Author: SRI International
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Observations of D-Region Structure and Atmospheric Tides with PFISR During Active Aurora
We report on combined spectral measurements of the D-region ionosphere and the polar summer mesosphere and lower thermosphere performed on 9 June 2007 with the 450 MHz Poker Flat Incoherent Scatter Radar (PFISR) under active auroral conditions.
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Pfisr Observations of Strong Azimuthal Flow Bursts in the Ionosphere and Their Relation to Nightside Aurora
We present two flow burst events observed by the new Poker Flat Advanced Modular Incoherent Scatter Radar (PFISR) in the pre-midnight auroral zone on 28 April 2007, one towards the west and the other towards the east.
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Weapon Identification Using Hierarchical Classification of Acoustic Signatures
We apply a unique hierarchical audio classification technique to weapon identification using gunshot analysis.
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Innovative Wave Power Generation System Using Electroactive Polymer Artificial Muscles
This article presents a discussion on one energy harvesting method that has been the focus of attention recently: the generation system based on electroactive polymer artificial muscle (EPAM).
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Efficient Duration and Hierarchical Modeling for Human Activity Recognition
In this paper, we argue that in dealing with ADLs, it is beneficial to exploit both their typical duration patterns and inherent hierarchical structures.
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Poker Flat Radar Observations of the Magnetosphere-Ionosphere Coupling Electrodynamics of the Earthward Penetrating Plasma Sheet Following Convection Enhancements
We have used PFISR observations associated with two relatively abrupt southward turnings of the IMF to provide an initial evaluation of aspects of this response.
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Postural Sway Reduction in Aging Men and Women: Relation to Brain Structure, Cognitive Status, and Stabilizing Factors
This quantitative physiological and MRI study of sex differences across the adult age range examined the association between components of postural control and the integrity of brain structure and function under different conditions of sensory input and stance stabilization manipulation.
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Seasonal and Diurnal Variability of the Meteor Flux at High Latitudes Observed Using PFISR
Latitudinal and seasonal variability of the micrometeor input function: A study using model predictions and observations from Arecibo and PFISR.
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Inside events in progress
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Signpost from the masses: learning effects in an exploratory social tag search browser
In this paper, we present the design of a tag-based exploratory system and detail an experiment in understanding its effectiveness.
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Remembrance of things tagged: How tagging effort affects tag production and human memory
We developed a low-effort interaction method called Click2Tag for social bookmarking. Information foraging theory predicts that the production of tags in will increase as the effort required to do so is lowered, while the amount of time invested decreases.
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Annotate once, appear anywhere: collective foraging for snippets of interest using paragraph fingerprinting
In this paper we report how we explore the idea of paragraph fingerprinting to achieve the goal of annotate once, appear anywhere in a social annotation system called SparTag.us.