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보육원 요충감염의 화학요법적 관리에 대한 1년간의 추적 관찰
김은령,홍성태,조승열 중앙대학교 의과대학 의과학연구소 1982 中央醫大誌 Vol.7 No.1
After the sigle anthelmintic treatment aganist Enterobius vermicularis, the egg positive rate returns to pre-treatment level within 20∼30 days. Therefore the antipinworm treatment should be repeated when the endemic enterobiasis is desired to be under control. Recently Hong et al.(1980) proposed a scheme of control in which mebendazole was administered to all residents for 4 times each 20-day interval. By the scheme, the pinworm infection was controlled up to 7 months in low endemic orphanages(mean egg positive rates less than 40%). However, in two highly endemic orphanages(55-70%), the infection was controlled only for 3 months. After then up to 7 months, reinfection occurred, but the egg positive rate was brought down to 20%. To observe the effect of 6-month interval repetition of the above scheme on the control of highly endemic enterobiasis in orphanages, this study was undertaken for one year in the hope of complete control. In three orphanages situated in Anyang City, Kyunggi Do(mean egg positive rates of anal swab being 74%, 80% and 84% in respect), 100㎎ single dose of mebendazole were administered to all orphans and their nursing staffs for 5 tomed each 20-day interval. They were followed up each month by anal swab until 6 months after the beginning of the scheme. The egg positive rates became 0% until 110 days after the institution of the scheme. However, the ratesgradually rused to 3.6%∼12.3%, in all of 3 orphanagesuntil 6 months. Then the second scheme of treatment was tried. Mebendazole was administered for 3 times also each 20-day interval. The egg positive rates again dropped to 0% until 270 days. However, the rates abruptly began to rise to 12.1% on 300 dats, 22.7% on 330 days, 24.8% on 360 days. The rising of egg positive rates was about 40 days after introduction of infected but untreated new-comers to all of 3 subjected orphanages. If the orphanages were the closed society, the hyperendemic enterobiasis would be controlled by repeating the scheme every 6 month. The failure to control the enterbiasis in this observation suggests that the reintroduction of eggs from outside was the main factor of recurring endemicity though the pinworms inside the orphanages were almost completely cleared.
洪鍾旭,全在琪,諸商律,李愚升,崔炡,金龍洙 慶北大學校 1976 論文集 Vol.21 No.-
Present cropping system of the paddy field and it's demeloment were investigated from the 75 houses at Noi Ⅰdong, Nongong myun, Dalsung gun Gyungbuk Province. The results obtained were as follows; Ⅰ. Present status of the cropping system at the paddy field. a) Total area of paddy field was 42.2ha, of which 9.5% was completely irrigated, but the rest was incompletely irrigated or rainfall dependant. b) Major crops were rice, barley, wheat, potato, oriental melon, and onion. There were six different5 cropping systems such as rice+barley type, 75.8%, rice+wheat, 10.4%, rice+potato, 2.1%. rice+oriental melon, 1%, and rice+onion, 0.5%, and single rice growing system. The land utilization was 189.7% due to the double cropping systems. c) Leading varieties of rice were Palgweng, 96.8%, Tongil, 2.9%, and Milynng No. 15, 0.3%. Jaechun No.5 and Dong barley were the leading barley varieties, and new varieties were in a little use. d) Average yields of Palgweng and Tongil were 459kg and 768kg per 10a as unhulled rice, respectively. Jaechun No. 5 and Dong barley were yielded 234kg and 228kg per 10a. e)Onion was cultivated from 1974 and oriental melon from 1975 as new economic crops, but cultivation methods for these new crops were not well adopted. 2. Development of the cropping system for paddy field. a) New seven typee of cropping system for paddy field were established, and they were rice+barley, rece+wheat, rice+potato, rice+onion, rice+garlic, and rice+oriental melon including single rice growing system. Standard cultivation methods were adopted for each cropping system. b) New economic rice varieties recommended for this village were Youngnam Joseng, Yooshin, and Joseng Tongil, while Milang No.6 of barley variety was recommended as back cropes of above rice varieties. c) Yongnam Joseng is expected to yield 533kg per 10a as hulled rice. The yield of this new variety will be higher than that of Palgweng by 58 prcent. The yield of Milyang No.6 is about 391kg per 10a as unhulled barley, which is higher than that of Jae chun No.5 by 67 percent. d) For the increased yield of these new economic crops, the standard cultivation methods must be employed.
홍영습,김정만,김성률,정갑열,김준연,김병권,담도온 동아대학교 부설 산업의학연구소 1997 산업의학연구소 논총 Vol.- No.3
In order to study the effect of welding fume exposure upon the pulmonary function test, we examined 131 shielded arc welding workers, and 152 CO₂arc welding workers as cases and 177 control workers for their general characteristics, and forced vital capacity (FVC), forced expiratory volume in one second (FEV 1.0), forced expiratory volume in one second as a percent of FVC (FEV1.0%), and maximal mid-expiratory flow (MMF) were obtained from the spirogram. In shielded arc welding group and CO₂arc welding group, FVC,FEV 1.0,FEV 1.0%, and MMF were significantly decreased than control group, especially marked in the MMF finding. The distribution of workers below normal range was as follows: in the shielded arc welding group, 2 workers(1.5%) for FVC, 17 workers(13.0%) for FEV 1.0, 5 workers(3.8%) for FEV 1.0, 28 workers(21.4%) for MMF, and in the CO₂arc welding group, 3 workers(2.0%) for FVC, 25 workers(16.4%) for FEV 1.0, 8 workers(5.3%) for FEV 1.0%, and 37 workers(24.3%) for MMF, and significant increase by exposure duration was found in MMF. The distribution of workers who had ventilation impairment was as follows: 5 workers(3.8%) for obstructive type, 2 workers(1.5%) for restrictive type in the shielded arc welding group, and 7 workers(4.6%) for obstructive type, 2 workers(1.3%) for restrictive type, and 1 worker(0.6%) was combined type of the CO₂arc welding group. In the respect of these results, the significant pulmonary function and ventilatory impairment were observed in welding fume exposed workers who had not abnormal finding in chest X-ray, and MMF considered as the most sensitive pulmonary function index by welding fume exposure. Therefore even if it is hard to doing pulmonary function test in the first health examination of workers according to the Industrial Safety Health Act in the welding fume exposure workers, it is desirable to consider doing PFT. Also evaluating the ventilation impairment, it is necessary to observe the change of MMF that marker of effort independent portion.
음향방출기술을 이용한 원자력발전소 제어밸브 유체누설 상시감시에 관한 연구
이상국(Sang-Guk Lee),박종혁(Jong-Huck Park),이선기(Sun-Ki Lee),유근배(Keun-Bae Yoo),홍승열(Sung-Yull Hong) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The purpose of this study is to verify availability of the acoustic emission in-situ monitoring method to the internal leak and operating conditions of the major valves at nuclear power plants. In this study, acoustic emission tests are performed when the pressurized temperature water and steam flowed through glove valve for high pressure turbine condensing water dump and main steam condensing water control on the normal size of 1-1/2, 2-1/2 and 2 . The valve internal leak monitoring system for practical field was designed. The acoustic emission method was applied to the valves at the site, and the background noise was measured for the abnormal plant condition. To improve the reliability, a judgment of leak on the system was used various factors which are AE parameters, trend analysis, frequency analysis, voltage analysis and amplitude analysis of acoustic signal emitted from the valve operating condition internal leak.
이상주,박경일,김원술,정갑열,김준연,김양석,홍영습 동아대학교 부설 산업의학연구소 1995 산업의학연구소 논총 Vol.- No.2
For the purpose of presenting the basic data for the establishment of control measures on the long-term noise exposed workers, this study was carried out on the relationship between personal noise exposed dose and hearing loss on the 67 male workers whose hearing threshold had exceeded 40 dB in 4,000Hz, from 1990 to 1992. Conclusively, the level of hearing loss was significantly related to personal noise exposed dose in follow-up period. We considered that personal noise exposed dose which was measured by the personal noise dosemeter was more efficient rather than the noise level of workplace for the evaluating the long-term change of hearing acuity. And although in the case of not-diagnosed as noise induced hearing loss, it was suspected that the active control programs such as improvement of noisy environment or early transfer to proper workplace were needed on the workers who exposed with over 90dB in personal noise exposed dose.