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E-Commerce Conversational Agent with Ollama and LangChain

·64 mins
A conversational agent for e-commerce built with Ollama, LangChain, and ChromaDB, comparing three open-source LLMs — Qwen3 4B, Llama 3.2 3B, and Phi-4-mini — for product search, order tracking, recommendations, and RAG-powered FAQ. Benchmarks tool-calling accuracy, multi-intent handling, and response time across all three models.
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A Beginner’s Guide to Markdown: Syntax and Examples

·4 mins
A complete beginner’s guide to Markdown syntax with practical examples, including syntax explanations and code examples. Perfect for writers, developers, and anyone looking to format text efficiently.
Fast Fourier Transform (FFT)

Implementation of a Digital Keyboard Based on Sinusoidal Signals

·7 mins
Sinusoidal signals of the form x(t) = A * sin(wt) are used to generate sounds at a specific frequency, where w = 2 * pi * f. Based on this concept, this project involves the design and implementation of a digital piano capable of generating musical notes.
Emblem of Universidad Nacional de Colombia.

Raspberry Pi 101 UNAL

·6 mins
This is a practical introductory course created for the Digital Technology course at the Universidad Nacional de Colombia, highlighting the potential of Single Board Computers (SBC) such as the Raspberry Pi, where the true power of these devices is achieved through the coding process, which unlocks their full capabilities.