No abstract

No abstract

No abstract

The aim of this study was to analyze the effect of a comprehensive teaching program, based on questioning on decision making, and execution in football. The intervention program, based on teaching games for understanding model and including the application of questioning in a context of modified games, was applied during 21 training sessions. A quasi-experimental study with a prepost design with 18 male football players (M ¼ 10.7 years, SD ¼ 0.6) was developed over 18 weeks. Participants were divided into experimental group (n ¼ 9) and control group (n ¼ 9). A total of 1532 actions were observed (1120 passes and 412 dribbling). Results showed that after applying the intervention program, the players in the experimental group showed better decision making in the pass and dribbling actions, and better execution in the pass action, compared with the players from the control group. These results suggest that the application of questioning in a context of modified games must be taken into account to promote tactical training in young footballers and to improve their tactical behavior.

This paper presents a review of advanced architectures based on the partial power processing concept, whose main objective is to achieve a reduction of the power processed by the converter. If the power processed by the converter is decreased, the power losses generated by the power converter are reduced, obtaining lower sized converters and higher system efficiencies. Through the review 3 different partial power processing strategies are distinguished: Differential Power Converters, Partial Power Converters and Mixed strategies. Each strategy is subdivided into smaller groups that entail different architectures with their own advantages and disadvantages. Also, due to the lack of agreement that exists in the sources around the naming of the different architectures, this paper seeks to stablish a nomenclature that avoids confusion when indexing this type of architectures. Regarding Partial Power Converters an extensive application oriented description is also developed. Finally, the main conclusions obtained through the review are presented.