[cosc-grad-students-list] iCORE Workshops

[Khan, Ayesha]

Good morning, everyone!

iCORE will be hosting a talk by Dr. Evan Krell, this Thursday (4/30) at 4:00 PM. Join us in NRC 2100 or on Teams!

Machine Learning Workshop: Imbalanced Data Strategies

Presenter: Dr. Evan Krell (Naval Research Lab - Marine Meteorology Division)

Abstract: A major challenge in machine learning is dealing with imbalanced datasets. That is, where the dataset does not have an equal number of samples from each class. In some situations, the dataset can be very imbalanced because of the actual rarity of certain events, so class balance can not be obtained through additional sampling. For example, to train a model for predicting hurricanes there are very few hurricane examples compared to a massive amount of non-hurricane examples. This makes it difficult to model extreme events.

To deal with this, several class balancing methods have been proposed that have become very popular: Random Undersampling, Random Oversampling, SMOTE, and weighted loss functions. While they can be effective at improving skill at predicting the minority class, they have some major disadvantages. Mainly, the output probability loses any statistical meaning.

In this workshop, I show that these data balancing methods might not do what you think they are doing and that there is another, simpler, alternative for tuning models under class imbalance that is applied after training the model so that the original probabilities that represent the training distribution are maintained.

[cid:5072f664-a02f-4e57-b816-c16e4d6038b1]

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iCORE Workshops are bi-weekly starting at 4:00pm. They follow iCORE update meetings (3:30PM). All are welcome to both or either meeting.


Date

Workshop Topic

Speaker

2/19/2026

Data Compression in Social Networks

Dr. Chandra Sekharan

3/5/2026

Agentic AI

Dr Chris Bird

3/19/2026

Fog Prediction proposal

Abdullah Bdeir

3/26/2026

Fall Detection

Leana Bouse

4/2/2026

NO meeting Leana Bouse defense at 1pm

4/16/2026

Data Visualization

Dr Scott King

4/30/2026

Data Imbalance

Dr Evan Krell


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Microsoft Teams meeting

Join: https://teams.microsoft.com/meet/26478700344166?p=JpVaR81fEv3xHdzIe5<https://nam12.safelinks.protection.outlook.com/ap/t-59584e83/?url=https%3A%2F%2Fteams.microsoft.com%2Fmeet%2F26478700344166%3Fp%3DJpVaR81fEv3xHdzIe5&data=05%7C02%7Ccosc-grad-students-list%40listserv.tamucc.edu%7C92f9bf33ef524c4bdff008dea484ab98%7C34cbfaf167a64781a9ca514eb2550b66%7C0%7C0%7C639129087002178242%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=NPiL8fxxnRE7NZMdtjF6Y%2FybzTLlWIUhUDrsizGKkog%3D&reserved=0>

Meeting ID: 264 787 003 441 66

Passcode: co65Ah9b

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