Data Science Espresso by Sarah Lea

Data Science Espresso by Sarah Lea

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Machine Learning

Multi-Armed Bandits: The Simplest Entry Point into Reinforcement Learning
How AI makes smarter decisions by balancing curiosity (exploration) and experience (exploitation).
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Data Science Espresso by Sarah
2
AI, Cancer Cells & a Master's Student's Journey to a Harvard Postdoc
5 insights I take away from an interview with a postdoc about the everyday life, the blending of biomedicine & AI and research
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Data Science Espresso by Sarah
3
What’s behind LangChain, LangGraph & Langflow? A simple hands-on guide.
How to build an LLM chatbot with LangChain (code) and Langflow (visual Drag & Drop Builder) — using Ollama & FAISS
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Data Science Espresso by Sarah
Inspired by AlphaGo’s Move 37 — learn how agents explore, exploit, and win
Reinforcement Learning Made Simple: Build a Q-Learning Agent in Python
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Data Science Espresso by Sarah
You don’t need to be a math genius to understand ML uncertainty
An introduction to probabilistic thinking — and why it’s the foundation for robust and explainable AI systems.
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Data Science Espresso by Sarah
Understanding RAG at Easter? 🐣 Build your Own Local PDF Chatbot as a Beginner
Understanding chunking, embeddings and vector search better by building a PDF chatbot with LangChain, Ollama and Mistral.
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Data Science Espresso by Sarah
RAG in Action: Build your Own Local PDF Chatbot as a Beginner
Understanding chunking, embeddings and vector search better by building a PDF chatbot with LangChain, Ollama and Mistral.
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Data Science Espresso by Sarah
5 takeaways from the 5-day intensive Kaggle x Google course
From Chain-of-Thought to ReAct: Why temperature isn't just about weather and how you can get started right away
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Data Science Espresso by Sarah
From Delivery to Smart Cities: Learn Pygame Simulation Basics
New parcel delivered!
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Data Science Espresso by Sarah
Who Does What in Data? A Practical Introduction to the Role of a Data Engineer & Data Scientist
What does a data engineer do differently to a data scientist?
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Data Science Espresso by Sarah
Introduction to MLOps and Best Practices for resource-efficient Machine Learning Pipelines
What MLOps is and how machine learning pipelines can be set up in a resource-efficient way - a review of 3 papers.
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Data Science Espresso by Sarah
Understanding Generative AI as a Beginner: From the Basics to GANs
Understand the basic principles of Gen AI, the difference between discriminative and generative models and how GANs and transformer models work.
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Data Science Espresso by Sarah
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