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Volume 43, Issue 5
Displaying 1-5 of 5 articles from this issue
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Seiji SAITO, Satoshi MURAKI, Yutaka TOCHIHARA2007 Volume 43 Issue 5 Pages 245-251
Published: October 15, 2007
Released on J-STAGE: March 15, 2010
JOURNAL FREE ACCESSThis study examined the effects of worn-out shoes on the lower limbs during walking in the elderly. Eight elderly male subjects walked at their own pace for 10m wearing four different pairs of worn-out shoes (combinations of two thicknesses at the heel portion and two lengths at the outer lateral portion) and one pair of normal shoes. Impact acceleration at the lateral malleolus, rearfoot angle, electromyography (EMG) of the lower limbs, and the center of pressure (COP) were measured during three randomly selected steps while walking. There were no significant differences in the rearfoot angle, EMG or COP, which failed to show any influence of the worn-out sole on shoe stability. However, shoes with the heel portion worn to 11mm increased the impact acceleration at the lateral malleolus. The findings of this study indicated that the impact acceleration especially in the elderly is affected by the decrease in shock absorption of the shoe due to sole attrition. This finding suggested that more consideration should be given to the abrasion of the heel portion in shoes for the elderly.View full abstractDownload PDF (5241K) -
Kay KAWAKAMI, Takashi KAWAMOTO, Nobutoshi YAMAZAKI2007 Volume 43 Issue 5 Pages 252-260
Published: October 15, 2007
Released on J-STAGE: March 15, 2010
JOURNAL FREE ACCESSAn office chair was developed to reduce leg swelling, which 90% of female VDT workers suffer from. Seat shape with forward incline part was proposed for short height female office workers who raise their seats depending on standard table height. The most comfortable forward incline position and angle were searched during VDT work in an upright trunk posture which is often seen in female office workers, by using an experimental chair with 16 divided plates. Leg swelling was measured using the bioelectrical impedance method. As a result, the seat shape with 15 degrees inclination from 20mm forward of gluteal furrow could reduce leg swelling and avoid discomfort in lower thigh and buttocks. Leg swelling, table/floor reaction and typing efficiency (speed, accuracy rate) of 10 female subjects during 1-hour VDT work were measured by using seat prototype with proposed seat shape and commercially offered chair. Seat prototype decreased leg swelling without increasing burden to arm and leg, and did not reduce working efficiency.View full abstractDownload PDF (11942K) -
On the appearance evaluation of Japanese tilefishMakoto NAKAMURA, Yuichiro TAIRA, Eiji MORIMOTO, Tomonori HASHIDATE, Ic ...2007 Volume 43 Issue 5 Pages 261-267
Published: October 15, 2007
Released on J-STAGE: March 15, 2010
JOURNAL FREE ACCESSThis study aims to develop a quality evaluation system for fish by modeling the knowledge of a fish market auctioneer. At first, the current system for Japanese tilefish in order to determine what aspects of the surface color and freshness of the fish the auctioneer uses for evaluation was assessed. As the result, it was clarified that the auctioneer focuses on the colors at five points on the surface of the fish. In addition, it was established that this evaluation approximately corresponds to the freshness of the fish. Furthermore, the statistical model created based on this method was found to be a highly accurate system for determining the quality of fish. These results demonstrate the validity of the proposed method, which utilizes the knowledge of the auctioneer in order to design a quality evaluation system.View full abstractDownload PDF (3172K) -
Yoshimoto HARANAKA, Makoto KURIHARA2007 Volume 43 Issue 5 Pages 268-276
Published: October 15, 2007
Released on J-STAGE: March 15, 2010
JOURNAL FREE ACCESSIn this study, we compared the driving behavior of 7 ordinary and 3 racing drivers, driving on a 20m radius circle at 30km/h and at high speed. At 30km/h, the average value of maximal lateral acceleration was higher for the ordinary driver group than for the racing drivers. Furthermore, at high speed, plow occurred at a lower average velocity for ordinary drivers than for racing drivers. We hypothesize that these differences exist because racing drivers driving at high speed, take advantage of the suspension system of the vehicle and control trajectory by throttle maneuvers. However, ordinary drivers driving at high speed control the trajectory of the vehicle by steering maneuvers.View full abstractDownload PDF (8091K) -
Toshiyuki YAMASHITA, Ahmad EIBO2007 Volume 43 Issue 5 Pages 277-281
Published: October 15, 2007
Released on J-STAGE: March 15, 2010
JOURNAL FREE ACCESSDownload PDF (770K)
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