• 대한물리의학회지
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• 제17권1호
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• pp.93-108
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• 2022

PURPOSE: This review sought to confirm the correlation between dual-task gait and cognitive function in cognitively impaired and healthy older adults. METHOD: We used four databases (DBs), Pubmed, Cochrane library, Kmbase, and Koreamed. Searches were carried out according to the PICOS method, P (participants) were the elderly (above 65 years) with cognitive decline, I (intervention) was walking with dual tasks, C (control group) comprised the elderly without cognitive decline, O (outcome) was the correlation between gait and cognitive function and S (study) was the cross-sectional study. For the methodological quality assessment of each study, we used the Quality Assessment Tool for Observation Cohort and Cross-Sectional Studies provided by the National Institutes of Health (NIH). RESULTS: A total of 10 articles were included in this systematic review. For the components of gait, we used pace, rhythm, and variability and we observed that mild cognitive impairment mostly causes low gait performance while performing dual tasks. Among the 10 articles, 9 articles studied pace, of which 7 showed significant results. However, 2 were not significant. Also, 1 article that studied rhythm and 3 articles that studied variability showed significant results. The methodological quality of the 10 studies was fair. CONCLUSION: Gait pace was found to have a high correlation between memory, which is a cognitive ability, and overall cognitive function. It was observed that older adults with mild cognitive impairment have reduced gait pace in single-task walking, and further decrease in dual-task gait pace shows the correlation between memory and gait pace during walking.

• 대한간호
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• 제19권5호통권108호
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• pp.74-76
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• 1980

• 디지털융복합연구
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• 제17권8호
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• pp.465-470
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• 2019

본 연구는 남자 일반부 K-1 1000m 결승 경기의 랩타임을 분석하여 경기력 향상을 위한 구간별 페이스 조절 전략을 모색하기 위해 실시되었다. 이를 위해 99회 전국체전 결승 경기의 랩타임을 250m 단위 구간으로 측정하였으며, 이 기록을 2018년도에 개최된 World Championship 남자 일반부 결승 경기의 랩타임 자료와 비교 분석하였다. 국내 최상위 선수들의 최종 기록 평균은 248.651초, 국제무대 최상위 선수들은 210.826초로 38초가량 경기력 차이가 난다. 랩타임별로는 250m 구간마다 8초, 11초, 6초, 13초 뒤처지는 기록을 나타냈다. World Championship 참가 선수들은 Fast-Maintain-Maintain-Spurt 전략을 쓰는 반면, 국내 선수들은 Fast-Slow-Fast-Slow의 페이스 조절 전략을 주로 쓰고 있었다. 국내 선수들은 경기력 향상을 위해, '빠른 스타트에 이은 중반 페이스 유지, 마지막 스퍼트'로의 전반적인 페이스 조절 전략 수정이 필요하다.

• Safety and Health at Work
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• 제13권2호
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• pp.220-226
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• 2022

Background: Research on the impact of psychosocial risks on well-being at work remains scarce in low- and middle-income countries, especially in the banking sector. This study sought to examine the relationships between job demands, job resources, well-being, job satisfaction, and work engagement in the Zimbabwean banking sector. Methods: An online survey was administered to 259 employees from five banks. Hierarchical multiple regression tested the relationships between job demands (quantitative demands, emotional demands, work pace, and work-family conflict), job resources (possibilities for development, social support from colleagues and supervisors, quality of leadership, and influence at work), well-being, work engagement, and job satisfaction. Interactions between all variables were tested. Results: Job demands were negatively related to well-being, work engagement, and job satisfaction. Job resources had positive relationships with the same. Work pace had positive relationships with well-being and work engagement. Influence at work moderated the relationship between emotional demands and work pace with well-being. Possibilities for development moderated the relationship between work-family conflict and well-being. Work-family conflict moderated the relationship between social support from colleagues and job satisfaction. Emotional demands, work pace, and quantitative demands moderated the relationship between influence at work with job satisfaction and work engagement. Conclusion: Job demands should be reduced where possible in order to enhance employee well-being, work engagement, and job satisfaction. The job resources that should be availed to facilitate a positive psychosocial work environment in the banking sector include social support from supervisors, influence at work, and possibilities for development.

• 대한화학회지
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• 제67권1호
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• pp.19-27
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• 2023

동물실험에 의존하는 전통적인 위해성평가 방법의 한계가 명확하게 드러나면서, 동물실험이 아닌 최첨단 기술을 활용한 화학물질 위해성평가 방법론들이 연구되고 있다. 이는 곧 신규접근법(New Approach Methodologies, NAMs)이라는 개념으로 구체화되었으며 차세대 위해성평가(Next generation risk assessment, NGRA) 프레임워크로 구현되었다. 하지만 신규접근법 데이터는 신뢰도 문제로 인해 극히 제한적으로 화학물질의 규제 의사결정과정에 활용되고있다. 이에 규제 공동협력기관 APCRA 이니셔티브는 화학물질 위해성평가에 신규접근법 데이터의 활용을 증진시키기 위해 여러 사례연구를 수행하였으며, 이를 바탕으로 차세대 위해성평가의 전망에 대해 논의한 바 있다. 따라서 본 총설에는 APCRA 이니셔티브가 수행한 사례연구 두 편을 중심으로 신규접근법을 활용한 차세대 위해성평가의 개념과 전망을 제시하였다.

• 한국자동차공학회논문집
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• 제19권1호
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• pp.25-31
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• 2011

The purpose of the study is to enhance the vehicle handling stability of the PACE formula vehicle. Required data for the dynamic analysis of the vehicle are as follows: Mass, moment of inertia, and tire's dynamic properties. Mass and moment of inertia data were calculated using Siemens NX 5.0 which results were verified with VIMF measurements of GMDAT. Dynamic data for the tire were supplied by Kumho Tire. Aerodynamic forces play an important role in the formula vehicle which forces were calculated by using Fluent. Full vehicle dynamic analysis using Carsim software has been carried out to find out the improvement of the vehicle stability by changing the shapes of the rear wing.

• 한국화재소방학회논문지
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• 제25권1호
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• pp.19-26
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• 2011

본 연구는 국내의 급격한 고령화추세와 그에 대응하기 위해 증가하고 있는 고령자시설의 피난안전설계를 위한 기초연구로서 일반인과 고령자의 군집형성시의 보행속도를 고령자의 위치와 비율에 차이를 두어 조사하였다. 조사결과 고령자가 전방에 배치되었을 때 평균 0.81m/s로 가장 감소하였으며, 고령자의 비율이 50%인 10명 배치되었을 때 0.85m/s로 가장 감소하였다. 국내의 경우 피난행통특성에 관한 연구는 전무하며 또한 실제적인 성능설계나 피난계획이 미홉한 실정이므로 향후 피난안전설계틀 위하여 고령자의 피난행동특성을 고려한 다양한 연구를 통한 DATA 확보가 시급할것으로 판단된다.

• Journal of Korea Trade
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• 제26권1호
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• pp.113-125
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• 2022

Purpose - The primary purpose of this study is to verify whether the target set out by the International Maritime Organization (IMO) for reducing carbon emissions from ships can be achieved by quantitatively analyzing the trends in technological advances of fuel oil consumption in the container shipping market. To achieve this purpose, several scenarios are designed considering various options such as eco-friendly fuels, low-speed operation, and the growth in ship size. Design/methodology - The vessel size and speed used in prior studies are utilized to estimate the fuel oil consumption of container ships and the pace of technological progress and Energy Efficiency Design Index (EEDI) regulations are added. A database of 5,260 container ships, as of 2019, is used for multiple linear regression and quantile regression analyses. Findings - The fuel oil consumption of vessels is predominantly affected by their speed, followed by their size, and the annual technological progress is estimated to be 0.57%. As the quantile increases, the influence of ship size and pace of technological progress increases, while the influence of speed and coefficient of EEDI variables decreases. Originality/value - The conservative estimation of carbon emission drawn by a quantitative analysis of the technological progress concerning the fuel efficiency of container vessels shows that it is not possible to achieve IMO targets. Therefore, innovative efforts beyond the current scope of technological progress are required.

• 대한간호
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• 제26권4호통권142호
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• pp.59-63
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• 1987

• Journal of Contemporary Eastern Asia
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• 제8권1호
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• pp.47-53
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• 2009