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새로운 연노출의 효과지표로서의 혈장 δ-aminolevulinic acid 측정의 유용성
이금원,황보영,김용배,리갑수,이성수,장봉기,함정오,안규동,이병국 순천향대학교 산업의학연구소 2001 순천향산업의학 Vol.7 No.1
To evaluate the usefulness of the measurement of plasma δ - aminolevulinic acid (ALAP) as a new effect indicator of lead exposure, the association of ALAP with blood lead, DMSA chelatable lead and bone lead with a special emphasis of genetic interaction of ALAD polymorphism was studied with 419 lead exposed workers and 85 non-lead exposed workers. Lead workers were recruited from storage battery industries, secondary smelting industries and other lead using industries and non-lead workers selected from electronic refrigerator manufacturing industry. Blood lead, DMSA chelatable lead and bone lead were chosen for parameters of lead exposure. Plasma and urinary ALA were selected for the effect parameter of lead intoxication. Information for age, smoking, drinking habit and body mass index were also obtained. Job duration for lead workers was also collected. The overall prevalence of the variant allele, ALAD type 1-2 or 2-2(ALAD2) in lead exposed workers was 10.0% (42 out of 419 lead workers) which was not differed from control workers (9.4% : 8 out of 85). The means blood lead and DMSA chelatable lead of lead workers with ALAD 1(ALAD type 1-1) were lower than those of lead workers with ALAD2, but the differences were not statistically significant. On the other hand, the mean of tibia lead of lead workers with ALADI was higher than that of lead workers with ALAD2, but the difference was not statistically significant. DMSA chelatable lead showed highest correlation with log transformed plasma ALA(LALAP)(r=0.682) and blood lead and tibia lead had r=0.650, r=0,402 correlation coefficient with LALAP respectively On the other hand. log transformed urinary ALA(LALAU) had lower correlation coefficient with all three parameters of lead exposure than LALAP. The equation of robustic simple linear regression of blood lead on LALAP was LALAP=2.0439+0.0165PbB in ALADI lead workers and LALAP=2.031+0.0121PbB in ALAD2 lead workers. ALAD genotype in the multiple regression analysis of blood lead with LALAP after adjusting for possible confounders(sex, ago, BMI, smoking and drinking status and job duration) showed significant main effect on LALAP resulting lower LALAP in ALAD2 lead workers than ALADI lead workers. On the other hand, effect modification of ALAD genotype was observed in the multiple regression analysis of tibia lead with LALAP after adjusting for possible confounders, but there was no significant effect of ALAD genotype in the multiple regression analysis of DMSA chelatable lead with LALAP after covariate adjustment. With above results, plasma ALA was found to be a useful effect parameter of lead exposure compared with urinary ALA. It was also observed that ALAD polymorphism made significant effect on the association of blood and tibia lead with ALAP. Thc lower plasma ALA in ALAD2 lead workers suggested supportive effect of ALAD2 in lead exposure.
플레이트를 이용한 냉간성형 각형강관 T형 접합부에 관한 실험적 연구
석희원,박금성,정상민,조성식,배규웅,문태섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
The purpose of this paper is to investigate experimentally the strength and deformation of T-joints to evaluate the structural behavior of truss connection consisted in square hollow steel section with plate. There are the branch plate type in T-joint shapes. Principal parameters are the ratio of the chord width to thickness(2ν=31.3, 22.2, 16.7) and the ratio of branch plate thickness to chord width(βp=0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.75, 0.85). The most important result obtained from this experiment is as follows; The ultimate strength of T-joints increase proportionally as the 2ν ratio decrease, and the βp ratio increase. The others, experimental results are summarized for ultimate strength to displacement, initial stiffness and failure mode of each T-joints.
인터넷 의류쇼핑몰의 소비자 정보탐색량과 구매 후 지각된 제품성과 및 만족도 연구
홍금희,김지원 신라대학교 사회과학연구소 2004 사회과학연구 Vol.- No.7
This study attempts to understand how consumers' risk perception, internet shopping interest and clothing involvement have an effect on information search, and to examine how these variables affect the perceived clothing product performance and internet clothing shopping satisfaction. An on-line survey was made to collect data, and the replies from 758 people, who had an experience of apparel shopping on line, were used in the analyses. The research results are as follows: 1. The consumers' risk perception had been divided into three factors: product-related risk, internet-related risk, and finance-related risk. 2. Consumers had visited internet shopping malls about 3.4 places to shop clothing. They spent about 15-30 minutes at the malls. 3. Internet shopping interest only influenced the information search. 4. The risk perception and the clothing involvement influenced the perceived clothing product performance directly. 5. The internet shopping interest, the perceived clothing product performance, and clothing satisfaction had an effect on the internet clothing shopping satisfaction.
수수실의 간호조직특성, 조직문화 유형 및 팀 효과성과의 관계
김금옥,김분한,김윤숙,전혜원 대한간호학회 간호행정학회 2006 간호행정학회지 Vol.12 No.3
Purpose: This study was a literary investigation in the development of an effective team-raised and cultural nursing organization targeting operating room nurses. This was done by grasping organizational features, different types of nursing organizational culture and team effectiveness, and by analyzing the relationships among variables. Method: The participators were 373 nurses. The data was collected between March 10th and April 28th, 2004. SPSS Win 11.0 program was used for data analysis. Results: Results of this study were as follows: A nursing organization at operating rooms was found to have an organizational culture with the characteristic of a centralized power and hierarchy-oriented organizational culture. With respect to a relationship between operating room organizational characteristics and the types of nursing organizational culture, there was a significant correlation in relationship-oriented culture and innovation-oriented culture. In the relation between the types of operating room organizational culture and team-effectiveness, it showed a significant correlation in team-devotion, Peer-group-satisfactional perception of a team's outcome in decreasing order. Conclusion: The organizational characteristic at operating rooms was power centralization and the culture type was hierarchy-oriented. These are factors that have a negative effect on a team-effectiveness-affecting relationship-oriented culture, innovation-oriented culture and work-oriented culture.
李金源,崔南洙 관동대학교 1996 關大論文集 Vol.24 No.1
In this paper, self-tuning controller is designed, so that Hoo norm of the difference between the desired transfer function and the actual closed loop transfer function is minimized. For solving this problem. Nevanlinna-Pick interpolation method is introduced and 1-step ahead predictor is also utilized for the realizable controller design. A 2nd order system is used for simulation. The effect of the noise to the system output is shown to the rejected in simulation.
李金源 관동대학교 1997 關大論文集 Vol.25 No.2
For system identification, existing LMS type estimators are widely used. For example Kalman filter is one of them. But since 1980s H cencepts are studied theoretically and recently H estimators are tried by several reserchers. In this paper, a state estimator is derived for the H∞ norm of the estimation error spectrum matrix to be minimized. For the solution of this problem, duality between this problem and the well-known H control problem is derived. So the standard H control problem solution method can be used for the estimation problem solution. The computer simulation results show that H estimator has less estimation error and so this is better than the existing Kalman filter estimator.
여성 연폭로 근로자들의 연폭로 지표와 자각증상에 관한 연구
이금원,임정규,안규동,이병국 순천향대학교 1994 논문집 Vol.17 No.2
The effect of lead on subjective symptoms of lead exposure was studied with 396 women lead workers in 6 storage battery factories as an exposed group to lead and 166 women workers in general manufacturing industries as a non-exposed group to lead. Zinc protoporphyrin in whole blood(ZPP) was selected as an indicator of lead exposure. SGOT and SGPT were also checked to observe the lead effect on liver function of lead workers. Questionnaires of 15 lead related symptoms were provided to all women workers and filled up by themselves and reconfirmed the symptoms answers by interviewing medical doctor. There was significant mean difference of blood ZPP between exposed group (90.0 ± 86.2 ug/dl) and non-exposed group (33.8 ± 29.9 ug/dl), but there was no differences of means of SGOT and SGPT between exposed and non-exposed group to lead. After age stratification, the symptom prevalences of exposed group were higher than non-exposed group in most cases. This trend was strong in the comparison of symptom prevalence of women worekrs whose ages were under 30 years. The symptom prevalence of women workers who worked in medium sized factories was higher than that of women workers working in small sized factories. While the symptom prevalence of all workers was not dose-dependent to ZPP increase in most symptoms category, there was weak trend of dose-respnse relationship of symptom prevalence with ZPP increase in women workers working in medium sized factories, but not statistically significant.
이금원 關東大學校 産業技術開發硏究所 2008 산업기술논문집 Vol.- No.25
The stabilized ambulation design of a biped robot which have 18 degrees of freedom is researched By using inverse kinematics, the angles of motors of each joint are calculated as D-H transformation parameters It is shown that the center of gravity of the robot is stabilized with the added upper body and the robot can accomplish stabilized ambulation in the experiments which is done by using the derived numerical formulas and algorithms.
오금향,정낙원,이효지 漢陽大學校 韓國生活科學硏究所 1994 韓國 生活 科學 硏究 Vol.- No.12
The diet has held weight in the basic life of the mankind. Its contents, closely connected with the state of health, play an important role in the physical and mental happiness in life. Especially, the youth at the age of 13 to 19, who show the rapid growth physically, mentally, and psychologically, must acquire nutrition knowledge and form the right diet habits. This research shows how these knowlege and diet habit have an effect on student's health. The following results, gained by means of SPSS/pc+, were analyzed in terms of frequency, percentage, dispersion analysis, X2- test, and pearson's correlation. The results are as follows : 1.The group was made up of the humanity group of 37.2% and the natural group of 34.3% and the vocational group of 28.5%, 48.1% of the subjects for research was at the age of 16. The distribution of their scholastic marks were 26.9% in the upper level 30.2% in the middle level. and 191.% the lower level. 2.In the parents' school carrer of the object students, persons who graduated high school were numerous. The mothers' educational level was than that of the fathers. In the parents' job, fathers engaged in office were 24.0% most of the students' mothers were home makers (53.6%), and mothers engaged in official work were 13.7%. 3.The students took up 61% who answered that knew about nutrition to some degree. Most students responded that they got knowledge and information about nutrition(83.2%). The source which students acquired nutrition knowledge from were schools (48.7%) and mass communication(30%). 4.The frequency of meals in a day, was usually three times. The meal that students were likely to have was breakfast, lunch, and dinner in its order. In most cases, The students skip meals three or four times a week. The meal that students enjoyed was lunch, which was taken regularly where as they had breakfast and dinner irregularly. The reason was that they had no time to eat. After dinner, the students sometimes ate refreshments(64.3%) and it took them tenor twenty minutes to have it. They tended to talk with each other while eating. The students thought that the trouble they're having was manintaining the regular diet habit. 5.The students were in good health, and 74.3% of them had never suffered from any illness, In terms of the physical fidelity its distribution was composed of 「da」 of 48.0% and 「ra」 of. It means that the students are in a normal condition of growth. and 22.4% of the took a variety of medicines for improving their health sight and for treating anemia. 6.There was a meaningful difference between nutrition knowledge of the students and their physical health(P<0.05). The students who knew much about nutrition were physically healthy, and mental health was closely connected with physical health(P<0.01). The students who had a good knowledge of nutrition and a good physical health got good school records.
윤제원(Je-Won Yoon),김영찬(Young-Chan Kim),김금모(Keum-Mo Kim),장강석(Kang-Seok Jang),구본성(Bon-Sung Ku),엄주용(Joo-Yong Eom) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
The purpose of this study is to develop an air-passing soundproofing panel with more improved structure to reduce the CO2 emission and installation cost. To reduce the emission of CO2 ; it is suggested to choose low CO2 emission material relative to the aluminum and to reduce the materials by developing a specially designed air-passing soundproofing panel structure. First of all, we performed the flow analysis to predict the wind pressure according to the open angle of the air-passing soundproofing panel and the noise level analysis at the receiver point. To verify the simulation, a prototype of the soundproofing panel was made. The flow test in the wind tunnel and load test were performed. The economic evaluation for the installation of the air-passing soundproofing panel was performed and specifications of the installation was prepared. As the results of this research, it was verified that the wind load was reduced about 40% to that of the conventional one at 25m/s wind speed in the wind tunnel test. By applying the 4m span soundproofing wall with air-passing soundproofing panel and under the cost of 250 thousand won/m2 instead of the conventional 2m span panel, the installation cost will always be lowered than the conventional one in the combination of (60:40~50:50) conventional to air-passing soundproofing panel from the economic evaluation. The 20% reduction of CO2 was found by changing the 50% of aluminum soundproof panel to air-passing soundproofing panel.