우리나라 치과기공사의 증가현황 및 협회원의 지역별 분포현황 연구

권순석 대한치과기공학회 2004 대한치과기공학회지 Vol.26 No.1

The present study reviews the license registration status of dental technicians and dentists from1970 to 2002, the number of technician members of The Korea Dental Technician Association from1990 to 2003, and the number of dentist members in 2003. It also considers the yearly membershipfluctuations, its growth rates, yearly increase/decrease, the rate of dentist to dental technician,regional distribution of association members, regional yearly increase/decrease of the members,and the regional distribution of dentists and dental technicians. The purpose is to identify andpredict the problems in the demand/supply of dental technicians and the regional imbalance ofmanpower distribution. By doing so, this study attempts to propose the appropriate standard for thesupply of dental technicians and point out the necessity of making mid- or long-term plans forensuring the efficiency of manpower supply and balanced regional distribution. The result is asfollows:1. The number of dental technicians and dentists in 2002 has grown 36.79 and 9.27 times from1970, and 2.20 and 2.05 times from 1990, respectively. It tool 11 years for the twofold increase ofdental technicians from 1990, one year faster than the same increase of dentists.The number of dental technicians per a dentist was the lowest in 1972 (0.21 person), and the highest in 2002 (0.86 person). Specifically, the fastest growth was observed for a year from 1983(0.47 technician per a dentist) to 1984 (0.6). From 1984 to 1986, the ratio grew by 0.1 every year. Summing up the numbers of dentists and dental technicians who passed the national certificationexamination, this study predicted the number of dental technicians per a dentist to be 0.88 in 2003,and 0.90 in 2004. 2. From 1990 to 2003, the average distribution of dental technician was 71.76% in themetropolitan areas and 28.24% in other smaller regions.The proportion of dental technicians working in the three major cities (Seoul, Busan, and Daegu)was the lowest in 2001 (52.39%) and the highest in 1996 (62.66%). The majority number of dentaltechnicians who practiced in the metropolitan areas (about 70% of the entire population) were inservice in the three major cities. 3. Compared with 1990, the number of dental technicians in 2003 grew 2.28 times in the largecities, and 2.05 times in other smaller regions. The yearly growth rate was the highest in 1994 overthe previous year: 26.06% in large cities and 17.86% in the other regions.In the large metropolitan cities, the growth rate was the highest in Incheon (5.8 times for 5 yearsfrom 1998 to 2003), In the rest of the regions, the increase of dental technicians was the highest inGyeonggi (6.5 times from 1990 to 2003).4. In 2003, as much as 73.40% of all the members of the Korea Dental Technician Associationwere distributed in the large metropolitan cities, and the rest 26.60% were in other smaller regions.Meanwhile, 54.35% of the dentists practiced in the metropolitan cities, and the rest 45.65% were inservice at other regions. This result indicates that more dental technicians than dentists areconcentrated in large cities.More than half of all the technician members of the Association are distributed in the three majorcities (i.e. Seoul, Busan, Daegu). On the other hand, 42.03% of dentist members are in these threecities and 53.97% of them practice in Seoul, Gyeonggi, and Busan.In 2003, the ratio of dentist to dental technician is 1:0.43 in general, while the ratio is 1:0.58 inthe metropolitan cities, and 1:0.43 in other regions. In 2003, 33.30% of all the certified dental technicians are the member of the Korea DentalTechnician Association, while 66.82% of all the licensed dentists are its members.

수직하향핀이 부착된 수평 평판에서의 자연대류 열전달에 관한 해석적 연구

권순석,권용일,양성환 동아대학교 공과대학 부설 한국자원개발연구소 1989 硏究報告 Vol.13 No.2

This study has been carried out to investigate into the natural convection heat transfer from the isothermal horizontal plate with downward projecting fins numerically. The governing equations for the system are solved by the finite difference method and sucessive under relaxation method at Ra=10^(5), Pr=0.71, C_(F)=7.75. Mean Nusselt numbers, velocities, temperatures and stream functions are obtained for various dimensionless fin lengths. The results are as follows ; 1. The dimensionless temperature distributions decrease rapidly in fins and linearly in fluid as x/s increase 2. The mean plate, fin and total Nusselt number are decreased by increasing the dimensionless fin lengths 3. The mean late Nusselt number is less than the mean fin Nusselt number at l/s>8.0 4. The local fin Nusselt number is increased rapidly near the fin tip and that of the fin tip is decreased rapidly by increasing the dimensionless fin lengths.

일 대학 치기공과 재학생의 성격유형과 전공 및 직업만족도, 희망직무와의 관계

권순석 대한치과기공학회 2016 대한치과기공학회지 Vol.39 No.2

Purpose: This study aims to offer fundamental data to develop a career program that helps the dental technology students find a proper and desired job position and to be satisfied with their job. To this goal, we analysed the differences found between the personality type, major satisfaction, job satisfaction, and preference in job position among the dental technology students. Method: We conducted a survey using Myers-Briggs Type Indicator among the subjects who are sophomores and juniors of the dental technology department of a university in Gangwon province. Our analysis was grounded on 130 valid questionnaires. Results: The results are summarized as follows: In personality type ESTJ turned out the highest as 20.0%, while ENTP was the lowest as 0.8%. The preference was revealed as Extraversion (66.9%), Sensing (74.6%), Feeling (50.8%), Judging (61.5%) respectively. Of the general characteristics, only the religious or non-religious state was statistically meaningful as (p<. 05) in emotional type (F). No statistical significance was found in the major satisfaction. The job satisfaction was statistically meaningful as p<. 05 in Judgemental type (J). GPA was statistically significant as p<. 05 in the sensory type of the personality type. Desired job position was statistically meaningful as p<. 05 in emotional and cognitive types. Conclusion: We found a meaningful difference in the job satisfaction and the desired job position with respect to the personality type of dental technology students. However clear explanation of the correlations among these factors requires a more comprehensive survey and various approaches from the personality and psychology tests, which is to follow.

치과기공사의 건강습관과 삶의 질과의 연관성

권순석,김윤신 한국치위생과학회 2010 치위생과학회지 Vol.10 No.3

This paper aims to provide resources and data that enable us to develop health care programs for the dental technicians by way of conducting the questionnaire survey and the analysis of the habitual characteristics influencing their quality of life. Except for the missed and the unqualified questionnaires, 1525 sheets were collected and analyzed with multiple regression analysis and analysis of variance. The results of the analysis are as follows; 1. In the quality of life(SF-36), the physical factors(PCS, 72.01) marked higher than the mental factors(MCS, 63.76). Of the 8 sub items, the physical function(PF, 85.54) turned out the highest and the vitality(VT, 52.32) the lowest. 2. It was the working conditions among the general characteristics that most affect the sub items of the quality of life, and the physical and mental factors. In the health habits, the regular physical activity and the hours of sleep were the most affecting one, which was supported by the statistical significance(p<.001). 3. In the overall quality of life, the mental factors(β=.759) were more affecting than the physical factors(β=.531). Among the sub items of the physical factors, the physical function(PF)turned out the most influencing one while the mental health(MH) proved the most affecting factor among the sub items of the mental components.

청녹색 발광 분산형 전계 발광 소자의 전기적 및 광학적 특성에 미치는 주파수 효과

권순석,유장열,한상완 대한전자공학회 1999 전자공학회논문지T Vol.t36 No.3

The preparation and electrical or optical characteristics of blue-green emitting powder type electroluminescent device(P-ELD) are described. In V-I and Y-L characteristics, current and luminance are increased with increasing frequency and voltage. Luminance was shown 840 cd/$\textrm{m}^2$ at operating condition of 20 kHz, 150 V It can be explained by eqivalent circuit of P-ELD.

국내 간암의 역학

권순석 대한의사협회 2019 대한의사협회지 Vol.62 No.8

The incidence rate of primary liver cancer in Korea, the majority of which is hepatocellular carcinoma, has been decreasing steadily since 1999. However, Korea still has one of the highest incidence rates of liver cancer worldwide. Currently, liver cancer is the fifth most common cancer type in men and sixth in women. A total of 15,771 cases (11,774 men and 3,997 women) were identified, with an age-standardized incidence rate of 18.0 persons per 100,000 (29.2 in men and 7.9 in women) in 2016. Mortality from liver cancer has also decreased since 2002 in both sexes, although it is still the second most common cause of cancer deaths with 10,721 deaths (7,982 in men and 2,739 in women) in 2017. The 5-year relative survival rate was 13.2% in those diagnosed in 1996-2000, and it increased to 34.3% in those diagnosed in 2012-2016. Hepatitis B (HBV) and C (HCV) viruses are the most important causes of liver cancer, accounting for approximately 70% and 10% of liver cancer cases, respectively. Recently, the seroprevalence of HBV has markedly decreased to less than 3%, and the HCV antibody positivity rate has been estimated as about 0.7% in a nationwide survey. The participation rate of patients with hepatitis in liver cancer screening, a part of the National Cancer Screening Program, was still low at about 60% in 2018. Recent advances in the treatment of HBV and HCV could further reduce the burden of liver cancer despite its limited accessibility.

垂直上向핀이 附着된 水平平板에서의 自然對流 熱傳達

權純錫,金善政,全永煜 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.2

This study on the natural convection has been conducted experimentally for the heat transfer characteristics of the horizontal flat plate with three aluminium fins in air according to the various heights of fin and the various Rayleigh numbers. The experimental results are as follows; 1. The mean fin, mean plate and total Nusselt number are increased by increasing dimensionless fin height. 2. The mean fin, mean plate and total Nusselt number are increased by increasing Rayleigh number. 3. The mean fin Nusselt number is the highest at the outside surface where there is no interference from each other. 4. The mean plate Nusselt number at H/S =0.67 and 1.67 for Ra_(s) =7.31×10³ are 53% and 52% less than the mean fin Nusselt number owing to the interference of fins. 5. The distribution of mean total Nusselt number shows similar tendency as compared with the experimental results of Jones and Smith (2).

원판증발기를 가진 회전형 히트파이프에서 액막두께가 전열에 미치는 영향

권순석,장영석,유병욱 대한기계학회 1994 대한기계학회논문집 Vol.18 No.6

Heat transfer characteristics in a rotating heat pipe with evaporator of the rotating disc and the condenser of the screwed groove is investigated by numerical method for various dimensionless film thicknesses, Re, C_{p}{\Delta}T/h_{fg}$, rotational speed and working fluids. The temperature difference between evaporator wall and vapor increases a little, but the temperature difference between condenser wall and vapor decreases rapidly as Re increases. As the dimensionless film thickness decreases, the temperature difference of evaporator and condenser decreases. As the rotational speed increases, the temperature difference between evaporator wall and vapor increases but the temperature difference between condenser wall and vapor decreases. The Nusselt number can be shown as a function of dimensionless film thickness and Re, that is $Nu=0.963\cdot(\delta^{-1}(\omega/\vpsilon)^{-1/2}{\cdot}Re^{0.5025})$.

銅板핀이 附着된 水平圓筒에서의 自然對流 熱傳達

權純錫,金善政,洪南湖 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.1

This study on the natural convection has been studied experimentally for the heat transfer characteristics of the horizontal cylinder with one copper fin in air according to the various lengths of fin and the various Rayleigh numbers. The experimental results are as follows; 1. When Rayleigh number is constant, local Nusselt number from the cylinder surface is decreased by increasing fin length. 2. When Rayleigh number is constant, mean fin Nusselt number has the highest value at ℓ=0.2 and the increasing value at ℓ<0.2 and the decreasing value at ℓ≥ 0.2 as the fin length increases. 3. Local fin Nusselt number is increased apparently near the base and rapidly near the tip, and the value near the tip is decreased as dimensionless fin length increases. 4. When fin length is constant, mean fin, mean cylinder and mean total Nusselt number are increased by increasing Rayleigh number.

일부 치과기공사의 여가만족도 및 관련요인에 대한 연구

권순석,김윤신 대한치과기공학회 2008 대한치과기공학회지 Vol.30 No.2

This study explored the status of free time activities among the dental technicians who are working at Seoul, Gyonggido, and Gangwondo. On the basis of this research, we aim to present needs and applicable solutions to improve the working conditions and enhance the quality of life through more effective time management in free time activities that lead to their self development and far more enriched life. 500 subjects were randomly chosen and the questionary sheets were provided. Among them, 305 sheets were returned to be analysed through SPSS Win 10.0 software and the results are as follows; First, mean in the satisfaction of leisure activities was 3.44(SD=.73). Mean in sub categories was as follows; psychological factor(M=3.65, SD=.71), social factor(M=3.54, SD=.75), rest factors(M=3.52, SD=.63), physical factor(M=3.43, SD=.88), other factors(M=3.40, SD=.66), circumstantial factor(M=3.33, SD=.63), educational factor(M=3.24, SD=.73). Second, the most relevant sub categories in the satisfaction of leisure activities were social, educational, physical, and other circumstantial factors by sequence. Factors that affect leisure activities satisfaction were career and status of health, which shows statistical significance(p<.001). That is to say, contention of this study is that the general characteristics are closely related with and affect the types and the level of satisfaction in leisure activities of the subjects. Considering these results, the dental businesses and the associations of dental technicians should recognize the needs to improve the time management through more efficient cooperations between dentists and back office dental team, systemized working time, and introduction of incentive system among others. On the basis of this appreciation, the dental business should provide more time and various opportunities with the dental technicians. Dental technicians also need to reconsider their appreciations of leisure activities, that is, leisure activities are not just spending time doing something but they refresh them and enable them to be more active and faithful to home and work.