--- title: "Olena Yaroshenko (@yarol) | Hashnode" description: "PhD in Economics | Public Speaker | Data Scientist | AI Engineer. Read the latest articles by Olena Yaroshenko on Hashnode." url: "https://hashnode.com/@yarol" --- @yarol # Olena Yaroshenko @yarol · Ukraine · Joined January 2024 PhD in Economics | Public Speaker | Data Scientist | AI Engineer ### [Building Academic Analytics Dashboard with R Shiny](https://yaroshenkowrites.dev/building-academic-analytics-dashboard-with-r-shiny?utm_source=hashnode&utm_medium=feed) A practical solution for Ukrainian higher education institutions 5 min read · [yaroshenkowrites.dev](https://yaroshenkowrites.dev/building-academic-analytics-dashboard-with-r-shiny?utm_source=hashnode&utm_medium=feed) [Aug 7, 2025](https://hashnode.com/posts/building-academic-analytics-dashboard-with-r-shiny/6894b2bd3cb3d3fd5ac39f13) ### [Transforming Traffic Cameras into AI-Powered Air Quality Sensors](https://yaroshenkowrites.dev/how-ai-transforms-traffic-cameras-into-air-quality-sensors?utm_source=hashnode&utm_medium=feed) Imagine if every traffic camera in your city could double as an air quality sensor. That's precisely what we've achieved using computer vision and machine learning—reaching an impressive 97.2% accuracy in predicting PM10 pollution levels simply by an... 7 min read · [yaroshenkowrites.dev](https://yaroshenkowrites.dev/how-ai-transforms-traffic-cameras-into-air-quality-sensors?utm_source=hashnode&utm_medium=feed) [Jun 26, 2025](https://hashnode.com/posts/how-ai-transforms-traffic-cameras-into-air-quality-sensors/685d14a51182d6265e427b15) ### [Building AI-Powered Q&A Systems for Universities](https://yaroshenkowrites.dev/building-ai-powered-qanda-systems-for-universities?utm_source=hashnode&utm_medium=feed) In recent years, generative artificial intelligence has fundamentally changed how users interact with information systems, opening new possibilities in education. Higher education institutions face challenges communicating effectively with many appli... 4 min read · [yaroshenkowrites.dev](https://yaroshenkowrites.dev/building-ai-powered-qanda-systems-for-universities?utm_source=hashnode&utm_medium=feed) [Apr 9, 2025](https://hashnode.com/posts/building-ai-powered-qanda-systems-for-universities/67f68bb2f028d68c4cf65168) ### [Building Statistics PDF Reports as a Service](https://yaroshenkowrites.dev/building-statistics-pdf-reports-as-a-service?utm_source=hashnode&utm_medium=feed) 1\. Introduction: The Evolution of Data Analysis In recent years, data analysis approaches have undergone a notable transformation. Businesses now have access to significant amounts of customer data, often reaching terabytes in size. Similarly, resear... 6 min read · [yaroshenkowrites.dev](https://yaroshenkowrites.dev/building-statistics-pdf-reports-as-a-service?utm_source=hashnode&utm_medium=feed) [Mar 29, 2025](https://hashnode.com/posts/building-statistics-pdf-reports-as-a-service/67e81f197381a272903c32af)