Teaching Robotics with ROS on Ubuntu at SRU

This week, as part of my work on the Ubuntu Robotics team, I headed up to Slippery Rock University in northwestern PA to meet with Dr. Sam Thangiah and to introduce students to the Robot Operating System (ROS).  New semester, lots of new opportunities for learning!

<div>How to protect your data, applications, cryptography and OS &#8211; 100% of the time</div>

security, ubuntu, IBM, data, protection, OS

Businesses looking to maximise the security, reliability, efficiency and performance of their essential, mission-critical applications are recognising the mainframe as a robust platform for a variety of workload types.

Volna Wins Plasma 5.18 Wallpaper Contest

Volna by Nikita Babin wins KDE's 2nd Wallpaper contest. Volna will be upcoming Plasma 5.18's default wallpaper.

Congratulations to Nikita for the win. Nikita will receive the Grand prize, a TUXEDO Infinity Book 14 featuring an i7 Intel processor and an all-day battery with a 12-hours capacity.

We would like to extend our congratulations also to the artists that made the finals, specifically (and in no particular order): metalbender and the spacey Milky Way wallpaper; CaceK, who created the dramatic Breach / Crystaline; Luwx submitted the cool looking Iridescent Shell; The Grand Canyon was designed by kevintee; and the winner of the Plasma 5.16 wallpaper competition, Santiago Cezar, also made it to the finals with Vera. They will each receive a package containing a KDE-branded baseball cap, a plush Tux, KDE stickers, a frozen glass coffee mug and more goodies.

We saw many high-quality entries in this contest and it has been difficult to select six finalists and even harder to choose a winner. We are incredibly proud of the great community that decided to contribute in making Plasma a great desktop and we hope that the artists who joined the competition, even if they didn't win, will become regular contributors to the Visual Design Group and help make Plasma even better.

The 5.18 wallpaper contest ends today, but if you still want to try and win some amazing prizes, don't forget about the other two contests that are currently ongoing: the Plasma Video Contest, the winner of which will receive a PC with a powerful Intel core i7, 16GB of RAM, 250GB NVMe SSD, 2TB HDD and an Nvidia GTX1050Ti video card as the prize; and the Applications Video Contest, which has a PC featuring an Intel core i3, 16GB of RAM and 250GB SSD as the prize.

We would also like to thank TUXEDO for sponsoring the competition and for donating all the prizes.

Looking for video editing software? The Snap Store has some nice apps for you.

In the past decade, video has become the most ubiquitous method of communication on the Web. Video clips are used for pretty much anything, from short software tutorials to hours-long live online gaming streaming. In some cases, the use of “moving pictures” might not be the best communication medium, but there is no denying the popularity of the video in everyday life.

Migrating to enterprise servers with Ubuntu on IBM Z

Private Cloud Build

For mission-critical applications, security, reliability, and efficiency are essential. Linux excels in these areas, which is why it has become a highly popular platform for supporting key enterprise software. And for businesses looking to push the security and performance of their Linux-based applications even further, the next step is enterprise server computing.

<div>Ubuntu Server development summary &#8211; 21 January 2020</div>

Hello Ubuntu Server

The purpose of this communication is to provide a status update and highlights for any interesting subjects from the Ubuntu Server Team. If you would like to reach the server team, you can find us at the #ubuntu-server channel on Freenode. Alternatively, you can sign up and use the Ubuntu Server Team mailing list or visit the Ubuntu Server discourse hub for more discussion.

KDE Receives Generous Donation from the Handshake Foundation

We are excited to announce that KDE e.V. has received a donation of 880,000 HNS coins (roughly 79,000 euros) from the Handshake Foundation.

This is the not the first time Handshake has made a substantial donation to the KDE Community. Back in 2018 Handshake donated approximately 300,000 euros to KDE which was used to finance projects and fund activities.

"The Handshake Naming System is a child of the Open Source Community", says Andrew Lee from the Handshake Foundation. "Just like Handshake, KDE has championed privacy and freedom since the beginning and has paved the way forward in creating usable tools made for the masses.

"Personally, I've used KDE software since the early 2000s, and I've seen it grow and flourish. I think, many people today would be surprised to hear that Apple Safari, for example, was based originally on Konqueror, a web browser created by the KDE Community. The Handshake Naming System is proud to be able to make a donation to the KDE team. It is our way of showing appreciation for KDE, as much of the development in the Open Source world would not have been possible without it."

KDE would like to thank the Handshake Foundation for their continued generosity and the support they offer to FLOSS communities across the spectrum. This contribution will help KDE continue with its commitment to create Free Software for everyone, finance events and sponsor community members.

You can help KDE too! All you need to do is join the Community and be part of our mission to help people maintain their privacy and their control over their digital lives with Free Software.

---

Photo by Cytonn Photography on Unsplash.

problem-oriented

Once upon a time, Heathkit was a big business.

Yeah, I know I’m dating myself. Meh.

Anbox Cloud disrupts mobile user experience

With the launch of the iPhone in 2007, mobile users were introduced to the smartphone as we still know it today: touchscreen, cameras and app stores. The launch of Android spurred low-cost alternatives to the iPhone, bringing the smartphone to the masses. Popularisation and growth in app consumption drove demand for mobile broadband.

So you want to make a KDE video...

KDE is running a competition in search of the next great promotional video for KDE's Plasma desktop and KDE's applications.

The prizes are two fantastic TUXEDO computers, one per category, which will undoubtedly boost your film rendering capacity. There are also 12 goodie packages for runner-ups, and who doesn't need more Linux shirts, caps and stickers?

Although we have already received some interesting entries, we feel it may be time to help video artists out there with ideas from the judges themselves.

Below, Julian Schraner, Ivana Isadora Devčić, and Paul Brown from the Promo team and Farid Abdelnour from the Kdenlive team give their views on what a KDE promotional video should look like, where to find resources, and which pitfalls may hurt your film if you fall for them.

Julian

I have five simple recommendations for participants:

  1. Avoid videos that contain only screencasts
  2. Break the mold, be creative
  3. Use motion graphics techniques (have a look at animation nodes)
  4. Choose a good catchy song and work on that editing
  5. Make it short, make sure there is something happening in every single frame. Cut out lulls -- they're boring

Ivana

Here's my list of things I would recommend doing, as well as what to avoid:

  • No slideshows, please! Don't make the video look like someone animated a PowerPoint presentation with zoomed-in screenshots sliding into view and fading out. That just looks cheap and low-effort.
  • Don't overdo it with memes and attempts at humor. As amusing as it may be to you and your 3 friends, things like that do not always translate well across cultures and generations. It's OK to add a cheeky moment if it's appropriate with the general theme of your video, but trying to make the entire video "funny" might send the message that you think Plasma is a joke.
  • It's OK to include real, actual people in the video. Anyone can easily make a screencast, but it takes effort - and shows that you made an effort! - to film people using Plasma. Including clips of people using Plasma can make a much stronger impact than just showing the desktop, even if the clips are short.
  • This is very, very basic and Captain Obvious-style, but: background music can have this cool thing called volume. Playing with volume can add depth and variety to your video. Make the background music louder in some parts and softer in others, depending on the effect you're trying to achieve. If it's always the same, the entire video can easily seem monotonous, even if it's only a minute long.
  • If possible, don't use computer-generated voices for voice-overs in the video (that is, if you're going to have any at all). 98% of them sound really fake and distract from the actual content, or just make the video sound boring. Even if you don't have a particularly radio-friendly voice, it will still sound more natural and normal if you record yourself (or try asking someone to help).
  • Great videos tell a story; they're not just a semi-connected list of clips with background music tacked on. Try to develop a little story that sends a specific message instead of just showing random Plasma features. It's also very easy to fall into the trap of comparing Plasma to something else and disparaging other DEs, so please try to avoid that.
  • Personally, I do not want to see "wobbly windows" in any of the videos. Plasma is more than just KWin effects; we're looking for videos that will make people think "wow, this could be really useful to me, I wanna try it", not "haha that's a cool gimmick, I bet I can move the mouse fast enough to break it".

Another important thing - if the video does have any narration/voice-over, I would ask that you include subtitles (at least as a separate file, if hard-coding them is a bad practice). Accessibility is a must!

Paul

I've split my recommendations into 3 parts: the footage you can use, the music (and other sounds), and the editing; that is, the raw materials and how you put them together.

Footage

Like Ivana, I would personally like to see some live action mixed in with the screencasts. You can grab your phone, and go and film something you can then work into the story. Or you can also take some public domain footage from the Internet Archive.

If you look at Real LifeTM advertisements, they don't only show the product, they also show people doing stuff with the product. Most of our videos are already a bunch of screencasts chained together. I want to see something different.

That said, when you do insert screencast footage, make sure you show something interesting happening in the applications. Don't show an empty folder in Dolphin, a blank square in Krita, or a boring, text-only document in Okular. Make sure there's some color in there and that you can see the user doing something.

As for footage of people, try to avoid stock footage, especially those clips that show smartly dressed white people looking at a computer screen, pointing and smiling. It's like the stock photos of women laughing at salads: you see that kind of stuff everywhere and it looks soooo fake. It is nearly as bad as stock music. Nearly...


"My salad is hilarious!"

Another thing to take into account is that you have to be careful with copyrights! Anything that has not been published before 1924 and doesn't have an explicit free license or isn't explicitly in the public domain, is under a regular copyright and may not be used without the authors' or the copyright holders' express written permission. Also, make sure the person distributing the work is the owner of the work. Don't blindly trust a random Youtuber!

TIP: Apart from the Internet Archive, many public institutions publish footage for free on the Internet. One such organization that comes to mind is NASA.

Music

The best way to make me switch off a video after a few seconds is by choosing the "wrong" music. Ironically, "the wrong music" is often that heartless, bland music used in nearly every single corporate video. I swear I would prefer to have hot wax poured into my ears rather than listen to another hokey, fake-quirky ukulele theme in my life.


The best kind of ukelele.

Conversely, sometimes what may seem the wrong music is in fact the right music. Stuff that you can't imagine going together, goes together. Salsa for Spectacle, flamenco for Falkon and power-pop for Plasma? Why not?

Again, be careful with copyrighted stuff. The same thing that applies to footage, applies to music. Besides, just because Johann Sebastian Bach died 300 years ago, doesn't mean that you can use that Von Karajan recording of his Cantatas: the recording itself will be copyrighted.

Most artists on Jamendo release their music under a liberal license as long it is not used for commercial purposes. And making a video for a competition organized by a non-profit that will not generate any money for you or for the non-profit IS NOT a commercial purpose. Also check out Free Music Archive and especially Juanitos: They make great, fun retro pseudo-ethnic music and distribute it under very generous terms.

On the other hand, go easy with Incompetech -- his music can be lovely, but it is EVERYWHERE. If you must use one of his tracks, make sure you poke around and go for his less obvious stuff.

TIP: If you need a voice-over but are not confident that your own voice will sound okay, try Fiverr. For a few dollars, you can have a professional actor read out your script.

Editing

Avoid canned transitions that come as standard with your video-editing software (Kdenlive, right?). They may impress your parents, but everybody else thinks they're lazy.

Related to the above, avoid excessively flashy transitions, even if they are original. I am personally guilty of using animations to transition from one scene to another, but if they are not part of the story, they can draw attention to themselves and away from the real content, distracting the viewer. Most of the time, nothing beats a good clean cut.

The same goes for effects: don't overdo them! Effects are great to confer atmosphere, but if they are not doing that, they are just distracting from the story, and more often than not, make the action harder to follow. Here's looking at all those "editors" that place a screencast into the picture of a monitor! Yes, I get it: you do masks. So does everybody.

TIP: If you do need effects for your video, don't limit yourself to the catalogue supplied by your editing software. Check out things like Blender and Natron -- these programs are used a lot for effects and filters for a reason.

Farid

Apart from everything mentioned above, I would encourage participants to look into using motion graphic techniques rather than sticking to simple transitions when possible. For that, you can use tools like Blender's Animation Nodes addon.

Something that is often overlooked is the matter of typography. Choose your fonts wisely! If you have text on the screen, avoid the default bland fonts. Go to Font Squirrel or Google Fonts for a great selection of free and open types to choose from.


Same goes for video titles.

If you need footage, check out Pexels it contains a lot of high quality clips for free.

About KDE's Video Contest

KDE is looking for talented videographers and filmmakers that will help promote our free software through the medium of video. There are two categories in this contest: in the Plasma category we want participants to create a video that will promote KDE's Plasma desktop to the world. The Applications category is to help promote one or several KDE applications.

Submissions must be sent in before the 20th of February 2020. To find out more, check out the full rules.

Design and Web team summary – 17 January 2020

The second iteration of this year is the last one before our mid-cycle sprint next week.

Here’s a short summary of the work the squads in the Web & Design team completed in the last 2-week iteration.

5 key steps to take your IoT device to market

Bring your IoT device to market

IoT businesses are notoriously difficult to get off the ground. No matter how good your product is or how good your team is, some of the biggest problems you will face are just in getting to market and maintaining your devices once they’re in the field.

Plasma 5.18 LTS Beta



Plasma 5.18 LTS Beta

KDE Plasma 5.18 LTS Beta

Thursday, 16 January 2020.

The Plasma 5.18 LTS Beta is out!

This new version of your favorite desktop environment adds neat new features that make your life easier, including clearer notifications, streamlined settings for your system and the desktop layout, much improved GTK integration, and more. Plasma 5.18 is easier and more fun, while at the same time allowing you to do more tasks faster.

Apart from all the cool new stuff, Plasma 5.18 also comes with LTS status. LTS stands for "Long Term Support" and this means 5.18 will be updated and maintained by KDE contributors for the next couple of years (regular versions are maintained for 4 months). So, if you are thinking of updating or migrating your school, company or organization to Plasma, this version is your best bet. You get the most recent stable version of Plasma for the long term.

Read on to discover everything that is new in Plasma 5.18 LTS…

Plasma



Emoji Selector

Emoji Selector


Customize Layout Global Settings

Customize Layout Global Settings



GTK Apps with CSD and Theme support

GTK Applications with CSDs and Theme Integration



Night Color System Tray Widget

Night Color System Tray Widget

  • Emoji Selector that can be opened through the application launcher or with the Meta + . keyboard shortcut
  • New global edit mode which replaces the desktop toolbox button and lets you easily customize your desktop layout
  • Improved touch-friendliness for the Kickoff application launcher and widget editing
  • Support for GTK applications which use Client Side Decorations, adding proper shadows and resize areas for them
  • GTK apps now also automatically inherit Plasma's settings for fonts, icons, cursors and more.
  • There's a new System Tray widget for toggling the Night Color feature and by default it automatically appears when it's on
  • More compact design to choose the default audio device in the Audio Volume System Tray widget
  • Clickable volume indicator and tooltip item highlight indicators in the Task Manager
  • Circular Application Launcher menu user icon
  • Option to hide the lock screen clock
  • It's now possible to configure keyboard shortcuts that turn Night Color and Do Not Disturb mode on or off
  • Windy conditions shown in weather widget


Notifications



Draggable Download File Icon

Draggable Download File Icon



Low Bluetooth Battery

Bluetooth Device Battery Low Notification


  • The timeout indicator on notification popups has been made circular and surrounds the close button
  • A draggable icon in the "file downloaded" notification has been added, so you can quickly drag it to places
  • Plasma now shows you a notification warning when a connected Bluetooth device is about to run out of power


System Settings



User Feedback

User Feedback


Application Style

Application Style

  • Plasma gained optional User Feedback settings (disabled by default), allowing you to give us detailed system information and statistics on how often individual features of Plasma you use
  • Added a slider for the global animation speed
  • Redesigned Application Style settings with a grid view
  • Improved the search in the system settings sidebar
  • An option to scroll to clicked location in the scrollbar track has been added
  • The System Settings Night Color page has a clearer user interface now


Discover



Reading and Writing Review Comments

Reading and Writing Review Comments

  • Discover's default keyboard focus has been switched to the search field
  • It's now possible to search for add-ons from the main page
  • Added nested comments for addons
  • Made design improvements to the sidebar header and reviews


More



NVIDIA GPU stats

NVIDIA GPU stats

  • Decreased the amount of visual glitches in apps when using fractional scaling on X11
  • Made it possible to show NVIDIA GPU stats in KSysGuard


New Since 5.12 LTS

For those upgrading from our previous Long Term Support release here are some of the highlights from the last two years of development:

  • Completely rewritten notification system
  • Plasma Browser Integration
  • Many redesigned system settings pages, either using a consistent grid view or just an overhauled interface
  • Global menu support for GTK applications
  • Display Management improvements including new OSD and widget
  • Flatpak portal support
  • Night Color feature
  • Thunderbolt Device Management

Full Plasma 5.18 LTS Beta changelog


Live Images

The easiest way to try it out is with a live image booted off a USB disk. Docker images also provide a quick and easy way to test Plasma.

Download live images with Plasma 5
Download Docker images with Plasma 5

Package Downloads

Distributions have created, or are in the process of creating, packages listed on our wiki page.

Get KDE Software on Your Linux Distro wiki page

Source Downloads

You can install Plasma 5 directly from source.

Community instructions to compile it
Source Info Page

Feedback

Discuss Plasma 5 on the KDE Forums Plasma 5 board.

You can provide feedback direct to the developers via the Plasma Matrix chat room, Plasma-devel mailing list or report issues via bugzilla. If you like what the team is doing, please let them know!

Your feedback is greatly appreciated.

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