Search Results for author: Nick Koudas

Found 9 papers, 1 papers with code

AXOLOTL: Fairness through Assisted Self-Debiasing of Large Language Model Outputs

no code implementations1 Mar 2024 Sana Ebrahimi, Kaiwen Chen, Abolfazl Asudeh, Gautam Das, Nick Koudas

Pre-trained Large Language Models (LLMs) have significantly advanced natural language processing capabilities but are susceptible to biases present in their training data, leading to unfair outcomes in various applications.

Fairness Language Modelling +2

ActiveDP: Bridging Active Learning and Data Programming

no code implementations8 Feb 2024 Naiqing Guan, Nick Koudas

Modern machine learning models require large labelled datasets to achieve good performance, but manually labelling large datasets is expensive and time-consuming.

Active Learning

Can Large Language Models Design Accurate Label Functions?

no code implementations1 Nov 2023 Naiqing Guan, Kaiwen Chen, Nick Koudas

This evaluation unveils both the strengths and limitations of contemporary PLMs in LF design.

Effective Explanations for Entity Resolution Models

1 code implementation24 Mar 2022 Tommaso Teofili, Donatella Firmani, Nick Koudas, Vincenzo Martello, Paolo Merialdo, Divesh Srivastava

CERTA builds on a probabilistic framework that aims at computing the explanations evaluating the outcomes produced by using perturbed copies of the input records.

Attribute counterfactual +2

Efficient Construction of Nonlinear Models over Normalized Data

no code implementations23 Nov 2020 Zhaoyue Chen, Nick Koudas, Zhe Zhang, Xiaohui Yu

For the case of NN, we propose algorithms to train the network taking normalized data as the input.

Evaluating Temporal Queries Over Video Feeds

no code implementations2 Mar 2020 Yueting Chen, Xiaohui Yu, Nick Koudas

We propose two techniques, MFS and SSG, to organize all detected objects in the intermediate data generation layer, which effectively, given the queries, minimizes the number of objects and frames that have to be considered during query evaluation.

Object object-detection +2

Video Monitoring Queries

no code implementations24 Feb 2020 Nick Koudas, Raymond Li, Ioannis Xarchakos

We demonstrate that the application of the techniques proposed in conjunction with declarative queries on video streams can dramatically increase the frame processing rate and speed up query processing by at least two orders of magnitude.

Image Classification object-detection +1

Multi-Attribute Selectivity Estimation Using Deep Learning

no code implementations24 Mar 2019 Shohedul Hasan, Saravanan Thirumuruganathan, Jees Augustine, Nick Koudas, Gautam Das

Selectivity estimation - the problem of estimating the result size of queries - is a fundamental problem in databases.

Attribute Density Estimation

Approximate Query Processing using Deep Generative Models

no code implementations24 Mar 2019 Saravanan Thirumuruganathan, Shohedul Hasan, Nick Koudas, Gautam Das

We use deep generative models, an unsupervised learning based approach, to learn the data distribution faithfully such that aggregate queries could be answered approximately by generating samples from the learned model.

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