Search Results for author: Osmar Zaiane

Found 16 papers, 8 papers with code

DeepBlues@LT-EDI-ACL2022: Depression level detection modelling through domain specific BERT and short text Depression classifiers

no code implementations LTEDI (ACL) 2022 Nawshad Farruque, Osmar Zaiane, Randy Goebel, Sudhakar Sivapalan

In addition we can use short text classifiers to extract relevant text from the long text and achieve slightly better accuracy, albeit, trading off with the processing time for extracting such excerpts.

Narrowing the semantic gaps in U-Net with learnable skip connections: The case of medical image segmentation

3 code implementations23 Dec 2023 Haonan Wang, Peng Cao, Xiaoli Liu, Jinzhu Yang, Osmar Zaiane

Hence, both modules establish a learnable connection to solve the semantic gaps between the encoder and the decoder, which leads to a high-performance segmentation model for medical images.

Image Segmentation Medical Image Segmentation +2

Exploring Best Practices for ECG Signal Processing in Machine Learning

1 code implementation2 Nov 2023 Amir Salimi, Sunil Vasu Kalmady, Abram Hindle, Osmar Zaiane, Padma Kaul

In this work we apply down-sampling, normalization, and filtering functions to 3 different multi-label ECG datasets and measure their effects on 3 different high-performing time-series classifiers.

Multi-Label Classification

Depression Symptoms Modelling from Social Media Text: A Semi-supervised Learning Approach

no code implementations6 Sep 2022 Nawshad Farruque, Randy Goebel, Sudhakar Sivapalan, Osmar Zaiane

In our work, we describe a Semi-supervised Learning (SSL) framework which uses an initial supervised learning model that leverages 1) a state-of-the-art large mental health forum text pre-trained language model further fine-tuned on a clinician annotated DSD dataset, 2) a Zero-Shot learning model for DSD, and couples them together to harvest depression symptoms related samples from our large self-curated Depression Tweets Repository (DTR).

Active Learning Depression Detection +2

FaithDial: A Faithful Benchmark for Information-Seeking Dialogue

1 code implementation22 Apr 2022 Nouha Dziri, Ehsan Kamalloo, Sivan Milton, Osmar Zaiane, Mo Yu, Edoardo M. Ponti, Siva Reddy

The goal of information-seeking dialogue is to respond to seeker queries with natural language utterances that are grounded on knowledge sources.

Dialogue Generation Hallucination

Named Entity Recognition for Partially Annotated Datasets

no code implementations19 Apr 2022 Michael Strobl, Amine Trabelsi, Osmar Zaiane

The most common Named Entity Recognizers are usually sequence taggers trained on fully annotated corpora, i. e. the class of all words for all entities is known.

named-entity-recognition Named Entity Recognition +1

On the Origin of Hallucinations in Conversational Models: Is it the Datasets or the Models?

1 code implementation NAACL 2022 Nouha Dziri, Sivan Milton, Mo Yu, Osmar Zaiane, Siva Reddy

Knowledge-grounded conversational models are known to suffer from producing factually invalid statements, a phenomenon commonly called hallucination.

Hallucination

FREDA: Flexible Relation Extraction Data Annotation

1 code implementation14 Apr 2022 Michael Strobl, Amine Trabelsi, Osmar Zaiane

To effectively train accurate Relation Extraction models, sufficient and properly labeled data is required.

Relation Relation Extraction

A comprehensive empirical analysis on cross-domain semantic enrichment for detection of depressive language

no code implementations24 Jun 2021 Nawshad Farruque, Randy Goebel, Osmar Zaiane

We start with a rich word embedding pre-trained from a large general dataset, which is then augmented with embeddings learned from a much smaller and more specific domain dataset through a simple non-linear mapping mechanism.

Data Ablation

STEP-EZ: Syntax Tree guided semantic ExPlanation for Explainable Zero-shot modeling of clinical depression symptoms from text

no code implementations21 Jun 2021 Nawshad Farruque, Randy Goebel, Osmar Zaiane, Sudhakar Sivapalan

We focus on exploring various approaches of Zero-Shot Learning (ZSL) and their explainability for a challenging yet important supervised learning task notorious for training data scarcity, i. e. Depression Symptoms Detection (DSD) from text.

Zero-Shot Learning

Basic and Depression Specific Emotion Identification in Tweets: Multi-label Classification Experiments

no code implementations26 May 2021 Nawshad Farruque, Chenyang Huang, Osmar Zaiane, Randy Goebel

In this paper, we present empirical analysis on basic and depression specific multi-emotion mining in Tweets with the help of state of the art multi-label classifiers.

Multi-Label Classification Multi-Label Learning

Neural Path Hunter: Reducing Hallucination in Dialogue Systems via Path Grounding

1 code implementation EMNLP 2021 Nouha Dziri, Andrea Madotto, Osmar Zaiane, Avishek Joey Bose

Dialogue systems powered by large pre-trained language models (LM) exhibit an innate ability to deliver fluent and natural-looking responses.

Hallucination

Building a Competitive Associative Classifier

no code implementations4 Jul 2020 Nitakshi Sood, Osmar Zaiane

We use 15 UCI datasets and compare our approach with eight existing systems. The SigD2 and boosted SigDirect (ACboost) ensemble model outperform various state-of-the-art classifiers not only in terms of classification accuracy but also in terms of the number of rules.

BIG-bench Machine Learning Classification +1

WEXEA: Wikipedia EXhaustive Entity Annotation

no code implementations LREC 2020 Michael Strobl, Amine Trabelsi, Osmar Zaiane

Building predictive models for information extraction from text, such as named entity recognition or the extraction of semantic relationships between named entities in text, requires a large corpus of annotated text.

named-entity-recognition Named Entity Recognition +2

Augmenting Neural Response Generation with Context-Aware Topical Attention

1 code implementation WS 2019 Nouha Dziri, Ehsan Kamalloo, Kory W. Mathewson, Osmar Zaiane

Our model is built upon the basic Seq2Seq model by augmenting it with a hierarchical joint attention mechanism that incorporates topical concepts and previous interactions into the response generation.

Open-Domain Dialog Response Generation +1

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