Sensing, Tracking, and Reasoning with Relations

Abstract Suppose we have a set of sensor nodes spread over a geographical area. Assume that these nodes are able to perform processing as well as sensing and are additionally capable of communicating with each other by means of a wireless network. Though each node is an independent hardware device, they need to coordinate their [...]


Landscape Trajectory Analysis: Spatio-temporal Dynamics from Image Time

Abstract Landscape dynamics can be revealed through analysis of image times series. The temporal development of spatial patterns holds significant information about ecosystem processes. Yet, the tools for the characterization of spatio-temporal structure are few. We describe some of the challenges facing spatio-temporal analysis and demonstrate a method for identifying and measuring pattern in image [...]


Biomonitoring of Industrial Pollutants: Health and Policy Implications of the Chemical Body Burden

Abstract General discussion of the consequences of industrial production of synthetic chemicals on the human body. Coinage of the term “body burden” on the individual and collective levels. Implications for health policy and education for citizens. Comments General discussion of the consequences of industrial use of chemicals on the human body. Historical data discussed and [...]


Collective Memory and Spatial Sorting in Animal Groups

Abstract We present a self-organizing model of group formation in three-dimensional space, and use it to investigate the spatial dynamics of animal groups such as fish schools and bird flocks. We reveal the existence of major group-level behavioural transitions related to minor changes in individual-level interactions. Further, we present the first evidence for collective memory [...]


Location Sensing and Privacy in a Context-Aware Computing Environment

Abstract This article presents and evaluates the performance of a location sensing algorithm developed and demonstrated at Carnegie Mellon University. We compare our model with various others based on different architectures and software paradigms. We show comparative results in accuracy, the complexity of training, total power consumption, and suitability to users. Our method reduces training [...]