Homepage of Karen Aardal

Name : Karen Aardal Email : K 'dot' I 'dot' Aardal 'at' tudelft 'dot' nl Office : 04.030 Address : Delft Institute of Applied Mathematics, Faculteit EWI, Technische Universiteit Delft Mekelweg 4 2628 CD Delft The Netherlands Phone : +31 15 27 85093/84109Here is a link to our Campus Map. We sit in building 36.

Before becoming full professor at TU Delft (2008) I held positions at several Dutch universities and at CWI, and at University of Essex, UK and Georgia Tech, USA.

I have been a chair of the Mathematical Optimization Society (MOS), and of the MOS Publications and Executive Committees. I have also served three terms as a member of the board of INFORMS Computing Society.

I serve or have served as area editor “Design and Analysis of Algorithms” of INFORMS J on Computing, associate editor of Mathematical Programming Series B, Networks, Operations Research Letters, and EURO Journal on Computational Optimization. I co-edited (with G.L. Nemhauser and R. Weismantel) the handbook on Discrete Optimization (Elsevier), and two volumes of Mathematical Programming, Series B. I was chairing the Program Committee of IPCO 2023 and has served on various program committees of IPCO and ESA.

I was a member of the Dutch Mathematics Council in the period 2016-2021, and am currently a member of the Institute Advisory Committee of CWI, Amsterdam, the board ENW of the the Dutch Organization for Scientific Research, NWO, and of the Scientific Committee of the Gesellschaft für Mathematische Forschung e.V. (MFO, Oberwolfach).

I became an INFORMS fellow in 2019.

- J. Byrka, K. Aardal. An optimal bifactor approximation algorithm
for the metric uncapacitated facility location problem.
*SIAM Journal on Computing*39, 2010, 2212--2241. - M. van Buuren, K. Aardal, R. van der Mei, H. Post.
Evaluating dynamic dispatch strategies for emergency medical services: TIFAR simulation tool
In: C. Laroque, J. Himmelspach, R. Pasupathy, O. Rose, A.M. Uhrmacher (eds.)
*Proceedings of the 2012 Winter Simulation Conference*. IEEE, pp 1--12. doi: 10.1109/WSC.2012.6465214, ISBN 978-1-4673-4779-2. - K. Aardal, F. von Heymann. On the Structure of Reduced Kernel Lattice
Bases. In: M. Goemans and J. Correa (eds.):
*Proceedings of IPCO 2013, Lecture Notes in Computer Science*, Vol. 7801, Springer-Verlag, Heidelberg, pp 1-12, 2013. - K. Aardal, F. von Heymann. On the structure of reduced kernel lattice bases.
*Mathematics of Operations Research***39**(3), 2014, 823-840. Permalink. Extended version of the previous paper. - K. Aardal, P. Le Bodic. Approximation algorithms for the Transportation
Problem with market choice and related models.
*Operations Research Letters***42**(8), 2014, 549-542. - P.L. van den Berg, K. Aardal. Time-dependent MEXCLP with startup and
relocation cost.
*European Journal of Operational Research*242(2), 2015, 383-389. - K. Aardal, P.L. van den Berg, D. Gijswijt, and S. Li. Approximation Algorithms
for Hard Capacitated k-facility Location Problems.
*European Journal of Operational Research***242**(2), 2015, 358-368. - R. Kerkkamp, K. Aardal. A constructive proof of swap local search worst-case instances
for the maximum coverage problem.
*Operations Research Letters***44**(3), 2016, 329-335. - J. Røislien, P.L. van den Berg, T. Lindner, E. Zakariassen, K. Aardal. Exploring
optimal air ambulance base locations in Norway using advanced mathematical modelling.
*Injury Prevention***23**(1), 2017, 10-15. - M. van Engelen, O. Cats, H. Post, K. Aardal. Demand-Anticipatory Flexible
Public Transport Service.
*Transportation Research E***110**, 2018, 110-121. https://doi.org/10.1016/j.tre.2017.12.015 . - J. Røislien, P.L. van den Berg, T. Lindner, E. Zakariassen. O. Uleberg, K. Aardal, J.T. van Essen. Comparing population and incident data for optimal air ambulance base locations in Norway.
*Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine***26**(42), 2018, 2-11. - K. Aardal, F.J. von Heymann, A. Lodi, A. Tramontani, L.A. Wolsey. Lattice reformulation cuts. Under review.

- IN4301 Advanced Algorithms, MSc Computer Science.
- WI4410 Advanced Discrete Optimization, MSc Applied Mathematics.
- BSc- and MSc-projects.

- 1998 - 2008: Associate editor of Operations Research Letters
- 1999 - 2006: Associate editor of INFORMS Journal on Computing
- 2000 -: Associate editor of Mathematical Programming B
- 2003-2013: Associate editor of Networks
- Guest editor, with Rekha
Thomas, of
*Mathematical Programming B,*Vol. 96, Number 2, 2003, on**Algebraic and Geometric Methods in Discrete Optimization** - Guest editor, with Laura Sanità, of
*Mathematical Programming B,*forthcoming, on**Special issue dedicated to papers from IPCO 2022** - Co-editor (with G. Nemhauser and R. Weismantel) of
*Discrete Optimization*, volume 12 in the series Handbooks in Operations Research and Management Science Elsevier, 2005. - 2000 -: Principal Coordinator of Optimization Online -- an eprint site for the optimization community
- 2006 - 2018: Area editor of
*Design and Analysis of Algorithms*, INFORMS Journal on Computing - 2013 -: Associate editor of RAIRO
- 2013 - 2020: Editor of EURO Journal on Computational Optimization

- Discrete Mathematics and Optimization seminars, TUD
- Optimization seminars, CWI
- Dutch Optimization Seminars
- Dutch network on the Mathematics of Operations Research, LNMB
- Optimization Online
- Arxiv, math
- The Mathematical Optimization Society, MOS
- American Mathematical Society, AMS
- The Association for Computing Machinery, ACM
- Society for Industrial and Applied Mathematics, SIAM
- Institute for Operations Research and the Management Sciences, INFORMS

Updated by Karen Aardal, May, 2023.