Historical Software

	PARTY.EXE, a dynamic simulation of a party with up to 15 guests. An early program (1989), compiled for x86-16 with Turbo Pascal 5.0. Runs under Microsoft Windows without any issues. Personally, I would not start any executable from an unknown source, but I assure that this particular program is harmless.
	plasma.jar, computes and animates a fractal. Written in Java ME CLDC-1.1/MIDP-2.0(2007), compiled for Nokia Series 40 3rd Edition mobile phones (e.g. Nokia 2865, 3109, 3110, 3500, 5200, 5300, 6085, 6086, 61xx, 62xx, 6300, 7370, 7373, 7390, 8600, 8800). This small application (11k) can also be downloaded over-the-air using WAP: r.schlenk.info/ref/wap/plasma/

Current Projects

Some of my ongoing projects are on Github. In particular those that require sharing with others.

Photography

Enjoy a collection of beautiful sceneries I have shot some time ago. Many more recent ones are on my Instagram.

Music

Playing around with my MIDI piano is fun - but listening to it could be a pain. Click on Weihnachten.mp3, a variation on the song »Ah, vous dirai-je Maman« (Morgen kommt der Weihnachtsmann) by Wolfgang Amadeus Mozart (KV 265), and decide yourself. :-)

Science Fiction

Science-fiction is a broad genre with high- but also a lot of... well... low-quality literature. In this list (German only) you will find some reading tips, covering the "better parts" of the sci-fi bookshelf.

Geocaching

I love being outdoors as well as solving mysteries. Geocaching brings together both worlds and is also a natural fit when hiking with children. Since I have started geocaching, I have found quite a number of caches - you can browse through some statistics on this page. I have also hidden some own caches and dropped off travelbugs. Sounds rather esoteric, eh? If you want to know more, just visit the Geocaching portal.

Freifunk

I support the wireless community network initiative Freifunk, thus demonstrating a potential alternative to network commercialization, surveillance, and extensive data collection. Over time I have deployed various Freifunk nodes all over the city - in private homes, shops, and refugee accommodations.

Useless Machine

I happen to work in the same company Marvin Minsky and Claude Shannon, both known for the creation of the "Useless Machine", worked for. Reason enough for me to build such a machine as well. See a video of it here.

Metal Working

How would you test the quality of your weld seams? Attach a nozzle and pump in some water! Test passed! The result needs to be viewed from different angles, so see a 3D scan of the object here.

Trekking

Looking back to numerous hiking and trekking tours, those that involved long distances were among the most interesting ones. On Streckenwanderungen auf Altstraßen (in German) I have collected some information on tours (with my young son) involving historic ways. For some nice mountain tours in the Alps see http://schlenk.info/huettentouren (private, password protected).

Open Collaboration

I am an active contributor to the collaborative Internet projects Wikipedia and OpenStreetMaps.

Tor

"Arguing that you don't care about the right to privacy because you have nothing to hide is no different than saying you don't care about free speech because you have nothing to say." (Edward Snowden) — Or more to the point, in the words of Julia Zeh: "'Ich habe nichts zu verbergen' ist ein Synonym für 'Ich tue, was man von mir verlangt'." And that is the reason why I am not only a user of Tor but also operate a Tor node, supporting whistleblowers, dissidents, the Horsemen of the Infocalypse, and even the CIA! :-)

Librivox

I love audiobooks (especially while commuting), and Librivox is a great project to make more content available. At least until natural computer-generated voices take over. Those who know my voice will recognize my contributions on librivox.org.

Die Pfifferlinge e.V.

Germany's next export success?! Since 2012 I was member of the management board (Vereinsvorstand) of the forest preschool (Waldkindergarten) "Die Pfifferlinge e.V." in Erlangen.

Publications

• M. Busch, R. Schlenk, H. Heckel: “TEEMo: Trusted peripheral monitoring for optical networks and beyond,” 4th Workshop on System Software for Trusted Execution (SysTEX 2019), Huntsville, ON, Canada, 2019. Best Paper Award winner. [private copy]
• C. Lange, R. Schlenk, M. Schlosser, F. Pfeuffer, I. Gamrath, A. Werner, D. Kosiankowski, A. Betker, D. Prantl, H. Lehmann: “Telecommunication Networks as Smart Energy Consumers in Space and Time,” Journal of Green Engineering, Volume 6, Number 2, 2016.
• C. Lange, N. Casott, D. Kosiankowski, M. Schlosser, R. Schlenk: “Concept for Telecom Network Production Sites Towards Sustainable and Energy-Efficient Operation,” Electronic Goes Green 2016+ Conference, Berlin, Germany, 2016.
• H. Woesner, C. Lange, R. Schlenk, M. Schlosser, D. Kosiankowski: “Virtualization in high-throughput network elements and its impact on energy consumption,” 17. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2016.
• M. Schlosser, A. Werner, R. Schlenk, T. Jungel, C. Lange: “Demonstrating Energy-Efficiency Improvements in Load-Adaptive Dynamic Multilayer Optical Networks,” 15. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2014.
• H. Lehmann, R. Schlenk, D. Prantl, M. Schlosser, T. Jungel: “Communication Network-Centric Smart Grid Services,” 21st International Conference on Software, Telecommunications and Computer Networks (SoftCOM), Split, Croatia, 2013. [public copy]
• R. Schlenk, C. Lange, H. Lehmann, R. Vleugel: “Taxonomy of Dynamic Power Saving Techniques in Fixed Broadband Networks,” Presentation Slides, 14. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2013.
• C. Lange, R. Schlenk, H. Lehmann: “Network Element Characteristics for Traffic Load Adaptive Network Operation,” 13. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2012.
• R. Schlenk: “100-Gbit/s-Ethernet-Verarbeitung: Neue Herausforderungen und ihre Lösungen,” ntz Fachzeitschrift für Informations- und Kommunikationstechnik 63 (2010), H. 7-8, S. 24-26, 2010.
• R. Schlenk, C. Hermsmeyer: “Scalable Architectures for 100 GbE Packet Processing,” 10. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2009. [private copy]
• C. Hermsmeyer, R. Schlenk: “Next generation networking with 100G/100GbE,” 10. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2009. [private copy]
• C. Hermsmeyer, H. Song, R. Schlenk, R. Gemelli, S. Bunse: “Towards 100G Packet Processing: Challenges and Technologies,” Bell Labs Technical Journal, Volume 14, Number 2, 2009. [private copy]
• R. Schlenk: “Flooding Traffic Reduction through Optimized Address Learning in Carrier-Grade Ethernet Networks,” 9. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2008. [private copy]
• R. Schlenk, D. Stahl, A. Zottmann, H. Haunstein: “Real time analysis of error statistics and FEC schemes for DPSK transmission at 43 Gb/s,” 6. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2005.
• D. Stoll, H. Dentler, G. Greif, P. Hessler, R. Schlenk: “ASTN enhanced Ethernet Transport Services,” 6. ITG Fachtagung Photonische Netze, Leipzig, Germany, 2005.
• H. F. Haunstein, A. Dittrich, W. Sauer-Greff, R. Schlenk, R. Urbansky: “Mitigation of Fiber Impairments by Electronic Maximum-Likelihood Polarization Diversity Receivers,” Paper We4.P, Proc. European Conference on Optical Communications (ECOC), Stockholm, Sweden, 2004.
• H. F. Haunstein, R. Schlenk, K. Sticht, A. Dittrich, W. Sauer-Greff, R. Urbansky: “Optimized Filtering for Electronic Equalizers in the Presence of Chromatic Dispersion and PMD,” Paper MF63, Proc. Optical Fiber Communications Conference (OFC), Anaheim, USA, 2004. [private copy]
• H. F. Haunstein, R. Schlenk, K. Sticht, A. Dittrich, W. Sauer-Greff, R. Urbansky: “Control of Combined Electrical Feed-Forward and Decision Feedback Equalization by Conditional Error Counts from FEC in the Presence of PMD,” Paper ThG5, Proc. Optical Fiber Communications Conference (OFC), Atlanta, USA, 2003. [private copy]
• H. Haunstein, R. Schlenk, H. M. Kallert, V. A. Pauli: “BER Measurements of a 40Gb/s Receiver with Adaptive Threshold using Polarization Scrambling,” Paper MB3.4, Proc. LEOS Summer Topical Meeting Series, Vancouver, Canada, 2003. [private copy]
• H. F. Haunstein, K. Sticht, R. Schlenk, M.Lorang, A. Dittrich, W. Sauer-Greff, R. Urbansky: “Control of 3-tap electrical Feed-Forward Equalizer by Conditional Error Counts from FEC in the presence of PMD,” Paper WQ7, Proc. Optical Fiber Communications Conference (OFC), Anaheim, USA, 2002. [private copy]