Tomas Tuma
IBM
51 Papers
315 Citations
Tomas Tuma is an academic researcher from IBM. The author has contributed to research in topics: Signal & Scanning probe microscopy. The author has an hindex of 16, co-authored 47 publications. Previous affiliations of Tomas Tuma include École Polytechnique Fédérale de Lausanne & GlobalFoundries.
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Papers
Stochastic phase-change neurons
Tomas Tuma,Angeliki Pantazi,Manuel Le Gallo,Manuel Le Gallo,Abu Sebastian,Evangelos Eleftheriou +5 more
TL;DR: This work shows that chalcogenide-based phase-change materials can be used to create an artificial neuron in which the membrane potential is represented by the phase configuration of the nanoscale phase- change device and shows that the temporal integration of postsynaptic potentials can be achieved on a nanosecond timescale.
1K
Neuromorphic computing with multi-memristive synapses
Irem Boybat,Irem Boybat,Manuel Le Gallo,S. R. Nandakumar,S. R. Nandakumar,Timoleon Moraitis,Thomas Parnell,Tomas Tuma,Bipin Rajendran,Yusuf Leblebici,Abu Sebastian,Evangelos Eleftheriou +11 more
TL;DR: A multi-memristive synaptic architecture with an efficient global counter-based arbitration scheme to address challenges associated with the non-ideal memristive device behavior is proposed.
Mixed-precision in-memory computing
Manuel Le Gallo,Manuel Le Gallo,Abu Sebastian,Roland Mathis,Matteo Manica,Matteo Manica,Heiner Giefers,Tomas Tuma,Costas Bekas,Alessandro Curioni,Evangelos Eleftheriou +10 more
- 01 Apr 2018
TL;DR: A hybrid system that combines a von Neumann machine with a computational memory unit can offer both the high precision of digital computing and the energy/areal efficiency of in-memory computing, which is illustrated by accurately solving a system of 5,000 equations using 998,752 phase-change memory devices.
Mixed-Precision In-Memory Computing
Manuel Le Gallo,Manuel Le Gallo,Abu Sebastian,Roland Mathis,Matteo Manica,Matteo Manica,Heiner Giefers,Tomas Tuma,Costas Bekas,Alessandro Curioni,Evangelos Eleftheriou +10 more
TL;DR: In this article, a mixed precision in-memory computing (MIMO) system is proposed, which combines a von Neumann machine with a computational memory unit. But it does not address the limitations arising from device variability and nonideal device characteristics.
295
High-speed multiresolution scanning probe microscopy based on Lissajous scan trajectories
TL;DR: A procedure for tuning the spatial and the temporal resolution of Lissajous trajectories is presented and experimental results obtained on a custom-built atomic force microscope (AFM) are shown.
170