Feb 062019

At the start of his linux.conf.au 2019 talk, Kristoffer Grönlund said that he would be taking attendees back 60 years or more. That is not quite to the dawn of computing history, but it is close—farther back than most of us were alive to remember. He encountered John McCarthy’s famous Lisp paper [PDF] via Papers We Love and it led him to dig deeply into the Lisp world; he brought back a report for the…

External feed Read More at the Source: https://lwn.net/Articles/778550/rss

 2019-02-06  Comments Off on [$] Lisp and the foundations of computing LWN.net
Feb 062019

The EU’s on-again/off-again Copyright Directive keeps sinking under its own weight: on the one side, you have German politicians who felt that it was politically impossible to force every online platform to spend hundreds of millions of euros to buy copyright filters to prevent a user from infringing copyright, even for an instant, and so proposed tiny, largely cosmetic changes to keep German small businesses happy; on the other side, you have French politicians who…

External feed Read More at the Source: https://boingboing.net/2019/02/05/death-sentence-for-the-web.html

 2019-02-06  Comments Off on France and Germany just cut a deal to save the EU’s #CopyrightDirective — and made it much, much worse (PLEASE SHARE THIS POST!) Boing Boing
Feb 062019

Early adopters of LED lighting will remember 50,000 hour or even 100,000 hour lifetime ratings printed on the box. But during a recent trip to the hardware store the longest advertised lifetime I found was 25,000 hours. Others claimed only 7,500 or 15,000 hours. And yes, these are brand-name bulbs from Cree and GE. So, what happened to those 100,000 hour residential LED bulbs? Were the initial estimates just over-optimistic? Was it all marketing hype? Or,…

External feed Read More at the Source: https://hackaday.com/2019/02/05/what-happened-to-the-100000-hour-led-bulbs/

 2019-02-06  Comments Off on What Happened to the 100,000-Hour LED Bulbs? Hackaday
Feb 062019

The 3D printers we’re most familiar with use the fused deposition process, in which hot plastic is squirted out of a nozzle, to build up parts on a layer by layer basis. We’ve also seen stereolithography printers, such as the Form 2, which use a projector and a special resin to produce parts, again in a layer-by-layer method. However, a team from the University of North Carolina were inspired by CT scanners, and came up…

External feed Read More at the Source: https://hackaday.com/2019/02/05/3d-printing-with-tomography-in-reverse/

 2019-02-06  Comments Off on 3D Printing With Tomography in Reverse Hackaday
Feb 062019

Back in 1947, decades before cat memes became a way of life, experimental documentary filmmakers Maya Deren and Alexander Hammid gave us a lovely glimpse of the “Private Life of a Cat.” From Archive.org: RECORDS FEMALE CAT & HER 5 KITTENS AS MOTHER CAT APPROACHES LABOR, KITTENS ARE BORN & OBTAIN MILK & MOTHER CAT THEN CARES FOR THEM IN LEARNING & GROWING PROCESS, IN WHICH TOM CAT OCCASIONALLY PARTICIPATES. (via r/ObscureMedia) Previously: Maya Deren’s…

External feed Read More at the Source: https://boingboing.net/2019/02/05/watch-the-private-life-of-a-ca.html

 2019-02-06  Comments Off on Watch the Private Life of a Cat Boing Boing