I have written a small note about mapping a multidimensional index into a unique id. An unique id might be useful e.g. when having multiple state variables in an Markov decision process. Here each state at a stage may be identified using the id.
The from February to May this year I have been teaching in “Seminar in Business Studies” a bachelor course (HA – 4. semester). The course represents a teaching and form of learning where a group of 12 students with one or more teachers discusses selected issues and problems in management science. First the student should write a 10 page report on a specific subject. The report should provide the possibility of in-depth studies of theories, models and methods in management science. While writing the report he can use the assigned advisor for at most 1.5 hours. Second the student, 2 weeks after delivering the report, should give a 10 minutes presentation about their report. Afterwards there is time for 30 minutes of discussion and last 5 minutes for giving a grade. I was assigned 59 students in 6 groups. In 4 of the groups I was the only teacher. In […]
Den 16. marts deltog jeg i kursuset “Vejledning af større studenteropgaver – bachelorprojekt og kandidatafhandling”. Det giver et hurtig overblik over hvilke redskaber man kan bruge i sin vejledning og kan stærkt anbefales.
Two of my papers have been accepted for publication. “Optimal Replacement Policies for Dairy Cows Based on Daily Yield Measurements” have been published in Journal of Dairy Scienc. Abstract: Markov decision processes (MDP) with finite state and action space have often been used to model sequential decision making over time in dairy herds. However, the length of each stage has been at least 1 mo, resulting in models that do not support decisions on a daily basis. The present paper describes the first step of developing an MDP model that can be integrated into a modern herd management system. A hierarchical MDP was formulated for the dairy cow replacement problem with stage lengths of 1 d. It can be used to assist the farmer in replacement decisions on a daily basis and is based on daily milk yield measurements that are available in modern milking systems. Bayesian updating was used […]
From the first of November 2009 I will be working as a Associate Professor at CORAL, Aarhus School of Business, University of Aarhus. I will be doing both research and teaching.
I oktober nummeret af Ny Kvægforskning er der på side 8 en artikel om vores udskiftningsmodel baseret på daglige ydelsesmålinger.
The 16th of October I gave a presentation to a group of students at KU Life about optimal replacement policies for dairy cows based on daily yield measurements. A hierarchical Markov decision process is used to solve the problem. The following downloads are available: presentation – handouts (2×2) – animation 1 2 3
I recent wrote a post about testing external pointers with finalization in R using C++. The test package is now available at R-Forge for inspiration.
Erratum to “An algorithm for ranking assignments using reoptimization” [Computers and Operations Research 35 (2008) 3714-3726] is now available on-line. As pointed out by Dr. A. Volgenant, we unfortunately missed one available implementation written by Miller et al. in IEEE Transactions on Aerospace and Electronic Systems.
The paper “Time-adaptive versus history-adaptive strategies for multicriterion routing in stochastic time-dependent networks” have been published in OR letters.