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Charalampos Chelmis

7 accepted papers

2025

Predictive Modeling of Homeless Service Assignment: A Representation Learning Approach

AAAI 2025technical

In recent years, there has been growing interest in leveraging machine learning for homeless service assignment. However, the categorical nature of administrative data recorded for homeless individuals hinders the development of accurate machine learning methods for this task. This work asserts that…

2023

Bayesian Network Modeling and Prediction of Transitions Within the Homelessness System

ICASSP 2023accepted

Administrative data collected by homeless service providers offer a unique opportunity to understand how homeless individuals navigate the homeless system towards securing stable housing. However, the literature on predictive models in the context of homeless service provision has neglected the sequ…

Cited by 0SourceScholar
2023

Sequential Datum-Wise Joint Feature Selection and Classification in the Presence of External Classifier

ICASSP 2023accepted

We introduce a supervised machine learning framework for sequential datum–wise joint feature selection and classification. Our proposed approach sequentially acquires features one at a time during testing until it decides that acquiring more features will not improve label assignment. At that point,…

Cited by 0SourceScholar
2020

On-The-Fly Feature Selection and Classification with Application to Civic Engagement Platforms

ICASSP 2020accepted

Online feature selection and classification is crucial for time sensitive decision making. Existing work however either assumes that features are independent or produces a fixed number of features for classification. Instead, we propose an optimal framework to perform joint feature selection and cla…

Cited by 0SourceScholar
2019

Automating the Classification of Urban Issue Reports: an Optimal Stopping Approach

ICASSP 2019accepted

Empowering citizens to interact directly with their local governments through civic engagement platforms has emerged as an easy way to resolve urban issues. However, for authorities to manually process reported issues is both impractical and inefficient; accurate, online and near-real-time processin…

Cited by 0SourceScholar
2019

Robust Freeway Accident Detection: A Two-Stage Approach

ICASSP 2019accepted

In this paper, the problem of detecting freeway accidents in real-time based on speed readings from spatially distributed road sensors of variable accuracy is addressed. To ensure robust decision-making, a novel two-stage approach is proposed. Specifically, in the first stage, each sensor generates…

Cited by 0SourceScholar
2018

Optimal Online Cyberbullying Detection

ICASSP 2018accepted

Cyberbullying has emerged as a serious societal and public health problem that demands accurate methods for the detection of cyber-bullying instances in an effort to mitigate the consequences. While techniques to automatically detect cyberbullying incidents have been developed, the scalability and t…

Cited by 0SourceScholar