train delays

David Kriesel's 36C3 talk, in German, analyzes a year of scraped data on every stop of every long-distance train in Germany. It shows how Deutsche Bahn delay statistics hide cancellations and delays.

Short 2006 footage of station staff in white gloves pushing commuters onto a packed morning train at a Tokyo station on the Toyoko Line.

Runar Bjarnason's Scala World talk argues that restraint and precision in components beat power and flexibility. Constraints on parts make them easier to compose into systems.

Doug McGuff presents the biochemistry behind high-intensity strength training and the paleo diet, including how the body stores and burns fat. It is a roughly hour-and-a-half full-length lecture.

John Oliver's Last Week Tonight segment on freight trains and railroads, covering how profit-driven practices undermine safety. It touches on longer trains and shrinking crews.

Donald Knuth explains at Stanford's CCRMA the constraint-based methods he is using to compose a major work for pipe organ.

A short clip from the 1983 BBC series Fun to Imagine in which Richard Feynman explains how a train stays on the track. He covers the geometry of tapered wheels that steer the train back toward the center of the rails.

A 37C3 talk on how a series of Polish electric trains stopped working after servicing by an independent company. The speakers explain how train control systems work and how they reverse-engineered the software lockouts.

A Wendover Productions explainer on why train tickets, especially Amtrak in the US, cost so much compared with flying. It breaks down staffing, speed and the cost components behind a ticket.

An episode of Gwynne Dyer's 1983 documentary series War, about how military basic training turns recruits into soldiers. It covers the psychological side of conditioning.

An MTA video on communications-based train control, the system meant to replace the New York City subway's century-old signaling. It also shows the mechanical interlocks and signals in use today.

Footage of FAA altitude chamber hypoxia training for pilots in which a participant passes out from oxygen deprivation. It shows how quickly and subtly cognition fails at altitude.

A short clip of Richard Feynman explaining how a train stays on its tracks, through the conical shape of wheels and how it handles curves without differentials.

A Ray Summit 2022 keynote fireside chat between OpenAI's Greg Brockman and Anyscale's Robert Nishihara. They discuss how OpenAI's training infrastructure evolved and its use of Ray.

Not Just Bikes explains why Swiss trains are considered among the best in Europe and the world, covering frequency, connections and what riding them is like.

David Kriesel's 36C3 talk, in an English translation, analyzes a year of scraped Deutsche Bahn data covering every stop of every long-distance train in Germany. It explores delays and how punctuality is actually measured.

Conan O'Brien interviews Jack White in a Serious Jibber-Jabber episode shot on 35mm film. They discuss White's creative process, his use of constraints and his approach to music and art.

Yosh trains a reinforcement learning agent to drive Trackmania until he can no longer beat it. The video explains how the training works and the design choices involved.

Rick Hartley gives a roughly two-hour live training on proper grounding in PCB design. He explains how energy actually flows in the space between conductors, and how that governs noise, EMI, return paths and signal reflections.

Andrej Karpathy gives a one-hour general-audience introduction to large language models, covering what they are, how they are trained, comparisons to operating systems, and security challenges such as jailbreaks.

Wendover Productions explains why US passenger rail lags behind other countries. It covers freight companies owning most of the track, geography and population density, and the economics of competing with flying.

A TV show about Ivan Sutherland's 1963 MIT thesis software Sketchpad, which ran on the TX-2 computer. It shows a light pen drawing, constraints, snapping, scaling and object-style graphics, foundations of GUIs and CAD.

Gerald Sussman's 2011 Strange Loop keynote argues we still do not know how to compute, comparing biological systems with how we program machines. It touches on propagators, constraint programming and robustness.

Earliest known footage of Ivan Sutherland's MIT PhD work, Sketchpad, the first computer graphics system, with commentary by Alan Kay. It shows light-pen drawing with constraints in a short clip.

Joseph White, creator of PICO-8, retraces the design of the fantasy console and how tools can shape and guide creative work. He discusses cozy, constrained design spaces and the influence of user-made cartridges.

Neural-network upscaled, 60 fps, stabilized and colorized version of 1902 footage of the Wuppertal Schwebebahn suspended railway in Germany. The source film comes from MoMA. It gives a vivid view of an early-1900s city and a train system that still runs.

A 1973 AT&T training film made for new employees at Bell Labs' Holmdel Computing Center, when Unix was in its third version and running at 16 computer centers in the Bell System. It shows how users submitted jobs and used the center's machines.

A one-minute clip from Tony Heller's channel in which a Black Lives Matter co-founder describes herself and a colleague as trained Marxists. It is a short political commentary clip.

A 1953 US Navy training film on the basic mechanisms in fire control computers: shafts, gears, cams and differentials. It shows how these mechanical parts compute ship and target firing solutions.

Andrej Karpathy's three-hour-plus general-audience deep dive into how ChatGPT-style LLMs are built, covering the full training stack from pretraining to post-training. It also gives mental models for their quirks, like hallucination, and how to use them well.

A 1930s Chevrolet training film explaining the principles and development of the differential gear. It builds the idea step by step from first principles to the finished mechanism.

In an Ars Technica War Stories episode, Prince of Persia creator Jordan Mechner describes how he made the game on the Apple II, fighting hardware memory limits and the platform's decline. It covers the rotoscoped animation and the engineering tricks involved.

Rick Beato argues that adults cannot develop true perfect pitch, which he ties to critical-period brain plasticity and language acquisition. He says it can only be developed in young children, and discusses the research behind this.

Robert Miles explains reward modelling, in which an AI learns what humans want from their preference comparisons instead of a hand-written reward function. He walks through the 2017 paper on deep reinforcement learning from human preferences.

Martin Donald explains the Wave Function Collapse algorithm using Sudoku-like constraint solving and shows how he implemented it with Blender and Godot. It links demos and reference articles.

A roughly 45-minute vintage US military instructional film that gives a comprehensive overview of celestial navigation, covering sextant use and the theory behind lines of position.

Andrej Karpathy walks through how GPT assistants are trained, from tokenization and pretraining to supervised finetuning and RLHF, and gives practical prompting strategies and a view of the tooling ecosystem.

The official tour video of Miniatur Wunderland in Hamburg, the world's largest model railway. It shows the 1,300 square meter layout with trains, aircraft, cars and ships moving around.

FortNine's tongue-in-cheek guide to why drivers fail to see motorcyclists and how riders can make themselves more visible. It touches on perception psychology, including the role of saccades.

Markus Triska tours Prolog's most distinctive features, including its use as a database and query language, rule processing, constraint solving and compile-time rewriting. It also covers concise meta-interpreters.