B4W: A Smart Wireless Intruder Detection System

Surveillance and monitoring are highly critical in many application scenarios like wildlife conservation, restricted areas such as nuclear spillover, and border security. Moreover, in these scenarios, intrusions do not happen frequently thus, conventional surveillance is overkill and expensive that also requires extensive human involvement which...

Know when to listen: SDN-based protocols for directed IoT networks

Low-power wireless networks are an integral part of the Internet of Things, composed of resource-constrained devices harvesting ambient information.<br/>The appearance of unidirectional links is characteristic of low power wireless networking due to physical effects, device heterogeneity and manufacturing imperfections.<br/>Despite the...

Distributed Convex Optimization: Based on Monotone Operator Theory

Following their conception in the mid twentieth century, the world of computers has evolved from a landscape of isolated entities into a sprawling web of interconnected machines. Yet, given this evolution, many of the methods we use for allowing computers to work together still reflect their inherently isolated origins with the aggregation of...

Development of a Light-Tracking and-Redirecting System Actuated by Hand-Gesture Recognition

This paper presents a context-Aware light-Tracking and-redirecting system guided by hand-gesture recognition. It is conceived as yet another mechanism within an ongoing development of a more intuitive and technically sophisticated Ambient Intelligence / Active and Assisted Living ecosystem. The detailed system consists of individual nodes...

No way back? An SDN protocol for directed IoT networks

The Internet of Things (IoT) has and will continue to permeate many aspects of everyday life. However, IoT de- vices often use wireless communication to transfer their data, which may experience ambient noise and multipath fading. This, together with the wide heterogeneity in types of devices, leads to the emergence of unidirectional links in...

On a tandem queue with batch service and its applications in wireless sensor networks

We present a tandem network of queues 0 , ⋯ , s- 1. Customers arrive at queue 0 according to a Poisson process with rate λ. There are s independent batch service processes at exponential rates μ₀, ⋯ , μ_s _- ₁. Service process i, i= 0 , ⋯ , s- 1 , at rate μ_i is such that all customers of...

An Extended Ambient Intelligence Implementation for Enhanced Human-Space Interaction

This paper proposes an extended Ambient Intelligence (AmI) solution that expresses intelligence with respect to both Information and Communications Technologies (ICTs) and spatial reconfiguration in the built-environment. With respect to the former, a solution based on a decentralized yet unified Wireless Sensor Network (WSN) is proposed. This...

Synchronization of Wireless Sensor Networks

Wireless sensor networks of the type discussed in this MSc project play a crucial role in many envisionings of the Internet of Things, a trend that is thought to play a major role in the technological innovations of the near future. These wireless, ad-hoc, scalable mesh networks provide the infrastructure for numerous sensing and control...

A Genetic Approach to Programming Large-Scale Systems

In recent years, there is an increasing interest in the scientific community for development of algorithms targeting large-scale networks. In addition to their sheer size, these networks also exhibit various topology dynamics -- nodes join and exit at high rates (churn), are mobile and are not always reliable. Such extreme properties make...

Do we really need A Priori Link Quality Estimation?

Traditionally, link quality estimation (LQE) has been viewed as an a priori step in sensor network routing protocols because it filters out unreliable links before data transmission. Recent results, however, show that protocols can perform well without a priori LQE. Because getting rid of LQE seems rather counter-intuitive, the aim of this work...

Mobility-based Time References for Wireless Sensor Networks

Wireless Sensor Networks require small low-cost radios to enable communication among its nodes. Since those radios must be fully integrated to reduce cost and size, integration is required also for their on-board time references, which are needed to achieve synchronization with the other nodes. To deal with the lower accuracy of integrated...

Feasibility Study and Design for Wireless Sensor Networks in a Space Environment

Wireless sensor networks is a technology that has been used in a vast number of applications and environments with successful results in the past. Therefore increasing nowadays the number of users of this type of devices and their new applications. In this thesis we worked hand-in-hand with the ISIS B.V. Company to provide a proper WSN design to...

Reliable Transport for Wireless Sensor Networks

Wireless sensor networks (WSNs) are ad-hoc wireless networks of small form-factor embedded nodes with limited memory, processing, and energy resources. Certain applications, like security and art monitoring,require reliable data transport. Current work for WSNs only provides stochastic reliability or guaranteed reliability for bulk transfer....

A Java Compatible Virtual Machine for Wireless Sensor Networks

Writing software for Wireless Sensor Networks (WSN) is hard, as programmers have to write robust, distributed, highly concurrent applications on extremely resource limited devices. Virtual machines offer among other things support for high-level object-oriented languages, dynamic memory management and protection, hardware abstraction, and...

Passive and Active Inspection of Wireless Sensor Networks: A Practical Use Evaluation

Sensor nodes are small, autonomous, battery-powered devices that use a wireless network interface to communicate with other sensor nodes. Together these sensor nodes form a Wireless Sensor Network (WSN), which has the purpose to sense information about the environment. Before a WSN is deployed, it is tested using simulators and testbeds. Both...