lock-free

A 2007 Google Tech Talk in which Cliff Click of Azul Systems presents a lock-free concurrent hash table that scales to 768 CPUs. He explains why it is correct by reasoning in a different way than usual happens-before and memory-order arguments.

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.

The first lesson of MangoJelly's FreeCAD 0.20 beginner course, covering setup, preferences and navigation. The series teaches fundamentals through complete workflows such as sketching, Part Design and STL export.

The introduction to MangoJelly's beginner course for FreeCAD 1.0. The course teaches solid modeling with the Part Design, Sketcher and Part workbenches.

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.

Rowan Atkinson's speech at the launch of the Reform Section 5 campaign in Parliament in 2012. He argues against criminalizing insulting words and for answering speech with more speech.

The first episode of Milton Friedman's 1980 Free To Choose series, on how markets and voluntary exchange organize economic activity and the price system. It includes visits to Hong Kong, the U.S. and Scotland and a panel discussion with critics.

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

Christopher Hitchens delivers a speech defending freedom of speech, including the right of audiences to hear offensive speakers and a take on the fire-in-a-crowded-theatre line. It is framed around the Charlie Hebdo attack.

James Mickens of Harvard gives a funny lecture at HBS's Future Assembly arguing that blockchains are a very bad idea. He covers their trust, legal and practical shortcomings for real-world problems.

CuriousMarc powers up a vintage HP 5061A cesium beam clock and explains both the quantum principle and the HP implementation in detail. It is part of a longer atomic clock series.

Benn Jordan details security vulnerabilities in Flock Safety license-plate-reading cameras and how easily they can be compromised. It includes citations from security researchers and discussion of police surveillance.

The first episode of Clickspring's series building a John Wilding skeleton clock from raw stock in a home machine shop. It covers making the frames along with the tools needed for the job.

Andreas Antonopoulos explains how to tell Bitcoin-style blockchains from corporate blockchain hype. He argues the goal should be de-banking everyone rather than banking the unbanked.

Anders Brownworth gives a basic visual introduction to blockchain using an interactive web demo, covering SHA256 hashes, blocks, chains, distribution, tokens and coinbase transactions.

Locksport historian Schuyler Towne's RVASec 2012 talk on why people lock their doors, tracing the history of locks and the assumptions about security behind them.

Engineer Stuff Made Here builds two new supposedly unpickable locks with different designs and sends them to the Lock Picking Lawyer to see whether they can be defeated. The video covers the novel anti-picking mechanisms.

UnHerd interview with Swedish epidemiologist Johan Giesecke, who explains why he thinks lockdowns are the wrong policy and describes Sweden's approach during the spring 2020 pandemic.

Lock-picking YouTuber Bill Johnson (BosnianBill) explains how to choose a high-security lock and why, showing examples and comparing designs. It covers what makes some padlocks more pick-resistant than others.

Eben Moglen's re:publica 2012 talk argues that media which spy on and data-mine the public threaten freedom of thought, and that free technology and free culture are needed to protect it.

Rowan Atkinson speaks against the word 'insulting' in the UK Public Order Act, as part of the Reform Section 5 campaign. He argues for robust free speech and against the slippery slope of criminalizing offense.

A 2018 tutorial explaining uBlock Origin's advanced user mode, including how to block scripts and use the dynamic filtering settings. It positions the extension as a replacement for tools like uMatrix.

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.

Practical Engineering explains how canal locks work, including the water-saving basins of the new Panama Canal locks.

A 1997 Noam Chomsky talk at Northeastern University about the gap between free-market rhetoric and practice. He argues that business relies heavily on state intervention, and he discusses trade, NAFTA and labour versus capital mobility.

Benn Jordan concludes his Flock trilogy, filmed on a publicly deployed Flock Safety camera, covering a leak of camera feeds reported by 404 Media. He shows the cameras' capabilities, including panning to track people.

Eben Moglen of the Software Freedom Conservancy speaks at the 2009 Law of the Commons Conference about free and open software as a model for a new intellectual commons. The talk covers the legal and social case for sharing knowledge.

Jordan Hubbard, FreeBSD co-founder, discusses where FreeBSD might go over the next decade at MeetBSD California 2014. He draws on his Apple Unix experience, including bringing launchd-style init ideas to FreeBSD.

Stuff Made Here designs and builds an "unpickable" lock, then calls in a locksmith to see if it can be defeated. It covers the mechanical design effort and the attempt to pick it.

A short clip from an ACM and Computer History Museum interview in which Leslie Lamport discusses writing his paper on time, clocks and the ordering of events. He explains its link to special relativity.

A short clip of Richard Stallman singing the free software song, recorded during a visit to Ecuador.

Not Just Bikes visits the Toronto Islands, home to Canada's only car-free neighbourhood. He explains the waiting list and strict ownership rules and asks why more such places aren't built.

Matt Ahrens presents the FreeBSD Foundation sponsored RAID-Z Expansion project for ZFS at the June 2021 FreeBSD Developer Summit. It explains how a RAID-Z vdev can be grown by adding disks on the fly.

Highlight clip from the 2021 Free Expression Awards honoring YouTube CEO Susan Wojcicki. The video became notable for its overwhelmingly negative like/dislike ratio.

Richard Stallman's TEDxGeneva 2014 talk describing how nonfree programs give companies control over users and what users can do to regain control. It introduces the free software movement and the four freedoms.

Neuroscientist Karl Friston gives a 15-minute talk on the free energy principle, covering Markov blankets, Bayesian model evidence and global brain theories.

CppCon 2014 talk by Jeff Preshing on how Ubisoft Montreal developed games for multicore hardware, before and after C++11 concurrency support. It goes into atomics and lock-free programming in practice.

Netflix engineer Drew Gallatin explains why the company runs FreeBSD-current on its CDN. He describes the team, how they track upstream, their contributions and performance milestones, and a bug causing a 20% performance regression.

A short Vox video on Barcelona's superblocks, an urban design approach that closes interior streets to through traffic to return space to pedestrians.

LockPickingLawyer shows what happens when liquid gallium is applied to an aluminum Abus padlock, which weakens and breaks the metal. It is a short demonstration of gallium's effect on aluminum.