condition restarts

Chris Houser's Clojure/conj talk on why Clojure's exceptions destroy information as the stack unwinds, unlike Common Lisp's condition system, which can resume from the error site. He surveys the existing libraries that approximate conditions, explains why they don't compose with each other, and considers what a better design would look like.

Technology Connections explains why single-hose portable air conditioners are inefficient and often a poor choice compared with window units. It details how the single hose pulls in warm outside air and wastes energy.

Tech Ingredients builds a larger solar-powered desiccant air conditioner that uses a calcium chloride liquid desiccant with evaporative cooling to cool their lab. The video includes the engineering calculations.

Peter Seibel's 2006 Google TechTalk on Practical Common Lisp, framed by the Sapir-Whorf hypothesis and Paul Graham's Blub paradox. It shows Lisp features such as condition restarts and its generic-function object system.

An Extra Credits episode on how games use Skinner box operant conditioning and reward schedules to keep players playing and spending. It argues for more immersive design mechanics than simple reward loops.

Michael Feathers' GOTO Chicago 2018 talk on reducing error checks and conditional logic in code. He offers a framework for handling errors and decisions at the level of code and architecture.

A clip of Yanis Varoufakis answering a question about China versus the EU on debt conditions. He contrasts Chinese non-interventionist lending with EU conditionality, drawing on the Piraeus port.

A This Old House segment where Richard Trethewey installs a heat exchanger that uses waste heat from a central air conditioner to heat a swimming pool.

Tech Ingredients shows how to build a liquid panel with a specialty paint that, placed outside, cools below ambient air temperature. It demonstrates radiative sky cooling.

A look at how granite surface plates are inspected, calibrated and reconditioned using an autocollimator, a repeat meter and diamond-charged cast iron laps. Measurements are at the level of millionths of an inch.

Jonathan Blow's 2010 Rice University talk argues that game designers refine their techniques in ways that can manipulate players, as with A/B-tested social games. He discusses the ethical responsibility of designers and what games can offer beyond addiction.

NightHawkInLight shows how to make ultra-white radiative paint that cools surfaces below ambient temperature without electricity. He walks through the research papers and the household-materials process.

Misko Hevery's Clean Code Talk shows how to use object-oriented techniques such as polymorphism to remove repeated if and switch statements. The result is code that is easier to test, understand and maintain.

An NFB documentary about the shipbreaking yards of Alang, India, where about 40,000 people dismantle huge ships by hand in dangerous conditions.

A VICE News segment following Uber driver Terri White, who drives 83 miles from Stockton to San Francisco and sleeps in her car between rush hours. It looks at the conditions of gig-economy drivers.

Motherboard's 2014 visit to a secretive Bitcoin mining operation in a repurposed factory in Liaoning, China, one of six sites producing about 4,050 bitcoins a month. It shows the machines and the workers' living conditions.

A five-minute demo of the Common Lisp debugger fixing a bug, recompiling a single function, and resuming execution from the failed stack frame. It shows how to avoid re-running long computations.

A 2018 local news report showing people using drugs openly in the corridors of San Francisco's Civic Center BART station.

A South Park clip in which Butters' dad takes a job at an Amazon fulfillment center to make ends meet. It satirizes warehouse work conditions.

Sandi Metz takes an ugly section of conditional code and refactors it into a few simple objects, bridging object-oriented theory and practice. The talk includes her take on the Gilded Rose refactoring kata and the idea that duplication is cheaper than the wrong abstraction.

Technology Connections explains how heat pumps work as reversed air conditioners and why they can deliver several times the heat of resistive heating per unit of energy. It also tackles common myths such as poor cold-weather performance.

Dominion is a two-hour documentary using drones and hidden cameras to expose conditions in animal agriculture, including food, clothing, entertainment and research. It questions humanity's dominion over animals.

Psychologist Melanie Joy's TEDxMunchen talk introduces carnism, the invisible belief system that conditions people to eat some animals but not others, and how it shapes reactions to food choices.

PBS Space Time explains Noether's theorem: conservation laws such as energy and momentum are consequences of deeper symmetries. It also covers why those laws hold only under certain conditions.

Climber Chris Warner talks at Google about his book on high altitude leadership and the 2007 K2 expedition, where eighteen climbers summited and two died.

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.

Hillel Wayne's Strange Loop talk introducing TLA+ as a specification language for finding concurrency bugs in designs. It covers stalling, race conditions and dropped messages, with PlusCal examples.

Tim Dodd's hour-long deep dive on how rocket engines start, from solid motors to liquid engines. It covers thermal conditioning, spin-up, ignition methods, starting in space, and a step-by-step RS-25 startup.

A short cartoon explaining how language models like ChatGPT work, from autocomplete and conditional probabilities to neural networks, gradient descent and backpropagation. It shows how networks act as universal function approximators.

A Kurzgesagt video on the conditions in which most farm animals are raised. It argues that cruelty is for cheaper rather than better meat, and that a small price increase per meal could avoid most of the suffering.

Dan Britt lectures on the history of climate, covering orbital cycles, ice ages and conditions millions of years ago. It frames current climate debate with deep-time context.

A DEF CON 24 talk on how a cyber mercenary group could forge identities and create the conditions for overthrowing a government. It is entertainingly outlandish and includes a drone-mounted saw for cutting power lines.

A KOMO News documentary about Seattle's homelessness, addiction and street crime. It examines the City Council's policies, shows conditions on the streets and the impact on local businesses, and explores possible solutions.

Social psychologist Melanie Joy introduces the concept of carnism, the belief system that conditions people to eat some animals but not others.

Stanford's Christopher Gardner presents his large, long comparison of four popular diets under real-world conditions, in which the lowest-carbohydrate Atkins diet came out on top.

A documentary on Clive Wearing, a renowned musician whose brain was damaged by a virus in 1985, leaving him with a memory spanning only about seven seconds. It follows his life and condition.

The official trailer for The True Cost, a documentary on the fast fashion industry and who pays for cheap clothing. It touches on garment worker conditions and the Rana Plaza collapse.

A 2019 BBC News report by John Sudworth, who was given rare access to the secure facilities in Xinjiang where more than a million Muslims are thought to be held. Authorities call them training schools, and the report examines what the visit reveals about the system and conditions inside.

John Oliver's Last Week Tonight segment covers the working conditions of US air traffic controllers and the understaffing, outdated equipment (including floppy disks) and funding structure of the FAA. It mixes comedy with policy criticism.

BigClive tears down a heated electric shower head of the type common in some countries, often called a suicide shower. He examines the construction and the dangerous fault conditions, such as poor insulation and missing earthing.