Search Results (343)

The rapid proliferation of Internet of Things (IoT) devices in cloud-based e-learning platforms has posed significant security risks, particularly in protecting learner information, authentication of devices, and safe communication in the highly heterogeneous learning settings. Current cryptographic solutions are largely based on classical public-key infrastructure (PKI) protocols such as RSA and ECC, which will become vulnerable with the advent of large-scale quantum computers capable of executing Shor’s algorithm. In addition, traditional perimeter-based security models are inadequate for handling the dynamics, scattered, and resource-limited characteristics of IoT-enabled educational systems. As a solution to these problems, this paper introduces ZeroTrustEdu, a scalable zero-trust cryptographic solution that combines lightweight post-quantum key management with adaptive trust scoring of cloud-connected IoT e-learning infrastructure. The proposed framework makes three fundamental contributions namely: (1) a hierarchical zero-trust security model with no implicit trust, operating across device, edge, and cloud layers; (2) a lightweight key distribution protocol based on the Module-Lattice Key Encapsulation Mechanism (ML-KEM) compliant with NIST FIPS 203 standards and (3) an adaptive behavioral trust scoring engine that dynamically adjusts device and user trust levels based on real-time interaction analytics. The architecture is evaluated using extensive NS-3 network simulations with up to 100,000 concurrent IoT nodes with formal security analysis under Chosen Plaintext Attack (CPA) and Chosen Ciphertext Attack (CCA) threat models. Comparative evaluation against RSA-2048, ECC-P256, and AES-256 baselines demonstrates that, ZeroTrustEdu delivers a 62% ± 3% (95% CI, 10 independent runs) reduction in ML-KEM encapsulation latency (12.8 ms for key encapsulation/decapsulation, contributing to a complete device authentication latency of 47.3 ms including ML-DSA signature operations), 45% reduced communication overheads, and 38% reduction in energy consumption on ARM Cortex-M4 constrained devices compared to RSA-2048 and achieves provable post-quantum security reducible to the hardness of the Module Learning With Errors (MLWE) problem. These findings demonstrate that the proposed architecture provides a viable, scalable, and quantum-resilient security solution for next-generation IoT-enabled e-learning environments. The cryptographic security of ZeroTrustEdu is guaranteed at the primitive level through NIST-standardized ML-KEM (FIPS 203) and ML-DSA (FIPS 204), with IND-CCA2 and EUF-CMA security formally proven in the respective standards; full protocol-level formal verification using automated theorem provers (ProVerif, Tamarin) is identified as valuable future work to rule out protocol-composition vulnerabilities beyond primitive-level guarantees. Full article

Microplastics (MPs) are synthetic polymer particles that are generally less than 5 mm in size and have attracted heightened scrutiny due to their pervasive presence in the environment, along with their toxicological significance. Several research investigations documented its presence in humans as a profound finding in biological tissues and fluids crossing barriers, leading to oxidative and inflammatory pathways alterations associated with blood, placenta, cardiovascular, pulmonary, nephrotic, other systems, and their disorders. Given the ubiquitous utilization of microplastics across diverse sectors, it is imperative to systematically investigate and elucidate their potential toxicological effects on biological systems through rigorous and mechanistically informed research. This review will also provide the synthesis of recent mechanistic data on the toxicity that can be caused by MPs and will determine key gaps that impede efficient human health risk evaluation. A structured literature search was conducted via PubMed, Web of Science, and Scopus databases, mostly from the studies published between 2010 and 2026. The studies of exposure characteristics and biological effects were analyzed in vitro, in vivo, and in human biomonitoring, and the primary focus of the interventions includes oxidative stress, inflammation, apoptosis, hepatotoxicity, and metabolic malfunction. MPs possess various physicochemical properties, such as a low particle size, various shapes, surface area, polymer composition, and the presence of sorbed or intrinsic additives. When MPs are taken up by cells, they can induce oxidative stress via increasing ROS, eventually leading to high lipid peroxidation, mitochondrial malfunction, DNA fragmentation, and eventually cell death. MPs also cause pro-inflammatory cytokine responses, including TNF-α, IL-1β, and IL-6, altering the immune system and cell profile, leading to systemic inflammation. In aquatic and terrestrial organisms, these microplastics have a harmful impact on growth, reproduction, and behavior in a time- and dose-dependent manner. Under conditions of controlled exposure, the organ-specific toxicities that have been reported include hepatic, renal, neurological, reproductive, and cardiovascular systems. Although the fields of mechanistic knowledge are growing, there is still a substantial amount of uncertainty; there is a lack of characterization of the long-term effects of low-dose chronic exposure, the kinetics of bioaccumulation, biodegradation potential, and transgenerational effects. In addition, there are no standardized procedures for the characterization of MPs, nor the reporting of the distribution of size or exposure measurements, which limits the comparability of cross-studies and makes it difficult to assess risks quantitatively. The dynamics of interactions of MPs between co-adsorbed contaminants like heavy metals, polycyclic aromatic hydrocarbons, and endocrine-disrupting chemicals are also yet to be explored. Although all evidence available to date does indicate biologically plausible mechanisms of MP-induced toxicity, integrated research employing standardized analytical protocols, an environmentally relevant exposure model, and human epidemiological data is required to ensure that laboratory results are translated into evidence-based public health and regulatory actions. This review offers an in-depth analysis of the existing molecular understanding of MP-induced toxicity, demonstrates organism-level impacts throughout species, and establishes vital fields for future studies. In order to develop competent guidelines to minimize MP exposure and its adverse health effects, it is crucial to cover these gaps via research that incorporates toxicology and environmental science. Full article

This study experimentally evaluates the thermal performance of a compact parabolic trough solar collector (PTSC) operating under actual solar conditions in Chachapoyas, a high-Andean city in northern Peru characterized by frequent cloud cover and variable irradiance. Despite the growing interest in solar thermal systems, few studies have assessed PTC behavior under high-altitude, diffuse radiation conditions typical of Andean regions. The PTSC, aligned along the north–south axis and equipped with a manual solar tracking system, was monitored for 30 consecutive days. Solar irradiance, ambient temperature, and water inlet/outlet temperatures were recorded at 30 min intervals using a DAVIS Vantage Pro Plus weather station and infrared thermometers (±0.5 °C accuracy). Thermal efficiency was determined from the ratio of useful heat gain to incident solar energy, based on instantaneous irradiance data. Results showed peak irradiance values of 1000 W m⁻² and maximum outlet water temperatures of 85 °C, achieving an average efficiency of 68 ± 2.5%. The collector maintained stable operation even under fluctuating radiation, confirming its suitability for domestic hot-water and low-temperature industrial applications. These findings provide the first experimental evidence of efficient solar-thermal conversion in cloudy highland environments of Peru, supporting the deployment of decentralized renewable energy systems in the Andean region. Full article

The SensaSea System is a responsive multisensory environment, specifically, a room-sized interactive installation that incorporates wearable devices, interactive visual floor projections and auditory and tactile modalities. SensaSea is designed as a physical environment for embodied interaction and free play suitable for multiple players; the system uses social proximity as the primary mechanism. Our objective is to promote active peer interaction and social connectedness among elementary school children through sensory-guided approaches which include digitized and projected interactive sea creatures. The multi-modal system also features an interactive soundscape and innovative real-time haptic feedback. We conducted eight group user studies (24 children in total). Our usability and feasibility tests demonstrated that the system results in positive emotions and elicits multiple pro-social behaviors. Full article

The renewable energy transition has become one of the vital pathways for approaching climate change and promoting sustainability. The success of this transition, however, does not depend only on technical and economic considerations, but is mainly influenced by social and institutional factors that form acceptance and support. This study aims at measuring the contribution of social capital, the awareness of the energy transition, and the institutional context in increasing the level of public support for the energy transition among Sultan Qaboos University students. It adopts a cross-sectional quantitative approach, and data are collected through a multi-section questionnaire from a sample of 437 male and female students from different colleges, majors, and academic years at Sultan Qaboos University. These tools of the study measure the dimensions of social capital: trust, social networks, bridging, institutional linking, and student participation. They also evaluate objective knowledge and self-perceived awareness of the renewable energy transition, in addition to components of the institutional context within the university: the sustainability climate on campus, opportunities for participation, and trust in governance/procedural justice. The indicators of internal consistency (reliability) also show significant values: the Cronbach’s Alpha coefficients range approximately between 0.715 and 0.893 for the independent variables and reach 0.864 for the dependent variable. The results of this study show that most of the students fall within the high level of support (77.3%), with no statistically significant differences based on gender, college type, academic year, or previous volunteering experience. The ordinal logistic regression results indicate that the campus sustainability climate is the strongest factor influencing higher levels of support followed by trust in governance/procedural justice and general trust (TR). The bridging dimension (BB) does not have a significant independent influence after accounting for the other variables. This study emphasizes that increasing support for the renewable energy transition in the university environment requires strengthening an institutional climate which supports sustainability, promoting fair and transparent governance, expanding participation opportunities, and investing in building trust and strengthening institutional connections to encourage pro-sustainability behaviors. Full article

Objective: This metasynthesis analyzes the current evidence on the perceptions of sexism among video game players (men and women) and the video game industry. Methods: The databases Scopus and ProQuest were used to select 15 qualitative studies in a final analysis. The analysis used the reciprocal translation technique to analyze and interpret the data. Results: Three primary themes emerged: normalized violence in gamer environments (n = 13), strategies to confront sexism/gender harassment (n = 10), and internal ambivalence and tension (n = 10). The results show that female videogame players experience daily hostility due to the fact of being women in an environment of male dominance. This leads to recurring confrontations, which can result in female video game players being questioned in terms of identity and behavior by both themselves and the community. Conclusions: This metasynthesis suggests that sexism in online video game environments is not an isolated phenomenon and directly affects the experience of female video game players. Furthermore, it highlights the importance of further exploring the perceptions and experiences of different groups within gamer communities, in order to make progress towards a more egalitarian and diverse culture. Full article

The development of effective antioxidants has evolved from descriptive analysis toward a precise, mechanism-driven discipline targeting the molecular “redox switch”. This review synthesizes the critical advances reported since 2021, focusing on how the interplay between polyphenolic architecture and electronic descriptors, such as bond dissociation enthalpy and ionization potential, governs radical scavenging through the HAT, SET, and SPLET pathways. We evaluate the dual influence of metal coordination, where interactions can either enhance antioxidant stability through σ bond polarization or trigger pro-oxidant transitions via ligand-to-metal charge transfer. Central to this progress is the integration of computational models (DFT, QSAR) with advanced synchrotron methodologies (XAS, STXM, SR-FTIR, and SAXS), which provide element-specific validation of antioxidant behavior and subcellular oxidative mapping within complex matrices. Furthermore, we highlight how these molecular insights inform formulation engineering, specifically the development of organic nanocarriers and hybrid delivery systems, such as metal–phenolic networks, that shield therapeutic cargo from degradation and govern release in challenging physiological environments. These fundamental studies provide an essential physicochemical basis for medicine by enabling a better understanding and the rational design of antioxidant drugs, dietary supplements, and antioxidant strategies. Full article

Background: This study aimed to investigate the potential biomechanical implications of biologically motivated modulation scenarios—Resolvin E1 (RvE1), Resolvin D1 (RvD1) and carvacrol—in the context of rotator cuff tears by using a reduced finite element (FE) modeling approach. The primary objective was to compare stress distribution and deformation behavior at the tendon–bone interface under standardized loading scenarios. Materials and Methods: A three-dimensional reduced FE model of the shoulder, including the scapula and proximal humerus, was constructed based on computed tomography data. A rotator cuff tear was represented at the tendon footprint on the greater tuberosity. Standardized boundary scenarios and loading vectors were applied. Three conceptual biological modulation scenarios (RvE1, RvD1, and carvacrol) were evaluated and compared with a baseline model representing a rotator cuff tear under identical geometric, material, boundary, and loading scenarios, without any biologically motivated modulation. Von Mises stress distribution at the greater tuberosity and tendon footprint, as well as maximum displacement of the proximal humerus, were analyzed descriptively and comparatively. Results: Compared with baseline scenarios, the RvE1 and RvD1 scenarios demonstrated reduced peak von Mises stress at the tendon footprint and lower overall humeral displacement. Peak footprint stress decreased from 10.8 MPa in the baseline model to 7.9 MPa (−26.9%) in the RvE1 scenario and to 8.6 MPa (−20.4%) in the RvD1 scenario. Similarly, maximum humeral displacement was reduced from 4.6 mm at baseline to 3.4 mm (−26.1%) with RvE1 and to 3.9 mm (−15.2%) with RvD1. In contrast, the carvacrol scenario exhibited increased localized stress concentration at the tendon footprint (12.4 MPa; +14.8%) and greater maximum displacement (5.8 mm; +26.1%). Conclusions: The findings suggested that modulation scenarios associated with specialized pro-resolving mediators (SPMs) were aligned with a more favorable mechanical environment at the tendon–bone interface compared with baseline scenarios, whereas the carvacrol scenario demonstrated less favorable biomechanical behavior under the modeled assumptions. Although the biological effects were represented conceptually and the results were interpreted as relative trends, this study highlighted the potential importance of resolution-oriented pathways in influencing tendon-to-bone biomechanics and supported further experimental and translational investigations in rotator cuff repair. Full article

This study examines whether environmentally specific authentic leadership promotes organizational citizenship behavior for the environment and contributes to organizational environmental sustainability. The study employed a three-wave survey design to collect data from 262 full-time employees in Chinese organizations, ensuring the results are both representative and reliable. The results show that environmentally specific authentic leadership is positively associated with employees’ organizational citizenship behavior for the environment. Environmentally specific authentic leadership is also positively related to environmental commitment, highlighting the importance of leadership for sustainable workplace behaviors. Additionally, the study found that environmental commitment partially mediates the relationship between environmentally specific authentic leadership and organizational citizenship behavior, underscoring the vital role of environmental commitment in fostering pro-environmental actions. Taken together, these findings clarify how environmentally specific authentic leadership influences organizational citizenship behavior for the environment through environmental commitment. Practically, the results suggest that organizations can encourage organizational citizenship behavior for the environment by developing leaders’ environmentally specific authentic leadership and implementing green human resource management practices. Consequently, the study offers actionable guidance for achieving environmental sustainability. Full article

Sustainable business management in the food sector entails the systematic integration of social, environmental, and economic considerations into organizational decision-making, which has direct implications for food safety assurance systems. This study sought to evaluate how the maturity of an organization’s safety culture influences employees’ pro-quality and food-safety-related behaviors. A complementary objective was to examine employees’ understanding of pro-quality awareness in the context of the principles, goals, and operational procedures associated with sustainable management. The research was carried out in three food industry enterprises located in the Greater Poland region. The methodological framework consisted of internal audits assessing compliance with food safety and quality management standards, combined with a structured questionnaire survey. A total of 169 employees from various operational and administrative departments participated. The results indicate that employees’ professional qualifications and organizational roles significantly affect their awareness of how individual actions contribute to food safety and product quality outcomes. Moreover, the implementation of a sustainable, systems-oriented management approach supported a more comprehensive understanding of food production processes where employees recognize their impacts on public health, the socio-economic environment, natural ecosystems, and future generations. At the same time, this approach underscores the interdependence between employee well-being, organizational performance, and consumer protection. Full article

Contemporary environmental challenges necessitate the adoption of active learning methods within educational frameworks, particularly those that foster the development of environmental awareness among young people. The 2030 Agenda underscores the importance of project-based learning as a strategy for building the competencies required to achieve sustainable development goals. In this context, the attitudes and behavior of young people towards the environment serve as critical indicators of future social transformations within the sphere of sustainable development. The aim of this research was to determine whether project-based learning in geography, as opposed to traditional teaching methods, exerts a more pronounced influence on the formation of environmental values, attitudes, and pro-environmental behavior among students in their final year of primary school. The research was conducted using a convenience sample (n = 255) and employed pedagogical experimental surveys with parallel group designs. In the experimental group, project-based learning was implemented, whereas the control group continued with traditional teaching approaches. To assess environmental values and attitudes, the research employed a scale grounded in the EAATE framework, and pro-environmental behavior was evaluated using a measurement scale derived from the PEB and GEB scales. The obtained results are attributed to the influence of project-based learning. Although they cannot be generalized to the entire population, they indicate the potential of project-based learning as a more effective strategy in environmental education. Furthermore, these findings provide opportunities for further professional and scientific research in this area. Full article

Concrete structures suffering from Mg²⁺ environments may suffer severe damage, which mainly has something to do with the coupled effect among Cl⁻, SO₄²⁻, and Mg²⁺. Based on a systematic review of Web of Science and Scopus database (2000–2025), we first summarized the migration behavior, reaction paths, and interaction mechanism of Cl⁻, SO₄²⁻, and Mg²⁺ in cementitious matrices. Secondly, from the perspective of Cl⁻ cyclic adsorption–desorption breaking the passivation film of steel bars, SO₄²⁻ generating expansion products leads to crack expansion, then Mg²⁺ decalcifies C-S-H and transforms into M-S-H; we analyzed the main damage mechanisms, respectively. In addition, under the coexistence conditions of three kinds of ions, the “fixation–substitution–redissolution” process and “crack–transport” coupling positive feedback mechanism further increase the development rate of damage. Then, some anti-corrosion measures, such as mineral admixtures, functional chemical admixtures, fiber reinforcements, surface coatings, and new binder systems, are summarized, and the pros and cons of different anti-corrosion technologies are compared and evaluated. Lastly, from two aspects of simulation prediction for the coupled corrosion damage mechanism and service life prediction, respectively, we have critically evaluated the advances and problems existing in the current research on the aspects of ion migration-reaction coupled models, multi-physics coupled frameworks, phase-field methods, etc. We found that there is still much work to be conducted in three respects: deepening mechanism understanding, improving prediction precision, and strengthening the connection between laboratory test results and actual projects, so as to provide theoretical basis and technical support for the durability design and anti-corrosion strategies of concrete in complex Mg²⁺ environments. Full article

As public attention to environmental issues grows, enterprises have begun implementing environment-centered business management. Achieving environmental sustainability requires the participation of all organizational members. This study was conducted in Chinese food manufacturing small and medium-sized enterprises located in Guangdong and Jiangsu provinces, China, and employed a three-wave, time-lagged survey design to collect and match data from team leaders and employees. Hierarchical linear modeling was used to test the cross-level hypotheses, and the indirect effect was assessed using Bayesian multilevel mediation analysis. Using cross-level data from both team leaders and team members, this study examines how green transformational leadership impacts employees’ pro-environmental behavior. In addition, this study examines the mediating role of employee value–action barriers and the moderating role of green brand image. The results indicate that (1) green transformational leadership positively influences employee pro-environmental behavior, (2) employee value–action barriers mediate the relationship between green transformational leadership and employee pro-environmental behavior, and (3) green brand image moderates both the correlation between green transformational leadership and employee pro-environmental behavior and the relationship between employee value–action barriers and employee pro-environmental behavior. These findings provide empirical support for the application of social learning theory and offer managerial insights into how managers can more effectively enhance their employees’ pro-environmental behavior. Future research may further test the robustness and applicability of these relationships in other industries and in different regional and national contexts. Full article

Environmental Education (EE) is increasingly relevant in the current context of environmental crises, requiring approaches that integrate Human Ecology (HE) and Environmental Psychology (EP) due to understanding the interdependent relationship between ecological and human systems. This study emphasizes corporeity as a fundamental dimension for reconnecting humans with nature and fostering ecological awareness. The study aimed to develop and evaluate a transdisciplinary intervention project based on bodily experiences with children and adolescents in a Brazilian public school, aiming to improve their connectedness with nature and ecological values. A diagnostic survey was conducted with 103 students aged 10–13 years, including open questions, and two instruments: the Inclusion of Nature in Self (INS) and the Values for Pre-adolescents scale (EVP). The results indicated that one 5th-grade class, which presented the lowest self-transcendence mean (4.07), was selected for pedagogical interventions. In the second stage, 20 students participated in workshops held in public parks and a school green area, combining sensory awareness and playful activities. The findings suggest that these experiences stimulated pro-environmental attitudes, including group care for nature, protective behaviors, and positive emotions such as peace, happiness, and freedom. Despite the small sample size, the results highlight the importance of strengthening embodied experiences in natural environments, increasing frequency and intensity to support the development of ecological values and deeper connectedness with nature. Full article

Previous studies on innovative courses have found that information on the elements of sustainable tourism is still lacking. To fill this research gap, this study examined the concept of sustainable tourism by focusing on two innovative courses titled “Seminar on Sustainable Tourism” and “Management and administration of Ecotourism”. Thirteen graduate students taking one of these courses were recruited as respondents for this study. The Zaltman metaphor elicitation technique (ZMET) was used to analyze photographs taken by the respondents and illustrate how graduate school students perceive sustainable tourism. The ZMET surveys were conducted in the 3rd week and 9th week and between the 17th and 18th weeks to represent the first and second semester, respectively. The results of the analysis illustrated that sustainable tourism involves constructs related to the natural environment and caring for wildlife, environmental conservation, sociocultural sustainability, natural and cultural experiences, perspectives on the environment, and government and policy. Four consensus maps were developed regarding environmental concerns, responsible behaviors, learning experiences, and reflections on sustainable tourism. Finally, the author concluded that when graduate students develop ecotourism itineraries, increase their environmental awareness, gain relevant learning experience, and exhibit reflective engagement, they experience positive feelings that benefit their environmental awareness, environmental attitude, sensory emotions, and reflective engagement, ultimately leading to pro-environmental or ecotourism behaviors that may subsequently boost sustainable tourism practices. Full article