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- 저자 : Yuka Kawamura (검색결과 2 건)
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Robust Kansei Design Based on Taguchi Method
Yuka Kawamura,Hideki Aoyama,Tetso Oya (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
During the design planning process in product development, aesthetic designs that can provide the desired impression are sought. For this reason, many scientific analysis methods for adjusting product designs closer to consumer preferences have been proposed. However, the creation of product designs that match consumer sensitivity, which varies extensively by individual, involves many problems. Using floral patterns as an example, this research proposes a control method to generate designs which meet individual consumer sensitivity based on the Taguchi method. First, floral patterns were constructed using a L36 orthogonal table. Next, the Kansei data of consumers was extracted using the SD method and Kansei words, and the Kansei SN ratio was calculated. The relationship between the design parameters and consumer sensitivity were then analyzed by multiple linear regression analysis and quantification theory 1. Finally, the floral patterns were reconstructed. The basic system for the proposed technique was built, and its usefulness was verified through experiments.
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Aging increases oxidative stress in semen
Mitsuru Nago,Akane Arichi,Naoki Omura,Yuka Iwashita,Toshihiro Kawamura,Yasushi Yumura 대한비뇨의학회 2021 Investigative and Clinical Urology Vol.62 No.2
Purpose: As age increases, oxidative stress increases, sperm motility decreases, and DNA fragmentation increases. To date, reports of age-related effects on semen have focused on reactive oxygen species (ROS) or total antioxidant capacity (TAC) as indicators of oxidative stress. However, assessments of ROS and TAC must be considered within a more comprehensive context in order to correctly evaluate oxidative stress and interpret findings. In this regard, the purpose of this study was to investigate the relationship between the static oxidation reduction potential (sORP) and paternal age with the goal of using the sORP as an indicator of semen oxidative stress. Materials and Methods: Semen samples from 173 men were analyzed for the following parameters: volume, motility, and beat cross frequency (BCF). The sORP was measured by using the MiOXSYS™ system. The correlation between semen parameters and the sORP level was analyzed as a function of age. The rate of sORP positivity was compared between men <34 and ≥34 years of age, with a positive sORP defined as a level ≥1.38. Results: Volume, motility, and BCF were negatively correlated with age (p<0.001). The semen sORP level was positively correlated with age (p<0.05). The rate of sORP positivity was significantly increased in men ≥34 years of age compared with that in men <34 years of age (33% compared with 12%, respectively; p<0.01). Conclusions: The sORP may play a role in age-related decreases in semen parameters (volume, motility, and BCF). The rate of sORP positivity increased significantly after 34 years of age.
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