Publications by William Christopher Evans

Environmental Field Estimation with Hybrid-Mobility Sensor Networks

Alcherio Martinoli, Steven Adriaan Roelofsen, William Christopher Evans, Duarte Da Cruz Baptista Dias

The remarkable accessibility of modern flying robots makes them an attractive platform for environmental sensing. However, low cost and ease of use are currently incompatible with large payloads, severely limiting the choice of sensor and ultimately modali ...

Ieee2016

A Distributed Intelligent Sensing Approach for Environmental Monitoring Applications

William Christopher Evans

Scientific reports from around the world present us with the undeniable fact that the global ecosystem is undergoing severe change. As this shift accelerates, it is ever more critical that we are able to quantify the local effects of such changes, and furt ...

EPFL2015

Top-Down vs Bottom-Up Model-Based Methodologies for Distributed Control: A Comparative Experimental Study

Alcherio Martinoli, Grégory Mermoud, William Christopher Evans, Utkarsh Upadhyay

Model-based synthesis of distributed controllers for multi-robot systems is commonly approached in either a top-down or bottom-up fashion. In this paper, we investigate the experimental challenges of both approaches, with a special emphasis on resource-con ...

Springer-Verlag2014

Environmental Sensing using Land-based Spectrally-selective Cameras and a Quadcopter

Alcherio Martinoli, Michael Minnig, William Christopher Evans, Alexander Bahr

2013

Distributed spatiotemporal suppression for environmental data collection in real-world sensor networks

Alcherio Martinoli, William Christopher Evans, Alexander Bahr

Environmental processes are often severely over-sampled. As sensor networks become more ubiquitous for this purpose, increasing network longevity becomes ever more important. Radio transceivers in particular are a great source of energy consumption, and ma ...

Ieee Computer Soc2013

Evaluating Efficient Data Collection Algorithms for Environmental Sensor Networks

Alcherio Martinoli, William Christopher Evans, Alexander Bahr

Although there exists a large body of work on efficient data collection in sensor networks, the vast majority of proposed techniques have not been implemented on real networks or thoroughly studied on real data. As algorithm performance is highly dependent ...

Springer-Verlag Berlin2013

Measuring Sensible Heat Flux with High Spatial Density

Alcherio Martinoli, Marc Parlange, Wolf Hendrik Huwald, Chad Higgins, William Christopher Evans, Alexander Bahr

2012

An Adaptive Field Estimation Algorithm for Sensor Networks in Dynamic Environments

Alcherio Martinoli, Amanda Stella Markowska Prorok, William Christopher Evans

The efficiency of distributed sensor networks depends on an optimal trade-off between the usage of resources and data quality. This workshop paper addresses the problem of optimizing this trade-off in self-configured distributed sensor networks. In our cas ...

2011

Comparing and modeling distributed control strategies for miniature self-assembling robots

Alcherio Martinoli, Grégory Mermoud, William Christopher Evans

We propose two contrasting approaches to the scalable distributed control of a swarm of self-assembling miniaturized robots, specifically the formation of chains of a desired length: (1) a deterministic controller in which robots communicate with each othe ...

IEEE2010

Aggregation-mediated Collective Perception and Action in a Group of Miniature Robots

Alcherio Martinoli, Grégory Mermoud, William Christopher Evans

We introduce a novel case study in which a group of miniaturized robots screen an environment for undesirable cells, and destroy them. Because miniaturized robots are usually endowed with reactive controllers and minimalist sensing and actuation capabiliti ...

2010

TEM cell testing of cable noise reduction techniques from 2 MHz to 200 MHz - Part 1

William Christopher Evans

This paper presents empirical results of cable noise reduction techniques as demonstrated in a TEM cell operating with radiated fields from 2 - 200 MHz. It is the first part of a two-paper series. This first paper discusses cable types and shield connectio ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008