Ioannis Nikas

Assistant Professor

Department of Tourism Management, University of Patras

Last update: October 29, 2021

Contact Information

Office 1, Department of Tourism Management, M. Alexandrou 1, 26334, Patras (Google map link)

phone_ +30 2610962890

mail_ nikas@upatras.gr

url_ tourism.upatras.gr/nikas || google scholar

Research Interests

  • Sports and Tourism Data Analysis
  • Computational & Stochastic forecasting methods for tourism time-series
  • Nonlinear equations and polynomials
  • Interval equations and polynomials
  • Global optimization with verified results
  • Problems with uncertain parameters
  • Interval analysis methods

Teaching

Tourism Information Systems & Forecasts Laboratory

The Tourism Information Systems and Forecasts Laboratory (TourISFlab) is operating at the Department of Tourism Management of University of Patras. TourISFlab mission is to provide specialized undergraduate and postgraduate education and serve research and develpment needs, as well as transfer and dissemination of knowledge and know-how, indicatively in the following areas: Study of time series with tourism data for decision-making, Development of tourism forecasting models, Visualization of Tourism Statistics, Study of carrying capacity in various regional level of Greece, Tourism Information Systems and world wide web, web page and smart devices apps evaluation, Tourism knowledge management systems. [TourISFlab website]

Publications

Journals

J1. I.A. Nikas, and T.N. Grapsa. Bounding the zeros of an interval equation, Applied Mathematics and Computation, 213(2), pp. 466–478, 2009.
[ScienceDirect ~ PrePrint]

J2. E.N. Malihoutsaki, I.A. Nikas, and T.N. Grapsa. Improved Newton’s method without direct function evaluations, Journal of Computational and Applied Mathematics, 227(1), pp. 206–212, 2009.
[ScienceDirect ~ PrePrint]

J3. C.D. Nikolakakou, T.N. Grapsa, I.A. Nikas, and G.S. Androulakis. A sequential approach for unconstrained optimization via a partitioning technique, International Journal of Computer Mathematics, 92(4), pp. 722-741, 2015.
[Taylor & Francis]

J4. An. Panagopoulos, Al. Panagopoulos, I. Nikas, and T. Grapsa. A Comparative Study on Tourism Demand in Region Western Greece and its Contiguous Regions, Archives of Economic History, 27(2), pp. 19-35, 2015.
[Journal]

J5. Al. Panagopoulos, S. Malefaki, I.A. Nikas. Forecasting The Tourism Demand Using Time-Series – A Case Study On The Prefectures Of Western Greece, “Tourism Research Institute”, Journal of Tourism Research, 11(1), pp. 162-173, 2015.
[Preprint]

J6. A. Koutras, A. Panagopoulos, and I. Nikas. Forecasting Tourism Demand Using Linear and Nonlinear
Prediction Models
, Academica Touristica, 9(1), pp. 85-98, 2016.
[Journal]

J7. I. Poulaki and I.A. Nikas. Measuring tourist behavioral intentions after the first outbreak of COVID19 pandemic crisis. Prima facie evidence from the Greek market, in International Journal of Tourism Cities, doi: 10.1108/IJTC-09-2020-0218, 2021
[Emerald Insight ~ In pdf]

Chapters

B1. A. Koutras, A. Panagopoulos, I.A. Nikas. Evaluating the Performance of Linear and Nonlinear Models in Forecasting Tourist Occupancy in the Region ofWestern Greece, In: Katsoni V., Stratigea A. (eds) Tourism and Culture in the Age of Innovation. Springer Proceedings in Business and Economics. Springer, pp. 377-391, 2016.

B2. A. Koutras, A. Panagopoulos, I.A. Nikas. Predicting Tourism Demand In The Western Greece Region Using Independent Component Analysis, In: Katsoni V., Stratigea A. (eds) Tourism and Culture in the Age of Innovation. Springer Proceedings in Business and Economics, pp. 361-375, 2016.

B3. A. Koutras, I.A. Nikas, A. Panagopoulos. Towards Developing Smart Cities: Evidence from GIS Analysis on Tourists? Behavior Using Social Network Data in the City of Athens, In: Katsoni V., Segarra-Ora M. (eds) Smart Tourism as a Driver for Culture and Sustainability. Springer Proceedings in Business and Economics. Springer, Cham, pp. 407-418, 2019.

B4. Nikas I.A., Poulaki I. eSports Tourism: Sports Tourism in a Modern Tourism Environment. In: Katsoni V., van Zyl C. (eds) Culture and Tourism in a Smart, Globalized, and Sustainable World. Springer Proceedings in Business and Economics. Springer, Cham. 2021 doi: 10.1007/978-3-030-72469-6_7
[Springer Link ~ Preprint]

Conferences

C1. D.G. Sotiropoulos, J.A. Nikas, and T.N. Grapsa. Improving the Efficiency of a Polynomial System Solver via a Reordering Technique, Proceedings of 4th GRACM ”Congress on Computational Mechanics”, vol. 3, pages 970-977, 2002.

C2. I.A. Nikas, D.G. Sotiropoulos, and T.N. Grapsa. Extending Interval Newton Method for Nonlinear Parameterized Equations, Proceedings of ICNAAM 2006, International Conference of Numerical Analysis and Applied Mathematics, pages 512-515, 2006.

C3. E.N. Malihoutsaki, I.A. Nikas, and T.N. Grapsa. Improved Newton’s Method Without Direct Function Evaluations, Proceedings of Numan2007 ”Conference in Numerical Analysis”, pages 85-88, September 3-7, 2007.

C4. I.A. Nikas, and T.N. Grapsa. On Solving Efficiently Interval Polynomial Equations of Degree n, Proceedings of Numan2008 ”Conference in Numerical Analysis: Honoring Richard S. Varga on his 80th birthday”, pages 144-147, September 1-5, 2008.

C5. C.D. Nikolakakou, T.N. Grapsa, I.A. Nikas, and G.S. Androulakis. A Lexicographic Approach on Unconstrained Optimization, Proceedings of 23rd Conference on Operational Research (Euro XXIII 2009), page 90, July 05–08, 2009.

C6. I.A. Nikas, T.N. Grapsa, G.S. Androulakis. Global Optimization via Interval Equations, Proceedings of 23rd Conference on Operational Research (Euro XXIII 2009), page 249, July 05–08, 2009.

C7. I.A. Nikas, G.S. Androulakis, T.N. Grapsa. A Hybrid Branch-and-Bound Algorithm for Bound Constrained Optimization, Proceedings of Numan2010 ”Conference in Numerical Analysis, pages 202–207, Chania, September 15–18, 2010.

C8. I.A. Nikas, T.N. Grapsa. An escape-from-local minima technique in unconstrained, In Numan2012 ”5th Conference in Numerical Analysis”, page 34, Ioannina, September 5–8, 2012.

C9. I.A. Nikas. Efficient Unconstrained Optimization Multistart Solvers Using a Self-Clustering Technique, in Proceedings of Numan2014 ”Conference in Numerical Analysis”, pages 204-209, Chania, September 2-5, 2014.

C10. I.A. Nikas, A. Panagopoulos. A heuristic technique for selecting ARIMA models for forecasting tourism time series, In ICOT2015 ”5th International Conference on Tourism, pages 238-251, London, UK, June 24–27, 2015.

C11. G.S. Androulakis, I.A. Nikas, T.N. Grapsa, A. Panagopoulos, Tourism forecasting using backtracking optimization, In ”5th International Conference on Tourism & Hospitality Management”, pages 272-276, Athens, June 05–07, 2015.

C12. E.I. Nikolopoulou, I.A. Nikas, G.S. Androulakis. Redundant constraints identification in linear programming using statistics on constraints, In HELORS2017 ”6th International Symposium and 28th National Conference on Operational Research: OR IN THE DIGITAL ERA – ICT CHALLENGES”, pages 196-201, Thessaloniki, June 8–10, 2017.

C13. Ι. Νίκας, Ι. Κάτσενος, Γ. Ανδρουλάκης. Χρήση της Θεωρίας IRT στην αξιολόγηση της απόδοσης των παικτών ομάδων καλαθοσφαίρισης, Στο 19ο Συνέδριο Διοίκησης Αθλητισμού και Αναψυχής με Διεθνή Συμμετοχή, σελίδες: 75-78, Πάτρα, 16-18 Νοεμβρίου, 2018.

C14. Ι. Νίκας, Γ. Καρολίδης, Γ. Ανδρουλάκης. ΄Αριστοι συνδυασμοί παικτών σε μια ομάδα καλαθοσφαίρισης, Στο 19ο Συνέδριο Διοίκησης Αθλητισμού και Αναψυχής με Διεθνή Συμμετοχή, σελίδες: 79-82, Πάτρα, 16-18 Νοεμβρίου, 2018.

C15. I.A. Nikas, T. Grapsa. Hybridization of bisection method for solving non-differentiable nonlinear equations, In 24th Pan-Hellenic Conference on Informatics (PCI 2020). Association for Computing Machinery, New York, NY, USA, 277-280. DOI: 10.1145/3437120.3437324.

C16. Ε. Κανταρτζή, Μ. Αργυροπούλου, Α. Παναγόπουλος, Γ. Νίκας. Το μουσείο ταξιδεύει: μια κινητή έκθεση με τη βοήθεια της ψηϕιακής τεχνολογίας, 1ο Πανελλήνιο Συνέδριο “Το εκπαιδευτικό παιχνίδι στην τυπική και μη τυπική μάθηση”, 14-15 Νοεμβριου 2020.

C17. D. Maginas, I. Poulaki, A. Papaioannou, I. Nikas. An Evaluation of Customer Relationship Management through Social Media in Aegean Airlines, 4th International Conference of Development and Economy – Virtual – 01-03/12/2020.

C18. Μ. Αργυροπούλου, Α. Παναγόπουλος, Γ. Νίκας, Ι. Πουλάκη. Η έννοια της τουριστικής αειφορίας στην εκπαίδευση: Μια ψηφιακή ευκαιρία, 6ο Πανελλήνιο Συνέδριο “Εκπαίδευση και Πολιτισμός στον 21ο αιώνα”, 23-25 Απριλίου 2021.

People

  • Alkiviades Panagopoulos, Professor, Department of Tourism Management, University of Patras [info]
  • Thedoula N. Grapsa, Professor, Department of Mathematics, University of Patras [info]
  • George Androulakis, Associate Professor, Department of Business Administration, University of Patras [info]
  • Thanasis Koutras, Associate Professor, Department of Electrical & Computer Engineering, University of Peloponnese [info]
  • Ioulia Poulaki, Assistant Professor, Department of Tourism Management, University of Patras [info]
  • Sonia Malefaki, Assistant Professor, Department of Mechanical Engineering and Aeronautics, University of Patras. [info]