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We don’t fire! Family firms and employment change during the COVID-19 pandemic
(Emerald Publishing, 2024) Cano Rubio, Mirian Montserrat; Barroso Martínez, Ascensión; Sanguino Galván, Ramón; Valentino, Alfredo; Calabrò, Andrea; Basco, Rodrigo; Universidad de Extremadura. Departamento de Dirección de Empresas y Sociología; Universidad de León; Universidad de Granada; Universidad Complutense de Madrid
Purpose – By investigating the reactions of family businesses to COVID-19 pandemic this article aims to explaining how family firms are capable to preserve employment during hardship. Design/methodology/approach – Stemming from resource-based-view, we theorise that familiness is not directly associated with new hiring but instead fully mediated by pivoting strategic decisions (the propensity to transform the business). Findings – Our findings show that familiness triggers pivoting strategic decisions and consequently increases the likelihood of new hiring. Additionally, we found that the involvement of multiple generations strengthens this relationship. Practical implications – Family firms must consolidate their family human and social resources (familiness) and assure the presence of multiple generations in the firm because they can leverage their entrepreneurial disposition and increase the need to preserve employment and new hires during crises. Originality/value – The main contribution lies in the explanation of the mechanisms that family firms deploy to overcome a crisis and thus explains why some family firms are more resilient than others in relation to firm’s employment during hardship.
Win, draw, or lose? Global positioning system based variables´ effect on the match outcome: a full season study on an Iranian professional soccer team
(MDPI, 2021) Nobari, Hadi; Banoocy, Norbert Keshih; Oliveira, Rafael Franco Soares; Pérez Gómez, Jorge; Universidad de Extremadura. Departamento de Didáctica de la Expresión Musical, Plástica y Corporal; Universidad de Granada
; Universidad de Extremadura. Grupo de Investigación Health, Economy, Motricity and Education (HEME); University of Isfahan. Iran
; Edith Cowan University. Australia; Instituto Politécnico de Santarém. Portugal
; Centro de Investigação de Desporto, Saúde e Desenvolvimento Humano (CIDESD).Portugal
The aim of the study was to determine the between‐match and between‐halves match variability of various Global Positioning System (GPS) variables and metabolic power average (MPA) in competitions, based on the match results obtained by professional soccer players over a full season. Observations on individual match performance measures were undertaken on thirteen outfield players competing in the Iranian Premier League. The measures selected for analysis included total duration, accelerations in zones (AccZ1, 2, and 3), decelerations in zones (DecZ1, 2, and 3), and MPA collected by the Wearable Inertial Measurement Unit (WIMU). The GPS manufacturer set the thresholds for the variables analyzed as follows: AccZ1 (<2 m.s⁻²); AccZ2 (2 to 4 m.s⁻²); AccZ3 (>4 m.s⁻²); DecZ1 (<−2 m.s⁻²); DecZ2 (−2 to −4 m.s⁻²); DecZ3 (>−4 m.s⁻²). The results revealed significant differences between wins and draws for the duration of the match and draws compared to wins for the first‐ half duration (p ≤ 0.05; ES = 0.36 [−0.43,1.12]), (p ≤ 0.05; ES = −7.0 [−8.78, −4.78], respectively. There were significant differences on AccZ1 during the first‐half between draws and defeats (p ≤ 0.05; ES = −0.43 [−1.32,0.46]), for AccZ3 in the second‐half between draws and defeats (p ≤ 0.05; ES = 1.37 [0.48,2.25]). In addition, there were significant differences between wins and draws (p ≤ 0.05; ES = 0.22 [−0.62,1.10]), and wins and defeats for MPA in the firsthalf (p ≤ 0.05; ES = 0.34 [−0.65,1.22]). MPA showed further differences between draws and defeats in the second‐ half (p ≤ 0.05; ES = 0.57 [−0.22,1.35]). Descriptive analysis revealed differences between the first and second half for wins in AccZ2 (p = 0.005), DecZ2 (p = 0.029), and MPA (p = 0.048). In addition, draws showed significant differences between the first and second half in duration, AccZ1, AccZ2, and DecZ2 (p = 0.008), (p = 0.017), (p = 0.040), and (p = 0.037) respectively. Defeats showed differences between the first and second half in AccZ1, AccZ3, and MPA (p = 0.001), (p = 0.018), and (p = 0.003) respectively. In summary, the study reveals large variations between the match duration, accelerometer variables, and MPA both within and between matches. Regardless of the match outcome, the first half seems to produce greater outputs. The results should be considered when performing a half‐time re‐warm‐up, as this may be an additional factor influencing the drop in the intensity markers in the second half in conjunction with factors such as fatigue, pacing strategies, and other contextual variables that may influence the results.
Design and Experimental Characterization of HTS-Tape Solenoidal Magnetic Screens for the Design of IR-SFCL Magnetic Structure
(IEEE, 2025) Rivera Vega, María Belén; Álvarez García, Alfredo; Pérez Caballero, Belén María; Suárez Marcelo, María Pilar; Universidad de Extremadura. Departamento de Ingeniería Eléctrica, Electrónica y Automática; Universidad de Extremadura. Departamento de Física Aplicada
The continuous evolution of electrical distribution systems—driven by the integration of renewable energy sources and decentralized generation—poses new challenges for grid protection. Superconducting Fault Current Limiters (SFCLs) have emerged as efficient, low-impact solutions capable of limiting fault currents without interfering with normal system operation. Among these, the Inductive-Resistive (IR-SFCL) architecture offers notable advantages in robustness and adaptability. However, previous prototypes developed by the research group revealed two critical limitations: the low contribution of the resistive stage in fault current limitation, and the fragility of the superconducting magnetic shields used in the inductive stage, traditionally made of rigid and costly bulk high-temperature superconductors (HTS) materials. This work presents a redesigned IR-SFCL that addresses both issues. The resistive stage has been optimized by increasing the active length of HTS tape exposed to the magnetic field, enabled by a new ferromagnetic core design. In parallel, the inductive stage incorporates novel solenoidal magnetic shields built from commercial HTS tape, offering improved mechanical flexibility and enhanced performance under thermal cycling. Experimental shielding tests were conducted to validate the proposed approach and to extract key parameters for device design. Results confirm the effectiveness and reliability of the new solenoidal shields and introduce a new design variable: the number of HTS tape layers, which directly influences the current-limiting capacity of the IR-SFCL.
A specific reconditioning training program implemented 12 months after ACL surgery improves lower-limb jump variables in amateur soccer players
(Frontiers Media, 2025) Jiménez Rubio, Sergio; García Calvo, Tomás; Martínez Aranda, Luis Manuel; Raya González, Javier; Universidad de Extremadura. Departamento de Didáctica de la Expresión Musical, Plástica y Corporal; Universidad Rey Juan Carlos
; Universidad Pablo de Olavide; Universidad de Córdoba
Introduction Soccer players are frequently exposed to high physical demands, which increase their risk of injury, especially anterior cruciate ligament (ACL) ruptures. Despite completing standard rehabilitation protocols, many athletes show persistent functional deficits one year after surgery. This study aimed to assess the impact of a 12-week reconditioning training program, focusing on adjacent joint mobility, neuromuscular control, plyometrics, stability-landing exercises, and strength production, of amateur soccer players 12 months after undergoing anterior cruciate ligament (ACL) surgery.
Methods: Twenty-five Spanish male amateur soccer players (age = 21.2 ± 2.4 years) participated voluntarily. All participants followed similar return-to-play guidelines and were randomly assigned to either the control group (CG, n = 13) or the experimental group (EG, n = 12). Soccer players in the EG underwent the 12-week training program (ACLrPRO), and both groups completed jump battery tests before and after the intervention period.
Results and discussion: The results showed improvements in all analyzed variables for the EG, except for the time to stabilization during the single-leg land and hold test for their non-injured leg, where the CG showed better results. Moreover, players in the CG exhibited a decline in performance related to their non-injured leg across all performed tests. The EG also demonstrated lower absence days during the experimental period compared to the CG. These findings underscore the significance of implementing a targeted neuromuscular training program for soccer players recovering from an ACL rupture, especially in enhancing performance and reducing absence days after their return to competition.
A new approach to minimize the economic cost of the deck in concrete slab bridges by means of metaheuristics
(Techno Press, 2024) Torrecilla Pinero, Jesús Ángel; Gómez Pulido, Juan Antonio; Cortés Toro, Enrique; Universidad de Extremadura. Departamento de Construcción; Universidad de Extremadura. Departamento de Tecnología de los Computadores y de las Comunicaciones; Universidad de Playa Ancha. Chile
Slab bridge is a structural type with costs similar to those of precast girder bridges. The optimization of their design variables can be a competitive aspect when opting for this type of construction. In this paper, the optimization of the economic cost of the concrete slab deck is considered, where the many functions involved in the design of the structure are taken here as constraints of the optimization problem. On the other hand, the price of the deck can be approached as a linear combination of the quantity of the different materials that are part of it, being the coefficients of that combination the unit prices of each material. In order to find an optimal combination of the design parameters to minimize the deck price, avoiding approximate or manual calculation methods, the use of single-objective optimization metaheuristics is proposed. Four representative algorithms were applied: genetic algorithm, pattern search, variable neighbourhood search, and vapour-liquid equilibrium. The optimization problem was approached as a black box containing all the formulations, relationships, and constraints involved in calculating the cost of the deck. After extensive calculations and comparisons, it is concluded that variable neighbourhood search provide better mean results with minimal data dispersion than the other metaheuristics, and a more stable behavior in the search for an optimal solution, avoiding falling into local solutions.