andrew lo

Peter Rizun and Andrew Stone present results of tests running 1 GB blocks on a Bitcoin test network at Scaling Bitcoin Stanford. The talk argues for big-block scaling and discusses its consequences.

Rich Hickey's talk at Clojure's tenth anniversary on the kind of programs Clojure is designed for. He argues for situated programs that deal with changing requirements, and for dynamic typing and data over static types.

Technology Connections explains why brown is not a spectral color but a context-dependent perception, essentially dark orange seen against brighter surroundings.

Michael Hendricks of PriceCharting shares tricks and pain points from running Prolog in production for 18 months at Strange Loop. It argues Prolog is a productive modern language beyond logic puzzles, and includes a demo of changing code mid-execution.

Rich Hickey's long presentation on Clojure and concurrency covers locking and immutability, then goes in depth on refs, transactions and agents. It ends with a multithreaded ant colony simulation demo.

Jay Parlar's Strange Loop talk shows how model checkers such as Alloy can find complex bugs in a system's design without running or reading any code. He walks through modeling architectures and checking every possible sequence of operations, including a real security bug and a UI feature-interaction bug.

The Lock Picking Lawyer tests the supposedly unpickable lock designs built by the Stuff Made Here channel. He looks for bypasses and weaknesses in the novel anti-picking mechanisms.

Derek Slager's Clojure/conj talk argues that ClojureScript is a pragmatic choice for web development. He addresses common objections, recent improvements, tooling and use cases where it shines.

Bruce Hauman presents Figwheel, a ClojureScript tool for live, interactive development with hot code reloading. He explains the main ideas, demonstrates how it works, and shares tricks for getting the most out of it.

A video essay explaining hauntology, Mark Fisher's idea of lost futures, and 80s nostalgia. It uses the Fallout games and other media as examples of a retro-futurism that mourns futures that never arrived.

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.

Technology Connections explains the early history of analog color television, from the 1954 start of modern color broadcasting, and how shadow masks work in CRTs. It is the first in a series on how analog color TV works.

A roughly 40-minute Mahalo mentor interview with Elon Musk, covering his background from Zip2 and PayPal to SpaceX, Tesla and SolarCity, along with advice for entrepreneurs.

A LockPickingLawyer video in which a locksmith claims his videos are fake and challenges him; he responds by picking the lock. It is a short, typical LPL demonstration.

A Primitive Technology episode in which the creator builds a bow-drill-driven bark fan to blow air into a fire, using only natural materials. It shows the progression from fanning a fire by hand to a rotary forge blower.

Technology Connections takes apart the step-by-step electromechanical logic of a 1970s pinball machine. He shows how relays, steppers and switches track state and score without electronics.

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.

Dragan Djuric presents Clojure libraries for GPU and numerical computing, including ClojureCL, ClojureCUDA and Neanderthal. He shows how a dynamic REPL workflow can be combined with low-level hardware acceleration for machine learning and data science.

Chris Lattner and Brennan Saeta present Swift for TensorFlow at the TensorFlow Dev Summit 2019, covering language-integrated automatic differentiation and tooling for machine learning in Swift.

A French-language documentary on the history of Prolog, created in Marseille by Alain Colmerauer in the early 1970s, with interviews of many people involved. It traces the origins of logic programming and later developments of the language.

LockPickingLawyer cuts through a LiteLok flexible bike lock with cable cutters in about 16 seconds, one of several videos defeating the product.

Anthony Marcar describes lessons from three years of using Clojure at WalmartLabs, including scaling a team and a large multi-project codebase in an enterprise setting.

A Strange Loop talk presenting an open-source library that integrates Clojure into the Unity 3D game engine. It covers REPL-based live coding, macros, DSLs and persistent data structures for game development.

Rafal Dittwald's Clojure/north talk shows how to move from writing Java-style code in Clojure to thinking in data-driven, functional terms. He walks through a JavaScript example, refactoring imperative code step by step into a functional core.

Stuart Halloway of Cognitect argues for debugging with the scientific method: form hypotheses, try to falsify them, and write everything down. The talk is given to the Clojure community but applies to any language.

Zach Oakes explains why Clojure suits making games at runtime, so designers can experience their work as they build it. He combines abstract discussion with live demonstrations, drawing on his play-clj library and Nightmod tool.

Paul Irish and Pavel Feldman present the newest Chrome Dev Tools features at Google I/O 2011, including live CSS editing, saving changes, breakpoints and network analysis. It also covers remote debugging.

Stuart Halloway introduces REBL, a graphical, interactive tool for browsing Clojure data, extracted from Datomic tools. The talk is from Clojure/conj 2018.

The Slow Mo Guys film a TV and screens with a high-speed camera to show how displays build an image. The footage includes CRT-style scanning and how pixels light up over time.

Stuart Halloway shows how Clojure's spec library lets you build programs that are both agile and robust. He covers declarative, predicate-based specification layered on interactive REPL development.

Dave Jones of EEVblog tears down a Kollsman MD-1 Automatic Astro Compass, a mechanical analog computer from a B-52 bomber. It is part of a star-tracker inertial navigation system that computes altitude and azimuth.

A two-minute Microsoft ad for Internet Explorer 10 in which a karaoke-style song addresses people who hate the browser. It is part of the "browser you loved to hate" campaign.

An F8 2015 talk touring the tool-chain Facebook uses to let thousands of engineers build mobile apps, including its move to Mercurial, an Atom-based IDE and continuous integration.

Rich Hickey presents an extensive introduction to Clojure at the Boston Lisp meeting, assuming prior Lisp knowledge. It covers the language's design decisions relative to other Lisps.

CNLohr explains how he made an ESP32 produce valid LoRa packets without a LoRa radio, using aliasing and clever signal tricks. It walks through the RF math and shows how far the signals reach.

Louis Rossmann reacts to lobbyist ads in the Massachusetts right-to-repair ballot fight that suggest repair access would enable domestic abuse and discrimination, and urges support for the campaign.

LockPickingLawyer picks an Amazon's Choice 'high security' padlock in about two seconds.

A short 1999 documentary clip about millionaires featuring a young Elon Musk, including footage of him taking delivery of an expensive car.

The day 2 keynote at Google Cloud Next '17, announcing new GCP and G Suite products with demos and customer stories from Google leaders.

Philip Roberts explains the JavaScript event loop, call stack, callbacks and asynchronous behavior with live visualizations using a tool he built. It demystifies terms like non-blocking and single-threaded.