ESECS - Artigos em revistas internacionais
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Percorrer ESECS - Artigos em revistas internacionais por Objetivos de Desenvolvimento Sustentável (ODS) "05:Igualdade de Género"
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- Authentic leadership promoting employees' psychological capital and creativityPublication . Rego, Arménio; Sousa, Filipa; Marques, Carla; Pina e Cunha, MiguelTwo hundred and one employees report their psychological capital, as well as their supervisors' authentic leadership. Supervisors describe the employees' creativity. The main findings show that authentic leadership predicts employees' creativity, both directly and through the mediating role of employees' psychological capital. The study empirically validates theoretical arguments that suggest integrating authentic leadership and psychological capital in research, and indicates that both may foster employees' creativity, a crucial resource for helping organizations to face competitive challenges, take advantage of business opportunities, and improve organizational effectiveness.
- Characterization of speed fluctuation and drag force in young swimmers: A gender comparisonPublication . Barbosa, Tiago M.; Costa, Mário J.; Morais, Jorge E.; Morouço, Pedro; Moreira, Marc; Garrido, Nuno D.; Marinho, Daniel A.; Silva, António J.The aim of this study was to compare the speed fluctuation and the drag force in young swimmers between genders. Twenty-three young pubertal swimmers (12 boys and 11 girls) volunteered as subjects. Speed fluctuation was measured using a kinematical mechanical method (i.e., speedo-meter) during a maximal 25-m front crawl bout. Active drag, active drag coefficient and power needed to overcome drag were measured with the velocity perturbation method for another two maximal 25 m front crawl bouts with and without the perturbation device. Passive drag and the passive drag coefficient were estimated using the gliding decay velocity method after a maximal push-off from the wall while being fully immersed. The technique drag index was also assessed as a ratio between active and passive drag. Boys presented meaningfully higher speed fluctuation, active drag, power needed to overcome drag and technique drag index than the girls. There were no significant gender differences for active drag coefficient, passive drag and passive drag oefficient. There were positive and moderate-strong associations between active drag and speed fluctuation when controlling the effects of swim velocity. So, increasing speed fluctuation leads to higher drag force values and those are even higher for boys than for girls.
- Hope and positive affect mediating the authentic leadership and creativity relationshipPublication . Rego, Arménio; Sousa, Filipa; Marques, Carla; Cunha, Miguel Pina eThe study analyzes how authentic leadership (AL) predicts employees' creativity both directly and through the mediating role of employees' positive affect and hope. Two hundred and three employees working in Portuguese retail organizations participate in the research. Employees report their hope and positive affective states, as well as the AL of their supervisors. Supervisors report the employees' creativity. The main findings are: (a) AL predicts employees' creativity, both directly and through the mediating role of employees' hope; (b) AL also predicts employees' positive affect, which in turn predicts employees' hope and, thus, creativity. The study enriches the understanding of the processes through which AL improves employees' creativity, and provides valuable insights for both scholars and practitioners. By promoting AL, and employees' hope and positive affect, organizations may increase employees' creative performance, creativity being an important path to organizational performance.
- Liquid jobs and precarious workers. The Welfare State under pressurePublication . Valadas, CarlaThis article is inspired by one of Zygmund Bauman’s powerful metaphors, the concept of liquid, to interpret the present configuration of jobs and ongoing changes in individuals’ relationship with work. The later materialize in a time when welfare states’ role is going through a process of transformation itself. The sociological framework informing the article is anchored in a Southern European country, Portugal, with an idiosyncratic work and welfare state trajectory. It is argued that, in the liquid phase of our social reality, forms of inclusion into the labour market, such as the ones disseminated through public (active) employment policies, entrap individuals in unstable and insecure forms of employment.
- Natural establishment of Eucalyptus globulus Labill. in burnt stands in PortugalPublication . Águas, Ana; Ferreira, António; Maia, Paula; Fernandes, Paulo M.; Roxo, Luís; Keizer, Jan; Silva, Joaquim S.; Rego, Francisco C.; Moreira, FranciscoExotic tree species are increasingly common in many regions of the world and at least some species are becoming naturalized in the regions where they were introduced. Disturbances like fire may be at the origin or accelerate the naturalization of these species. Portugal holds one of the largest areas of exotic Eucalyptus globulus plantations in the world and is one of the countries most affected by forest fires. These two facts have triggered the present research. This study aimed at characterising medium-term natural establishment of E. globulus plants originated from seeds under natural conditions in burnt planted forests (pure E. globulus stands, pure Pinus pinaster stands, and mixed stands of both species), and at analysing factors associated with this establishment. Occurrence, abundance and height of naturally established E. globulus plants were characterized in 284 sites distributed in burnt areas, across Central and Northern Portugal, 5–7 years after wildfire. Generalized linear models were used to assess the influence of stand type, regional productivity potential, and post-fire management practices on occurrence probability, density, and median height of sampled E. globulus individuals. The influence of these explanatory variables on the structure (in terms of size class distribution) of naturally established E. globulus cohort was examined using analysis of similarity and non-metric multidimensional scaling. Naturally established E. globulus plants were present in 93.1%, 19.0% and 98.6% of samples in pure E. globulus, pure P. pinaster and mixed stands, respectively. Cohort median density was 0.20 plants m−2 and maximum density was 4.55 plants m−2. Median height of plants was 2.0 m and 95.3% of them had h >1.30 m and DBH ⩽5 cm. Establishment probability, density and median height were highest in the most productive regions. Three post-fire management operations had a significant influence on the response variables: (i) salvage logging was associated with a higher density; (ii) tillage was associated with a lower density and a smaller median height; (iii) understorey removal was associated with a lower occurrence probability. Tillage was the only studied factor influencing the size structure of spontaneously established cohort, eliminating larger plants. This study showed that stand type, productivity region and post-fire management operations might have significantly influenced the natural establishment of E. globulus in burnt areas, and consequently the species naturalization process in Portugal. The implications of these findings for management are discussed.
- Social Networks and Performance in Distributed Learning CommunitiesPublication . Cadima, Rita; Ojeda, Jordi; Monguet, Josep M.Social networks play an essential role in learning environments as a key channel for knowledge sharing and students’ support. In distributed learning communities, knowledge sharing does not occur as spontaneously as when a working group shares the same physical space; knowledge sharing depends even more on student informal connections. In this study we analyse two distributed learning communities’ social networks in order to understand how characteristics of the social structure can enhance students’ success and performance. We used a monitoring system for social network data gathering. Results from correlation analyses showed that students’ social network characteristics are related to their performance.
- Strength Training versus Stretching for Improving Range of Motion: A Systematic Review and Meta-AnalysisPublication . Afonso, José; Ramirez-Campillo, Rodrigo; Moscão, João; Rocha, Tiago; Zacca, Rodrigo; Martins, Alexandre; Milheiro, André A.; Ferreira, João; Sarmento, Hugo; Clemente, Filipe Manuel(1) Background: Stretching is known to improve range of motion (ROM), and evidence has suggested that strength training (ST) is effective too. However, it is unclear whether its efficacy is comparable to stretching. The goal was to systematically review and meta-analyze randomized controlled trials (RCTs) assessing the effects of ST and stretching on ROM (INPLASY 10.37766/in-plasy2020.9.0098). (2) Methods: Cochrane Library, EBSCO, PubMed, Scielo, Scopus, and Web of Science were consulted in October 2020 and updated in March 2021, followed by search within reference lists and expert suggestions (no constraints on language or year). Eligibility criteria: (P) Humans of any condition; (I) ST interventions; (C) stretching (O) ROM; (S) supervised RCTs. (3) Re-sults: Eleven articles (n = 452 participants) were included. Pooled data showed no differences between ST and stretching on ROM (ES = −0.22; 95% CI = −0.55 to 0.12; p = 0.206). Sub-group analyses based on risk of bias, active vs. passive ROM, and movement-per-joint analyses showed no between-protocol differences in ROM gains. (4) Conclusions: ST and stretching were not different in their effects on ROM, but the studies were highly heterogeneous in terms of design, protocols and populations, and so further research is warranted. However, the qualitative effects of all the studies were quite homogeneous.
- The Interaction Between Intra-Cyclic Variation of the Velocity and Mean Swimming Velocity in Young Competitive SwimmersPublication . Barbosa, T.; Morouço, Pedro G.; Jesus, S.; Feitosa, W.; Costa, M.; Marinho, D.; Silva, A.; Garrido, N.The aim of this study was to assess the relationship between the intra-cyclic variation of the horizontal velocity (dv) and the velocity of the 4 competitive swimming techniques in young swimmers. 45 young swimmers performed a set of maximal 4 × 25 m (freestyle, backstroke, breaststroke and butterfl y stroke) swims with in water start. A speed-meter cable was attached to the swimmer’s hip. The dv and the swimming velocity were analyzed. Within-subject tests presented signifi cant variations in the dv based on the swimming technique. Post-hoc test revealed signifi cant diff erences across all pairwised swimming techniques (P < 0.001), except for the comparison between freestyle and backstroke (P = 0.98). The dv was higher in the breaststroke, followed by the butterfl y, the backstroke and the freestyle. The quadratic models had the best goodness-of-fi t and the lower error of estimation for the relationship between the dv and the swimming velocity in all swimming techniques (0.24 ≤ R 2 ≤ 0.51). As a conclusion, there is a non-linear relationship where the increase of swimming velocity leads to a decrease of dv in young competitive swimmers.