NDLI: Automatic abstraction and fault tolerance in cortical microachitectures

Content Provider	ACM Digital Library
Author	Hashmi, Atif Lipasti, Mikko Temam, Olivier Berry, Hugues
Abstract	Recent advances in the neuroscientific understanding of the brain are bringing about a tantalizing opportunity for building synthetic machines that perform computation in ways that differ radically from traditional Von Neumann machines. These brain-like architectures, which are premised on our understanding of how the human neocortex computes, are highly fault-tolerant, averaging results over large numbers of potentially faulty components, yet manage to solve very difficult problems more reliably than traditional algorithms. A key principle of operation for these architectures is that of automatic abstraction: independent features are extracted from highly disordered inputs and are used to create abstract invariant representations of the external entities. This feature extraction is applied hierarchically, leading to increasing levels of abstraction at higher levels in the hierarchy. This paper describes and evaluates a biologically plausible computational model for this process, and highlights the inherent fault tolerance of the biologically-inspired algorithm. We introduce a stuck-at fault model for such cortical networks, and describe how this model maps to hardware faults that can occur on commodity GPGPU cores used to realize the model in software. We show experimentally that the model software implementation can intrinsically preserve its functionality in the presence of faulty hardware, without requiring any reprogramming or recompilation. This model is a first step towards developing a comprehensive and biologically plausible understanding of the computational algorithms and microarchitecture of computing systems that mimic the human cortex, and to applying them to the robust implementation of tasks on future computing systems built of faulty components.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF MP4
ISSN	01635964
DOI	10.1145/2024723.2000066
Journal	ACM SIGARCH Computer Architecture News (CARN)
Volume Number	39
Issue Number	3
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1981-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Neuromorphic architectures Automatic abstraction Fault tolerance
Content Type	Audio Text
Resource Type	Article

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Automatic abstraction and fault tolerance in cortical microachitectures

Automatic Abstraction and Fault Tolerance in Cortical Microachitectures

Automatic abstraction and fault tolerance in cortical microachitectures

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