산화철/Fe(2)과 시멘트 수화물/Fe(2)을 이용한 TCE 분해의 유효성분

김홍석,이유정,김하얀,황인성 대한환경공학회 2007 대한환경공학회 학술발표논문집 Vol.2007 No.12

Current and Future Burden of Periprosthetic Joint Infection from National Claim Database

김홍석,Jung Wee Park,Sun-Young Moon,이영균,하용찬,구경회 대한의학회 2020 Journal of Korean medical science Vol.35 No.49

Background: Periprosthetic joint infection (PJI) is the most serious complication after total joint arthroplasty. The incidence and burden of PJI in North America have been reported. There might be potential differences according to ethnics and regional practices between western countries and East Asia. Nevertheless, its incidence in East Asia remains unknown. We aimed to evaluate the incidence and economic burden of PJI in Korea and to project the future burden. Methods: We identified numbers of total hip arthroplasties, total knee arthroplasties and PJIs in Korea from 2010 to 2018 using medical claim data of Korean Health Insurance and Review and Assessment. Annual incidence and medical cost of PJI were calculated. We projected future burden of PJI through 2030 using Quasi-poisson regression model. Results: The annual incidence of PJI ranged from 2.3% to 2.8% and the average cost per each PJI patient ranged from $4,361 to $6,016. Total annual cost of PJI increased from $8.0 million in 2010 to $18.0 million in 2018 and was projected to exceed $57.0 million by 2030. Conclusion: The incidence of PJI in Korea is comparable with reported PJI incidence of 2.0%–2.7% in the United States. Our findings would be used for worldwide comparison of PJI epidemiology and establishment of healthcare policies for PJI in East Asia.

1차슬러지 산발효여액을 활용한 외기환원전극 미생물연료전지에서 반응조 부피에 따른 전력발생 특성 평가

김홍석,김병군 대한환경공학회 2017 대한환경공학회 학술발표논문집 Vol.2017 No.11

일본교회의 거듭나기

김홍석 미래사목연구소 2019 사목정보 Vol.12 No.1

A Study on the Simultaneous Application of Fuel Properties Alteration and EGR in a DI Diesel Engine

김홍석,최승훈 한국기계기술학회 2017 한국기계기술학회지 Vol.19 No.4

In this study, the possibility of biodiesel fuel and oxygenated fuel(dimethoxy methane, DMM) was investigated as an alternative fuel for a naturally aspirated direct injection diesel engine. The smoke emission of blending fuel (diesel fuel 90vol-% + DMM 10vol-%) was reduced approximately 70% at 2500rpm, full load in comparison with the diesel fuel. Engine power and brake specific energy consumption showed no significant differences. But, NOx emission of biodiesel fuel and DMM blended fuel increased compared with commercial diesel fuel due to the oxygen component in the fuel. It was needed a NOx reduction counter plan that EGR method was used as a countermeasure for NOx reduction. It was found that simultaneous reduction of smoke and NOx emission was achieved with diesel fuel (95 vol-%) and DMM (5 vol-%) blended fuel and cooled EGR method (15%).

세척 및 열탈착 공법을 이용한 해안지역 복합오염 준설토 정화 및 친환경성 평가

김홍석,임상순,지윤환,김강석,강완협,조은혜,정준교 대한환경공학회 2017 대한환경공학회 학술발표논문집 Vol.2017 No.11

국산 CRT모니터 ICC 프로파일의 평가 및 개선에 관한 연구

김홍석,박승옥,정연우,김성현 한국광학회 2001 한국광학회지 Vol.12 No.6

ICC profiles of output devices are necessary to solve the problem of color inconsistency between output devices. Therefore, output device manufacturers are offering ICC profiles that encode each model\`s color characteristics according to the specification decided in ICC (International Color Consortium). In this study, a program that can decode data of ICC profile was composed and evaluated the present condition of ICC profile files of domestic CRT monitor. As a result of comparing the ICC profiles of various model\ulcorner selling since 1999 from LG and Samsung companies, it was found that ICC profiles that are made at a similar time are the same regardless of model\`s specification and in some profiles, extraordinary data are saved. Accordingly, it can be said that current ICC profiles are made independently of the real monitor\`s color characteristics. This paper shows how color characteristics of a real monitor are affected by the control of brightness and color temperature, and proposes that the ICC profile has to be made from the data. measured in the optimum brightness state at each color temperature setting. 컬러영상의 색이 출력장치에 따라 달라지는 문제점을 해결하기 위해서는 출력장치의 ICC프로파일이 필수적으로 필요하다. 따라서 출력장치 제조회사에서는 ICC(International Color Consortium)에서 정한 양식에 따라 각 모델의 색 특성 데이터를 부 호화한 ICC프로파일을 제공하고 있다. 본 연구에서는 ICC 프로파일의 데이터를 디코딩 할 수 있는 프로그램을 구성하여, 국산 CRT모니터의 ICC 프로파일들의 정확도를 평가하였다. 삼성과 LG사에서 1999년 이후 판매하고 있는 다양한 모델의 17 인치 CRT모니터의 프로파일들을 비교한 결과, 비슷한 시기에 만들어진 프로파일들은 모델의 사양에 관계없이 동일한 데이터를 저장하고 있고 또한 일련의 프로파일들에는 엉뚱한 데이터가 동일하게 저장되어 있었다. 이로부터 현재 제공되고 있는 ICC프로파일들은 실제 모니터의 색 특성과는 무관하게 만들어지고 있음이 밝혀졌다. 본 논문에서는 실제 모니터의 색 특성이 모니터의 밝기와 콘트라스트 그리고 색온도 조절에 어떤 영향을 받는가를 보이고, 최적의 밝기상태에서 측정된 색 특성 데이터가 저장된 ICC 프로파일이 색 온도별로 만들어져야함을 제안하였다.

태권도 수련가정과 퇴관가정의 경영 인식 비교분석

김홍석,장환민 한국체육과학회 2007 한국체육과학회지 Vol.16 No.2

The purpose of this thesis is to find and propose the management of Taekwondo gym of maintaining and withdrawal of members and to achieve the customer's satisfaction management strategy. In order to verify the statistical results, 486 Taekwondo gym members and 193 theirs' parents were set as the survey purposes on the date of 1st of April, 2006. Questionnaires were used as research tool and the coefficient was between .626 and .946. The results showed that children's reason of drop-out exercise Taekwondo was different by grade, attendance length, and their belt's color etc. Orderly, the reason of drop-out about trainees was "to go to another institute", "lost interesting", and "too tired". The reason of drop-out about parents was "to go to another institute", "lost interesting", and "economic reason". And there was found difference in Children's satisfaction for Taekwondo academy's environment, teacher, and program.

생활체육 참가 직장인의 사회적 역할수행 및 자기신뢰와 조직몰입 간에 조직공정성의 매개효과 연구

김홍석 한국체육과학회 2007 한국체육과학회지 Vol.16 No.2

The purpose of this paper is to examine the validity of the relationship between social role and self-reliability and oragnizational commitment and the mediating effects of organizational justice of workers participating in sport for all.To perform this empirical study, the data for the present study were collected from one firms through questionnaire and all measures were self-administred by respondents.To analyze this data, reliability test and correlation analysis was adopted to analyze the casual relationship the relationship between social role and self-reliability and organizational commitment and the mediating effects of organizational justice of workers participating in sport for all.The major findings of this study are as follows;First, It was verified that organizational justice was influenced by social role and self-reliablilty. Second, It was verified that organizational commitment was influenced by social role and self-reliablilty Third, It was verified that organizational commitment was influenced by organizational justice.Forth, it verified that social role and sefl-reliablilty was influenced by organizational commitment according to moderatoring of the organizational justice.

자기조절학습과 부모학습관여형태에 따른 전환기 초등학생의 학업성취수준

김홍석,심혜숙 한국상담학회 2009 상담학연구 Vol.10 No.4

The purpose of this study was to examine the differences of self-regulated learning and parents' learning involvement type according to the level of academic achievement, and also the relationships between self-regulated learning and parents' learning involvement type for the students who are in a transitional stage from elementary to middle school. The subjects of this study were 423 students who were in the sixth grade in an elementary school in Pusan and Ulsan. The test tools were the 2008 National Assessment of Education Achievement(NAEA), Self-regulated learning and Parents' learning involvement type. The collected data were analyzed One-way ANOVA and Correlation. The results of this study were as follows: First, the higher if academic achievement level, the higher of self-regulated learning. Second, the high group in academic achievement level was higher in parents' learning involvement type than the low group. Third, there were significant correlations between self-regulated learning and parents' learning involvement type. Possible reasons for this result were identified and discussed. 본 연구는 초등학교에서 중학교로 진학하는 전환기 학생의 자기조절학습과 부모학습관여형태에 따른 학업성취수준을 살펴보고, 또한 자기조절학습과 부모학습관여형태의 관계를 알아보고자 부산과 울산의 4개 초등학교 6학년 학생 총 423명을 대상으로 검사를 실시하였다. 학업성취수준은 국가수준 학업성취도 평가를 사용하였으며, 자기조절학습과 부모학습관여형태는 설문지를 작성하는 방법으로 실시하였다. 자료분석은 일원변량분석과 상관분석을 실시하였으며, 그 결과, 첫째, 자기조절학습에 따른 학업성취수준 차이에서는 학업성취 상집단이 중집단보다 높았으며, 중집단은 하집단보다 자기조절학습이 높게 나타났다. 즉 학업성취가 높을수록 자기조절학습능력이 높음을 알 수 있다. 둘째, 부모학습관여형태에 따른 학업성취수준 차이에서는 학업성취 상집단이 하집단보다 유의미하게 높게 나타났다. 셋째, 자기조절학습과 부모학습관여형태의 관계는 유의미한 정적 상관이 나타났다. 이러한 결과들은 학업성취를 높이기 위해서 부모가 자녀의 학습지도를 할 때, 자녀에게 보다 많은 자율성과 학습정보제공을 해주는 것이 필요함을 시사하고, 또한 높은 학업 성취를 위해서 자기조절학습 능력을 향상시킬 필요가 있음을 제시 한다고 볼 수 있다.