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Recent Articles  

16 pages, 281 KiB  
Article
Modeling Concrete and Virtual Manipulatives for Mathematics Teacher Training: A Case Study in ICT-Enhanced Pedagogies
by Angela Ogbugwa Ochogboju and Javier Díez-Palomar
Information 2025, 16(8), 698; https://doi.org/10.3390/info16080698 (registering DOI) - 17 Aug 2025
Abstract
This feature paper explores the comparative pedagogical roles of concrete and virtual manipulatives in preservice mathematics teacher education. Based on a design-based research (DBR) methodology, this study investigates the effects of tangible tools (e.g., base-ten blocks, fraction circles) and digital applications (e.g., GeoGebra [...] Read more.
This feature paper explores the comparative pedagogical roles of concrete and virtual manipulatives in preservice mathematics teacher education. Based on a design-based research (DBR) methodology, this study investigates the effects of tangible tools (e.g., base-ten blocks, fraction circles) and digital applications (e.g., GeoGebra Classic 6, Polypad) on preservice teachers’ problem solving, conceptual understanding, engagement, and instructional reasoning. Data were collected through surveys (n = 53), semi-structured interviews (n = 25), and classroom observations (n = 30) in a Spanish university’s teacher education program. Key findings show that both forms of manipulatives significantly enhance engagement and conceptual clarity, but are affected by logistical and digital access barriers. This paper further proposes a theoretically grounded model for simulating manipulatives through ICT-based environments, enabling scalable and adaptive mathematics teacher training. By linking constructivist learning theory, the Technologically Enhanced Learning Environment (TELE) framework, and simulation-based pedagogy, this model aims to replicate the cognitive, affective, and collaborative affordances of manipulatives in virtual contexts. Distinct from prior work, this study contributes an integrated theoretical and practical framework, contextualized through empirical classroom data, and presents a clear plan for real-world ICT-based implementation. The findings provide actionable insights for teacher educators, edtech developers, and policymakers seeking to expand equitable and engaging mathematics education through simulation and blended modalities. Full article
(This article belongs to the Special Issue ICT-Based Modelling and Simulation for Education)
14 pages, 2017 KiB  
Article
The S2 Glycoprotein Subunit Determines Intestinal Tropism in Infectious Bronchitis Virus
by Zhenkai Dai, Jing Zhang, Ying Huang, Benli Huang, Zhengzhong Xiao, Keyu Feng, Guanming Shao, Xinheng Zhang and Qingmei Xie
Microorganisms 2025, 13(8), 1918; https://doi.org/10.3390/microorganisms13081918 (registering DOI) - 17 Aug 2025
Abstract
The molecular basis for the distinct intestinal tropism of infectious bronchitis virus (IBV) strains remains poorly understood. This study identifies the S2 subunit of the spike glycoprotein as the critical determinant conferring duodenal tropism to the IBV CSL strain. Comparative pathogenesis in specific-pathogen-free [...] Read more.
The molecular basis for the distinct intestinal tropism of infectious bronchitis virus (IBV) strains remains poorly understood. This study identifies the S2 subunit of the spike glycoprotein as the critical determinant conferring duodenal tropism to the IBV CSL strain. Comparative pathogenesis in specific-pathogen-free (SPF) chicks revealed that the CSL strain achieved significantly higher viral titers in the duodenum compared to strains D90, PYG QX1, and XXX QX5. This duodenal replication was associated with severe epithelial inflammation, characterized by upregulation of pro-inflammatory cytokines (IL-6, IL-17A, IL-22, TNF-α, IFN-β, IFN-γ) and disruption of barrier integrity via downregulation of tight junction proteins (Occludin, Claudin-1, ZO-1). Crucially, reverse genetics using the non-enterotropic D90 backbone demonstrated that recombinant viruses carrying the CSL-S2 gene (rD90-ΔS/CSL and rD90-ΔS2/CSL), but not those carrying CSL-S1 (rD90-ΔS1/CSL), replicated efficiently and induced inflammation in the duodenum, phenocopying wild-type CSL. In contrast, renal tropism was independent of the S2 subunit. These findings establish the S2 subunit as both necessary and sufficient for IBV duodenal tropism, uncoupling it from renal pathogenicity. This identifies S2 as a prime molecular target for developing next-generation vaccines against intestinal IBV pathotypes. Full article
(This article belongs to the Special Issue Animal Viral Infectious Diseases)
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18 pages, 992 KiB  
Article
Multi-Criteria Optimization of Yarn Guide Manufacturing Processes
by Aleksandra Jarco, Stanisław Płonka and Piotr Zyzak
Appl. Sci. 2025, 15(16), 9055; https://doi.org/10.3390/app15169055 (registering DOI) - 17 Aug 2025
Abstract
Due to the insufficient durability (wear resistance) of guides made of 50SiCr4 steel tempered to a hardness of 400 HB, 14 variants of the yarn guide manufacturing process were developed. The ring spinner yarn guides were manufactured from three types of steel, from [...] Read more.
Due to the insufficient durability (wear resistance) of guides made of 50SiCr4 steel tempered to a hardness of 400 HB, 14 variants of the yarn guide manufacturing process were developed. The ring spinner yarn guides were manufactured from three types of steel, from Al99.5% and its alloys, as well as from porcelain, Al2O3 sinter, and WC 94% + Co 6% tungsten carbide. The unit manufacturing cost and six manufacturing quality criteria were used as evaluation criteria: four parameters of the geometric structure of the surface and the maximum surface hardness, as well as the depth of hardening of the surface layer. The presented variants were then evaluated against the seven criteria, determining a set of optimal solutions in the Pareto sense. This set consisted of 12 variants. A distance function was then used to select the best manufacturing process variant, corresponding to the smallest value of the distance function. In this study, this is the process variant for which the semi-finished product is a drawn bar ø6 mm of C45 steel tempered to a hardness of 350 HB with a glazed porcelain insert. The alternative process, with a slightly higher distance function value, is the variant with the Al2O3 ceramic sinter insert. Full article
(This article belongs to the Section Mechanical Engineering)
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17 pages, 2268 KiB  
Review
Grid Frequency Fluctuation Compensation by Using Electrolysis: Literature Survey
by Jacek Salaciński, Jarosław Milewski, Paweł Ryś, Jan Paczucha and Mariusz Kłos
Energies 2025, 18(16), 4376; https://doi.org/10.3390/en18164376 (registering DOI) - 17 Aug 2025
Abstract
This paper presents a novel literature survey on leveraging electrolysis for grid frequency stabilization in power systems with high penetration of renewable energy sources (RESs), uniquely integrating global research findings with specific insights into the Polish energy context—a region facing acute grid challenges [...] Read more.
This paper presents a novel literature survey on leveraging electrolysis for grid frequency stabilization in power systems with high penetration of renewable energy sources (RESs), uniquely integrating global research findings with specific insights into the Polish energy context—a region facing acute grid challenges due to rapid RES growth and infrastructure limitations. The intermittent nature of wind and solar power exacerbates frequency fluctuations, necessitating dynamic demand-side management solutions like hydrogen production via electrolysis. By synthesizing over 30 studies, the survey reveals key results: electrolysis systems, particularly PEM and alkaline electrolyzers, can reduce frequency deviations by up to 50% through fast frequency response (FFR) and primary reserve provision, as demonstrated in simulations and real-world pilots (e.g., in France and the Netherlands); however, economic viability requires enhanced compensation schemes, with current models showing unprofitability without subsidies. Technological advancements, such as transistor-based rectifiers, improve efficiency under partial loads, while integration with RES farms mitigates overproduction issues, as evidenced by Polish cases where 44 GWh of solar energy was curtailed in March 2024. The survey contributes actionable insights for policymakers and engineers, including recommendations for deploying electrolyzers to enhance grid resilience, support hydrogen-based transportation, and facilitate Poland’s target of 50.1% RESs by 2030, thereby advancing the green energy transition amid rising instability risks like blackouts in RES-heavy systems. Full article
(This article belongs to the Section A5: Hydrogen Energy)
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13 pages, 217 KiB  
Article
Pancreatogenic Type 3c Diabetes After Major Pancreatic Resections for Chronic Pancreatitis: A Single-Center Experience of More than 100 Surgical Cases
by Dhruv J. Patel, Alexandra D. Nelson, Melissa E. Chen, Morgan S. Jones and Chirag S. Desai
J. Clin. Med. 2025, 14(16), 5817; https://doi.org/10.3390/jcm14165817 (registering DOI) - 17 Aug 2025
Abstract
Background/Objectives: The impact of surgical resection for chronic pancreatitis on subsequent endocrine outcomes remains unclear. Methods: A single-center analysis of patients with chronic pancreatitis who underwent either a parenchymal-preserving surgery (PPS) or a total pancreatectomy (TP) with/without islet autotransplantation (IAT) between 2018 and [...] Read more.
Background/Objectives: The impact of surgical resection for chronic pancreatitis on subsequent endocrine outcomes remains unclear. Methods: A single-center analysis of patients with chronic pancreatitis who underwent either a parenchymal-preserving surgery (PPS) or a total pancreatectomy (TP) with/without islet autotransplantation (IAT) between 2018 and 2024 was performed. Preoperative and postoperative changes in hemoglobin A1C (HbA1C) and long-acting insulin dose were compared. Univariate and multivariate analysis was performed to identify factors associated with 1-year insulin independence. Results: A total of 104 patients underwent surgery for chronic pancreatitis between 2018 and 2024. A total of 35 (33.7%) patients underwent TPIAT, 8 (7.7%) underwent TP, and 61 (58.7%) underwent PPS (n = 18 Whipple, n = 38 distal pancreatectomy, n = 5 drainage procedure). Median HbA1C increased after surgery (5.7% vs. 6.8%, p < 0.001). The majority of patients (n = 73, 70.2%) were discharged postoperatively without any basal insulin requirement. Of the 31 patients discharged on basal insulin, 18 patients (58.1%) were not on basal insulin preoperatively; the other 13 patients (41.9%) that were on basal insulin preoperatively had a median change in their postoperative basal insulin dose of −5 units [IQR: −12–−1]. A total of 46 patients (52.3%) were insulin independent at one year, with PPS more favorable than TPIAT (47.6% vs. 21.7%, p < 0.001) and less likely to have been on preoperative basal insulin. Conclusions: Surgery for chronic pancreatitis resulted in an increase in HbA1C postoperatively; however, diabetes remained well-controlled as the majority of patients remained off basal insulin at one year from surgery. PPS patients were more likely to be insulin-independent. Full article
(This article belongs to the Special Issue Interventional and Surgical Treatment of Acute and Chronic Pancreatitis)
19 pages, 1359 KiB  
Article
A Novel Shape-Prior-Guided Automatic Calibration Method for Free-Hand Three-Dimensional Ultrasonography
by Xing-Yang Liu, Jia-Xu Zhao, Hui Tang and Guang-Quan Zhou
Sensors 2025, 25(16), 5104; https://doi.org/10.3390/s25165104 (registering DOI) - 17 Aug 2025
Abstract
Ultrasound probe calibration is crucial for precise spatial mapping in ultrasound-guided surgical navigation and free-hand 3D ultrasound imaging as it establishes the rigid-body transformation between the ultrasound image plane and an external tracking sensor. However, the existing methods often rely on manual feature [...] Read more.
Ultrasound probe calibration is crucial for precise spatial mapping in ultrasound-guided surgical navigation and free-hand 3D ultrasound imaging as it establishes the rigid-body transformation between the ultrasound image plane and an external tracking sensor. However, the existing methods often rely on manual feature point selection and exhibit limited robustness to outliers, resulting in reduced accuracy, reproducibility, and efficiency. To address these limitations, we propose a fully automated calibration framework that leverages the geometric priors of an N-wire phantom to achieve reliable recognition. The method incorporates a robust feature point extraction algorithm and integrates a hybrid outlier rejection strategy based on the Random Sample Consensus (RANSAC) algorithm. The experimental evaluations demonstrate sub-millimeter accuracy (<0.6 mm) across varying imaging depths, with the calibration process completed in under two minutes and exhibiting high repeatability. These results suggest that the proposed framework provides a robust, accurate, and time-efficient solution for ultrasound probe calibration, with strong potential for clinical integration. Full article
(This article belongs to the Section Biomedical Sensors)
13 pages, 1885 KiB  
Article
The Silent Conquest of Aedes albopictus in Navarre: Unraveling the Unstoppable Advance of the Tiger Mosquito Invasion in Progress
by Miguel Ángel González-Moreno, Estrella Miqueleiz-Autor, Itsaso Oroz-Santamaría, Miguel Domench-Guembe and Irati Poveda-Urkixo
Insects 2025, 16(8), 852; https://doi.org/10.3390/insects16080852 (registering DOI) - 17 Aug 2025
Abstract
Background: Aedes albopictus, the tiger mosquito, is an invasive exotic species native to Southeast Asia, currently established in Europe, including Spain and the region of Navarre. This vector poses an emerging public health threat due to its ability to transmit dengue, Zika, [...] Read more.
Background: Aedes albopictus, the tiger mosquito, is an invasive exotic species native to Southeast Asia, currently established in Europe, including Spain and the region of Navarre. This vector poses an emerging public health threat due to its ability to transmit dengue, Zika, and chikungunya viruses, which cause diseases in humans. This study presents novel findings by documenting the progression of the invasion of Aedes albopictus in the Navarre region in northern Spain, tracing its status from initial absence to its definitive establishment in certain areas. Methods: Surveillance in Navarre within the LIFE-IP NAdapta-CC project was conducted through a network of strategically placed ovitraps and adult traps to collect eggs and adult mosquitoes. Awareness campaigns and outreach events were organized to inform local authorities and the public about monitoring results and preventive measures. Results: Monitoring confirms Aedes albopictus’ expansion across Navarre despite training, information dissemination, and control efforts, including entomological containment in targeted areas. Conclusions: Eliminating breeding sites remains the most effective strategy to limit its spread. Complete eradication is unlikely given its invasive nature, and the species is expected to expand and colonize at least part of the region in the coming years. Full article
(This article belongs to the Special Issue Surveillance and Management of Invasive Insects)
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23 pages, 3637 KiB  
Article
Screening and Assessment of Hypoglycemic Active Peptide from Natural Edible Pigment Phycobiliprotein Based on Molecular Docking, Network Pharmacology, Enzyme Inhibition Assay Analyses, and Cell Experiments
by Zhimin Zhu, Yan Zhang, Bingbing He, Limin He, Guihong Fang, Yi Ning, Pengcheng Fu and Jing Liu
Mar. Drugs 2025, 23(8), 331; https://doi.org/10.3390/md23080331 (registering DOI) - 17 Aug 2025
Abstract
Phycobiliproteins have gained increasing attention for their antidiabetic potential, yet the specific bioactive peptides and their targets and molecular mechanisms have remained unclear. In this study, four peptides with potential hypoglycemic activity were identified through virtual screening. Network pharmacology was employed to elucidate [...] Read more.
Phycobiliproteins have gained increasing attention for their antidiabetic potential, yet the specific bioactive peptides and their targets and molecular mechanisms have remained unclear. In this study, four peptides with potential hypoglycemic activity were identified through virtual screening. Network pharmacology was employed to elucidate their hypoglycemic mechanism in the treatment of T2DM. A subsequent in vitro assay confirmed that the synthesized peptides, GR-5, SA-6, VF-6, and IR-7, exhibited significant inhibitory activity against α-glucosidase and DPP-IV. In insulin-resistant HepG2 models, all four peptides exhibited no cytotoxicity. Among them, GR-5 demonstrated the most promising therapeutic potential by remarkably enhancing cellular glucose consumption capacity. Furthermore, GR-5 administration substantially increased glycogen synthesis and enzymatic activities of hexokinase and pyruvate kinase with statistically significant improvements compared to the control groups. This study provides novel peptide candidates for T2DM treatment and validates an integrative strategy for targeted bioactive peptide discovery, advancing the development of algal protein-based therapeutics. Full article
(This article belongs to the Special Issue Marine Nutraceuticals and Functional Foods: 2nd Edition)
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10 pages, 888 KiB  
Article
Divergence in Elevation Diversity Patterns of Geckos on Two Mountains in the Hainan Tropical Rainforest National Park
by Yuting Tan, Zhixue Lin, Fanrong Xiao and Hongmin Yu
Animals 2025, 15(16), 2410; https://doi.org/10.3390/ani15162410 (registering DOI) - 17 Aug 2025
Abstract
Investigating altitudinal distribution patterns of species richness represents a fundamental research objective in biogeography and community ecology. Hainan Island has tropical rainforests ranging from sea level to >1800 m a.s.l., with various animal species, including reptiles such as geckos. Information on the altitudinal [...] Read more.
Investigating altitudinal distribution patterns of species richness represents a fundamental research objective in biogeography and community ecology. Hainan Island has tropical rainforests ranging from sea level to >1800 m a.s.l., with various animal species, including reptiles such as geckos. Information on the altitudinal distribution patterns of animal diversity on Hainan Island is limited. Thus, from October 2020 to June 2023, we surveyed Gekkonidae species on Diaoluo Mountain and Jianfeng Ridge in the Hainan Tropical Rainforest National Park using a line transect method. The two study sites were divided into seven altitudinal zones at intervals of 150 m from 31 to 1080 m a.s.l. We tested correlations between abundance and species diversity indices and altitude. Five gecko species were identified. The endemic Gekko similignum mainly occurred at high-altitude areas on both mountains, whereas Hemidactylus frenatus occupied low-altitude areas. Gehyra mutilata had the lowest abundance among all species at all altitudes. Diaoluo Mountain exhibited a higher species diversity and abundance than Jianfeng Ridge. Geckos on Diaoluo Mountain were mainly distributed between 31 and 920 m a.s.l., presenting a bimodal distribution, with peaks appearing in altitudinal zones II (181–331 m a.s.l.) and VI (781–931 m a.s.l.). The gecko distribution on Jianfeng Ridge ranged from 31 to 948 m a.s.l., presenting a unimodal distribution, with a peak in altitudinal zone V (631–781 m a.s.l.). Full article
(This article belongs to the Special Issue Evolution, Diversity, and Conservation of Herpetofauna: Second Edition)
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14 pages, 553 KiB  
Article
Prevalence, Microbiological Profile, and Risk Factors of Healthcare-Associated Infections in Intensive Care Units: A Retrospective Study in Aljouf, Saudi Arabia
by Israa Taresh Alshammari and Yasir Alruwaili
Microorganisms 2025, 13(8), 1916; https://doi.org/10.3390/microorganisms13081916 (registering DOI) - 17 Aug 2025
Abstract
Hospital infection prevention is critical to patient safety, yet data on the prevalence and contributing factors of healthcare-associated infections (HAIs) in Aljouf, Saudi Arabia, are scarce. This retrospective cross-sectional study aimed to investigate the prevalence, microbiological profile, and associated risk factors of HAIs [...] Read more.
Hospital infection prevention is critical to patient safety, yet data on the prevalence and contributing factors of healthcare-associated infections (HAIs) in Aljouf, Saudi Arabia, are scarce. This retrospective cross-sectional study aimed to investigate the prevalence, microbiological profile, and associated risk factors of HAIs among intensive care unit (ICU) patients in a referral hospital between January 2020 and December 2023. Medical records of 260 ICU patients were reviewed for demographic details, comorbidities, infection types, pathogens, and invasive device use. Forty patients (15.38%) developed HAIs with the highest prevalence in 2020 (50.0%). Infections were more common in males (56.5%) and those aged ≥56 years (54.6%). The predominant infections were catheter-associated urinary tract infections (47.5%), ventilator-associated pneumonia (35.0%), and central line-associated bloodstream infections (17.5%). Klebsiella pneumoniae (35.0%) and Acinetobacter baumannii (27.5%), pathogens commonly associated with multidrug resistance, were the most frequently isolated organisms. All HAI cases involved invasive device use with the use of three or more devices significantly increasing infection risk (p < 0.05). Additionally, 85% of infected patients had chronic conditions, primarily hypertension or diabetes. These findings emphasize the urgent need for strengthened infection control practices and targeted antimicrobial strategies to reduce HAIs and improve ICU patient outcomes in underreported regions. Full article
(This article belongs to the Special Issue Healthcare-Associated Infections and Antimicrobial Therapy—2nd Edition)
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15 pages, 1152 KiB  
Article
Formation and Melting of Hydrate with Binary CO2/C2H6 Mixtures in Silica Sand: Comparison Between Dissociation Data and Phase Equilibrium of Pure CO2 and C2H6 Hydrates
by Alberto Maria Gambelli, Federico Rossi and Giovanni Gigliotti
C 2025, 11(3), 63; https://doi.org/10.3390/c11030063 (registering DOI) - 17 Aug 2025
Abstract
The present study deals with hydrate formation with binary gaseous mixtures consisting of carbon dioxide mixed with ethane at varying concentrations. Since the production of hydrates is recognised as a stochastic process and also due to the marked influence that experimental apparatuses often [...] Read more.
The present study deals with hydrate formation with binary gaseous mixtures consisting of carbon dioxide mixed with ethane at varying concentrations. Since the production of hydrates is recognised as a stochastic process and also due to the marked influence that experimental apparatuses often have on the results, the continuous updating of the literature with new experimental data is needed. Hydrates were produced and dissociated in excess water and in unstirred conditions. The dissociation values were collected and tabulated. Each test was plotted and compared with the phase boundary equilibrium conditions of pure ethane and pure carbon dioxide hydrates. The results confirmed the lowering of pressures required for hydrate formation with the increase in ethane concentration in the gas mixture. In detail, the dissociation condition for CO2/C2H6 hydrates was tested within the following thermodynamic ranges: 0.1–13 °C and 11.26–36.75 bar for the 25/75 vol% mixture, 0.1–13 °C and 9.74–35.07 bar for the 50/50 vol% mixture and 7.0–12.9 °C and 17.36–30.05 bar for the 75/25 vol% mixture. When 75 vol% ethane was used, the dissociation of hydrates occurred at conditions corresponding to the phase equilibrium of pure ethane hydrates, denoting that the system reached the most favourable thermodynamic conditions possible despite the presence of 25 vol% CO2. Full article
(This article belongs to the Special Issue 10th Anniversary of C — Journal of Carbon Research)
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23 pages, 12244 KiB  
Article
The Petrology of Tuffisite in a Trachytic Diatreme from the Kızılcaören Alkaline Silicate–Carbonatite Complex, NW Anatolia
by Yalçın E. Ersoy, Hikmet Yavuz, İbrahim Uysal, Martin R. Palmer and Dirk Müller
Minerals 2025, 15(8), 867; https://doi.org/10.3390/min15080867 (registering DOI) - 17 Aug 2025
Abstract
The Kızılcaören alkaline silicate–carbonatite complex, located in the Sivrihisar (Eskişehir, NW Anatolia) region, includes phonolite, trachyte, carbonatite, pyroclastics, and REE mineralization (bastnäsite as a critical REE mineral). The emplacement and origin of this complex are poorly constrained, as previous studies mostly concentrated on [...] Read more.
The Kızılcaören alkaline silicate–carbonatite complex, located in the Sivrihisar (Eskişehir, NW Anatolia) region, includes phonolite, trachyte, carbonatite, pyroclastics, and REE mineralization (bastnäsite as a critical REE mineral). The emplacement and origin of this complex are poorly constrained, as previous studies mostly concentrated on the petrology of the alkaline rocks, carbonatite, and REE-mineralization, and little attention has been paid to the texture, composition, and origin of the pyroclastic rocks. The pyroclastic rocks in the region contain both rounded and angular-shaped cognate and wall-rock xenoliths derived from syenitic/trachytic hypabyssal rocks and carbonatites, as well as juvenile components such as carbonatite droplets and pelletal lapilli. The syenitic/trachytic hypabyssal rock fragments contain sanidine with high BaO (up to 3.3 wt.%) contents, amphibole (magnesio-fluoro-arfvedsonite), and apatite. Some clasts seem to have reacted with carbonatitic material, including high-SrO (up to 0.6 wt.%) calcite, dolomite, baryte, benstonite, fluorapatite. The carbonatite rock fragments are composed of calcite, baryte, fluorite, and bastnäsite. The carbonatite droplets have a spinifex-like texture and contain rhombohedral Mg-Fe-Ca carbonate admixtures, baryte, potassic-richterite, and parisite embedded in larger crystals of high-SrO (up to 0.7 wt.%) calcite. The spherical–elliptical pelletal lapilli (2–3 mm) contain a lithic center mantled by flow-aligned prismatic sanidine (with BaO up to 3.5 wt.%) microphenocrysts settled in a high-SrO (up to 0.7 wt.%) cryptocrystalline CaCO3 matrix. All these components are embedded in an ultra-fine-grained matrix. The EPMA results from the matrix reveal that, chemically, it consists largely of BaO-rich sanidine, with minor carbonate, baryte and Fe-Ti oxide. The presence of pelletal lapilli, which is one of the most common and characteristic features of diatreme fillings in alkaline silicate–carbonatite complexes, reveals that the pyroclastic rocks in the region represent a tuffisite formed by intrusive fragmentation and fluidization processes in the presence of excess volatile components consisting mainly of CO2 and F. Full article
(This article belongs to the Special Issue Critical Metal Minerals, 2nd Edition)
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20 pages, 1359 KiB  
Article
Sustainable Acrylic Thermoplastic Composites via Vacuum-Assisted Resin Infusion Molding: Evaluation and Comparison of Fabrics and Recycled Non-Woven Carbon Fiber as Reinforcement
by Sara Taherinezhad Tayebi, Tommaso Pini, Bruno Caruso, Matteo Sambucci, Irene Bavasso, Fabrizio Sarasini, Jacopo Tirillò and Marco Valente
J. Compos. Sci. 2025, 9(8), 441; https://doi.org/10.3390/jcs9080441 (registering DOI) - 17 Aug 2025
Abstract
Recently, environmental issues have compelled people worldwide to pursue sustainability and adopt circular economy practices across all engineering sectors, including polymer engineering and composite fabrication. A transition towards fabric-reinforced thermoplastics (FRTPs), a greener solution, has been recommended in recent years. On the other [...] Read more.
Recently, environmental issues have compelled people worldwide to pursue sustainability and adopt circular economy practices across all engineering sectors, including polymer engineering and composite fabrication. A transition towards fabric-reinforced thermoplastics (FRTPs), a greener solution, has been recommended in recent years. On the other hand, utilizing recovered reinforcing phases, such as recycled carbon fiber (rCF), has attracted tremendous attention. In this framework, the aim of this research is to investigate the performance of acrylic-based FRTPs (Elium® resin developed by Arkema). Woven virgin carbon fiber (vCF) and non-woven recycled carbon fiber (rCF) fabrics were used as reinforcement architectures for the fabrication of composites via resin infusion. The optimized formulation selected for the matrix showed flexural modulus and flexural strength of 5 GPa and 78 MPa, respectively. Composites prepared with woven vCF reached 36 GPa and 620 MPa values of flexural modulus and strength, respectively. The study of non-woven fabric is of particular interest, because the web is composed of recycled carbon fibers obtained from end-of-life (EoL) thermoset composite components. The results were promising; the flexural modulus reached 8 GPa, and the flexural strength was 113 MPa. Improvements are anticipated, especially in the parameters and conditions of the molding process. Full article
(This article belongs to the Special Issue Carbon Fiber Composites, 4th Edition)
27 pages, 3824 KiB  
Article
Sustainable Data Construction and CLS-DW Stacking for Traffic Flow Prediction in High-Altitude Plateau Regions
by Wu Bo, Xu Gong, Fei Chen, Haisheng Ren, Junhao Chen, Delu Li and Fengying Gou
Sustainability 2025, 17(16), 7427; https://doi.org/10.3390/su17167427 (registering DOI) - 17 Aug 2025
Abstract
This study proposes a novel vehicle speed prediction model for plateau transportation—CLS-DW Stacking (Constrained Least Squares Dynamic Weighting Model Stacking)—which holds significant implications for the sustainable development of transportation systems in high-altitude regions. Research on sharp-curved roads on mountainous plateaus remains scarce. Compared [...] Read more.
This study proposes a novel vehicle speed prediction model for plateau transportation—CLS-DW Stacking (Constrained Least Squares Dynamic Weighting Model Stacking)—which holds significant implications for the sustainable development of transportation systems in high-altitude regions. Research on sharp-curved roads on mountainous plateaus remains scarce. Compared with plain areas, data acquisition in such regions is constrained by government confidentiality policies, while complex environmental and topographical conditions lead to substantial variations in road alignment and elevation. To address these challenges, this study presents a sustainable data acquisition and construction method: unmanned aerial vehicle (UAV) video data are processed through road image segmentation, trajectory tracking, and three-dimensional modeling to generate multi-source heterogeneous datasets for both single-curve and continuous-curve scenarios. Building upon these datasets, the proposed framework integrates constrained least squares with multiple deep learning methods to achieve accurate traffic flow prediction. Bi-LSTM (Bidirectional Long Short-Term Memory), Informer, and GRU (Gated Recurrent Unit) are employed as base learners, and the loss function is redefined with non-negativity and normalization constraints on the weights. This ensures optimal weight coefficients for each base learner, with the final prediction obtained via weighted summation. The experimental results show that, compared with single deep learning models such as Informer, the proposed model reduces the mean squared error (MSE) by 1.9% on the single curve dataset and by 7.7% on the continuous curve dataset. Furthermore, by combining vehicle speed predictions across different altitude gradients with decision tree-based interpretable analysis, this research provides scientific support for developing altitude-specific and precision-oriented speed limit policies. The outcomes contribute to accident risk reduction, traffic congestion mitigation, and carbon emission reduction, thereby improving road resource utilization efficiency. This work not only fills the research gap in traffic prediction for sharp-curved plateau roads but also supports the construction of green transportation systems and the broader objectives of sustainable development in high-altitude regions. Full article
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20 pages, 1550 KiB  
Article
Exploiting Maritime Wi-Fi: Practical Assessment of Onboard Network Vulnerabilities
by Marko Vukšić, Jasmin Ćelić, Ivan Panić and Aleksandar Cuculić
J. Mar. Sci. Eng. 2025, 13(8), 1576; https://doi.org/10.3390/jmse13081576 (registering DOI) - 17 Aug 2025
Abstract
With the growing integration of digital technologies on modern vessels, ranging from satellite links and mobile networks to onboard Wi-Fi, the exposure of maritime systems to cyber threats has become a pressing concern. Wireless networks on ships, although essential for operations and crew [...] Read more.
With the growing integration of digital technologies on modern vessels, ranging from satellite links and mobile networks to onboard Wi-Fi, the exposure of maritime systems to cyber threats has become a pressing concern. Wireless networks on ships, although essential for operations and crew welfare, often lack sufficient protection and are frequently overlooked in broader cybersecurity strategies. This article explores vulnerabilities linked to Man-in-the-Middle attacks and rogue access points, particularly in port areas where attackers may exploit signal range and proximity. A simulation carried out in a public setting near the Port of Rijeka demonstrated how standard crew devices could be lured into connecting to a counterfeit Wi-Fi network, resulting in traffic interception and potential data leaks. Although practical limitations, such as signal attenuation and distance, reduce the feasibility of such intrusions at sea, the risk remains significant while in port. Insecure configurations and common user behaviors were identified as key enablers. The article outlines a series of countermeasures aligned with international guidelines ranging from segmentation and encryption to crew training and intrusion detection. Addressing these wireless vulnerabilities is essential for building resilience and ensuring that digital transformation efforts in the maritime sector do not come at the expense of security. Full article
(This article belongs to the Section Ocean Engineering)
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30 pages, 428 KiB  
Article
Classification of Four-Dimensional CR Submanifolds of the Homogenous Nearly Kähler S3×S3 Which Almost Complex Distribution Is Almost Product Orthogonal on Itself
by Nataša Djurdjević
Mathematics 2025, 13(16), 2638; https://doi.org/10.3390/math13162638 (registering DOI) - 17 Aug 2025
Abstract
The product manifold S3×S3, which belongs to the homogenous six-dimensional nearly Kähler manifolds, admits two structures, the almost complex structure J and the almost product structure P. The investigation of embeddings of different classes of CR submanifolds [...] Read more.
The product manifold S3×S3, which belongs to the homogenous six-dimensional nearly Kähler manifolds, admits two structures, the almost complex structure J and the almost product structure P. The investigation of embeddings of different classes of CR submanifolds of S3×S3 was started some time ago by investigating three-dimensional CR submanifolds. It resulted that the almost product structure P is very important for the study of CR submanifolds of S3×S3, since submanifolds characterized by different actions of the almost product structure on base vector fields often appear as a result of the study of some specific types of CR submanifolds. Therefore, the investigation of four-dimensional CR submanifolds of S3×S3 is initiated in this article. The main result is the classification of four-dimensional CR submanifolds of S3×S3, whose almost complex distribution D1 is almost product orthogonal on itself. First, it was proved that such submanifolds have a non-integrable almost complex distribution, and then it was proved that these submanifolds are locally product manifolds of curves and three-dimensional CR submanifolds of S3×S3 of the same type, and they were therefore constructed in this way. Full article
(This article belongs to the Special Issue Submanifolds in Metric Manifolds, 2nd Edition)
15 pages, 2635 KiB  
Article
Transient Synchronous Stability Analysis and Control Improvement for Power Systems with Grid-Following Converters
by Zhiying Chen and Lin Guan
Electronics 2025, 14(16), 3263; https://doi.org/10.3390/electronics14163263 (registering DOI) - 17 Aug 2025
Abstract
Amid the global transition towards sustainable energy, the increasing integration of power sources equipped with grid-following (GFL) voltage source converters (VSCs) into power systems has significantly impacted transient synchronous stability. How to analyze the transient synchronous mechanism of power systems with GFL and [...] Read more.
Amid the global transition towards sustainable energy, the increasing integration of power sources equipped with grid-following (GFL) voltage source converters (VSCs) into power systems has significantly impacted transient synchronous stability. How to analyze the transient synchronous mechanism of power systems with GFL and how to fully utilize GFL to enhance the transient synchronous stability are critical challenges. Therefore, based on the extended equal area criterion (EEAC), the influence mechanism of the transient voltage stability on the transient synchronous stability of multi-machine power systems is analyzed. Furthermore, an explicit power angle equation is derived, incorporating the distribution location and active power characteristics of GFL, to explain their impact on the transient synchronous stability between synchronous generators (SGs). Inspired by the above insights, an improved control strategy of GFL is proposed for transient stability enhancement. The proposed strategy can effectively accelerate the voltage recovery speed and enhance the transient synchronous stability under different coherence grouping scenarios. Finally, the correctness of the mechanism analysis and the effectiveness of the proposed control strategy are validated on the simplified system of a real power grid using the PSCAD platform. Full article
(This article belongs to the Special Issue Advances in Power System Dynamics, Stability, Control and Dispatch with Large-Scale Renewable Energy Penetrated, 2nd Edition)
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27 pages, 1256 KiB  
Review
A Primer on Spacetime Singularities I: Mathematical Framework
by Jean-Pierre Luminet
Universe 2025, 11(8), 272; https://doi.org/10.3390/universe11080272 (registering DOI) - 17 Aug 2025
Abstract
This article presents a comprehensive and rigorous overview of spacetime singularities within the framework of classical General Relativity. Singularities are defined through the failure of geodesic completeness, reflecting the limits of predictability in spacetime evolution. This paper reviews the mathematical structures involved, including [...] Read more.
This article presents a comprehensive and rigorous overview of spacetime singularities within the framework of classical General Relativity. Singularities are defined through the failure of geodesic completeness, reflecting the limits of predictability in spacetime evolution. This paper reviews the mathematical structures involved, including differentiability classes of the metric, and explores key constructions such as Geroch’s and Schmidt’s formulations of singular boundaries. A detailed classification of singularities—quasi-regular, non-scalar, and scalar—is proposed, based on the behavior of curvature tensors along incomplete curves. The limitations of previous approaches, including the cosmic censorship conjecture and extensions beyond General Relativity, are critically examined. This work also surveys the major singularity theorems of Penrose and Hawking, emphasizing their implications for gravitational collapse and cosmology. By focusing exclusively on the classical regime, this article lays a solid foundation for the systematic study of singular structures in relativistic spacetimes. Full article
33 pages, 5443 KiB  
Article
Effects of Carbonation Conditions and Sand-to-Powder Ratio on Compressive Strength and Pore Fractal Characteristics of Recycled Cement Paste–Sand Mortar
by Yuchen Ye, Zhenyuan Gu, Chenhui Zhu and Jie Yang
Buildings 2025, 15(16), 2906; https://doi.org/10.3390/buildings15162906 (registering DOI) - 17 Aug 2025
Abstract
This study investigates the influence of carbonation duration and sand-to-powder ratio on the compressive strength and pore structure of recycled cement paste–sand (RCP-S) mortar. Specimens incorporating four different sand contents were subjected to carbonation for 1 and 24 h. Fractal dimensions, ranging from [...] Read more.
This study investigates the influence of carbonation duration and sand-to-powder ratio on the compressive strength and pore structure of recycled cement paste–sand (RCP-S) mortar. Specimens incorporating four different sand contents were subjected to carbonation for 1 and 24 h. Fractal dimensions, ranging from 2.60159 to 3.86742, indicated increased pore complexity with extended carbonation exposure. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were employed to characterize pore features, including volume, surface area, and diameter. A Menger sponge-based fractal model was applied to compute the fractal dimensions and investigate their relationships with microstructural parameters and mechanical performance. Results showed that prolonged carbonation markedly reduced macropores and large capillary pores, enhanced fine pore content, and improved overall pore connectivity. Fractal analysis revealed that Segments I and IV exhibited the most significant fractal characteristics. The fractal dimension demonstrated exponential correlations with pore diameter; quadratic relationships—with superior statistical performance—with porosity, surface area, and pore volume; and a power–law relationship with compressive strength. These findings highlight the potential of fractal parameters as effective indicators of pore structure complexity and mechanical performance. This study offers a quantitative basis for optimizing pore structure in recycled cementitious materials, promoting their sustainable application in construction. Full article
(This article belongs to the Special Issue Advanced Cementitious Materials: Integrating Nanotechnology, Sustainability, and Intelligent Design)
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21 pages, 1507 KiB  
Article
Assessment of the Impact of Renewable Energy Sources and Clean Coal Technologies on the Stability of Energy Systems in Poland and Sweden
by Aurelia Rybak, Aleksandra Rybak, Jarosław Joostberens and Spas D. Kolev
Energies 2025, 18(16), 4377; https://doi.org/10.3390/en18164377 (registering DOI) - 17 Aug 2025
Abstract
Implementing the provisions related to energy transition, decarbonization, and, thus, the implementation of the Green Deal in the European Union requires increasing the share of renewable energy sources in the energy generation mix. On the one hand, this approach enables the acquisition of [...] Read more.
Implementing the provisions related to energy transition, decarbonization, and, thus, the implementation of the Green Deal in the European Union requires increasing the share of renewable energy sources in the energy generation mix. On the one hand, this approach enables the acquisition of clean energy, but, on the other hand, it can affect the stability of energy supply to consumers in terms of the time and quantity required. Therefore, in the presented research, the authors proposed and verified the following thesis: Innovative coal technologies can play a temporary but crucial role in building the stability of the energy system by developing an operational stability index for the energy system in Poland. To this end, they determined the energy system stability index (ESSI) level, verified its variability over time, and simulated changes in the index when clean coal technology was used. The proposed method is highly universal and can be applied to any country, and the program written specifically for this research fully automates the ESSI calculation process. It is an excellent tool for facilitating decision making and enables the creation of simulations and scenarios of the impact of potential energy development strategies on its operational stability. The set of indicators developed by the authors characterizes the operational stability of the energy system according to the four-dimensional energy security paradigm. This allows for the consideration of the entire spectrum of operational and structural indicators when analysing the stability of the energy system. The developed ESSI allows for the assessment of the system’s stability in a technical sense, but also its adaptability, power and energy balancing, and, ultimately, its independence. Full article
(This article belongs to the Collection Energy Efficiency and Environmental Issues)
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34 pages, 3909 KiB  
Article
UWB Radar-Based Human Activity Recognition via EWT–Hilbert Spectral Videos and Dual-Path Deep Learning
by Hui-Sup Cho and Young-Jin Park
Electronics 2025, 14(16), 3264; https://doi.org/10.3390/electronics14163264 (registering DOI) - 17 Aug 2025
Abstract
Ultrawideband (UWB) radar has emerged as a compelling solution for noncontact human activity recognition. This study proposes a novel framework that leverages adaptive signal decomposition and video-based deep learning to classify human motions with high accuracy using a single UWB radar. The raw [...] Read more.
Ultrawideband (UWB) radar has emerged as a compelling solution for noncontact human activity recognition. This study proposes a novel framework that leverages adaptive signal decomposition and video-based deep learning to classify human motions with high accuracy using a single UWB radar. The raw radar signals were processed by empirical wavelet transform (EWT) to isolate the dominant frequency components in a data-driven manner. These components were further analyzed using the Hilbert transform to produce time–frequency spectra that capture motion-specific signatures through subtle phase variations. Instead of treating each spectrum as an isolated image, the resulting sequence was organized into a temporally coherent video, capturing spatial and temporal motion dynamics. The video data were used to train the SlowFast network—a dual-path deep learning model optimized for video-based action recognition. The proposed system achieved an average classification accuracy exceeding 99% across five representative human actions. The experimental results confirmed that the EWT–Hilbert-based preprocessing enhanced feature distinctiveness, while the SlowFast architecture enabled efficient and accurate learning of motion patterns. The proposed framework is intuitive, computationally efficient, and scalable, demonstrating strong potential for deployment in real-world scenarios such as smart healthcare, ambient-assisted living, and privacy-sensitive surveillance environments. Full article
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16 pages, 4752 KiB  
Article
An Adaptive Projection Differential Dynamic Programming Method for Control Constrained Trajectory Optimization
by Zhehao Xia and Yizhong Wu
Mathematics 2025, 13(16), 2637; https://doi.org/10.3390/math13162637 (registering DOI) - 17 Aug 2025
Abstract
To address the issue of missing constraints on control variables in the trajectory optimization problem of the differential dynamic programming (DDP) method, the adaptive projection differential dynamic programming (AP-DDP) method is proposed. The core of the AP-DDP method is to introduce adaptive relaxation [...] Read more.
To address the issue of missing constraints on control variables in the trajectory optimization problem of the differential dynamic programming (DDP) method, the adaptive projection differential dynamic programming (AP-DDP) method is proposed. The core of the AP-DDP method is to introduce adaptive relaxation coefficients to dynamically adjust the smoothness of the projection function and to effectively solve the gradient disappearance problem that may occur when the control variable is close to the constraint boundary. Additionally, the iterative strategy of the relaxation coefficient accelerates the search for a feasible solution in the initial stage, thereby improving the algorithm’s efficiency. When applied to three trajectory optimization problems, compared with similar truncated DDP, projected DDP, and Box-DDP methods, the AP-DDP method found the optimal solution in the shortest computation time, thereby proving the efficiency of the proposed algorithm. While ensuring the iterative process reaches the global optimum, the computing time of the AP-DDP method was reduced by 32.8%, 13.3%, and 18.5%, respectively, in the three examples. Full article
16 pages, 829 KiB  
Article
Evaluating the Efficacy of a Novel Titanium Cage System in ALIF and LLIF: A Retrospective Clinical and Radiographic Analysis
by Ryan W. Turlip, Mert Marcel Dagli, Richard J. Chung, Daksh Chauhan, Richelle J. Kim, Julia Kincaid, Hasan S. Ahmad, Yohannes Ghenbot and Jang Won Yoon
J. Clin. Med. 2025, 14(16), 5814; https://doi.org/10.3390/jcm14165814 (registering DOI) - 17 Aug 2025
Abstract
Background/Objectives: The success of lumbar interbody fusion depends on the implant design and the surgical approach used. This study evaluated the clinical and radiographic outcomes of lateral lumbar interbody fusion (LLIF) and anterior lumbar interbody fusion (ALIF) using a 3D-printed porous titanium [...] Read more.
Background/Objectives: The success of lumbar interbody fusion depends on the implant design and the surgical approach used. This study evaluated the clinical and radiographic outcomes of lateral lumbar interbody fusion (LLIF) and anterior lumbar interbody fusion (ALIF) using a 3D-printed porous titanium interbody cage system. Methods: A retrospective, single-center review of 48 patients treated for degenerative lumbar spine disease was conducted. Patients underwent LLIF, ALIF, or a combination of both using a 3D-printed titanium cage system (J&J MedTech, Raynham, MA, USA). The Oswestry disability index (ODI) and Patient-Reported Outcomes Measurement Information System (PROMIS) metrics were assessed after 6 weeks, 3 months, 6 months, and 12 months. Linear mixed-effects models evaluated the pre- and post-operative differences. Fusion performance and complications were assessed using the Bridwell grading system over 24 months. Results: A total of 78 levels (62 LLIF and 16 ALIF) were analyzed. Fusion rates were 90.3% (56/62) for LLIF levels and 81.3% (13/16) for ALIF levels by the end of 12 months. ODI scores improved significantly after 3 months (MD −13.0, p < 0.001), 6 months (MD −12.3, p < 0.001), and 12 months (MD −14.9, p < 0.001). PROMIS Pain Interference scores improved after 3 months (MD −6.1, p < 0.001), 6 months (MD −3.4, p < 0.001), and 12 months (MD −5.8, p < 0.001). PROMIS Physical Function scores improved after 3 months (MD +3.4, p = 0.032) and 12 months (MD +4.9, p < 0.001). Conclusions: This novel interbody cage demonstrated high fusion rates, significant pain and function improvements, and a favorable safety profile, warranting further comparative studies. Full article
(This article belongs to the Special Issue Clinical Advances in Spinal Neurosurgery)
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16 pages, 367 KiB  
Article
Mental Health Among Spanish Doctoral Students: Relationship Between Anxiety, Depression, Life Satisfaction, and Mentoring
by Virginia Krieger, Cristina Cañete-Massé, Juan Antonio Amador-Campos, Maribel Peró-Cebollero, María Feliu-Torruella, Alba Pérez-González, Adolfo José Jarne-Esparcia, Xavier María Triadó-Ivern and Joan Guàrdia-Olmos
Eur. J. Investig. Health Psychol. Educ. 2025, 15(8), 164; https://doi.org/10.3390/ejihpe15080164 (registering DOI) - 17 Aug 2025
Abstract
Background: Mental health issues among PhD students are rising, a trend believed to be driven by academic and social challenges. Method: A total of 1265 doctorate students from a large university in Barcelona, Spain (739 women; 414 men; 112 marked other options), with [...] Read more.
Background: Mental health issues among PhD students are rising, a trend believed to be driven by academic and social challenges. Method: A total of 1265 doctorate students from a large university in Barcelona, Spain (739 women; 414 men; 112 marked other options), with a mean age of 32.36 years (SD = 8.20, range: 23–67), were evaluated by means of standardized instruments. Results: Totals of 40.6% and 46.5% of the sample exceeded the cut-off point for anxiety and depression symptoms, and 57.7% for life satisfaction. The proportion of females exceeding the cut-off point was significantly higher than that of males for both anxiety (women: 43.8%, men: 34.5%) and depression (women: 49.3%, men: 39.8%), but not for life satisfaction (women: 57.6%, men: 58.4%). Arts and Humanities PhD students’ disciplines reported higher anxiety and depression scores than those in Social Sciences, Experimental Sciences and Mathematics, and Health Sciences, respectively, while Social Sciences students showed higher life satisfaction and mentoring support than the other groups. Depression scores were significant predictors of life satisfaction across all doctoral programs. Conclusions: These findings highlight the importance of mentoring in supporting doctoral students’ mental health and life satisfaction and can also inform policies in educational institutions, given that PhD students experiencing psychopathological disorders are at a higher risk of academic failure and dropout. Full article
(This article belongs to the Topic Global Mental Health Trends)
15 pages, 700 KiB  
Article
Promotion of Health-Harming Products on Instagram: Characterizing Strategies Boosting Audience Engagement with Cigar Marketing Messages
by Ganna Kostygina, Hy Tran, Chandler C. Carter and Sherry L. Emery
Int. J. Environ. Res. Public Health 2025, 22(8), 1285; https://doi.org/10.3390/ijerph22081285 (registering DOI) - 17 Aug 2025
Abstract
Social media promotion of harmful products (e.g., combustible tobacco) poses a public health threat. However, strategies that amplify exposure to and engagement with such content remain understudied. This study aims to characterize strategies boosting cigar, little cigar, and cigarillo (CLCC) marketing visibility, referrals, [...] Read more.
Social media promotion of harmful products (e.g., combustible tobacco) poses a public health threat. However, strategies that amplify exposure to and engagement with such content remain understudied. This study aims to characterize strategies boosting cigar, little cigar, and cigarillo (CLCC) marketing visibility, referrals, and engagement on Instagram. Using keyword rules, we collected publicly available CLCC-related Instagram posts from CrowdTangle for a six-year period from August 2016 to October 2021. Posts were categorized as commercial (e.g., posts by tobacco brands or vendors) or organic and were coded for consumer engagement (CE) strategies (e.g., presence of prompts to like/share) using a combination of machine learning methods and human coding. Temporal engagement trends were analyzed using metadata. A total of 320,488 CLCC-related public posts were collected, with 44.6% (n = 142,875) identified as overtly commercial. Of these, 33.5% (n = 47,832) contained CE cues, including discounts and giveaways for tagging peers, liking, commenting, or following CLCC brands and spokesperson/influencers accounts, as well as calls to participate in contests and polls. Overtly commercial CE messages consistently garnered more comments per post and likes per post than non-CE commercial posts. There was a significant upward trend in the rate of comments on CE posts, suggesting growing effectiveness in eliciting user interaction. The proliferation of and high level of engagement with cigar-related promotional messages on Instagram demonstrate the need for public health surveillance and regulation of the evolving strategies promoting CLCC marketing exposure, reach, and engagement on social media. Full article
(This article belongs to the Special Issue Evolving Role of Social Media in Health Communication)
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17 pages, 637 KiB  
Systematic Review
Time Is Bone: Missed Opportunities for Secondary Prevention After a Hip Fracture
by Ioannis I. Daskalakis, Johannes D. Bastian and Theodoros H. Tosounidis
J. Clin. Med. 2025, 14(16), 5816; https://doi.org/10.3390/jcm14165816 (registering DOI) - 17 Aug 2025
Abstract
Background/Objectives: Early evaluation and treatment of osteoporosis following a hip fracture is of paramount importance for secondary fracture prevention. Nevertheless, the extent to which osteoporosis management is documented in studies reporting on operatively treated hip fractures in elderly patients is unclear. This study [...] Read more.
Background/Objectives: Early evaluation and treatment of osteoporosis following a hip fracture is of paramount importance for secondary fracture prevention. Nevertheless, the extent to which osteoporosis management is documented in studies reporting on operatively treated hip fractures in elderly patients is unclear. This study is the first systematic review aiming to investigate and summarize the reporting of osteoporosis management in studies with operatively treated hip fractures in elderly patients. Methods: This systematic review was conducted in compliance with PRISMA guidelines. A comprehensive search within the last decade of PubMed, Embase, Cochrane Library, Web of Science, and Ovid was performed. Studies reporting on operatively treated hip fractures in patients older than 65 years of age were included. Two reviewers independently screened the studies and performed data extraction. A subsequent descriptive synthesis was performed. Results: Eighty-six (86) articles were included in this study. Osteoporosis management was reported in only twelve (12) studies. Only six (6) of them were conducted in institutions with established orthogeriatric care. Conclusions: Osteoporosis management is underreported in studies involving operatively treated hip fracture patients. This reflects a significant gap in the overall reporting of secondary fracture prevention actions. Consequently, we advocate for both (a) clinical vigilance for adherence to best practice related to osteoporosis management after the first hip fracture and reporting of the results and (b) the research focusing on the outcomes of secondary fracture prevention efforts. Full article
(This article belongs to the Special Issue The “Orthogeriatric Fracture Syndrome”—Issues and Perspectives)
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