Since energy is scarce in sensor nodes, wireless sensor networks aim to transmit as few packets as possible. To achieve this goal, sensor protocols often aggregate measured data from multiple sensor nodes into a single packet. In this paper, a survey of aggregation techniques and methods is given. Based on this survey, it is concluded that there are currently several dependencies between the ag...

We describe the design and implementation of system architecture to support object introspection in C++. In this system, information is collected by parsing class declarations, and is used to build a supporting environment for object introspection. Our approach is non-intrusive because it requires no changes in the original class declarations and libraries; hence, binary compatibility between o...

The vast amount of information presented in museums is often overwhelming to a visitor, making it difficult to select personally interesting exhibits. Advances in mobile computing and user modelling have made possible technology that can assist a visitor in this selection process. Such a technology can (1) utilise non-intrusive observations of a visitor’s behaviour in the physical space to lear...

Monte Carlo-generalized Polynomial Chaos (MC-gPC) has already been thoroughly studied in the literature. MC-gPC both builds a gPC based reduced model of partial differential equation (PDE) interest and solves it with an intrusive MC scheme order to propagate uncertainties. This captures behavior solution set PDEs subject some uncertain parameters modeled by random variables. is method, needs mo...

A new experimental technique to measure crater growth is presented whereby a high speed video captures profiles of a crater forming after impact obtained using a vertical laser sheet centered on the impact point. Unlike previous so called “quarter-space experiments”, where projectiles were launched along a transparent Plexiglas sheet so that growth of half a crater could be viewed, the use of t...

High-integrity embedded systems operate in multiple modes, in order to ensure system availability in the face of faults. Unanticipated state-dependent faults that remain in software after system design and development behave like hardware transient faults: they appear, do the damage and disappear. The conventional approach used for handling task overruns caused by transient faults is to use a s...

The Navy’s Integrated Condition Assessment System (ICAS) is continuously evolving to meet the needs of today’s fleet as well as the requirements of future ship designs. This paper describes a technology known as the non-intrusive load monitor that could support the evolution of ICAS and other condition-based maintenance (CBM) systems. The non-intrusive load monitor (NILM) [8, 9, 10] can be used...

In recent years, exercise games have been criticized for not being able to engage their players into levels of physical activity that are high enough to yield health benefits. A major challenge in the design of exergames, however, is that it is difficult to assess the amount of physical activity an exergame yields due to limitations of existing techniques to assess energy expenditure of exergam...

This article presents a new approach to the non-intrusive quality estimation of transmitted speech. Traditional estimation methods exhibit limitations to providing diagnostic information and for practical monitoring purposes. The new approach merges solutions to overcome the existing limitations and intends to provide a new user-friendly estimator. We present an overview and the planned structu...

Given a parameterized n-dimensional SQL query template and a choice of query optimizer, a plan diagram is a color-coded pictorial enumeration of the execution plan choices of the optimizer over the query parameter space. Similarly, we can define cost diagram and cardinality diagram as the pictorial enumerations of cost and cardinality estimations of the optimizer over the same space. These thre...