, 에폭시 레진을 이용하여 복제한 후 주사전자현미경을 이용하여 이를 관찰하였다. 6개월 후 관찰 결과. alpha rating의 수가 각 실험군마다 동일하지는 않았지만, 통계적으로는 3가지의 접착제간에 유의할만한 차이는 없었고, 기계적인 유지구를 부여한 군과 부여하지 않은 군 간에도 유의할만한 차이는 없었다 (p > 0.05). 그러나 6개월의 관찰 기간은 일반적으로 기대되는 레진의 수명보다 짧기 때문에, 각 실험군 간의 차이를 알아보기 위해서는 추후 더 오랜 기간의 관찰이 요구된다. The purpose of this study is to evaluate prospectively the effect of different bonding systems and retention grooves on the clinical performance of resin restorations in non-carious cervical lesions (NCCLs). Thirty nine healthy adults who had at least 2 NCCLs in their promolar areas were included in this study. One hundred and fifty teeth were equally assigned to six groups; (A) Scotchbond Multi-Purpose (SBMP, 3M ESPE, St, Paul, MN, USA, 4th generation bonding system) without retention grooves; (B) SBMP with retention grooves: (C) BC Plus (Vericom Co., Anyang, Gyeonggido, Korea, 5th generation bonding system) without retention grooves; (D) BC Plus with retention grooves; (E) Adper Prompt (3M ESPE, Seefeld, Germany, 6th generation bonding system) without retention grooves: (F) Adper Prompt with retention grooves. All cavities were filled with a hybrid composite resin, Denfil (Vericom Co., Anyang, Gyeonggido, korea) by one operator. Restorations were evaluated at baseline and at 6-month recall, according to the modified USPHS (United states Public Health Service) criteria, Additionally, clinical photographs were taken and epoxy resin replicas were made for SEM evaluation. At 6-month recall, there were some differences in the number of alpha ratings among the experimental groups. But, despite the differences in the number of alpah ratings, there was no significant difference among the 3 adhesive systems (p > 0.05). There was also no significant difference between the groups with or without mechanical retention (p > 0.05). Follow-ups for longer periods than 6 months are needed to verify the clinical performance of different bonding systems and retention grooves. 〔J Kor Acad Cons Dent 31(4):300-311, 2006〕

치과 기공사들에게서 나타나는 호흡기 증상과 이의 관련 요인

김웅철,오세윤,김지환,김진완,이준석,이가영,이세훈,유진호,김태석 高麗大學校 倂設 保健大學 保健科學硏究所 2001 保健科學論集 Vol.27 No.1

This study was carried out to investigate subjective respiratory symptoms and their attributable factors in Korean dental laboratory technicians. A questionnaire was mailed to randomly selected 1,900 dental laboratory technicians. Among them, 1,344 dental technicians completed the questionnaires and returmned them. Validity and reliability tests on the questionnaires were carried out before the main survey. To investigate risk factors on respiratory subjective symptoms, we performed analysis on distribution of characteristics, and then investigated univariate analysis and multiple logistic regression analysis. The prevalence rate of wheezing, cough and phlegm, and dyspnea was 4.8%, 33.9%, 54.9%, respectively. Statistically significant factors inducing subjective respiratory symptoms by multiple logistic regression analysis were sex, smoking, exercise, health examination, work hours a day, investment gas, investment dust, metal fume, resin vapor, and asbestos dust. Considering the results above, it seems that most subjective respiratory symptoms are related with health habits and occupational environmental-related factors. The result, consideration in mind, suggest that health promotion programs for smoking cessation, regular health examination, and physical exercise in health habit, and improvement on casting and resin work in dental technological environment be necessary.

백서에서 자가 피부이식후 항T임파구 단일클론항체 분포에 관한 면역조직화학적 연구

朴晩圭,金慶助,任昌俊,高世勳 단국대학교 치의학연구소 1991 논문집 Vol.3 No.-

This article is intended to study histopathological and immunohistochemical response after autogenous full-thickness skin graft in rat. 12 male Sprague-Dawley rats were used as the experimental animals. A 1 cm×1 cm skin (0.7mm diameter) was taken on the right inguinal area of the rat. Another full-thickness skin graft (1cm × 1cm) was taken from the left inguinal area of the rat. And it was transplanted to the right inguinal area of the rat. The left side wound was closed directly. Light microscopic observation was made at the postoperative 1, 3, 8, 16 day, after the hematoxylin-Eosin staining of the 4u-thick paraffin embedded specimens and the immunohistochemical staining of the 10u-thick frozen specimens with mouse anti-rat monoclone antibodies and ABC staining kit. The results were as follows. 1. Electromicroscopic studies revealed interstitial tissue bleeding of transplanted autogenous skin. The response was severe in the 1 day group after operation, moderate in 3 day group, mild in 8 day group, and almost resolved in the 16 days group. 2. Electromicroscopic studies also revealed a mild monocyte response in the 3 day and 8 day groups. A histiocytic infiltrate was observed. There was a mild response in the 3 day group and moderate response in the 8 day group. 3. Immunohistochemically studies revealed a few pan T cells in the 1 day group, mild appearance of pan T cells and cyototoxic T cells in the 3 day group, a moderate infiltrate of pan T cells and helper T cells in the 8 day group, and total resolution of pan T cells in the 16 day group. 4. According to these finding, a strong inflammatory response was observed around transplanted autogenous skin in the 3 & 8 day groups. In the 16 day group this response had resolved histopathologically and immunohistologically.

문신치료의 실험적 연구

張忠鉉,李斗炯,陳世勳 大韓成形外科學會 1987 Archives of Plastic Surgery Vol.14 No.1

In general social opinions of developed cultural state, tattoos induced psychological and social problems. Since Hellenic times, the removal of unwanted tattoos has been a challenge: for example, salabrasion, dermabrasion, LASER surgery, skin graft and cryosugery, etc. But the availability of manay methods for the removal of tattoos appears to indicate that there is no one absolute method. So we studied macroscopical color changes and microscopical histological changes in tattooed rabbits and rats, and overtattooed rabbits and rats. The results were as following: 1. Inflammatory reactions was nearly almost disapperared within 3 weeks. 2. The major fade―out of tattooed color was occurred from post―tattooing 5 days to 3 weeks. 3. Dye particle was located mainly in upper & mid dermis and it was not relafted with tattooing depth. 4. Masking effect of black colored tattoos was definitely improved in the overtattooing group. But complete masking was impossible.

스프레드시트 방식의 OLAP 인터페이스를 위한 시트 분할 기법

신성현,이수안,최훈영,김진호,문양세 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-

OLAP(Online-Analytical Processing) is widely used to analyze multidimensional data extracted from a huge size of source operational databases and to provide a useful information for business decision making. OLAP tools provide a variety of ways to analyze and to browse data which are not familiar with end users. But spreadsheet tools like MS Excel are very popular in real-world to calculate some statistics from source data and to analyze them. In this research, we implemented a spreadsheet-like tool on the top of relational databases to support OLAP operations and to browse the results of analytical queries. For implementing the tool, we propose a sheet partition function for spreadsheets which partitions a relational table into multiple sheet based on the number of rows or (dimensional) attribute values. This function can enable users to view a physically stored table as a set of spreadsheets like Excel thus users can browse the stored table as if it is spreadsheets. With this spreadsheet-like interface, users will be able to handle multidimensional data stored in relational databases in more user-friendly way.

生體血의 保存環境과 腐敗産物에 依한 血中알콜濃度變化에 關한 硏究

張成吉,金英雲,柳在薰,吳世珍,權五星,朴世延 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.-