Efthymios Housos
University of Patras
52 Papers
375 Citations
Efthymios Housos is an academic researcher from University of Patras. The author has contributed to research in topics: Scheduling (computing) & Optimization problem. The author has an hindex of 17, co-authored 51 publications. Previous affiliations of Efthymios Housos include Bell Labs & American Electric Power.
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Papers
An integer programming formulation for a case study in university timetabling
TL;DR: A novel 0–1 integer programming formulation of the university timetabling problem is presented and it is shown that this model is solvable by existing software tools with IP solvers, even for large departments.
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Hybrid optimization techniques for the workshift and rest assignment of nursing personnel
TL;DR: A model that satisfies the rules of a typical hospital environment based both on published research data and on local hospital requirements is designed and an efficient solution methodology for the monthly workshift and rest assignment of hospital nursing personnel is presented.
135
A systematic two phase approach for the nurse rostering problem
Christos Valouxis,Christos Gogos,Christos Gogos,George Goulas,Panayiotis Alefragis,Panayiotis Alefragis,Efthymios Housos +6 more
TL;DR: The results of the approach and the submitted software produced excellent solutions for both the known and the hidden problem instances, which gave the team the first position in all tracks of the INRC-2010 competition.
120
Constraint programming approach for school timetabling
TL;DR: The timetabling problem for a typical high school environment was modeled and solved using a constraint programming (CP) approach and operations research (OR) models and local search techniques were also used in order to assist the CP search process by effectively reducing the solution search space.
97
Steady State Network Equivalents for Power System Planning Applications
TL;DR: In this article, REI (Radial Equivalent Independent) equivalence technique and some practical considerations with regard to its implementation are discussed and several equivalents of REI are examined and compared.
89