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This paper proposes a copyright protection scheme for color images using secret sharing and wavelet transform. The scheme contains two phases: the share image generation phase and the watermark retrieval phase. In the generation phase, the proposed scheme first converts the image into the YCbCr color space and creates a special sampling plane from the color(More)
Power conservation is a very important aspect of modern-day technology. With its long life and low energy consumption, the high power light emitting diode (HP LED) has become very popular for lighting purposes. The die attachment layer is an important component of an HP LED package that is susceptible to thermal fatigue failure and therefore affects the(More)
Department of Business and Entrepreneurial Management, Kainan University, No. 1, Kainan Road, Luchu, Taoyuan 33857, Taiwan, ROC Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC Department of Mechanical Engineering and Graduate Institute of Industrial Engineering, National Taiwan(More)
Hysteresis phenomenon has been observed in the operations of both horizontal-axis and vertical-axis wind turbines (HAWTs and VAWTs). In this study, wind tunnel experiments were applied to investigate the characters of hysteresis phenomena between the angular speed and the external resistance of electrical loading during the operation of a Darrieus type(More)
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