Sarah Lea

@Sarah_Lea@techhub.social
60 Followers
32 Following
101 Posts

Tech simplified for curious minds. Covering topics such as Data, AI & ML and Python Programming. Follow for insights that make tech accessible. šŸš€

Enjoying the content? Consider following on Medium:
 https://medium.com/@schuerch_sarah
 https://sarahleaschrch.substack.com/

I'm a digital creator who loves reading, writing & learning new stuff. Ex-Salesforce-Consultant, now working at a Big Tech company, MSc in Data Science in Progress, background in Business Informatics

You don’t need to be a math genius to understand ML.

If formulas like p(x|y) make you freeze — you’re not alone.

 But understanding uncertainty is one key to building better, more human AI systems.

 I wrote a beginner-friendly intro to probabilistic machine learning — no jargon, just plain English.

Thanks Towards Data Science for posting it.

šŸ‘‰ https://towardsdatascience.com/beyond-glorified-curve-fitting-exploring-the-probabilistic-foundations-of-machine-learning/

#datascience #math #machinelearning #ml #deeplearning #ai

Beyond Glorified Curve Fitting: Exploring the Probabilistic Foundations of Machine Learning | Towards Data Science

An introduction to probabilistic thinking — and why it’s the foundation for robust and explainable AI systems.

Towards Data Science

Understand RAG at Easter? 🐣 Why not use the time to learn something new — and build your own local PDF chatbot?

Learn how chunking, embeddings and vector search work in practice - with LangChain, FAISS, Ollama and Mistral running entirely on your machine (no API key required).

Perfect for beginners - here's the full guide & GitHub repo šŸ‘‡

 step-by-step guide: https://bit.ly/3EfOHB9
 GitHub Repo: https://bit.ly/3EtqYgK

#RAG #Langchain #Mistral #LLM #AI #Chatbot #KI #Python #Technology #DataScience #Easter

RAG in Action: Build your Own Local PDF Chatbot as a Beginner

Tools such as Perplexity, ChatGPT, Claude or NotebookLM have completely changed the way we interact with PDFs, technical articles or even entire books. Instead of scrolling page by page, we receive…

Data Science Collective

What happens when a language model solves maths problems?

"If I’m 4 years old and my partner is 3x my age – how old is my partner when I’m 20?"
Do you know the answer?

🤄 An older Llama model (by Meta) said 23.
šŸ¤“ A newer Llama model said 28 – correct.

So what made the difference?

Today I kicked off the 5-day Kaggle Generative AI Challenge.
Day 1: Fundamentals of LLMs, prompt engineering & more.

Three highlights from the session:
ā˜• Chain-of-Thought Prompting
→ Models that "think" step by step tend to produce more accurate answers. Sounds simple – but just look at the screenshots...

ā˜• Parameters like temperature and top_p
→ Try this on together.ai: Prompt a model with ā€œSuggest 5 colorsā€ – once with temperature 0 and once with 2.
Notice the difference?

ā˜• Zero-shot, One-shot, Few-shot prompting
→ The more examples you provide, the better the model understands what you want.

#PromptEngineering #GenerativeAI #LLM #Kaggle #LLMApplications #AI #DataScience #Google #Python #Tech

There is no need to move data. Data latency is minimised. Data can be transformed and analysed within a single platform.

Let me know what you know about Zero-ETL  

Why ETL-Zero? Understanding the shift in Data Integrationā€œ by Sarah Lea on Medium: https://medium.com/towards-data-science/why-etl-zero-understanding-the-shift-in-data-integration-as-a-beginner-d0cefa244154

#python #datalake #cloudcomputing #etl #zeroetl #salesforce #data #tech #technology #datawarehousing #datalakehouse

Why ETL-Zero? Understanding the Shift in Data Integration

When I was preparing for the Salesforce Data Cloud certification, I came across the term Zero-ETL. The Data Cloud offers the possibility to access data directly from other systems such as data…

Towards Data Science

How does your parcel actually arrive on time?  
Behind global delivery networks are algorithms that optimize routes and save time and costs. With PyGame, you can better understand complex situations with simple simulations. For example, you can set up a simple grid system in which a van delivers parcels in a spiral shape.

#python #programming #smartcities #smartcity #pygame #simulation #technology

I don’t think it’s important to understand maths topics in every detail. But mathematical understanding does come up very often if you programming python, creating machine learning models or analysing data.
https://medium.com/@schuerch_sarah/a-beginners-journey-into-key-mathematical-concepts-applied-data-analysis-simplified-137af970ac56

#machinelearning #AI #python #dataanalysis

A Beginner’s Journey into Key Mathematical Concepts: Applied Data Analysis Simplified

I was never at the top in maths, but I wasn’t bad either and always liked it somehow. At the same time, I thought for a long time: if you’re not great at maths, you can’t go into computer science…

Medium