Search Results for author: James Bell

Found 10 papers, 3 papers with code

The global economic impact of AI technologies in the fight against financial crime

no code implementations27 Feb 2023 James Bell

Is the rapid adoption of Artificial Intelligence a sign that creative destruction (a capitalist innovation process first theorised in 1942) is occurring?

Ethics

Reinforcement Learning in Newcomblike Environments

no code implementations NeurIPS 2021 James Bell, Linda Linsefors, Caspar Oesterheld, Joar Skalse

This gives us a powerful tool for reasoning about the limit behaviour of agents -- for example, it lets us show that there are Newcomblike environments in which a reinforcement learning agent cannot converge to any optimal policy.

reinforcement-learning Reinforcement Learning (RL)

MPC-Friendly Commitments for Publicly Verifiable Covert Security

no code implementations15 Sep 2021 Nitin Agrawal, James Bell, Adrià Gascón, Matt J. Kusner

We address the problem of efficiently verifying a commitment in a two-party computation.

Integrating Novelty Detection Capabilities with MSL Mastcam Operations to Enhance Data Analysis

no code implementations23 Mar 2021 Paul Horton, Hannah R. Kerner, Samantha Jacob, Ernest Cisneros, Kiri L. Wagstaff, James Bell

We address this need by creating products for MSLWEB that use novelty detection to help operations staff identify unusual data that might be diagnostic of new or atypical compositions or mineralogies detected within an imaging scene.

Novelty Detection

Beyond COVID-19: Network science and sustainable exit strategies

no code implementations27 Sep 2020 James Bell, Ginestra Bianconi, David Butler, Jon Crowcroft, Paul C. W Davies, Chris Hicks, Hyunju Kim, Istvan Z. Kiss, Francesco Di Lauro, Carsten Maple, Ayan Paul, Mikhail Prokopenko, Philip Tee, Sara I. Walker

On May $28^{th}$ and $29^{th}$, a two day workshop was held virtually, facilitated by the Beyond Center at ASU and Moogsoft Inc.

Physics and Society

Differentially Private Health Tokens for Estimating COVID-19 Risk

1 code implementation25 Jun 2020 David Butler, Chris Hicks, James Bell, Carsten Maple, Jon Crowcroft

Our experimental results show that for groups of size 500 or more, the error associated with our method can be as low as 0. 03 on average and thus the aggregated results can be useful in a number of identity-free contexts.

Cryptography and Security Computers and Society

Private Protocols for U-Statistics in the Local Model and Beyond

no code implementations9 Oct 2019 James Bell, Aurélien Bellet, Adrià Gascón, tejas kulkarni

In this paper, we study the problem of computing $U$-statistics of degree $2$, i. e., quantities that come in the form of averages over pairs of data points, in the local model of differential privacy (LDP).

Clustering Metric Learning

Differentially Private Summation with Multi-Message Shuffling

1 code implementation20 Jun 2019 Borja Balle, James Bell, Adria Gascon, Kobbi Nissim

In recent work, Cheu et al. (Eurocrypt 2019) proposed a protocol for $n$-party real summation in the shuffle model of differential privacy with $O_{\epsilon, \delta}(1)$ error and $\Theta(\epsilon\sqrt{n})$ one-bit messages per party.

The Privacy Blanket of the Shuffle Model

1 code implementation7 Mar 2019 Borja Balle, James Bell, Adria Gascon, Kobbi Nissim

Additionally, Erlingsson et al. (SODA 2019) provide a privacy amplification bound quantifying the level of curator differential privacy achieved by the shuffle model in terms of the local differential privacy of the randomizer used by each user.

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