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today's leftovers

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  • Looking into the future of collaborative commons | Opensource.com

    I read Jeremy Rifkin's book The Zero Marginal Cost Society: The Internet of Things, the Collaborative Commons, and the Eclipse of Capitalism, which has a strong connection to open organization principles, particularly community building. Rifkin also writes about the future of green energy generation and energy use in logistics. In the previous articles in this series, I wrote about the communication internet being joined by the advancement of the energy (producing, sharing, consuming) internet. In this final part of the series, I look at Rifkin's thoughts regarding logistics (moving, storing, sharing) internet, and other economic sectors.

    There are public transportation systems like roads, commuter trains, light rail, and buses that are supported by taxes. There are also private transportation options such as private ocean shipping companies, private cars, bicycles, and walking. All these modes of transportation will go through changes with an IoT standardized system that communicates with many moving vehicles. This will make movement of both people and goods more efficient (less waste and more full utilization of capacity). Established protocols will allow firms to collaborate with each other to a more detailed degree. Furthermore, inventory storage will become more efficient. Redundancies and inefficiencies will be identified and reduced.

    This can be achieved by a distributed, collaborative, laterally scaled internet communication system, with its open system configuration and commons-style management, as a model for radically transforming global logistics.

  • 17 open-source, free Habit tracker apps for Windows, Android, Linux, macOS and the web

    The habit is something you usually do on a regular basis. It can be a part of a regular routine for work, lifestyle or both.

    Let us say, like morning work, exercise, reading newspaper, and brushing your teeth.

    There are good habits and bad habits, and as an example: smocking is a bad habit, drug addiction starts as a bad habit.

  • Canonical attends World Data Summit 2022

    Canonical, the publisher of Ubuntu, joined the World Data Summit held in Amsterdam, Netherlands, last May 18-20, 2022. Michelle Anne Tabirao, Data Solutions Product Manager, participated as a speaker in a technical workshop and a panel discussion.

  • Vanilla Dpup and Upup progress

    They have also been developing a more traditional next-generation Puppy, pre-fixed "Vanilla-"; currently there is Vanilla-Upup and Vanilla-Dpup, based on Ubuntu and Debian packages respectively. These have an initrd.

  • New Steam Games with Native Linux Clients - 2022-05-24 Edition - Boiling Steam

    We are publishing this update a little late this time, but there’s quite a lot of new titles! Between 2022-05-17 and 2022-05-24 there were 44 New Steam games released with Native Linux clients. For reference, during the same time, there were 448 games released for Windows on Steam, so the Linux versions represent about 9.8 % of total released titles.

  • Stupid RCU Tricks: Is RCU Watching? - Paul E. McKenney's Journal — LiveJournal

    It is just as easy to ask why RCU wouldn't be watching all the time. After all, you never know when you might need to synchronize!

    Unfortunately, an eternally watchful RCU is impractical in the Linux kernel due to energy-efficiency considerations. The problem is that if RCU watches an idle CPU, RCU needs that CPU to execute instructions. And making an idle CPU unnecessarily execute instructions (for a rather broad definition of the word “unnecessary”) will terminally annoy a great many people in the battery-powered embedded world. And for good reason: Making RCU avoid watching idle CPUs can provide 30-40% increases in battery lifetime.

    In this, CPUs are not all that different from people. Interrupting someone who is deep in thought can cause them to lose 20 minutes of work. Similarly, when a CPU is deeply idle, asking it to execute instructions will consume not only the energy required for those instructions, but also much more energy to work its way out of that deep idle state, and then to return back to that deep idle state.

    And this is why CPUs must tell RCU to stop watching them when they go idle. This allows RCU to ignore them completely, in particular, to refrain from asking them to execute instructions.

  • AmigaOne X1000/X5000 Remains Well Supported With PowerPC Linux

    Despite being expensive and having been sold out for quite some time at the main Amiga Dealers, two days after Linus Torvalds' release of Linux 5.18, Christian "xeno74" Zigotzky made the latest PPC kernel available for the AmigaOne X1000/X5000. Here and here are some screenshots. Linux PPC performs well on AmigaOne computers. For example, here is a 5-year-old YouTube AmigaOne X5000 demonstration video.

  • How to select your embedded systems operating system: OS characteristics - Embedded.com

    Embedded system developers have a wide range of operating systems available to them today. Of course, the most straightforward operating system is to have no operating system! However, many systems today are complex, connected systems where an operating system might be required. When required, developers will often look to use a real-time operating system (RTOS) or Linux to help them manage the complexity. Unfortunately, it’s not always clear-cut how to choose between bare metal, RTOS, or Linux. Each option has its advantages and disadvantages.

More in Tux Machines

Black Box is a GTK4 Terminal App With Unique Look

Tired of the standard GNOME Terminal but cool on its successor Console? You’ll definitely want to check in with Black Box. Black Box is a new GTK4 terminal emulator built in Vala and GTK4. The debutant release on Flathub has all of the core features you’d expect, plus a large dose of ones you might not. Yes, this app has a few innovative UI approaches that make it stand out from the (many) terminal apps already available for Linux desktops. I do think of Black Box as the “eye candy terminal”. It may sound like contradiction given that CLIs are usually focused on raw function (and it may sound like a negative, but it’s not; things are allowed to look nice). Thing is, Black Box isn’t afraid to be ‘beautiful’, as its immersive ‘headerbar-less’ mode proves. When enabled this gives every inch of the console’s canvas over to whatever command is running. Read more

Linux 5.19-rc5

So last week, we had a rc4 that was slightly larger than normal, and
while I thought it was mostly just due to timing and pull requests
shifting between rc's, I wanted to keep an eye on it.

And this week, we have an rc5 that is slightly _smaller_ than normal,
so it all pans out and really does just look like just random timing
noise.

So everything looks ok - we certainly have some issues still being
looked at, but on the whole 5.19 looks normal, and nothing
particularly bad seems to be going on.

See the shortlog below for details, but nothing here looks very odd.
It's the usual mixture of driver fixes, arch updates, filesystems and
networking. And associated tooling and selftests.

The diffstat shows a couple of blips - random number handling fix and
simplification in s390, a couple drivers, and some patches to fs code
that are not exactly one-liners (copy_file_range fix, some xfs fixes),
and some mptcp fixes.  But none of it is huge by any means, and most
of the rest of commits are one- or few-liners.

So in between the general summer vacation (Europe) and the July 4th
extended weekend (US), and whatever the rest of the world is doing -
take some time off, build a new kernel and boot it. Just to verify
things are looking ok for you. But it should all be pretty calm.

             Linus
Read more

today's leftovers

  • RFID and Raspberry PI: RC522 wiring and code with Python

    RFID systems are common in our lives as they are widely used to secure access, monitor objects’ positions (IoT) and a lot of other applications. Their technology is so mature that they are today reliable components and easy to use. The RC522 module with Raspberry PI can bring to your hands this technology with a few steps and a cheap budget In this tutorial, I’m going to show you how to connect and configure a Raspberry PI with an RFID RC522 module, using Python.

  • This DIY basketball scoreboard looks and sounds like the real thing | Arduino Blog

    Inspired by his time as a scorekeeper in elementary school, now-high schooler Collin Wentzien wanted to recreate this setup by building a DIY scoreboard several years ago. His idea involved making a bright display composed of several seven-segment displays that could all be controlled by an external device in order to set scores, start/stop the clock, and more. The controller sits inside of a small custom box that contains a pair of button matrices, which either increment the score for the home/guest team or provides a keypad that can be used to enter numerical values and set the clock. Below its custom PCB is an Arduino Mega 2560 that handles all of the button inputs, along with a character LCD for showing what has been entered and an nRF24L01+ wireless transceiver for sending new data to the scoreboard.

  • What Metric to Use When Benchmarking?

    What is the right metric to use when measuring a program's performance? There are various possibilities, from memory usage to branch prediction hit rates, but I'm going to pick on two that I see widely used: CPU instructions executed (what modern CPUs call "instructions retired") and wall-clock time (i.e. "how much time has elapsed in the real world?"). In this post, I'm going to try and compare both, showing why each has fundamental weaknesses, before explaining why I use each in different circumstances.

  • Linux Weekly Roundup #189

    Welcome to this week's Linux Weekly Roundup. We had a full week in the world of Linux releases with ArcoLinux 22.07.03, Nitrux OS 20220629, Pisi Linux 2.3, and Condres OS 1.0.

  • What if WordPress Didn’t Exist?

    WordPress powers like 40% of the internet or something, so I don’t think it will be going anywhere anytime soon. But what if Matt and the team decide to go in a direction I don’t agree with, like Ghost have? My knee-jerk reaction would be to go back to Jekyll – it’s light and I know it fairly well. But like I said, managing content is painful and Ruby can be a bit of pig to manage.

Programming Leftovers

  • A Major Contribution to Learning R

    Prominent statistician Frank Harrell has come out with a radically new R tutorial, rflow. The name is short for “R workflow,” but I call it “R in a box” –everything one needs for beginning serious usage of R, starting from little or no background. By serious usage I mean real applications in which the user has a substantial computational need. This could be a grad student researcher, a person who needs to write data reports for her job, or simply a person who is doing personal analysis such as stock picking. Like other tutorials/books, rflow covers data manipulation, generation of tables and graphics, etc. But UNLIKE many others, rflow empowers the user to handle general issues as they inevitably pop up, as opposed to just teaching a few basic, largely ungeneralizable operations. I’ve criticized the tidyverse in particular for that latter problem, but really no tutorial, including my own, has this key “R in a box” quality.

  • The deep learning obesity crisis - Vincent Lequertier's blog

    Deep learning have made dramatic improvements over the last decades. Part of this is attributed to improved methods that allowed training wider and deeper neural networks. This can also be attributed to better hardware, as well as the development of techniques to use this hardware efficiently. All of this leads to neural networks that grow exponentially in size. But is continuing down this path the best avenue for success? Deep learning models have gotten bigger and bigger. The figure below shows the accuracy of convolutional neural networks (left) and the size and number of parameters used for the Imagenet competition (right). While the accuracy is increasing and reaching impressive levels, the models get both bigger and use more and more resources. In Schwartz et al., 2020, as a result of rewarding more accuracy than efficiency, it is stated that the amount of compute have increased 300k-fold in 6 years which implies environmental costs as well as increasing the barrier to entry in the field.

  • Mint: A New Programming Language for Building Single Page Apps (SPAs)

    Mint is a refreshing programming language for the front-end web development. It is developed and maintained by a large community of experienced developers.

  • Understanding Have I Been Pwned's Use of SHA-1 and k-Anonymity

    Four and a half years ago now, I rolled out version 2 of HIBP's Pwned Passwords that implemented a really cool k-anonymity model courtesy of the brains at Cloudflare. Later in 2018, I did the same thing with the email address search feature used by Mozilla, 1Password and a handful of other paying subscribers. It works beautifully; it's ridiculously fast, efficient and above all, anonymous.