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Recent Submissions

Health-based physical education in an elementary school: effects on physical self-concept, motivation, fitness and physical activity
(ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2024) Fernández Bustos, Juan gregorio; Cuesta Valera, Pablo; Zamorano García, David; Simón Piqueras, Juan Ángel
Background: Promoting and developing health in Physical Education should not be limited to seeking to meet recommendations for physical activity and to increase motor competence or physical fitness, but should provide students with the motivation, confidence and knowledge required for them to be active for life. The Health-based Physical Education model (HbPE) is one of the most interesting models for health development. It takes a holistic perspective of health that is compatible with the salutogenic approach, where promoting and appreciating an active life is a core element (Haerens et al. 2011). Purpose: The aim of this study was to examine the effects of a Health-based Physical Education programme on health-related factors (physical fitness and moderate-to-vigorous physical activity), emotional well-being (self-esteem and physical self-concept), and motivational factors (intention to be physically active and the degree of self-determination during practice). Methods: A quasi-experimental design with pre- and post-test measures was applied to a sample composed of 131 schoolchildren aged 10 to 12 years (M = 10.87 ± 0.69) belonging to six randomly assigned class groups: three to the experimental group (n = 67) and three to the control group (n = 64). The experimental group participated in an intervention programme based on the HbPE model linked to a set of strategies to promote commitment, motivation and participation, while the control group completed a traditional programme for physical fitness improvement. As measures, we used Polar® HR monitors, the ALPHA-Fitness battery, the Motivation in Physical Education Questionnaire in Primary Education, the Intention to Be Physically Active Scale and the Pictorial Scale of Physical Self-Concept for Younger Children. Findings: The experimental group showed higher levels of moderate-to-vigorous physical activity and a significant increase in physical fitness, including a reduction in BMI. Moreover, this group presented improvements in socio-emotional self-esteem, intrinsic motivation and the intention to be physically active. Nevertheless, against our hypothesis, quantitative analyses indicated no differences in physical self-concept. Conclusion: These results support the use of HbPE as a model for designing and implementing health-promoting programmes that are compatible with a salutogenic approach. Apart from increasing physical activity and improving physical fitness, such programmes would provide knowledge and attitudes to foster practice beyond school.
Influence of natural aggregates typology on recycled concrete strength
(Elsevier, 2016) Laserna Arcas, Santiago eduardo; Montero Martínez, Jesús
This paper reports a study on recycled aggregates concrete to analyze the influence of using two different types of natural aggregates, river aggregates and crushed aggregates, on the strength properties of recycled aggregates concrete. A total of twenty different mixes were analyzed with an effective water/cement ratio of 0.5 and cement contents of 260?300?340 kg/m3 for recycled rates of coarse aggregates of 0?20?50?100%. The results show that the strength property depends of the type of natural aggregate used and of the recycled replacement ratio. An increment of 15% on compressive strength was obtained for river natural aggregates and 100% recycled replacement ratio, while a decrease of approximately 10?25% was observed for mixtures with crushed natural aggregates performed under similar manufacturing conditions.
Influence of Effective Mixing Water in Recycled Concrete
(Elsevier, 2017) Laserna Arcas, Santiago eduardo; Montero Martínez, Jesús
This study analyzes the influence of two different modes for estimating the volume of mixing water (total water and effective water) on the dosing and behavior of recycled aggregate concrete. Different concrete mixtures of conventional and recycled concrete are analyzed to determine the relationship between slump and compressive strength according to the total and effective water/cement ratios. Furthermore, to avoid the pre-saturation of recycled aggregates, an improved mixing methodology for manufacturing of recycled concrete based on the best characteristics of two-stage mixing methods as well as on the water absorption speed is recommended. The results suggest that recycled concrete requires a minimal time to achieve an adequate mix and demonstrate that an increase in total water in recycled concrete does not result in strength reduction when the mixtures were dosed with the same volume of effective water. Furthermore, these results conflict with the recommendation to increase the cement content due to the extra volume of water needed for the recycled mix to maintain the slump and a constant water/cement ratio.
Modelo hidráulico para la optimización de subunidades irregulares de riego por goteo
(Tierras agricultura, 2020) Cervera Gascó, Jorge; Del castillo Sánchez-cañamares, Amaro; Montero Martínez, Jesús; Tarjuelo Martín-Benito, José María, José maría; Moreno Hidalgo, Miguel ángel
Nowadays, water resources are limited especially in places with arid and semi-arid conditions. For that reason, it is essential the development of decision support system models (DSS) aiming the design and management of irrigation systems, especially when they are fed with photovoltaic energy. The main objective of this study was the development of a hydraulic model linked with a photovoltaic model, considering the most general case of irrigation subunits with irregular shape and topography. Thus, a decision support system tool (DSS) for the design and management irrigation with photovoltaic power is developed. Analyzing the irrigation quality in different subunit with irregular shape and topography is a main issue in precision irrigation. For model calibration and validation has been applied in an almond field with 90 ha with drip irrigation located in a shape and topography land. The results enabled us to identify the areas with uniformity problems depending on the pressure in the subnit head.
Commitment, perception and evidence-based practice training in Spanish nursing students:
(Wiley, 2023) Gómez Salgado, Juan; Rodríguez Almagro, Julián; Molina Alarcón, Milagros; Martínez Galiano, Juan Miguel; Solano Ruiz, María del Carmen; Hernández Martínez, Antonio
Aims and objectives: To evaluate the commitment and level of self-perceived training in evidence-based practice among students of the Nursing degree of five Spanish universities. Background: In university Health Sciences degrees, evidence-based clinical practice can directly or indirectly impact the quality of care, the cost of the service provided and the safety of clinical practice. Design: Multicentre cross-sectional observational study according to STROBE guidelines. Conclusion: The sample of Nursing degree students has intermediate-high levels of knowledge, skills and attitudes regarding evidence-based practice and work commitment, with differences observed between each of the universities. Relevance to clinical practice: Nursing students should develop from intermediate to high levels of knowledge, skills and attitudes regarding evidence-based practice and work commitment. There are various actions to promote EBP, such as the incorporation of a specific course covering the subject into the nursing curriculum, and the selection, for clinical practices, of care units that implemented evidence-based care.