Opinions of Tennis Umpires on in-service education umpiresTenis Hakemlerinin hizmetiçi eğitimlerine ilişkin görüşleri

The purpose of this study is to examine the opinions of tennis umpires of Turkish Tennis Federation regarding tennis umpire’s education and to determine the expectations of the umpire education content. Descriptive method was used in the study. The data were obtained using quantitative techniques. The universe of the study consists of 2662 umpires and the sample group comprises of 419 umpires belonging to Turkish Tennis Federation. The data were collected with the measurement tool developed by the researcher. The umpire evaluation scale included 36 items under four dimensions, including education officers, evaluation of education, education environment and planning of education. Evaluation of items in the scale form was done with five point likert type scale. For the analysis of the data, the normal distribution of the data was first looked at. Because the data were not distributed normally, non-parametric test; Mann Whitney U and Kruskal Wallis tests were used. It can be said that the young tennis umpires are satisfied with the umpires’ training. International tennis umpires think that the umpire education environment and training planning dimensions are better than thought of national umpires. A 9 year and over tennis umpire have more positive opinions about educational environment than tennis referees who are 2 years or less. In general, tennis umpires were found to be satisfied with the teaching staff, but it was determined that the tennis umpires in the 18-29 age group think that the teacing staff are better than the thought tennis referees over the age of 42. In addition, it has emerged that tennis umpires graduated from the sport field think that the umpire training environment is better than the tennis umpires graduated from other fields.Extended English summary is in the end of Full Text PDF (TURKISH) file. ÖzetBu araştırmanın amacı Türkiye Tenis Federasyonu’na bağlı tenis hakemlerinin hakem eğitimine ilişkin görüşlerinin incelenmesi ve hakem eğitimi içeriğine ilişkin beklentilerinin belirlenmesidir. Araştırmada betimsel yöntem kullanılmıştır. Veriler nicel teknik kullanılarak elde edilmiştir. Araştırmanın evreni; 2014 yılında Türkiye Tenis Federasyonu’na bağlı olan 2662 hakem ve örneklemi ise 419 hakemden oluşmaktadır. Veriler araştırmacı tarafından geliştirilen ölçme aracı ile toplanmıştır. Hakem eğitimi değerlendirme ölçeğinde eğitim görevlileri, eğitimi değerlendirme, eğitim ortamı ve eğitimin planlaması olmak üzere dört boyut altında 36 madde yer almıştır. Ölçekte yer alan maddelerin değerlendirilmesi beşli Likert tipi derecelendirme ile yapılmıştır. Verilerin analizi için önce verilerin normal dağılımına bakılmıştır. Veriler normal dağılmadığı için, non-parametrik testlerden Mann Whitney U ve Kruskall Wallis testleri kullanılmıştır. Genç tenis hakemlerinin hakem eğitimi veren eğitim görevlilerinden memnun oldukları söylenebilir. Uluslararası tenis hakemleri ulusal hakemlere göre hakem eğitim ortamının ve eğitimi planlama boyutlarının daha iyi olduğunu düşünmektedirler. 9 yıl ve üzeri hakemlik yapan tenis hakemlerinin, 2 yıl ve daha az hakemlik yapan tenis hakemlerine göre eğitim ortamıyla ilgili görüşleri daha olumludur. Genel anlamda tenis hakemlerinin öğretim elemanlarından memnun olduğu görülürken 18-29 yaş grubundaki tenis hakemlerinin 42 yaş ve üzerindeki tenis hakemlerine göre eğitim görevlileri boyutunun daha iyi olduğunu düşündükleri saptanmıştır. Ayrıca, spor alanı mezunu tenis hakemlerinin, hakem eğitim ortamının diğer alan mezunu tenis hakemlerine göre daha iyi olduğunu düşündükleri ortaya çıkmıştır

Proceedings of Mathsport international 2017 conference

Proceedings of MathSport International 2017 Conference, held in the Botanical Garden of the University of Padua, June 26-28, 2017. MathSport International organizes biennial conferences dedicated to all topics where mathematics and sport meet. Topics include: performance measures, optimization of sports performance, statistics and probability models, mathematical and physical models in sports, competitive strategies, statistics and probability match outcome models, optimal tournament design and scheduling, decision support systems, analysis of rules and adjudication, econometrics in sport, analysis of sporting technologies, financial valuation in sport, e-sports (gaming), betting and sports

Improved Bounds For The Traveling Umpire Problem: A Stronger Formulation And A Relax-and-fix Heuristic

Given a double round-robin tournament, the traveling umpire problem (TUP) consists of determining which games will be handled by each one of several umpire crews during the tournament. The objective is to minimize the total distance traveled by the umpires, while respecting constraints that include visiting every team at home, and not seeing a team or venue too often. We strengthen a known integer programming formulation for the TUP and use it to implement a relax-and-fix heuristic that improves the quality of 24 out of 25 best-known feasible solutions to instances in the TUP benchmark. We also improve all best-known lower bounds for those instances and, for the first time, provide lower bounds for instances with more than 16 teams. © 2014 Elsevier B.V. All rights reserved.2362592600Ernst, A., Jiang, H., Krishnamoorthy, M., Owens, B., Sier, D., An annotated bibliography of personnel scheduling and rostering (2004) Annals of Operations Research, 127, pp. 21-144Evans, J.R., A microcomputer-based decision support system for scheduling umpires in the american baseball league (1988) Interfaces, 18, pp. 42-51Evans, J.R., Hebert, J.E., Deckro, R.F., Play ball - The scheduling of sports officials (1984) Perspectives in Computing, 4, pp. 18-29Farmer, A., Smith, J.S., Miller, L.T., Scheduling umpire crews for professional tennis tournaments (2007) Interfaces, 37, pp. 187-196Kendall, G., Knust, S., Ribeiro, C.C., Urrutia, S., Scheduling in sports: An annotated bibliography (2010) Computers & Operations Research, 37, pp. 1-19Trick, M.A., (2013) Traveling Umpire Problem: Data Sets and Results, , http://mat.tepper.cmu.edu/TUP, (Last accessed: 07.08.13)Trick, M.A., Yildiz, H., Benders' cuts guided large neighborhood search for the traveling umpire problem (2007) Proceedings of the Fourth Conference on Integration of AI and or Techniques in Constraint Programming for Combinatorial Optimization Problems (CP-AI-OR), 4510, pp. 332-345. , P. Van Hentenryck, L. Wolsey, Lecture notes in computer science Springer-VerlagTrick, M.A., Yildiz, H., Benders' cuts guided large neighborhood search for the traveling umpire problem (2011) Naval Research Logistics, 58, pp. 771-781Trick, M.A., Yildiz, H., Locally optimized crossover for the traveling umpire problem (2012) European Journal of Operational Research, 216, pp. 286-292Trick, M.A., Yildiz, H., Yunes, T., Scheduling major league baseball umpires and the traveling umpire problem (2012) Interfaces, 42, pp. 232-244Wauters, T., (2013) Een Nieuwe (Meta)heuristiek voor Het Traveling Umpire Problem, , http://www.kuleuven-kulak.be/nl/onderzoek/Wetenschappen/Informatica/ travelingumpireproblem, Katholieke Universiteit Leuven, Belgium. Bachelor's Thesis Proposal (abstract in Dutchsee Wauters, T., (2013) Solution Posted on the Traveling Umpire Problem Benchmark Web Site As of August 2013Wolsey, L.A., (1998) Integer Programming, , Wiley-InterscienceWright, M.B., Scheduling english cricket umpires (1991) Journal of the Operational Research Society, 42, pp. 447-452Yavuz, M., Inan, U.H., Fiǧlali, A., Fair referee assignments for professional football leagues (2008) Computers & Operations Research, 35, pp. 2937-2951Yildiz, H., (2008) Methodologies and Applications for Scheduling, Routing & Related Problems, , Ph.D. thesis Tepper School of Business. Carnegie Mellon Universit