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The location and contextual status (indoor or outdoor) is fundamental and critical information for upper-layer applications, such as activity recognition and location-based services (LBS) for individuals. In addition, optimizations of building management systems (BMS), such as the pre-cooling or heating process of the air-conditioning system according to(More)
The back-pressure/max-pressure traffic signal control algorithm proposed in the existing literature is distributed, maximizes network throughput, and can be implemented without knowing traffic arrival rates. In this paper, we present an extended back-pressure traffic signal control algorithm, which can further handle bounded measurement/estimation noises in(More)
WiFi based Indoor Positioning System (IPS) has become the most popular and practical system to provide Location Based Service (LBS) in indoor environments due to the availability of massive existing WiFi network infrastructures in buildings. WiFi based IPSs leverage received signal strengths (RSSs) from large numbers of WiFi access points (APs) and estimate(More)
BACKGROUND Cadmium (Cd), lead (Pb) and arsenic (As) are common environmental contaminants that have been associated with lower birthweight. Although some essential metals may mitigate exposure, data are inconsistent. This study sought to evaluate the relationship between toxic metals, nutrient combinations and birthweight among 275 mother-child pairs. (More)
Motivated by the observation that traffic flows in urban networks may vary significantly both temporally and spatially, this paper introduces a new version of extended backpressure (EBP) traffic signal control algorithm. This algorithm can be responsive to different traffic flows by tuning control parameters over both time and location, and it tends to(More)
This paper documents the development of a quad-copter with indoor control scheme and navigation capability. A stabilized flying control system including traditional PID controller, Raspberry Pi onboard flight computer and electronic speed controller was developed to provide the basic platform for the quad-copter. PID tuning was utilized optimize the(More)
A novel high performance pipelined implementation architecture for user-defined floating-point complex division is presented. The major part of the proposed algorithm is derived from conventional Goldschmidt division algorithm. This paper first describes related user-defined floating-point arithmetic based on FPGA. Then the core of the complex division:(More)