Università degli Studi eCampus
Archivio istituzionale della ricerca - eCampus Università TelematicaNot a member yet
15106 research outputs found
Sort by
Exerting force at the maximal speed drives the increase in power output in elite athletes after 4 weeks of resistance training
No full textPurpose: In the present study, we examined how a 4-week intervention of maximal intended velocity (MIVRT) and controlled velocity resistance training (CRT)-induced task-specific responses in expert individuals. Methods: Twenty elite athletes were randomly assigned to either a MIVRT (n = 10) or CRT (n = 10) group, both following the same volume–load training based on the back-squat three times a week but with different intentions in moving load (force–exertion speed). We assessed one-repetition maximum (1RM), mean propulsive velocity (MPV), and mean propulsive power (MPP) using a progressive-loading test before and after the intervention. A linear position transducer was used to monitor propulsive velocity in training and testing sessions. Results: Both groups significantly increased their 1RM (CRT: + 12.3%, p < 0.001, d = 0.39; MIVRT: + 12.5%, p < 0.001, d = 0.45). Only the MIVRT group showed a significant improvement in MPV (p < 0.01) across different stepping loads, while both groups improved in MPP (MIVRT: + 22.4%, p < 0.001, d = 0.54; CRT: + 8.1%, p = 0.04, d = 0.17). Conclusions: MIVRT induced significant adaptations in MPV and MPP at various loads (%1RM), underlining its specificity in targeting these parameters. Despite similar enhancements in 1RM, the distinct training protocols suggest that strength gains may stem from either maximal intent in moving loads or longer times under tension. This study highlights the role of execution speed in optimizing power outcomes, emphasizing task specificity as paramount to elicit physiological adaptations in chronically strength-trained individuals
Enhancing Smart Communication Security: A Novel Cost Function for Efficient S-Box Generation in Symmetric Key Cryptography
No full textTotal osteocalcin levels are independently associated with worse testicular function and a higher degree of hypothalamic–pituitary–gonadal axis activation in Klinefelter syndrome
No full textPurpose: The role of osteocalcin (OCN) in pubertal development, male hypogonadism, and the effect of testosterone (Te) replacement therapy (TRT) remains unclear. We aimed to investigate the total OCN (tOCN) concentrations in male patients with Klinefelter syndrome (KS), a model of adult hypergonadotropic hypogonadism. Methods: This retrospective longitudinal study investigated 254 male patients with KS (47,XXY) between 2007 and 2021 at an academic referral center, categorized as (1) prepubertal, (2) pubertal, and (3) adults. All prepubertal patients were Te-naïve. Adult patients were subcategorized as (1) eugonadal, (2) hypogonadal, and (3) receiving TRT. We also analyzed 18 adult patients with available tOCN levels before and 3 months after TRT commencement. Results: The tOCN levels varied throughout the lifespan according to pubertal status, were highest in eugonadal and significantly lower in TRT subjects, correlated with both LH (p = 0.017) and FSH levels (p = 0.004) in adults, and significantly declined after 3 months of TRT (p = 0.006) in the adult KS cohort. HPG-axis hormones levels demonstrated no correlation in prepubertal boys. Adjustment for age and body mass index confirmed previous results and revealed significant inverse correlations with total Te (p = 0.004), calculated free Te (p = 0.016), the Te/LH (p = 0.010), and calculated free Te/LH ratios (p = 0.031). Conclusion: In KS, a model of male hypergonadotropic hypogonadism, tOCN levels were not associated with gonadal function during normal prepuberty and pubertal development but were associated with worse testicular function and a higher degree of HPG stimulation in adults. TRT acutely reduced tOCN levels in adults
4-6 Repetition Maximum (RM) and 1-RM Prediction in Free-Weight Bench Press and Smith Machine Squat Based on Body Mass in Male Athletes
No full textThis study aimed to explore the feasibility and face validity of predicting maximum strength 1 repetition maximum (1-RM) and 4-6 RM in athletes across different sports specialties, based on the relationship between muscle strength and BM. One hundred fifteen male athletes, aged 23.63 ± 6.77 years and participating in diverse sports specialties, were included in this study. Muscle strength was assessed using the 4-6 RM and 1-RM tests in free-weight bench press (BP) and Smith machine squat (SQ) exercises, whereas BM was measured using a portable digital scale. A linear regression equation based on muscle strength and BM was performed. The 4-6 RM and 1-RM scores showed excellent intersession relative reliability (intraclass correlation coefficient(2,1): 0.946-0.989) and absolute reliability (CV: 3.4-4.7%) in both BP and SQ exercises. In addition, the magnitude of the relationship and the coefficients used to estimate the 4-6 RM and 1RM, based on BM, differed among the subjects when they are grouped according to their sports specialties (R2 ranged from non-significant to 0.998). Overall, the 4-6 RM test showed a stronger correlation with BM (R: 0.655 for SQ and R: 0.683 for BP) than the 1RM (R: 0.552 for SQ and R: 0.629 for BP), and the general (i.e., not sport-specific) 4 to 6-RM prediction equations should be preferred over sport-specific ones because they are statistically more robust due to the larger sample size. In conclusion, the 4-6 RM can be predicted from BM with high reliability, a moderate association, and a prediction error that, when considering the 4-6 RM as a starting point for estimating of the 1RM, can be considered entirely acceptable in practical settings
El framework PLAYFIELD como perspectiva de enseñanza y aprendizaje en la escuela en el hospital
No full textUn grupo de trabajo compuesto por psicólogos, pedagogos, médicos y profesionales del ejercicio está llevando a cabo la validación del marco PLAYFIELD, un marco basado en los conceptos clave de la Physical Literacy (Whitehead 2001, Jurbala 2015), aplicado en su primera fase en contextos educativos no estándar. PLAYFIELD es un acrónimo de Physical Literacy Activate Your Framework for Integrated Embodied Learning Design. Fue desarrollado por la Università Cattolica del Sacro Cuore y la Universidad eCampus, en colaboración con la escuela hospitalaria "IC Salvo d'Acquisto" y el Centro Maria Letizia Verga de Monza (Ferrari et al., 2022). Se refiere al cuerpo como un sistema activo, inseparable de los procesos de aprendizaje (Stolz 2014), incluso en contextos de fragilidad relacionados con situaciones de enfermedad en la infancia.
En este contexto, todas las fases de la acción didáctica (Rivoltella, Rossi, 2022): desde la planificación, la práctica y la evaluación del aprendizaje. No es obvio que la dimensión corporal pueda ser una parte fundamental de dicho proceso. PLAYFIELD se convierte en una herramienta para activar procesos de cognición incorporada (Borghi & Cimatti, 2010) ya que el constructo de Physical Literacy (PL), utiliza la conciencia del propio cuerpo y sus capacidades de movimiento, como una competencia que se debe aprender y desarrollar a lo largo de toda la vida como apoyo a los procesos de aprendizaje, incluso en condiciones donde el cuerpo es un cuerpo enfermo.
El análisis de la literatura demuestra que existe una falta de estudios sobre el marco teórico y las estrategias de aplicación práctica de la PL que puedan llevar a una mejora significativa en el desarrollo de habilidades motoras en condiciones de hospitalización. La educación y la salud son dos aspectos estrechamente relacionados que aumentan el bienestar físico y mental de los niños. Cuando se pierden las oportunidades de participar en la vida escolar debido a una enfermedad que obliga a largas estancias en el hospital, surgen nuevas necesidades de sinergia para la atención por parte de los profesionales involucrados en el cuidado de la persona.
PLAYFIELD facilita y requiere la activación de nuevas alianzas entre profesionales de diferentes sectores, tratando de apoyar a maestros, educadores, profesionales del ejercicio y personal médico-sanitario en la introducción en sus prácticas profesionales de las 4 dimensiones de la PL (cognitiva, comportamental, emocional y motora) de manera sinérgica, sin la predominancia de un área sobre otra, tal como lo prevé el respeto al desarrollo emocional armónico del niño
Revitalizing tactical urban parks (TUPs) through environmental monitoring and participatory approaches for urban overheating mitigation
No full textThe 6th assessment report by IPCC underscores the necessity to switch from immediate to timely actions to foster (urban) climate change adaptation and mitigation. Green areas such as tactical urban parks could represent a strategic asset towards healthier and more sustainable cities and societies. Specifically studied greenery may indeed improve local microclimate and air quality conditions, supporting the socio-ecological resilience of cities while enhancing social interactions.
Using a multidisciplinary approach, this study aims to evaluate the environmental quality and local community needs of a neighbourhood located near the historic centre of Perugia (Italy) to provide guidelines for its requalification, especially for outdoor spaces. To achieve this goal, the study conducted dedicated environmental monitoring, demonstrating the massive thermal behavior differences (by about 5K in summer) within the same urban area all over the year, and carried out surveys campaigns focusing on outdoor perceptions and needs reported by the local community. The results confirm that local residents mainly use the area as a thoroughfare to access established activities by car (63% of respondants), leading to high vehicular traffic and pollutants emissions during peak hours, with PM10 concentration peaks reaching 55 μg/m3 and 180 μg/m3 close to the parking lot in winter and spring, respectively. An effective intervention was recognized in the introduction of furniture in the area, creating attractive places to spend the lunch break, enabling people to enjoy the outdoors and maximize thermal comfort benefits. Moreover, reducing vehicular traffic and fostering slow mobility also demonstrated to be attractive measures to improve comfort, health and well-being and reduce negative consequences on air quality
Analytical study of FRP debonding in a real-scale concrete strengthened beam
No full textThe exploitation of the mechanical properties of fiber-reinforced polymers (FRP) externally bonded to concrete members is limited
by the occurrence of debonding. Single- and double-lap shear tests were performed to study the debonding process. However, the
results of these tests fail to describe the debonding process when multiple substrate cracks occur, as in the case of reinforced
concrete beams strengthened in flexure. In this paper, an analytical model is proposed to describe the load response of a concrete
beam strengthened in flexure with an externally bonded FRP composite. The profiles of the FRP-concrete slip, FRP axial force,
and cross-section rotation, the evolution of the cracking process, and the failure mode may be obtained by this model. The results
of the model shed light on the debonding process in FRP-strengthened beams and may be used to investigate the relationship
between the bond capacity of FRP-concrete interfaces with a single crack and that observed in real-scale strengthened beams
In tema di costituzione del pegno e di altri vincoli sulla quota di srl
No full textL'indagine ha per oggetto il regime di pubblicità del pegno sulla quota di srl e trae spunto da una pronuncia della Cassazione che ne afferma la natura costitutiva. Oltre alla valenza da attribuire all'iscrizione del pegno nel registro delle imprese, vengono approfondite le questioni dell'efficacia del trasferimento della partecipazione nei confronti della società (art. 2470 c.1 Cod. Civ.) della natura giuridica della quota di srl e della suscettibilità di quest'ultima di essere oggetto di fondo patrimoniale e vincolo di destinazione ex art. 2645-ter Cod. Civ