Kogilavani Shanmugavadivel


2023

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KEC_AI_NLP@DravidianLangTech: Abusive Comment Detection in Tamil Language
Kogilavani Shanmugavadivel | Malliga Subramanian | Shri Durga R | Srigha S | Sree Harene J S | Yasvanth Bala P
Proceedings of the Third Workshop on Speech and Language Technologies for Dravidian Languages

Our work aims to identify the negative comments that is associated with Counter-speech,Xenophobia, Homophobia,Transphobia, Misandry, Misogyny, None-of-the-above categories, In order to identify these categories from the given dataset, we propose three different models such as traditional machine learning techniques, deep learning model and transfer Learning model called BERT is also used to analyze the texts. In the Tamil dataset, we are training the models with Train dataset and test the models with Validation data. Our Team Participated in the shared task organised by DravidianLangTech and secured 4th rank in the task of abusive comment detection in Tamil with a macro- f1 score of 0.35. Also, our run was submitted for abusive comment detection in code-mixed languages (Tamil-English) and secured 6th rank with a macro-f1 score of 0.42.

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KEC_AI_NLP@DravidianLangTech: Sentiment Analysis in Code Mixture Language
Kogilavani Shanmugavadivel | Malliga Subaramanian | VetriVendhan S | Pramoth Kumar M | Karthickeyan S | Kavin Vishnu N
Proceedings of the Third Workshop on Speech and Language Technologies for Dravidian Languages

Sentiment Analysis is a process that involves analyzing digital text to determine the emo- tional tone, such as positive, negative, neu- tral, or unknown. Sentiment Analysis of code- mixed languages presents challenges in natural language processing due to the complexity of code-mixed data, which combines vocabulary and grammar from multiple languages and cre- ates unique structures. The scarcity of anno- tated data and the unstructured nature of code- mixed data are major challenges. To address these challenges, we explored various tech- niques, including Machine Learning models such as Decision Trees, Random Forests, Lo- gistic Regression, and Gaussian Na ̈ıve Bayes, Deep Learning model, such as Long Short- Term Memory (LSTM), and Transfer Learning model like BERT, were also utilized. In this work, we obtained the dataset from the Dravid- ianLangTech shared task by participating in a competition and accessing train, development and test data for Tamil Language. The results demonstrated promising performance in senti- ment analysis of code-mixed text. Among all the models, deep learning model LSTM pro- vides best accuracy of 0.61 for Tamil language.

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Team-KEC@LT-EDI: Detecting Signs of Depression from Social Media Text
Malliga S | Kogilavani Shanmugavadivel | Arunaa S | Gokulkrishna R | Chandramukhii A
Proceedings of the Third Workshop on Language Technology for Equality, Diversity and Inclusion

The rise of social media has led to a drastic surge in the dissemination of hostile and toxic content, fostering an alarming proliferation of hate speech, inflammatory remarks, and abusive language. The exponential growth of social media has facilitated the widespread circulation of hostile and toxic content, giving rise to an unprecedented influx of hate speech, incendiary language, and abusive rhetoric. The study utilized different techniques to represent the text data in a numerical format. Word embedding techniques aim to capture the semantic and syntactic information of the text data, which is essential in text classification tasks. The study utilized various techniques such as CNN, BERT, and N-gram to classify social media posts into depression and non-depression categories. Text classification tasks often rely on deep learning techniques such as Convolutional Neural Networks (CNN), while the BERT model, which is pre-trained, has shown exceptional performance in a range of natural language processing tasks. To assess the effectiveness of the suggested approaches, the research employed multiple metrics, including accuracy, precision, recall, and F1-score. The outcomes of the investigation indicate that the suggested techniques can identify symptoms of depression with an average accuracy rate of 56%.

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KEC_AI_NLP_DEP @ LT-EDI : Detecting Signs of Depression From Social Media Texts
Kogilavani Shanmugavadivel | Malliga Subramanian | Vasantharan K | Prethish Ga | Sankar S | Sabari S
Proceedings of the Third Workshop on Language Technology for Equality, Diversity and Inclusion

The goal of this study is to use machine learning approaches to detect depression indications in social media articles. Data gathering, pre-processing, feature extraction, model training, and performance evaluation are all aspects of the research. The collection consists of social media messages classified into three categories: not depressed, somewhat depressed, and severely depressed. The study contributes to the growing field of social media data-driven mental health analysis by stressing the use of feature extraction algorithms for obtaining relevant information from text data. The use of social media communications to detect depression has the potential to increase early intervention and help for people at risk. Several feature extraction approaches, such as TF-IDF, Count Vectorizer, and Hashing Vectorizer, are used to quantitatively represent textual data. These features are used to train and evaluate a wide range of machine learning models, including Logistic Regression, Random Forest, Decision Tree, Gaussian Naive Bayes, and Multinomial Naive Bayes. To assess the performance of the models, metrics such as accuracy, precision, recall, F1 score, and the confusion matrix are utilized. The Random Forest model with Count Vectorizer had the greatest accuracy on the development dataset, coming in at 92.99 percent. And with a macro F1-score of 0.362, we came in 19th position in the shared task. The findings show that machine learning is effective in detecting depression markers in social media articles.

2022

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Findings of the Shared Task on Emotion Analysis in Tamil
Anbukkarasi Sampath | Thenmozhi Durairaj | Bharathi Raja Chakravarthi | Ruba Priyadharshini | Subalalitha Cn | Kogilavani Shanmugavadivel | Sajeetha Thavareesan | Sathiyaraj Thangasamy | Parameswari Krishnamurthy | Adeep Hande | Sean Benhur | Kishore Ponnusamy | Santhiya Pandiyan
Proceedings of the Second Workshop on Speech and Language Technologies for Dravidian Languages

This paper presents the overview of the shared task on emotional analysis in Tamil. The result of the shared task is presented at the workshop. This paper presents the dataset used in the shared task, task description, and the methodology used by the participants and the evaluation results of the submission. This task is organized as two Tasks. Task A is carried with 11 emotions annotated data for social media comments in Tamil and Task B is organized with 31 fine-grained emotion annotated data for social media comments in Tamil. For conducting experiments, training and development datasets were provided to the participants and results are evaluated for the unseen data. Totally we have received around 24 submissions from 13 teams. For evaluating the models, Precision, Recall, micro average metrics are used.

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Findings of the Shared Task on Multi-task Learning in Dravidian Languages
Bharathi Raja Chakravarthi | Ruba Priyadharshini | Subalalitha Cn | Sangeetha S | Malliga Subramanian | Kogilavani Shanmugavadivel | Parameswari Krishnamurthy | Adeep Hande | Siddhanth U Hegde | Roshan Nayak | Swetha Valli
Proceedings of the Second Workshop on Speech and Language Technologies for Dravidian Languages

We present our findings from the first shared task on Multi-task Learning in Dravidian Languages at the second Workshop on Speech and Language Technologies for Dravidian Languages. In this task, a sentence in any of three Dravidian Languages is required to be classified into two closely related tasks namely Sentiment Analyis (SA) and Offensive Language Identification (OLI). The task spans over three Dravidian Languages, namely, Kannada, Malayalam, and Tamil. It is one of the first shared tasks that focuses on Multi-task Learning for closely related tasks, especially for a very low-resourced language family such as the Dravidian language family. In total, 55 people signed up to participate in the task, and due to the intricate nature of the task, especially in its first iteration, 3 submissions have been received.

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Overview of Abusive Comment Detection in Tamil-ACL 2022
Ruba Priyadharshini | Bharathi Raja Chakravarthi | Subalalitha Cn | Thenmozhi Durairaj | Malliga Subramanian | Kogilavani Shanmugavadivel | Siddhanth U Hegde | Prasanna Kumaresan
Proceedings of the Second Workshop on Speech and Language Technologies for Dravidian Languages

The social media is one of the significantdigital platforms that create a huge im-pact in peoples of all levels. The commentsposted on social media is powerful enoughto even change the political and businessscenarios in very few hours. They alsotend to attack a particular individual ora group of individuals. This shared taskaims at detecting the abusive comments in-volving, Homophobia, Misandry, Counter-speech, Misogyny, Xenophobia, Transpho-bic. The hope speech is also identified. Adataset collected from social media taggedwith the above said categories in Tamiland Tamil-English code-mixed languagesare given to the participants. The par-ticipants used different machine learningand deep learning algorithms. This paperpresents the overview of this task compris-ing the dataset details and results of theparticipants.

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Transformers at SemEval-2022 Task 5: A Feature Extraction based Approach for Misogynous Meme Detection
Shankar Mahadevan | Sean Benhur | Roshan Nayak | Malliga Subramanian | Kogilavani Shanmugavadivel | Kanchana Sivanraju | Bharathi Raja Chakravarthi
Proceedings of the 16th International Workshop on Semantic Evaluation (SemEval-2022)

Social media is an idea created to make theworld smaller and more connected. Recently,it has become a hub of fake news and sexistmemes that target women. Social Media shouldensure proper women’s safety and equality. Filteringsuch information from social media is ofparamount importance to achieving this goal. In this paper, we describe the system developedby our team for SemEval-2022 Task 5: MultimediaAutomatic Misogyny Identification. Wepropose a multimodal training methodologythat achieves good performance on both thesubtasks, ranking 4th for Subtask A (0.718macro F1-score) and 9th for Subtask B (0.695macro F1-score) while exceeding the baselineresults by good margins.