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* Home
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  Hi, I'm Marcel Kapfer, also known as mmk2410. When I have time I invest it in creative work. As part of that I compose music (have a look at [[https://marcel-kapfer.de][marcel-kapfer.de]] for that), train myself in doing graphic design or write text as well as code.

  These pages are (currently) focused on the computer-based parts of my life (like software development, operating systems and similar stuff).
  Since about 2012 I am mainly using Linux (some times exclusively, although currently not).
  In 2014 I started writing software and since around 2016/17 I live in Emacs and Org-Mode.
  Currently I study computer science at the University of Ulm.

  Besides these pages you can also find me at a few other places across the web.

* About me
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  <div style="text-align: center; margin: 20px 0;">
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    <div style="font-size: 40px">
	<strong>Hi!</strong>
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    <div style="font-size: 25px">
	My name is Marcel Kapfer and I do creative things.
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** Coding

   I learned Java as my first programming language back in 2014 and started a first project, the [[https://gitlab.com/mmk2410/writtenmorse-specs/-/wikis/home][writtenMorse]] project.
   It provided tools to convert writtenMorse code to Latin letters and the other way around. (Btw.: The writtenMorse code itself is an “invention” of mine for better writing Morse code by using other symbols than dots and dashes).
   Later in 2014 I started to learn coding for Android, since I wanted to develop a writtenMorse app for the mobile OS.
   This app was published on the Google Play Store in mid December, just three weeks after my first contact with Android development.
   Additionally to that I learned a bit of JavaScript in 2014 for enhanced features on my websites.

   In 2015 I expanded my knowledge by learning Bash, PHP, Python and a little bit of C.
   I also released a few font apps for the Cyanogenmod Theme Engine and some bash scripts to make my (and maybe also your) life easier.
   Rangitaki is another project that I started in February 2015.
   It was a blogging engine without any database dependencies, written in PHP, which tries to be lightweight and extremely fast to start with and easy to use.

   Following this passion I joined the Ulm University in October 2015 to studying computer science to further improve my knowledge in this area.
   In April 2021 I earned a Bachelor of Science degree in the field of theoretical computer science.

   I started learning more and more things about free (as in freedom, not as in free beer) software in the following years.
   I strongly support the idea of freedom in software and try to avoid non-free software were possible.
   One part of that is my decision to move all my project from GitHub to [[https://gitlab.com/u/mmk2410/projects][GitLab]] and [[https://git.mmk2410.org/explore/repos][my own Gitea instance]].

   Due to other activities in the recent years (and also the coming ones) I don't have much time (and currently also not much interested) in developing software.
   I try to further maintain some relevant projects, but most of them have been archived.

** Graphic Design

   I am a huge fan of eye pleasing works!
   Therefore I started designing a few years ago, but I hadn't jet time to do any major public work.
   As of now my experience narrows down to web design and a little bit of print design, but I currently expand my knowledge by taking online graphic design courses.

** Composing

   During my school time I had a lot to do with music and learned to play the piano.
   Later I started to focus more on finding my own style, which is is combination of Minimal Music and Impressionism and I also wrote down some scores.
   A first piece is written and more or less professionally set and also recorded.
   You can download and view both on the [[https://marcel-kapfer.de][composing page]].

   Due a lack of time in the last years I didn't have time to compose anything new.
   But one other piece is done and only waiting for its recording. Stay tuned!

** Writing

   To write about coding, politics, happenings in my life and also philosophy questions is something I'm interested in for years.
   Sadly due to many  other tasks I wasn't able to write much things.
   Next to the blog entries I have also published a few longer [[/manuscripts][manuscripts]].

** Real Life

   Away from my desk I loosely follow some hobbies.
   On one hand I like to read books of various kinds, including crime novels and science fiction / fantasy stuff but also some technical books.
   On the other hand I like visiting mother nature either for cycling, hiking or photographing.

** Others

   In case you are interested into what software and hardware I use, you can read my [[/uses][What I Use]] page.

* What I Use
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  Since I find the lists of other people about what the use quite interesting and from time to time someone asks my about what software/hardware I use I decided to also set up one.
  After having a simple blog post listing software since around 2016 I now put it all together here and update it from time to time.

  /Last updated: 20. August 2021/

** Hardware

*** General

    - *Display*
      - *Primary:* BENQ GW2765 (27", 16:9, 1440p)
      - *Secondary:* HP L1906 (19", 5:4, 1280x1024)
    - *USB-Audiointerface:* Focusrite Scarlett 2i2 (3rd Generation)
    - *Headphones:* Audio-Technica ATH-M50x
    - *Microphone:* Marantz Pro MPM-1000
    - *Keyboard:* Ducky One2 Mini
    - *Mouse:* Cherry MW2110 (wireless)

*** Laptop 1: Lenovo ThinkPad E490

    - *CPU:* Intel Core i5-8265 @ 1.6GHz
    - *GPU:* Intel UHD Graphics 620
    - *RAM:* 16GB
    - *Storage:* 500GB NVMe-SSD and 500GB SATA-SSD
    - *OS:* Microsoft Windows 10 Professional, Fedora Workstation 34, Debian 11 Bullseye
    - *Display*: 14" 1920x1080

*** Laptop 2: Lenovo Y50-70

    - *CPU:* Intel Core i7-4710HQ @ 2.5GHz
    - *GPU:* NVIDIA GeForce GTX 860M and Intel HD Graphics 4600
    - *RAM:* 12GB
    - *Storage:* 500GB SATA-SSD
    - *OS:* Microsoft Windows 10 Education
    - *Display*: 15", 3840x2160

*** Other hardware

    - *Home server:* BananaPi M2 Ultra with a 2TB HDD
    - *Smartphone:* Sony Xperia X (F5121)
    - *Tablet:* Samsung Galaxy Tab S4 (TM-830)
    - *Smart-/Sportswatch:* Garmin vívoactive 3
    - *Printer/Scanner*: Lexmark MC2425 (Duplex-Colour-Laser)
    - *E-piano:* Kawai CA-50

** Software

*** Desktop

    - *Browser:* Mostly [[https://www.mozilla.org/firefox/][Firefox]], sometimes Brave, with following extensions:
      - [[https://addons.mozilla.org/en-US/firefox/addon/privacy-badger17/][Privacy Badger]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/decentraleyes/][Decentraleyes]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/https-everywhere/][HTTPS Everywhere]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/want-my-rss/][Want My RSS]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/facebook-container/][Facebook Container]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/][Tree Style Tab]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/keepassxc-browser/][KeePassXC-Browser]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/link-cleaner/][Link Cleaner]]
      - [[https://addons.mozilla.org/en-US/firefox/addon/json-lite/][JSON Lite]]
    - *E-Mail client:* Sometimes [[https://www.thunderbird.net][Thunderbird]], sometimes [[https://www.djcbsoftware.nl/code/mu/mu4e.html][mu4e]]
    - *Planner:* [[https://orgmode.org/][org-mode]]
    - *Text editor:* [[https://www.gnu.org/software/emacs/][Emacs]], sometimes [[https://code.visualstudio.com/][Visual Studio Code]], notable extensions:
      - [[https://magit.vc/][Magit]] (the Git client)
      - [[https://orgmode.org/][org-mode]] (notes, todo-lists, planning, ...)
      - [[https://www.djcbsoftware.nl/code/mu/mu4e.html][mu4e]] (Mail client)
      - [[https://www.orgroam.com/][org-roam]] (personal knowledge management)
      - [[https://emacs-lsp.github.io/lsp-mode/][lsp-mode]] (Language Server Protocol integration)
      - [[https://www.gnu.org/software/erc/][ERC]] (Emacs IRC cient)
      - [[https://www.gnu.org/software/auctex/][AucTeX]] (LaTeX editing environment)
      - [[https://github.com/emacs-evil/evil][evil]] (vi keybindings)
      - [[https://oremacs.com/swiper/][Ivy, counsel, swiper]] and [[https://company-mode.github.io/][company-mode]] (completion system)
      - [[https://editorconfig.org/][editorconfig]] (defined and shared code styles)
      - [[https://github.com/akermu/emacs-libvterm][vterm]] (Emacs libvterm integration)
    - *Photo management:* Adobe Lightroom Classic (about to switch to something else soon)
    - *Photo editing:* [[https://affinity.serif.com/en-gb/photo/][Affinity Photo]], Adobe Photoshop, [[https://www.gimp.org/][GIMP]]
    - *Vector graphics:* [[https://affinity.serif.com/en-gb/designer/][Affinity Designer]], Adobe Illustrator, [[https://inkscape.org/][Inkscape]]
    - *Desktop publishing*: [[https://affinity.serif.com/en-gb/publisher/][Affinity Publisher]] and [[https://www.latex-project.org/][LaTeX]]
    - *Video editing:* Currently switching to DaVinci Resolve, [[https://kdenlive.org/en/][kdenlive]]
    - *Digital audio workstation (DAW):* Adobe Audition, Ableton Live Lite, Audacity (currently undecided)
    - *Scorewriter:* [[https://musescore.org/][musescore]]
    - *Music listening:* Spotify

*** Mobile

    - *Browser:* Brave and Firefox
    - *Messaging:* Conversation (XMPP), Discord, Linphone (softphone), [[https://github.com/MCMrARM/revolution-irc][Revolution IRC]], [[https://www.signal.org/][Signal]], Telegram, [[https://threema.ch/en][Threema]], WhatsApp
    - *Organization:* [[https://acalendar.tapirapps.de/en/support/home][aCalendar+]] (calendar and tasks), [[https://k9mail.app/][K-9 Mail]] (email)
    - *Music listening:* Spotify and [[http://y20k.org/transistor/][Transistor]] (radio)
    - *Social Networks:* [[https://tusky.app/][Tusky]] (Mastodon), [[https://klinkerapps.com/talon-overview/][Talon]] (Twitter), Instagram
    - *Privacy-tools:* [[https://jak-linux.org/projects/dns66/][DNS66]]
    - *Security:* [[https://github.com/andOTP/andOTP][andOTP]], [[https://github.com/PhilippC/keepass2android][Keepass2Android]]
    - *Software centres:* Google Play Store and [[https://f-droid.org/][F-Droid]]
    - *Others:* [[https://wiki.openstreetmap.org/wiki/StreetComplete][StreetComplete]]

** Self-hosted

   Everything except Searx (which runs on my home server) is hosted on a Hetzner VPS.
   Not really hosted but nevertheless still worth mentioning is [[https://syncthing.net/][Syncthing]].

   - *Wiki:* [[https://moinmo.in/][MoinMoin]]
   - *RSS:* [[https://freshrss.github.io/FreshRSS/en/][FreshRSS]] with [[https://github.com/RSS-Bridge/rss-bridge/wiki][RSS-bridge]]
   - *Cloud:* Nextcloud
   - *Git web interface:* [[https://gitea.io/][Gitea]]
   - *XMPP:* [[https://prosody.im/][Prosody]]
   - *Analytics:* Plausible
   - *IRC Bouncer:* [[https://wiki.znc.in/ZNC][ZNC]]
   - *Search engine:* [[https://searx.github.io/searx/][Searx]]

* Blog
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  From time to time I have something I want to write about. Seldom I
  also have the time to do so. In these rare occasions you will find a
  blog post at this place.

  If you're asking, about what I write: I really can't tell. The most
  things you can find here in the moment are about Linux, coding, and
  similar stuff. But I won't promise that this wont change. We'll
  see...

* Projects
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  Since I started to program in 2014 I started a few small software projects.
  Sadly over the last  years I had nearly no time to maintain any of them (except features and bugfixes I needed).
  However, I try to further maintain and develop them.
  You can find all of them at [[https://gitlab.com/mmk2410][GitLab]].

** Debian packages and Ubuntu PPAs

   My unofficial Debian packages and the corresponding Ubuntu PPA for Jetbrains IntelliJ IDEA are probably the most “famous” thing I have created.
   At least I get bug reports and merge requests when I do not update the packages fast enough.

   Besides them I also created a few other packages for Debian.

   To clarify: I am not a official Debian Developer or Maintainer and am also not formally trained on building Debian packages.
   Therefore the quality of the packages is certainly not that good.
   There are---more or less---quite hacky.

*** IntelliJ IDEA Community & Ultimate

    The community edition and the ultimate edition as well can be received from the Launchpad repository [[https://launchpad.net/~mmk2410/+archive/ubuntu/intellij-idea][ppa:mmk2410/intellij-idea]] which you can add on Ubuntu with

    #+begin_src shell
      sudo apt-add-repository ppa:mmk2410/intellij-idea # Add the repository
      sudo apt-get update # Update the package lists
      sudo apt-get install intellij-idea-community # Install IntelliJ IDEA Community
      sudo apt-get install intellij-idea-ultimate # and/or install IntelliJ IDEA Ultimate
    #+end_src

    The source code and the =.deb= packages are available at their repositories on GitLab:

    - [[https://gitlab.com/mmk2410/intellij-idea-community/][IntelliJ IDEA Community repository]]
    - [[https://gitlab.com/mmk2410/intellij-idea-ultimate/][Intellij IDEA Ultimate repository]]

*** Typefaces

    Because I needed them, I packaged three typefaces for Debian.
    The packages should also work for Ubuntu but I don't provide an PPA for them.

    I currently can not ensure active maintenance of any of these packages.

    - *Iosevka*: [[https:://gitlab.com/mmk2410/fonts-iosevka][GitLab]] [[https://git.mmk2410.org/deb/fonts-iosevka][Gitea]]
    - *Hermit*: [[https://gitlab.com/mmk2410/fonts-hermit][GitLab]] [[https://git.mmk2410.org/deb/fonts-iosevka][Gitea]]
    - *Overpass*: [[https://git.mmk2410.org/deb/fonts-overpass][Gitea]]

** Scorelib (inactive)

   Scorelib is a smaller project I started in 2015 for managing my collection music scores (the sheetpapers) with a database.
   Scorelib is a CLI program written in Python and using SQlite as a database.
   I assume that it only runs on Linux, but I never tested it on other platforms.
   Scorelib is, as of now, quite small with only the basic features implemented (like I wrote on the beginning, I had no time to code much the last years).
   It is available at [[https://gitlab.com/mmk2410/scorelib][GitLab]].

   Note: Although the title says that the project is inactive I do not consider archiving it.
   Theoretically I still have a need for such a software but practically time is missing to work on it.
   It is also possible that I will start working on it again but then possibly also with a completely different tech stack/goal.

** Other

   Smaller scripts that aren't worth their own Git repository can be
   found at the [[https://gitlab.com/mmk2410/scirpts][scripts repo]].

** Archived
*** CyanogenMod Fonts (archived)

    In early 2015 I created three font packages for the CyanogenMod
    Theme Chooser (Comfortaa, Fira Sans and Raleway) which were all
    quite a success at Google Play. But since end of 2015 I no longer
    own an device for which a CyanogenMode / LineageOS build is
    available and so I sadly cannot further develop or maintain those
    packages. I /you/ are interested in helping with these projects,
    feel free to contact me at me(at)mmk2410(dot)org!

*** Rangitaki (archived)

    The biggest project I've started is the Rangitaki blogging engine.
    A blogging engine (with a few CMS features) written in PHP and
    without database dependencies. I used it prior to this WordPress
    installation and still use it on [[https://marcel-kapfer.de][marcel-kapfer.de]].

    Read more about it at [[https://gitlab.com/mmk2410/rangitaki/wikis/home][GitLab]].

*** writtenMorse (archived)

    writtenMorse was the first project I've started back in 2014. Its
    goal is it to provide a Morse code system for writing and reading
    (with signs like =#= for a letter space and =+= for a word space)
    -- especially at computer system, as well as software to work with
    it. The project started with a simple Java program which grow fast
    to a full-features software for converting writtenMorse and also
    Morse code. The project also created an Android app an a
    responsive web app.

    More information can still be found at the corresponding [[https://gitlab.com/mmk2410/writtenmorse-specs/wikis/home][wiki
    page]].

*** Other archived projects

    Beneath those projects there were also a few other ones worth
    mentioning like [[https://gitlab.com/mmk2410/filespread][Filespread]], an web app for sending a file to a
    group of people via mail, and [[https://gitlab.com/mmk2410/titama][TiTaMa]], a simple time table manager
    web app written in PHP (a rewrite in Dart was started and the
    backend is complete since mid-2016 but the frontend was never
    started). There is also the usual bunch of dead experiments like
    an Rangitaki SSH Sync library, written in C with libssh. As of now
    all these are no longer developed and archived.

* Manuscripts
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  Here you can find some articles, concepts, manuscripts and similar
  documents. Most of them are written in German.

** Philosophy

   - [[/2019/04/handlungsfreiheit-privatautonomie-mensch-autonome-systeme.pdf][Handlungsfreiheit und Privatautonomie des Menschen bei autonomen Systemen]] (Deutsch, 12. Februar 2019)
   - [[/2018/07/arbeit.pdf][Suizid aus den Augen Viktor E. Frankls]] (Deutsch, 30. März 2018)
   - [[/2018/03/mathematik-antike.pdf][Mathematik in der Antike]] (Deutsch, 12. März 2018)

** Computer Science

   - [[/2018/08/overview-of-finding-the-most-probable-explanation-in-bayesian-networks.pdf][Overview of finding the most probable explanation in Bayesian networks]] (English, 09. July 2018)
   - [[/2018/03/vergleich-bdsg-dsgvo.pdf][Das Bundesdatenschutzgesetz im Vergleich mit der Datenschutz-Grundverordnung]] (Deutsch, 24. Januar 2018)

** Misc

   - [[/2018/03/konzept-gespraech-konfliktbewaeltigung.pdf][Konzept für Gespräche zur Konfliktbewältigung]] (Deutsch, 27. März 2018)

* Quotes
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  /These pages are only in German./

  Auf diesen Seiten sammeln sich zahlreiche (zumeist unkommentierte)
  Zitate. Der Großteil (zur Zeit sogar noch alle) stammen von einem
  Projekt 365 (wem das nicht bekannt ist, ein Projekt 365 ist ein
  Projekt, bei welchem man sich täglich eine Aufgabe vornimmt), zu
  welchem ich 2015 ermuntert wurde. Ich habe mich damals dazu
  entschieden, ein Jahr lange jeden Tag ein Zitat (unkommentiert) zu
  posten. Diese Sammlung findet sich hier.

  Das hießt aber nicht, dass nie etwas Neues hinzukommt. Es ist gut
  möglich, dass ich hier in Zukunft von Zeit zu Zeit ein Zitat poste
  und eventuell dieses auch sogar etwas kommentiere. Mal schauen... :D

  Falls das mal der Fall sein sollte und sich jemand bewusst nur für
  die Posts im Rahmen des damaligen Projekt 365 interessiert, kann er
  explizit diese unter der [[/categories/project365-2015][dazugehörigen Kategorieseite]] lesen.

* Contact
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  If you want to contact me you can choose among the following options (though I prefer email):

  - Email: me(at)mmk2410(dot)org (PGP key ID: =CADE 6F0C 09F2 1B09=)
  - XMPP/Jabber: mmk2410(at)xmpp(dot)mmk2410(dot)org
  - Direct Message on either Mastodon or Twitter (accounts see below)

  You can also follow me on some social networks where I am more or less active:

  - Mastodon/Fosstodon: [[https://fosstodon.org/@mmk2410][@mmk2410@fosstodon.org]]
  - Twitter: [[https://twitter.com/mmk2410][@mmk2410]]

* Impressum und Datenschutz
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  Marcel Kapfer<br>
  Buchenlandweg 99<br>
  89075 Ulm

  E-Mail: me(at)mmk2410(dot)org

  Verantwortlich für den Inhalt (gem. § 55 Abs. 2 RStV):<br>
  Marcel Kapfer<br>
  Buchenlandweg 99<br>
  89075 Ulm

** Disclaimer – rechtliche Hinweise
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*** § 2 Externe Links

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***  § 3 Urheber- und Leistungsschutzrechte

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  Quelle: Impressum-Generator.

**  Datenschutz

  Nachfolgend möchten wir Sie über unsere Datenschutzerklärung
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  Die Verwendung der Kontaktdaten unseres Impressums zur gewerblichen
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  erheben, verarbeiten und nutzen personenbezogene Daten soweit dies
  erforderlich ist, um Ihnen die Inanspruchnahme des Webangebots zu
  ermöglichen (Nutzungsdaten). Sämtliche personenbezogenen Daten
  werden nur solange gespeichert wie dies für den genannten Zweck
  (Bearbeitung Ihrer Anfrage oder Abwicklung eines Vertrags)
  erforderlich ist. Hierbei werden steuer- und handelsrechtliche
  Aufbewahrungsfristen berücksichtigt. Auf Anordnung der zuständigen
  Stellen dürfen wir im Einzelfall Auskunft über diese Daten
  (Bestandsdaten) erteilen, soweit dies für Zwecke der
  Strafverfolgung, zur Gefahrenabwehr, zur Erfüllung der gesetzlichen
  Aufgaben der Verfassungsschutzbehörden oder des Militärischen
  Abschirmdienstes oder zur Durchsetzung der Rechte am geistigen
  Eigentum erforderlich ist.

***  Auskunftsrecht

  Sie haben das jederzeitige Recht, sich unentgeltlich und
  unverzüglich über die zu Ihrer Person erhobenen Daten zu erkundigen.
  Sie haben das jederzeitige Recht, Ihre Zustimmung zur Verwendung
  Ihrer angegeben persönlichen Daten mit Wirkung für die Zukunft zu
  widerrufen. Zur Auskunftserteilung wenden Sie sich bitte an den
  Anbieter unter den Kontaktdaten im Impressum.

  Quelle: [[https://www.juraforum.de][www.juraforum.de]]
