Calendar of Events

Friday, February 11 2022

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Friday, February 11, 2022 - 4:00pm
Description

Journal Club Video Archive

Journal Club is a group that meets bi-weekly to listen to and present summaries of exciting and insightful research papers. You can present any paper you’d like, any meeting week you’d like! Check out the start-up notice with more details regarding the club mission and expectations.

Presenter: Jack Postlewaite

Title: The Overfitted Brain: Dreams Evolved to Assist Generalization  (E. Hoel 2021)

Abstract: Dreaming remains a mystery to neuroscience. While various hypotheses of why brains evolved nightly dreaming have been put forward, many of these are contradicted by the sparse, hallucinatory, and narrative nature of dreams, a nature that seems to lack any particular function. Recently, research on artificial neural networks has shown that during learning, such networks face a ubiquitous problem: that of overfitting to a particular dataset, which leads to failures in generalization and therefore performance on novel datasets. Notably, the techniques that researchers employ to rescue overfitted artificial neural networks generally involve sampling from an out-of-distribution or randomized dataset. The overfitted brain hypothesis is that the brains of organisms similarly face the challenge of fitting too well to their daily distribution of stimuli, causing overfitting and poor generalization. By hallucinating out-of-distribution sensory stimulation every night, the brain is able to rescue the generalizability of its perceptual and cognitive abilities and increase task performance.

Presenter: Ruby Abrams

Title: Soliton Solutions of the KP-1 Equation 

Abstract: The KP equation is a 2D generalization of the KdV that models long ion-acoustic waves that undergo perturbations from the transverse direction. In this presentation, I present solutions arising through the method of Gramian forms. This method classifies solutions through two parameters: a complex wave number that determines amplitude, velocity, and oscillation of a lump and the depth of the generalized Schur polynomial (giving rise to line solitons and more complex shapes and interactions).