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February 2018

ALOP-Colloquium with Prof. Dr. Geovani Grapiglia

February 26 / 16:00 - 18:00
Trier University, E Building, Universitätsring 15
Trier, Germany
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Prof. Dr. Geovani Grapiglia of the Universidade Federal do Parana in Curitiba, PR, Brasil will visit with the students of the RTG ALOP to discuss his research as well as speak during our colloquium on the topic of Improved Optimization Methods for Image Registration Problems   Abstract: In many applications, multiple images of the same subject are obtained at different moments in time and under different conditions. The goal is to identify changes in the subject over time. For a…

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March 2018

Prof. Juan Vera and Olga Kuryatnikova of Tilburg University to visit in March

March 5 - March 6
Trier University, E Building, Universitätsring 15
Trier, Germany
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Prof. Juan Vera and Olga Kuryatnikova of Tilburg University are scheduled to visit the Research Training Group ALOP in March for research collaboration.   During their visit, they will speak on the following topics:   Copositive certificates of non-negativity (Prof. Juan Vera) Abstract: Sum-of-squares (sos) certificates of non-negativity, such as Putinar's Positivstellensatz, have been used to obtain powerful numerical techniques to solve polynomial optimization (PO) problems. Using such certificates, hierarchies of semidefinite relaxations are obtained for PO. Usually the use…

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April 2018

ALOP-Colloquium with Prof. Michael Günther

April 16 / 16:00 - 18:00
Trier University E Building, Universitätsring 15
Trier, 54296 Germany
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On Monday, April 16, 2018, at 16:00 Prof. Michael Günther of Bergische Universität Wuppertal will join the ALOP-Colloquium and present his recent work entitled Effiziente numerische Simulation multiphysikalischer Systeme Multiphysikalische Systeme werden oft durch Modelle beschrieben, die DAE-Netzwerkmodelle mit partiellen Differentialgleichungen über geeignete Randbedingungen und Quellterme koppeln. Nach Semidiskretisierung im Ort hat man es dann mit großen, gekoppelten DAE-Sytemen zu tun. In diesem Vortrag werden verschiedene Ansätze zu deren effizienter numerischer Simulation besprochen: Multirate-Verfahren und dynamsche Iteration.   The presentation…

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May 2018

ALOP-Colloquium with Kerstin Lux

May 7 / 16:00 - 18:00

On Monday, May 7, 2018, at 16:00, Kerstin Lux of Universität Mannheim will join the ALOP-Colloquium and present her recent work entitled "Optimal inflow control in supply systems with uncertain demands." Abstract: We are concerned with optimal control strategies subject to uncertain demands. They have a broad range of applications. Taking uncertainty into account becomes more and more important in many areas. In the context of supply chain management, a need for control strategies taking these uncertainties into account naturally…

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ALOP-Colloquium with Prof. Partha Lahiri

May 14 / 16:00 - 18:00
Trier University E Building, Universitätsring 15
Trier, 54296 Germany
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On Monday, May 14, 2018, at 16:00,  Prof. Partha Lahiri of the University of Maryland College Park will join the ALOP-Colloquium and present his recent work entitled "Big data in official statistics." Abstract:  The demand for various socio-economic, transportation, and health statistics for small geographical areas is steadily increasing at a time when survey agencies are desperately looking for ways to reduce costs to meet fixed budgetary requirements.  In the current survey environment, the application of standard sample survey methods…

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June 2018

ALOP-Colloquium with Mehiddin Al-Baali

June 28 / 16:00 - 17:30

On Thursday, June 28, 2018, at 16:00 c.t. Prof. Mehiddin Al-Baali, Department of Mathematics and Statistics, Sultan Qaboos University, Muscat, Oman will present his recent work entitled  On the Damped Technique, Self-Scaling and their Combination when Introduced to the Broyden Family of Methods for Unconstrained Optimization Recently, we have extended the damped-technique in the modified BFGS method of Powell for constrained optimization to the Broyden family of quasi-Newton methods for unconstrained optimization. Appropriate choices for the damped parameter will be…

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October 2018

ALOP Colloquium with Arie M.C.A. Koster

October 29 / 16:00 - 18:00
Trier University E Building, Universitätsring 15
Trier, 54296 Germany
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On Monday, October 29, 2018 at 16:00 c.t. Prof. Dr. Ir. Arie M.C. A. Koster  of RWTH Aachen will present his recent work entitled Robust Combinatorial Optimization - New Problems and Solutions Abstract: The growing need to deal with uncertainties in optimization processes has lead to many new research directions. In robust optimization, an uncertainty set has to be defined containing all scenarios to be considered. Availability of historical data often suggests the use of a discrete or polyhedral uncertainty…

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November 2018

ALOP Colloquium with Caroline Geiersbach

November 26 / 16:00 - 18:00
Trier University E Building, Universitätsring 15
Trier, 54296 Germany
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On Monday, November 26, 2018 at 16:00 c.t.  Caroline Geiersbach of Universität Wien will present her recent work entitled   Stochastic Approximation for Shape Optimization     The presentation will take place in HS 9. Please join us for coffee at 15:45 in E10.

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December 2018

ALOP Colloquium with Frank Vallentin

December 3 / 16:00 - 18:00
Trier University E Building, Universitätsring 15
Trier, 54296 Germany
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On Monday, December 3, 2018 at 16:00 c.t. Prof. Dr. Frank Vallentin of Universität Köln will present his recent work entitled "Chromatic numbers of geometric graphs" Abstract: A classical problem in discrete geometry (due to Hadwiger and Nelson) is to find the minimal number of colors one needs to color all points in the Euclidean plane so that no two points which are distance 1 apart receive the same color. Similar geometric coloring problems can be posed in the context…

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ALOP Colloquium with Ingenuin Gasser

December 6 / 16:00 - 18:00

On Thursday, December 6, 2018 at 16:00 c.t.  Prof. Gasser of Universität Hamburg will present his recent work entitled   Modelling, simulation and optimisation of power plants based on renewable energies   Abstract: In this seminar we discuss the fluid dynamics of  parabolic trough, solar updraft towers, energy towers and osmotic power stations.  The main issue is to discuss simple fluid dynamic models which on one hand describe the main features of the mentioned applications and on the other allow…

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