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Taegu Lee,Junggyu Yoon 대한스포츠물리치료학회 2021 정형스포츠물리치료학회지 Vol.17 No.1
Purpose: This study is to see if the calf muscle movement affects the length of stride, symmetry, and ability to overcome obstacles, and muscle activity in patients with hemiplegia. Methods: Electromagnetic signals were first measured by ankle plantar flexion or muscle testing in a supine position with 12 patient ankle plantar flexor in the standing position. In the second measurement, the length and symmetry of stride are measured through the gait analyzer. In the third measurement, the ability to measure obstacles was measured. The paired- T test revealed a significant difference. Results: After the intervention, the step length was significantly decreased (p<.05), while the speed and failure rate of the obstacle overcoming was significantly decreased (p<.05). also muscle actvitiy was significantly increased (p<.05), and muscle power was significantly increased (p<.05). the different was statistically significant between pre- and post-intervetion. but after intervention, the gait symmetry was no significantly difference (p>.05), between pre- and post-intervention. Conclusion: The results of this study show that the length of stride, ability to overcome obstacles, muscular activity, and muscle strength are increased more after exercise. Therefore, it is a movement that requires patients with hemiplegia to aim for calf muscle exercise because it increases the length of step in their daily lives, overcomes obstacles, and has a positive effect on muscle activity and muscle strength.
디젤 엔진의 ATF 빠른 웜업 효과가 연비 특성에 미치는 영향
강태구(Taegu Kang),허형석(Hyungseok Heo),이동혁(Donghyuk Lee),이헌균(Heonkyun Lee),김태진(Taejin Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In recent years, various technologies have been introduced for the purpose of improvement of the fuel economy at cold start. In particular, the technologies of the temperature rise of the engine coolant and the fast warm-up are the mainstream of the research field. The temperature rise technology is implemented with an electric thermostat and the upward adjustment of the opening temperature of the thermostat. Also, the fast warm-up technology is utilized by means of an electric water pump, a clutch water pump, or EHRS(exhaust heat recirculation system). This paper deals with the impact on the fuel economy characteristics by ATF(automatic transmission fluid) fast warm-up effects using the EGR gas waste heat in a diesel engine. The fuel efficiency improvement from the ATF warm-up effect is 2.5% according to the results from a chassis dynamometer test.