Publications
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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…
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Assessing Auroral Electric Field Variance with Coherent and Incoherent Scatter Radar
Line-of-sight F region plasma drifts measured with the Poker Flat Incoherent Scatter Radar (PFISR) during the NASA JOULE II experiment period are compared with estimates derived from E region coherent scatter spectra observed with a 30 MHz imaging radar on common…
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Volumetric Imaging of the Auroral Ionosphere: Initial Results from PFISR
This paper demonstrates the capabilities of PFISR for producing three-dimensional volumetric images of E-region ionization patterns produced by the aurora.
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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…
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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.
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Using temporal patterns (T-Patterns) to derive stress factors of routine tasks
We describe the use of a statistical technique called T-pattern analysis to derive and characterize the routineness of tasks.
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With a little help from my friends: examining the impact of social annotations in sensemaking tasks
This paper presents a laboratory study aimed at evaluating the learning effect of social features in SparTag.us.
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What’s in Wikipedia? mapping topics and conflict using socially annotated category structure
In this paper we develop measures to map Wikipedia using its socially annotated, hierarchical category structure.
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Predicting shoppers’ interest from social interactions using sociometric sensors
In this paper, we explore using sociometric data to study social behaviors of group shoppers.
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Using temporal patterns (T-Patterns) to derive stress factors of routine tasks
We describe the use of a statistical technique called T-pattern analysis to derive and characterize the routineness of tasks.