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신경회로망에 의한 용접 결함 종류의 정량적인 자동인식 시스템 개발에 관한 연구
김재열,김영석,김병현,유신,김훈조,정진홍 한국공작기계학회 1997 한국생산제조학회지 Vol.6 No.1
A neural network approach has been developed to determine the depth of a surface breaking crack in a steel plate from ultrasonic backscattering data. The network is trained by the use of feedforward three-layered network together with a back-scattering algorithm for error correction. The signal used for crack insonification is a mode converted 70˚ transverse wave. A numerical analysis of back scattered field is carried out based on elastic wave theory, by the use of the boundary element method. The numerical data are calibrated by comparison with experimental data. The numerical analysis provides synthetic data for the training of the network. The training data have been calculated for cracks with specified increments of the crack depth. The performance of the network has been tested on other synthetic data and experimental data which are different form the training data.
아미노산 투여가 운동중 싸이클선수의 젖산 및 심박수에 미치는 영향
이승국,유병렬,김문희,김완조,이선장 韓國體育大學校附屬 體育科學硏究所 1992 韓國體育大學校附屬 體育科學硏究所論文集 Vol.11 No.1
The purpose of the study was to determine whether a 15.6mg.Kg ??' does of glutamate given one hour prior to incremental exercise test would reduce the lactate formation. Five well trained cyclists served as subjects in this experiment which included a placebo and glutamate trial. The subjects initially work on treadmill 200m/min for 3 minutes and here increased the workload by 20m/min every 3minutes until exhaustion. Blood lactate were collected from finger-tip. Subjects in the glutamate trial showed significantly lower lactate formation during exercise then they did in the placebo trial. In both groups no significant difference was found on heart rate. During the recovery lactate and heart, rate were unaltered in either the glutamate or placebo trials. In summary, glutamate ingestion may reduce lactate formation resultly improvement of performance.
曺永喆,千丙烈,金斗熙,朴任坰,宋善祐 慶北大學校 醫科大學 1987 慶北醫大誌 Vol.28 No.2
접객업소종사자들의 B형간염 표면항원 양성율 및 감염율을 알아보고 위험직장군을 찾아내기 위하여 대구시내 중구보건소에 등록된 8,060명의 접객업소 종사자들을 대상으로 혈액을 채취하여 HBsAg 및 anti-HBs 검사를 RPHA방법을 이용하여 실시하였다. HBsAg 양성율은 6.0%, anti-HBs 양성율은 23.4%로서 HBV감염율은 29.4%이었다. HBsAg 양성율은 남자(7.2%)가 여자(5.4%)보다 유의하게 높았다(p<0.01). 직장별 HBsAg 양성율은 음식점이 5.7%, 다방 6.0%, 살롱·나이트클럽 5.8%, 이·미용소·목욕탕 6.7%, 호텔·여관 7.7%, 음식점제조업 6.6%이었으며 남자가 여자보다 높은 양성율을 보였으나 호텔·여관에서는 남자가 3.7%로서 여자의 10.2%에 비해 오히려 낮게 나타났다. 연령별 HBsAg양성율은 남자에서는 연령별로 큰 차이는 없었지만 여자에서는 19세미만에서 7.8%로 가장 높게 나타났다. 위의 결과로 보아 접객업소종사자들의 HBsAg양성율은 일반인에 비해 크게 높지 않았지만 호텔·여관의 여종업원들에서 가장 높게 나타나서 이들에 대한 상세한 조사가 필요할 것으로 생각된다. 접객업소 종사자들의 근무양상을 고려할 때 이들에 대한 B형간염백신의 예방접종을 취업초에 반드시 실시할 것이 요먕된다. To identify the prevalence of HBsAg and the occupation of possible risk for hepatitis B, a total of 8,060 serum samples were collected from personnel in service trade registered at Junggu health center in Taegu city. These serum samples were tested for the presence of hepatitis B surface antigen(HBsAg) by reverse passive hemagglutination(RPHA), and for antibody to hepatitis B surface antigen(anti-HBs) by passive hemagglutination(PHA). HBsAg was detected in 6.0%, anti-HBs in 23.4% of the study population and serologic evidence of hepatitis B infection(HBsAg or anti-HBs positive) was 29.3%. HBsAg was significantly more prevalent in males(7.2%) than in females(5.4%)(p<0.01). Prevalence of HBsAg was 5.7% in employees of restaurant, 6.0% in coffee shops, 6.7% in hairdresser's shop and publc baths, 5.8% in salon and night clubs, 7.7% in hotel and inns, and 6.6% in food industries. In hotel and inns, HBsAg was most prevalent than any other occupations and more prevalent in females(10.2%) than in males(3.7%). Age-specific positive rate distribution of HBsAg revealed that the prevalence of HBsAg was higher in males than in females after age 20 years and that the prevalence of HBsAg was variable with age, but before age 20 HBsAg in female(7.8%) was higher than in male(6.7%). This study data suggest that HBsAg is not more prevalent in service personnel than in general population, that their age and sex distribution of HBsAg may be sufficient to account for the possible risk of transmission of hepatitis B in service personnel especially among women working in hotel and inns. Accordingly, occupational category and service personnel with high risk for acquisition or transmission of hepatitis B were those workers in hotal and inns. Thus it is recommended to survey all the risk factors for hepatitis B and to immunize all the susceptible service personnel with hepatitis B vaccine at the finding employment much as possible.
( Kwang Yeol Kim ),( Yo Han Choi ),( Abdolreza Hosseindoust ),( Min Ju Kim ),( Joseph Moturi ),( Tae Gyun Kim ),( Chang Hyun Song ),( Jun Hyung Lee ),( Byung Jo Chae ) 한국축산학회(구 한국동물자원과학회) 2020 한국축산학회지 Vol.62 No.3
The reproductive performance of lactating sows was investigated by using different feeding methods including conventional feeding (CF, 3 times/d) or free feeding (FF), and different dietary energy level including low energy (LE: 3,300) or high energy (HE: 3,400 kcal/kg) during the hot season. A total of twenty-eight crossbred (Yorkshire × Landrace) sows were distributed into four treatments as a 2 × 2 factorial arrangement. Sows in the FF group showed lower body weight and backfat loss (p < 0.05) compared with the CF group. Backfat loss during lactation was lower (p < 0.05) in sows fed HE diet than in that fed LE diet. There were no significant differences in litter survival rate and weaning to estrus interval, but the litter weight at weaning was improved (p < 0.05) in FF and HE sows. Hence, it is concluded that using the free-feeding system or increased dietary energy density leads to improved sow performance during hot ambient temperature.
천병렬,김권배,김기식,김영조,김윤년,김창윤,박의현,신동구,심봉섭,이종주,이충원,장성국,전재은,조용근,채성철,최지용,하영애,이영숙 경북대학교 의학연구소 1999 경북대학교병원의학연구소논문집 Vol.3 No.1
To estimate the incidence rate of coronary heart disease in Korea, of all residents in Taegu city aged 25 or above, those who had an acute MI or a fatal coronary event between 1 July 1996 and 30 June 1997 were registered. Seven hundreds and eight patients were registered during the study period(685 were identified at hospital and 23 were autopsy cases). Age-standardized annual incidence rate of men in city area was 93 per 100,000(95% CI; 61-142) and 33(95% CI; 16-67) in women(100 in men and 20 in women aged 35-64). The incidence was rapidly increased after age 40 in men, however, in women after age 60. Twenty-eight-days case fatality rate was 45% in men and 47% in women. However, in the age group of 45-59 case fatality rate in women was two times higher than that in men. In conclusion, crude annual incidence rate of CHD in city area was 73 per 100,000 in men and 33 in women. The age-standardized annual incidence of CHD in men(93 per 100,000) was 2 times higher than that in women (33 per 100,000) in Korea.