For the last decade, we have developed a bioinspired control architecture for the autonomous navigation of mobile robots. The robot is able to learn to reproduce a homing or a route following behavior by interacting with a human teacher. However, the system strongly relies on the estimation of the orientation provided by a magnetic compass. We propose in this paper a model of visual compass in ...

This paper deals with the design and implementation of a simple HMC6352 2-axis digital compass. Most compasses have been of the analogue type with magnetic needles as pointers. Replacing the “old” magnetic needle compass or the gyrocompass by an electronic solution offers advantages like having a solid-state component without moving parts and the ease of interfacing with other electronic system...

BACKGROUND Few researchers have the data required to adequately understand how the school environment impacts youth health behaviour development over time. METHODS/DESIGN COMPASS is a prospective cohort study designed to annually collect hierarchical longitudinal data from a sample of 90 secondary schools and the 50,000+ grade 9 to 12 students attending those schools. COMPASS uses a rigorous ...

Continuous glucose monitoring (CGM) devices are being increasingly used to monitor glycemia in people with diabetes. One advantage with CGM is the ability to monitor the trend of sensor glucose (SG) over time. However, there are few metrics available for assessing the trend accuracy of CGM devices. The aim of this study was to develop an easy to interpret tool for assessing trend accuracy of CG...

Previous studies on European robins, Erithacus rubecula, and Australian silvereyes, Zosterops lateralis, had suggested that magnetic compass information is being processed only in the right eye and left brain hemisphere of migratory birds. However, recently it was demonstrated that both garden warblers, Sylvia borin, and European robins have a magnetic compass in both eyes. These results raise ...

In this contribution we analyse the possible nonuniqueness in the least-squares solution of the GNSS carrier-phase compass model. It is shown that this lack of uniqueness may manifest itself in the fixed baseline estimator and therefore in the GNSS compass readings. We present the conditions under which nonuniqueness occurs and give explicit expressions for these nonunique least-squares solutions.

During the last decade, overlay networks based on distributed hash tables have become the de facto standard for data management in Peerto-Peer (P2P) systems, with Chord being its most prominent representative. Essentially, with its fully decentralized approach, Chord avoids any bottleneck and single point of failure while guaranteeing data to be retrieved in O(logN) hops in a network consisting...

Compass is the maintenance quality assurance program developed and implemented statewide by the Wisconsin Department of Transportation (WisDOT) since 2002. This program provides a comprehensive overview of highway operations conditions based on analysis of data from field reviews, condition surveys, and expenditures. Compass reports are tools to visualize and communicate trends and conditions, ...

This paper reports on the Design Compass, a classroom tool for helping students record and reflect on their design process as they work on and complete a design challenge. The Design Compass software provides an interface where students can identify and record the various design steps they used while performing them, and add digital notes and pictures to document their work. In the Design Log v...

Atomic spectroscopy can provide valuable information about fusion plasma. This is possible due to the fact that properties of radiated photons are governed by ion and electron velocity distributions and densities, electromagnetic fi elds, and ion species present in a plasma. Specifi cally, it can be used to calculate ion temperature and ion fl ow along magnetic fl ux surfaces in tokamaks called...