Blog

Mert Özen's blog posts on software development, backend, frontend, and DevOps.

Series

.NET Core Web API 36 Angular 31 JavaScript Basics 19 JavaScript Intermediate 18 JavaScript Advanced 16 TypeScript Basics 14 TypeScript Intermediate 14 TypeScript Advanced 12 Entity Framework Core 28 Dapper 16 Git & GitHub 29 Web Security (OWASP Top 10) 21 LLM Fundamentals 20

2 posts found #embedding

Newest Oldest Popular

Artificial Intelligence PART 13

Embeddings and Similarity for LLMs: Searching Text by Meaning

What is an embedding and how do you compute cosine similarity? We produce 768-dimensional vectors with nomic-embed-text, write cosine similarity by hand in C# and TypeScript, build a small in-memory semantic search and compare it with keyword search. The negation trap and the limits with Turkish queries, with real scores.

6 Nov 2026 13 min 7

Artificial Intelligence PART 14

LLMs and RAG: Answering with Data the Model Has Never Seen

Asked about the bookstore's return window, gemma3:4b confidently said 30 days; the right answer is 21. We split the policies into chunks, index them with nomic-embed-text, put the closest chunks into the prompt and get the model to say it doesn't know what isn't in the context. A minimal in-memory RAG in C# and its limits.

6 Nov 2026 11 min 6