Dementia Classification AI

Motivation

We wanted to create a classification model that would be able to detect if a patient has dementia based on a set of 61 layers of an MRI scan. If successful, this model could be a support tool for doctors to detect if a patient has dementia. It may not be the definitive way to detect if a patient has dementia, but it could be helpful for doctors to see what the model thinks the patient has and with what confidence.

Data

The data comes from the OASIS Alzheimer’s dataset, a public dataset consisting of 80,000 MRI images. Since 61 MRI images are for a single patient, it means we have over 1300 patients worth of data in this dataset. The data was downloaded from Kaggle, but can also be accessed through the OASIS website.

The HackAI 2024 Model

As a part of the OSU AI Club Hack AI 2024, this project was selected by the team to try in complete in the 24-hour hackathon. We downsized the OASIS images and converted them to grayscale to decrease training time and complexity. We stacked each of the 61 MRI images per patient into a 3D tensor as a numpy ndarray and saved the patient’s 3D MRI scan as an .npz file. We then amplified some of the moderate dementia and mild dementia samples through duplication, as there weren’t many patients with that classification. We then created a Tensorflow functional model to train on the sample data.

Although we had a good training accuracy, we had a relatively low testing accuracy (indicating overfitting). Unfortunately, due to not having access to a GPU at the hackathon, we could not GPU accelerate the model, and we did not have enough time to test a simpler model. The training accuracy was in the high 90% range, but the testing accuracy hovered around high 70%.

Although this repository is being integrated with the Hack AI 2024 repository (meaning the files here will now also be there), the older version of the model can still be found by looking back in the commits here.

This Model & Results

We revisited this model to try and create a better model. We continued to use the stacked 3D tensors. The creation file for them is located in the npz_generation.py file.

We created a simpler Tensorflow functional model and GPU accelerated with an NVIDIA RTX 3060 to decrease training time. We added training callbacks of ModelCheckpoint and EarlyStopping to save the best possible model. We got a training accuracy of 100% (it isn’t really 100%, it is being rounded) with a testing accuracy of 97.31%, indicating that our model makes much better generalizations this time around.

Loss and accuracy graphs:

Confusion matrix:

See the full project on Github

Starr Programming Language

Example Syntax:

int one(int a) {
  int x = a * 5
  return x + 3
}

int two() {
  return 5 % 3
}

out(one(12)) // Outputs 63
out(two()) // Outputs 2

See the current project on Github

Dot on Wheel Animation

Problem:

A wheel with radius R has a constant angular velocity in the -z direction (so the wheel rolls in +x). There is a dot on the wheel a distance p away from the center where p>0. We wish for R>p, but we do explore when p>R and even when p=R. We wish to animate the motion of this dot.

Result:

We go through many different results and iterations of animation. The entire process is on the Github tied to the project. This was the final result for R=2, angular velocity of -2, and p=1, and for values of p=2 and p=4.

p=1:

p=2:

p=4:

_{Note that the original project used a .mov file. This resulting .gif is of lower quality than the original video}

See the full project on Github

Graphene Unsupervised AI Clustering

Example Output:

See the current project on Github

_{There was a poster presentation associated with this. For discretion regarding the others involved, it has not been included on this website}

Chocolate - Vanilla Minecraft Extension

Implementations:

This project implements a lot. To see the custom behavior, check the wiki of the repository

Addition Example:

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House Price AI, Revisited

Process:

Use Pandas to read a csv into a DataFrame. Drop all date and location information and ensure we are only working with numerical data for regression. Deal with null values accordingly, and then split the data into training and testing sets. Define a model that normalizes the data and then trains on 4 ReLU Dense layers of 512 filters with L2 Regularization, and then finish with a singular filter Dense layer. Train the model with a 0.001 learning rate Adam optimzer, using MAE loss. Train the model, and compare the predictions to the true values.

Project File:

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Hemoglobin Binding Project

Project File:

Derivations:

Poster (Obscured):

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PG Stock Price Prediction RNN w/Tensorflow

Process:

Collect csv data into a Pandas DataFrame. Enumerate the data to make it all numbers and then visualize the data to see what we’re working with. We then reshape and compile the closing price data and do the same to the high and low price values. We concatenate that usiny NumPy into one array and scale the data. We split the data into training and testing sets, and then using TensorFlow and Keras to generate a Sequential model with a LSTM and Dense layer. After compiling it and training it on the training set, we then predict the stock price closing value of the test set, and then graph the results to inspect the accuracy.

Snippets:

PG Stock Price Graph:

The RNN Summary:

The Prediction:

The Prediction w/ More Data:

Full Scope of Prediction (Vertical Line Where Prediction Starts):

See the full project on Github

Scikit-Learn House Price AI

Process:

Use Pandas to read a csv into a DataFrame. Enumerate the data to get a frame with only numbers. Check for unusable data and use imputation, if needed, to insert data. After inspecting graphs of the data, normalize the data and filter it accordingly. Split the data into training and test sets, and then model the data using KNeighborsRegressor model and train the data. Then, we predict on the test set and measure the error. Finally, we fiddle with the model a bit to find the most accurate one, and then we’re done.

Snippets:

Information Gain on Parameters (VarianceThreshold Not Pictured):

The r² Values:

The Final Model:

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PandoraPvP

What is Spigot?: Minecraft is a video game made in Java (for non-console systems). Spigot is one of many server-hosting options for Minecraft, like Bukkit, Paper, Yatopia, and more. Spigot allows for programmers to create plugins that are loaded with the server as enhancements. Using Spigot’s API, more optimizations and customizability are available for developers.

This project helped me learn how to organize many tasks into smaller projects, and taught me how to work with more complicated programming systems, like APIs, documentation, and Maven.

See the full project on Github

Discord Bot Applications

Through this project I learned a lot about Python development and asynchronous programming. Additionally, I learned about cloud hosting environments like Heroku and Google Cloud VM to host the bot 24/7. I worked a lot with JSON and SQLite as well to store important data. This project help fuel my love for computer science and also taught me how to handle a large-scale project.

Screenshots:

See an obscured version of one of my bots (Psyduck) on Github