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3-axis accelerometer is a widely adopted device for applications such as fall detection of the elders, kinematic analysis, building/bridge/landslide monitoring, and so on. To retrieve the sensing data in real time, one may use a wireless module to forward those data to a gateway or server. For outdoor applications, Zigbee/IEEE 802.15.4 technology is often the candidate because it is cost effective...
To predict lower bounds on the performance of applications, the cloud should provide guarantees on bandwidth that each virtual machine can obtain. By competing for spare network bandwidth, current solutions that provide bandwidth guarantees can achieve work conservation as well. However, they usually fail to provide accurate bandwidth guarantees, for the interference between traffic for achieving...
With the approach of the aging society, collecting medical data of old patients becomes more and more important. Currently, there are a wide range of personal health devices (PHD), however, many of these devices have not been standardized and can't be compatible with the same manager. ISO/IEEE 11073 standard is a popular standard in collecting measurement data. In this paper, we propose a design of...
Computed Tomography angiography has become a major diagnostic imaging technique in patients suspected of having aortic diseases. However, aortic CTA needs a long scanning range, usually from subclavian artery to the origin of femoral arteries, which therefore includes high radiation dose. Besides of diagnostic value, aortic CTA is also used for follow-up as well as pre- and post-operative assessment...
Traditional Modbus/TCP server-side protocol includes in many inappropriate blocking I/O operations. These operations frequently lead to receiving thread blockage in the communication. To solve this problem, some improvements such as asynchronous non-blocking and multi-threading technology are done on the TCP network layer of Modbus/TCP, which are completed in S3C2440 server-side by Visual Studio 2005...
By analyzing the data transmission Collisions for wireless sensor networks, due to the shortage of energy efficiency and latency in MAC protocol, we propose a distributed TDMA scheduling protocol based on coloring algorithm (TDMA-CA), which uses spatial reuse of transmission channel. It allocates different colors for conflict nodes in the networks, and arranges distinct slots for data transmission...
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