• Analyzing passing networks in association football based on the difficulty, risk, and potential of passes 

      Wiig, Astrid Salte; Håland, Else Marie; Stålhane, Magnus; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2019)
      This paper investigates the use of network analysis to identify key players on teams, and patterns of passing within teams, in association football. Networks are constructed based on passes made between players, and ...
    • An application of the multi-depot heterogeneous fixed fleet open vehicle routing problem 

      Husakou, Anatol; Hvattum, Lars Magnus; Danielsen, Ketil; Hoff, Arild (Peer reviewed; Journal article, 2020)
      This work describes an application of a multi-depot heterogeneous fixed fleet open vehicle routing problem. A contractor owns a fleet of vehicles with different capacities and running costs. The fleet is used to transport ...
    • Combined emergency preparedness and operations for safe personnel transport to offshore locations 

      Brachner, Markus; Hvattum, Lars Magnus (Journal article; Peer reviewed, 2016)
      Long distances, sparse infrastructure, and adverse environmental conditions make the offshore emergency preparedness system in the High North a big and yet unsolved challenge. This applies in particular to the personnel ...
    • Combining solutions of the optimum satisfiability problem using evolutionary tunneling 

      da Silva, Rodrigo Ferreira; Hvattum, Lars Magnus; Glover, Fred (Peer reviewed; Journal article, 2020)
      The optimum satisfiability problem involves determining values for Boolean vari- ables to satisfy a Boolean expression, while maximizing the sum of coefficients associated with the variables chosen to be true. Existing ...
    • Comparing bottom-up and top-down ratings for individual soccer players 

      Hvattum, Lars Magnus; Gelade, Garry A. (Peer reviewed; Journal article, 2021)
      Correctly assessing the contributions of an individual player in a team sport is challenging. However, an ability to better evaluate each player can translate into improved team performance, through better recruitment or ...
    • A comprehensive review of plus-minus ratings for evaluating individual players in team sports 

      Hvattum, Lars Magnus (Peer reviewed; Journal article, 2019)
      The increasing availability of data from sports events has led to many new directions of research, and sports analytics can play a role in making better decisions both within a club and at the level of an individual ...
    • Delayed improvement local search 

      Amaral, Heber F.; Urrutia, Sebastián; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2021)
      Local search is a fundamental tool in the development of heuristic algorithms. A neighborhood operator takes a current solution and returns a set of similar solutions, denoted as neighbors. In best improvement local search, ...
    • The double traveling salesman problem with multiple stacks and a choice of container types 

      Hvattum, Lars Magnus; Tirado, Gregorio; Felipe, Ángel (Peer reviewed; Journal article, 2020)
      The double traveling salesman problem with multiple stacks involves the transportation of goods between two regions. In one region, a vehicle carrying a container visits customers, where pallets of goods are loaded into ...
    • Evaluating passing ability in association football 

      Håland, Else Marie; Wiig, Astrid Salte; Stålhane, Magnus; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2020)
      In this paper, the passing ability of football players is determined by building three generalized additive mixed models that each explains a different aspect of a pass’ success: difficulty, risk and potential. The models ...
    • Evaluating the effectiveness of different network flow motifs in association football 

      Håland, Else Marie; Wiig, Astrid Salte; Hvattum, Lars Magnus; Stålhane, Magnus (Peer reviewed; Journal article, 2020)
      In association football, a network flow motif describes how distinct players from a team are involved in a passing sequence. The flow motif encodes whether the same players appear several times in a passing sequence, and ...
    • Exponential extrapolation memory for tabu search 

      Bentsen, Håkon; Hoff, Arild; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2022)
      Tabu search is a well-established metaheuristic framework for solving hard combinatorial optimization problems. At its core, the method uses different forms of memory to guide a local search through the solution space so ...
    • Extended high dimensional indexing approach for reachability queries on very large graphs 

      da Silva, Rodrigo Ferreira; Urrutia, Sebastián; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2021)
      Given a directed acyclic graph G = (V,A) and two vertices u, v ∈ V , the reachability problem is to answer if there is a path from u to v in the graph. In the context of very large graphs, with millions of vertices and a ...
    • Guillotine cutting is asymptotically optimal for packing consecutive squares 

      Balogh, János; Dósa, György; Hvattum, Lars Magnus; Olaj, Tomas; Tuza, Zsolt (Peer reviewed; Journal article, 2022)
      More than half a century ago Martin Gardner popularized a question leading to the benchmark problem of determining the minimum side length of a square into which the squares of sizes 1, 2,..., n can be packed without ...
    • Heuristics for the robust vehicle routing problem with time windows 

      Braaten, Simen V.; Gjønnes, Ola; Hvattum, Lars Magnus; Tirado, Gregorio (Peer reviewed; Journal article, 2017)
      Uncertainty is frequently present in logistics and transportation, where vehicle routing problems play a crucial role. However, due to the complexity inherent in dealing with uncertainty, most research has been devoted to ...
    • In-game betting and the Kelly criterion 

      Andersen, Robin; Hassel, Vegard; Hvattum, Lars Magnus; Stålhane, Magnus (Peer reviewed; Journal article, 2020)
      When a bet with a positive expected return is available, the Kelly criterion can be used to determine the fraction of wealth to wager so as to maximize the expected logarithmic return on investment. Several variants of the ...
    • Load-dependent speed optimization in maritime inventory routing 

      Eide, Line; Årdal, Gro Cesilie Håhjem; Evsikova, Nataliia; Hvattum, Lars Magnus; Urrutia, Sebastián (Peer reviewed; Journal article, 2020)
      Maritime inventory routing problems involve determining optimal routes for seagoing vessels between ports while managing the inventory of each port. Normally, such problems are considered with the vessels operating at fixed ...
    • Long‐term effects of short planning horizons for inventory routing problems 

      Ben Ahmed, Mohamed; Okoronkwo, Onyemaechi Linda; Okoronkwo, Edwin Chimezie; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2022)
      This paper presents a detailed study concerning the importance of the planning horizon when solving inventory routing problems (IRPs). We evaluate the quality of decisions obtained by solving a finite-horizon IRP. We also ...
    • Modelling the financial contribution of soccer players to their clubs 

      Sæbø, Olav Drivenes; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2019)
      This paper presents a framework for evaluating the financial consequences of player transfers as seen from a club’s perspective. To this end, an objective player rating model is designed based on players’ contribution towards ...
    • Multi-objective sustainable location-districting for the collection of municipal solid waste : two case studies 

      Darmian, Sobhan Mostafayi; Moazzeni, Sahar; Hvattum, Lars Magnus (Peer reviewed; Journal article, 2020)
      This paper presents a multi-objective location-districting optimization model for sustainable collection of municipal solid waste, motivated by strategic waste management decisions in Iran. The model aims to design an ...
    • New benchmark instances for the inventory routing problem 

      Skålnes, Jørgen; Ben Ahmed, Mohamed; Hvattum, Lars Magnus; Stålhane, Magnus (Peer reviewed; Journal article, 2024)
      The existing sets of benchmark instances for the inventory routing problem (IRP) have been beneficial for investigating and illustrating the properties of the problem. However, they possess certain features and design ...