
Project Overview
Project Overview
The PREP project is a sophisticated research platform that analyzes German-language crisis preparedness content at scale. I built a comprehensive system that scraped ~10,000 websites and applied advanced AI analysis to understand how communities prepare for emergencies.
Technical Architecture
Data Collection & Processing
- Automated web scraping pipeline with ethical compliance (robots.txt, rate limiting)
- AI-powered content analysis using GPT-4 for intelligent categorization
- Topic modeling with Python NLP libraries to discover emerging themes
- Structured data storage in MongoDB with advanced querying capabilities
Analysis & Visualization
- 13 primary content categories with 60+ detailed subcategories
- Interactive 3D network graphs showing content relationships (WebGL/D3.js)
- Real-time dashboard with statistics and filtering options
- Export functionality for academic research
Key Technologies
- Frontend: React, TypeScript, D3.js for 3D visualizations, Tailwind CSS
- Backend: Node.js, Express, MongoDB with optimized indexing
- AI Pipeline: Python, OpenAI GPT-4, spaCy, NLTK, Gensim for topic modeling
- Infrastructure: Docker containers, automated testing, comprehensive logging
Research Impact
This platform provides researchers with unprecedented insights into crisis communication patterns, information quality assessment, and regional differences in preparedness messaging across German-speaking communities. The tool has been instrumental in understanding how different groups approach emergency preparedness.
Tech Stack
Security Features
Robots.txt Compliance
Automatic robots.txt parsing and crawl delay enforcement with caching
Rate Limiting & Throttling
Bottleneck-based API rate limiting (500 calls/min) and concurrent request control
CORS Protection
Configured CORS with origin validation and allowed methods restriction
Input Validation
Joi schema validation for all API requests with error handling
Text Sanitization
HTML/Markdown sanitization and XSS prevention in content processing
Error Handling & Logging
Comprehensive error logging and graceful failure recovery mechanisms