Weblog Articles

2020

• Started working for eBay Inc in San José, CA, USA.2020-11-02
• Thrill YouTube Tutorial: High-Performance Algorithmic Distributed Computing with C++2020-06-01
• IPDPS Paper "Communication-Efficient String Sorting" and Talk Recording2020-05-18
• List of Recordings of Lectures and Exercises on YouTube2020-01-28

2019

• Lines of Code Plotted over Time of Some Large and Some Small Projects2019-11-22
• Presentation "COBS: A Compact Bit-Sliced Signature Index" at SPIRE 2019 (Best Paper Award)2019-10-08
• BlinkenSort with Sound - The Sound of LED Sorting Algorithms with Raspberry Pi 3 and APA102 or SK9822 LEDs2019-08-02
• BlinkenSort - Sorting Algorithms on LEDs with ESP8266 and SK6812 or WS2812B2019-08-01
• Uniserv Research-Prize "Algorithms for Efficient Data-Processing" for my Dissertation2019-06-19
• YouTube Video: "Animation of the US Treasury Yield Curve with Inversions from 1962-01-01 to 2019-04-01"2019-04-03
• NVMe "Disk" Bandwidth and Latency for Batched Block Requests2019-03-22

2018

• Presentation "Scalable Construction of Text Indexes with Thrill" at IEEE Big Data 20182018-12-12
• Print Quality of Print-On-Demand Books from Amazon Createspace/KDP, epubli.de, and Ingram Spark2018-11-05
• Tutorial on Boost.Spirit at C++ User Group Karlsruhe2018-09-12
• Dissertation "Scalable String and Suffix Sorting: Algorithms, Techniques, and Tools"2018-07-03
• Note about the new tlx library of Advanced C++ Data Structures and Algorithms2018-05-28

2017

• Presentation "C++ Goodies" at C++ User Group Karlsruhe2017-03-08

2016

• Presentation "Thrill: High-Performance Algorithmic Distributed Batch Data Processing with C++" at IEEE Big Data 20162016-12-06
• Presentation "STXXL and Thrill (Parallel Batch Processing)" at STXXL Workshop in DFG SPP 17362016-09-21
• Thrill: High-Performance Algorithmic Distributed Batch Data Processing with C++2016-08-20
• "On the Structure of the Graph of Unique Symmetric Base Exchanges of Bispanning Graphs" - Diploma Thesis in Mathematics2016-01-14

2015

• Presentation "Massive Suffix Array Construction with Thrill" at DFG SPP 1736 Annual Colloquium2015-10-01
• Publication: Engineering Parallel String Sorting in Algorithmica Journal2015-09-22
• emacs Tutorial: Beating the Learning Curve - From Zero to Lightspeed2015-08-19
• Presentation of Parallel Priority Queue at the Conference SEA'20152015-06-30
• A Bulk-Parallel Priority Queue in External Memory with STXXL2015-04-03
• Presentation of DALKIT (work in progress) in Berlin2015-03-27

2014

• Released STXXL 1.4.12014-10-29
• 1.000.000 Views of Sound of Sorting YouTube Video2014-10-26
• Practical Massively Parallel Sorting -- Basic Algorithmic Ideas2014-10-24
• Recording Frame-Perfect, High-Resolution Screencasts on Linux in the Year 20142014-06-30
• Recording of a Talk "STXXL 1.4.0 and Beyond"2014-06-22
• Released parallel-string-sorting 0.6 <br/> including Parallel Super Scalar String Sample Sort and Parallel Multiway LCP-Mergesort2014-03-09

2013

• Released STXXL 1.4.02013-12-12
• Sound of Sorting: Viral Video on KIT Informatik Webpage2013-10-24
• Presented Short Paper about eSAIS at MASSIVE'13 Workshop2013-09-05
• Small TikZ Drawing of a Pythagoras Tree2013-06-27
• Published "The Sound of Sorting" 0.62013-05-22
• Released parallel-string-sorting 0.5 including Parallel Super Scalar String Sample Sort2013-05-08
• Publishing STX B+ Tree 0.9 - Speed Gains over 0.8.62013-05-07
• STX B+ Tree Speed Test Measurements on Raspberry Pi (Model B)2013-05-06
• STX B+ Tree Measuring Memory Usage with malloc_count2013-05-05
• STX B+ Tree Revisiting Binary Search2013-05-04
• Released disk-filltest 0.7 - Simple Tool to Detect Bad Disks by Filling with Random Data2013-03-27
• Released malloc_count 0.7 - Tools for Runtime Memory Usage Analysis and Profiling2013-03-16
• Coding Tricks 101: How to Save the Assembler Code Generated by GCC2013-01-24

2012

• eSAIS - Inducing Suffix and LCP Arrays in External Memory2012-11-19
• Finding Roots of Polynomials by Clipping - Report and Implementation from my Lab Course in Numerical Mathematics2012-03-20

2011

• Vervollständigung meiner Seminararbeit in Diskreter Mathematik2011-08-31
• Update Release of STX B+ Tree 0.8.62011-05-18
• Yet Another Release of digup 0.6.40 - A Digest Updating Tool2011-01-31

2010

• Bugfix Release: digup 0.6.30 - A Digest Updating Tool2010-10-03
• Bugfix Release: digup 0.6.27 - A Digest Updating Tool2010-08-20
• Bugfix Release: stx-execpipe 0.7.1 - STX Execution Pipe C++ Library2010-07-30
• Published stx-execpipe 0.7.0 - STX Execution Pipe C++ Library2010-07-18
• Published stx-cbtreedb 0.7.0 - STX Constant B-Tree Database Template Classes2010-04-14
• New LibriVox Recording: "Double Take" by Richard Wilson2010-02-01

2009

• Published digup 0.6.23 - A Digest Updating Tool2009-11-10
• My First LibriVox Recording: "The Last Evolution" by John W. Campbell, Jr.2009-09-05
• Published Flex Bison C++ Example 0.1.42009-09-05
• Experiences Producing a Screencast on Linux for CryptoTE2009-08-17
• Published CryptoTE 0.5.3902009-08-08
• Completion Talk on My Diploma Thesis / Abschlussvortrag zu meiner Diplomarbeit2009-06-26
• Finished My Diploma Thesis on 802.11 in ns-32009-04-29
• Halftime Talk on My Diploma Thesis / Zwischenvortrag zu meiner Diplomarbeit2009-02-06

2008

• Published Flex Bison C++ Example 0.1.32008-10-23
• Update Release of STX B+ Tree 0.8.32008-09-07
• C++ Code Snippet - Print Stack Backtrace Programmatically with Demangled Function Names2008-09-01
• Update Release of STX B+ Tree 0.8.22008-08-13
• Published Flex Bison C++ Example 0.1.22008-08-03
• Speedtest and Comparsion of Open-Source Cryptography Libraries and Compiler Flags2008-07-14
• Kooperative LaTeX-Mitschrift zu Algebra 2 bei Prof. Herrlich2008-05-10
• Bugfix Release of STX B+ Tree 0.8.12008-01-25

2007

• Cry of Dolour by Stanislav Ossovsky - Free Fantastic Classic-Metal Music2007-10-14
• Really Good Lego Model of Escher's "Relativity"2007-09-07
• Published Flex Bison C++ Example 0.12007-08-20
• Published STX Expression Parser Framework Version 0.72007-07-17
• Spaß-Webpage - Bundestrojaner.net2007-06-06
• C++ Code Snippet - In-Place and String-Copy Uppercase/Lowercase Conversion of STL Strings2007-06-02
• C++ Code Snippet - In-Place and String-Copy Space Trimming of STL Strings2007-05-30
• Updated STX B+ Tree to 0.8 which now includes wxBTreeDemo2007-05-13
• lcov: A Good HTML Generator for gcov Results2007-05-08
• Published STX B+ Tree C++ Template Classes Version 0.72007-04-27
• Lautsprecher-Odyssee und Duetta Selbstbau2007-04-18
• HMTG Web Page Redesign2007-04-14
• C++ Code Snippet - Compressing STL Strings with zlib2007-03-28
• C++ Code Snippet - Using the Boost.Regex Library2007-03-14
• C++ Code Snippet - Making a Custom Class ostream Outputable2007-03-01
• NetFundamentals Seminar - Presentation Today2007-01-29

2006

• NetFundamentals Seminar - Technical Report Finished2006-12-19
• QtSqlView 0.8.0 Released2006-10-10
• SDIOS06 - Source Code and Ready-To-Run Image2006-09-14
• sdlfractal 0.12006-08-09
• Talk about Study Thesis - Slides and Movie2006-08-02
• SVG Logo der Universität Karlsruhe2006-08-01
• Presented Practical Work for SDI (System Design and Implementation)2006-07-27
• Nostalgic HTML Conversion of the HelpPC Shareware Reference2006-07-10
• Studienarbeit "Visualisierung sehr großer Graphen" fertiggestellt2006-06-20
• Talk in SDI Lab: Naming Service Design in a Multi-Server Operating System2006-06-01

2005

• Homepage zu meinem Tutorium zu Info3 im WS20052005-11-16
• LaTeX-Mitschrift zu Algebra 1 bei Prof. Herrlich2005-11-03
• Info2 SS2005 Probeklausur der Tutoren2005-07-11
• Vortrag "Objekt-orientiertes Programmieren in C"2005-06-14