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Moon, Jeong-Ho,Shin, Kyung-Jae,Lim, Jae-Hyung,Lee, Sun-Hwa Korea Concrete Institute 2000 KCI concrete journal Vol.12 No.1
The research purpose of this paper is to investigate the influential Parameters on the unbonded tendon stress. The parameters were the reinforcing ratio, the prestressing ratio, and the loading type. To this end. first, the influence of parameters were examined with twenty eight test results obtained from references. Then, an experimental study was carried out with nine specimens. Test variables were the reinforcing ratio and the prestressing ratio. Specimens were divided equally into three groups and each group had a different level of the reinforcing ratio. Each specimen within a group has a different level of the prestressing ratio. The investigation with previous and current tests revealed the followings; (1) the length of crack distribution zone does not have a close relation with the length of plastic hinge. (2) the prestressing ratio does not affect both the length of crack distribution and the length of plastic hinge, (3) the tendon stress variation is in reverse relation with the ratios of mild steels and tendons, (4) the loading type nay not affect significantly the length of crack distribution zone, (5) AASHTO LRFD Code equation and Moon/Lim's design equation predicted the test results well with some safety margins.
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.
망간 노출 근로자의 정신 ·신경행동 양상에 영향을 주는 요인
문영한,권기련,김은아,김규상,김양호,김재우,노재훈,양정선,진영우 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.2
The risk posed to human health by environmental manganese (Mn) exposure is unknown. The purpose of this study is to establish if subclinical effects related to Mn exposure and examine the factors influencing psychoneurobehaviral outcomes of Mn exposed workers. This study involved 121 male workers of welding, alloy furnace, and manufacturing of welding stick. Study investigations include: a questionnaire covering demographic characteristics, job and exposure history and medical symptoms and conditions, monitoring workplace air for personal exposure to respirable and inhalable manganese, analysis of blood and urine samples, psychoneurobehaviral test(neurobehaviral core test battery(NCTB), signal change on magnetic resonance imaging (MRI) scans, minimental state and neurological examination). The main results of this study were as follows; 1. Preliminary results showed that, with increasing manganese exposure, neurobehaviral performance was poorer and signal change on MRI scans increased. 2. The results of examination revealed significant relations on psychoneurobehaviral outcomes (neurobehaviral performance, signal change on MRI scans, and neurological features). 3. In multiple regression, age and educational status as demographic variables and exposure level were significantly related to neurobehaviral test. Also exposure level and serum Mn concentrations were positively related to signal change on MRI scans and neurological features affected by Mn on the brain (signal change). 4. Psychoneurobehaviral outcomes from Mn exposure were related to neurobehaviral performance, signal change on MRI scans, neurological features and profile of mood states (POMS), and influenced positively with age, alcohol and smoking history, and duration of Mn exposure, negatively with educational status. Serum Mn concentrations in combination with brain MRI scans, and perhaps a battery of neurobehaviral tests, appear to be the best way to monitor excessive exposure to Mn. These results are consistent with our knowledge on Mn action on the brain and are similar to the type of neurobehaviral dysfunction. They suggest that there may be age, educational status, and life style (alcohol and drinking history) differences with chronic environmental exposure. These findings suggest further evaluation, particularly on relationships between Mn exposure, aging, and susceptibility factors.
슬개골 연골 연화증 환자에서 시행한 관절경하 외측지대 절개술
선재영,한재석,문영래,김광 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2
Purpose : The purpose of this study is to evaluate the usefulness of arthroscopic lateral release in the management of chondromalacia patellae. Materials and Methods : The subjects were 48 patients ranging from 36 to 61 years of age. All patients were diagnosed to have chondromalacia patellae by physical examination. Arthroscopic lateral retinacular release of the knee has been performed on the patients under supine position. The results were reviewed at one year and three years after operation. Results : Of those who had grade I chondromalacia, 83.3% had a good at one year and by three years 75% were still good. Although grade III had 63.6%, the number of good results dropped to 36% by three years. Conclusion : Arthroscopy lateral retinacular release is effective for a correct classification of cartilaginous lesions, and it has a useful role to play in the management of early stage chondromalacia patellae.
문재선,김성용,김춘곤 朝鮮大學校 附設 醫學硏究所 1986 The Medical Journal of Chosun University Vol.11 No.1
Xanthogranulomatous pyelonephritis is rare form of chronic pyelonephritis, characterized by multiple yellowish nodules and secondary inflammatory change as necrotic area or abscess cavity grossly and infiltration of macrophage, mononuclear cell microscopically. A case of xanthogranulomatous pyelonephritis in a 25-yearold female is presented with a brief review of the literatures.
이영문,손재환,김선일,정희철 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
In this study, a series of FE-simulations, using the DEFORM software, on tool stersses of orthogonal cutting are carried out. As cutting input conditions, the tool shape factor such as tool relief angle and the cutting velocity are changed in the analyses. The results reveal that the patterns of stress distribution are same, that is signs of stress are divided at the points, wherever the chips leave the tool. And as the relief angle increases the more sterss concentration occurs at the tool tip.