Afolabi Olawale

research · 2025

Fighting Fraud with Machine Learning

Fraud detection on 1M+ interbank transactions at a 0.3% fraud rate, with no synthetic balancing. A self-audit caught a data-leakage bug and lifted AUC-ROC from 0.82 to 0.92, and SHAP plus Gemini explain every flag.

  • Fraud Detection
  • Random Forest
  • SHAP
  • Feature Engineering
  • Python

research · 2025

Sign Language Hand Gesture Recognition with CNN

A convolutional network that classifies 25 American Sign Language hand gestures. Dropout, augmentation and early stopping took test accuracy from 98.65% to 99.78%, with a real-time Flask webcam demo.

  • Deep Learning
  • Computer Vision
  • CNN
  • TensorFlow
  • Flask

research · 2025

Sentiment Lab — Twitter Sentiment Classification Baseline

A TF-IDF and Naive Bayes baseline for classifying gaming and brand tweets as positive or negative. It reaches 62% accuracy on a small test set, reported as a first baseline with the missing steps named.

  • NLP
  • Sentiment Analysis
  • Scikit-learn
  • TF-IDF
  • NLTK

research · 2025

AI-Powered Sentence Completion for Video Game Narratives

Train a model on video-game scripts and lore and it starts writing like one. TF-IDF and Naive Bayes finish a sentence like "the hero must" in the right narrative tone.

  • NLP
  • Text Generation
  • Scikit-learn
  • TF-IDF
  • NLTK

research · 2024

Market Basket Analysis & Collaborative Filtering

What customers buy together and why. Market basket analysis finds the patterns, then item-based collaborative filtering recommends products to the Bronze customer segment.

  • Python
  • Recommendation Systems
  • Market Basket Analysis
  • Pandas
  • Scikit-learn

research · 2024

Bank Marketing Insights — Data Cleaning & Correlation Analysis

Cleaning and correlation analysis of a bank campaign dataset to find what tracks with success. The linearity check failed, so the project stopped at correlation insights.

  • Python
  • Pandas
  • Feature Engineering
  • Correlation Analysis
  • EDA

research · 2024

Factor Analysis & Linear Regression on Perfectionism Data

Exploratory factor analysis on perfectionism survey data, then a regression of the latent factors on self-doubt. Run in jamovi, as analysis rather than software.

  • Factor Analysis
  • Linear Regression
  • Statistical Modeling
  • Jamovi
  • Behavioral Data

research · 2024

Data Predictive Insights ETL Pipeline

An ETL pipeline that pulls powerlifting competition data into a normalized PostgreSQL schema, trains a scoped regression (R² 0.411) and feeds Power BI dashboards.

  • Python
  • PostgreSQL
  • ETL
  • Power BI
  • Data Engineering

research · 2024

Bike-Sharing Rider Efficiency & Profitability Analysis

SQL analysis of a bike-sharing system: ridership joined to cost data to compute real profit and find the best time slots, with a Power BI dashboard for operations teams.

  • SQL
  • Power BI
  • Data Analytics
  • Business Intelligence