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projects

Reviving the AT&T Sceptre

dialup.world/blog

I don’t know when I first became aware of the AT&T Sceptre. It was several years ago; I think someone posted a photo of one somewhere and I became instantly mesmerized by the weird little beige box. I always liked the design language of the basic set-top-box with black bezel and an iconic...

Portmaster Password Recovery Wasm

dialup.world/blog

After buying a Livinston/Lucent Portmaster 2 a while back and being locked out of the machine due to not knowing the password, I eventually stumbled upon the wonderful PortMaster password recovery tool by jolly and used it to instantly gain access to my Portmaster. A Portmaster 2e...

LLM Art

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Trying out Cursor, Claude Sonnet 3.7, Grok 3 beta, etc.

Spatial Vector Algebra

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I’ve found spatial vector algebra pretty confusing, as commonly found in most physics engines. So I wanted to derive a few properties here for my own sanity. Spatial vector algebra combines linear and angular parts of motions, forces, and transformations into 6D spatial vectors (see Rigid Body...

tech interviews

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About this time last year, I was studying for Machine Learning Engineer (MLE) interviews for large tech companies. I received offers from Google, Facebook, Magic Leap, Twitter, Airbnb, Etsy, and Wework. I got rejections after 3 onsites (Stripe, Two Sigma, and a startup) and several other phone...

Boxes

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Here are some boxes drawn with html canvas. Fiddle with the settings! .post .post-content li { font-size: 12px; margin: 0; list-style-type: none; } .post .post-content ul { padding: 0; } canvas { margin: 0 auto; display: block; } .dg.main { margin: 0 auto;...

Tensorflow in Docker

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Here are some snags I found when running Tensorflow models on Docker that can increase memory usage up to ~7x and increase inference time up to ~30x running on CPU. 1. CPU issues When running tensorflow in docker, tensorflow thinks that it owns all the resources on the machine that docker is...

No free lunch

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What is the No Free Lunch Theorem? The No Free Lunch Theorem was posited by David Wolpert and William Macready, which first appeared in the paper “No Free Lunch Theorems of Optimization” in 1997. The abstract says: “for any algorithm, any elevated performance over one class of problems is...