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황창환(Chang Hwan Hwang),백승욱(Seung Wook Baek),한조영(Cho Young Han),김수겸(Su Kyum Kim),전형열(Hyung Yeol Jeon) 한국연소학회 2012 KOSCOSYMPOSIUM논문집 Vol.- No.45
The droplet behavior of 83.9 wt.% HAN water solution was investigated experimentally with various ambient temperature and nitrogen environment. At the initial stage of evaporation under thermal decomposition temperature of HAN, gradual decreasing of droplet diameter was observed. After that, the droplet started to expand due to the internal pressure build up by water nucleation inside the droplet. The micro explosion was observed at higher temperature than the decomposition temperature of HAN and the remaining droplet showed similar behavior of single composition droplet. The decreasing rate was augmented as the ambient temperature increasing.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
비침습적 검사를 이용한 수술후 하지 심부 정맥 혈전증의 감시
김영욱,정한준,윤봉호,김신윤,이상국,변경환,김태헌 경북대학교 병원 1997 경북대학교병원의학연구소논문집 Vol.1 No.1
Deep vein thrombosis is recognized as a common complication in surgical patients in western countries especially in patients with high risk factors. The purposes of this study were to detect leg DVTs in early postoperative period by non-invasive surveillance and to analyze the risk factors of DVT. One hundred seventy one patients who underwent major operations(67 curative resection of colorectal cancer, 64 total hip replacement, 38 femur operation for fracture, and 2 colon resections for benign colon disease) were included for the prospective surveillance of leg DVT within 2 weeks after the operations. For the surveillance of leg DVT, strain gauge plethysmography(SPG) and Duplex scanning of both legs were completed for all patients except 10 patients. These 10 patients were examined in only one leg. The patients with past history of leg DVT or under prophylactic anticoagulant therapy were excluded from this study. To determine the risk factors related with leg DVT formation, age and sex of the patients, indication of surgery or surgical procedures, duration of operation, position during the operation, duration of postoperative immobilization, and preoperative serum level of antithrombin III (AT- III) were analyzed using Chi-square test. After performing SPG of 342 legs, 38 legs, showed abnormal on venous outflow/venous capacitance discriminant line chart, and 13 legs of 12 patients showed the finding(s) suggesting DVT on duplex scanning. Among the patients with abnormal duplex findings, 7 limbs(53.8%) were symptomatic, but the remaining 6 legs were silent. In 6 (15.8%) patients of 36 femur operations, 3(4.7%) of 64 total hip replacements and 3(4.5%) of 67 curative resections of colorectal cancer developed DVT by duplex scanning in the iliac(5), femoral-popliteal(6), and isolated calf(2) veins. After analyzing the risk factors, we could not find any statistically significant(p<0.05) factor related with leg DVT.
한국인 집단에서 미토콘드리아 DNA의 'Asian-specific 9-bp결실'다형현상
김욱,진한준 단국대학교 1999 論文集 Vol.34 No.-
Length changes in mitochondrial DNA (mtDNA) offer a useful marker for the study of female aspects of human population history. One such length change is the intergenic COⅡ/tRNA^Lys 9-bp deletion, which the region usually contains two tandemly arranged copies of a 9-bp sequence (ccccctcta) in human mtDNA. This deletion has been reported at varying frequencies in populations from Asia. Polynesia, the New World, and sub-Saharan Africa. This genetic polymorphism of mtDNA was analyzed in samples from 171 unrelated individuals from the Korean population and compared the frequency and distribution of 9-bp deletion with other Asian population. The frequency of the 9-bp deletion was found to be 17.5% (30/171) in the Korean populations. Uncommonly, a new insertion allele of approximately 6-bp in the intergenic COⅡ/tRNA^Lys region in the Korean population (2/171) was first identified in this study. East Asian populations including Chinese. Japanese, and Koreans were relatively homogeneous in the frequency of 9-bp deletion. with the exception of the low frequency of this deletion in Mongolians. On the other hand, Indonesians and Malaysians of Southeast Asian populations were found to show relatively high frequencies of the 9-bp deletion. Based on results of the frequencies of the 9-bp deletion, the Japanese population appeared to have a closer genetic relationship to Koreans than to the other surveyed Asian populations. Therefore, the results of this study also supported the hypothesis that a large amount of the gene pool in mainland Japanese was derived from the continental gene flow after the Yayoi Age.
투명표본에 의한 C-shaped canal 의 근관형태에 관한 연구
김한욱,이정식 大韓齒科保存學會 1990 Restorative Dentistry & Endodontics Vol.15 No.2
AbstractForty extracted human mandibular second molars with C-shaped canal were chosen to study the anatomy of the root canal.The experimental teeth were injected with china ink, decalcified and cleared with Winter green oil, in vitro, to study the number of root, root canal, canal per root, frequency and location of lateral canal and transverse anastomosis. 1. All teedth had one root. 2. Mesial roots with two canals were 25%, and mesial roots with one canal were 75%. All distal roots had one canal. 3. In the roots with two canals, the common apical foramen appeared in 20% and the separte apical foramen appeared in 80%. 4. The frequence of lateral canal was 33.3% and the most frequent region was middle 1/3. 5. All teeth had the transverse anastomosis in all region of the roots.
한강시민공원 체육시설 현황과 효율적 활용 방안에 대한 연구
한진욱,김진호 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-
The aim of this study is primarily to examine the current state of the sports facilities for the Han-Gang Citizens' Park and to propose its effective utilization plans for the coming 21st century. The main findings and conclusions can be described as follows: 1.Strengthening of publicity fucntions 2.To provide citizens with various means of easy access to the Park such as shuttle buses and samaul buses 3.Developments of new programs for the disabled and senior citizens 4.Extensive utlization measures for the evening hours 5.To make the Park distictive according to each distict 6.Reorganization of the Parks' administrative structures 7.Diversification of programs, and training and retaining instructors of an excellent caliber.
판폭두께비에 따른 콘크리트 충진 HSS 가새부재의 구조성능
한상환,김욱태 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2
The purpose of this study is to evaluate the effect of width-thickness ratio (w/t ratio) on structure performance of concrete-filled Hollow Structural Section(HSS) bracing members. It has been found that bracing that experience more rapid strength deterioration and earlier fractures with increasing their w/t ratio. In order to reduce such poor behavior of bracing members having a large w/t ratio, concrete filled tubular bracing members can be used. This study investigated the effect of infilled concrete on bracing members having different w/t ratios. Experimental tests were carried out using quasi-static reversed cyclic loading with a symmetric compression and tension. Five full-scale test specimens were made. The test results showed that concrete filling delayed the occurrence of initial local buckling. Infilled concrete also changed the local buckling mode and reduced the severity of local buckling, thereby the occurrence of cracking and fracture in the concrete filled specimens were delayed. Furthermore, this study showed that infilled concrete is more influential to the specimens having a larger w/t ratio.