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금속 산화물 지지체를 이용한 산소환원반응에 대한 전기화학 촉매 연구 동향
조유진,정원석,임보명 대한금속·재료학회 2023 대한금속·재료학회지 Vol.61 No.4
Global warming and air pollution have forced greater attention to new energy sources to replacefossil fuels. Among several eco-friendly energy sources, polymer electrolyte membrane fuel cells have beenincreasingly investigated since they have zero emissions, high energy density, and high energy efficiency. Carbon-supported Pt catalyst is generally used for the cathodic catalyst in polymer electrolyte membrane fuelcells. However, Pt/C catalysts corrode under start-up/shut-down conditions. Pt agglomeration, separation, andloss can occur due to the carbon corrosion, which results in a rapid performance loss. Metal oxide is apromising candidate as an alternative support since it shows high stability in the high potential. Of severalmetal oxides, titanium oxides and tin oxides have been widely investigated. Their performance is comparableto the Pt/C catalyst, and they have shown even higher durability than the Pt/C catalyst in accelerated stresstests simulating start-up/shut-down conditions. In this paper, we summarize the development of metal oxidesupports for the Pt catalyst in the five most recent years. In recent studies, the characteristics of metal oxideshave been varied using new synthesis methods, annealing temperature, precursors, and dopants, whichresults in enhanced ORR activity and durability. Advanced metal oxides have shown high durability andexhibited acceptable performance compared to the state-of-the-art Pt/C catalysts.
중소기업 학습조직 활성화가 생산성에 미치는 영향에 관한 연구
조유진,강경식 대한안전경영과학회 2017 대한안전경영과학회지 Vol.19 No.4
In knowledge information society entering global unlimited competition era, our middle and small sized companies are the base of national and enterprise competitiveness and core base of national economy as an origin of jobs. The competitiveness of middle and small sized companies is so important to decide the level of the competitiveness of the whole industries, but the gap from big sized company is much low in comparison with advanced countries from angles of important factors of enterprise growth, productivity and technological competitiveness, so, it's urgent to improve the competitiveness through productivity enhancement. The purpose of this research is to do a positive study on effects of learning organization management outcomes of middle and small sized company on enterprise productivity among various types of outcome brought for strengthening of enterprise competitiveness. It confirmed learning organization has functions and usefulness as a management tool bringing positive effects on enterprise productivity through the Productivity improvement.
조유진,정근오,이윤희,이윤순,조영래,홍대기 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-
목적: to compare the surgical outcomes and the effects on health realted quality ( HRQOL) of total vaginal and single port laparoscopic hysterectomy . 방법: Among 121 patients who underwent hysterectomy for benign uterine lesions, 58 patients underwent total vaginal hysterectomy. 63patients underwent total single port laparoscopic hysterectomy. We analyzed the surgical and clinical parameters for the all patients. HRQOL data from the 36-item short form(SF-36) questionnaire were recorded in all patients. Surgical outcoms, complications, and HRQOL were compared between patients in two hysterectomy groups. 결과: There were no statistically significant differences in the age, uterine disease type, body mass index, blood loss, However, the number of previous operation( p=0.4 ) combined operation (p<0.01 )and complication rates (p<0.01 ) were increased in single port laparoscopic hysterectomy group. Mean operative time(p=0.03 ) was increased in vaginal hysterectomy group. All SF-36scales did not shows significant differences between two groups. For each groups, there were no significant changes of preoperative and postoperative HRQOL. 결론: Compared with total vaginal hysterectomy Total single port laparoscopic hysterectomy was preferred for the patients who had more previous operations and need other gynecologic intraabdominal operations. While Total single port laparoscopic hysterectomy can cause more complications and can not improve HRQOL.
구치부 지지의 상실과 마모로 인해 교합이 붕괴된 환자에서 수직고경 회복을 동반한 구강회복 증례
조유진,정수아,양홍서,박상원,임현필,윤귀덕,박찬,Jo, Yu Jin,Jung, Sua,Yang, Hong-So,Park, Sang-Won,Lim, Hyun-Pil,Yun, Kwi-Dug,Park, Chan 대한치과보철학회 2018 대한치과보철학회지 Vol.56 No.4
다수의 치아 상실과 치아 마모로 인해 교합이 붕괴된 경우 교합 고경의 변경이 필요할 수 있다. 그리고 이러한 경우 심미적이면서도 근신경계와 조화를 이룰 수 있는 고경을 결정하는 것이 중요하다. 본 증례는 치아상실 및 마모로 인해 교합 수직 고경의 감소가 관찰된 환자에서 진단 모형과 방사선 사진 및 다양한 임상적 검사 등의 교합관계분석을 통해 교합 수직 고경을 회복을 동반한 보철 수복을 진행한 경우로, 기능적인 면과 심미적인 면에서 양호한 결과를 얻었기에 이를 보고하는 바이다. Multiple tooth loss and excessive occlusal wear can result in damage to occlusal disharmony, functional disorders and esthetic problems, requiring comprehensive prosthetic treatments. Changing vertical dimension harmonized with surrounding muscle tissue is important. In this case, the patient with loss of vertical dimension caused by severe tooth loss and tooth wear was treated with the analysis of vertical dimension, such as diagnostic model, radiography and various clinical exams. the patient was satisfied with favorable functions and esthetics for 1 years of follow-up.
숲활동과 연계한 신체표현활동이 유아의 언어능력, 운동능력 및 자아존중감에 미치는 효과
조유진 한국영유아교원교육학회 2019 유아교육학논집 Vol.23 No.1
The purpose of this study is to find out the effects of physical expression activities linked to forest activities on young children’s language ability, motor proficiency ability, and sense of self-esteem. Research was carried out for 4 weeks with 32 four-year-old children (16 in an experimental group; 16 in a comparison group) who attended a kindergarten in D city. The experimental group participated in the physical expression activity linked to forest activity, while the comparison group participated in the physical expression activity based on story books. Language ability, motor proficiency ability, and sense of self-esteem were tested before and after the program was applied. Data were analyzed by independent sample T (T-test), utilizing a program for SPSS 23 Window. The results revealed a statistically-significance difference between the post-test scores of the experimental and comparison group. In conclusion, it shows that the physical expression activities linked to forest activities is effective for promoting young children's language ability, motor proficiency ability, and sense of self-esteem. 본 연구는 숲활동과 연계한 신체표현활동이 유아의 언어능력, 운동능력 그리고 자아존중감에 미치는 영향을 분석하는데 목적이 있다. 이를 위해 D시에 소재한 Y유치원의 4세 유아 32명(실험집단 16명, 비교집단 16명)을 대상으로 7주간 연구를 실시하였다. 실험집단은 숲활동과 연계한 신체표현활동을 비교집단은 그림책에 기초한 신체표현활동을 실시하였다. 사전과 사후에 언어능력, 운동능력, 자아존중감 검사를 실시하였으며 수집된 자료는 SPSS 23 Window용 프로그램을 활용하여 독립표본 t-검정(t-test)으로 통계 처리하였다. 연구결과 숲활동과 연계한 신체표현활동을 실시한 집단이 그림책에 기초한 신체표현활동을 실시한 집단보다 언어능력, 운동능력, 그리고 자아존중감에서 유의미한 효과를 보이는 것으로 나타났다.
GO-24 : Anatomical variations of the internal iliac veins at presacral area
조유진,정근오,이윤희,홍대기,조영래,박일수,이윤순 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
The purpose of this study was to classify the anatomic variation of internal iliac vein (IIV) during robotic or laparoscopic extended pelvic lymphadenectomy. Between March 2011 and July 2011, 60 consecutive patients underwent robot or laparoscopic extended lymphadenectomy. We retrospectively reviewed the video-clip and analyzed the pattern of the internal iliac veins at presacral area. IIV variations were classified seven types: type A, normal (n=39. 65%); type A with dilatated middle sacral vein (n=5, 8%); type B, left IIV connecting with the left external iliac vein centrally (n=5, 8%); type C, seperated trunk of the left IIV draining into the central left common iliac vein (CIV, n=1. 2%); type D, right IIV draining into the central left CIV (n=8, 13%); type E, right IIV draining into the central right CIV (n=0, 0%); and type F, the bilateral IIV connecting with each other before draining into the central left CIV (n=2, 3%). The prevalence rate of IIV anomalies was 26%, and the incidence of seperated trunks of the IIV was 18%. To avoid life-threatening the IIV injury during extended lymphadenectomy or sacral colpopexy, we should know the exact anatomical variations of IIV, especially type D and F.