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농구동호인의 참여 동기가 자아존중감 및 심리적 행복감에 미치는 영향
정성필,오현준 한국스포츠학회 2018 한국스포츠학회지 Vol.16 No.3
이 연구는 생활체육 농구동회에서 활동하는 회원들의 참여 동기가 자아존중감과 심리적 행복감에 미치는 영향에 대하여 알아보고자 2014년 202명의 호남지역의 농구동호회 남자회원을 모집단으로 설정하여 자료를 최종 분석하여 다음과 같은 결론을 얻었다. 첫째, 개인적 특성에 따른 차이에서 참여동기는 기술발달 요인에서 연령에 30대가 높았고, 심리적 행복감은 자신감 요인에서 미혼이 기혼 보다 높게 나타났다. 둘째, 참여정도에 따른 차이를 보면, 참여기간에서 기술발달요인, 참여빈도에서는 컨디션요인 그리고 참여시간에서는 즐거움 요인에서 유의한 차이가 나타났다. 셋째, 참 여 동기가 자아존중감에 미치는 영향에서 사교요인이 자아존중감에 긍정적 영향을 미쳤다. 참여 동기가 심리적 행복감 에 미치는 영향에서 건강/체력 요인이 집중력에, 사교와 기술발달 요인은 자신감에, 사교 요인은 자아도취와 즐거움에 긍정적 영향을 미쳤다. 결론적으로, 농구동호인의 참여 동기가 자아존중감 및 심리적 행복감에 긍정적인 영향을 미치는 것으로 나타났으며, 참여활동을 통해 신체적 건강과 다른 사람의 유대관계를 통한 자아존중감 및 심리적 행복감에도 영향을 미친다. The purpose of this study was to find out the effect of sports participation motivation on self-esteem and psychological happiness of male basketball club members. Total 202 questionnaires were collected from the basketball clubs in the southwestern region of Korea in 2014. First, the skill improvement showed high in 30's in the sub-scales of participation motivation and psychological happiness showed high in single group. Second, in analyzing by participation scales, it showed signigicant difference in skill improvement in participation period, condition in the frequency of participation and pleasure in participation time. Third, in analyzing the effects of participation motivation on self-esteem, the sociality affected positive influence on self-esteem. In analyzing the effects of participation motivation on psychological happiness, the concentration showed high in health/physical strength, confidence in sociality and skill improvement, and self- complacence and pleasure on sociality, respectively. As a result, it revealed that sports participation motivation of male basketball club members partially affects positive influence on self-esteem and psychological happiness.
A Study on Thermal Characteristic Analysis and Shape Optimization of a Ventilated Disc
정성필,박태원,김영국 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.
In this study, an analysis technique that can estimate the temperature rise and thermal deformation of the ventilated disc considering vehicle information, braking condition and properties of the disc and pad is developed. The analytical process of the braking power generation during braking is mathematically derived. The thermal energy that is applied to the surface of a disc as heat flux is calculated when a vehicle is decelerating from 130 km/h to 0 km/h with deceleration of 0.4 g. Then,the temperature rise and thermal deformation of a disc are calculated through the thermo-mechanical analysis by using SAMCEF code. The shape of the cross section of the disc is optimized according to the response surface analysis method in order to minimize the temperature rise and thermal deformation. As a result of optimization, it is concluded that the temperature rise and thermal deformation of the disc become minimum at the same condition. The hot judder analysis is carried out using the original and optimized disc to validate the optimization result.
A study on the optimization method for a multi-body system using the response surface analysis
정성필,박태원,전갑진,윤지원,이수호,정원선 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.4
An optimization method, which minimizes the characteristic value of a system using response surface analysis, is presented. Plackett-Burman design is used as a screening method. Using the response surface analysis, second order recursive model function is estimated as an objective function. To verify the reliability of the model function, an F-test based on the analysis of variances table is used. Lastly, the sequential quadratic-programming method is used to find the value of design parameters. By applying the preceding procedure to a multi-body dynamic model, the optimization process presented in this study is verified.
정성필,이석우,양영모,하영록,김승환,유인술 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3
Background: This study was designed to review the cases of patients who had undergone diffusion-weighted magnetic resonance imaging(DWI) in the emergency department(ED), and to investigate its clinical usefulness and current indications. Methods: We analyzed the cases of 152 consecutive patients who underwent DWI in the ED from Jan to Mar 2001. DWI was obtained with the use of a multislice, single-shot, spin-echo plana imaging technique(GE SignaR). Imaging time was less than one minute. The medical records, the DWI films and the computed topography results were reviewed. We investigated the chief complaint, initial findings of physical examination, final diagnosis, decision-making department, interval from admission to imaging, and DWI findings. Results: DWI showed positive findings of high signal intensity in 84 patients(55.3%). Among the 68 patients who yielded a negative result, false negative occurred with 12 patients(17.6%): 10 lacunar infarctions, a pons infarction, and a brainstem infarction. Eleven patients were determined as having a cerebral hemorrhage, all of whom showed the abnormal finding of a mixed signal in DWI. The sensitivity and the specificity of DWI to rule out stroke were 85.5% and 98%, respectively. Current indications for DWI in our ED are age older than 60, alert mental status, and one of the symptoms or signs among lateralyzing sign, language disturbance, and dizziness/vertigo. Conclusion: DWI was highly specific to rule out stroke, so emergency care professionals should be familiar with this new technology. Further prospective study is required to determine the proper indications and clinical usefulness of DWI in the ED.