This paper presents the evolution of renewable energy generation in Portugal in the last decade, and explains the legislation and incentives in existence. The paper also presents suggestions that could incentive small and medium consumers to install renewable energy power plants (namely of wind power and photovoltaic types) in their facilities. These power plants would have to accomplish present legislation regarding "reactive energy" production during peak power consumption period, and besides, would have to assure power quality levels. On the other hand, reversible energy meters should be used, so that it would be registered the consumption of energy from the energy company, or the delivery of energy to the energy company. The equipments which could implement these characteristics are briefly described. ; Fundação para a Ciência e a Tecnologia, (FCT), ...
Introduction: The leader, in the coach role, must be able to relate and establish connections with his athletes, and contribute to the construction of an environment conducted by fair and clear norms that do not oppose the organizational culture of the club (Lopes, 2008; Mendo & Ortiz, 2003). Objective: The objective of this research was to identify the leadership behaviours of two coaches from different levels (Under 17 and Seniors), as well as the perception of leadership behaviours of their players. Methodology: The sample consisted of two coaches and 26 players, 12 of them in the "Under 17" level aged between 15 and 17 years, and 14 senior players, aged between 18 and 33 years. We used the Leadership Scale for Sports (LSS) / Leadership Scale in Sport, by Chelladurai & Saleh (1978). In this descriptive and inferential study, the Kolmogrov-Smirnov test was performed for the normality assumptions by choosing the parametric statistic and to analyse the differences between the variables, a Student-T test was performed. Five dimensions were analysed: Training Instruction, Social Support, Reinforcement, Democratic Behaviour and Autocratic Behaviour. The results obtained showed significant differences between the coach's self-perception and the players' perception, as well as their preferences and their comparison between levels. According to coaches, the dimension of training instruction and reinforcement, are the styles of leadership with more emphasis and the smaller is the autocratic. ; info:eu-repo/semantics/publishedVersion
This project was supported by the National Funds through FCT - Portuguese Foundation for Science and Technology (UID/DTP/04045/2013) - and the European Fund for regional development (FEDER) allocated by European Union through the COMPETE 2020 Programme (POCI-01-0145-FEDER-006969), and it was supported by the Project NanoSTIMA: Macro-toNano Human Sensing, Towards Integrated Multimodal Health Monitoring and Analytics, NORTE-01-0145-FEDER-000016, co-financed by European Fund for Regional Development (FEDER) - NORTE 2020 ; Research studies agreed that strength and aerobic training either combined or performed separately promote bone density, aerobic capacity, and explosive strength improvements in childhood. Nevertheless, there still is uncertainty regarding to the best training program to be implemented that efficiently improve body fat percentage. The current study aimed to compare different training program's designs on body fat percentage in prepubertal boys.One hundred twenty-three boys (10.93 ± 0.57 years) were randomly assigned into five experimental groups to perform different training protocols for 8 weeks: strength-only (SG), aerobic-only (AG), inter-session concurrent aerobic-strength training (ASG_2), intra-session concurrent aerobic-strength training (ASG), intra-session concurrent strength-aerobic training (SAG), and a control group, no training (CG). SG, AG, ASG and SAG groups performed single sessions two days per week. ASG_2 group performed on different days each week (two and two days per week). The strength training program comprised plyometric exercises (medicine ball throws and jumps) and sprint running. The aerobic training program comprised the 20m shuttle run exercise. Body fat percentage was assessed using a body composition analyzer (Tanita TBF-300A) before and after the 8-weeks of the training program.Body fat percentage showed significant decrements from pre- to the post-training in the ASG_2 (17.6%, p=0.004), SG (16.1%, p=0.000), and SAG (17.7%, p=0.000) groups. There was an impairment in the ASG (4.2%, p=0.492) and control group CG (16.8%, p=0.000). No differences were presented in the AG (p=0.053).The order of intra-session concurrent training influenced body fat percentage changes. Moreover, performing intra-session concurrent strength and aerobic training is more useful than strength or aerobic training only and concurrent training in different sessions to decrease body fat percentage in prepubertal boys. These results have a meaningful interest to optimized school-based fat loss exercise programs in childhood.
Introduction: The leader, in the coach role, must be able to relate and establish connections with his athletes, and contribute to the construction of an environment conducted by fair and clear norms that do not oppose the organizational culture of the club (Lopes, 2008; Mendo & Ortiz, 2003). Objective: The objective of this research was to identify the leadership behaviours of two coaches from different levels (Under 17 and Seniors), as well as the perception of leadership behaviours of their players. Methodology: The sample consisted of two coaches and 26 players, 12 of them in the "Under 17" level aged between 15 and 17 years, and 14 senior players, aged between 18 and 33 years. We used the Leadership Scale for Sports (LSS) / Leadership Scale in Sport, by Chelladurai & Saleh (1978). In this descriptive and inferential study, the Kolmogrov-Smirnov test was performed for the normality assumptions by choosing the parametric statistic and to analyse the differences between the variables, a Student-T test was performed. Five dimensions were analysed: Training Instruction, Social Support, Reinforcement, Democratic Behaviour and Autocratic Behaviour. The results obtained showed significant differences between the coach's self-perception and the players' perception, as well as their preferences and their comparison between levels. According to coaches, the dimension of training instruction and reinforcement, are the styles of leadership with more emphasis and the smaller is the autocratic.
This paper presents the conversion process of a traditional Internal Combustion Engine vehicle into an Electric Vehicle. The main constitutive elements of the Electric Vehicle are presented. The developed powertrain uses a three-phase inverter with Field Oriented Control and space vector modulation. The developed on-board batteries charging system can operate in Grid-to-Vehicle and Vehicle-to-Grid modes. The implemented prototypes were tested, and experimental results are presented. The assembly of these prototypes in the vehicle was made in accordance with the Portuguese legislation about vehicles conversion, and the main adopted solutions are presented. ; FCT – Fundação para a Ciência e Tecnologia in the scope of the project: PEst - ...
