Artiles
Open Access
Article
17 April 2026Electrical and Thermal Performance of SiC Wide-Bandgap Power Devices: Influence of Package Configuration
Wide Bandgap (WBG) semiconductors, particularly Silicon Carbide (SiC), have become pivotal in advancing high-efficiency, high-power-density systems. Cascode configurations, combining a high-voltage SiC JFET with a low-voltage Si MOSFET, enable Normally-OFF operation while leveraging SiC’s superior switching and thermal properties. However, co-packaging these devices introduces critical design challenges related to parasitic inductance, thermal management, and reliability. This study investigates the impact of bonding configuration and die-attach material selection on dynamic and thermal performance in SiC-based modules. Double Pulse Test (DPT) results reveal that direct bonding provides a better tradeoff between switching losses and dynamic operation stability, mitigating VDS overshoot, gate oscillation, and EMI risk, thereby improving switching stability under system-level stress. Conversely, indirect bonding increases inductance, amplifying oscillations and dynamic stress during turn-off events. Thermal analysis demonstrates that while system-level cooling dominates Rthja, the adoption of sintered silver (Ag) as a die-attach material achieves ~20% reduction in Rthjc, lowering junction temperatures and enhancing reliability for high-power applications. These findings underscore the importance of interconnect design and attach material optimization in achieving robust, high-efficiency operation of wide-bandgap devices.
Open Access
Review
17 April 2026Optical Fiber Sensing Materials from a Green Chemistry Perspective: Principles, Applications, and a Sustainable Prospectus
Optical fiber sensing technology offers high sensitivity, electromagnetic immunity, and distributed sensing capabilities, with broad applications in environmental, biomedical, and industrial monitoring. However, its reliance on heavy-metal-doped glasses, rare-earth elements, and non-biodegradable polymers imposes significant environmental burdens across their lifecycle. This review establishes a systematic framework based on the Twelve Principles of Green Chemistry to assess and redesign optical fiber sensing materials, including silica, soft glass, and polymer matrices, as well as functional coatings, fluorescent probes, and plasmonic nanostructures. It highlights green alternatives such as sol-gel synthesis, bio-based polymers, carbon quantum dots, and biosynthesized nanoparticles. A multi-dimensional sustainability assessment, covering performance, environmental impact, economics, and social factors, identifies key challenges such as performance-environment trade-offs and scaling-up costs. Future pathways integrating AI-assisted design, additive manufacturing, modular systems, and policy support are proposed. The study argues that green attributes and high performance are synergistic, positioning green optical fiber sensing as essential for achieving circular economy goals and UN Sustainable Development Goals.
Open Access
Article
17 April 2026Between Cultural Expectations and Personal Choices: Marriage Attitudes of Central Asian Women
This qualitative study explores the evolving attitudes of marriage among Central Asian women living in the United Kingdom. Drawing on a social constructionist framework and employing reflexive thematic analysis, interviews with five single women from Central Asia reveal how migration, education, and exposure to new cultural environments shape their perceptions of marriage. Two overarching themes emerged from the data: the tension between cultural expectations and personal agency, and the negotiation of marriage as a choice shaped by lived experiences, gender norms, and structural constraints. These findings demonstrate a shift toward autonomy and critical reflection, whilst demonstrating a persistence of traditional pressures and patriarchal values. This study provides an in-depth appreciation of how gender, culture, and identity intersect in shaping marriage perceptions among diasporic youth and offers further insight that will inform future research and culturally informed support initiatives.
Open Access
Article
16 April 2026Barriers to Low-Carbon Transition: An Empirical Assessment of GHG Emissions and Mitigation Readiness in the Matsapha Industrial Area, Eswatini
Climate change mitigation in the manufacturing sector is crucial for reducing global greenhouse gas (GHG) emissions. In Eswatini, the industrial sector is the largest contributor to the national GHG inventory. This study provides a comprehensive assessment of the mitigation readiness of this sector through a unique multi-stakeholder approach, using the Matsapha Industrial Area as a case study. Through an extensive survey, between November 2024 and January 2025, of industry managers, achieving an exceptionally high response rate of 91% (n = 21), employees (n = 63), local residents (n = 385), and a key ministry, the study evaluated emission sources, mitigation measures, stakeholder awareness, and the policy framework. The findings reveal a critical awareness-action gap: while basic awareness of climate change is high, a significant limitation was identified where nearly half (48%) of the surveyed industries could not provide quantifiable annual energy use data, and strategic mitigation is limited to cost-saving efficiency measures. Critically, the study confirms a policy vacuum, with no regulations mandating GHG monitoring or mitigation for manufacturing. This governance gap is the primary barrier to decarbonization. The results underscore an urgent need for a sector-specific industrial climate policy with a mandatory Monitoring, Reporting, and Verification (MRV) framework, coupled with targeted capacity-building initiatives to translate awareness into accountable climate action.
Open Access
Review
16 April 2026The Chinese Genetic Traits in Atlantic Azores Archipelago and Its Ancient Anthropology Relationship with Sahara-Canary Islands Circle
Genetic studies in the Atlantic Azores Islands (1500 km far from Portugal) show that the modern population is composed of both northern and southern European populations. However, a significant Chinese input of HLA characteristic genes is noticed, possibly with people or genes that may have been left by Zheng-He very big crew which sailed seas from China in a long-lasting expedition (1421–1423 AD). This was concluded after Azorean HLA genetics comparison with HLA genes of worldwide populations by both neighbour joining and correspondence methodology. Also, the Machado- Joseph ataxia disease gene variant (ATXN3, Chr 14) is identical in China and the Azores, where this ataxia was discovered, and it has a high frequency. Moreover, the predisposing HLA-B*2707 gene variant to ankylosing spondylitis is the same in Azores and Far East Asian countries. This data may reflect a strong founder Chinese effect followed by isolation in Azores. In addition, “Carthaginian” coins were found in Corvo Is (Azores) of Spanish fabrication. This is contradictory to the official version that pre- Portuguese Azores had been virgin and inhabited. Also, Cart–ruts in Azores indicate a (Atlantic) common culture with Canary Islands and Mediterranean area. On the other hand, genetic studies on Canarians show that they present European, Iberian and Berber characteristics. A prehistoric lunisolar megalithic calendar is found: “Quesera” (Cheeseboard) of Zonzamas, pyramids similar to those found in nearby Western Sahara (90 km far from Canary Islands). In addition, lbero-Guanche rock scripts which can be transcripted with Iberian-Tartessian signary and are also found at Tim Missaw shelter (Sahara Desert, Algeria). Populated green Sahara area dissecation after 5000 years BC and subsequent people migration could be the origin of Canary Islands, Sahara and other Mediterranean culture traits. Thus, we have defined the Saharo-Canarian Circle as a genetic, anthropological, and prehistoric culture radiation area; it might have given raise to the Iberian-Tartessian signary and to other ancient lineal Mediterranean scripts.
Open Access
Article
16 April 2026Integrated Assessment of Ecosystem Carbon Storage and Ecological Risk Index Under Multi-Objective Driven Approach: A Case Study of the Karst Ecologically Fragile Area in Guangxi
In the context of global climate change, enhancing ecosystem carbon storage (CS) capacity and reducing ecological risk have become essential pathways toward achieving carbon neutrality. Land use/land cover change (LUCC), as a key factor influencing both CS and ecological security, has garnered widespread attention in recent years. However, most existing studies have focused on small-scale regions, lacking comprehensive assessments at the provincial level under multiple scenarios. To address this gap, this study takes the ecologically fragile karst region of Guangxi as a case study. Based on the PLUS-InVEST model, this study construct three land use scenarios (natural development, economic development, and ecological protection) to simulate land use changes by 2030, and then conduct an integrated assessment of the dynamics of ecosystem CS and the spatial distribution of landscape ecological risk under different scenarios. The results show that: (1) From 2000 to 2020, land use in Guangxi has shown a general trend of decreasing farmland area and increasing construction land. CS has exhibited notable spatial heterogeneity over time, with an overall upward trend, particularly in forest-rich areas where CS has increased significantly. (2) By 2030, CS will be jointly driven by land use patterns, climate change, and socioeconomic factors under different scenarios, with the ecological conservation scenario leading to the greatest increase in CS. (3) Spatial auto-correlation and LISA cluster analyses reveal a spatial coupling pattern of high carbon–low risk and low carbon–high risk, suggesting that ecological conservation measures can effectively enhance carbon sequestration. These findings provide scientific support for land use optimization, ecological protection and CS management in Guangxi under the carbon neutrality goal, and offer valuable insights for land use planning and ecological risk regulation in ecologically fragile karst regions.
Open Access
Review
13 April 2026Smart Supply Chain Management Integrating Lean Six Sigma and Industry 4.0–5.0: Framework, Applications, and Challenges for Sustainability and Resilience
Despite rapid digital transformation, modern supply chains remain vulnerable, facing demand volatility, supply disruptions, operational inefficiencies, fragmented digital adoption, limited human–AI collaboration, and growing sustainability pressures. Conventional strategies focused on cost reduction and process standardization are no longer sufficient to ensure resilience, adaptability, and long-term value creation. This study presents a Smart Supply Chain Management (SSCM) framework that integrates Lean Six Sigma (LSS) with Industry 4.0 (I4.0) digital technologies and Industry 5.0 (I5.0) human-centric innovations. Implemented through the DMAIC (Define–Measure–Analyze–Improve–Control) methodology, the framework enables predictive, data-driven decision-making, operational excellence, ESG-aligned performance, and enhanced human–AI collaboration. It leverages I4.0 technologies—including AI, IoT, big data analytics, digital twins, and robotics—for real-time visibility, automation, and predictive insights, while embedding I5.0 innovations—such as collaborative robots, AR/VR, human digital twins, and emotional AI—to enhance workforce engagement, creativity, ethical decision-making, and ergonomic safety. Sustainability and social responsibility are integrated across operations, fostering resilient, adaptable, and socially responsible supply chains. By addressing critical digital, human, and operational bottlenecks, this framework delivers novel theoretical insights, actionable guidance for practitioners, and a foundation for future empirical research, offering organizations a roadmap to achieve long-term competitiveness while aligning technology adoption with human-centric and sustainable practices.
Open Access
Article
13 April 2026Synthesis of Hydroxyapatite Porous Microspheres for Efficient Adsorption of Copper Ion from Water
Copper is a common heavy metal contamination source for water bodies, and achieving sustainable and cost-effective removal of Cu2+ from Cu-containing wastewater remains a challenge. In this study, an economical and eco-friendly adsorbent—hydroxyapatite (HA) porous microspheres—was synthesized via a simple one-step hydrothermal method. Adsorption experiments demonstrated that the maximum adsorption capacity of HA porous microspheres for Cu2+ is 116 mg/g, approximately 3.74 times that of reported HA nanosheet adsorbents. The adsorption process follows the pseudo-second-order kinetic model and the Sips isotherm model. The correlation coefficient R2 = 0.9997. Linear fitting of the amounts of Cu2+ removed and Ca2+ leached at the same time revealed an R2 value as high as 0.997, indicating that ion exchange is the dominant adsorption mechanism. Therefore, the excellent adsorption performance is attributed to the high specific surface area (207 m2/g) and mesoporous structure of the spherical HA adsorbent, which provides abundant active sites and promotes efficient ion diffusion. These structural advantages significantly enhanced the two primary adsorption mechanisms: ion exchange and surface complexation. Furthermore, the effects of adsorbent dosage, solution pH, reaction time, initial Cu2+ concentration, and temperature on adsorption performance were systematically investigated. Finally, the adsorption mechanism was investigated by characterizing the adsorbed material using XRD, FTIR, and XPS. It was determined that ion exchange, complexation, and electrostatic attraction are the main adsorption mechanisms. This study enhances the adsorption capacity of HA materials for Cu2+ by controlling morphology, offering new perspectives for developing high-performance, economical, eco-friendly, and sustainable adsorbents.
Open Access
Article
13 April 2026Spatial Analysis in Bioclimatic Architecture: Meteora, a UNESCO World Heritage Site, Greece
This study analyzes Meteora in Greece, a tourism destination whose spatial formation is shaped by bioclimatic factors, as a case study. The study analyzes how orientation, wind influence, thermal mass, and microclimate conditions affect spatial organization and architectural typologies. The relationship between space and climate is investigated using spatial mapping, orientation analysis, field observation, and photographic documentation methods. Findings indicate that monastic entrances are predominantly oriented toward southeastern exposures to maximize winter solar gain and reduce northern wind impact, while hermit caves cluster on south-facing rock surfaces, benefiting from thermal stability. The study concludes that Meteora represents an early example of climate-adaptive spatial planning, where bioclimatic intelligence shaped both sacred settlement patterns and contemporary tourism sustainability.
Open Access
Article
13 April 2026Br-Doped Nickel-Cobalt Phosphide Nanoarrays on Engineered Porous NF for High-Efficiency Water Oxidation
The rational design of cost-effective electrocatalysts for the oxygen evolution reaction (OER) is pivotal for advancing green hydrogen production. This study presents a substrate-engineered Br-doped nickel-cobalt phosphide (NiCoP) electrocatalyst fabricated through a stepwise synthesis protocol. A porous and roughened nickel foam (NF) is initially constructed to provide a 3D conductive scaffold, followed by the hydrothermal growth of vertically aligned NiCo-layered double hydroxide (LDH) nanosheets. Subsequent controlled pyrolysis in the presence of a bromine source yields Br-doped NiCoP nanoarrays securely anchored on the NF/Ni substrate. Comprehensive structural characterization confirms the successful Br incorporation, which induces lattice distortion and optimizes the electronic configuration of NiCoP, while the interconnected porous architecture enhances electrolyte infiltration and gas release. Electrochemical evaluations reveal exceptional OER performance, achieving an ultralow overpotential of 220 mV at 10 mA·cm−2 and a Tafel slope of 61.2 mV·dec−1 in 1 M KOH, surpassing most reported NiCo-based phosphides. In-situ Raman spectroscopy and post-OER characterization uncover dynamic surface reconstruction into Br-enriched (oxy)hydroxide active species, elucidating the dual role of Br as both an electronic modulator and a stabilizer for reactive intermediates. This work demonstrates a substrate-guided heteroatom doping strategy to engineer high-performance bimetallic phosphide electrocatalysts, offering insights into interface engineering for sustainable energy technologies.