depth-first search

John Scholes builds a depth-first tree-search operator step by step in a Dyalog APL session. It covers higher-order functions and runs the search on the N-Queens problem.

Martin Kleppmann's Local-First Conf talk reviewing where the local-first idea came from, where it stands five years after the essay, and what the community should work toward. He argues for generic sync infrastructure.

A short excerpt of Elon Musk, interviewed by Kevin Rose, explaining first-principles reasoning with the example of the car versus improving horse carriages. He warns it takes much more mental energy than reasoning by analogy.

A driver films a police DUI checkpoint on the 4th of July where a drug dog alerts on his car and he is searched without consent, though he broke no laws. He is released without charges after officers learn he was recording.

A Ryan George comedy sketch about the experience of using Google search in 2022, where results are full of ads, spam and Reddit and Amazon detours.

A short comedic complaint by ProZD about YouTube search failing to surface his own video even when searching its exact title. It illustrates how poor search results have become.

A short claymation music video by animator savannahXYZ satirizing how bad web search has become, with SEO spam and ads crowding out real answers. It is comedic rather than analytical.

Richard Hamming's 1995 recording of his talk 'You and Your Research', drawn from his graduate engineering course. He discusses how great scientists pick important problems and build careers, drawing on his years at Bell Labs.

The final lecture of Richard Hamming's Learning to Learn course, from 1995, based on his well-known talk 'You and Your Research'. It covers how to do important work and build a career.

An hour-long, carefully sourced video essay from Ahoy asking what counts as a video game and which one was truly first. It examines Tennis for Two, Spacewar, Pong, the Brown Box and a 1947 CRT device.

John Kitchin shows how Emacs org-mode with Python lets researchers combine narrative, math, figures and executable code in one document. It exports to LaTeX, HTML and PDF, and he used it for papers and e-books.

Dave Ackley gives a high-level introduction to robust-first computing, which prioritizes robustness over efficiency in computer architecture. A sorting demo illustrates the idea.

Aaron Boodman of Replicache asks why sync engines have not yet fixed web app complexity and what is missing for them to go mainstream. The talk lays out the ideas that led to the Zero sync engine.

Dave Ackley demonstrates the Demon Horde Sort, an inherently robust sorting machine running in his Movable Feast Machine simulator. This is the uncut version with all details and side thoughts.

Elasticsearch engineer and Lucene committer Adrien Grand explains the design decisions inside a Lucene index and what problems it can and cannot solve. The talk goes into how Lucene stores data for fast search and analytics.

Derek Sivers annotates a short clip of a lone dancer at a festival, showing how a first follower turns a ridiculous act into a movement. He draws out lessons about leadership and making it easy to follow.

CGP Grey explains how the 2015 UK general election showed the flaws of first-past-the-post voting, with parties like UKIP winning many votes but few seats.

Dave Ackley presents robust-first computing and the ULAM programming language for the Movable Feast Machine, a cellular-automata-like architecture. It was a short video for the Future Programming Workshop 2015.

A Startup School talk by YC partner and former Airbnb growth head Gustaf Alstromer on how startups get their first customers. It covers doing things that don't scale, founders learning sales, the sales funnel, and charging your first customer.

Sabine Hossenfelder reads a confidential email and uses it to explain her worries about academia and incentives in theoretical physics research. She ties it to her earlier Nature Physics comment on research quality.

A 92-minute RMIT University seminar in which Ken Stanley argues that setting an objective can block achieving it. He presents objective-less, novelty-driven search as an alternative approach to innovation and discovery, drawing on evolutionary computation.

Microsoft Research demonstrates holoportation, which reconstructs and compresses high-quality 3D models of people in real time and sends them anywhere. With a HoloLens, remote participants appear as if present in your room.

The famous ladder fight scene from Jackie Chan's First Strike (Police Story 4), an action sequence that won the Hong Kong Film Award for best action choreography.

The first video ever uploaded to YouTube, in April 2005. Co-founder Jawed Karim stands in front of the elephants at the San Diego Zoo for about 19 seconds.

A dramatization of a hypothetical Soviet first strike that destroys US bombers and Minuteman missiles, filmed with US Air Force cooperation. It is a short version of the 1979 documentary First Strike.

Disney Research presents Touche, a swept frequency capacitive sensing technique that recognizes complex hand and body configurations, and adds touch sensitivity to humans, liquids and everyday objects.

Disney Research's demo of quasistatic cavity resonance, which uses a purpose-built room or cabinet to generate magnetic fields that deliver kilowatts of power wirelessly to mobile receivers inside.

Episode 8 of the Fall of Civilizations podcast, a roughly two and a half hour history of the Sumerians. It covers their mysterious origins, invention of writing and mathematics, great early cities and eventual collapse, with myths, proverbs and recreated music.

Sped-up onboard camera footage of the Falcon 9 first stage landing on a drone ship during the THAICOM 8 mission on May 27, 2016. It shows the descent from grid fin deployment to touchdown.

Nature video showing MIT researchers flying the first plane with no moving parts, powered by an ion drive that creates an ionic wind from high-powered electrodes. The 5m-wide craft flies across a sports hall.

The BotHack NetHack bot wins the game for the first time with no cheats or human intervention, in a run lasting about 3.5 hours. The description links the source code and the dumplog.

A short Charlie Rose interview clip of Eric Schmidt discussing Google's direction for search. It is remembered for his remark that returning more than one result is a bug.

SpaceX footage of the Grasshopper vertical takeoff and landing test vehicle making its first roughly 6-foot hop in McGregor, Texas, on September 21, 2012. It was an early step toward a reusable Falcon 9 first stage.

Andres Gomez Emilsson of the Qualia Research Institute presents a model of DMT experiences using hyperbolic geometry and dynamical systems theory. He describes how different intoxication levels correspond to changing curvature and information content of experience.

A Microsoft Research demo from TechFest 2012 of a lab touch system that lets viewers feel the effect of different input latencies, down to about 1 ms. It shows how much more responsive dragging feels compared with typical 100 ms touch delay.

A Disney Research SIGGRAPH 2013 demo of an interactive system that lets non-experts design animated mechanical characters. The user sketches motion curves and the system generates optimized mechanisms and gear trains for 3D printing.

Microsoft Research's Rick Rashid demonstrates a speech recognition and translation system, built on deep neural networks, that turns his spoken English into Chinese speech in 2012.

Matt Cutts of Google explains what cloaking is: serving different content to search engine crawlers than to users. He covers why it violates Google's webmaster guidelines.

Toyota Research Institute presents an approach for teaching robots new dexterous behaviors from human demonstration. It explains why this capability matters and what advances made it possible.

Veritasium explains why a large share of published research findings may be false, covering p-values, p-hacking, publication bias and low replication rates. It draws on John Ioannidis's well-known paper and describes reforms such as preregistration.