COVID-19 기간 전 ․ 후에 따른 수영 선수의 폐활량과 무산소성 운동능력 및 체력의 비교 분석

박민혁 대한심장호흡물리치료학회 2024 대한심장호흡물리치료학회지 Vol.12 No.1

Purpose: This study aimed to investigate lung capacity, anaerobic exercise capacity, and fitness in high school swimmers before and after the COVID-19 pandemic. Methods: This study was conducted on 30 male high school swimmers and evaluated lung capacity, anaerobic exercise capacity, and fitness before and after the COVID-19 pandemic. The study analyzed measurement variables obtained from the group through IBM SPSS Statistics version 22.0, and an independent sample t-test was used to compare and analyze the lung capacity, anaerobic exercise capacity, and fitness of swimmers before and after the COVID-19 pandemic. Results: Statistically significant differences in back strength, sit-up, repeated jumps, whole-body reaction, and trunk forward flexion were found between the groups before and after the COVID-19 pandemic. The evaluation of the lung capacity and anaerobic exercise capacity of swimmers before and after COVID-19 pandemic did not find statistically significant difference between the groups. Conclusion: This study showed significant differences by group and will provide guidance on the development of a systematic training program for swimmers.

원자층증착법으로 증착된 산화하프늄 기반 강유전체 메모리 소자 응용의 리뷰

박민혁 한국표면공학회 2021 한국표면공학회 학술발표회 초록집 Vol.2021 No.6

산화하프늄 기반 박막에서 나타나는 강유전성은 2011년 Boescke 등에 의해 처음 발견된 이후 활발히 연구되고 있다. [1,2] 강유전체의 메모리반도체 소자에 대한 연구는 강유전체 자체의 내재적인 우수한 물성에도, 기존 페로브스카이트 구조 강유전체의 고집적도 정보 저장을 위한 소자 집적화 과정에서 나타나는 특성 열화로 기술적인 발전이 정체되어 있었다. 산화하프늄 기반 강유전체는 이미 양산되는 반도체 소자에 사용되는 산화하프늄이나 산화지르코늄과 같은 소재에서 도핑과 추가적인 열처리 등을 통해 유도될 수 있어, 집적도 측면에서 기존 페로브스카이트 구조 강유전체보다 크게 향상된 특성이 확인되었다. 하지만, 제한된 반복동작 횟수, Retention 시간, Wake-up effect 등의 신뢰성 문제와 다양한 요소에 의해 영향을 받는 다양한 준안전성 이차상의 생성 등 여전히 해결해야 할 문제가 많은 상황이다. 본 발표에서는 2011년 첫 보고가 있었던 이후 첫 10년간 진행된 강유전성 산화하프늄 기반 강유전체 연구에 대한 다양한 선행 연구 결과들을 리뷰하고, 앞으로 실제 응용을 위해 해결된 다양한 기초과학적, 기술적 이슈와 이에 대한 전망에 대해서 발표하고자 한다.

HfO₂ 기반 박막의 강유전성 강화를 위한 계면 제어 공정 연구

박민혁 한국표면공학회 2021 한국표면공학회 학술발표회 초록집 Vol.2021 No.12

400번의 구타 외 2편

박민혁 고요아침 2019 열린시학 Vol.24 No.3

전시관 스마트 도슨트의 어포던스 비교분석

박민혁,이정우 한국디지털정책학회 2022 디지털융복합연구 Vol.20 No.2

한국의 산업별 국내총생산과 전력소비 간 인과관계 분석

박민혁,이승은,노건기 한국에너지학회 2015 한국에너지공학회 학술발표회 Vol.2015 No.11

에너지 소비자 행태에 관한 분석

박민혁,최타관,박중구 한국에너지학회 2012 한국에너지공학회 학술발표회 Vol.2012 No.10

폐쇄형 SNS 이용자의 이용 동기 유형 분석: 이용자 경험을 중심으로

박민혁,이정우 한국주관성연구학회 2022 주관성연구 Vol.- No.59

Recently, the conversion from open SNS to closed SNS and the number of users using closed SNS have increased significantly. This study aims to understand and categorize the subjective perception structure of closed SNS users based on the motivation for use. Accordingly, a compliance framework was constructed using nine dimensions, focusing on usability, usefulness, and sensitivity, which are representative factors in the UX field. Based on this, a total of 34 Q samples were derived, and data were collected by selecting 40 people of various ages with experience in using closed SNS for more than 5 years as a P sample. As a result of the analysis based on the collected data, four types were derived: ‘Convenient Function Pursuit Type’, ‘Efficient Self-world Pursuit Type’, ‘Concerned Privacy Protection Type’, and ‘Tired Overload Evasion Type’. Overall, this study is meaningful in that it can be a reference material for establishing strategies to expand demand for closed SNS as a process of classifying user types based on personal and social values experienced by users in closed SNS. 최근 개방형 SNS에서 폐쇄형 SNS로의 전환 그리고 폐쇄형 SNS를 이용하는 이용자 수가 크게 증가하고 있다. 본 연구의 목적은 이용 동기를 기반으로 폐쇄형 SNS 이용자들이 가지는 주관적 인식구조를 이해하고 유형화하는 데 있다. 이를 위해 이용자 경험(UX) 분야에서의 대표적인 요인인 사용성, 유용성, 감성요인을 9개 차원을 구조화하여 준거의 틀을 구성하였다. 총 34개의 Q 표본을 도출하고, 폐쇄형 SNS를 5년 이상 이용한 경험이 있는 다양한 연령대의 인원 40명을 P 표본으로 선정하여 데이터를 수집하였다. 수집된 데이터를 기반으로 분석한 결과 ‘편리한 기능 추구형’, ‘효율적인 자기세계 추구형’, ‘우려하는 프라이버시 보호형’, ‘피곤한 오버로드 탈피형’ 등 네 가지의 유형이 도출되었다. 종합적으로, 본 연구는 폐쇄형 SNS에서 이용자가 경험하는 개인적이고 사회적인 가치들을 바탕으로 이용자 유형을 구분하는 과정으로써 폐쇄형 SNS의 수요 확대를 위한 전략 수립의 참고자료가 될 수 있다는 것에 의의가 있다.

파인다이닝 레스토랑의 서비스 품질이 서비스 가치, 고객 만족에 미치는 영향 연구

박민혁 한국식생활문화학회 2018 韓國食生活文化學會誌 Vol.33 No.6

This study aims to examine the causal relation to the effects of the service quality of fine dining restaurants on the service value and customer satisfaction, by targeting 310 customers with the experience in using the fine dining restaurants in Seoul. The results of this study are as follows. First, the quality of physical environment and interaction and result of fine dining restaurants had positive(+) effects on service value. Second, the quality of physical environment and interaction and result of fine dining restaurants had positive(+) effects on customer satisfaction. Third, service value had positive(+) effects on customer satisfaction. According to the result of this study, when customers visit fine dining restaurants, the evaluations of service quality such as interior design, kindness, accessibility, pleasant environment, good quality of food etc. are very important elements. The service quality has been verified as a very important factor for the evaluation of fine dining restaurants, so that the result of this study could be used for seeking for the measures for the improvement of service quality.

관상동맥 질환을 경험한 중년 남성의 심장재활 프로그램 시 비만도에 따른 심박수, 혈압, 심폐기능의 차이

박민혁,김상호 한국사회체육학회 2022 한국사회체육학회지 Vol.- No.88

Purpose: The purpose of this study is to assess the change in heart trea, blood pressure and cardiopulmonary function by the cardiac rehabilitation program depending on the degree of obesity in middle-aged men with coronary artery disease in Korea. Method: The subjects, 30 middle-aged males diagnosed with acute myocardial infarction, were divided into 15 control group (NOG) and 15 obese group (OG). For 8 weeks, sbujects were comparatively analyzed for the effects of the cardiac rehabilitation program on heart rat,e blood pressure and cardiopulmonary function according to obesity. Analysis was performed with a two-way reepated measure ANOVA to analyze the di-f ference between before and after the cardiac rehabilitation program for each subject. And a paired t-test was conducted to verify before and after changes. Results: The results of this study are as follows. 1) Rest heart rat eth, e interaction effect between the group and time, was found to have a statistically significant difference (p=.025). As a result of pre-post analysis within each group, there was a significant decrease in the NOG p(=.000). Maximum heart rate showed a signif-i cant difference according to the time of the main effect test p(=.020). 2) Blood pressure at maximal systolic showed a significant difference according to the time of the main effect test (p=.009). Pre-post analysis within each group showed a significant increase in the NOG (p=.037). 3) Maximum oxygen intake showed a significant difference according to the time of the main effect stet (p=.000). Pre-post analysis within each group was significantly increased in the NOG (p=.000), OG (p=.005). 4) Rate-pressure product at stage 3 showed a significant difference according to the time of the main effcet test (p=.045). Pre-post analysis within each group was significantly decreased in the NOG p(=.023). Rate-pressure product at maximal showed a signi-fi cant difference according to the time of the main effect test (p=.006). Pre-post analysis within each group was significantly increased in the NOG (p=.049), OG (p=.047). Conclusion: In summary, the findings in this study confirm that both gropus are effective in cardiac rehabilitation programs and that their effects are different. Therefore, various cardiac rehabilitation programs are needed and follow-up studies are required in the future.