Background

Tammy Hartline

Technical Project Samples

🎮 Lazy Eye Training Games - Interactive Vision Therapy Platform

A comprehensive web-based vision therapy platform designed to help individuals with amblyopia (lazy eye) through engaging, interactive games. The platform features dichoptic therapy modes using red-blue 3D glasses to force binocular cooperation and strengthen the weaker eye.

Key Features:

  • Multi-Game Platform: Tetris Block Training, Breakout Ball Game, and Target Tracking exercises
  • Dichoptic Vision Therapy: Color-separated displays for red-blue 3D glasses with dynamic color assignment
  • Professional Game Mechanics: Real-time collision detection, responsive controls, progressive difficulty scaling
  • Medical Application: Session timers, lives system, streak tracking, and therapeutic timing considerations
  • Accessibility Focus: High contrast modes, WCAG 2.1 AA compliant design, mobile optimization

Technical Implementation:

Built with advanced JavaScript ES6+ featuring:

  • Object-Oriented Architecture: Class-based design with modular game system and state management
  • Advanced Game Physics: Collision detection algorithms, velocity calculations, and vector mathematics
  • Performance Optimization: 60fps game loops, memory management, and efficient DOM manipulation
  • Responsive Design: CSS Grid/Flexbox layouts with mobile-first approach and cross-browser compatibility

Complex Problem Solving:

Overcame significant technical challenges including:

  • Precision Collision Detection: Implemented continuous collision detection to prevent ball pass-through during high-speed movement
  • Dynamic Boundary Management: Real-time container dimension detection for responsive game boundaries
  • Medical Color Management: Centralized dichoptic color system for therapeutic effectiveness
  • Cross-Platform Physics: Consistent game behavior across different devices and screen sizes

Skills Demonstrated:

This project showcases expertise in:

  • Frontend Development: Advanced JavaScript, CSS3 animations, HTML5 semantic markup
  • Game Development: Physics simulation, game loop architecture, input handling systems
  • Mathematical Computing: Vector mathematics, physics calculations, algorithm optimization
  • Medical Technology: Understanding of vision therapy principles and therapeutic applications
  • Performance Engineering: Frame rate optimization, memory management, efficient algorithms

Live Demo GitHub Repository

Interactive Game Platform Preview

🏆 Technical Achievements

  • Performance: Maintains 60fps on devices with >2GB RAM
  • Accessibility: WCAG 2.1 AA compliant with therapeutic color considerations
  • Browser Support: 95%+ compatibility across modern browsers
  • Mobile Responsive: Optimized for screens 320px-2560px wide
  • Load Time: <2 seconds initial load, <500ms game switching

Global Workforce Availability Application

Developed a comprehensive web application to solve communication challenges in global remote workforce management. The application allows employees to set and update their weekly availability, providing real-time insights for team coordination and reducing communication friction across different time zones.

Key Features:

  • User-friendly availability scheduling interface
  • Real-time availability tracking
  • Automated weekly reporting system
  • Secure authentication with Google Cloud
  • Data persistence with Firebase and BigQuery

Problem Statement:

Large remote and on-site global workforces face communication challenges due to:

  • Varying time zones and work schedules
  • Lack of visibility into team member availability
  • Inefficient coordination for meetings and collaborative work

Solution:

Created a centralized platform that:

  • Provides real-time visibility of team availability
  • Simplifies scheduling across time zones
  • Reduces communication overhead and improves team coordination
  • Integrates with existing calendar systems

Live Demo

Live Application Preview

Sustainability Data Visualization System

Designed and implemented a comprehensive data visualization system for Southern New Hampshire University's sustainability initiatives. The system transformed raw environmental data into actionable insights, contributing to the university achieving Silver status in sustainability rankings.

Key Features:

  • Interactive dashboards for energy consumption, waste management, and carbon footprint
  • Automated data collection and processing pipeline
  • Trend analysis and forecasting capabilities
  • Customizable reporting for different stakeholders
  • Integration with existing university systems

Technical Implementation:

Utilized Python, SQL, and Power BI to create a robust data pipeline and visualization system that:

  • Consolidated data from multiple sources into a unified database
  • Implemented data cleaning and transformation processes
  • Created intuitive visualizations for technical and non-technical users
  • Enabled data-driven decision making for sustainability initiatives