The purpose of this study is to analyze the effects of the combined re-covery method of cold water immersion (CWI) and protein supplement intake after eccentric exercise that causes muscle fatigue in elite soc-cer players. Eleven semiprofessional soccer players participated in this study. Participants were divided into CWI group, combined protein and CWI group (PCWI), and passive resting group (CON). The participants completed the eccentric exercise for one hour and performed one of three recovery methods. The muscle strength of the quadriceps and hamstring muscles significantly decreased at 48-hr postexercise com-pared to before exercise in all recovery groups (<i>p</i><0.05), with no signifi-cantly different between the recovery groups. The time required to sprint 40 m was significantly longer in all groups at 24 hr and 48 hr after exercise than before exercise (<i>p</i><0.05). The vertical jump height was significantly decreased at 48 hr after exercise compared to before ex-ercise in the CON and CWI groups (<i>p</i><0.05). The muscle soreness val-ues were higher at 6 hr, 24 hr, and 48 hr after exercise than before exer-cise in all groups (<i>p</i><0.001). The perceived recovery quality was re-duced after exercise in the PCWI (<i>p</i><0.01) and CON groups (<i>p</i><0.001) compared to before exercise; it was unchanged in the CWI group. The recovery quality decreased at 6 hr, 24 hr, and 48 hr after exercise in all recovery groups (<i>p</i><0.01). In conclusion, the combined recovery meth-od was less effective than CWI alone for the recovery of exercise per-formance.

In this paper, a sensor bias estimation method with pseudo measurement for asynchronous multisensor systems is proposed. The proposed bias estimation method separates the local filter which estimates the target state with biased measurements into two parts, one is bias part, the other is target state part. By using these two parts, the algorithm generates the pseudo bias measurement for estimating bias, and then eliminates bias of local track through bias compensation. Finally, the proposed algorithm is evaluated by comparing with the existing EXX method. [7] 가 있으나 바이어스 항의 dimension증가에 따라 계산량이

A high power laser beam focused on a small area accelerates a thin material that flies and hits other target material in which a shock wave may be induced. This laser induced shock experimental method is more repeatable and cheaper but worse than other experimental method using gas gun or other apparatus. An optical system including a phase zone plate reduces the interference and also makes the focused-beam-intensity distribution uniform. We wrote a computer code that calculates light ray traces. Using the code we designed and fabricated an optical system including a phase zone plate and improved the laser-beam uniformity. We introduce preliminary experimental results of laser induced shock of the samples such as aluminum and other materials.

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