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about
publications
short cv
scholarships
affiliations
visits
talks
links
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Tim is a published researcher with a broad knowledge in discrete optimization, operations research, artificial intelligence and related areas. He has joined Amazon Development Center Germany as a Machine Learning Scientist.
| 2013 |
Forecasting with In-Memory Technology, with Stephan Kolassa, Martin Lorenz, Christian Schwarz. Foresight. |
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| 2013 |
RTP: Robust Tenant Placement Robust Tenant Placement for Elastic In-Memory Database Clusters, with Jan Schaffner, Megan Kercher,
Tim Kraska, Hasso Plattner, Michael Franklin, Dean Jacobs. Proc. SIGMOD. |
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| 2013 |
Generating Realistic Tenant Traces for Enterprise DBaaS, with
Jan Schaffner, Proc. SMDB. |
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| 2012 |
Rapid Energy Consumption Pattern Detection with In-Memory Technology, with
Christian Schwarz, Felix Leupold, Tobias Schubotz, Hasso Plattner, International Journal On Advances in Intelligent Systems, v5, n3-4. |
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| 2012 |
Demand Forecasting with partial POS Data using In-Memory Technology, with
Martin Lorenz, Christian Schwarz, Enno Folkerts, Ralf Heimburger, Arzum Akkas, David Simchi-Levi, Nataly Youssef, Proc. of 32nd International Symposium on Forecasting, Boston. |
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| 2012 |
Symmetry Breaking with Polynomial Delay, with
Barbara M. Smith and
M.R.C. van Dongen, Constraint Programming Letters. |
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| 2011 |
Branch-Cut-And-Propagate For The Maximum k-Colorable Subgraph Problem with Symmetry, with
Marc E. Pfetsch, CPAIOR 2011. |
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| 2010 |
The Maximum k-Colorable Subgraph Problem and Orbitopes, with Marc E. Pfetsch, Discrete Optimization. |
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| 2010 |
Arities of Symmetry Breaking Constraints.
In: Proceedings of the Tenth International Workshop on Symmetries in Constraint Satisfaction Problems (SymCon 10). |
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| 2009 |
Foundations of Symmetry Breaking Revisited with
Barbara M. Smith and
M.R.C. van Dongen .
In:
Proceedings of the Ninth International Workshop on Symmetry in Constraint Satisfaction Problems (SymCon 09). |
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| 2007 |
Symmetry Breaking for the Maximal k-colourable Subgraph Problem,
Diploma thesis, TU Berlin, October 2007
(available per email). |
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| 09/2013 | machine learning scientist at Amazon Development Center Germany, Berlin
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| 09/2011-08/2013 | researcher and developer at SAP Innovation Center Potsdam
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| 2011 | post-doc at TU Braunschweig
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| 12/2007-12/2011 | phd student in computer science at UCC |
| 2007 | diploma in mathematics at TU Berlin |
| 2005 - 08 | student research assistant at ZIB |
| 2004 - 05 | exchange year at IMPA |
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| 2011 | COST Action STSM grant for visit to TU Braunschweig |
| 2008 - 10 | embark scholarship of the Irish Research Council for Science, Engineering and Technology |
| 2005 - 07 | scholarship of the Cusanuswerk |
| 2004 - 05 | scholarship of the DAAD |
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| 2011-2013 | EPIC, Hasso Plattner Institute (visiting researcher) |
| 2012 | Mathematical Optimization Group, TU Braunschweig |
| late 2007-2011 | Computer Science department, UCC |
| 2008-2011 | 4C |
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| September 2010 | SymCon'10 and CP 2010, St. Andrews, Scotland |
| June/July 2010 |
Zuse Institute Berlin, Germany and TU Braunschweig, Germany |
| September 2009 | SymCon'09 and CP 2009, Lisbon, Portugal |
| July 2009 | ACP Summer School in Cork, Ireland |
| May 2009 | Member of the organizing commitee of "Fair Democracy? Mathematics of social behaviour". The annual meeting
of mathematicians and computer scientists of the Cusanuswerk |
| January 2009 | School of Computing, University of Leeds, England |
| July 2008 | ACP Summer School in St. Andrews, Scotland |
| 2005 - 06 | IMPA, Rio de Janeiro, Brazil |
| April 2013 | "Leveraging SAP HANA for Complex Computations: Initial Experimental Results", with Enno Folker, Chirag Kothari, Carsten Schumm, Florian Schweinfurth. Poster at International Conference for Performance Engineering, Prague |
| October 2012 | "Demand forecasting using in-memory computing and SAP HANA", seminar talk at Coral Seminar, School of Business and Social Sciences, Aarhus University, Denmark |
| June/July 2010 | "Symmetries in CP and IP", seminar talk at Zuse Institute Berlin and TU Braunschweig |
| December 2009 | invited lecture in ST4401 Introduction to Operations Research |
| November 2009 | presentation as mid-term PhD evaluation |
| September 2009 | poster and talk at the Doctoral Program of CP 2009, Lisbon, Portugal |
| September 2009 | presentation at SymCon'09 |
| July 2009 | presentation at ACP Summer School in Cork, Ireland |
| March 2008 | presentation of PhD project at UCC |
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