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고강도 콘크리트(80MPa이상)를 이용한 콘크리트충전강관구조 적용을 위한 기초물성 연구
이장환,강용학,정근호,김진호,정상진,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
One of the most important reasons that CFT is used in many conditions is by using that we can achieve the effect, which reduce the section of the member. This research purpose to find the most ideal composition, which is achieved by the investigation in the concrete's property of matter like ability of Slump, Slump Flow, Air content, Bleeding, and Settlement when the high strength of concrete which is over 80MPa is used m the CFT column.
CFT구조용 초고강도 충전 콘크리트의 현장 적용을 위한 실험적 연구
이장환,남정민,정근호,김진호,정상진,최문식 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
Due to social problems such as the increasing of land price and the expanding of city, buildings require more complex and bigger components and structure. However, the complex and massive building projects need new technology to solve effect of local buckling and the needs for more space. Hence, Concrete Filled Tube Steel (CFT), the tube steel to hold concrete during pouring and curing of concrete procedure, which helps to reduce local buckling and space, was developed. Most researches on CFT might not be focused on the characteristic of concrete filled in tube but structural analysis. However, it is the essential factor to increase the strength of concrete on CFT for having efficient results. Therefore, this paper will describe how to apply CFT into the construction site through examining High Strength Concrete (800kg/cm2), the strength of core, and bleeding during pouring strategy.
유장렬,유문식,남부현 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2
Peritonsillar abscess occurs when the bacterial infection of the palatine tonsil spreads to the potential peritonsillar space deep behind the tonsil. Recently, the incidence of peritonsillar abscess was decreased due to the advent of antibiotics but not uncommon complication of acute tonsillitis. A clinical observation was performed on 42 cases of peritonsillar abscess who admitted to the department of otolarngology in Chungnam National University from Jan. 1986 to Sep. 1990. The obtained results were as follows : 1. The most frequently involved age group was third decade. 2. Most prevalent season was spring(33%). 3. Side of abscess was left in 23 cases and right in 19 cases. 4. Among 42 cases, 19 cases were performed of aerobic culture and 14 cases were performed of anaerobic culture. In aerobic culture, 6 strains of α-hemolytic Streptococci, 4 strains of β-hemolytic Streptococci and 1 strain of Enterobacter cloaca were found. In anaerobic culture, 1 strain of Peptostreptococci and 1 strain of anaerobic Streptococci were found. 5. 39 patients were treated with incision and drainage, 16 patients of these were treated with interval tonsillectomy. 3 patients were treated with antibiotics only.
서중조건하에서의 콘크리트 충전 강관 기둥의 시공을 위한 실험적 연구
이장환,강용학,정근호,김진호,최문식,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
The basic Physical properties, Slump, Slump flow, Air content, Bleeding, and Settlement of concrete was investigated to test Characteristic of Setting and to evaluate the relation between Model specimen and Heat of hydration for construction Over the High Temperature(CFT). The objective of this study is to take the partial core after the cementation of Model specimen, test the compression intensity and analyze the relation to Test piece.
장문식(Mun-Sik Jang),심상목(Sang-Mok Sim) 한국관세학회 2015 관세학회지 Vol.16 No.4
Korea Black Friday, k-Discount day order to transform into the country to purchase foreign direct, more large discounts to an event and price the seller has not allowed to execute a fraud Preparation and related institutions should a ban. Now Day sale to Korea Black Friday, k-Discount day inducing domestic price, promotions and discounts at from direct to buyers switched to domestic consumption Will be made. This study helps direct analysis check and causes, direct buyers for the purchase raised the need to switch to domestic procurement, and switch between them to seekDid. A future sale price factors such as the opinions of survey and generators business from sales of corporate and consumer opinions and analyze the need to.
최근 3년간 서울 지역 단일기관에서 급성 바이러스 간염의 원인
문장식 ( Jang Sik Mun ),김형준 ( Hyung Joon Kim ),허채 ( Chae Hue ),김상중 ( Sang Joong Kim ),문홍주 ( Hong Ju Moon ),이현웅 ( Hyun Woong Lee ),최창환 ( Chang Hwan Choi ),도재혁 ( Jae Hyuk Do ),장세경 ( Sae Kyung Chang ) 대한내과학회 2008 대한내과학회지 Vol.74 No.6
Background/Aims: Hepatitis A is increasing during the recent years in Korea, and sporadic cases of hepatitis E are not rare. We investigated the etiology of acute viral hepatitis, including 27 cases of coinfection with hepatitis A and E, during the last 3 years. Methods: Retrospective analysis of one hundred eleven patients with acute viral hepatitis at Chung-Ang University Hospital was done from January 2005 to July 2007. The patients were positive for any one of the following tests: IgM anti-HAV, IgM anti-HBc, HCV RNA and IgM anti-HEV. Results: The proportions of acute viral hepatitis A, B and C were 94.6% (105/111), 4.5% (5/111) and 0.9% (1/111), respectively. Among the patients with hepatitis A, 27 patients (24.3%) were positive for IgM anti-HEV. We analyzed 105 patients with either hepatitis A only or they had coinfection of hepatitis A and E. The mean age, the duration of the hospital stay, the mean levels of serum transaminase, bilirubin and albumin and the protrombin time were similar between the patients with hepatitis A only and those with coinfection of hepatitis A and E. All the patients were discharged without serious complication such as fulminant hepatic failure. The biochemical liver function tests were normalized in all patients within 8 weeks. Conclusions: The most common etiology of acute viral hepatitis in Koreans was the hepatitis A virus. Patients coinfected with hepatitis A and E were observed. The patients with coinfection of hepatitis A and E showed no significant difference in their clinical features and laboratory parameters, as compared to the patients with hepatitis A only.(Korean J Med 74:624-631, 2008)
응급실 내원 천식발작 환자수와 발작 중증도의 최근 변화 추세 -단일기관연구-
문장식 ( Jang Sik Mun ),최인선 ( Inson S. Choi ),심명기 ( Myoung Ki Sim ) 대한천식알레르기학회 2005 천식 및 알레르기 Vol.25 No.4
Background: There have been few studies concerning the change in asthma severity in Korea. Objective: To investigate the recent trend in the prevalence and severity of acute asthma at a hospital in Gwangju. Method: The charts of 332 adult asthma patients, who were selected randomly from 1,240 patients who visited the emergency department from 1996 to 2003 except 2000, were reviewed retrospectively. Result: The proportion of asthma to total visits increased progressively from 0.20% to 0.28%, 0.44%, 0.45%, 1.04%, 0.99%, and 0.98% (P<0.001). The proportion of patients with severe asthma attack (FEV 1< 50%) and the age also increased progressively (P<0.001, respectively), and there was increasing tendency in male sex. When compared between before and after 2000, the mean annual number of asthma patients increased 3.43 times from 87 to 298, and the mean proportion of asthma 2.90 times from 0.34% to 1.00%. The proportion of patients with severe asthma attack increased significantly (52.1 % vs. 69.5%, P < 0.01), and post-treatment FEV1 decreased significantly (69.l±2.6% vs. 63.3 ± 1.6%, P < 0.05). Conclusion: The prevalence and severity of acute asthma at a hospital in Gwangju was progressively increased from 1996 to 2003, with increases in age and the male sex, and irreversible airflow obstruction. (Korean J Asthma Allergy Clin Immunol 2005;25:284-290)
Mun-Jang Jeon,Won Il Choi,Kwang-Sik Choi,Yeong-Jin Chung,Sang-Chul Shin 한국응용곤충학회 2006 Journal of Asia-Pacific Entomology Vol.9 No.3
To understand influence of two species of parasitoids on host population dynamics, adult population dynamics of pine needle gall midge (PNGM), Thecodiplosis japonensis and two species of parasitoids, Inostemma matsutama and Inostemma seoulis were observed using emergence traps from 1986 to 2005. Density of PNGM decreased after outbreaks in 1986 and 1987 and showed density-dependent regulation. Relationships between density of PNGM and its parasitoids were linear except the period of outbreak regardless of parasitoids species. Relationships between host density and parasitism of I. matsutama and I. seoulis were density-independent and inverse density -dependent, respectively. I. seoulis was the dominant parasitoid against PNGM. Interspecific competition between two parasitoids was not strong and temporal niche segregation between two parasitoids was a possible mechanism for coexistence of two parasitoids. The parasitoid complex responded to changes in host density more sensitively than single parasitoid species. These results suggested that two parasitoid can stabilize PNGM population density without strong negative effects on each species of parasitoids.