Yongqiang Lyu

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The progress of VLSI technology is facing two limiting factors: power and variation. Minimizing clock network size can lead to reduced power consumption, less power supply noise, less number of clock buffers and therefore less vulnerability to variations. Previous works on clock network minimization are mostly focused on clock routing and the improvements(More)
With its reprogrammability, low design cost, and increasing capacity, field-programmable gate array (FPGA) has become a popular design platform and a target for intellectual property (IP) infringement. Currently available IP protection solutions are usually limited to protect single FPGA configurations and require permanent secret key storage in the FPGA.(More)
As smartphones and mobile devices are rapidly becoming indispensable for many network users, mobile malware has become a serious threat in the network security and privacy. Especially on the popular Android platform, many malicious apps are hiding in a large number of normal apps, which makes the malware detection more challenging. In this paper, we propose(More)
Quantitative assessment for cognitive load and mental stress is very important in optimizing human-computer system designs to improve performance and efficiency. Traditional physiological measures, such as heart rate variation (HRV), blood pressure and electrodermal activity (EDA), are widely used but still have limitations in sensitivity, reliability and(More)
Measurements of vital signs can be translated into accurate predictors of pregnant diseases, even at an early stage. They can also be combined with alarm-triggering systems to initiate the appropriate actions. Because of the emphasis on healthcare awareness and their specific needs, gravidae prefer regular vital signs monitoring in a flexible manner. Thus,(More)
Investigating new ways to deliver care, such as the use of self-service kiosks to collect and monitor signs of wellness, supports healthcare efficiency and inclusivity. Self-service kiosks offer this potential, but there is a need for solutions to meet acceptable standards, e.g. provision of accurate measurements. This study investigates the design and(More)
With the rapid development of Android phones, the users' requirements are increasingly demanding. But the huge power consumption has seriously affected the users' communication demands. In this article, we introduce the power management modules and Wake Lock mechanism of the Android system, and analyze the power consumption of it. And we used DC power(More)
In this paper we propose a novel binding mechanism that can protect FPGA IP from being cloned, tampered, or misused; and facilitate the pay-per-use licensing to limit the FPGA IP's execution to specific FPGA devices only. In this mechanism, the FPGA vendors will provide each enrolled device with a Physical Unclonable Function (PUF) that can be deployed(More)