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Wireless Personal Area Network-Based Assistance For The Visually Impaired, Kurt Matthew Peters
Wireless Personal Area Network-Based Assistance For The Visually Impaired, Kurt Matthew Peters
Electrical & Computer Engineering Theses & Dissertations
In this dissertation, a system allowing a visually impaired person to interact with his environment is developed using modern, low-power wireless communications techniques. With recent advances in wireless sensor networks, open-source operating systems, and embedded processing technology, low-cost devices have become practically feasible as a personal notification system for impaired people. Additionally, text-to-speech capabilities can now be employed without special application specific integrated circuits (ASICs), allowing low-cost, general-purpose processors to fill a niche that once required expensive semiconductors.
The system takes advantage of 802.15.4 and media access control (MAC) protocols offered by the open source operating system TinyOS. Important characteristics …
Detecting Compromised Nodes In Wireless Sensor Networks, Mary Lisa Mathews
Detecting Compromised Nodes In Wireless Sensor Networks, Mary Lisa Mathews
Electrical & Computer Engineering Theses & Dissertations
While wireless sensor networks are proving to be a versatile tool, many of the applications in which they are utilized have sensitive data. Therefore, security is crucial in many of these applications. Once a sensor node has been compromised, the security of the network degrades quickly if measures are not taken to deal with this event. There have been many approaches researched to tackle the issue. In this thesis, an anomaly-based intrusion detection protocol is developed to detect compromised nodes in wireless sensor networks.
The proposed protocol is implemented after the sensors are deployed into the environment in which they …