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교정용 선재의 직경 증가를 위한 전기도금법과 무전해도금법의 비교연구
김재남,이기헌,황현식,성영은 전남대학교 치의학연구소 2002 구강과학 Vol.14 No.3
The purpose of this study was to evaluate electroless plating as a method to increase diameter of an orthodontic wire through comparison with eletroplating. After pretreatment for plating to the stainless steel orthodontic wire of 0.016 inch. the electoless plating was done under the condition of 90'c until the diameter of the wire was increased to 0.018 inch using Hessonic-Gr® which was sold by Shin-Pung metal. On the process of electroless plating the diameter of wire was measured every 5 minute to examine the increasing ratio of the wire's diameter per time unit. And to examine the uniformity, the diameter of each 3 points of the electroless-plated orthodontic wire was measured. An X-ray diffraction test was performed to analyze the nature of the plated metal and physical property test was made. Through the comparison with electroplating, following results were obtained. 1. In stiffness. yield strength, and ultimate strength of electroless plating wire group showed higher tendency than those of electroplated wire group, and in stiffness and ultimate strength there was statistically significant difference between two groups. 2. In the electroless plating wire group. the increasing ratio of the diameter was 0.O0461±0.00003 mm/5min (0.O0092 mm/min). In the electroplated wire group, that was 0.O0821±0.O0015 mm/min. 3. The results of uniformity test to measure the diameter of each 3 points showed a tendency of uniformity in all the two plating method. The results of this study suggest that the electroless plating wire is more close to the ready-made wire than electroplating wire in terams of the physical property. On the other hand. the length of plating time should be solved for the clinical application of electroless plating.
운동프로그램이 치매환자의 일상생활활동에 미치는 효과에 대한 체계적 고찰
김재남,이창대,박지혁 대한신경계작업치료학회 2015 재활치료과학 Vol.4 No.2
목적 : 본 연구의 목적은 운동 프로그램이 치매환자의 일상생활활동에 미치는 효과를 살펴본 연구에 대해서 분석하는 것이다. 연구방법 : 2007년부터 2014년까지 국외학술지에 게재된 논문을 Pubmed를 통해 검색하였다. 주요 검색용어로는 ‘dementia’,‘ alzheimer disease’, ‘exercise program’, ‘physical activity’, ‘activity of daily living’, ‘ADL’을 사용하였다. 최초 검색된 논문은 215편 이었으나 프로토콜을 거쳐 5편의 연구가 선정 되었다. 결과 : 선정된 논문의 Pedro score는 평균 7점으로 높은 편이었으며, 일상생활측정도구로 Katz index of ADLs, Bathel ADL index, IADL이 사용되었다. 연구들의 결과로는 실험군에서의 독립적인 일상생활수행능력의 유의미 한 향상이 나타났고 시간이 지남에 따라 독립적인 일상생활활동수행능력이 저하되는 것을 늦추었다. 결론 : 본 연구는 치매환자를 대상으로 한 운동프로그램의 임상적 적용에 대한 근거를 제시하였으며, 연구결과 독립 적인 일상생활활동을 수행하는데 효과적인 것으로 나타났다. 이와 같은 결과는 향후 임상가들이 치매환자의 독립 적인 일상생활수행능력을 향상키기 위한 운동프로그램의 기초자료를 제시하고, 효과적인 치료접근법을 개발하는 데 도움이 될 것으로 사료된다.
생산연령 근로자의 전반적인 일자리 만족도 영향 요인에 대한 구조모형분석
김재남 한국컴퓨터정보학회 2023 韓國컴퓨터情報學會論文誌 Vol.28 No.8
This study analyzes and verifies the relationship between job satisfaction by factor, organizational commitment, job satisfaction, and overall job satisfaction of working-age workers using a structural equation model. The research data used the 24th data of the Korean Labor and Income Panel Study. The subjects of the study were 8,024 workers in the production age of 15 to 64 as of 2021 among 9,132 people who correctly marked the values of the observation variables. As a result of the study, it was found that job satisfaction by factor had a positive impact on organizational commitment, job satisfaction, and overall work and job satisfaction. In addition, organizational commitment and job satisfaction were found to have a positively significant effect on overall work and job satisfaction. These results emphasize the importance of understanding and solving the unique problems faced by various types of workers in the labor market, ultimately providing important implications for organizations and policy makers to provide workers with an efficient working environment.