Search Results for author: Novi Quadrianto

Found 30 papers, 10 papers with code

Are Compressed Language Models Less Subgroup Robust?

1 code implementation26 Mar 2024 Leonidas Gee, Andrea Zugarini, Novi Quadrianto

To reduce the inference cost of large language models, model compression is increasingly used to create smaller scalable models.

Model Compression

Addressing Membership Inference Attack in Federated Learning with Model Compression

1 code implementation29 Nov 2023 Gergely Dániel Németh, Miguel Ángel Lozano, Novi Quadrianto, Nuria Oliver

In this paper, we show that the effectiveness of these attacks on the clients negatively correlates with the size of the client datasets and model complexity.

Federated Learning Inference Attack +3

Uncertainty in Fairness Assessment: Maintaining Stable Conclusions Despite Fluctuations

no code implementations2 Feb 2023 Ainhize Barrainkua, Paula Gordaliza, Jose A. Lozano, Novi Quadrianto

Several recent works encourage the use of a Bayesian framework when assessing performance and fairness metrics of a classification algorithm in a supervised setting.

Fairness Informativeness

A Survey on Preserving Fairness Guarantees in Changing Environments

no code implementations14 Nov 2022 Ainhize Barrainkua, Paula Gordaliza, Jose A. Lozano, Novi Quadrianto

Human lives are increasingly being affected by the outcomes of automated decision-making systems and it is essential for the latter to be, not only accurate, but also fair.

Benchmarking Decision Making +1

Okapi: Generalising Better by Making Statistical Matches Match

1 code implementation7 Nov 2022 Myles Bartlett, Sara Romiti, Viktoriia Sharmanska, Novi Quadrianto

In order to perform the online matching in a runtime- and memory-efficient way, we draw upon the self-supervised literature and combine a memory bank with a slow-moving momentum encoder.

Benchmarking Binary Classification +1

RealPatch: A Statistical Matching Framework for Model Patching with Real Samples

1 code implementation3 Aug 2022 Sara Romiti, Christopher Inskip, Viktoriia Sharmanska, Novi Quadrianto

We demonstrate the effectiveness of RealPatch on three benchmark datasets, CelebA, Waterbirds and a subset of iWildCam, showing improvements in worst-case subgroup performance and in subgroup performance gap in binary classification.

Binary Classification Data Augmentation

Addressing Missing Sources with Adversarial Support-Matching

1 code implementation24 Mar 2022 Thomas Kehrenberg, Myles Bartlett, Viktoriia Sharmanska, Novi Quadrianto

We investigate a scenario in which the absence of certain data is linked to the second level of a two-level hierarchy in the data.

Fairness

Zero-shot Fairness with Invisible Demographics

no code implementations1 Jan 2021 Thomas Kehrenberg, Viktoriia Sharmanska, Myles Scott Bartlett, Novi Quadrianto

In a statistical notion of algorithmic fairness, we partition individuals into groups based on some key demographic factors such as race and gender, and require that some statistics of a classifier be approximately equalized across those groups.

Disentanglement Fairness

Contrastive Examples for Addressing the Tyranny of the Majority

no code implementations14 Apr 2020 Viktoriia Sharmanska, Lisa Anne Hendricks, Trevor Darrell, Novi Quadrianto

Computer vision algorithms, e. g. for face recognition, favour groups of individuals that are better represented in the training data.

Face Recognition

Causal datasheet: An approximate guide to practically assess Bayesian networks in the real world

no code implementations12 Mar 2020 Bradley Butcher, Vincent S. Huang, Jeremy Reffin, Sema K. Sgaier, Grace Charles, Novi Quadrianto

Here we propose a causal extension to the datasheet concept proposed by Gebru et al (2018) to include approximate BN performance expectations for any given dataset.

Low-variance Black-box Gradient Estimates for the Plackett-Luce Distribution

1 code implementation22 Nov 2019 Artyom Gadetsky, Kirill Struminsky, Christopher Robinson, Novi Quadrianto, Dmitry Vetrov

Learning models with discrete latent variables using stochastic gradient descent remains a challenge due to the high variance of gradient estimates.

Discovering Fair Representations in the Data Domain

1 code implementation CVPR 2019 Novi Quadrianto, Viktoriia Sharmanska, Oliver Thomas

On face images of the recent DiF dataset, with the same gender attribute, our method adjusts nose regions.

Attribute Fairness +1

Tuning Fairness by Balancing Target Labels

1 code implementation12 Oct 2018 Thomas Kehrenberg, Zexun Chen, Novi Quadrianto

The issue of fairness in machine learning models has recently attracted a lot of attention as ensuring it will ensure continued confidence of the general public in the deployment of machine learning systems.

BIG-bench Machine Learning Fairness

Recycling Privileged Learning and Distribution Matching for Fairness

no code implementations NeurIPS 2017 Novi Quadrianto, Viktoriia Sharmanska

We set an overarching goal to develop a unified machine learning framework that is able to handle any definitions of fairness, their combinations, and also new definitions that might be stipulated in the future.

BIG-bench Machine Learning Fairness

Gray-box inference for structured Gaussian process models

no code implementations14 Sep 2016 Pietro Galliani, Amir Dezfouli, Edwin V. Bonilla, Novi Quadrianto

We develop an automated variational inference method for Bayesian structured prediction problems with Gaussian process (GP) priors and linear-chain likelihoods.

Stochastic Optimization Structured Prediction +1

Learning to Transfer Privileged Information

no code implementations1 Oct 2014 Viktoriia Sharmanska, Novi Quadrianto, Christoph H. Lampert

We interpret these methods as learning easiness and hardness of the objects in the privileged space and then transferring this knowledge to train a better classifier in the original space.

General Classification

Mind the Nuisance: Gaussian Process Classification using Privileged Noise

no code implementations NeurIPS 2014 Daniel Hernández-Lobato, Viktoriia Sharmanska, Kristian Kersting, Christoph H. Lampert, Novi Quadrianto

That is, in contrast to the standard GPC setting, the latent function is not just a nuisance but a feature: it becomes a natural measure of confidence about the training data by modulating the slope of the GPC sigmoid likelihood function.

Classification General Classification

The Supervised IBP: Neighbourhood Preserving Infinite Latent Feature Models

no code implementations26 Sep 2013 Novi Quadrianto, Viktoriia Sharmanska, David A. Knowles, Zoubin Ghahramani

We propose a probabilistic model to infer supervised latent variables in the Hamming space from observed data.

Retrieval

Bayesian Structured Prediction Using Gaussian Processes

1 code implementation15 Jul 2013 Sebastien Bratieres, Novi Quadrianto, Zoubin Ghahramani

We introduce a conceptually novel structured prediction model, GPstruct, which is kernelized, non-parametric and Bayesian, by design.

Gaussian Processes Structured Prediction

Optimal Web-Scale Tiering as a Flow Problem

no code implementations NeurIPS 2010 Gilbert Leung, Novi Quadrianto, Kostas Tsioutsiouliklis, Alex J. Smola

We present a fast online solver for large scale maximum-flow problems as they occur in portfolio optimization, inventory management, computer vision, and logistics.

Management Portfolio Optimization

Multitask Learning without Label Correspondences

no code implementations NeurIPS 2010 Novi Quadrianto, James Petterson, Tibério S. Caetano, Alex J. Smola, S. V. N. Vishwanathan

We propose an algorithm to perform multitask learning where each task has potentially distinct label sets and label correspondences are not readily available.

Data Integration General Classification

Distribution Matching for Transduction

no code implementations NeurIPS 2009 Novi Quadrianto, James Petterson, Alex J. Smola

Many transductive inference algorithms assume that distributions over training and test estimates should be related, e. g. by providing a large margin of separation on both sets.

General Classification regression

Kernelized Sorting

no code implementations NeurIPS 2008 Novi Quadrianto, Le Song, Alex J. Smola

Object matching is a fundamental operation in data analysis.

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