"A new economic model is needed--one that focuses on human welfare as being separate from income, and one that focuses on the resiliency of society rather than the growth of society over the long term",  David Murphy

Summary

ecturer at the University of Edinburgh Business School and Assistant Professor (Universitair Docent, UD) at Wageningen UR. My research is focused on automated reasoning. I develop systems that aim to be robust and scalable in such a way as to enable computers to act intelligently in increasingly complex real world settings and in uncertain environments.

Management Science and Business Economics

Assistant Professor

Logistics, Decision and Information Sciences

         

Activities

Current

Past

Software

NRG Forecasting Tool: coming soon!

SupplyRisk: a hybrid discrete-event/continuous simulation tool for microbiological risk assessment in food supply chains. This software is based on the SSJ library.

SupplyWeb: an optimization tool for (R,S) policy under non-stationary demand (Award nominated).

ANts (sourceforge, web page): a P2P autonomic network based on swarm intelligence. Over 500,000 downloads. Covered by online news.

Sharp Privacy Library: C# .NET API realizing a complete implementation of the OpenPGP standard (RFC 2440).

YALC: a complete DLX microprocessor system emulator with high level language compiler and IDE.

Awards

Optimization tool for (R,S) policy under non-stationary demand selected as one of the four Most Commercially Viable Softwares at ISA Student Medal Award 2006. Read article.

Grants

I have contributed to the acquisition of the following grants: Logistic chain modelling and packaging modelling as input for microbiological risk assessment (2010) funded by EU FP-7 Principal Investigator: Prof. J. van der Vorst (WUR)  webpage Stochastic Constraint Programming for Managing Risk (2009) one PhD studentship joinly funded by IBM and IRCSET Principal Investigator: Dr. Steven D. Prestwich (UCC) vacancy open  webpage

Education

Available MSc/BSc projects

Feel free to contact me if you are interested in working on one of the following topics:

(co)-Supervised Students

PhD (what is a PhD?)

MSc/BSc

Courses

Research

Optimization Under Uncertainty

• Stochastic Programming
• Stochastic Constraint Programming
• Sample Average Approximation
• Sample-based Filtering
• Stratified Sampling Techniques

Supply Chain Management

• Inventory Control
• Replenishment Cycle Policy
  
• Non-stationary stochastic demand
• Non-stationary stochastic supplier lead-time
• Supplier capacity constraints
• Perishable Items
• Quality Controlled Logistics
  
• Integration of Supply Chain Management and Business Process Management

Constraint Programming

• Hybrid methods in CP/AI/OR
• Constraint-Based Local Search

Program Committees

22nd International Joint Conference on Artificial Intelligence (IJCAI 2011), July 16-22, 2011, Barcelona, Spain

Groups and Associations

Current memberships:
Association for Constraint Programming (ACP)
Association of European Operational Research Societies (EURO)
Dutch Network on the Mathematics of Operations Research (LNMB)
Wageningen Graduate School of Social Sciences (WASS)
CUPS multisite research group (with S. A Tarim, B. Hnich and S. Prestwich)

Past memberships:
Artificial Intelligence Association of Ireland (AIAI)

Collaborators

Industrial Partners

I have collaborated or I am currently collaborating with

Presentations

Publications

	S. Prestwich, B. Hnich, H. Simonis, R. Rossi, S. A. Tarim, "Partial Symmetry Breaking by Local Search in the Group", Constraints, Springer-Verlag, provisionally accepted for publication ISI impact factor(2010): 1.41
	B. Hnich, R. Rossi, S. A. Tarim and S. Prestwich, "Filtering Algorithms for Global Chance-Constraints", Artificial Intelligence, Elsevier, provisionally accepted for publication ISI impact factor(2010): 2.511
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "Constraint Programming for Stochastic Inventory Systems under Shortage Cost",  Annals of Operations Research, Springer-Verlag, forthcoming ISI impact factor(2010): 0.675
	R. Rossi, S. A. Tarim, R. Bollapragada, "Constraint-based Local Search for Computing Non-Stationary Replenishment Cycle Policy under Stochastic Lead-times", INFORMS Journal on Computing, forthcoming ISI impact factor(2010): 1.172 A java code for simulating the policies obtained with the method discussed.  This code is based on the SSJ library.
	S. D. Prestwich, S. A. Tarim, R. Rossi, and B. Hnich, "A Neuroevolutionary Approach to Stochastic Inventory Control in Multi-Echelon Systems", International Journal of Production Research, Taylor & Francis, forthcoming ISI impact factor(2010): 1.033
	S. A. Tarim, U. Ozen, M. K. Dogru, R. Rossi, "An Efficient Hybrid Approach for Computing (Rn,Sn) Policy Parameters", European Journal of Operations Reseach, Elsevier, Vol. 215(3):563-571, 2011 ISI impact factor(2010): 2.158
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "A State Space Augmentation Algorithm for the Replenishment Cycle Inventory Policy", International Journal of Production Economics, Elsevier, Vol. 133(1):377-384, 2011 ISI impact factor(2010): 1.988
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "Computing Replenishment Cycle Policy under Non-stationary Stochastic Lead Time", International Journal of Production Economics, Elsevier, Vol. 127(1):180-189, 2010 ISI impact factor(2010): 1.988  A java code for simulating the policies obtained with the method discussed. This code is based on the SSJ library.
	R. Rossi, S. A. Tarim, B. Hnich, S. Prestwich and S. Karacaer, "Scheduling Internal Audit Activities: A Stochastic Combinatorial Optimization Problem", Special issue for The International Symposium on Combinatorial Optimization (CO-2008) March 16-19, 2008, Coventry, UK, Journal of Combinatorial Optimization, Springer-Verlag, Vol. 19(3):325-346, 2010 ISI impact factor(2010): 0.843
	S. A. Tarim, B. Hnich, S. Prestwich and R. Rossi, "Finding Reliable Solutions: Event-Driven Probabilistic Constraint Programming", Special issue for The Third International Conference on Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems (CP-AI-OR-06) May 30-June 2, 2006, Cork, Ireland, Annals of Operations Research, Springer-Verlag, Vol. 171(1):77-99, 2009 ISI impact factor(2009): 0.961
	R. Rossi, S. A. Tarim, B. Hnich, S. Prestwich and C. Guren, "A Note on Liu-Iwamura's Dependent-Chance Programming", European Journal of Operations Reseach, Elsevier, Vol. 198(3):983-986, 2009 ISI impact factor(2009): 2.093
	S. A. Tarim, B. Hnich, R. Rossi and S. Prestwich, "Cost-based Filtering Techniques for Stochastic Inventory Control under Service Level Constraints", Constraints, Springer-Verlag, Vol. 14(2):137-176, 2009 ISI impact factor(2009): 1.297
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "A Global Chance-Constraint for Stochastic Inventory Systems under Service Level Constraints", Constraints, Springer-Verlag, Vol. 13(4):490-517, 2008 ISI impact factor(2008): 0.879

B. Hnich, R. Rossi, S. A. Tarim and S. Prestwich, "A Survey on CP-AI-OR Hybrids for Decision Making under Uncertainty", In M. Milano and P. Van Hentenryck (Eds.), Hybrid Optimization: the 10 years of CP-AI-OR, Springer Optimization and Its Applications, Volume 45, pp. 227-270, 2011

	W. Rijpkema, R. Rossi and J. Van der Vorst, "Effective use of product quality information in meat processing", in Proceedings of the International Conference on Advances in Production Management Systems, APMS 2011, 26-28th September 2011, Stavanger, Norway
	R. Rossi, B. Hnich, S. A. Tarim and S. Prestwich, "Finding (α,ϑ)-solutions via Sampled SCSP", in Proceedings of the 22nd International Joint Conference on Artificial Intelligence, IJCAI 2011, Barcelona, Spain, July 16-22, AAAI Press, pp. 2172-2177, 2011
	W. A. Rijpkema, J.G.A.J. van der Vorst, R. Rossi, "Using postponement strategies to reduce planning uncertainty in meat supply chains", in Proceedings of the 15th Annual Conference of the Logistics Research Network (LRN Annual Conference 2010), University of Leeds, Institute for Transport Studies, September 8-10, 2010
	R. Rossi, S. A. Tarim, B. Hnich, S. Prestwich, "Computing Replenishment Cycle Policy Parameters for a Perishable Item", in Proceedings of the 24th MEC-EurOPT-2010, June 23-26, 2010, Izmir, Turkey, pp. 241-247, 2010
	S. Prestwich, S. A. Tarim, R. Rossi, B. Hnich, "Stochastic Constraint Programming by Neuroevolution With Filtering", in Proceedings of the 7th International Conference on Integration of Artificial Intelligence and Operations Research techniques in Constraint Programming (CP-AI-OR 2010), Bologna, Italy, June 14-18, 2010, Lecture Notes in Computer Science, Springer-Verlag, LNCS 6140, pp.282-286, 2010
	W. Rijpkema, R. Rossi, J. Van der Vorst, "The use of pig quality estimates in slaughterhouse supply planning", in Proceedings of the 9th Wageningen International Conference on Chain and Network Management (WICaNeM 2010), 26 May - 28 May 2010, Wageningen, The Netherlands
	W. Baltussen, R. Rossi, B. Doorneweert, H. Vrolijk, D. Oudendag, A. de Smet, "Livestock transportation: a model for ex-ante policy analysis", in Proceedings of the 9th Wageningen International Conference on Chain and Network Management (WICaNeM 2010), 26 May - 28 May 2010, Wageningen, The Netherlands best paper candidate
	S. Prestwich, S. A. Tarim, R. Rossi, B. Hnich, "Neuroevolutionary Inventory Control in Multi-Echelon Systems", In Proceedings of the 1st International Conference on Algorithmic Decision Theory (ADT-09), October 21-23, 2009, Venice, Italy, Lecture Notes in Computer Science, Springer-Verlag, LNCS 5783, pp.402-413, 2009
	B. Hnich, R. Rossi, S. A. Tarim and S. Prestwich, "Synthesizing Filtering Algorithms for Global Chance-Constraints", In Proceedings of the 15th International Conference on Principles and Practice of Constraint Programming (CP-09), September 21-24, 2009, Lisbon, Portugal, Lecture Notes in Computer Science, Springer-Verlag, LNCS 5732, pp.439-453, 2009
	S. Prestwich, S. A. Tarim, R. Rossi, B. Hnich, "Evolving Parameterised Policies for Stochastic Constraint Programming", In Proceedings of the 15th International Conference on Principles and Practice of Constraint Programming (CP-09) September 21-24, 2009, Lisbon, Portugal, Lecture Notes in Computer Science, Springer-Verlag, LNCS 5732, pp.684-691, 2009
	S. Prestwich, S. A. Tarim, R. Rossi and B. Hnich, "A Steady-State Genetic Algorithm With Resampling for Noisy Inventory Control", In proceedings of The 10th International Conference on Parallel Problem Solving from Nature (PPSN-2008), September 13-17, 2008, Technische Universität Dortmund, Germany, Lecture Notes in Computer Science, Springer-Verlag, LNCS 5199, pp.559-568, 2008
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "Cost-based Domain Filtering for Stochastic Constraint Programming", In proceedings of The 14th International Conference on Principle and Practice of Constraint Programming (CP-2008), Sep. 14-18, 2008, Sydney, Australia, Lecture Notes in Computer Science, Springer-Verlag, LNCS 5202, pp.235-250, 2008
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "Replenishment Planning for Stochastic Inventory Systems with Shortage Cost", In proceedings of The Fourth International Conference on Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems (CP-AI-OR 07) May 23-26, 2007, Brussels, Belgium, Lecture Notes in Computer Science, Springer-Verlag, LNCS 4510, pp.229-243, 2007

	R. Rossi, S. A. Tarim, B. Hnich, S. D. Prestwich, E. M. T. Hendrix, "On a CP approach to solve a MINLP inventory model", in Proceedings of the Toulouse Global Optimization workshop (TOGO 2010), ENSEEIHT and Ecole Polytechnique, 31st August - 3rd September, pp. 137-140, 2010
	S. D. Prestwich, B. Hnich, H. Simonis, R. Rossi, and S. A. Tarim. "Boosting Partial Symmetry Breaking by Local Search", In Proceedings of the 9th International Workshop on Symmetry and Constraint Satisfaction Problems (SYMCON 2009), in conjunction with CP 2009
	R. Rossi, S. Prestwich, S. Armagan Tarim and B. Hnich. "Generalizing Backdoors", In Proceedings of the 5th International Workshop on Local Search Techniques in Constraint Satisfaction (LSCS 2008) Sep. 14, 2008, Sydney, Australia, in conjunction with CP 2008
	S. Prestwich, S. A. Tarim, R. Rossi and B. Hnich, "A Cultural Algorithm for POMDPs from Stochastic Inventory Control", In Proceedings of the Internation Workshop on Hybrid Metaheuristics (HM 2008), 8-9 October 2008, Malaga, Spain, Lecture Notes in Computer Science, Springer-Verlag, LNCS 5296, pp.16-28, 2008
	S. Prestwich, B. Hnich, R. Rossi and S. Armagan Tarim. "Symmetry Breaking by Metaheuristic Search", In Proceedings of the 8th International Workshop on Symmetry and Constraint Satisfaction Problems (SYMCON 2008) Sep. 14, 2008, Sydney, Australia, in conjunction with CP 2008
	S. A. Tarim, B. Hnich, R. Rossi and S. Prestwich, "Cost-based Filtering for Stochastic Inventory Control", Recent Advances in Constraints: 11th Annual ERCIM International Workshop on Constraint Solving and Constraint Logic Programming, CSCLP 2006 Caparica, Portugal, June 26-28, 2006 Revised Selected and Invited Papers, Lecture Notes in Computer Science, Springer-Verlag, LNCS 4651, pp.169-183, 2007
	R. Rossi, S. A. Tarim, B. Hnich and S. Prestwich, "Cost-based Filtering for Stochastic Inventory Systems with Shortage Cost", Thirteenth International Conference on Principles and Practice of Constraint Programming (CP-07), Doctoral Program Proceedings, Providence (RI), 2007
	R. Rossi, S. Prestwich, "A Global Constraint for Computing Exact Buffer Stock Levels in Stochastic Inventory Control", Twelfth International Conference on Principles and Practice of Constraint Programming (CP-06), Doctoral Program Proceedings, Nantes, 2006

Hobbies

Music

One of the songs I have written

Travels

Places I have visited

 

Recreational Mathematics

What is recreational mathematics?

• One of the earliest known collection of recreational mathematics problems by Alcuin of York: propositiones ad acuendos juvenes
• L. Pacioli, De Divina Proportione, Library of congress digital version
• Euclide, Elementi, traduzione di Nicola Tartaglia
• The Central Limit Theorem
• Hypercubic Numbers
• Recreational mathematics on MathWorld