Judo is a complex sport where many key performance indicators from different ambits (tactic, technique, psychological, etc) impact over the final result of the combat. Then, in order to design optimal training plans for the athletes, decision-makers should carefully analyse the KPI not individually but globally, identifying and quantifying cause-effect relationships between them, being therefore able to align efforts and prioritise medium-long-term actions. In order to do this, and taking into account the difficulty of using statistical techniques because of not only the lack of historic data of the KPI but also due to the subjective nature of many of them, the multi-criteria decision analysis (MCDA) techniques come up as the most appropriate ones. There are many MCDA techniques that could be applied to solve this problem and then this research presents a three-step process to select and assess the most appropriate MCDA techniques using a recent framework. The process outcome nine MCDA techniques appropriate to solve the decision-making problem, being the Analytic Network Process the highest ranked and, therefore, the recommended to be used.

Badminton is a highly competitive event, and athletes must have comprehensive physical and psychological qualities. As an extracurricular sports activity, badminton has been developed in many large and medium-sized cities in my country, and at the same time, badminton in many primary and secondary schools with venue conditions has also been widely developed. This article elaborates on the age of the enlightenment stage, the exercise load of the enlightenment stage, and the principles to be followed in the enlightenment stage training involved in the development of badminton for children. It is hoped that these can be useful for the promotion of badminton in children’s sports activities.

Fe doped CdS thin films are covered on glass substrates at 340±5ºC by ultrasonic spray pyrolysis technique. Fe element incorporated into CdS precursor at volume percentages of 0 to 50% step 10. Structural, compositional, optical, surface and electrical properties of samples are analyzed using X-ray powder diffraction, scanning electron microscope, a spectroscopic ellipsometer, atomic force microscope, four-probe technique, UV/Vis and photoluminescence spectroscopy. All the samples are found to be of single-phase and crystallized in a hexagonal lattice. The x-ray diffraction peaks position of Fe doped CdS shifts to higher angle with increasing Fe concentration indicating a decrease in cell volume. It is observed the optical bandgap changes due to Fe addition. Photoluminescence technique displayed the occurrence of red emission in the CdS nanoparticles. There was a noticeable increase in the PL intensity when Fe concentration increased. Fe doped CdS samples for photovoltaic solar cells could be used as windows layer.

Fuel cells are electrochemical devices that can convert chemical energy into direct electrical energy. Proton exchange membrane fuel cell is one of the several kinds of fuel cells .For understanding the electrical performance of the proton exchange membrane fuel cell, a voltage-current curve is used to explain the physical and chemical relationships and the fundamental operating principles. In this paper, a mathematical model of a proton exchange membrane fuel cellis developed and presented. The effect of various operating parameters (maximum current density, operative current density, cell temperature and the pressure of the reactant gases) on the performance of the proton exchange membrane fuel cellis investigated. The results are validated a previously done work. The results indicate that the model is quite good agreement with the experimental data. The mathematical model is very useful to reduce the investigating cost and avoid time waste for proton exchange membrane fuel cell controlling.