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Number of items: 41.

Lewis, Rhyd 2020. Five degrees of separation from De Niro - charting the social networks of movie stars. The Conversation , -.

Thiruvady, Dhananjay, Lewis, Rhyd and Morgan, Kerri 2020. Tackling the maximum happy vertices problem in large networks. 4OR: A Quarterly Journal of Operations Research 10.1007/s10288-020-00431-4
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Lewis, Rhyd 2020. Want to mislead and confuse? use statistics! [Online]. Scientists are Humans. Available at: https://scientistsarehumans.com/2019/01/26/want-to...

Lewis, Rhyd 2020. Who is the centre of the movie universe? Using python and networkX to analyse the social network of movie stars. arXiv. Available at: https://arxiv.org/abs/2002.11103

Lewis, R., Thiruvady, D. and Morgan, K. 2019. Finding happiness: An analysis of the maximum happy vertices problem. Computers and Operations Research 103 , p. 265. 10.1016/j.cor.2018.11.015

Hawa, Asyl L., Lewis, Rhyd and Thompson, Jonathan M. 2018. Heuristics for the score-constrained strip-packing problem. Presented at: COCOA 2018: International Conference on Combinatorial Optimization and Applications, Atlanta, GA, USA, 15-17 December 2018. Published in: Kim, Donghyun, Uma, R. N. and Zelikovsky, Alexander eds. Combinatorial Optimization and Applications: 12th International Conference, COCOA 2018, Atlanta, GA, USA, December 15-17, 2018, Proceedings. Lecture Notes in Computer Science Springer Verlag, p. 449. 10.1007/978-3-030-04651-4_30

Lewis, Rhydian 2018. Two example optimisation problems from the world of education. Presented at: OR Society Annual Conference (OR60), Lancaster, UK, 11-13 Sep 2018.

Lewis, Rhyd and Smith-Miles, K. 2018. A heuristic algorithm for finding cost-effective solutions to real-world school bus routing problems. Journal of Discrete Algorithms 52-53 , pp. 2-17. 10.1016/j.jda.2018.11.001

Hardy, Bradley, Lewis, Rhyd and Thompson, Jonathan 2018. Tackling the edge dynamic graph colouring problem with and without future adjacency information. Journal of Heuristics 24 , pp. 321-343. 10.1007/s10732-017-9327-z

Lewis, Rhydian, Smith-Miles, Kate and Phillips, Kyle 2018. The school bus routing problem: An analysis and algorithm. Presented at: IWOCA 2017: 28th International Workshop on Combinatorial Algorithms, Newcastle, NSW, Australia, 17-21 July 2017. Published in: Brankovic, Ljiljana, Ryan, Joe and Smyth, William F. eds. Combinatorial Algorithms: 28th International Workshop, IWOCA 2017, Newcastle, NSW, Australia, July 17-21, 2017, Revised Selected Papers. Lecture Notes in Computer Science Springer, pp. 287-298. 10.1007/978-3-319-78825-8_24

Lewis, Rhyd and Holborn, Penny 2017. How to pack trapezoids: exact and evolutionary algorithms. IEEE Transactions on Evolutionary Computation 21 (3) , pp. 463-476. 10.1109/TEVC.2016.2609000

Lewis, Rhyd and Carroll, Fiona 2016. Creating seating plans: a practical application. Journal of the Operational Research Society 67 (11) , pp. 1353-1362. 10.1057/jors.2016.34

Padungwech, Wasin, Thompson, Jonathan and Lewis, Rhyd 2016. Investigating edge-reordering procedures in a tabu search algorithm for the capacitated arc routing problem. Presented at: HM 2016: International Workshop on Hybrid Metaheuristics, Plymouth, UK, 8-10 June 2016. Published in: Blesa, Maria J., Blum, Christian and Cangelosi, Angelo eds. Hybrid Metaheuristics: 10th International Workshop, HM 2016, Plymouth, UK, June 8-10, 2016, Proceedings. Lecture Notes in Computer Science Cham: Springer, pp. 62-74. 10.1007/978-3-319-39636-1_5

Hardy, Bradley, Lewis, Rhyd and Thompson, Jonathan Mark 2016. Modifying colourings between time-steps to tackle changes in dynamic random graphs. Presented at: EvoCOP 2016: European Conference on Evolutionary Computation in Combinatorial Optimization, Porto, Portugal, 30 March - 1 April 2016. Published in: Chicano, Francisco, Hu, Bin and Garcia-Sanchez, Pablo eds. Evolutionary Computation in Combinatorial Optimization: 16th European Conference, EvoCOP 2016, Porto, Portugal, March 30 – April 1, 2016, Proceedings. Springer, pp. 186-201. 10.1007/978-3-319-30698-8_13

Lewis, Rhydian 2016. Graph colouring: an ancient problem with modern applications. Impact 3 (1) , pp. 47-50. 10.1080/2058802X.2016.11963998

Kheiri, Ahmed, Özcan, Ender, Lewis, Rhydian and Thompson, Jonathan 2016. A Sequence-based selection hyper-heuristic: a case study in nurse rostering. Presented at: PATAT 2016: 11th International Conference on the Practice and Theory of Automated Timetabling, Udine, Italy, 23-26 August 2016. Published in: Burke, Edmund K., Di Gaspero, Luca, Özcan, Ender, McCollum, Barry and Schaerf, Andrea eds. PATAT 2016: Proceedings of the 11th International Conference of the Practice and Theory of Automated Timetabling. pp. 503-505.

Lewis, R. M. R. 2015. A guide to graph colouring: algorithms and applications. Springer. 10.1007/978-3-319-25730-3

Lewis, R. and Thompson, J. 2015. Analysing the effects of solution space connectivity with an effective metaheuristic for the course timetabling problem. European Journal of Operational Research 240 (3) , pp. 637-648. 10.1016/j.ejor.2014.07.041

Lewis, Rhyd 2015. Graph coloring and recombination. In: Kacprzyk, J. and Pedrycz, W. eds. Springer Handbook of Computational Intelligence, Springer, pp. 1239-1254.

Rowse, Elizabeth Louise, Lewis, Rhydian, Harper, Paul Robert and Thompson, Jonathan Mark 2015. Applying set partitioning methods in the construction of operating theatre schedules. Presented at: International Conference on Theory and Practice in Modern Computing 2015, Las Palmas de Gran Canaria, Spain, 22-24 July 2015.

Smith-Miles, Kate, Baatar, Davaatseren, Wreford, Brendan and Lewis, Rhyd 2014. Towards objective measures of algorithm performance across instance space. Computers & Operations Research 45 , pp. 12-24. 10.1016/j.cor.2013.11.015

John, Matthew P., Mumford, Christine L. and Lewis, Rhyd 2014. An improved multi-objective algorithm for the urban transit routing problem. Presented at: EvoCOP 2014: 14th European Conference on Evolutionary Computation in Combinatorial Optimization, Granada, Spain, 23-25 April 2014. Published in: Blum, Christian and Ochoa, Gabriela eds. Evolutionary Computation in Combinatorial Optimisation: 14th European Conference, EvoCOP 2014, Granada, Spain, April 23-25, 2014, Revised Selected Papers. Lecture Notes in Computer Science Springer, pp. 49-60. 10.1007/978-3-662-44320-0_5

Cooper, Ian, John, Matthew P., Lewis, Rhydian, Mumford, Christine Lesley and Olden, Andrew 2014. Optimising large scale public transport network design problems using mixed-mode parallel multi-objective evolutionary algorithms. Presented at: IEEE Congress on Evolutionary Computation, Beijing, China, 6 - 11 July 2014. Evolutionary Computation (CEC). IEEE, pp. 2841-2848. 10.1109/CEC.2014.6900362

Lewis, Rhydian and Carroll, Fiona 2013. The "engaged" interaction: important considerations for the HCI design and development of a web application for solving a complex combinatorial optimization problem. World Journal of Computer Application and Technology 1 (3) , pp. 75-82.

Lewis, Rhyd, Thompson, Jonathan Mark, Mumford, Christine Lesley and Gillard, Jonathan William 2012. A wide-ranging computational comparison of high-performance graph colouring algorithms. Computers & Operations Research 39 (9) , pp. 1933-1950. 10.1016/j.cor.2011.08.010

Song, Xiang, Lewis, Rhyd, Thompson, Jonathan Mark and Wu, Yue 2012. An incomplete m-exchange algorithm for solving the large-scale multi-scenario knapsack problem. Computers & Operations Research 39 (9) , pp. 1988-2000. 10.1016/j.cor.2011.09.012

Lewis, Rhyd 2012. A time-dependent metaheuristic algorithm for post enrolment-based course timetabling. Annals of Operations Research 194 (1) , pp. 273-289. 10.1007/s10479-010-0696-z

Holborn, Penny Louise, Thompson, Jonathan Mark and Lewis, Rhyd 2012. Combining heuristic and exact methods to solve the vehicle routing problem with pickups, deliveries and time windows. Presented at: EvoCOP 2012: 12th European Conference on Evolutionary Computation in Combinatorial Optimization, Malaga, Spain, 11-13 April 2012. Published in: Hao, J. K. and Middendorf, M. eds. Evolutionary Computation in Combinatorial Optimization: 12th European Conference, EvoCOP 2012, Málaga, Spain, April 11-13, 2012. Proceedings. Lecture Notes in Computer Science Springer Verlag, pp. 63-74. 10.1007/978-3-642-29124-1_6

Lewis, Rhyd, Song, Xiang, Dowsland, Kathryn Anne and Thompson, Jonathan Mark 2011. An investigation into two bin packing problems with ordering and orientation implications. European Journal of Operational Research 213 (1) , pp. 52-65. 10.1016/j.ejor.2011.03.016

Lewis, Rhyd and Thompson, Jonathan Mark 2011. On the application of graph colouring techniques in round-robin sports scheduling. Computers & Operations Research 38 (1) , pp. 190-204. 10.1016/j.cor.2010.04.012

Lewis, Rhyd and Pullin, Emma J. 2011. Revisiting the restricted growth function genetic algorithm for grouping problems. Evolutionary Computation 19 (4) , pp. 693-704. 10.1162/EVCO_a_00040

Song, Xiang, Chu, C. B., Lewis, Rhyd, Nie, Y. Y. and Thompson, Jonathan Mark 2010. A worst case analysis of a dynamic programming-based heuristic algorithm for 2D unconstrained guillotine cutting. European Journal of Operational Research 202 (2) , pp. 368-378. 10.1016/j.ejor.2009.05.047

McCollum, B., Schaerf, A., Paechter, B., McMullan, P., Lewis, Rhyd, Parkes, A. J., Gaspero, L. D., Qu, R. and Burke, E. K. 2009. Setting the Research Agenda in Automated Timetabling: The Second International Timetabling Competition. INFORMS Journal on Computing 22 (1) , pp. 120-130. 10.1287/ijoc.1090.0320

Lewis, Rhyd 2009. A general-purpose hill-climbing method for order independent minimum grouping problems: A case study in graph colouring and bin packing. Computers & Operations Research 36 (7) , pp. 2295-2310. 10.1016/j.cor.2008.09.004

Lewis, Rhydian, Paechter, Ben and McCollum, Barry 2007. Post enrolment based course timetabling: a description of the problem model used for track two of the second International Timetabling Competition. [Working Paper]. Cardiff Working Papers in Accounting and Finance, Cardiff: Cardiff University.

Lewis, Rhyd and Paechter, Ben 2007. Finding feasible timetables using group-based operators. IEEE Transactions on Evolutionary Computation 11 (3) , pp. 397-413. 10.1109/TEVC.2006.885162

Lewis, Rhyd 2007. A survey of metaheuristic-based techniques for university timetabling problems. OR Spectrum 30 (1) , pp. 167-190. 10.1007/s00291-007-0097-0

Lewis, Rhyd 2007. Metaheuristics can solve sudoku puzzles. Journal of Heuristics 13 (4) , pp. 387-401. 10.1007/s10732-007-9012-8

Lewis, Rhyd 2007. On the combination of constraint programming and stochastic search: the Sudoku case. Hybrid Metaheuristics, Lecture Notes in Computer Science, vol. 4771. Springer, pp. 96-107. (10.1007/978-3-540-75514-2_8)

Lewis, Rhyd, Paechter, Ben and Rossi-Doria, Olivia 2007. Metaheuristics for university course timetabling. In: Dahal, Keshav P., Tan, Kay Chen and Cowling, Peter I. eds. Evolutionary Scheduling, Studies in Computational Intelligence, vol. 49. Springer, pp. 237-272. (10.1007/978-3-540-48584-1_9)

Lewis, Rhyd and Paechter, Ben 2005. Application of the grouping genetic algorithm to university course timetabling. Lecture Notes in Computer Science 3448 , pp. 144-153. 10.1007/978-3-540-31996-2_14

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