우리나라 일부 석면사업장의 석면폐 유병률

백도명,백남원,최정근,손미아,임정기,이원진,문영한,박정선,최병순 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.1

Asbestos industry has been in operation over 60 years in Korea. However, the prevalence of asbestosis has not been yet reported. With rapid turn-over of workers, previous cross-sectional studies of current workers on the job could not find cases with exposures long enough for the development of asbestosis. This study was done to evaluate asbestosis prevalence of those worksites with operation history of more than 20 years. In total, 139 workers from 5 worksites were examined. Asbestos industries covered in the study include 2 asbestos textile, 1 brake lining, and 2 ship repairing worksites. Chest x-ray was taken from all workers and read by two experts familiar with pneumoconiosis classification according to 1980 ILO guidelines. Those with findings compatible with asbestosis were further ckecked with high resolution computerized tomography (HRCT). Pulmonary function tests were done according to ATS guidelines, and occupational and previous medical history was taken through a standardized interview. Air-borne asbestos was measured according to NIOSH method 7400. The air-borne asbestos concentrations ranged from 0.2-1.3 f/cc for asbestos textile, from 0.7-1.0 f/cc for brake lining, and from 6.3-7.8 f/cc during asbestos removal at ship repairing worksite. Of the 139 workers 25 had abnormal chest radiographic findings, and 10 of them had findings compatible with pneumoconiosis. When work history and current asbestos measurements were accounted, 9 workers who had more than 10 years of asbestos exposure history showed chest radiographic findings of pneumoconiosis with Finally, 4 workers showed finding of pulmonary fibrosis and/or pleural thickening at HRCT, and 2 of them had restrictive lung function changes. The study results showed that, among 139 subjects, there were 4(3%) definite asbestosis cases confirmed with HRCT. The prevalence of probable asbestosis was 7% for 10-14 years of exposure, 13% for 15-19 years of exposure, and 23% for 20 or more years of exposure. The prevalence of compensable asbestosis with abnormal lung function was 4-6% for those with 15 or more years of exposure.

PS콘크리트 거더의 Camber에 관한 연구

최정호,김남근 한경대학교 2003 論文集 Vol.35 No.-

In this study a numerical procedure and computer program are developed to analyze the behaviors of PS concrete girder considering the time-dependent properties. It acounts for creep, shrinkage of concrete and relaxation of prestressing steel. The structural model uses two dimensional plane frame elements with three nodal degrees of freedom and analyzed based on the displacement method. Member cross section can consist of concrete, reinforcement and prestressing steel. Two different sets of equations to predict the time-dependent material properties of concrete are presented, which are ACI and CEB-FIP. Analytical studies for different examples of PS concrete specimens and girder have been performed to demonstrated the capabilities and practical applicabilities of the developed program. The proposed analysis procedure can be used in accurate prediction of time-dependent behaviors of PS concrete structures, especially for segmentally constructed.

로드셀을 이용한 직물의 신축성 측정에 관한 연구

최정수,김은석,주기세,왕지남 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(1)

So far, the common elasticity data of textile fabrics has not been present because the method depends on the knowledge of measurement operators. In this paper, the new measurement equipment using road cell is presented to measure the coefficient of textile fabrics in real time. The measurement method is based on the volt: among textile fabrics. The textiles with strong elasticity are high voltage produced from others are low. The presented method can be applied to visualize the textile, sew the cloth, contrc textile fabrics. Also, these measurement datum are used to B2B electronic trading system.

Ti 鎔接材의 機械的 特性 및 殘留應力의 分布에 關한 硏究

최병기,장경천,국중민,정장만,구남열 한국산업안전학회 2003 한국안전학회지 Vol.18 No.1

The objective of this paper was to investigate the welding characteristics according to the restraint condition, the pass number, and the shield gas quantity with titanium commonly using in power stations, aircrafts, ships, and so forth. The residual stress distribution was measured under restraint and nonrestraint welding conditions. The tensile strength and elongation of the 4 pass welded specimen were shown higher about 10% and 30% than those of the 7 pass welded specimen at the same welding conditions respectably. Also, the more shield gas quantity and the shorter natural cooling time, the higher tensile strength and the lower elongation.

중학교 남자 테니스 선수의 운동기능수준별 시합 전 경쟁상태불안

남인수,최인태,전중기,윤재만,고성경,이종삼,임승현 대구대학교 인문과학연구소 2008 人文科學硏究 Vol.31 No.-

The purpose of this study was to investigate if there is any difference in the level of competitive state anxiety according to the level of motor skill before the game and to provide the players with basic data for the mental practice. The subjects of this study consist of 20 men's a middle school tennis players. The experimental group was divided into superior players group and inferior players group. And then by using a CSAI-2 questionnaire, three subfactors of competitive state anxiety, or cognitive state anxiety, somatic state anxiety and state self-confidence were measured. The method of measurement was carried out three times, or one week, one day and two hours before the game. The results of this study were as follows. First, About both cognitive state anxiety and somatic state anxiety, inferior players were significantly higher than superior players. Second, About state self-confidence, superior players were significantly higher than inferior players. Third, As the game was around, both cognitive state anxiety and somatic state anxiety which all the players including superior and inferior players had increased. But the state self-confidence of all players decreased.

응급실 방문 정신과 환자의 지역특성에 따른 질병행동 비교 : 서울과 구리의 경우

최주연,정운섭,박용천,남정현 漢陽大學校 精神健康硏究 1999 精神健康硏究 Vol.18 No.-

한약수치에 관한 연구(제 9보) : 炒甘草 제법의 표준화 및 규격화(1) Preparing Standardization and Regulation of Stir-Frying Glycyrrhzia root(1)

최혁재,이우정,박성환,송보완,김동현,김남재 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

In this study, We carried out the preparing standardization and regulation of processed Glycyrrhizae Radix(PGR) which have been widely used in oriental medicines. Glycyrrhizae Radix(GR) have been generally prepared by the stir-frying, or mix-frying with honey for purpose of decreasing sweetness and augmenting vitality. Firstly, we tried to standardize PGR prepared by the stir-frying. We purchased 14 kinds of PGR and non-processed GR(NPGR) at oriental physician's offices and oriental pharmacies on a nation scale, respectively. The amounts of dry on loss, water extract, diluted ethanol extract, ether extract, total ash, acid insoluble ash, glycyrrhizin(GL), glycyrrhetic acid(GA) and liquiritin(LQ) of them were examined. The amounts of dray on loss, GL and LQ in commercial PGRs showed remarkable decrease, while GA showed increase as compared with NPGR. In order to standardize preparing method of PGR, the effect of heating time on physico-chemical parameters and biological activities were examined. Physico-chemical parameters such as dry on loss, extract amount, GL and LQ contents in PGRs showed decrease, however, GA was increased with heating time as compared with NPGR. Also, GA obtained form heat-treated GR, was found as an artifact in PGRs. PGR was more effective than NPGR in vitro test of DPPH scavenging effect and TBA-Rs reducing effect. PGR and NPGR showed potent hepatoprotective effect on CCl_(1)-intoxicated rats. Especially, PGR prepared by 80 min of heating was the most effective. Considering these results, the optimal condition for PGR preparation was 150℃ for 80min.

만성두통환자에 대한 동서협진의 임상적 연구

정인태,이상훈,김수영,차남현,김건식,이두익,이재동,임사비나,이윤호,최도영 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objective : Because the cause and etiology of chronic headache are not yet fully explained, the treatment of this symptom is not simple. In order to study the effectiveness East-West pain treatment on chronic headache, we evaluated its effect of pain alleviation and quality of life improvement on chronic headache patients who were treated with nerve block and acupuncture, and only acupuncture for eight weeks. Methods : 92 clinical experiment participants were gathered and through a questionnaire patients who experienced headache for more than 4 hours a day and more than 15 days per month were qualified as chronic headache patients. The qualified patients were classified into two groups, nerve block and acupuncture group(EW group, n=49) and acupuncture group(E group, n=43). Treatment was applied 2 times a weeks for 8 weeks. The acupoints, GV20, HN23, ST8, HN46, TE17, GB20, LI20, LI11, LI14, ST36, and LR3 were stimulated for 20 minutes. The effects of two groups were analyzed using VAS scores and BPI(Brief Pain Inventory). Results : The VAS and BPI after four weeks of treatment showed significant improvement among two but differences between the three groups was statistically insignificant. The VAS and BPI of the EW group after eight weeks of treatment showed statistically significant improvement compared to the other two groups. Conclusion : The pain treatment for chronic headache might be contributed to improvement of quality of life as well as alleviation of pain of chronic headache patients. It was suggested that the West pain treatment in combination with East pain treatment might be an useful modality to improve the pain and quality of life in chronic headache patients.

만성두통환자에 대한 침치료가 심박변이도에 미치는 영향

정인태,이상훈,김수영,차남현,김건식,이두익,이재동,임사비나,이윤호,최도영 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objective : The purpose of this study was to assess the effect of acupuncture treatment for chronic headache patients using power spectrum analysis of the heart rate variability(HRV). Methods : 15 clinical experiment participants were gathered and through a questionnaire patients who experienced headache for more than 4 hours a day and more than 15 days per month were qualified as Chronic Headache patients. Treatment was applied 2 times a weeks for 8 weeks. The acupoints, GV20, HN23, ST8, HN46, TE17, GB20, LI20, LI11, LI14, ST36, and LR3 were stimulated for 20 minutes. The effects of acupuncture treatment were analyzed using power spectrum analysis of the HRV, HRV was recorded before and after acupuncture treatment. Results : HRV before and after treatment was compared after 8 weeks of acupuncture treatment. Increase in mean values of SDNN and RMSSD were observed but the increases were not statistically significants. Increase in mean values of TP, LF and HF were observed but, the increase was significant(p<0.05) only in TP. Conclusions : The results suggest that acupuncture treatment on chronic headache patients can increase the activity of autonomic nervous system. Further use of HRV for quantitative analysis of acupuncture treatment on autonomic nervous system related symptoms is suggested.

트래드밀 운동프로그램 적용이 성인비만자의 심폐기능과 혈청지질에 미치는 영향

최건식,정영자,김남익,황수관 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.2

The purpose of this study was to investigate the effect of treadmill exercise programs on cardiopulmonary functions and serum lipids in adult obesity men. The subjects consisted of 33 obese adults between 30 and 70 years old and all of them had no other complications. Subjects participated in treadmill exercise programs for 12 weeks according to the exercise prescriptions. They started to exercise for 20 minutes per day, six times a week at 50% of maximum O_2 consumption (V˙O_2max), and later exercised for 50 minutes at 80% of V˙O_2max, which was the maximum exercise intensity of the program (Exercise intensity has been increased gradually). The changes of body composition, serum lipids, and cardiopulmonary functions in the subjects before and after the treadmill exercise program have been measured. The results are as follows. 1. Body weight, percent body fat, and fat body weight were reduced(p<0.05, p<0.01), and body fluid were increased after exercise programs(p<0.01). The group below 50 years old and above 25% of body fat showed more decrease in body weight and percent body fat, and more increase than that above 50 years old below 25% of body fat. 2. Resting heart rate, systolic and diastolic blood pressure were significantly reduced after exercise programs(p<0.05, p<0.01), but these parameters decreased approximately same for the groups of ages and percent body fat. 3. Vital capacity, forced expiratory volume for 1 second percent and maximal voluntary ventilation were increased after exercise programs. The group below 50 years old and above 25% of body fat showed more increase than that above 50 years old and below 25% of body fat. 4. Total cholesterol, LDL cholesterol, total cholesterol/HDL cholesterol rate and triglycerides were reduced (p<.05, p<0.01), and HDL cholesterol levles were increased after exercise programs. The group below 50 years old and above 25% of body fat showed more decrease in total cholesterol, LDL cholesterol, total cholesterol/HDL cholesterol rate and triglycerides, and more increase than that above 50 years old and below 25% of body fat. 5. Heart rate increase during exercise were reduced after exercise programs. The group below 50 years old and above 25% of body fat showed more decrease than that above 50 years old and below 25% of body fat. 6. Blood pressure increase during exercise were reduced after exercise programs. The group above 25% of body fat showed more decrease than that below 25% of body fat. 7. Oxygen uptake of during exercise were increased after exercise programs. 8. Maximal oxygen uptake were significantly increased after exercise programs (p<0.01). 9. The regression equations between heart rate, systolic blood pressure, and oxygen uptake were obtained. These correlation coefficients of the post-programs showed higher that those of pre-programs. In this study, the treadmill exercise programs suitable for the obese was developed and applying this programs weight, percent of body fat, body fat weight, and serum lipids levels ere reduced. Thus cardiopulmonary functions was improved. The group below 50 years old and above 25% of body fat showed more decrease than that above 50 years old and below 25% of body fat. It is to be noted that both systolic blood pressure and oxygen uptake can be estimated by heart rate only using the regression equations.