ANC Workshop - 04/02/2020

Chair

David Sterratt

Speaker 1

James Ritchie

Title

 Density Estimation with Noisy Data

Abstract

The Gaia space observatory aims to produce a precise 3D map of our galaxy using noisy observations of approximately 1 billion astronomical objects. Such a catalogue is an example of a dataset where we know the individual statistics of the noise applied to each data point, and we would like to fit a probability density to the underlying noise-free data for use in making scientific inferences. I will talk about an existing method to do this noisy data density estimation using Gaussian mixture models, some recent work we have done to help scale this method up to very large datasets like the Gaia catalogue, and some planned approaches making use of normalising flows to improve on this baseline.

 

Speaker 2

Richard Shillcock

Title

Synchrony and asynchrony of the two eyes in binocular fixations in the reading of English and Chinese; the implications for ocular prevalence  

Abstract

We explore low-level, behavioural universals in reading, across English and Chinese. We investigated binocular coordination in terms of the small non-alignments between the two eyes’ fixations in time. We define a typology of nine such asynchronies and report the different spatial distributions of these types across the screen of text. We interpret them in terms of their implications for ocular prevalence—the prioritizing of the input from one eye over the input from the other eye in higher perception/cognition, after binocular fusion. The results show striking similarities of binocular reading behaviours across the two very different orthographies. Asynchronies in which one eye begins the fixation earlier and/or ends it later occur most frequently in the hemifield corresponding to that eye. We propose that such small asynchronies in binocular fixations prioritize the higher processing of the input from that eye, after binocular fusion.

 

 

Feb 04 2020 -

ANC Workshop - 04/02/2020

Beren Millidge, James Ritchie

G.03, IF