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Programming

'Can a Programming Language Implement Time Travel?' (stackoverflow.blog) 89

Stack Overflow's blog reports on a new programming language called Mariposa.

They call it a "toy" programming language, "created as a way to play around with a novel or odd feature, like variable assignment outside of the normal order of execution — more colloquially, time travel." Computer science has long sought to reason about time in electronic systems, thanks to a consistent interest in concurrency and real-time messaging... Mariposa allows you to manipulate the order of execution by assigning an instant to a variable, then setting the context of that instance. Here's a basic example, taken from the Mariposa readme:

x = 1
t = now()
print(x)
at t:
x = 2


According to the normal order of operations, this code should print "1". But because t is assigned to the instance in the second line, any modifications specified within an at t: block are applied immediately, and this code prints "2"...

While Mariposa caught a fair amount of attention recently, it's not the first implementation of time travel in programming. There is a Haskell package appropriately called tardis, which creates two state transformers: one travels forward in time and one backward. As the docs explain, "The most concise way to explain it is this: getPast retrieves the value from the latest sendFuture, while getFuture retrieves the value from the next sendPast." One function's past is another one's future.

The article explores "the history and future of other programming paradigms" applying logic to time, including interval temporal logic systems as well as "modeling, analysis, and verification languages/tools that allow temporal and state modeling without requiring temporal logic understanding."
Linux

'Damn Small Linux' is Back - But Bigger (itsfoss.com) 100

Back in 2006 Slashdot reported on a 50-megabyte "micro" distro called Damn Small Linux. (And in 2012 we wrote that it "rose from the dead" with a new release candidate.)

Now Damn Small Linux has been reborn again, according to its developer's web site: Creating the original DSL, a versatile 50MB distribution, was a lot of fun and one of the things I am most proud of as a personal accomplishment. However, as a concept, it was in the right place at the right time, and the computer industry has changed a lot since then. While it would be possible to make a bootable Xwindows 50MB distribution today, it would be missing many drivers and have only a handful of very rudimentary applications. People would find such a distribution a fun toy or something to build upon, but it would not be usable for the average computer user out of the gate....

The new goal of DSL is to pack as much usable desktop distribution into an image small enough to fit on a single CD, or a hard limit of 700MB. This project is meant to service older computers and have them continue to be useful far into the future. Such a notion sits well with my values. I think of this project as my way of keeping otherwise usable hardware out of landfills.

As with most things in the GNU/Linux community, this project continues to stand on the shoulders of giants. I am just one guy without a CS degree, so for now, this project is based on antiX 23 i386... a fantastic distribution that I think shares much of the same spirit as the original DSL project. AntiX shares pedigree with MEPIS and also leans heavily on the geniuses at Debian.

The blog It's FOSS News describes it as "a unique experience in a sea of Debian-based and Fedora-based distros." It is offered with two window managers, Fluxbox and JWM, with apt being fully enabled by default for easy package installations... At the time of writing, only the Alpha ISOs were made available on the official downloads page. It is only a matter of time before we get a stable release.
Japan

Japan's Moon Lander Overcomes Power Crisis, Starts Scientific Operations (theguardian.com) 35

Around three hours after its moon lander had touched down, Japan's space agency "decided to switch SLIM off with 12% power remaining to allow for a possible resumption when the sun's angle changed," reports Agence France-Presse.

Today there was good news: Japan's Moon lander has resumed operations, the country's space agency said on Monday, indicating that power had been restored after it was left upside down during a slightly haphazard landing. The probe, nicknamed the "moon sniper", had tumbled down a crater slope during its landing on 20 January, leaving its solar batteries facing in the wrong direction and unable to generate electricity...

The agency posted on X an image shot by Slim of "toy poodle", a rock observed near the lander.

Moon

Photo Shows Japan's Moon Lander Arrived Upside-Down (mashable.com) 22

"A photo of Japan's robotic moon lander shows that though the spacecraft did make the quarter-million-mile journey to the lunar surface, it landed upside down..." reports Mashable. Because of the lander's now-apparent inverted position, its solar panels weren't oriented correctly to generate power, according to the space agency. The team elected to conserve power by shutting down the spacecraft about 2.5 hours after landing.

What's perhaps as surprising as the photo of the lander is how it was taken. Two small rovers separated from the crewless mothership just prior to touchdown. It was one of these baseball-sized robots that was able to snap the image of the spacecraft with its head in the moondust. The rover, built with the help of Japanese toy maker Takara Tomy, is a sphere that splits in half to expose a pair of cameras that point front and back. The two hemispheres also become the rover wheels. "The company is perhaps most famous for originally creating the Transformers, the alien robots that can disguise themselves as machines," said Elizabeth Tasker, who provided commentary on the moon landing in English on Jan. 20.

The space agency still isn't entirely sure what went wrong. At about 55 yards above the ground, the spacecraft performed an obstacle avoidance maneuver, part of the pinpoint-landing demonstration. Just prior to this step, one of the two main engines stopped thrusting, throwing the lander's orientation off. JAXA is continuing to investigate what caused the engine problem... Despite the fact that the spacecraft is now sleeping, the SLIM team hasn't lost hope for a recovery. With solar panels facing west, the lander still has a chance of catching some rays and generating power. If the angle of sunlight changes, SLIM could still be awakened, mission officials said.

That would have to happen soon, though. Night will fall on the moon on Feb. 1, bringing about freezing temperatures. The spacecraft was not built to withstand those conditions.

NASA's Lunar Reconnaissance Orbiter spacecraft has now passed over the landing site at an altitude of about 50 miles (80 km) — and snapped their own photograph which they say shows "the slight change in reflectance around the lander due to engine exhaust sweeping the surface."
Television

Documentarians Secure Original 'ReBoot' Master Tapes, But Need Help To Play Them (globalnews.ca) 60

"Predating even Toy Story, ReBoot was the first 3D animated television show," writes longtime Slashdot reader sandbagger, sharing a new report from Global News. "The master tapes have been located in storage but the hardware needed to play the 1990s-era media has yet to be located." From the report: Produced in Vancouver by Mainframe Entertainment, it aired on YTV between 1994 and 2001, and decades later still has a committed fan base. Among those super fans are Jacob Weldon and Raquel Lin, a B.C. duo now crafting a documentary about the creation of the show and its impact in the film and TV world. Weldon said he wants to see ReBoot recognized for its place in the evolution of computer animation -- recognition he said it rarely gets.

When ReBoot was finally cancelled -- cut short in its fourth and final season -- its protagonists were left in peril and the show ended on a cliffhanger. It's another factor that Lin and Weldon say has helped immortalize the show and has helped fans hoping for a revival that might finally explain the characters' fate. Earlier this month, the documentary also got a potential major boost. Mainframe allowed Lin and Weldon to come to the studio to look for the show's original master tapes, recordings some believed might have been permanently lost. They struck gold. "They had boxes upon boxes upon boxes, hundreds of tapes," Lin said. "It's original resolution, original frame rate, uncompressed. If we could get a deck to play these, they would look beautiful," Weldon said.

Finding that deck, however, is the pair's next major challenge. The recordings are on a rare digital tape format called D1, a technology that Weldon said was cutting edge and rare when Mainframe was using it. It's even harder to find today, and even Mainframe doesn't have the equipment to play the tapes back. Weldon and Lin have since put out a call on social media for a working Bosch BTS D1 deck that would allow them to play the tapes, and incorporate them into their documentary. "I can't tell you how many people have called us, DM'd us, emailed us -- people from all over the world," Lin said. While the pair still haven't secured the deck, they're aiming to release their documentary by next summer. They're hoping it will help renew interest in the show, introduce it to new generations and perhaps see it get new life on a streaming platform.

The Internet

US Regulators Propose New Online Privacy Safeguards For Children 25

An anonymous reader quotes a report from the New York Times: The Federal Trade Commission on Wednesday proposed sweeping changes to bolster the key federal rule that has protected children's privacy online, in one of the most significant attempts by the U.S. government to strengthen consumer privacy in more than a decade. The changes are intended to fortify the rules underlying the Children's Online Privacy Protection Act of 1998, a law that restricts the online tracking of youngsters by services like social media apps, video game platforms, toy retailers and digital advertising networks. Regulators said the moves would "shift the burden" of online safety from parents to apps and other digital services while curbing how platforms may use and monetize children's data.

The proposed changes would require certain online services to turn off targeted advertising by default for children under 13. They would prohibit the online services from using personal details like a child's cellphone number to induce youngsters to stay on their platforms longer. That means online services would no longer be able to use personal data to bombard young children with push notifications. The proposed updates would also strengthen security requirements for online services that collect children's data as well as limit the length of time online services could keep that information. And they would limit the collection of student data by learning apps and other educational-tech providers, by allowing schools to consent to the collection of children's personal details only for educational purposes, not commercial purposes. [...]

The F.T.C. began reviewing the children's privacy rule in 2019, receiving more than 175,000 comments from tech and advertising industry trade groups, video content developers, consumer advocacy groups and members of Congress. The resulting proposal (PDF) runs more than 150 pages. Proposed changes include narrowing an exception that allows online services to collect persistent identification codes for children for certain internal operations, like product improvement, consumer personalization or fraud prevention, without parental consent. The proposed changes would prohibit online operators from employing such user-tracking codes to maximize the amount of time children spend on their platforms. That means online services would not be able to use techniques like sending mobile phone notifications "to prompt the child to engage with the site or service, without verifiable parental consent," according to the proposal. How online services would comply with the changes is not yet known. Members of the public have 60 days to comment on the proposals, after which the commission will vote.
Christmas Cheer

Amazon, Etsy, Launch Categories With 'Gifts For Programmers' (thenewstack.io) 20

Long-time Slashdot reader destinyland writes: It's a question that comes up all the time on Reddit. Etsy even created a special page for programmer-themed gift suggestions (showing more than 5,000 results). While CNET sticks to broader lists of "tech gifts" — and a separate list for "Star Wars gifts" — other sites around the web have been specifically honing in on programmer-specific suggestions. (Blue light-blocking glasses... A giant rubber duck... The world's strongest coffee... A printer that transfers digital images onto cheese...)

So while in years past Amazon has said they laughed at customer reviews for cans of uranium, this year Amazon has now added a special section that's entirely dedicated to Gifts for Computer Programmers, according to this funny rundown of 2023's "Gifts for Programmers" (that ends up recommending ChatGPT gift cards and backyard office sheds):

From the article: [Amazon's Gifts for Programmers section] shows over 3,000 results, with geek-friendly subcategories like "Glassware & Drinkware" and "Novelty Clothing"... For the coder in your life, Amazon offers everything from brainteasing programming puzzles to computerthemed jigsaw puzzles. Of course, there's also a wide selection of obligatory funny tshirts... But this year there's also tech-themed ties and motherboard-patterned socks...

Some programmers, though, might prefer a gift that's both fun and educational. And what's more entertaining than using your Python skills to program a toy robot dog...? But if you're shopping for someone who's more of a cat person, Petoi sells a kit for building a programmable (and open source) cat robot named "Nybble". The sophisticated Arduino-powered feline can be programmed with Python and C++ (as well as block-based coding)... [part of] the new community that's building around "OpenCat", the company's own quadruped robotic pet framework (open sourced on GitHub).

Google

Google's Best Gemini Demo Was Faked (techcrunch.com) 49

Speaking of early-impressions of Gemini, users' confidence in Google might be shaken further to learn that the company pretty much faked the most impressive demo of Gemini. TechCrunch: A video called "Hands-on with Gemini: Interacting with multimodal AI" hit a million views over the last day, and it's not hard to see why. The impressive demo "highlights some of our favorite interactions with Gemini," showing how the multimodal model (that is, it understands and mixes language and visual understanding) can be flexible and responsive to a variety of inputs.

To begin with, it narrates an evolving sketch of a duck from a squiggle to a completed drawing, which it says is an unrealistic color, then evinces surprise ("What the quack!") when seeing a toy blue duck. [...] Just one problem: the video isn't real. "We created the demo by capturing footage in order to test Gemini's capabilities on a wide range of challenges. Then we prompted Gemini using still image frames from the footage, and prompting via text." So although it might kind of do the things Google shows in the video, it didn't, and maybe couldn't, do them live and in the way they implied. In actuality, it was a series of carefully tuned text prompts with still images, clearly selected and shortened to misrepresent what the interaction is actually like.

Transportation

Whatever Happened to Amazon's Drone Delivery Service? (yahoo.com) 71

The New York Times shows an enormous Amazon drone hovering over a driveway in the Texas suburbs. (Alternate URL here.) The drone lets go of a large brown package, which plummets to the ground.

But 10 years after Amazon revealed its drone program, drone delivery is only "kind of" a reality, the Times argues — in one city in Texas. "The venture as it currently exists is so underwhelming that Amazon can keep the drones in the air only by giving stuff away." Years of toil by top scientists and aviation specialists have yielded a program that flies Listerine Cool Mint Breath Strips or a can of Campbell's Chunky Minestrone With Italian Sausage — but not both at once — to customers as gifts....

Only one item can be delivered at a time. It can't weigh over five pounds. It can't be too big. It can't be something breakable, since the drone drops it from 12 feet. The drones can't fly when it is too hot or too windy or too rainy. You need to be home to put out the landing target and to make sure that a porch pirate doesn't make off with your item or that it doesn't roll into the street... But your car can't be in the driveway. Letting the drone land in the backyard would avoid some of these problems, but not if there are trees. Amazon has also warned customers that drone delivery is unavailable during periods of high demand for drone delivery...

A more complicated issue was getting the technology to the point where it was safe not just most of the time but all of the time. The first drone that lands on someone's head, or takes off clutching a cat, sets the program back another decade, particularly if it is filmed.

The drones also struggled with real-world issues like Texas heat waves. During one heat wave the drones were suspended. And when they flew again, "a 54-year-old professor of civil engineering at Texas A&M ordered a medication through the mail. By the time he retrieved the package, the drug had melted." One of Amazon's customers tells the Times that Amazon's drones "feel more like a toy than anything — a toy that wastes a huge amount of paper and cardboard."

Amazon claims that in the last 10 months their drones have delivered "hundreds" of items in Texas. Beyond that, Amazon recently announced that its drone deliveries would be expanding within the next 14 months, the Times points out — to Britain, Italy, and a new U.S. location. "Yet even on the threshold of growth, a question lingers. Now that the drones finally exist in at least limited form, why did we think we needed them in the first place?"
Earth

People Send 20 Billion Pounds of 'Invisible' E-Waste To Landfills Each Year 106

An anonymous reader quotes a report from Popular Science: One e-toy for every person on Earth -- that's the staggering amount of electric trains, drones, talking dolls, R/C cars, and other children's gadgets tossed into landfills every year. Some of what most consumers consider to be e-waste -- like electronics such as computers, smartphones, TVs, and speaker systems -- are usual suspects. Others, like power tools, vapes, LED accessories, USB cables, anything involving rechargeable lithium batteries and countless other similar, "nontraditional" e-waste materials, are less obviously in need of special disposal. In all, people across the world throw out roughly 9 billion kilograms (19.8 billion pounds) of e-waste commonly not recognized as such by consumers.

This "invisible e-waste" is the focal point of the sixth annual International E-Waste Day on October 14, organized by Waste Electrical and Electronic Equipment (WEEE) Forum. In anticipation of the event, the organization recently commissioned the United Nations Institute for Training and Research (UNITAR) to delve into just how much unconventional e-waste is discarded every year -- and global population numbers are just some of the ways to visualize the issue.

According to UNITAR's findings, for example, the total weight of all e-cig vapes thrown away every year roughly equals 6 Eiffel Towers. Meanwhile, the total weight of all invisible e-waste tallies up to "almost half a million 40 [metric ton] trucks," enough to create a bumper-to-bumper traffic jam stretching approximately 3,504 miles -- the distance between Rome and Nairobi. From a purely economic standpoint, nearly $10 billion in essential raw materials is literally thrown into the garbage every year.
Further reading: Half a Billion Cheap Electrical Items Go To UK Landfills in a Year, Research Finds
Toys

Lego Drops Plans To Make Bricks From Recycled Plastic Bottles (cbsnews.com) 58

An anonymous reader quotes a report from CBS News: Denmark's Lego said on Monday that it remains committed to its quest to find sustainable materials to reduce carbon emissions, even after an experiment by the world's largest toymaker to use recycled bottles did not work. Lego said it has "decided not to progress" with making its trademark colorful bricks from recycled plastic bottles made of polyethylene terephthalate, known as PET, and after more than two years of testing "found the material didn't reduce carbon emissions." Lego enthusiastically announced in 2021 that the prototype PET blocks had become the first recycled alternative to pass its "strict" quality, safety and play requirements, following experimentation with several other iterations that proved not durable enough.

The company said scientists and engineers tested more than 250 variations of PET materials, as well as hundreds of other plastic formulations, before nailing down the prototype, which was made with plastic sourced from suppliers in the U.S. that were approved by the Food and Drug Administration and European Food Safety Authority. On average, a one-liter plastic PET bottle made enough raw material for ten 2 x 4 Lego bricks. Despite the determination that the PET prototype failed to save on carbon emissions, Lego said it remained "fully committed to making Lego bricks from sustainable materials by 2032." [...] Lego said it will continue to use bio-polypropylene, the sustainable and biological variant of polyethylene -- a plastic used in everything from consumer and food packaging to tires -- for parts in Lego sets such as leaves, trees and other accessories.

Movies

Code.org Embraces Barbie 9 Years After Helping Take Her Down (tynker.com) 75

Long-time Slashdot reader theodp writes: The number one movie in North America is Warner Bros. Discovery's Barbie, which Deadline reports has teamed up with Oppenheimer to fuel a mind-blowing $300M+ box office weekend. ["Oppenheimer Shatters Expectations with $80 Million Debut," read the headline at Variety.]

Now it seems everybody is trying to tap into Barbie buzz, including Microsoft's Xbox [which added Barbie and Ken's cars to Forza Horizon 5] and even Microsoft-backed education nonprofit Code.org. ("Are your students excited about Barbie The Movie? Have them try an HourOfCode [programming game] with Barbie herself!").

The idea is to inspire young students to become coders. But as Code.org shares Instagram images of a software developer Barbie, Slashdot reader theodp remembers when, nine years ago, Code.org's CEO "took to Twitter to blast Barbie and urge for her replacement." They'd joined a viral 2014 Computer Engineer Barbie protest that arose in response to the publication of Barbie F***s It Up Again, a scathing and widely reported-on blog post that prompted Mattel to pull the book Barbie: I Can Be a Computer Engineer immediately from Amazon. This may have helped lead to Barbie's loss of her crown as the most popular girls' toy in the ensuing 2014 holiday season to Disney's Frozen princesses Elsa and Anna, and got the Mattel exec who had to apologize for Computer Engineer Barbie called to the White House for a sit down a few months later. (Barbie got a brainy makeover soon thereafter)...

The following year, Disney-owned Lucasfilm and Code.org teamed up on Star Wars: Building a Galaxy with Code, a signature tutorial for the 2015 Hour of Code. Returning to a Disney princess theme in 2016, Disney and Code.org revealed a new Hour of Code tutorial featuring characters from the animated film Moana just a day ahead of its theatrical release. It was later noted that Moana's screenwriters included Pamela Ribon, who penned the 2014 Barbie-blasting blog post that ended Barbie's short reign as the Hour of Code role model of choice for girls.

Interestingly, Ribon seems to bear no Barbie grudges either, tweeting on the day of the Barbie movie release, "I was like holy s*** can't wait to see it."

To be fair, the movie's trailer promises "If you hate Barbie, this movie is for you," in a deconstruction where Barbie is played by D.C. movies' "Harley Quinn" actress Margot Robbie (Suicide Squad, Birds of Prey), whose other roles include Tonya Harding and the home-wrecking second wife in The Wolf of Wall Street.
Security

Despite Amazon Ban, Flipper Zero's 'Multi-Tool Device for Hackers' On Track for $80M in Sales (techcrunch.com) 80

The company behind Flipper Zero expects $80 million in sales this year, which ZDNet estimates at around 500,000 unit sales.

In its Kickstarter days the company sold almost $5 million as preorders, remembers TechCrunch, and the company claims it sold $25 million worth of the devices last year: So what are they selling? Flipper Zero is a "portable gamified multi-tool" aimed at everyone with an interest in cybersecurity, whether as a penetration tester, curious nerd or student — or with more nefarious purposes. The tool includes a bunch of ways to manipulate the world around you, including wireless devices (think garage openers), RFID card systems, remote keyless systems, key fobs, entry to barriers, etc. Basically, you can program it to emulate a bunch of different lock systems.

The system really works, too — I'm not much of a hacker, but I've been able to open garages, activate elevators and open other locking systems that should be way beyond my hacking skill level. On the one hand, it's an interesting toy to experiment with, which highlights how insecure much of the world around us actually is. On the other hand, I'm curious if it's a great idea to have 300,000+ hacking devices out in the wild that make it easy to capture car key signals and gate openers and then use them to open said apertures.

The company points out that their firmware is open source, and can be inspected by anyone.

ZDNet calls it "incredibly user-friendly" and "a fantastic educational tool and a stepping stone to get people — young and old — into cybersecurity," with "a very active community of users that are constantly finding new things to do with it". (Even third-party operating systems are available).

"Instead of looking like some scary hacking tool, all black and bristling with antennas, it looks like a kid's toy, all plastic and brightly colored," writes ZDNet. "It reminds me of Tamagotchis..."

Thanks to Slashdot reader ZipNada for suggesting the article.
AI

Amazon Using Generative AI To Summarize Product Reviews (cnbc.com) 26

Amazon is turning to artificial intelligence to help users find the right product. From a report: The e-retailer recently began testing a feature in its shopping app that uses AI to summarize reviews left by customers on some products. It provides a brief overview of what shoppers liked and disliked about the product, along with a disclaimer that the summary is "AI-generated from the text of customer reviews." A mobile listing for a children's "Magic Mixies" cauldron toy says that buyers gave positive feedback around its "fun factor, appearance, value, performance, quality, charging, and leakage."

"However, the majority of customers have expressed negative opinions on these aspects," the summary states. "For example, some customers have paid over $100 for a toy that wasn't worth it, while others have experienced issues with the product's quality and charging." Amazon confirmed that it's testing the feature. The company didn't share specific details about it works or what AI models are being used to summarize.

Toys

New Spider-Man Movie Features Lego Scene Made By 14-Year-Old (yahoo.com) 35

Isaac-Lew (Slashdot reader #623) writes: The Lego scene in "Spider-Man: Across The Spider-Verse" was animated by a 14-year-old high school student after the producers saw the trailer he made that was animated Lego-style.
The teenager had used his father's old computers to recreate the trailer "shot for shot to look as if it belonged in a Lego world," reports the New York Times: By that point, he had been honing his skills for several years making short computer-generated Lego videos. "My dad showed me this 3-D software called Blender and I instantly got hooked on it," he said. "I watched a lot of YouTube videos to teach myself certain stuff..."

[A]fter finding the movie's Toronto-based production designer, Patrick O'Keefe, on LinkedIn, and confirming that Sony Pictures Animation's offer was legitimate, Theodore Mutanga, a medical physicist, built his son a new computer and bought him a state-of-the-art graphics card so he could render his work much faster... Over several weeks, first during spring break and then after finishing his homework on school nights, Mutanga worked on the Lego sequence... Christophre Miller [a director of "The Lego Movie" and one of the writer-producers of "Spider-Verse."] saw Mutanga's contribution to "Across the Spider-Verse" not only as a testament to the democratization of filmmaking, but also to the artist's perseverance: he dedicated intensive time and effort to animation, which is "not ever fast or easy to make," Miller said.

'The Lego Movie' is inspired by people making films with Lego bricks at home," Lord said by video. "That's what made us want to make the movie. Then the idea in 'Spider Verse' is that a hero can come from anywhere. And here comes this heroic young person who's inspired by the movie that was inspired by people like him."

Power

Researchers Craft a Fully Edible Battery (arstechnica.com) 40

An anonymous reader quotes a report from Ars Technica: A team of researchers at the Italian Institute of Technology (IIT) in Milan recently created a fully rechargeable battery using nontoxic edible components. This is probably the world's first battery that is safe to ingest and entirely made of food-grade materials. "Given the level of safety of these batteries, they could be used in children's toys, where there is a high risk of ingestion," said Mario Caironi, a senior researcher at IIT. However, this isn't the only solution the edible battery could provide. Apart from serving as an alternative to conventional toxic toy batteries, the edible battery from IIT could also play a key role in making health care applications safer than ever. For instance, doctors have to be cautious regarding the use of miniature electronic devices (such as drug-delivery robots, biosensors, etc.) inside the human body, as they come equipped with batteries made of toxic substances. An edible battery could solve this problem. There are also more mundane applications, like replacing batteries in pet toys.

Ivan K. Ilic, first author of the study and a postdoctoral researcher at IIT, told Ars Technica, "Two main ways a battery damages human tissue when it's inside the body is by doing water electrolysis and by the toxicity of its materials. Water electrolysis is a phenomenon where electricity with a voltage higher than 1.2 V (virtually all commercial batteries) breaks water into oxygen and hydrogen (an explosive gas), and it is very dangerous if it occurs in the stomach. Our battery is way below this voltage, around 0.65 V, so water electrolysis cannot occur. On the other hand, we used only food materials, so nothing is toxic!" Before the battery is useful, however, the researchers will need to first enhance the battery's power capacity. Currently, the edible battery can supply 48 microamperes of current for a bit over 10 minutes. So it can easily meet the power demand of a miniature medical device or a small LED. "These batteries are no competition to ordinary batteries -- they will not power electric cars -- but they are meant to power edible electronics and maybe some other niche applications, so their main advantage is non-toxicity," said Ilic.
Here's a list of what makes these edible batteries work, as mentioned by Ars:

- "Quercetin, a pigment found in almonds and capers, serves as the battery cathode, whereas riboflavin (vitamin B2) makes up the battery anode.
- The researchers used nori (edible seaweed that is used in the wrapping of sushi rolls) as the separator and a water-based solution (aqueous NaHSO4) as the electrolyte.
- Activated charcoal is employed to achieve high electrical conductivity in the battery.
The battery electrodes come covered in beeswax and connect to a gold foil (used to cover pastries) that laminates a supporting structure made of ethyl cellulose."

The research has been published in the journal Advanced Materials.
Businesses

Major Retail Players Are Walking Back Their Metaverse Strategies (modernretail.co) 53

For some of the largest retail companies and brands, the metaverse is losing its luster. From a report: Walmart has reportedly shut down its Universe of Play metaverse experience on Roblox just six months after its launch, according to consumer advocacy group Tina.org. Walmart, for its part, said it discontinued the experience "as planned." Walt Disney has axed the next-generation storytelling and consumer-experiences unit that was mapping out the company's metaverse strategies late last month. This string of news came after social media giant Meta reported that its metaverse division generated a loss of $4.3 billion in the fourth quarter.

These reports have raised questions on the metaverse's ability to yield returns on the investments companies have made in it. Retailers and brands have mainly been using the metaverse to build brand experiences and marketing, but many have yet to report on its conversion rate. In an economic environment where retailers and brands have been attempting to cut costs, experts said that retailers would likely pare down unprofitable areas of their businesses. "One of the biggest challenges was really figuring out the right [key performance indicators] and also just figuring out if there weren't even implications for many brands when it came to their physical product," said Melissa Minkow, director of retail strategy at digital consultancy firm CI&T. "It was just such a big, broad, abstract landscape that it seemed there was kind of a lack of direction."

In recent years, brands saw the metaverse as a means of elevating their virtual experiences, and reaching Gen Z in particular. Walmart launched Universe of Play in September and had mainly marketed it as an immersive virtual toy destination. For Disney, the division in charge of its metaverse strategy was focused on crafting interactive storytelling methods using technologically advanced channels. Retailers of varying sizes were attempting to look for ways to incorporate the metaverse in their strategies. While brands were optimistic about the metaverse, consumers didn't seem to match their sentiment. Minkow, who authored a recent CI&T report, found that 81% of respondents haven't made a purchase in the metaverse and 45% said that they don't ever see themselves shopping in it. Meta initially set a 500,000 monthly active user target for its metaverse offering, Horizon Worlds, by the end of last year but then changed its goal to 280,000, indicating how the company underestimated people's engagement level with the platform.

AI

'Overemployed' Hustlers Exploit ChatGPT To Take On Even More Full-Time Jobs (vice.com) 117

An anonymous reader quotes a report from Motherboard: About a year ago, Ben found out that one of his friends had quietly started to work multiple jobs at the same time. The idea had become popular during the COVID-19 pandemic, when working from home became normalized, making the scheme easier to pull off. A community of multi-job hustlers, in fact, had come together online, referring to themselves as the "overemployed." The idea excited Ben, who lives in Toronto and asked that Motherboard not use his real name, but he didn't think it was possible for someone like him to pull it off. He helps financial technology companies market new products; the job involves creating reports, storyboards, and presentations, all of which involve writing. There was "no way," he said, that he could have done his job two times over on his own.

Then, last year, he started to hear more and more about ChatGPT, an artificial intelligence chatbot developed by the research lab OpenAI. Soon enough, he was trying to figure out how to use it to do his job faster and more efficiently, and what had been a time-consuming job became much easier. ("Not a little bit more easy," he said, "like, way easier.") That alone didn't make him unique in the marketing world. Everyone he knew was using ChatGPT at work, he said. But he started to wonder whether he could pull off a second job. Then, this year, he took the plunge, a decision he attributes to his new favorite online robot toy. "That's the only reason I got my job this year," Ben said of OpenAI's tool. "ChatGPT does like 80 percent of my job if I'm being honest." He even used it to generate cover letters to apply for jobs.

Over the last few months, the exploding popularity of ChatGPT and similar products has led to growing concerns about AI's potential effects on the international job market -- specifically, the percentage of jobs that could be automated away, replaced by a well-oiled army of chatbots. But for a small cohort of fast-thinking and occasionally devious go-getters, AI technology has turned into an opportunity not to be feared but exploited, with their employers apparently none the wiser. The people Motherboard spoke with for this article requested anonymity to avoid losing their jobs. For clarity, Motherboard in some cases assigned people aliases in order to differentiate them, though we verified each of their identities. Some, like Ben, were drawn into the overemployed community as a result of ChatGPT. Others who were already working multiple jobs have used recent advancements in AI to turbocharge their situation, like one Ohio-based technology worker who upped his number of jobs from two to four after he started to integrate ChatGPT into his work process. "I think five would probably just be overkill," he said.

The Courts

Supreme Court Ponders a Surprisingly Difficult Case About Poop Jokes (vox.com) 135

The Supreme Court will take a break on Wednesday from the unusually political mix of cases it decided to hear during its current term, to consider a case about poop jokes. From a report: Jack Daniel's v. VIP Products asks whether VIP Products, the nation's second-largest maker of dog toys, infringed upon the whiskey maker's trademarked bottle shape and label when it sold dog toys that resemble a bottle of Jack Daniel's. The dog toy, named "Bad Spaniels," juxtaposes imagery drawn from the whiskey maker's trademarks with a gag about a dog dropping âoethe old No. 2 on your Tennessee carpet." Jack Daniel's seeks a court order prohibiting VIP from continuing to sell this toy.

Jack Daniel's is, on the surface, a very silly case, which prompted some very silly attempts by the whiskey maker's lawyers to explain why their client is so offended by this dog toy. Sample quote from their brief: "Jack Daniel's loves dogs and appreciates a good joke as much as anyone. But Jack Daniel's likes its customers even more, and doesn't want them confused or associating its fine whiskey with dog poop." Lurking below the surface, however, are very serious questions about the First Amendment. And about how far courts should go in second-guessing Congress's decisions about how to balance the needs of the marketplace with the demands of free speech. VIP has strong legal arguments that it should prevail in this case, but Jack Daniel's also raises strong claims that the lower courts did too much to undermine federal trademark law.

Programming

GCC Gets a New Frontend for Rust (fosdem.org) 106

Slashdot reader sleeping cat shares a recent FOSDEM talk by a compiler engineer on the team building Rust-GCC, "an alternative compiler implementation for the Rust programming language."

"If gccrs interprets a program differently from rustc, this is considered a bug," explains the project's FAQ on GitHub.

The FAQ also notes that LLVM's set of compiler technologies — which Rust uses — "is missing some backends that GCC supports, so a gccrs implementation can fill in the gaps for use in embedded development." But the FAQ also highlights another potential benefit: With the recent announcement of Rust being allowed into the Linux Kernel codebase, an interesting security implication has been highlighted by Open Source Security, inc. When code is compiled and uses Link Time Optimization (LTO), GCC emits GIMPLE [an intermediate representation] directly into a section of each object file, and LLVM does something similar with its own bytecode. If mixing rustc-compiled code and GCC-built code in the Linux kernel, the compilers will be unable to perform a full link-time optimization pass over all of the compiled code, leading to absent CFI (control flow integrity).

If Rust is available in the GNU toolchain, releases can be built on the Linux kernel (for example) with CFI using LLVM or GCC.

Started in 2014 (and revived in 2019), "The effort has been ongoing since 2020...and we've done a lot of effort and a lot of progress," compiler engineer Arthur Cohen says in the talk. "We have upstreamed the first version of gccrs within GCC. So next time when you install GCC 13 — you'll have gccrs in it. You can use it, you can start hacking on it, you can please report issues when it inevitably crashes and dies horribly."

"One big thing we're doing is some work towards running the rustc test suite. Because we want gccrs to be an actual Rust compiler and not a toy project or something that compiles a language that looks like Rust but isn't Rust, we're trying really hard to get that test suite working."

Read on for some notes from the talk...

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