rap battle

An Epic Rap Battles of History episode in which Albert Einstein and Stephen Hawking trade rap verses. It is a popular comedic music video.

A hip-hop music video from EconStories in which Keynes and Hayek rap-battle over how to handle recessions and government spending. It is the second round after the first rap battle.

A rap battle in which John Maynard Keynes and F. A. Hayek debate the causes of boom and bust, stimulus, and bailouts. It was produced by Econstories to teach the two schools of thought.

Jason Cohen's MicroConf talk on designing a bootstrapped business by starting from your own strengths, goals and constraints. He works backward to the business model, pricing, market and product that fit, with practical points like annual prepay and pricing tiers.

A Google Tech Talk by Steve Weis that introduces modern cryptography and its use in practice and at Google. It covers proofs of security and security definitions and a special topic. HN commenters treat it as a talk on verifiable electronic voting.

The first lecture in an 18-part series on digital photography from Marc Levoy's Stanford CS 178 course, recorded at Google in 2016. The series covers how digital cameras work and computational photography, with slides and assignments available on the course site.

Branch Education's animated deep dive into ASML's EUV photolithography machine and how it prints nanometer-scale transistors onto chips. It covers the system's components and the process of chip manufacturing.

Redis Labs and Tim Davis present RedisGraph, which uses GraphBLAS to treat graph queries in Cypher as sparse linear algebra for lower latency.

The Thought Emporium's update on the home-brewed gene therapy he took to cure his lactose intolerance. It reports how the effect held up over two years and what future versions might look like.

Rhonda Patrick of FoundMyFitness makes a case for isothiocyanates such as sulforaphane from cruciferous vegetables and broccoli sprouts. It covers cancer, aging, heart disease, brain and behavior, and neurodegeneration, with chapter timestamps.

A PBS Space Time episode explaining the holographic principle: the idea that our 3+1 dimensional universe may be described by information on a lower-dimensional boundary. It walks through black hole entropy and the AdS/CFT correspondence.

A documentary on how GraphQL came to be at Facebook, featuring its co-creators Lee Byron, Dan Schafer and Nick Schrock. It covers the problems it solved and its adoption at companies like Twitter, Airbnb and GitHub.

PolyMatter's first part of a series on China's demographic collapse, covering the effects of the one-child policy, shrinking workforce and economic consequences.

A kinetic typography animation for Jonathan Coulton's song 'Shop Vac', made by Jarrett Heather with Illustrator, After Effects and other tools over 500-1000 hours.

Louis Rossmann explains why he stopped using GrapheneOS, describing his interactions with its lead developer Daniel Micay. It includes chat logs shown in the video.

Ben Krasnow of Applied Science uses an antique 4x5 view camera to make high-resolution photolithography masks in a home shop. He photographs a poster-sized printout onto litho film to get features around 20 microns.

The SIGGRAPH 2005 demo of dual photography from Stanford, which swaps the roles of projector and camera to render a scene from the light's point of view. It includes the reveal of a hidden playing card.

Vox breaks down how great rappers build rhymes, from Kurtis Blow's simple bars to Biggie's smooth flow and Kendrick Lamar's dense, fast delivery. It uses on-screen visualizations of rhyme structure.

Scott Arciszewski's DEF CON 26 Crypto and Privacy Village talk critiquing the JOSE standards (JWT, JWS, JWE) and showing how to design cryptographic tokens more safely.

Rap Genius founders appear at TechCrunch Disrupt NY 2013 for a joke-filled interview announcing News Genius, with little detail about what it is.

ContraPoints' 35-minute video essay on incels, examining the community, its worldview and how people get radicalized. It is delivered with theatrical style and an empathetic tone.

A roughly 90-minute video essay by ContraPoints on J.K. Rowling and the controversy around her views on gender. It examines why many LGBTQ people and allies soured on her.

ContraPoints' long-form video response to Jordan Peterson, critiquing his ideas including his use of the term postmodern neo-Marxism. It is delivered in her theatrical essay style.

A clip from Battlestar Galactica season 4 in which a character declares 'I'm a machine' and laments the limits of human senses.

A SIGGRAPH 2019 course on geometric algebra. Charles Gunn gives an intro, then Steven De Keninck gives a programmer-focused course with live examples in ganja.js.

Everyday Astronaut explains the basic physics of rocket engines, the main engine cycles and fuel types, then compares SpaceX's methane-fueled full-flow staged combustion Raptor to other engines. It runs nearly 50 minutes with chapter markers.

A demo of the Symbolics Graphics Division's S-Packages, a Lisp-based 3D color graphics and animation system from the 1980s. It was later used in developing for the Nintendo 64.

Jafar Husain's ACM keynote presents Netflix's JSON Graph and Falcor, which let web developers treat all cloud data as one virtual JSON model. It combines reactive programming with REST principles.

Alexander Nix of Cambridge Analytica presents at the 2016 Concordia Summit on using big data, psychographic profiling and behavioral microtargeting in elections.

A Clojure/conj 2019 talk by Wilker Silva on how namespace-qualified keywords and context-free federated names can be used pragmatically for data modeling, drawn from his experience at Nubank. It builds toward a graph-based view of connecting data from many sources.

Neurologist Dr. Matthew Phillips talks at Low Carb Gold Coast 2022 about fasting and ketogenic diets as therapies for cancer and neurodegenerative disease. He focuses on mitochondrial dysfunction and brain energy metabolism.

Tim Dodd of Everyday Astronaut gets a close-up walkthrough of SpaceX's Raptor 2 engine from Elon Musk at Starbase. They cover how Raptor 2 was simplified and upgraded relative to Raptor 1, including cooling and thrust vectoring details.

Modern Vintage Gamer explains why PlayStation 1 graphics warped and jittered, comparing it with the Nintendo 64. The causes are affine texture mapping and the lack of sub-pixel vertex precision.

A long Techlore video documenting what it presents as hostile conduct by GrapheneOS leadership and community members, including lead developer Daniel Micay, toward CalyxOS and others.

LegalEagle analyzes Katko v. Briney, the Iowa case about a homeowner whose shotgun booby trap injured a burglar, and the limits on deadly force in defending property.

David Heinemeier Hansson's talk at Startup School 2008 on building a profitable startup. He argues for bootstrapping and small, well-run companies instead of chasing investment and exits.

A short explainer on the history and mechanics of public key cryptography and the Diffie-Hellman key exchange. It uses a mixing-paint-colors analogy to show how two parties can agree on a shared secret in public.

Dr. Jason Fung, a nephrologist, explains therapeutic fasting as a treatment for obesity and type 2 diabetes. He frames it around the two-compartment problem of fat storage and insulin resistance.

The Thought Emporium's host describes making and taking a DIY gene therapy to treat his own lactose intolerance. It uses an AAV virus to deliver DNA coding for the lactose-digesting enzyme, made with biohacker Gabriel Licina's help.

A kinetic typography animation set to Stephen Fry's spoken essay on language. Fry argues against grammar pedantry and for the way language evolves, including the verbing of nouns.