IEEE Solid-State Circuits Magazine - Winter 2015 - 33

o
ot

k
oc

Sensors
Redundancy

Convergence
SNR Enhancement

Overcompleteness
Sparse Representation

Associative Memory
Pattern Storage/Retrieval

ph

ist

The Sensory Pathway: It Is All About Data Representations!

Hyper-Dimensional Representations
Representation is hyper-dimensional when the number of dimensions is "much" (> 1,000) larger than needed to cover space.
* Extremely Robust Against Most Failure Mechanisms and Noise
* Purely Statistical, Thrives on Randomness
* Support Full Algebra
V1 (Layer 1 of Visual Cortex) Is HIGHLY Overcomplete
× 104
Retinal Inputs
3

Number of Cells

2.5
2
1.5
1
0.5
0

[Barlow 1981]

0

100 200 300 400 500 600 700 800 900 1,000
Distance to the Cell

Distance Histogram for 1 Million Points in N-Dimensional Space (N = 1,000)

Brief Bio
Prof. Jan Rabaey is the founding director of the Berkeley Wireless Research
Center and the Ubiquitous Swarm Lab. He has been on the forefront of many
groundbreaking innovations in low-energy design, and is currently exploring
the interaction between information technology and neuroscience.

-Jan M. Rabaey
Donald O. Pederson
Distinguished Professor
University of California at Berkeley

Events in Canada and Japan Form Finish Line of Marathon
2014 DL Tour Program

I

In an 11th-hour flourish, the IEEE SolidState Circuits Society (SSCS) 2014 Distinguished Lecturer (DL) tour program
Digital Object Identifier 10.1109/MSSC.2014.2369339
Date of publication: 11 February 2015

ended with five events in November
in Toronto, Montreal, and Ottawa,
Canada, and Kyoto and Tokyo, Japan.
Three more visits planned for Bandung, Jakarta, and Yoyakarta, Indonesia
were cancelled due to illness. The five

technical seminars that were held in
November complemented five earlier
programs in July and October at SSCSChengdu and Macau, China, and Lehigh Valley, Pennsylvania, Princeton-
Central Jersey and New York.

IEEE SOLID-STATE CIRCUITS MAGAZINE

W i n t e r 2 0 15

33



Table of Contents for the Digital Edition of IEEE Solid-State Circuits Magazine - Winter 2015

IEEE Solid-State Circuits Magazine - Winter 2015 - Cover1
IEEE Solid-State Circuits Magazine - Winter 2015 - Cover2
IEEE Solid-State Circuits Magazine - Winter 2015 - 1
IEEE Solid-State Circuits Magazine - Winter 2015 - 2
IEEE Solid-State Circuits Magazine - Winter 2015 - 3
IEEE Solid-State Circuits Magazine - Winter 2015 - 4
IEEE Solid-State Circuits Magazine - Winter 2015 - 5
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IEEE Solid-State Circuits Magazine - Winter 2015 - 33
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IEEE Solid-State Circuits Magazine - Winter 2015 - 39
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IEEE Solid-State Circuits Magazine - Winter 2015 - 43
IEEE Solid-State Circuits Magazine - Winter 2015 - 44
IEEE Solid-State Circuits Magazine - Winter 2015 - 45
IEEE Solid-State Circuits Magazine - Winter 2015 - 46
IEEE Solid-State Circuits Magazine - Winter 2015 - 47
IEEE Solid-State Circuits Magazine - Winter 2015 - 48
IEEE Solid-State Circuits Magazine - Winter 2015 - Cover3
IEEE Solid-State Circuits Magazine - Winter 2015 - Cover4
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2019
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2019
https://www.nxtbook.com/nxtbooks/ieee/mssc_2019summer
https://www.nxtbook.com/nxtbooks/ieee/mssc_2019winter
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018fall
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018summer
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018spring
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018winter
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2017
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https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2014
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2014
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2014
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