jan koum

A Startup School SV 2014 conversation between Sequoia's Jim Goetz and WhatsApp founder Jan Koum. They discuss how Sequoia pursued WhatsApp, its tiny engineering team, and how it handled growth and support.

Cal Henderson's DjangoCon 2008 keynote, "Why I Hate Django", is a funny critique of Django from a Flickr architect. It touches on scaling topics such as database replication.

A Telegraph news clip showing newly revealed footage from the January 6 Capitol attack, with rioters overwhelming police. It accompanies coverage of the congressional committee's televised hearing.

David Guillot describes how his team replaced a two-year-old React UI of their SaaS product with Django templates and htmx in a couple of months. The talk gives concrete indicators on code size, performance and team impact.

Jean-Marc Jancovici gives an MIT Media Lab talk on whether technology can save us from climate change. He argues from a physical view of energy that economic growth, energy use and climate impact are tightly linked.

Part 1 of Jean-Marc Jancovici's 2019 course at Ecole des Mines de Paris, on energy and its central role in the economy and climate. It is in French with English subtitles available and runs about two and a half hours.

Mathologer examines how identities like 1+2+3+... = -1/12 arise in Ramanujan's work, starting from his 1913 letter to Hardy. The video explains the rules for summing infinite series and why such results are meaningful but not naive sums.

A short episode highlight from NBC's The Good Place in which Eleanor and Chidi try to terminate Janet, the all-knowing assistant, who begs for her life. It is a comedic clip about an AI with a self-preservation reflex.

Jean-Marc Jancovici lectures at ENS Paris on whether energy use, jobs and growth can all be preserved. He argues for a physical approach to economics, since resource depletion and climate limits make perpetual GDP growth unrealistic.

jan Misali traces the history of the letter W, including why it is called double u. The video is part of a series of deep dives into individual letters.

Theo Jansen shows many of his Strandbeests, wind-powered walking kinetic sculptures, set to Khachaturian's Spartacus. It presents his work since 1990 on creating new forms of life on beaches.

A short vintage clip introducing Microsoft Excel in 1990, widely known for its elevator-themed commercial. It shows how spreadsheet software was pitched in that era.

Vlambeer's Jan Willem Nijman shows how to make an action game feel great by stacking small effects like screenshake, recoil and particles onto a basic shooter. It was presented at INDIGO Classes 2013.

A presentation by Janice Stanger arguing that protein is overhyped and that excess or the wrong kinds of protein are harmful. It promotes a whole-foods, plant-based diet.

Thai farmer Jon Jandai talks about leaving Bangkok to farm and build his own house, arguing that food, shelter, clothing and medicine are easy to provide and that modern life is made needlessly complicated. He founded the Pun Pun Center for Self-reliance.

Jan Vitek of Northeastern University gives a meetup talk on the challenges of making the R language run fast. He explains what in R's semantics makes it hard to optimize and to build a JIT compiler for.

Drone footage over Tesla's Fremont factory in January 2021 that captures a Gigapress die-casting machine in operation.

BobbyBroccoli's first of three parts on Jan Hendrik Schon, the Bell Labs postdoc whose fabricated organic semiconductor results nearly won a Nobel Prize. It covers his rise and the context around Bell Labs.

Symbolics developer Kalman Reti gives a short introductory demo of a Symbolics Lisp Machine running Genera in an emulator. It shows the context-aware command line, typed on-screen objects, and the live-editable system, including swapping in a C-compiled JPEG decoder.

Yaron Minsky of Jane Street shows how the OCaml Incremental library lets trading UIs express data transformations that are easy to read and efficient on streaming data. It includes a live table demo.

Lex Fridman interviews Instagram co-founder and former CEO Kevin Systrom about building the product, its early days and its pivot story.

A Remedy engineer explains how Alan Wake 2 moved to a GPU-driven rendering pipeline built on mesh shaders, culling and rendering meshlets for dense vegetation on PS5 and Xbox Series consoles.

Yaron Minsky explains how Jane Street moved from mainstream languages to developing almost entirely in OCaml. He covers trading systems, research infrastructure, tooling and hiring.

A University of Tokyo demo of a rock-paper-scissors robot that always wins, using high-speed vision to read the human hand and respond faster than people can perceive.

Fully Charged visits Janus Trucks in New South Wales, Australia, which converts diesel trucks to electric with swappable battery packs. The truck carries 620 kWh of batteries and a 540 kW drive.

Vegan advocate Erin Janus explains the dairy industry in about five minutes, covering how milk is produced and the treatment of cows and calves. It is an advocacy piece and includes graphic material.

jan Misali presents an humorous but earnest case for counting in base 6 (seximal) instead of base 10 or 12, comparing the arithmetic advantages of each.

An episode of jan Misali's Conlang Critic series reviewing Toki Pona, a minimalist constructed language with about a hundred words. It is a short, humorous critique of the language's design.

Yaron Minsky of Jane Street gave this talk to Harvard's OCaml-based CS51 class in 2010. It collects advice on being an effective ML programmer in an industrial setting.

Mathologer examines the infamous Numberphile claim that 1+2+3+... equals -1/12, explaining what is wrong with the calculation and how it connects to real math like the zeta function and analytic continuation.

A Numberphile video in which physicists Tony Padilla and Ed Copeland show a seemingly astounding result that 1+2+3+4+... equals -1/12. The argument is informal and has drawn criticism for glossing over what the result actually means.

Charlie Marsh of Astral explains how uv, a Rust Python package manager, got so fast. He covers allocators, concurrency, zero-copy tricks and the challenges of Python packaging.

Retired Major Brian Shul tells the story of a ground speed check with LA Center while flying the SR-71 Blackbird. He recounts it live at the Hiller Aviation Museum.

A 256-byte MS-DOS intro that renders a raymarched, procedural 3D animation. It won the 256-byte competition at Riverwash 2009 and the scene.org award for best technical achievement that year, and the author published commented x86 assembly source.

A demo of the Cubli, a 15 cm cube that uses reaction wheels to jump up onto a corner, balance there and fall in a controlled way to move. The video shows these three abilities chained into locomotion.

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 That Mitchell and Webb Look sketch in which a hospital A&E is staffed by homeopaths who dilute everything, leaving patients with nothing.

Reddit co-founder Alexis Ohanian responds in a short interview to Anderson Cooper's on-air criticism of Reddit over child exploitation content.

A one-minute clip of Steve Ballmer explaining IBM's obsession with counting thousands of lines of code (KLOCs) as a measure of programmers. He explains why that metric is useless.

Captain Disillusion's VFXcool episode, led by Alan Melikdjanian, takes a 41-minute nostalgic look at how the visual effects of Flight of the Navigator were made. It covers early computers, motion control, in-camera effects and practical crafts.