FEX-Emu 2305 has been released, the open-source project continuing to work on x86_64 atop 64-bit ARM (AArch64) emulation support for being able to enjoy more games on ARM Linux and other software not otherwise natively available...

A fast-food chain struggling to hire staff is using AI to help fill the gaps at the drive-thru.

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The state of perfect stillness known as absolute zero is one of the Universes impossible achievements. As close as we can get, the laws of physics will always prevent us from hitting thermal rock bottom.

An international team of researchers has now identified a new theoretical route to reach the mythical mark of zero Kelvin, or-273.15 degrees Celsius (459.67 degrees Fahrenheit). No, its not more likely to break any laws and remove every last shimmer of heat, but the framework could inspire new ways of exploring matter at low temperatures.

As a consequence of the third law of thermodynamics, the removal of increments of heat energy from a group of particles to cool them to absolute zero will always take an infinite number of steps. As such, it requires an infinite amount of energy to achieve. Quite the challenge.

Like treasured recipes passed down from generation to generation, there are just some regions of DNA that evolution doesnt dare tweak. Mammals far and wide share a variety of such encoded sequences, for example, which have remained untouched for millions of years.

Humans are a strange exception to this club. For some reason, recipes long preserved by our ancient ancestors were suddenly spiced up within a short evolutionary period of time.

Because were the only species in which these regions have been rewritten so rapidly, they are called human accelerated regions (or HARs). Whats more, scientists think at least some HARs could be behind many of the qualities that set humans apart from their close relatives, like chimpanzees and bonobos.

An international team of scientists has imaged and analyzed THz waves that propagate in the form of plasmon polaritons along thin anisotropic semiconductor platelets with wavelengths reduced by up to 65 times compared to THz waves in free space.

Whats even more intriguing is that the wavelengths vary with the direction of propagation. Such THz waves can be applied for probing fundamental material properties at the nanometer scale and pave the way to the development of ultra-compact on-chip THz devices. The work has been published in Nature Materials.

Polaritons are hybrid states of light and matter that arise from the coupling of light with matter excitations. Plasmon and phonon polaritons are among the most prominent examples, formed by the coupling of light to collective electron oscillations and crystal lattice vibrations, respectively.

Inside the proton are elementary particles called quarks. Quarks and protons have an intrinsic angular momentum called spin. Spin can point in different directions. When it is perpendicular to the protons momentum, it is called a transverse spin. Just like the proton carries an electric charge, it also has another fundamental charge called the tensor charge. The tensor charge is the net transverse spin of quarks in a proton with transverse spin.

The only way to obtain the tensor charge from experimental data is using the theory of quantum chromodynamics (QCD) to extract the transversity function. This universal function encodes the difference between the number of quarks with their spin aligned and anti-aligned to the protons spin when it is in a transverse direction. Using state-of-the-art data science techniques, researchers recently made the most precise empirical determination of the tensor charge.

Due to the phenomenon known as confinement, quarks are always bound in the proton or other hadrons (particles with multiple quarks). The challenge is to connect the theory of quark interactions (QCD) to experimental measurements of high-energy collisions involving hadrons.

Worth a repost. Via: Truthstream Media:

upstart writes:

Meta's ad business slapped with interim measures in France over suspected antitrust abuse:

More regulatory woes for Meta: France's competition watchdog has announced interim measures on the adtech giant saying it suspects it of abusing a dominant position in the French market for ads on social media and across the broader (non-search-related) online ads market.

It's ordering Meta to suspend application of the current criteria it imposes for granting ad verification partnerships; and giving it two months to define and publish new rules for accessing and maintaining viewability and brand safety partnerships which the Authority specifies must be "objective, transparent, non-discriminatory and proportionate".

Meta must also have a transparent access procedure for the partnerships that is not based on an invitation it sends, the order also stipulates.

The antitrust intervention follows a complaint by Adloox, a French ad verification platform that sells anti-ad-fraud and brand safety services. It complained to the Autorit de la Concurrence about Meta's conduct between 2016 and 2022, accusing the company of denying it the same kind of access to its ecosystem that some of its competitors have been granted, harming its ability to provide its services.

Adloox claims Meta discriminatorily denied it access to the aforementioned viewability and brand safety partnerships despite providing such access to other companies in similar circumstances.

It also accuses Meta of abusing a dominant position by imposing unfair access conditions by providing only partial access to its ecosystem. And its complaint asked the Autorit to impose interim measures intended to force Meta to provide the sought for access.

Read more of this story at SoylentNews.

Vint Cerf, the recipient of the 2023 IEEE Medal of Honor for co-creating the Internet architecture and providing sustained leadership in its phenomenal growth in becoming societys critical infrastructure, didnt have a perfect view of the Internets future. In hindsight, there are a few things he admits he got wrong. Here some of those mistakes, as recently told to IEEE Spectrum:

1) I thought 32 bits ought to be enough for Internet addresses.

And of course, he says, everybody laughs and says, You idiot, why didnt you use 128-bit addresses? The answer is that, back in 1973, people wouldve said, Youre crazy if you think you need 3.4 times 10 to the 38th addresses to do an experiment that you arent sure is going to work. So that was a mistake, although I dont think at the time that I would have been able to sell 128.

2) I didnt pay enough attention to security.

Before public-key cryptography came around, key distribution was a really messy manual process, Cerf says. It was awful, and it didnt scale. So thats why I didnt try to push that into the Internet. And by the time they did implement the RSA algorithm, I was well on my way to freezing the protocol, so I didnt push the crypto stuff. I still dont regret that, because graduate students, who were largely the people building and using the Internet, would be the last cohort of people I would rely on to maintain key discipline, though there are times when I wish we had put more end-to-end security in the system to begin with.

3) I didnt really appreciate the implications of the World Wide Web.

That is, Cerf says, I didnt expect the avalanche of content that went onto the Internet once the Web was made available. And what happened as a result of that avalanche is that we had to invent search engines in order to find stuff, because there was so much of it. I absolutely did not predict that search engines would be needed.

Every now and again we stumble across something a bit unexpected, and today thats the fact that there have been quite a few efforts at launching paper planes from as close to space as possible. The current record for the highest paper plane launch is a whopping altitude of 35,043 meters.

...

Graphene is a special material. Among its many talents, it can act as a superconductor, generate a super-rare form of magnetism, and unlock entirely new quantum states.

Now graphene has another amazing credit: it can record levels of magnetoresistance without a need to push the temperature down towards absolute zero.

High magnetoresistance a materials ability to change its electrical resistance in response to a magnetic field is relatively rare, yet materials that can shift their properties in this fashion are useful in computers, cars, and medical equipment.

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The Code Interpreter is probably the most interesting ChatGPT plugin of OpenAI and opens up completely new capabilities for the Chatbot.

At the end of March, OpenAI introduced a groundbreaking new feature for ChatGPT: Plugins. One of them is a so-called Code Interpreter. With it, the language model can not only generate code, but also execute it independently.

As with Auto-GPT, the busy developer community has found exciting use cases for this technology in a very short time. Especially for data journalism and similar data-based analysis, the tool seems to open up completely new possibilities. This is also due to the possibility of uploading and downloading files up to 100 MB in size.

And it would be hilarious too.

Google has been warned by one of its engineers that the company is not in a position to win the artificial intelligence race and could lose out to commonly available AI technology.

A document from a Google engineer leaked online said the company had done a lot of looking over our shoulders at OpenAI, referring to the developer of the ChatGPT chatbot.

Tesla Full Self-Driving Beta 11.3.6 takes me to a randomly generated point on the map with zero human input required. A lot of people dont realize this is possible today.

Version 4.2 of the Yocto Project distribution builder has been released. It features improved Rust support, a number of BitBake enhancements, lots of updated software, and numerous security fixes.

Thanks to the following commit by Todd Miller (millert@), cron(8) now supports random values in a range with a step value (i.e. "~/" in crontab(5) entries):

CVSROOT:   /cvs
Module name:    src
Changes by:     millert@cvs.openbsd.org 2023/05/06 17:06:27

Modified files:
        usr.sbin/cron  : crontab.5 entry.c macros.h 

Log message:
Support random offsets when using ranges with a step value in cron.
This extends the random range syntax to support step values.  Instead
of choosing a random number between the high and low values, the
field is treated as a range with a random offset less than the step
value.  This can be used to avoid thundering herd problems where
multiple machines contact a server all at the same time via cron jobs.

The syntax is similar to the existing range/step syntax but uses a
random range.  For example, instead of "0-59/10" in the minutes
field, "0~59/10" can be used to run a command every 10 minutes where
the first command starts at a random offset in the range [0,9].
The high and low numbers are optional, "~/10" can be used instead.

Requested by job@, OK phessler@

Via: AwakenWithJP:

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[Kevin] over at Simple DIY ElectroMusic Projects has released a complete DIY modular design for simulating the classic 80s Yamaha TX816 DX/FM modular digital synthesizer. This beast of a synth was used by the cool bands of the 80s as well as TV studios, and ownership of the original machine is an expensive investment. But with the power of modern hackable electronics, and the MiniDexed firmware running bare-metal on a Raspberry Pi getting access to a compatible synth doesnt have to break the bank.

[Kevin] wanted to emulate the look and feel of the original TX816 aesthetic, developing a custom PCB handling the user interface for four of the eight channels, and a second acting as an interface to the Raspberry Pi using a...

With newer generations of Intel client processors having the GuC firmware binaries is now a hard requirement for accelerated graphics support. Like with AMD and NVIDIA GPUs, firmware binaries are a requirement beyond the open-source Linux driver code. This week Intel published their initial GuC firmware binaries for upcoming Meteor Lake processors...

Going back years there has been patches for allowing the Linux x86_64 kernel to build as Position Independent Executable (PIE) code to further enhance the system security. Antgroup engineers most recently have been tackling the Linux x86_64 PIE support and last week sent out a new patch series...

Intel Shaodw Stack support was submitted for Linux 6.4 at the start of the merge window but now with this two-week merge window drawing to a close, it hasn't been pulled yet and Linus Torvalds raised technical issues with the proposed patches that now jeopardize its arrival this cycle...

upstart writes:

As big as a football field and heavier than 200 elephants, de-orbiting the International Space Station represents a monumental challenge:

[...] Drift into the wrong part of the Pacific Ocean in eight years, and you might be in for a shock. Tearing through the sky will be some 400 tonnes (880,000lbs) of metal, set aglow by its re-entry through the atmosphere. This raging inferno will crash into the ocean, across an area maybe thousands of kilometres in length, signalling the end of one of humanity's greatest projects the International Space Station (ISS).

The ISS has been orbiting the Earth since construction on it began in 1998. It has hosted more than 250 visitors from 20 countries since its first crew arrived in November 2000. "The space station has been a huge success," says Josef Aschbacher, the head of the European Space Agency (Esa), one of the more than a dozen partners in the programme. It has been a boon for international collaboration, not least between the US and Russia, who partnered shortly after the fall of the Soviet Union. "It is really one of the big international victories," says Thomas Zurbuchen, Nasa's former head of science.

But much of its hardware is decades old, which could eventually see the station become dangerous or even uncontrollable in orbit a fate that befell the Soviet Union's Salyut 7 space station in 1985, requiring two cosmonauts to revive the tumbling station. "We really don't want to go through that again," says Cathy Lewis, a space historian from the National Air and Space Museum in the US.

To prevent such a catastrophe in space from happening once more, the space station will be deorbited in 2031, bringing it through the atmosphere to safely splash down in the Pacific Ocean. This will be the largest re-entry in history and, in March, Nasa asked Congress for funding to start development of a "space tug" that might be needed to perform the task a spacecraft that can push the station back into the atmosphere. Kathy Leuders, head of Nasa's human spaceflight programme, later revealed it was estimated the tug vehicle would cost just shy of $1bn (800m).

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Hosting companies, CDN platforms and consumer ISPs face an increasing risk of being held liable for the activities of their customers.

At least in theory, copyright law in both the United States and Europe should provide adequate protections for intermediaries but if a chink appears in the armor, nothing can stop rightsholders filing a lawsuit. When they do, things can get very expensive, very quickly.

According to its website, UK-based CDN company DataCamp shifts a lot of data via its CDN77 service; 120 Tbps network capacity over six continents, with 140+ private peerings connecting 3,000+ networks. In February 2022, U.S. broadcaster DISH Network filed a $32.5m lawsuit against DataCamp, claiming that it failed to deal with copyright infringing customers.

Filed in an Illinois district court, the complaint claimed that pirate IPTV services Banjo TV, Bollywood IPTV, Comstar TV, Express IPTV, Gennie TV, Gold TV, IPGuys, Istar, Red IPTV, Sky IPTV, and Zumm TV, were all customers of DataCamp.

DISH said it sent hundreds of notices requesting removal of content under the DMCA, along with copies of lawsuits and judgments relating to pirate IPTV services.

According to DISH, DataCamps response was lacking and since it failed to adopt and reasonably implement a repeat infringer policy despite having servers in the United States, the company could not rely on the safe harbor provisions of the DMCA.

Tactical Leverage Lawsuit

In a motion to dismiss, DataCamp described the DISH lawsuit as a means to gain tactical leverage over alleged direct infringers, i.e the people behind the named IPTV providers.

The company informed the court that knowledge of its customers activities would be technologically impossible since all traffic is completely encrypted, including between the providers and their customers. As for the infringement notices, DataCamp said it forwarded them to the relevant customers since they were best placed to remove any infringing content.

DISH wasted no time filing a response to DataCamps motion to dismiss and DataCamp was equally swift with its own reply. The filings revealed zero progress in the dispute and a canyon between each sides interpretation of where safe harbors end and liability begins.

Confidentiality Agreement

After a couple of weeks of relative calm, the parties agreed on a confidentiality order and from there, nothi...

Anderson Marques has announced the release of Br OS 23.04. Br OS, developed in Brazil, is an Ubuntu-based distribution featuring the KDE Plasma desktop and a set of applications designed for web content creation. This release marks the project's third anniversary. An interesting new feature of the release....

Heres an overview of some of last weeks most interesting news, articles, interviews and videos: Former Uber CSO avoids prison for concealing data breach Joe Sullivan, the former Uber CSO who has been convicted last year for attempting to cover up a data breach Uber suffered in 2016 and kept it hidden from the Federal Trade Commission (FTC), has been sentenced to three years of probation plus 200 hours of community service. Critical RCE vulnerability More

The post Week in review: Fake ChatGPT desktop client steals data, Patch Tuesday forecast appeared first on Help Net Security.

There are plenty of bizarre computers around from the 70s through the 90s before the world somewhat standardized around various duopolies of hardware vendors and operating systems. Commodore, Atari, and even Apple had some bizarre machines from this era but for our money, the most unusual systems come out of the Eastern Bloc. Weve featured plenty of these before, and the latest is a Robotron CM1910 which comes to us from [Chernobyl Family] via YouTube.

Built in East Germany behind the wall, the Robotron factories had easier access to Soviet than western parts, but the latter were also available when necessary. Hence its built on an Intel 8086 processor, which seems common enough for the era, but after opening the case some non-standard construction becomes apparent.

The first is a densely-packed array of circuit boards and wiring, far beyond what a western PC might have included in this time. This also partially explains its massive 25 kg weight. It does include a hard drive, two floppy disk drives, a large dedicated graphics card, and a modem which all contribute as well. The overall design philosophy of the machine was a headscratcher too, which would have involved near-complete dismantli...

Also available via the Gemini protocol at:

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Over HTTP:

With only two space stations in orbit around Earth today in the form of the International Space Station and the Chinese Tiangong (Sky Palace) station, its easy to forget how many space stations were launched in the previous century. And the Soviet Union launched by far the most, as part of the Salyut (Russian for salute or fireworks) program. Although the program entailed both military (Orbital Piloted Station, or OPS) and civilian (Durable Orbital Station, or DOS) stations, it was the civilian stations that saw the most success, as well as the most daring rescue attempt with the recovering of the Salyut 7 space station.

Salyut 7 (DOS-6) was set to repeat Salyut 6s success after its launch on April 19th 1982, until disaster struck in February 1985. Due to a series of electrical and other faults ground communication with the space station was cut off, and the at the time unmanned space station began to gradually tumble towards the Earths atmosphere. This left those in charge with two options: leave the station to burn up in the atmosphere, or stage a rescue mission.

Ultimately, on June 6th, 1985, Soyuz T-13 launched to rendezvous with Salyut 7. On board were cosmonauts Vladimir Dzhanibekov who h...

upstart writes:

New process significantly speeds up 2D transistor production:

A recent MIT paper proposes a new method to "grow" 2D transistors on top of wafers, potentially speeding the production of ultrathin computing materials. The study claims to solve the heating and assembly problems of other methods, possibly opening new avenues for semiconductors.

Manufacturers like Intel, Samsung, and TSMC continually find ways to make ever-smaller transistors to guarantee ongoing increases in processing power each year. TSMC and Samsung have started 3nm semiconductor production as Intel looks forward to counting transistor size in Angstroms, while talk has also shifted to "2D materials" that are only a few atoms thick.

[...] One problem with building the 2D material molybdenum disulfide is heat. Growing some of its components requires temperatures over 550 degrees Celsius, but silicon wafer circuits start decaying beyond 400. Normally, manufacturers graft the 2D material onto the wafer after its production, often leading to imperfections.

The researchers instead grew the material directly onto the wafer with a new kind of kiln that separates part of the cooking process. A high-temperature zone processes the sulfur, after which it flows into the lower-temperature region where the molybdenum and the wafer are kept below 400C. The system leads to more uniform surfaces and faster production.

While the prior method could take an entire day to grow a layer, the new technique can grow a layer in under an hour. The improvement could enable growth across larger surfaces, and the researchers plan to explore stacking layers.

Journal Reference:
Zhu, J., Park, JH., Vitale, S.A. et al. Low-thermal-budget synthesis of monolayer molybdenum disulfide for silicon back-end-of-line integration on a 200mm platform. Nat. Nanotechnol. (2023). https://doi.org/10.1038/s41565-023-01375-6

Original Submission

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Its another lovely day, but Im still not altogether mobile (although my ankle is definitely improving), so what about another day on the couch, reading comics? Sure.

But before I begin readin, I want to natter on a bit about some comics I read the other day:

Yes! After almost 50 years (well, perhaps 45), Tardi has ended his Adle Blanc-Sec series! Its something of a momentous thing I read the first album when I was, like, 12, and now Im, like, old. So its a thing thats been going on, but very intermittently, for the vast majority of my life.

So I spent a day reading the preceding nine albums, along with the two tie-ins (Le Dmon des glaces and Adieu Brindavoine; you really kinda have to read at least the second of those to make sense of what happens in the fifth Adle album, Le secret de la salamandre). Ive read the first five (or seven, if you include the etc) albums many, many times I was a huge Tardi fan as a teenager. The later albums not so much, because who has time when youre a student etc.

I did re-read all Tardi albums (chronologically) about a decade ago, though, but Ive never sat down and had an intense Adle-a-thon: These alb...

When something is described as Low Noise, it is by the nature of the language a relative phrase. The higest quality magnetic tape is low noise compared to its cheaper sibling for example, but still has noise many would consider unacceptable. In instrumentation however, Low Noise has to really mean just that, with a range of specialist techniques to produce circuitry with a truly low noise level for the most demanding of signal applications. As an example [Floydfish] has created a low noise instrumentation amplifier that should serve as a learning exercise for anyone interested in pushing low noise circuitry to the limit.

Anyone who can dredge the hazy recesses of their mind for barely-remembered electronics lectures will know that the overall noise figure of a system is dictated by that of its first component. Thus perhaps the most interesting part of the schematic is at the input, where a row of low-noise op-amps are presented in parallel. We have to admit having to look this one up, to find that its a technique whereby the signal outputs of each chip are the same and thus sum, while the noise output of each is different and thus the summed noise output is proportionally lower. This stage is then followed by a buffer and a s...

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canopic jug writes:

Entertainer Ed Sheeran has been found not guilty of infringing on four chords used in both his song and in Marvin Gaye's hit, "Let's Get It On". The same four-chord sequence is used in a lot of songs and at a key point in the trial a musicologist testified that the same four-chord sequence has been used in popular songs many times prior to Gaye's 1973 hit. The trial took place in Manhattan in New York and the jury took only three hours to reach a unanimous decision. The two songs featured at the trial also have very different lyrics and melodies as well as different use of the common four chords. While the decision does not form a legal precedent, it is likely to affect similar cases in the future.

During her closing argument, Farkas said the case never should have been brought and that Sheeran was "unjustly accused" of copying from "Let's Get It On."

"We all benefit from artists being free to create and to build on what came before them," Farkas said, warning the jury that a verdict against Sheeran would mean "creativity will be stifled for fear of being sued."

--ABC

Also

"I am just a guy with a guitar who loves writing music for people to enjoy," he added. "I am not and will never allow myself to be a piggy bank for anyone to shake."

--New York Times

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Dehai Zhao, Zhenchang Xing, Xin Xia, Deheng Ye, Xiwei Xu, and Liming Zhu. Seehow: workflow extraction from programming screencasts through action-aware video analytics. 2023. arXiv:2304.14042.

Programming screencasts (e.g., video tutorials on Youtube or live coding stream on Twitch) are important knowledge source for developers to learn programming knowledge, especially the workflow of completing a programming task. Nonetheless, the image nature of programming screencasts limits the accessibility of screencast content and the workflow embedded in it, resulting in a gap to access and interact with the content and workflow in programming screencasts. Existing non-intrusive methods are limited to extract either primitive human-computer interaction (HCI) actions or coarse-grained video this http URL this work, we leverage Computer Vision (CV) techniques to build a programming screencast analysis tool which can automatically extract code-line editing steps (enter text, delete text, edit text and select text) from screencasts. Given a programming screencast, our approach outputs a sequence of coding steps and code snippets involved in each step, which we refer to as programming workflow. The proposed method is evaluated on 41 hours of tutorial videos and live coding screencasts with diverse programming environments. The results demonstrate our tool can extract code-line editing steps accurately and the extracted workflow steps can be intuitively understood by developers.

Zachary A. Pardos, Matthew Tang, Ioannis Anastasopoulos, Shreya K. Sheel, and Ethan Zhang. OATutor: an open-source adaptive tutoring system and curated content library for learning sciences research. In Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems. ACM, Apr 2023, doi:10.1145/3544548.3581574.

Despite decades long establishment of effective tutoring principles, no adaptive tutoring system has been developed and open-sourced to the research community. The absence of such a system inhibits researchers from replicating adaptive learning studies and extending and experimenting with various tutoring system design directions. For this reason, adaptive learning research is primarily conducted on a small number of proprietary platforms. In this work, we aim to democratize adaptive learning research with the introduction of the first open-source adaptive tutoring system based on Intelligent Tutoring System principles. The system, we call Open Adaptive Tutor (OATutor), has been iteratively developed over three years with field trials in classrooms drawing feedback from students, teachers, and researchers. The MIT-licensed source code includes three creative commons (CC BY) textbooks worth of algebra problems, with tutoring supports authored by the OATutor project. Knowledge Tracing, an A/B testing framework, and LTI support are included.

Jos Manuel Snchez Ruiz, Francisco Jos Domnguez Mayo, Xavier Oriol, Jos Francisco Crespo, David Benavides, and Ernest Teniente. A benchmarking proposal for devops practices on open source software projects. 2023. arXiv:2304.14790.

The popularity of open-source software (OSS) projects has grown significantly over the last few years with more organizations relying on them. As these projects become larger, the need for higher quality also increases. DevOps practices have been shown to improve quality and performance. The DORA benchmarking reports provide useful information to compare DevOps practices performance between organizations, but they focus on continuous deployment and delivery to production, while OSS projects focus on the continuous release of code and its impact on third parties. The DORA reports mention the increasing presence of OSS projects as they are widely used in the industry, but they have never been used to measure OSS projects performance levels. This study reveals that the DORA benchmark cannot be applied to OSS projects and proposes benchmarking metrics for OSS projects, being the first one that adapts the DORA metrics and applies them in OSS projects. The metrics proposed in this study for benchmarking OSS projects include Release Frequency and Lead Time For Released Changes to measure throughput, and Time To Repair Code and Bug Issues Rate to assess stability. In contrast to the DORA reports, where data is collected through manual surveys, in our proposal, data is collected automatically by a tool we developed that retrieves information from public GitHub repositories. This reduces the risk of survey-based data collection. Our study also shows the benchmark feasibility by applying it to four popular OSS projects: Angular, Kubernetes, Tensorflow, and VS Code. In addition, we proposed challenges that address the topics and future works to expand the knowledge and findings of this study. Overall, the findings of the study can help to improve future research on OSS projects and provide a better understanding and challenges of the role of DevOps practices in OSS projects.

On its face, 3D printing is pretty simple its basically just something to melt plastic while being accurately positioned in three dimensions. But the devil is in the details, and there seems to be an endless number of parameters and considerations that stand between the simplicity of the concept and the reality of getting good-quality prints.

One such parameter that had escaped our attention is pressure advance, at least until we ran into [Mike Abbott]s work on automating pressure advance calibration on the fly. His explanation boils down to this: the pressure in a 3D printer extruder takes time to both build up and release, which results in printing artifacts when the print head slows down and speeds up, such as when the print head needs to make a sharp corner. Pressure advance aims to reduce these artifacts by adjusting filament feed speed before the print head changes speed.

The correct degree of pressure advance is typically determined empirically, but [Mike]s system, which he calls Rubedo, can do it automatically. Rubedo uses a laser line generator and an extruder-mounted camera (a little like this one) to perform laser triangulat...

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A security problem caused the public sharing of private tweets sent to Twitter Circles to users outside of the Circle, the company admitted.

Since August 2022, the Twitter Circle feature allows users to send tweets to a restricted circle of users, these messages are not visible to Twitter users outside the Circle.

As reported by BleepingComputer, around April 7, some Twitter users noticed the issue. The Guardian reported that for weeks users had been reporting Circles tweets receiving likes and views from users outside the circle.

The social network giant confirmed the problem, it started notifying the impacted users.

Were contacting you because your Twitter account may have been potentially impacted by a security incident that occurred earlier this year (April 2023), reads a security incident notification sent by Twitter to the impacted users. In April 2023, a security incident may have allowed users outside of your Twitter Circle to see tweets that should have otherwise been limited to the Circle to which you were posting. This issue was identified by our security team and immediately fixed so that these tweets were no longer visible outside of your Circle.

Weve conducted a thorough investigation to understand how this occurred and have addressed this issue. Twitter is committed to protecting the privacy of the people who use our service, and we understand the risks that an incident like this can introduce and we deeply regret this happened.

The company did not provide details about the security incident.

Since Elon Musk took ownership of the company, a large portion of its staff left the company and at the same time, the platform introduced multiple changes to its code.

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Emulators are easy and convenient, but for some retrocomputing enthusiasts nothing comes close to running classic software on actual era-appropriate hardware. This can become a problem, though, for those into vintage PC gaming: old PCs and their monitors are notoriously large and heavy, meaning that even a modest collection will quickly fill up a decent family home. There is a solution however, as [The Eric Experiment] demonstrates in his latest video. He designed and built a 3D-printed mini PC that runs on an actual 486 processor.

An ordinary desktop motherboard would have required a rather large case to begin with, so [Eric] started his project by buying an old industrial PC board. Such a device has the processor and all main motherboard components sitting on an ISA card, which then connects to other ISA cards through a backplane. This way, a complete system with expansion cards can be made way more compact than even the sleekest desktop PCs of the time. An SD-card-to-IDE converter makes for an extremely slim hard drive replacement, while a Gotek floppy emulator allows the system to boot as if theres actually a floppy drive present.

hubie writes:

Researchers show the positive impacts of musical activities to counteract brain ageing:

Normal ageing is associated with progressive cognitive decline. But can we train our brain to delay this process? A team from the University of Geneva (UNIGE), HES-SO Geneva and EPFL has discovered that practicing and listening to music can alter cognitive decline in healthy seniors by stimulating the production of grey matter. To achieve these results, the researchers followed over 100 retired people who had never practiced music before. They were enrolled in piano and music awareness training for six months. These results open new prospects for the support of healthy ageing. They are reported in NeuroImage: Reports.

Throughout our lives, our brain remodels itself. Brain morphology and connections change according to the environment and the experiences, for instance when we learn new skills or overcome the consequences of a stroke. However, as we age, this ''brain plasticity'' decreases. The brain also loses grey matter, where our precious neurons are located. This is known as ''brain atrophy''.

Gradually, a cognitive decline appears. Working memory, at the core of many cognitive processes, is one of the cognitive functions suffering the most. Working memory is defined as the process in which we briefly retain and manipulate information in order to achieve a goal, such as remembering a telephone number long enough to write it down or translating a sentence from a foreign language.

[...] The participants were randomly assigned to two groups, regardless of their motivation to play an instrument. The second group had active listening lessons, which focused on instrument recognition and analysis of musical properties in a wide range of musical styles. The classes lasted one hour. Participants in both groups were required to do homework for half an hour a day.

Read more of this story at SoylentNews.

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