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The Usefulness of Useless Knowledge (1939) [pdf]

https://www.ias.edu/sites/default/files/library/UsefulnessHarpers.pdf
1•bookofjoe•47s ago•0 comments

Optimizing for non-uniform memory and cache effects in Stockfish

https://anemato.de/blog/nuca
1•anematode•1m ago•0 comments

Request for developer feedback: focusgroup RFC

https://developer.chrome.com/blog/focusgroup-rfc
1•agos•5m ago•0 comments

The Film That Should Be Nominated

https://animationobsessive.substack.com/p/the-film-that-should-be-nominated
1•vinhnx•6m ago•0 comments

Wiggmap

https://wiggmap.com/
2•wiggmap•10m ago•1 comments

AI job search with voice interview coaching and deep employer research

https://www.tumblr.com/login_required/wonderfullysacredtrap
1•Uniqu•11m ago•0 comments

Show HN: Wikimetron – Surface hidden sensitivity and risk in Wikipedia

https://github.com/opinionscience/wikimetron2.0
1•hjbarraza•12m ago•0 comments

The Structure of Engineering Revolutions

https://webdirections.org/blog/the-structure-of-engineering-revolutions/
1•BerislavLopac•18m ago•0 comments

How to Send Email to Space

https://buttondown.com/blog/email-in-space
1•maguay•18m ago•0 comments

An Ode to Bzip

https://purplesyringa.moe/blog/an-ode-to-bzip/
2•Expurple•24m ago•0 comments

AI is supercharging fake work

2•rxm233•24m ago•0 comments

Open Source PLFM Radar. Up to 20Km Range

https://hackaday.io/project/205190-open-source-plfm-radar-up-to-20km-range
2•ikbdsk•24m ago•0 comments

Celebrating Interesting Flickr Technologies

https://medium.com/@brightcarvings/celebrating-flickr-technology-3c93c8ddecc2
3•steerpike•25m ago•1 comments

Display of Pattern Formation Using the Gierer-Meinhardt Model

https://itp.uni-frankfurt.de/~gros/StudentProjects/Projects_2020/projekt_fischer_mrozinski/#heading2
1•o4c•25m ago•0 comments

KindScreen – a parent-reviewed catalog of safe YouTube for kids

https://kindscreen.org/
2•marcogarces•27m ago•1 comments

3D-Knitting: The Ultimate Guide

https://www.oliver-charles.com/pages/3d-knitting
9•ChadNauseam•30m ago•0 comments

Show HN: Refund and Arbitration Protocol for Agents

https://www.x402r.org/
1•AliAbdoli•33m ago•0 comments

The Isolation Trap: Erlang

https://causality.blog/essays/the-isolation-trap/
2•enz•35m ago•0 comments

Heinzel: AI-powered sysadmin ruleset. Now supports OpenCode and Ollama models

https://github.com/wintermeyer/heinzel
2•wintermeyer•36m ago•0 comments

Reliable Software in the LLM Era

https://quint-lang.org/posts/llm_era
2•mempirate•38m ago•0 comments

Pray Focus: I built an app that locks distracting apps until you finish praying

https://www.prayfocus.app/en
2•marijan_div•38m ago•1 comments

Most read-later apps are beautifully organized failure

1•northerndev•44m ago•1 comments

Someone just open sourced the OS for running company with zero employees

https://github.com/onera-app/onera-operator
2•shreyaspapi•45m ago•1 comments

Everyone's Worried About Taiwan. The Real Vulnerability Is in Wales

https://medium.com/@tbelbek/everyones-worried-about-taiwan-the-real-vulnerability-is-already-in-n...
1•rdstrtwlkr•49m ago•0 comments

Dear parents, social media are yesterday's battle

https://mfioretti.substack.com/p/dear-parents-social-media-are-yesterdays
1•pabs3•52m ago•0 comments

Wrong Ban?

https://leaflessca.wordpress.com/2026/02/09/wrong-ban/
2•pabs3•53m ago•0 comments

My identity was stolen and someone is using it to catfish men – it's terrifying

https://www.bbc.co.uk/news/articles/c89kdn3e185o
1•dijksterhuis•53m ago•0 comments

The Download: Pokémon Go to train world models, and the US-China race to find a

https://www.technologyreview.com/2026/03/11/1134174/the-download-pokemon-go-train-world-models-us...
1•joozio•54m ago•0 comments

Show HN: Guardio – control your AI Agent

https://github.com/radoslaw-sz/guardio
1•radoslaw-sz•55m ago•0 comments

America and Israel built military targeting machines: Software

https://www.economist.com/international/2026/03/11/how-america-and-israel-built-vast-military-tar...
1•supernikita•55m ago•1 comments
Open in hackernews

Ask HN: Why is big O often used in CS when omega or theta should be used?

2•amichail•10mo ago
Do most people not know about omega and theta or perhaps they intentionally misuse asymptotic notation?

Comments

adrianN•10mo ago
Finding lower bounds is generally more difficult.
amichail•10mo ago
People often use big O notation in all cases including for lower bounds.
adrianN•10mo ago
BigO for lower bounds is plain wrong
numpad0•10mo ago
Those aren't in the ASCII table.
compressedgas•10mo ago
I've found some people on a well known QA site to be so strict with big-O notation that I don't use it anymore and instead only refer to constant, linear, quadratic time and so on. Even when O(1), O(n), O(n^2) would be actually easier to write even if they are technically wrong.