total internal reflection

Technology Connections explains how automatic windshield wiper rain sensors work, using an infrared light source and total internal reflection in the glass.

Armin Ronacher, creator of Flask, explains how CPython's internals and C API leak into the language's semantics. Using examples like the complexity of the add operation, he shows why Python is hard to optimize or reimplement.

A student interviews Kirsten Carlson, who does not have an internal monologue, and she answers questions about how she thinks. The video grew out of a viral article about people lacking inner speech.

Dan Bornstein's Google I/O 2008 talk on the internals of Dalvik, the virtual machine that runs Android code. It covers the motivation for its design, the dex format and its register-based interpreter, plus tips for writing code that suits the platform.

Pannenkoek2012's commentated tool-assisted Super Mario 64 run collecting the Watch for Rolling Rocks star with half an A press, using parallel universes and QPU movement. The video is marked outdated in favor of a newer version.

At CppCon 2017 Herb Sutter presents his work on evolving C++ through compile-time code generation, including metaclasses and reflection. The aim is to make the language both more powerful and simpler by letting programmers express intent directly.

Big Clive does a complete teardown of a lithium phone battery, taking apart the protection circuit, case and the cell itself. He notes it was risky because the cell was not discharged first.

Episode 7 of the Inside Koenigsegg series, where Christian von Koenigsegg demonstrates the camless Free Valve engine technology. It discusses how such innovation could affect the wider auto industry.

An AP clip from the July 2018 NATO breakfast in Brussels in which Donald Trump says a gas pipeline leaves Germany totally controlled by and captive to Russia.

Leaked internal Google X video, 'The Selfish Ledger', a speculative thought experiment about treating user data as a ledger that could guide and shape human behavior, including products sold to fill data gaps.

Totally Gridbag is a short humorous animation about the frustrations of Java Swing's GridBagLayout, originally made as a Flash cartoon.

A short clip of German diplomats laughing at the UN in 2018 as Trump warns that Germany will become totally dependent on Russian energy.

A short CNBC clip from 2018 in which President Trump criticizes Germany for paying billions of dollars to Russia for energy, saying Germany is 'totally controlled' by Russia. It comes from a NATO summit news segment.

A Bell Labs film in which Dr. J.N. Shive uses a mechanical wave machine to demonstrate reflection, standing waves, resonance and impedance matching. He includes some equations but relies mostly on real-world examples a layperson can follow.

Python core developer Raymond Hettinger explains how Python's dictionary implementation evolved into the compact, ordered dict in Python 3.6. He uses pictures and small bits of pure Python, and covers key-sharing, compaction and versioning.

A Linux.conf.au 2013 talk that explains git's internal model using a playful, toy-based approach. It presents git operations as operations on a graph of commits, aimed at people who find git confusing.

Engineering Explained examines Toyota's hydrogen-burning V8 engine built with Yamaha and explains the practical problems of hydrogen combustion vehicles. It covers efficiency, storage and distribution issues.

Smarter Every Day films Prince Rupert's drops, tempered glass drops, in high-speed slow motion at 130,000 fps. It shows how the drop's heavy internal stress lets the head survive hits while the tail shatters the whole thing.

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.

Mark Rober digs into bed bugs, testing popular beliefs about where they come from and how to get rid of them. It mixes entertaining experiments with research-based advice on what works and what does not.

Jayson E. Street's DEF CON 19 talk shows photos from real security engagements where he was already inside client facilities, illustrating how social engineering and physical intrusion can cause huge losses. For each attack he also explains what defenses would have stopped him.

Christopher Domas's DEF CON 26 talk on secret processor registers that vendors reserve for third parties holding trusted keys. He examines how users are locked out of parts of their own CPUs.

SoundHound's CEO demos Hound, a voice assistant, handling fast compound natural language queries with context and detailed criteria. The video leaked before the product's official launch.

An AWS re:Invent 2018 session in which Holly Mesrobian and Marc Brooker explain how AWS Lambda is built, including its sandboxing, isolation and scaling architecture. It covers what happens under the hood when serverless code runs.

Mike Wallace interviews Aldous Huxley in 1958 about the warnings in Brave New World, including mass persuasion, overpopulation and voluntary totalitarianism.

Gabe Newell, founder of Valve, gives a talk at the LBJ School on productivity, economics, political institutions and the future of corporations. He discusses Valve's hiring and pay, its flat structure and an open-office anecdote.

An AWS re:Invent 2018 session on how DynamoDB was built as a hyper-scale NoSQL database. It discloses underpinnings of the service and how it is run for over 100,000 customers.

Additional camera angles of the 1988 Sandia National Laboratories rocket-sled test in which an F-4 Phantom was crashed at about 500 mph into a block of reinforced concrete. The footage shows the aircraft disintegrating against the wall.

Allan Blomquist demonstrates the internal programming and debugging tools Tomorrow Corporation uses to make games, including live modification of a running game and time-travel debugging.

Cliff Click of Azul Systems asks what a JVM is supposed to do, in a Google Tech Talk from 2011. He covers the services a JVM provides, such as garbage collection and compilation, and the messy reality beneath the abstractions.

An excerpt from the 1983 BBC series Fun to Imagine in which Richard Feynman describes how he and a mathematician friend counted in their heads in different ways, one verbally and one visually. It shows that people can reach the same goal through quite different mental methods.

Liz Rice builds a container from scratch in about 100 lines of Go, showing that a container is not a lightweight VM but a set of Linux kernel features and flags.

The first 3.5 hours of Tony Alicea's Udemy course on JavaScript's inner workings, covering topics such as first-class functions, closures, prototypal inheritance and how the language behaves under the hood.

Steve Yegge's Stanford seminar on GROK, Google's internal large-scale, cross-language source code analysis system. It covers how the system helps with code search and understanding across Google's huge codebase.

A BSD Now episode featuring a long interview with Joyent CTO Bryan Cantrill on dtrace, ZFS, pkgsrc, containers and more. It includes his rant on why Linux epoll is flawed and stories from Sun.

Scott Chacon introduces Git by showing what happens under the hood for basic commands: staging, committing, data storage, branching, merging and pushing. He contrasts it with Subversion and shows history viewing with log.

David Beazley's workshop screencast builds asynchronous programming in Python from scratch, starting from callbacks and continuations and replacing threads to show how concurrency works underneath.

A DEF CON 21 talk by Karl Koscher and Eric Butler on how SIM cards work, including Java Card applets, the SIM toolkit and the OS running on the card. It shows how much control the network and the card have independent of the phone.

Valve opens up a Steam Deck to show its internal components and explain which are replaceable or upgradable. It advises against self-repair but shares the details openly.

Hobbyist Wesley Kagan shows his Miata running and driving with a homemade version of Koenigsegg's freevalve camless valve technology. The build uses open CAD files and code and he describes it as an ongoing work in progress.