Bas Ketsman

Postdoc at EPFL · Computer Science - Databases

Short Bio

I am a postdoctoral researcher at EPFL in Switzerland, where I work with Christoph Koch. Before moving to Lausanne I was a member of the DBTI group of Hasselt University in Belgium and PhD Fellow of the Research Foundation - Flanders (FWO). I obtained my PhD in December 2017 under the advice of Frank Neven.

My research interests lie in the area of cloud computing and big data computations. Past research focused mostly on the principles of database management, with as a red line the study and development of formal approaches to querying big data in parallel and distributed systems. This research has been awarded with best paper awards at the ACM PODS conference (year 2014 and 2015) and the EATCS distinguished dissertation award 2018. Ultimately, my goal is to use theory as a tool to better understand and improve systems for large-scale data management.

In 2016 I resided three months at the database group of the University of Washington, Seattle, where I worked with Dan Suciu. During this stay we developed a parallel join algorithm that runs with worst-case optimal communication cost. In 2017 I visited the database group of the University of Wisconsin-Madison for three months to collaborate with Paris Koutris. I also did short visits to Lehrstuhl Informatik 1 at the Technical University of Dortmund, Germany, to work with Thomas Schwentick.

Contact Information

EPFL IC IINFCOM DATA BC 212 (Bâtiment BC) Station 14 CH-1015 Lausanne Tel: +41216932734 E-mail: bas (dot) ketsman (at) epfl.ch

Publications

2018

2017

2016

2015

2014

2013

Teaching & Services

TA for courses at Hasselt University

  • 2167 - Compilers (Fall 2017 - Fall 2013)
  • 2269 - Constraint Satisfaction Problems (Fall 2016, Fall 2014)
  • 2182 - Foundations of Database Systems (Spring 2015)
  • 0664 - Logic and Functional Programming (Fall 2017 - Fall 2016)
  • 0656 - Algorithms and Datastructures (Fall 2015)

Services

  • Subreviewer - ACM PODS 2017
  • Reviewer - VLDBJ 2018, ACM TODS 2016, 2015, Elsevier IS 2015

Talks

  • Coordination-free query evaluation and multi-query optimization in parallel and distributed systems Stanford University, USA, 18 October 2017.
  • Coordination-free query evaluation and multi-query optimization in parallel and distributed systems University of California - Berkeley, USA, 14 August 2017.
  • A Worst-Case Optimal Multi-Round Algorithm for Parallel Computation of Conjunctive Queries PODS 2017, Chicago, USA, 17 May 2017.
  • A Worst-Case Optimal Multi-Round Algorithm for Parallel Computation of Conjunctive Queries University of Wisconsin - Madison, USA, 10 April 2017.
  • A Worst-Case Optimal Multi-Round Algorithm for Parallel Computation of Conjunctive Queries on Graphs, DBDBD 2016, Mons, Belgium, 28 October 2016.
  • Single-Round Multi-Join Evaluation University of Washington, Seattle, USA, 8 April 2016.
  • Parallel-Correctness and Transferability for Conjunctive Queries PODS 2015, Melbourne, VIC, Australia, 1 June 2015.
  • Optimal Broadcasting Strategies for Conjunctive Queries over Distributed Data ICDT 2015, Brussels, Belgium, 25 March 2015.
  • How to Stay CALM While Seeing What is not There? DBDBD 2014, Antwerp, Belgium, 17 October 2014.
  • Weaker Forms of Monotonicity for Declarative Networking: a more fine-grained answer to the CALM-conjecture PODS 2014, Snowbird, Utah, USA, 22 June 2014.