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Localization using the characteristics of the Radio Frequency (RF) in wireless sensor networks is attractive because the method does not require additional measuring devices, and hence satisfies low cost and low power consumption needs. The range information derived from Received Signal Strength (RSS), which attenuates over the distance and node connectivity, is, however, inaccurate and unpredictable...
Many indoor localization techniques that rely on RF signals from wireless Access Points have been proposed in the last decade. In recent years, research on crowdsourced (also known as “Organic”) Wi-Fi fingerprint positioning systems has been attracting much attention. This participatory approach introduces new challenges that no previously proposed techniques have taken into account. This paper proposes...
Sickle Cell Disease (SCD) is a common chronic inherited disorder of red blood cells requiring careful pain management, particularly for youth. Clinicians and researchers have developed efficient pain management methods, from the traditional paper and pencil method to the computer-based electronic diaries (e-Diary). With the recent proliferation of smartphones and the advancement in mobile Internet...
Recent technological advances in miniaturization of wireless portable bio-sensors and the versatility of smart phones have enabled the design and proliferation of continuous mobile health monitoring. A single smart phone is used as a gateway that interconnects sensors and remote servers in many health networking platforms. However, previous implementations lack a thorough assessment of the phone as...
Wireless sensors with accelerometers are widely used in various studies on human body movements. The most challenging problem in a small body-attachable sensing unit is how to maximize the battery lifetime. Previously, the preferred approach was to reduce the number of transmissions through data compression. Compressed Sensing(C-S) is an emerging alternative approach that aggressively reduces the...
Providing vehicles' position is essential in VANETs. Currently, GPS positioning is widely used, but the accuracy is not adequate for emerging safety applications. In order to provide accurate positioning, this paper proposes RF-GPS, a RFID-assisted localization system that reliably supports lane-level position accuracy. It improves accuracy of the GPS system by employing a DGPS-like concept. It also...
Determining the positions of nodes is essential in many applications and geographic routing protocols of Wireless Sensor Networks. Since localization is a fundamental component of sensor networks, the cost for localization itself should be minimized. In this paper, we focus on developing a localization algorithm which provides both low-cost and accuracy. Considering these requirements, we propose...
Many low-cost localization techniques have been proposed for wireless sensor networks. However, few consider the mobility of networked sensors. In this paper, we propose an effective and practical localization technique especially designed for mobile sensor networks. Our system is based on the sequential Monte Carlo method, but dissimilar to other conventional localization schemes, our algorithm covers...
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