LightBurn Turns Back The Clock, Bails On Linux Users

July 31, 2024 by Tom Nardi 219 Comments

Angry Birds, flash mobs, Russell Brand, fidget spinners. All of these were virtually unavoidable in the previous decade, and yet, like so many popular trends, have now largely faded into obscurity. But in a recent announcement, the developers of LightBurn have brought back a relic of the past that we thought was all but buried along with Harambe — popular software not supporting Linux.

But this isn’t a case of the developers not wanting to bring their software to Linux. LightBurn, the defacto tool for controlling hobbyist laser cutters and engravers, was already multi-platform. Looking forward, however, the developers claim that too much of their time is spent supporting and packaging the software for Linux relative to the size of the user base. In an announcement email sent out to users, they reached even deeper into the mid-2000s bag of excuses, and cited the number of Linux distributions as a further challenge:

The segmentation of Linux distributions complicates these burdens further — we’ve had to provide three separate packages for the versions of Linux we officially support, and still encounter frequent compatibility issues on those distributions (or closely related distributions), to say nothing of the many distributions we have been asked to support.

We’re not sure how much of their time could possibly be taken up by responding to requests for supporting additional distributions (especially when the answer is no), but apparently, it was enough that they finally had to put their foot down — the upcoming 1.7.00 release of LightBurn will be the last to run on Linux.

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End Of An Era: Sony Cuts Production Of Writable Optical Media

July 25, 2024 by Lewin Day 64 Comments

The 1990s saw a revolution occur, launched by the CD burner. As prices of writeable media and drives dropped, consumers rushed to duplicate games, create their own mix CDs, and backup their data on optical disc. It was a halcyon time.

Fast forward to today, and we’re very much on downward curve when it comes to optical media use. Amidst ever-declining consumer interest, Sony has announced it will cut production of writeable optical media. Let’s examine what’s going on, and explore the near future for writable optical discs.

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You Can Use LEDs As Sensors, Too

July 23, 2024 by Lewin Day 69 Comments

LEDs are a wonderful technology. You put in a little bit of power, and you get out a wonderful amount of light. They’re efficient, cheap, and plentiful. We use them for so much!

What you might not have known is that these humble components have a secret feature, one largely undocumented in the datasheets. You can use an LED as a light source, sure, but did you know you can use one as a sensor?

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Desiccants, Tested Side By Side

July 19, 2024 by Jenny List 40 Comments

We’re so used to seeing a little sachet of desiccant drop out of a package when we open it, that we seldom consider these essential substances. But anyone who spends a while around 3D printing soon finds the need for drying their filament, and knowing a bit about the subject becomes of interest. It’s refreshing then to see [Big Clive] do a side-by-side test of a range of commonly available desiccants. Of silica gel, bentonite, easy-cook rice, zeolite, or felight, which is the best? He subjects them to exactly the same conditions over a couple of months, and weighs them to measure their efficiency in absorbing water.

The results are hardly surprising, in that silica gel wins by a country mile. Perhaps the interesting part comes in exploding the rice myth; while the rice does have some desiccant properties, it’s in fact not the best of the bunch despite being the folk remedy for an immersed mobile phone.

Meanwhile, this isn’t the first time we’ve looked at desiccants, in the past we’ve featured activated alumina.

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This Week In Security: Snowflake, The CVD Tension, And Kaspersky’s Exit — And Breaking BSOD

July 19, 2024 by Jonathan Bennett 37 Comments

In the past week, AT&T has announced an absolutely massive data breach. This is sort of a multi-layered story, but it gives me an opportunity to use my favorite piece of snarky IT commentary: The cloud is a fancy way to talk about someone else’s servers. And when that provider has a security problem, chances are, so do you.

The provider in question is Snowflake, who first made the news in the Ticketmaster breach. As far as anyone can tell, Snowflake has not actually been directly breached, though it seems that researchers at Hudson Rock briefly reported otherwise. That post has not only been taken down, but also scrubbed from the wayback machine, apparently in response to a legal threat from Snowflake. Ironically, Snowflake has confirmed that one of their former employees was compromised, but Snowflake is certain that nothing sensitive was available from the compromised account.

At this point, it seems that the twin problems are that big organizations aren’t properly enforcing security policy like Two Factor Authentication, and Snowflake just doesn’t provide the tools to set effective security policy. The Mandiant report indicates that all the breaches were the result of credential stealers and other credential-based techniques like credential stuffing. Continue reading “This Week In Security: Snowflake, The CVD Tension, And Kaspersky’s Exit — And Breaking BSOD” →

Lasers Could Help Us Recycle Plastics Into Carbon Dots

July 18, 2024 by Lewin Day 17 Comments

As it turns out, a great deal of plastics are thrown away every year, a waste which feels ever growing. Still, as reported by Sci-Tech Daily, there may be help on the way from our good friend, the laser!

The research paper from the University of Texas outlines the use of lasers for breaking down tough plastics into their baser components. The method isn’t quite as simple as fire a laser off at the plastic, though. First, the material must be laid on a special two-dimensional transition metal dichalcogenide material — a type of atomically-thin semiconductor at the very forefront of current research. When the plastics are placed under the right laser light in this scenario, carbon-hydrogen bonds in the plastic are broken and transformed, creating new chemical bonds. Done right, and you can synthesize luminescent carbon dots from the plastic itself!

“By harnessing these unique reactions, we can explore new pathways for transforming environmental pollutants into valuable, reusable chemicals, contributing to the development of a more sustainable and circular economy,” says Yuebing Zheng, a leader on the project. “This discovery has significant implications for addressing environmental challenges and advancing the field of green chemistry.”

Sure it’s a bit trickier than turning old drink bottles into filament, but it could be very useful to researchers and those investigating high-tech materials solutions. Don’t forget to read up on the sheer immensity of the world’s plastic recycling problems, either. If you’ve got the solution, let us know!

Las Vegas’ Sphere: Powered By Nvidia GPUs And With Impressive Power Bill

July 17, 2024 by Maya Posch 51 Comments

A daytime closeup of the LED pucks that comprise the exosphere of the Sphere in Paradise, Nevada (Credit: Y2kcrazyjoker4, Wikimedia)

As the United States’ pinnacle of extravaganza, the Las Vegas Strip and the rest of the town of Paradise are on a seemingly never-ending quest to become brighter, glossier and more over the top as one venue tries to overshadow the competition. A good example of this is the ironically very uninspiredly named Sphere, which has both an incredibly dull name and yet forms a completely outrageous entertainment venue with a 54,000 m² (~3.67 acre) wrap-around interior LED display (16 x 16K displays) and an exterior LED display (‘Exosphere’) consisting out of 1.23 million LED ‘pucks’. Although opened in September of 2023, details about the hardware that drives those displays have now been published by NVidia in a recent blog post.

Driving all these pixels are around 150 NVidia RTX A6000 GPUs, installed in computer systems which are networked using NVidia BlueField data processing units (DPUs) and NVidia ConnectX-6 NICs (up to 400 Gb/s), with visual content transferred from Sphere Studios in California to the Sphere. All this hardware uses about 45 kW of power when running at full blast, before adding the LED displays and related hardware to the total count, which is estimated to be up to 28 MW of power and causing local environmentalists grief despite claims by the owner that it’ll use solar power for 70% of the power needs, despite many night-time events. Another item that locals take issue with is the amount of light pollution that the exterior display adds.

Although it’s popular to either attack or defend luxurious excesses like the Sphere, it’s interesting to note that the state of Nevada mostly gets its electricity from natural gas. Meanwhile the 2.3 billion USD price tag for the Sphere would have gotten Nevada 16.5% of a nuclear power station like Arizona’s Palo Verde (before the recurring power bill), but Palo Verde’s reactor spheres are admittedly less suitable for rock concerts.