Search Results for author: Timothy Verstynen

Found 9 papers, 5 papers with code

Rethinking the external globus pallidus and information flow in cortico-basal ganglia-thalamic circuits

no code implementations21 Dec 2023 Cristina Giossi, Jonathan E. Rubin, Aryn Gittis, Timothy Verstynen, Catalina Vich

Taken together, this new evidence points to the GPe as being a central hub in the CBGT circuit, participating in bidirectional information flow and linking multifaceted control signals to regulate behavior.

A critical reappraisal of predicting suicidal ideation using fMRI

1 code implementation10 Mar 2021 Timothy Verstynen, Konrad Kording

For many psychiatric disorders, neuroimaging offers a potential for revolutionizing diagnosis, and potentially treatment, by providing access to preverbal mental processes.

BIG-bench Machine Learning

Better Safe than Sorry: Evidence Accumulation Allows for Safe Reinforcement Learning

1 code implementation24 Sep 2018 Akshat Agarwal, Abhinau Kumar V, Kyle Dunovan, Erik Peterson, Timothy Verstynen, Katia Sycara

The agent makes no decision by default, and the burden of proof to make a decision falls on the policy to accrue evidence strongly in favor of a single decision.

Decision Making reinforcement-learning +2

Combining imagination and heuristics to learn strategies that generalize

1 code implementation10 Sep 2018 Erik J Peterson, Necati Alp Müyesser, Timothy Verstynen, Kyle Dunovan

Deep reinforcement learning can match or exceed human performance in stable contexts, but with minor changes to the environment artificial networks, unlike humans, often cannot adapt.

Hierarchical Reinforcement Learning Position +2

Local White Matter Architecture Defines Functional Brain Dynamics

no code implementations22 Apr 2018 Yo Joong Choe, Sivaraman Balakrishnan, Aarti Singh, Jean M. Vettel, Timothy Verstynen

If communication efficiency is fundamentally constrained by the integrity along the entire length of a white matter bundle, then variability in the functional dynamics of brain networks should be associated with variability in the local connectome.

Variable Selection

Learning model-based strategies in simple environments with hierarchical q-networks

1 code implementation20 Jan 2018 Necati Alp Muyesser, Kyle Dunovan, Timothy Verstynen

Recent advances in deep learning have allowed artificial agents to rival human-level performance on a wide range of complex tasks; however, the ability of these networks to learn generalizable strategies remains a pressing challenge.

Reinforcement Learning (RL)

FuSSO: Functional Shrinkage and Selection Operator

no code implementations10 Nov 2013 Junier B. Oliva, Barnabas Poczos, Timothy Verstynen, Aarti Singh, Jeff Schneider, Fang-Cheng Yeh, Wen-Yih Tseng

We present the FuSSO, a functional analogue to the LASSO, that efficiently finds a sparse set of functional input covariates to regress a real-valued response against.

DeBaCl: A Python Package for Interactive DEnsity-BAsed CLustering

1 code implementation30 Jul 2013 Brian P. Kent, Alessandro Rinaldo, Timothy Verstynen

The package is intended to promote the practical use of level set trees through improvements in computational efficiency and a high degree of user customization.

Clustering Computational Efficiency

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