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Exploring Job Satisfaction in the Platform Economy: A Multidimensional Study of Mobile Digital Platform Workers in Chile
(Sustainability (Switzerland), Volume 17, Issue 2January 2025 Article number 532, 2025) Lay-Raby, Nelson; Cea-Gonzalez, Pablo; de la Fuente-Mella, Hanns; Ríos-Vásquez, Gonzalo c
This study examines job satisfaction among mobile digital platform workers in Chile, addressing the gap in understanding the interplay between autonomy, social support, and technology in the platform economy. It explores how these factors shape job satisfaction through the following research question: How do autonomy, social support, and technological factors influence job satisfaction in the platform economy? Using a quantitative methodology, 398 platform workers from three Chilean regions participated in a survey, with data analyzed via logistic regression models to evaluate the impact of sociodemographic and psychological variables. The findings highlight that autonomy and social support significantly enhance job satisfaction, while technological usability and transformation are pivotal for positive work experiences. The study concludes that fostering worker autonomy, robust support systems, and user-friendly technologies is critical for improving job satisfaction in the gig economy. These insights contribute to the academic literature and inform strategies for policymakers and platform operators, emphasizing the need for tailored approaches to enhance worker well-being and organizational outcomes. © 2025 by the authors
Measuring Complexity in Manufacturing: Integrating Entropic Methods, Programming and Simulation
(Entropy, Volume 27, Issue 11 January 2025 Article number 50, 2025) Herrera-Vidal, Germán; Coronado-Hernández, Jairo; Derpich-Contreras, Ivan; Martínez Paredes, Breezy P.; Gatica, Gustavo
This research addresses complexity in manufacturing systems from an entropic perspective for production improvement. The main objective is to develop and validate a methodology that develops an entropic metric of complexity in an integral way in production environments, through simulation and programming techniques. The methodological proposal is composed of six stages: (i) Case study, (ii) Hypothesis formulation, (iii) Discrete event simulation, (iv) Measurement of entropic complexity by applying Shannon’s information theory, (v) Entropy analysis, and (vi) Statistical analysis by ANOVA. The results confirm that factors such as production sequence and product volume significantly influence the structural complexity of the workstations, with station A being less complex (0.4154 to 0.9913 bits) compared to stations B and C, which reached up to 2.2084 bits. This analysis has shown that optimizing production scheduling can reduce bottlenecks and improve system efficiency. Furthermore, the developed methodology, validated in a case study of the metalworking sector, provides a quantitative framework that combines discrete event simulation and robust statistical analysis, offering an effective tool to anticipate and manage complexity in production. In synthesis, this research presents an innovative methodology to measure static and dynamic complexity in manufacturing systems, with practical application to improve efficiency and competitiveness in the industrial sector. © 2025 by the authors
Stable Reusability of Nanocellulose Aerogels with Amino Group Modification in Adsorption/Desorption Cycles for CO2 Capture
(Materials, Volume 18, Issue 2January 2025 Article number 243, 2025) Valdebenito, Fabiola; Albornoz, Camila; Rivera, Valentina; Elgueta, Elizabeth; Nisar, Muhammad; Lira, Sebastian; Valerio, Oscar; Narváez, Ana; Quezada, Carolina; Muñoz, Robinson; Azócar, Laura; Sandoval, Franco
This study evaluated the stability and reusability of amino-functionalized nanocellulose aerogels as CO2-adsorbent materials. The modified aerogels, synthesized via a controlled silylation using N-[3-(trimethoxysilyl) propyl] ethylenediamine (DAMO), demonstrated excellent thermal stability up to 250 °C (TGA) and efficient CO2 adsorption through chemisorption, which was the main adsorption mechanism. The performance of the aerogels was assessed using both adsorption isotherms and the decay pressure technique, revealing that CO2 adsorption capacity increased with higher amino group loading (4.62, 9.24, and 13.87 mmol of DAMO). At 298 K and 4 bar, CO2 adsorption capacity increased proportionally with the amino group concentration, reaching values of 3.17, 5.98, and 7.86 mmol of CO2 g−1 polymer, respectively. Furthermore, over 20 adsorption/desorption cycles, the aerogels maintained 95% CO2 desorption at ambient temperature, indicating their potential for industrial use. These findings highlight the aerogels suitability as stable, reusable materials for large scale CO2 capture and storage technologies. © 2025 by the authors.
University students' psychological distress during the COVID-19 pandemic: A structural equation model of the role of resource loss and gain
(John Wiley and Sons Inc, 2023-09) Kelada, Lauren; Schiff, Miriam; Gilbar, Ohad; Pat-Horenczyk, Ruth; Benbenishty, Rami
Using the Conservation of Resources (COR) theory, we aimed to determine whether university students' loss and gain in resources during the pandemic mediated the relationships between COVID-19 exposure/concern and depression and anxiety. In 2021, 7013 Israeli university students completed online questionnaires. We assessed the data using structural equation modeling. We found that resource loss was directly related to concern (β = 0.32, p < 0.001). Depression and anxiety were both directly related to loss of resources (depression: β = 0.75, p < 0.001; anxiety: β = 0.69, p < 0.001) and concern (depression: β = 0.06, p < 0.001; anxiety: β = 0.12, p < 0.001). Resource loss had an indirect effect on the relationships between concern and depression (β = 0.24, p < 0.001) and concern and anxiety (β = 0.22, p < 0.001). COR theory may help explain the mechanisms behind university students' mental health during the pandemic and provides a framework to better understand preparedness for future pandemics, epidemics, and major disasters. Governments and universities should help prevent the loss of resources during future emergencies. © 2023 The Authors. Journal of Community Psychology published by Wiley Periodicals LLC.
Pain Decrement Using Radiofrequency Therapy After Knee Platelet-Rich Plasma Injections Within First 72 h in Active Populations with Patellar Chondropathy
(Journal of Clinical Medicine, Volume 14, Issue 2January 2025 Article number 544, 2025) Abat, Ferran; Torras, Jordi; Garcia, Alba; Jordán, Enrique; Roby, Matías; Yáñez, Roberto; De la Fuente, Carlos
Objective: To determine whether 448 kHz capacitive-resistive monopolar radiofrequency (CRMR) after platelet-rich-plasma (PRP) injections can further reduce pain sensation within the first 72 h in an active population with patellar chondropathy. Methods: One-hundred fifty-three active patients with patellar chondropathy grade II-III were followed for three days after PRP injections with and without CRMR under a control–placebo study. They were clinically evaluated for pain sensation using a visual analog scale ranging from zero (no pain sensation) to ten (highest pain sensation). Pain sensation was described using medians and analyzed through the Friedman and Conover test for within-group comparison (pre-intervention, and 24, 48, and 72 h post-intervention) and the Mann–Whitney test for between-group comparisons (Intervention vs. Placebo) with α = 5% and 1−β = 80%. Results: The placebo group showed statistical significance between pre-intervention and 24 h (Δ = −2.0 pts, p < 0.001), baseline and 48 h (Δ = −2.0 pts, p < 0.001), baseline and 72 h (Δ = −3.0 pts, p < 0.001), 24 h and 48 h (Δ = 0.0 pts, p < 0.016), and 24 h and 72 h (Δ = −1.0 pts, p < 0.001). The radiofrequency group showed statistical significance between baseline and 24 h (Δ = −7.0 pts, p < 0.001), baseline and 48 h (Δ = −7.0 pts, p < 0.001), baseline and 72 h (Δ = −8.0 pts, p < 0.001), 24 h and 72 h (Δ = −1.0 pts, p < 0.001), and 48 h and 72 h (Δ = −1.0 pts, p < 0.001). The placebo and radiofrequency groups were significantly different at 24 h (Δ = 4.0 pts, p < 0.001), 48 h (Δ = 4.0 pts, p < 0.001), and 72 h (Δ = 4.0 pts, p < 0.001). Conclusions: CRMR therapy administered after knee intra-articular injections of PRP within the first 72 h in active populations with patellar chondropathy reduces pain sensation with a median difference of 8.0 pts compared to baseline and 4.0 pts compared to placebo group. © 2025 by the authors.