led longevity

Veritasium tells the story of how Shuji Nakamura and others made the blue LED, long thought nearly impossible. It covers the materials challenge of gallium nitride and the persistence it took.

Technology Connections complains about the harsh, overly blue color of modern LED Christmas lights and tries more fixes for them. It follows earlier videos by the same creator on holiday lighting.

Big Clive tears down the Dubai lamp, a Philips LED bulb developed with Dubai's ruler for maximum efficiency and long life. He examines its construction and circuitry, including underrun LEDs and many filament strips.

Rhonda Patrick interviews Dr. Bill Harris, co-inventor of the Omega-3 Index and author of more than 300 papers on fatty acids. They cover EPA and DHA dosing, fish oil studies such as REDUCE-IT, and how omega-3 levels relate to health and longevity.

WIRED has UCLA professor Amit Sahai explain zero-knowledge proofs to a child, a teen, a college student, a grad student and an expert. Each round goes deeper into the cryptography and why it matters.

ILM shows how The Mandalorian season one used a large curved LED wall to display interactive 3D environments in camera. The video covers the virtual production setup replacing location shoots.

Insider explains how The Mandalorian replaced green screens with LED walls that project real-time 3D environments behind actors, with over half the show filmed on such virtual sets.

Tom Scott races a London black-cab driver who has memorized The Knowledge against a phone GPS across the city, comparing local expertise to navigation software.

Wendover Productions explains how UK rail privatization worked and why it failed. It covers the fragmented operator and infrastructure structure and why market forces apply poorly to rail.

Thunderf00t critiques Starlink's economics and technical claims alongside other unfulfilled Musk promises. It argues Starlink is a poor business.

A ten-minute clip from Jonathan Blow's talk on preventing the collapse of civilization, arguing that software quality and the knowledge to build it are in decline.

An Asianometry explainer on why the Soviet Union, once a leading computing power, fell far behind the US in computers by the 1980s. It traces the gap from the 1960s onward despite strong state support for science.

Out of Spec Reviews takes a one-hour drive in an Avatr 11 running Huawei's Qiankun ADS 3.2 driver assistance system in China, billed as the best FSD-like system there.

LockPickingLawyer examines a challenge involving a tamper-sealed Abus lock and shows how the tamper seal can be defeated.

Andrej Karpathy's first Neural Networks: Zero to Hero lecture, which builds micrograd, a tiny autograd engine, from scratch in Python. It explains backpropagation and neural network training step by step, assuming only basic Python and some high-school calculus.

Andrej Karpathy builds a GPT from scratch in code, following Attention Is All You Need and GPT-2/3, in about two hours using PyTorch. He connects it to ChatGPT and assumes familiarity with his earlier makemore videos.

DIY Perks builds a realistic artificial sun for dark winters, using a powerful water-cooled LED, a satellite dish reflector for near-parallel rays, and a scattering layer to mimic the blue sky. The video explains the optics behind why most lamps do not look like sunlight and shows the build and its results.

Veritasium tells the story of Thomas Midgley Jr., who introduced leaded gasoline and CFCs, and covers the science behind lead exposure and ozone damage. It also touches on isotope geochemistry used to uncover the history.

A long Technology Connections video arguing that public understanding of renewable energy is distorted. It covers solar economics, land use compared with ethanol corn, and battery myths such as cobalt.

A maker's time-lapse of building a working computer inside a LEGO-style brick, using a tiny 0.42-inch OLED screen, with a demo at the end.

FortNine explains how Harley-Davidson ended up in decline, from a narrow lifestyle niche and an aging customer base to the pandemic hitting a company already in trouble.

Technology Connections explains why American cars all had the same standardized sealed-beam headlights until 1957. It covers the regulations behind the design and the effect on night visibility.

Medlife Crisis asks whether academic research should sit behind paywalls, covering publisher profit margins, unpaid reviewers, Sci-Hub and Aaron Swartz. It includes an interview with Sci-Hub founder Alexandra Elbakyan.

Not Just Bikes argues that oversized American fire trucks and fire department requirements push cities toward wide roads and dangerous street design. He compares this with the Dutch approach to emergency response.

A Kurzgesagt animation about how the immune system constantly detects and kills cells that are turning cancerous. It explains what cancer cells are and why stopping them is so hard.

Andrej Karpathy builds a bigram character-level language model from scratch, introducing torch.Tensor and the framework of training, sampling and loss evaluation. It is the first step toward a GPT-style Transformer in his makemore series.

Channel 4 News reports on undercover Greenpeace footage of an ExxonMobil lobbyist describing efforts to weaken climate legislation. Exxon disputes the claims.

Linus Tech Tips covers Intel's CES 2024 demos, focusing on Thunderbolt Share and Wi-Fi 7 improvements.

Munro Live's team breaks down the thermal management system of the Ford Mustang Mach-E and compares it with the Tesla Model Y. They look at parts count, coolant loops and heating approaches.

PewDiePie describes switching to Linux and encourages viewers to do the same. It is a casual, enthusiastic video aimed at a mainstream audience.

Ross Douthat interviews Peter Thiel about technological stagnation, AI, longevity, space travel and politics. Thiel also lays out his framing of the Antichrist as a risk of civilizational stagnation.

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.

Epic Games' reveal of Unreal Engine 5, a real-time demo running on PlayStation 5. It showcases Nanite virtualized micropolygon geometry and Lumen global illumination.

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.

A 12-minute beginner lesson from Nick Milo's Linking Your Thinking series introducing the Obsidian note-taking app and the first steps to start using it.

A very long video essay by Shaun on the decisions and motivations behind the atomic bombings of Hiroshima and Nagasaki, with a detailed timeline and argument that they were not militarily necessary.

A hobbyist compares vertical bifacial solar panels against south-facing angled panels using winter production results. It tests whether the usual mounting approach is actually best.

Neural-network upscaled, 60 fps, stabilized and colorized version of 1902 footage of the Wuppertal Schwebebahn suspended railway in Germany. The source film comes from MoMA. It gives a vivid view of an early-1900s city and a train system that still runs.

The opening lecture of MIT's Blockchain and Money course taught by Gary Gensler, covering the course plan, the history of failed digital currencies, cryptography and what a blockchain is.

Asianometry examines how East Germany tried and failed to build a native semiconductor industry despite heavy investment, including the espionage involved in acquiring Western microelectronics technology.