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This paper investigates the problem of energy consumption in wireless sensor networks. Wireless sensor nodes deployed in harsh environment where the conditions change drastically suffer from sudden changes in link quality and node status. The end-to-end delay of each sensor node varies due to the variation of link quality and node status. On the other hand, the sensor nodes are supplied with limited...
This paper investigates the MAC protocol tailored for wireless sensor networks deployed in the intertidal environment (IT-WSNs) where the ebb and flow of the tide influence the packet transmission. Most packets fail to be delivered when the sensor node is submerged by seawater during high tide. To deal with it, an environment-aware electrode module is designed to detect the tide level and determine...
Diabetes adversely impacts many organ systems including the skeleton. Clinical trials have revealed a startling elevation in fracture risk in diabetic patients. Bone fractures can be life threatening: nearly 1 in 6 hip fracture patients die within one year. Because physical exercise is proven to improve bone properties and reduce fracture risk in non-diabetic subjects, we tested its efficacy in type...
In spite of the recent rapid growth in stretchable electronic device research, efforts have been mainly focused on material selection, device geometric design and short-term performance characterization. The present research focuses on the long-term durability of electromechanical and electrochemical performance of buckled carbon nanotube fibers based stretchable conductors and supercapacitors under...
Muscle and bone are known to act as a functional unit and communicate biochemically during tissue development and maintenance. Muscle-derived factors (myokines) have been found to affect bone functions in vitro. However, the transport times of myokines to penetrate into bone, a critical step required for local muscle–bone crosstalk, have not been quantified in situ or in vivo. In this study, we investigated...
The menisci are known to play important roles in normal joint function and the development of diseases such as osteoarthritis. However, our understanding of meniscus' load bearing and lubrication properties at the tissue level remains limited. The objective of this investigation was to characterize the site- and rate-dependency of the compressive and frictional responses of the meniscus under a spherical...
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