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李孝福,李吉弘,秋現植 조선대학교 기초과학연구소 1987 自然科學硏究 Vol.10 No.1
In this paper, the metalIurgical analysis of repairweldings which is used the five kinds of welding-rod was investigated. Especially, it surveyed the metal structure in order to find out which one among the five welding-rods similar to base metal SC-42, tire mould. Main analytical results could be summmerized as follows: 1) Soft steel usually is used to the soft steel welding-rod but the analytical results could be found that it is better to use the high strength steel than to use the soft steel welding-rod. 2) Base metal SC-42, tire mould is much better to use LC-300 than to use SC-200 or LH-100 welding-rod, because both are the same cost but the mechanical properties of LC-300 weldingrod is superior to SC-200 or LH-100 3) It is appropriate to use the LC-300 or LC-318 welding-rod to do the difficult repair-weldings because these are the same metal structure without the thermal treatment.
장상피화생과 Helicobactor pylori와의 상관 관계에 관한 연구
이복희,김대수,이현숙,진영주,윤세진,송형근,성노현,정현용,이동호 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2
In 1965 Lauren divided advanced gastric carcinoma into two main types-namely, "intestinal" and "diffuse" type carcinoma, which differ not only morphologically but also in their clinical and epidemiological characteristics. Moreover, a different histogenetic process has been postulated by many authors that intestinal type gastric carcinoma might arise from areas with intestinal metaplasia. Since Warren and Marshall reported the presence of Helicobacter pylori in the stomach in 1983, strong evidence has been obtained that there is a close relationship between Helicobacter pylori and chronic gastritis, atrophic gastritis, intestinal metaplasia, and intestinal type gastric carcinoma. To study the relationship between intestinal metaplasia and Helicobacter pylori infection, we performed gastroscopic biopsies and CLO tests taken from patients with epigastric pain. Only 87 patients with macroscopically suspected antral gastritis were included. The prevalence of intestinal metaplasia in gastric antral biopsies increased from 33.3% in the age group<30 years to 63.6% in the age group 60 years. When all patients were divided into two age groups-namely, (i)<50 years(n=41) and (ii)≥ 50 years(n-=46), intestinal metaplasia was found significantly more often in patients ≥ 50 years. ((i) 39.2%, (ii) 54.3%, p<0.0001). The prevalence of Helicobacter pylori in gastric antral biopsies decreased from 66.7% in the age group<30 years to 62.5%, in the age group in the age group 50 to 59 years. When all patients were divided into the same two age groups-namely(i)<50 years and (ii)≥50 years, the prevalence of Helicobacter pylori did not differ between two groups in a statistically significant way. The mean age of intestinal metaplasia positive patients who were also Helicobacter pylori positive was 48±11.0(mean±S.D.)years, whereas the mean age of intestinal metaplasia positive patients who were Helicobacter pylori negative was 52±9.7(mean±S.D.)years. In conclusion. although our data do not prove a causal relationship between Helicobacter pylori infection and the histogenesis of intestinal metaplasia, we suggest that Helicobacter pylori plays an important role in the development of intestinal metaplasia in the gastric mucosa. Whether Helicobacter pylori has to be present at all times during this process or is only necessary as a 'trigger', needs further research.
한국과 러시아(구소련) 마라톤 선수들의 스포츠 성과에 관한 비교 분석
김익겸,이종희,김복현 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-
According to the result of sport achievement of Korean and Russian marathoners(Soviet Union) through regression analysis, it can be concluded following this: 1.Korean marathoners have more good result than Russian marathoners, and Success of Korea marathon is classified by three stages First, in 1930's under Japanese colony Korea marathon had succeeded in LA Olympics(1932) and Berlin Olympics(1936). Second, From 1947 to 1957 Korean marathon had succeeded in commercial marathon race. Third, In 1990's the succession of Barcelona(1992) and Atlanta(1996) Olympics and succession of Asian Games(1990,1994,1998). 2.The succession of Russian marathon is classified by two stages. First, from 1946 to 1962 and 1978, the succession of European Championship. Second, the succession of Moscow Olympics.
강선희,김미련,김선자,김현옥,노복자,이기화,이정숙 曉星女子大學校 藥學大學 學生會 1988 曉星藥誌 Vol.4 No.-
2, 3; 5,6-di-O-isopropylidene-α-D -mannofuranose(ManA) were oxidized to their cor-responding 2, 3;5,6-di-O-isoprolylidene-α-D-manno-1.4-lactone(ManB) using calcium chlorite as oxidant in a phase transfer catalysis system. But identified results were not obvious. V_2O_5 catalzed oxidation of primary and secondary alcohols to aldehydes and ketones respectively at alkali conditions under Solod-Liquid phase transfer conditions. This reaction affords good overall yields of products without formation of undersirable.
Efficacy of Initial Treatment with Clevudine in Naive Patients with Chronic Hepatitis B
( Hyeon Woong Yang ),( Byung Seok Lee ),( Tae Hee Lee ),( Heon Young Lee ),( Kwan Woo Nam ),( Young Woo Kang ),( Hee Bok Chae ),( Seok Hyun Kim ),( Seok Bae Kim ),( Hyang Ie Lee ),( An Na Kim ),( Il H 대한내과학회 2010 The Korean Journal of Internal Medicine Vol.25 No.4
Background/Aims: Clevudine, a pyrimidine nucleoside analogue, has potent antiviral effects in patients with chronic viral hepatitis B (CHB). We report the efficacy of initial treatment with clevudine in naive patients with CHB living in Daejeon and Chungcheong Province, South Korea. Methods: One hundred five adults with CHB were administered 30 mg of clevudine per day for an average of 51 weeks. We evaluated viral markers and liver biochemistry retrospectively every 3 months. Results: Alanine aminotransferase (ALT), aspartate aminotransferase (AST), and hepatitis B virus (HBV) DNA before the treatment were 184 ± 188 IU/L, 150 ± 138 IU/L, and 7.1 ± 1.2 log copies/mL, respectively. Undetectable rates (< 60 IU/mL) of DNA were 36.2%, 68.9%, 83.6%, 76.2%, and 75.8% at 12, 24, 36, 48, and 60 weeks, respectively. Seroconversion rates were 9.1%, 13.6%, 24.6%, 26.5%, and 26.1% and ALT normalization rates were 64.5%, 78.1%, 87.9%, 90.0% at 12, 24, 36, and 48 weeks, respectively. Six patients (5.7%) had a viral breakthrough. Conclusions: Clevudine is a useful drug in the initial treatment of patients with CHB, with a potent antiviral effect and low incidence of viral breakthrough. (Korean J Intern Med 2010;25:372-376)
Lee Kyung-Hee,Lee Sun-Bok,An Chang-Hyeon,Heo Min-Suk,Yi Won-Jin,Huh Kyung-Hoe,Park Moo-Soon,Lee Sam-Sun,Choi Soon-Chul Korean Academy of Oral and Maxillofacial Radiology 2004 Imaging Science in Dentistry Vol.34 No.4
Purpose: The purpose of this study is to examine the effects of X-ray beam angulation on the fractal dimension of trabecular bone structure of human dry mandible using the tile counting method. Materials and Methods: We divided 5 human dry mandibles into an angle and a molar groups depending on the regions and deciding the region of interest (ROI). When contrasted with the ROI, the inferior cortex was appointed to be low and the lines perpendicular to the buccal cortex were appointed to be the standard angle. Direct digital intraoral radiographs were obtained from 9 different projection angles. We analyzed statistically the fractal dimension using the tile counting method. Results: There was a statistically significant difference in the fractal dimension of the regions and the mandibles, but there was no statistically significant difference in the fractal dimension according to the X-ray beam angulation. Conclusion : There is no statistically significant effect of the angle of the projection on the fractal dimension of trabecular bone structure of a human dry mandible according to the tile counting method.
이복희(Bok-Hee Lee),조정현(Jeong-Hyeon Joe),이봉(Feng Li),김종호(Jong-Ho Kim),이승주(Seung-Ju Lee),김기복(Ki-Bok Kim),김태기(Tae-ki Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
The impedance of a vertical grounding electrode is not lowered by expanding the dimension of the grounding electrode, and the length of thr vertical grounding electrode which shows the minimum value of the grounding impedance for each condition of frequency and soil characteristics is existent, and it is defined as Critical length. In this paper, the critical lengths for the vertical grounding electrodes are calculated by using the distributed parameter circuit model. The adequacy of the simulations has been confirmed by comparing the simulated results with the measured results.