The “Wireless Sensor Networks for City-Wide Ambient Intelligence (WISE-WAI)” Project

This paper gives a detailed technical overview of some of the activities carried out in the context of the “Wireless Sensor networks for city-Wide Ambient Intelligence (WISE-WAI)” project, funded by the Cassa di Risparmio di Padova e Rovigo Foundation, Italy. The main aim of the project is to demonstrate the feasibility of large-scale wireless sensor network deployments, whereby tiny objects integrating one or more environmental sensors (humidity, temperature, light intensity), a microcontroller and a wireless transceiver are deployed over a large area, which in this case involves the buildings of the Department of Information Engineering at the University of Padova. We will describe how the network is organized to provide full-scale automated functions, and which services and applications it is configured to provide. These applications include long-term environmental monitoring, alarm event detection and propagation, single-sensor interrogation, localization and tracking of objects, assisted navigation, as well as fast data dissemination services to be used, e.g., to rapidly re-program all sensors over-the-air. The organization of such a large testbed requires notable efforts in terms of communication protocols and strategies, whose design must pursue scalability, energy efficiency (while sensors are connected through USB cables for logging and debugging purposes, most of them will be battery-operated), as well as the capability to support applications with diverse requirements. These efforts, the description of a subset of the results obtained so far, and of the final objectives to be met are the scope of the present paper

RESTful management system for Wireless Sensor Network devices

The thesis has been conceived at the SigNET laboratory of the University of Padova. The project has consisted on the design and the development of a software system for managing the devices that compose a Wireless Sensor Network. The created software is based on the REST architectural style, so it has been designed to provide the access to the network functionalities by offering web resources to the clients. The heart of the project is focused on the management of the elaborative nodes of the network. These devices have a direct control on the sensor nodes. The developed software runs on them as an internal daemon, with the aim of monitoring the state of the sensors and managing the requests of the users. The project has also included the creation of a Web Application with which integrate the functionalities provided by WebIoT, a multi-platform Web Application created by the SigNET research group. The aim of this part of the work was making the system transparent to the users. All the implementation choices have been made with a particular attention to ensure high levels of modularity, portability and scalabilit

A Java application to display temperature, humidity and luminosity in a Wireless Sensor Network

The aim of this thesis is to develop a Java application, using Android platform, to display in a mobile device the values taken by a Wireless Sensor Network (WSN). For this purpose, in this papers, firstly I give a general vision of what the Wireless Sensor Networks are. In particular, I wished to provide a comprehensive analysis of the main component of the WSN: the sensor node. I describe its hardware and software structural. The second part of the thesis is dedicated to the implementation of the application. It is listed which software were useful to the development and it explained how the application has been built. In the last part of the thesis it is shown the graphical result of the work obtainedope

On Mobility Management in Multi-Sink Sensor Networks for Geocasting of Queries

In order to efficiently deal with location dependent messages in multi-sink wireless sensor networks (WSNs), it is key that the network informs sinks what geographical area is covered by which sink. The sinks are then able to efficiently route messages which are only valid in particular regions of the deployment. In our previous work (see the 5th and 6th cited documents), we proposed a combined coverage area reporting and geographical routing protocol for location dependent messages, for example, queries that are injected by sinks. In this paper, we study the case where we have static sinks and mobile sensor nodes in the network. To provide up-to-date coverage areas to sinks, we focus on handling node mobility in the network. We discuss what is a better method for updating the routing structure (i.e., routing trees and coverage areas) to handle mobility efficiently: periodic global updates initiated from sinks or local updates triggered by mobile sensors. Simulation results show that local updating perform very well in terms of query delivery ratio. Local updating has a better scalability to increasing network size. It is also more energy efficient than ourpreviously proposed approach, where global updating in networks have medium mobility rate and speed

Distributed Computing and Monitoring Technologies for Older Patients

This book summarizes various approaches for the automatic detection of health threats to older patients at home living alone. The text begins by briefly describing those who would most benefit from healthcare supervision. The book then summarizes possible scenarios for monitoring an older patient at home, deriving the common functional requirements for monitoring technology. Next, the work identifies the state of the art of technological monitoring approaches that are practically applicable to geriatric patients. A survey is presented on a range of such interdisciplinary fields as smart homes, telemonitoring, ambient intelligence, ambient assisted living, gerontechnology, and aging-in-place technology. The book discusses relevant experimental studies, highlighting the application of sensor fusion, signal processing and machine learning techniques. Finally, the text discusses future challenges, offering a number of suggestions for further research directions

Sviluppo di driver per sensoristica ambientale in scenari Internet of Things

Nella presente viene data una generale descrizione di Internet of Things, delle WSN e alcuni progetti al riguardo, degli attuali sensori di CO2 ed in particolare alla tecnologia NDIR. Segue la descrizione dell'attività svolta presso Patavina Technologies srl dove è stato sviluppato un driver per microcontrollore AVR Atmel utile a pilotare un sensore NDIR prodotto da Alphasense. Infine, verranno riportati graficamente dati relativi al funzionamento del sensore e sviluppi futuri del driverope

T-Patterns Revisited: Mining for Temporal Patterns in Sensor Data

The trend to use large amounts of simple sensors as opposed to a few complex sensors to monitor places and systems creates a need for temporal pattern mining algorithms to work on such data. The methods that try to discover re-usable and interpretable patterns in temporal event data have several shortcomings. We contrast several recent approaches to the problem, and extend the T-Pattern algorithm, which was previously applied for detection of sequential patterns in behavioural sciences. The temporal complexity of the T-pattern approach is prohibitive in the scenarios we consider. We remedy this with a statistical model to obtain a fast and robust algorithm to find patterns in temporal data. We test our algorithm on a recent database collected with passive infrared sensors with millions of events

Progettazione e sviluppo di un sistema cromoterapico mediante una rete di sensori wireless

The work of this thesis consists in the development and implementation of a chromotherapy system based on a WSN. The system is independent from the environment in which is installed and is very flexible. The nodes of the system interact with each other to synchronize themselves and to disseminate the color sequence to display. The system is also able to recognize if topology changes occur and is also able to reconfigure itself accordingly without affecting the nodes synchronization. SOMMARIO Questo lavoro di tesi è consistito nello sviluppo e nella relativa implementazione di un sistema cromoterapico basato su di una rete di sensori wireless. Il sistema è indipendente dall’ambiente nel quale viene installato risultando perciò molto flessibile nell’utilizzo. Ogni nodo della WSN interagisce con gli altri cercando di creare una rete sincronizzata e permettendo la diffusione e la visualizzazione di una sequenza di colori atraverso un device RGB esterno Il sistema può inoltre riconoscere se un cambiamento topologico sta avvenendo nella rete ed è in grado di riconfigurarsi di conseguenza senza influire sulla sincronizzazione dei nod

Advanced sensors technology survey

This project assesses the state-of-the-art in advanced or 'smart' sensors technology for NASA Life Sciences research applications with an emphasis on those sensors with potential applications on the space station freedom (SSF). The objectives are: (1) to conduct literature reviews on relevant advanced sensor technology; (2) to interview various scientists and engineers in industry, academia, and government who are knowledgeable on this topic; (3) to provide viewpoints and opinions regarding the potential applications of this technology on the SSF; and (4) to provide summary charts of relevant technologies and centers where these technologies are being developed

On Mobility Management in Multi-Sink Sensor Networks for Geocasting of Queries

In order to efficiently deal with location dependent messages in multi-sink wireless sensor networks (WSNs), it is key that the network informs sinks what geographical area is covered by which sink. The sinks are then able to efficiently route messages which are only valid in particular regions of the deployment. In our previous work (see the 5th and 6th cited documents), we proposed a combined coverage area reporting and geographical routing protocol for location dependent messages, for example, queries that are injected by sinks. In this paper, we study the case where we have static sinks and mobile sensor nodes in the network. To provide up-to-date coverage areas to sinks, we focus on handling node mobility in the network. We discuss what is a better method for updating the routing structure (i.e., routing trees and coverage areas) to handle mobility efficiently: periodic global updates initiated from sinks or local updates triggered by mobile sensors. Simulation results show that local updating perform very well in terms of query delivery ratio. Local updating has a better scalability to increasing network size. It is also more energy efficient than ourpreviously proposed approach, where global updating in networks have medium mobility rate and speed