Publications by Year: 2019

2019
Drikos, S., & Tsoukos, A. (2019). Teaching offence system 5:1 and evaluating performance in volleyball based on a spreadsheet.. In 11th Conference on Informatics in Education 2019 (pp. 362-373). University of Piraeus.Abstract
Information and Communication Technologies can have a positive impact on the learning environment by providing Physical Education teachers with a tool-kit for a complementary, alternative form of teaching knowledge objects in the Physical Education area. In volleyball teaching the system 5: 1 (5 hitters-1 setter) is difficult due to the complexity of the rotation rules. An interdisciplinary micro scenario, which includes monitoring of a multimedia application, practicing the team’s rotations by completing a relevant spreadsheet, applying a training protocol with evaluation of volleyball skills accompanied by quantification and visualization of positive, negative or neutral probability in a rally helps students both understand both the 5: 1 volleyball system and elements of Statistics.
Drikos, S. (2019). Complex 1 in Male Volleyball as a Markov Chain.. In D. Karlis, Ntzoufras, I., & Drikos, S. (Eds.), MATHSPORT INTERNATIONAL 2019 CONFERENCE (pp. 80-85). Athens University Economics and Business.Abstract
In Volleyball, complex 1 consists of the serve’s pass (reception) - setting - attack skills in this specified order. This sequence is a stable pattern to win a point. Furthermore, it is important for the teams’ success. Taking into account that this pattern is a first-order Markov chain, the creation of a probability transition matrix is feasible. Assuming multinomial likelihood with a Dirichlet prior on the transition probabilities a Markovian transition matrix can be constructed and the calculation of conditional success probabilities is, thus, achievable. Data from the performance analysis of the winning team from recent world championships in three age categories (U19, U21, Men) of male Volleyball is used. The findings lead to redefining target pass area and to shrinking the evaluation scale at least for the teams under study. Moreover, pass accuracy is necessary because it must give at least two options for attack, but not sufficient condition for the success of attack in all age categories for male Volleyball. In the U19 age category, there is a lack of stabilization in the complex 1 sequence after pass against jump spin serve.