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23 pages, 5221 KiB  
Article
Digital Twin-Based Prediction and Optimization for Dynamic Supply Chain Management
by Dong-Hun Kim, Goo-Young Kim and Sang Do Noh
Machines 2025, 13(2), 109; https://doi.org/10.3390/machines13020109 (registering DOI) - 29 Jan 2025
Abstract
Manufacturing supply chains are becoming increasingly complex due to geopolitical issues, globalization, and market demand uncertainties. These challenges lead to logistics disruptions, inventory shortages, and interruptions in raw materials and spare parts production, resulting in delayed delivery, reduced market share, and lower customer [...] Read more.
Manufacturing supply chains are becoming increasingly complex due to geopolitical issues, globalization, and market demand uncertainties. These challenges lead to logistics disruptions, inventory shortages, and interruptions in raw materials and spare parts production, resulting in delayed delivery, reduced market share, and lower customer satisfaction. Effective supply chain management is critical for improving operational efficiency and competitiveness. This paper proposes a supply chain digital twin methodology to enhance operational efficiency through real-time monitoring, analysis, and response to disruptions. This methodology defines a supply chain digital twin system architecture and outlines the operational process of digital twin applications. It introduces two key modules: a digital twin module for prediction and monitoring and an optimization module for determining the optimal movement of products. These modules are integrated to align digital simulations with real-world supply chain operations. The proposed approach is validated through a case study of an automobile body production company’s supply chain, demonstrating its effectiveness in reducing inventory and logistics costs while providing countermeasures for abnormal situations. Full article
(This article belongs to the Section Industrial Systems)
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<p>Information flow of supply chain.</p>
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<p>The architecture of the supply chain digital twin.</p>
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<p>Sequence diagram of supply chain digital twin.</p>
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<p>Information model of digital twin module: (<b>a</b>) information model of production simulation; (<b>b</b>) information model of logistics simulation.</p>
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<p>Application scope of optimization module.</p>
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<p>Flowchart of the tabu search algorithm.</p>
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<p>Network and product BOM of target supply chain.</p>
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<p>Supply chain digital twin application: (<b>a</b>) a digital twin application interface; (<b>b</b>) a production simulation model; (<b>c</b>) a supply chain optimization module; (<b>d</b>) a logistics simulation model (S: start location, E: end location).</p>
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<p>Response results of production interruption abnormalities: (<b>a</b>) normal production allocation; (<b>b</b>) reallocation under production disruption.</p>
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<p>Response results of road congestion abnormalities.</p>
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29 pages, 18502 KiB  
Article
Fault Diagnosis of Rolling Bearings Based on Acoustic Signals in Strong Noise Environments
by Hengdi Wang and Jizhan Xie
Appl. Sci. 2025, 15(3), 1389; https://doi.org/10.3390/app15031389 (registering DOI) - 29 Jan 2025
Abstract
Compared to vibration sensors, microphones offer several advantages, including non-contact detection, high sensitivity, low cost, and ease of installation. To address the challenges posed by the complex components and significant interference in rolling bearing sound signals, we proposed a fault diagnosis method for [...] Read more.
Compared to vibration sensors, microphones offer several advantages, including non-contact detection, high sensitivity, low cost, and ease of installation. To address the challenges posed by the complex components and significant interference in rolling bearing sound signals, we proposed a fault diagnosis method for rolling bearing acoustic signals based on Secretary Bird Optimization Algorithm (SBOA)-optimized Feature Mode Decomposition (FMD). Initially, a microphone is utilized to collect sound data while the bearing operates, followed by the application of S-FMD (Secretary Bird Optimization Algorithm-optimized Feature Mode Decomposition) to decompose the sound signal and extract components that may contain fault information related to the bearing. The SBOA is employed to adaptively optimize four influencing parameters of FMD: mode number n, filter length L, frequency band cutting number K, and cycle period m. By minimizing envelope entropy as the objective function, we achieve FMD of the bearing sound signal with the assistance of the SBOA. Additionally, this paper introduces an Integrated Signal Evaluation Index (ISEI) to extract potential bearing failure characteristics from the filtered components. Simulation experiments and test results indicate that, compared to Empirical Mode Decomposition, Complementary Ensemble Empirical Mode Decomposition, fixed-parameter FMD, and adaptive variational mode decomposition methods, the proposed approach more effectively extracts weak characteristic information related to early faults in bearing sound signals. Full article
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<p>Illustration of the FMD algorithm.</p>
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<p>Fitness values convergence curves for selected functions under different optimization methods. (<b>a</b>) Convergence curve of the F1 function; (<b>b</b>) convergence curve of the F2 function; (<b>c</b>) convergence curve of the F3 function; (<b>d</b>) convergence curve of the F4 function.</p>
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<p>Flowchart of sound signal fault diagnosis.</p>
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<p>Simulated signals: (<b>a</b>) shock signal waveform; (<b>b</b>) time domain waveform; (<b>c</b>) spectrogram; (<b>d</b>) envelope spectrum.</p>
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<p>Simulated signals: (<b>a</b>) shock signal waveform; (<b>b</b>) time domain waveform; (<b>c</b>) spectrogram; (<b>d</b>) envelope spectrum.</p>
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<p>Convergence curve of parameter optimized by the SBOA (simulation with inner raceway fault).</p>
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<p>Parameter-optimized FMD results of the signal (simulation inner raceway fault). (<b>a</b>) Time domain diagram of F-IMF1; (<b>b</b>) time domain diagram of F-IMF2; (<b>c</b>) time domain diagram of F-IMF3; (<b>d</b>) time domain diagram of F-IMF4; (<b>e</b>) time domain diagram of F-IMF5.</p>
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<p>Parameter-optimized FMD results of the signal (simulation inner raceway fault). (<b>a</b>) Time domain diagram of F-IMF1; (<b>b</b>) time domain diagram of F-IMF2; (<b>c</b>) time domain diagram of F-IMF3; (<b>d</b>) time domain diagram of F-IMF4; (<b>e</b>) time domain diagram of F-IMF5.</p>
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<p>Feature values of the decomposed modes via S-FMD (simulation with inner raceway fault).</p>
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<p>Envelope spectrum of F-IMF3 decomposed via parameter-optimized FMD (simulation with inner raceway fault).</p>
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<p>RFN, kurtosis, and ISEI of each component after decomposing the signal using each method (simulation with inner raceway fault). (<b>a</b>) The characteristic values for C-VMD’s IMF components; (<b>b</b>) the characteristic values for CEEMD’s IMF components; (<b>c</b>) the characteristic values for fixed-parameter FMD’s IMF components; (<b>d</b>) the characteristic values for EMD’s IMF components.</p>
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<p>Convergence curve of parameters optimized by the CPO algorithm (simulation with inner raceway fault).</p>
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<p>Spectrum of each IMF decomposed via parameter-optimized VMD (simulation with inner raceway fault).</p>
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<p>Envelope spectrum of V-IMF4 decomposed via parameter-optimized VMD (simulation with inner raceway fault).</p>
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<p>Envelope spectrum of F-IMF2 decomposed via fixed-parameter FMD (simulation with inner raceway fault).</p>
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<p>Envelope spectrum of the best IMF after EMD (simulation with inner raceway fault).</p>
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<p>Envelope spectrum of the best IMF after CEEMD (simulation with inner raceway fault).</p>
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<p>Each method decomposes the signal and selects the ISEI and RFN of the best components (simulation with inner raceway fault).</p>
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<p>Time domain diagram with an SNR of −9 dB.</p>
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<p>Time domain diagram with an SNR of −11 dB.</p>
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<p>Envelope spectrum with an SNR of −9 dB.</p>
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<p>Envelope spectrum with an SNR of −11 dB.</p>
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<p>Bearing 7205.</p>
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<p>Rig of bearing 7205.</p>
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<p>Sound sensor location.</p>
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<p>Microphone sensor.</p>
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<p>Structural diagram of the test bench.</p>
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<p>Location of the sound sensor.</p>
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<p>Shell.</p>
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<p>Time domain with incipient inner raceway fault.</p>
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<p>Convergence curve of the SBOA (inner raceway fault).</p>
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<p>Convergence curve of the CPO algorithm (inner raceway fault).</p>
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<p>Envelope spectrum of F-IMF3 decomposed via parameter-optimized FMD (inner raceway fault).</p>
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<p>Envelope spectrum of V-IMF4 decomposed via parameter-optimized VMD (inner raceway fault).</p>
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<p>Time domain with incipient outer raceway fault.</p>
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<p>Convergence curve of the SBOA (outer raceway fault).</p>
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<p>Convergence curve of the CPO algorithm (outer raceway fault).</p>
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<p>Envelope spectrum of F-IMF3 decomposed via parameter-optimized FMD (outer raceway fault).</p>
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<p>Envelope spectrum of V-IMF4 decomposed via parameter-optimized VMD (outer raceway fault).</p>
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<p>Time domain with incipient rolling element fault.</p>
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<p>Convergence curve of the SBOA (rolling element fault).</p>
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<p>Convergence curve of the CPO algorithm (rolling element fault).</p>
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<p>Envelope spectrum of F-IMF2 decomposed via parameter-optimized FMD (rolling element fault).</p>
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<p>Envelope spectrum of V-IMF2 decomposed via parameter-optimized VMD (rolling element fault).</p>
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<p>ISEI value of the optimal component obtained by different methods.</p>
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18 pages, 888 KiB  
Systematic Review
Placebo-Controlled Trials in the Management of Crohn’s Disease: An Umbrella Review of Meta-Analyses
by Richard Silva, José Nunes de Azevedo, Jorge Pereira Machado and Jorge Magalhães Rodrigues
Med. Sci. 2025, 13(1), 12; https://doi.org/10.3390/medsci13010012 (registering DOI) - 29 Jan 2025
Abstract
Introduction: Crohn’s disease is a chronic inflammatory bowel disease characterized by abdominal pain, diarrhea, and other symptoms. It can lead to significant complications and impact patients’ quality of life. Therefore, effective management strategies are essential for improving outcomes. Methods: To assess the efficacy [...] Read more.
Introduction: Crohn’s disease is a chronic inflammatory bowel disease characterized by abdominal pain, diarrhea, and other symptoms. It can lead to significant complications and impact patients’ quality of life. Therefore, effective management strategies are essential for improving outcomes. Methods: To assess the efficacy of the treatments for Crohn’s disease, this umbrella review systematically addresses systematic reviews and meta-analyses on Crohn’s disease management published between 2013 and 2023. The quality of the included studies was assessed using the National Institutes of Health’s quality assessment tool. Results: Sixteen studies were included, evaluating various interventions for the induction and maintenance of remission. These included biologic agents (anti-TNF agents, anti-IL-12/23p40 antibodies, and integrin receptor antagonists), antimetabolites, and corticosteroids. Conclusions: The findings suggest that biologic agents may be promising options for both the induction and maintenance of remission in Crohn’s disease. Antimetabolites and corticosteroids may be effective in certain cases, but their efficacy and safety profiles require further investigation. The included studies varied in quality and sample size. More research is needed to confirm the findings and establish optimal treatment strategies. Moreover, while biologic agents show promise, the optimal management of Crohn’s disease requires further research. A personalized approach considering patient factors and disease characteristics is crucial for optimizing outcomes. Full article
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<p>Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) flowchart.</p>
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20 pages, 4197 KiB  
Article
The Influence of Multisensory Perception on Student Outdoor Comfort in University Campus Design
by Hichem Touhami, Djihed Berkouk, Tallal Abdel Karim Bouzir, Sara Khelil and Mohammed M. Gomaa
Atmosphere 2025, 16(2), 150; https://doi.org/10.3390/atmos16020150 (registering DOI) - 29 Jan 2025
Abstract
The user’s experience is critical in spatial design, particularly in outdoor spaces like university campuses, where the physical environment significantly influences students’ relaxation and stress relief. This study investigates the combined impact of thermal, luminous, and auditory environments on students’ perceptions within recreational [...] Read more.
The user’s experience is critical in spatial design, particularly in outdoor spaces like university campuses, where the physical environment significantly influences students’ relaxation and stress relief. This study investigates the combined impact of thermal, luminous, and auditory environments on students’ perceptions within recreational areas at Bordj Bou Arreridj University Campus. A mixed-method approach combined field surveys and on-site measurements across eleven locations within three distinct spatial configurations. The findings from this study indicate that the auditory environment had the most substantial influence on overall perceptions, surpassing luminous and thermal factors. The open courtyard (Area 1) was perceived as less comfortable due to excessive heat and noise exposure. The shaded zone (Area 2) was identified as the most vulnerable, experiencing significant thermal stress and noise disturbances. In contrast, the secluded patio (Area 3) achieved the highest comfort rating and was perceived as the most cheerful and suitable space. Correlation analysis revealed significant interrelationships between physical and perceptual dimensions, highlighting the critical role of factors such as wind velocity, sky view factor, and illuminance in shaping thermal, luminous, and acoustic perceptions. A fuzzy logic model was developed to predict user perceptions of comfort, suitability, and mood based on measured environmental parameters to address the complexity of multisensory interactions. This study highlights the importance of integrating multisensory evaluations into spatial design to optimize the quality of outdoor environments. Full article
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<p>Case study area: (<b>a</b>) Bordj Bou Arreridj BBA localization, (<b>b</b>) university localization, (<b>c</b>) Bordj Bou Arreridj University.</p>
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<p>Distribution of measurement stations.</p>
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<p>Methodological framework.</p>
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<p>Membership functions: (<b>a</b>) Leq. (<b>b</b>) SVF. (<b>c</b>) Illuminance. (<b>d</b>) PET. (<b>e</b>) tMRT. (<b>f</b>) Participant responses (output).</p>
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<p>Minimum, maximum, and mean of PET, Leq, Lnp, and DGP values compared to the permissible limits.</p>
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<p>Average scores and percentage of semantic difference analysis. (<b>a</b>) First area, (<b>b</b>) second area, and (<b>c</b>) third area.</p>
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<p>Interrelationships network between the main influencer variables.</p>
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21 pages, 5101 KiB  
Article
Insights on the Anti-Inflammatory and Anti-Melanogenic Effects of 2′-Hydroxy-2,6′-dimethoxychalcone in RAW 264.7 and B16F10 Cells
by Sung-Min Bae and Chang-Gu Hyun
Curr. Issues Mol. Biol. 2025, 47(2), 85; https://doi.org/10.3390/cimb47020085 (registering DOI) - 29 Jan 2025
Abstract
Chalcones are recognized for their diverse pharmacological properties, including anti-inflammatory and anti-melanogenic effects. However, studies on 2′-hydroxy-2-methoxychalcone derivatives remain limited. This study investigated the anti-inflammatory and melanin synthesis-inhibitory effects of three derivatives: 2′-hydroxy-2,4-dimethoxychalcone (2,4-DMC), 2′-hydroxy-2,5′-dimethoxychalcone (2,5′-DMC), and 2′-hydroxy-2,6′-dimethoxychalcone (2,6′-DMC). In lipopolysaccharide (LPS)-stimulated RAW [...] Read more.
Chalcones are recognized for their diverse pharmacological properties, including anti-inflammatory and anti-melanogenic effects. However, studies on 2′-hydroxy-2-methoxychalcone derivatives remain limited. This study investigated the anti-inflammatory and melanin synthesis-inhibitory effects of three derivatives: 2′-hydroxy-2,4-dimethoxychalcone (2,4-DMC), 2′-hydroxy-2,5′-dimethoxychalcone (2,5′-DMC), and 2′-hydroxy-2,6′-dimethoxychalcone (2,6′-DMC). In lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages, 2,6′-DMC demonstrated a superior inhibition of nitric oxide (NO) production, pro-inflammatory cytokines, and the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) compared to the other derivatives. A mechanistic analysis revealed that 2,6′-DMC modulates the NF-κB and MAPK signaling pathways to attenuate inflammation. Additionally, 2,6′-DMC exhibited a significant inhibition of α-melanocyte-stimulating hormone (α-MSH)-induced melanin synthesis in B16F10 melanoma cells by downregulating tyrosinase, TRP-1, TRP-2, and MITF expression. This regulation was achieved through the suppression of the Wnt/β-catenin, PI3K/AKT, MAPK, and PKA/CREB pathways. Compared to 2,4-DMC and 2,5′-DMC, 2,6′-DMC’s structural configuration, characterized by methoxy groups at the 2- and 6′-positions, contributed to its enhanced molecular stability and binding affinity, amplifying its inhibitory effects. A primary skin irritation test confirmed that 2,6′-DMC exhibited minimal irritation, demonstrating its safety for dermal applications. These findings suggest that 2,6′-DMC holds promise as a dual-function agent for managing inflammatory conditions and hyperpigmentation-related disorders. Full article
(This article belongs to the Special Issue Molecular Insights into Melanogenesis and Melanoma Development)
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<p>Structure of 2′-hydroxy-2-methoxychalcone derivatives. (<b>a</b>) 2′-hydroxy-2,4-dimethoxychalcone (2,4-DMC), (<b>b</b>) 2′-hydroxy-2,5′-dimethoxychalcone (2,5′-DMC), and (<b>c</b>) 2′-hydroxy-2,6′-dimethoxychalcone (2,6′-DMC).</p>
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<p>The effects of 2′-hydroxy-2-methoxychalcones on cell viability in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with increasing concentrations (2.5, 5, 10, 20, and 40 μM) of 2′-hydroxy-2-methoxychalcone derivatives for 24 h in the presence of 1 μg/mL of LPS. Cell viability was measured using the MTT assay for (<b>a</b>) 2,4-DMC, (<b>b</b>) 2,5′-DMC, and (<b>c</b>) 2,6′-DMC. Data are expressed as mean ± SD from three independent experiments. Statistical significance relative to the untreated control group is indicated as *** <span class="html-italic">p</span> &lt; 0.001.</p>
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<p>The effects of 2′-hydroxy-2-methoxychalcones on nitric oxide (NO) production in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with 2′-hydroxy-2-methoxychalcone derivatives for 24 h following stimulation with 1 μg/mL of LPS. NO production was quantified using the Griess reagent for (<b>a</b>) 2,4-DMC, (<b>b</b>) 2,5′-DMC, and (<b>c</b>) 2,6′-DMC. Data are expressed as mean ± SD from three independent experiments. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the LPS-treated group.</p>
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<p>The effects of 2,6′-DMC on PGE<sub>2</sub> and pro-inflammatory cytokine levels in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with 2,6′-DMC for 24 h following stimulation with 1 μg/mL of LPS. (<b>a</b>) PGE<sub>2</sub> levels, (<b>b</b>) IL-1β levels, (<b>c</b>) IL-6 levels, and (<b>d</b>) TNF-α levels were quantified using an ELISA kit. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and * <span class="html-italic">p</span> &lt; 0.1, ** <span class="html-italic">p</span> &lt; 0.01, and *** <span class="html-italic">p</span> &lt; 0.001 compared to the LPS-treated group.</p>
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<p>The effects of 2,6′-DMC on iNOS and COX-2 protein expression in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with 2,6′-DMC for 24 h following stimulation with 1 μg/mL of LPS. (<b>a</b>) Representative Western blot images showing the expression of iNOS, and COX-2, with β-actin as a loading control. Quantification of (<b>b</b>) iNOS and (<b>c</b>) COX-2 protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the LPS-treated group.</p>
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<p>The effects of 2,6′-DMC on MAPK p38 phosphorylation in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with 2,6′-DMC for 20 min following stimulation with 1 μg/mL of LPS. (<b>a</b>) Representative Western blot images showing the expression of phosphorylated p38 (p-p38), and total p38, with β-actin as a loading control. (<b>b</b>) Quantification of p-p38 protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the LPS-treated group.</p>
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<p>The effects of 2,6′-DMC on IκB-α phosphorylation in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with 2,6′-DMC for 15 min following stimulation with 1 μg/mL of LPS. (<b>a</b>) Representative Western blot images showing the expression of phosphorylated IκB-α (p-IκB-α) with β-actin as a loading control. (<b>b</b>) Quantification of p-IκB-α protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the LPS-treated group.</p>
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<p>The effects of 2,6′-DMC on NF-κB p65 protein expression in LPS-stimulated RAW 264.7 cells. RAW 264.7 cells were treated with 2,6′-DMC for 15 min following stimulation with 1 μg/mL of LPS. (<b>a</b>) Representative Western blot images showing p65 expression in the cytoplasm with β-actin as a loading control. (<b>b</b>) Quantification of p65 protein expression levels in the cytoplasm. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the LPS-treated group.</p>
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<p>The effects of 2′-hydroxy-2-methoxychalcones on cell viability in B16F10 melanoma cells. B16F10 cells were treated with increasing concentrations (2.5, 5, 10, 20, and 40 μM) of 2′-hydroxy-2-methoxychalcone derivatives. Cell viability was assessed using the MTT assay for (<b>a</b>) 2,4-DMC, (<b>b</b>) 2,5′-DMC, and (<b>c</b>) 2,6′-DMC. Data are presented as mean ± SD from three independent experiments. Statistical significance relative to the untreated control group is indicated as ** <span class="html-italic">p</span> &lt; 0.001 and *** <span class="html-italic">p</span> &lt; 0.001.</p>
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<p>The effects of 2′-hydroxy-2-methoxychalcones on melanin content in α-MSH-stimulated B16F10 melanoma cells. B16F10 cells were treated with 2′-hydroxy-2-methoxychalcone derivatives for 72 h following stimulation with α-MSH. Melanin content is displayed as follows: (<b>a</b>) 2,4-DMC, (<b>b</b>) 2,5′-DMC, and (<b>c</b>) 2,6′-DMC. Data are presented as mean ± SD from three independent experiments. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and ** <span class="html-italic">p</span> &lt; 0.01, and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2′-hydroxy-2-methoxychalcones on tyrosinase activity in α-MSH-stimulated B16F10 melanoma cells. B16F10 cells were treated with 2′-hydroxy-2-methoxychalcone derivatives for 72 h following stimulation with α-MSH. Tyrosinase activity is shown in the graphs as follows: (<b>a</b>) 2,4-DMC, (<b>b</b>) 2,5′-DMC, and (<b>c</b>) 2,6′-DMC. Data are presented as mean ± SD from three independent experiments. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and * <span class="html-italic">p</span> &lt; 0.1, ** <span class="html-italic">p</span> &lt; 0.01, and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2,6′-DMC on melanin synthesis enzyme expression in α-MSH-stimulated B16F10 melanoma cells. B16F10 cells were treated with 2,6′-DMC for 24 h following stimulation with α-MSH. (<b>a</b>) Representative Western blot images showing the expression of TRP-1, TRP-2, and TYR, with β-actin as a loading control. Quantification of (<b>b</b>) TRP-1, (<b>c</b>) TRP-2, and (<b>d</b>) TYR protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2,6′-DMC on MITF protein expression in α-MSH-stimulated B16F10 melanoma cells. B16F10 cells were treated with 2,6′-DMC for 24 h following stimulation with α-MSH. (<b>a</b>) Representative Western blot images showing the expression of MITF with β-actin as a loading control. (<b>b</b>) Quantification of MITF protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2,6′-DMC on the Wnt/β-catenin signaling pathway in α-MSH-stimulated B16F10 melanoma cells. B16F10 cells were treated with 2,6′-DMC for 24 h following stimulation with α-MSH. (<b>a</b>) Representative Western blot images showing the expression levels of β-catenin, phosphorylated GSK3β (p-GSK3β), and total GSK3β, with β-actin as a loading control. Quantification of (<b>b</b>) β-catenin and (<b>c</b>) p-GSK3β protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and ** <span class="html-italic">p</span> &lt; 0.01, and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2,6′-DMC on the PI3K/AKT signaling pathway in α-MSH-stimulated B16F10 melanoma cells. B16F10 cells were treated with 2,6′-DMC for 4 h following stimulation with α-MSH. (<b>a</b>) Representative Western blot images showing the expression levels of phosphorylated AKT (p-AKT), and total AKT, with β-actin as a loading control. (<b>b</b>) Quantitative analysis of p-AKT protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2,6′-DMC on the MAPK signaling pathway in α-MSH-stimulated B16F10 cells. B16F10 cells were treated with 2,6′-DMC for 4 h following stimulation with α-MSH. (<b>a</b>) Representative Western blot images showing the expression levels of phosphorylated ERK (p-ERK), total ERK, phosphorylated p38 (p-p38), total p38, phosphorylated JNK (p-JNK), and total JNK, with β-actin as a loading control. Quantitative analysis of (<b>b</b>) p-ERK, (<b>c</b>) p-p38, and (<b>d</b>) p-JNK protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and ** <span class="html-italic">p</span> &lt; 0.01, and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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<p>The effects of 2,6′-DMC on the PKA/CREB signaling pathway in α-MSH-stimulated B16F10 cells. B16F10 cells were treated with 2,6′-DMC for 4 h following stimulation with α-MSH. (<b>a</b>) Representative Western blot images showing the expression levels of phosphorylated PKA (p-PKA), total PKA, phosphorylated CREB (p-CREB), and total CREB, with β-actin as a loading control. Quantitative analysis of (<b>b</b>) p-PKA and (<b>c</b>) p-CREB protein expression levels. Data are presented as mean ± SD of three replicates. Statistical significance is indicated as # <span class="html-italic">p</span> &lt; 0.001 compared to the untreated control group and *** <span class="html-italic">p</span> &lt; 0.001 compared to the α-MSH-treated group.</p>
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12 pages, 607 KiB  
Article
Associations of Clinical Presentation of Coeliac Disease with Comorbidities and Complications: A Retrospective Single-Centre Analysis
by Judit Bajor, Zsófia Vereczkei, Réka Bencs, Enikő Nagy, Míra Zsófia Peresztegi, Ivett Hegedűs, Nelli Farkas, András Tárnok, Nóra Szigeti and Zsolt Szakács
J. Pers. Med. 2025, 15(2), 55; https://doi.org/10.3390/jpm15020055 (registering DOI) - 29 Jan 2025
Abstract
Background: The clinical presentation of coeliac disease (CD) is various and may influence disease course. We aimed to investigate the associations of clinical presentation with comorbidities and disease complications in a cohort of Hungarian coeliac patients. Methods: In this retrospective study, data of [...] Read more.
Background: The clinical presentation of coeliac disease (CD) is various and may influence disease course. We aimed to investigate the associations of clinical presentation with comorbidities and disease complications in a cohort of Hungarian coeliac patients. Methods: In this retrospective study, data of consecutive CD patients were analysed. Clinical presentation (classical vs. non-classical), extraintestinal manifestations and comorbidities (anaemia, metabolic bone disease, dermatitis herpetiformis, IgA deficiency, chromosomal abnormalities, autoimmune diseases and malignancy) were assessed. Student’s t-test (for age at diagnosis) and the Chi-squared test or Fisher’s exact test (for categorical variables) were applied as analyses. Results: A total of 738 patients were included. In classical vs. non-classical comparisons, classical presentation was significantly associated with metabolic bone disease (59 vs. 36%, respectively, p < 0.001), anaemia (47 vs. 38%, respectively, p = 0.027) and malignancy (6 vs. 2%, respectively, p = 0.006); however, autoimmune diseases and dermatitis herpetiformis were more common with non-classical presentation (23 vs. 31%, p = 0.02, and 5 vs. 16%, p = 0.014, respectively). Conclusions: Our findings confirm that clinical presentation is associated with certain comorbidities and complications in CD. More personalised follow-up may be recommended based on clinical presentation. Full article
(This article belongs to the Section Clinical Medicine, Cell, and Organism Physiology)
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<p>Flowchart of study.</p>
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37 pages, 13402 KiB  
Article
Integrated Geotechnical Analysis of Allophanic Volcanic Ash Soils: SDMT and Laboratory Perspectives
by Eddy Fernando Sanchez, Jorge Albuja-Sánchez and Maritza Córdova
Appl. Sci. 2025, 15(3), 1386; https://doi.org/10.3390/app15031386 (registering DOI) - 29 Jan 2025
Abstract
The geological study area is volcano-tectonic in nature. Microscopic observations and mineralogical analyses revealed the presence of allophane and diatom clusters whose mineral compositions coincided with weathered andesites and dacites. Edometric consolidation tests showed a high porosity and a reduction in the void [...] Read more.
The geological study area is volcano-tectonic in nature. Microscopic observations and mineralogical analyses revealed the presence of allophane and diatom clusters whose mineral compositions coincided with weathered andesites and dacites. Edometric consolidation tests showed a high porosity and a reduction in the void ratio by up to five times. These are highly compressible soils with a Cc/Cs ratio of 12 to 15 and a specific gravity (Gs) of 2.4. Low initial bulk density (1.10 Mg/m³), high plasticity, and SUCS (OH) classification are typical of soft soils, with an effective friction angle (ɸ’CD) of 25.5° to 30° and effective cohesion (c’CD) of 11.90 to 47.27 KPa. The shear wave velocity for the first 10 m (Vs10) on average ranged from 78 m/s to 120 m/s, whereas that for the first 30 m (Vs30) was 169 m/s. The permeability, which was calculated indirectly, was between 2 × 10−7 and 3 × 10−8 m/s. With an organic matter content between 5% and 25%, the Caupicho soil is an organic mineral sediment that is not considered peat (non-peat). The results of this study serve as a basis for future analyses of soil dynamics, bearing capacity, and consolidation settlements in the medium and long term in an area of high urban growth in southern Quito, Ecuador. Full article
(This article belongs to the Special Issue Geotechnical Engineering: Principles and Applications)
21 pages, 7401 KiB  
Article
Application of Chia and Flaxseed Meal as an Ingredient of Fermented Vegetable-Based Spreads to Design Their Nutritional Composition and Sensory Quality
by Katarzyna Waszkowiak, Krystyna Szymandera-Buszka, Marcin Kidoń, Joanna Kobus-Cisowska, Anna Brzozowska, Angelika Kowiel, Maciej Jarzębski and Elżbieta Radziejewska-Kubzdela
Foods 2025, 14(3), 438; https://doi.org/10.3390/foods14030438 (registering DOI) - 29 Jan 2025
Abstract
Fermented vegetable spreads could offer an opportunity to diversify the range of plant-based foods. The challenge in developing the spreads is to achieve high quality, including stable consistency, consumer desirability and high nutritional value. The aim was to evaluate the application of chia [...] Read more.
Fermented vegetable spreads could offer an opportunity to diversify the range of plant-based foods. The challenge in developing the spreads is to achieve high quality, including stable consistency, consumer desirability and high nutritional value. The aim was to evaluate the application of chia and flaxseed meal for fermented zucchini-cucumber spread production. The effect on the chemical composition, phenolic compound content, antioxidant activity, and sensory quality of the vegetable spread was evaluated. Its color, viscosity, and microstructure were also analyzed using instrumental methods. The meal addition varied from 4.0 to 14.0%. The spread with meal addition had higher fat, protein, ash, and dietary fiber content than the control. Total free phenolic compound content and antioxidant activity also increased, and chia seed meal impacted the parameters more. On the contrary, flaxseed meal improved more the product’s consumer desirability than chia. Both were effective gelling agents that increased viscosity and enhanced product spreadability, and only flaxseed meal showed a masking ability. Its addition reduced the perception and intensity of the bitter, tart, and sour taste. The spread formula consisting of fermented zucchini and cucumber with 9 to 11.5% flaxseed meal addition was the most recommended to achieve the product with high consumer desirability. Full article
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<p>Soluble (SDF) and insoluble dietary fiber (IDF) content in the fermented vegeta-ble-based spreads with various chia or flaxseed meal additions. Sample codes: as in Table 2. Error bars are the standard deviation of means. For each dietary fiber fraction, bars marked with different letters (dark green—IDF, light green—SDF) are significant-ly different (one-way ANOVA, Tukey HSD test at α = 0.05).</p>
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<p>Antioxidant activity of the fermented vegetable-based spreads with various chia or flaxseed meal additions. (<b>A</b>) ABTS assay results (<b>B</b>) FRAP assay result. Sample codes: as in <a href="#foods-14-00438-t002" class="html-table">Table 2</a>. Error bars are the standard deviation of means. Bars marked with different letters are significantly different (one-way ANOVA, Tukey test at α = 0.05).</p>
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<p>Microscopic images of the fermented vegetable-based spreads: Control ((<b>A</b>,<b>B</b>) stereoscopic microscope, (<b>C</b>) inverted microscope, (<b>D</b>) inverted microscope 2.5D image); C 9% sample ((<b>E</b>,<b>F</b>) stereoscopic microscope, (<b>G</b>) inverted microscope, (<b>H</b>) inverted microscope 2.5D image); and F 9% sample ((<b>I</b>,<b>J</b>) stereoscopic microscope, (<b>K</b>) inverted microscope, (<b>L</b>) inverted microscope 2.5D image).</p>
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<p>Sensory evaluation of the fermented vegetable-based spreads with various chia or flaxseed meal additions. (<b>A</b>) Box plot diagram of product attribute desirability scores in consumer analysis (<b>B</b>) Box plot diagram of the color, taste, and consistency descriptor intensity in sensory profiling analysis.</p>
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19 pages, 1087 KiB  
Article
Drifting Past Policy Coherence? Rhetoric and Realities of the Mexican Sembrando Vida Program’s Sustainability Goals
by Sofia Mardero, Birgit Schmook, Sophie Calmé, Grecia Casanova and Rehema M. White
Land 2025, 14(2), 278; https://doi.org/10.3390/land14020278 (registering DOI) - 29 Jan 2025
Abstract
Global and interconnected sustainability challenges require systems thinking and policy coherence to support bold and coordinated action. To chart a course for action, the UN Sustainable Development Goals (SDGs) provide a suite of targets across international and national levels. Here, we explore intentions [...] Read more.
Global and interconnected sustainability challenges require systems thinking and policy coherence to support bold and coordinated action. To chart a course for action, the UN Sustainable Development Goals (SDGs) provide a suite of targets across international and national levels. Here, we explore intentions and contributions over time of the Mexican multifaceted rural-development program Sembrando Vida (SV) to the SDGs, to assess its policy coherence for sustainable development, especially in relation to climate change. We reviewed online documents and newspaper articles, interviewed key SV staff and analyzed the Mexican President’s morning conference speeches. We show that multiplicity and adaptation of stated intentions suggest opportunistic forms of policy drift with limited policy coherence. The potential of the SV program remains promising, but it requires clearer objectives, coherent strategy, expert knowledge, community support and evaluation. These results demonstrate how political context can cause policy drift and negatively impact intended policy coherence for sustainable development. Full article
(This article belongs to the Special Issue The Role Played by Agriculture in Inland Areas)
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<p>Timeline from the first proposal of the SV program until 2023, its fifth year of implementation, derived from data from key informant interviews, media analysis and document analysis.</p>
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<p><span class="html-italic">Sembrando Vida</span> contributions to the SDGs, based on the official discourse of the Government of Mexico, as found at <a href="http://www.gob.mx" target="_blank">www.gob.mx</a>, in the article “Secretaría de Bienestar refrenda su compromiso con la Agenda 2030” (Accessed on 17 March 2022), on the official Facebook pages <a href="https://www.facebook.com/bienestar.mx" target="_blank">https://www.facebook.com/bienestar.mx</a> (Accessed on 17 February 2022) and <a href="https://www.facebook.com/Agenda2030MX" target="_blank">https://www.facebook.com/Agenda2030MX</a> (Accessed on 30 January 2024) [Figure drawn from the official representation of the SDGs on UN documents and webpages].</p>
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31 pages, 1489 KiB  
Article
Quantum-Inspired Sliding-Mode Control to Enhance the Precision and Energy Efficiency of an Articulated Industrial Robotic Arm
by Mehdi Fazilat and Nadjet Zioui
Robotics 2025, 14(2), 14; https://doi.org/10.3390/robotics14020014 (registering DOI) - 29 Jan 2025
Abstract
Maintaining precise and robust control in robotic systems, particularly those with nonlinear dynamics and external disturbances, is a significant challenge in robotics. Sliding-mode control (SMC) is a widely used technique to tackle these issues; however, it is plagued by chattering and computational complexity, [...] Read more.
Maintaining precise and robust control in robotic systems, particularly those with nonlinear dynamics and external disturbances, is a significant challenge in robotics. Sliding-mode control (SMC) is a widely used technique to tackle these issues; however, it is plagued by chattering and computational complexity, which limit its effectiveness in high-precision environments. This study aims to develop and assess a quantum-inspired sliding-mode control (QSMC) strategy to enhance the SMC’s robustness, precision, and computational efficiency, specifically in controlling a six-jointed articulated robotic arm. The methodology involves creating a comprehensive kinematic and dynamic model of the robot, followed by implementing both classic SMC and the proposed Q-SMC in a comparative way. The simulation results confirm that the Q-SMC method outperforms the classic SMC, particularly in reducing chattering, improving tracking accuracy, and decreasing energy consumption by approximately 3.79%. These findings suggest that the Q-SMC technique provides a promising alternative to classical control methods, with potential applications in tasks requiring high precision and efficient robotic manipulations. Full article
(This article belongs to the Special Issue Adaptive and Nonlinear Control of Robotics)
14 pages, 1179 KiB  
Article
Design of a Multi-Node Data Acquisition System for Logging-While-Drilling Acoustic Logging Instruments Based on FPGA
by Zhenyu Qin, Junqiang Lu, Baiyong Men, Shijie Wei and Jiakang Pan
Sensors 2025, 25(3), 808; https://doi.org/10.3390/s25030808 (registering DOI) - 29 Jan 2025
Abstract
The logging-while-drilling (LWD) acoustic logging instrument is pivotal in unconventional oil and gas exploration, and in providing real-time assessments of subsurface formations. The acquisition system, a core component of the LWD acoustic logging suite, is tasked with capturing, transmitting, and processing acoustic signals [...] Read more.
The logging-while-drilling (LWD) acoustic logging instrument is pivotal in unconventional oil and gas exploration, and in providing real-time assessments of subsurface formations. The acquisition system, a core component of the LWD acoustic logging suite, is tasked with capturing, transmitting, and processing acoustic signals from the formation, which directly affects the accuracy and timeliness of the logging data. Recognizing the constraints of current LWD acquisition systems, including limited data collection capabilities and inadequate precision, this study introduces an FPGA-based multi-node data acquisition system for LWD acoustic logging. This system increases sampling density and data accuracy, leading to a more comprehensive collection of formation information. The multi-node acquisition system is composed primarily of a main control circuit board and several acquisition circuit boards, all connected via an RS485 bus. The Field-Programmable Gate Array (FPGA) is utilized to develop the acquisition circuit board’s firmware, offering adjustable control over parameters, such as the AD7380’s operational mode, sampling rate, and depth, facilitating real-time and concurrent acquisition and storage of formation acoustic signals. The main control board communicates with the acquisition boards via the RS485 bus, issuing commands to enable autonomous data collection and transfer from each board, thus enhancing the system’s reliability and scalability. Experimental results confirm the system’s capacity to efficiently capture waveform signals and upload them in real-time, underscoring its dependability and timeliness. The findings suggest that the system is capable of high-speed, real-time acquisition and processing of acoustic signals, offering robust technical support for the continued application of LWD acoustic logging instruments. Full article
(This article belongs to the Special Issue Applications of Sensors Based on Embedded Systems)
17 pages, 1448 KiB  
Article
Fit for What Purpose? NER Certification of Automatic Captions in English and Spanish
by Pablo Romero-Fresco and Yanou Van Gauwbergen
Appl. Sci. 2025, 15(3), 1387; https://doi.org/10.3390/app15031387 (registering DOI) - 29 Jan 2025
Abstract
As human and fully automatic live captioning methods coexist and compete against one another, quality analyses and certification become essential. A case in point is LiRICS, the Live Respeaking International Certification Standard created by the Galician Observatory for Media Accessibility (GALMA) to help [...] Read more.
As human and fully automatic live captioning methods coexist and compete against one another, quality analyses and certification become essential. A case in point is LiRICS, the Live Respeaking International Certification Standard created by the Galician Observatory for Media Accessibility (GALMA) to help maintain high international standards in the live captioning profession. Until now, this certification had only been used to assess human captioners. In this paper, it is applied for the first time to automatic captioning (more specifically to Lexi, the automatic software used by the leading captioning company AI-Media) in order to ascertain whether automatic captions have reached an accuracy level that can match that of human captions. After presenting the materials and the methods (NER model), the paper reports on the results of the analysis of Lexi’s English and Spanish automatic captions. With average accuracy rates of 98.56% in English and 98.26% in Spanish, these captions often manage to reach human levels of quality, except when applied to colloquial content featuring several speakers. A final discussion is devoted to a reflection on how automatic and human live captions can coexist as long as the different purposes they serve are considered, namely the access in bulk provided by automatic captions and the curated access offered by human captions. Full article
(This article belongs to the Special Issue Computational Linguistics: From Text to Speech Technologies)
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<p>Formula used by the NER model to calculate accuracy.</p>
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<p>Bar graph of NER accuracy rate scores with assessment of speaker IDs and without assessment of speaker IDs for English (in red) and Spanish subtitles (in blue).</p>
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<p>Caption to Transcription Continuum for live captioning.</p>
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<p>Classification of live captions along the Caption to Transcription Continuum.</p>
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23 pages, 8693 KiB  
Article
DNA-Binding Activities of KSHV DNA Polymerase Processivity Factor (PF-8) Complexes
by Jennifer Kneas Travis, Megan Martin and Lindsey M. Costantini
Viruses 2025, 17(2), 190; https://doi.org/10.3390/v17020190 (registering DOI) - 29 Jan 2025
Abstract
Kaposi’s Sarcoma Herpesvirus (KSHV) is the causative agent of several human diseases. There are few effective treatments available to treat infection and KSHV oncogenesis. Disrupting the KSHV infectious cycle would diminish the viral spread. The KSHV lytic phase and production of new virions [...] Read more.
Kaposi’s Sarcoma Herpesvirus (KSHV) is the causative agent of several human diseases. There are few effective treatments available to treat infection and KSHV oncogenesis. Disrupting the KSHV infectious cycle would diminish the viral spread. The KSHV lytic phase and production of new virions require efficient copying and packaging of the KSHV genome. KSHV encodes its own lytic DNA replication machinery, including the processivity factor (PF-8), which presents itself as an attractive target for antiviral development. We characterized PF-8 at the single molecule level using transmission electron microscopy to identify key molecular interactions that mediate viral DNA replication initiation. Our results indicate that PF-8 forms oligomeric ring structures (tetramer, hexamer, and/or dodecamer) similar to the related Epstein–Barr virus processivity factor (BMRF1). Our DNA positional mapping revealed high-frequency binding locations of PF-8 within the lytic origin of replication (OriLyt). A multi-variable analysis of PF-8 DNA-binding activity with three mutant OriLyts provides new insights into the mechanisms that PF-8 associates with viral DNA and complexes to form multi-ring-like structures. Collectively, these data enhance the mechanistic understanding of the molecular interactions (protein–protein and protein-DNA) of an essential KSHV DNA replication protein. Full article
(This article belongs to the Special Issue Molecular and Cellular Biology of Human Oncogenic Viruses)
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14 pages, 621 KiB  
Article
“One Size Doesn’t Fit All”: Design Considerations for an Exercise Program to Improve Physical Function in Older Veterans with Serious Mental Illness
by Julia Browne, Whitney L. Mills, Courtney T. Lopez, Noah S. Philip, Katherine S. Hall, Alexander S. Young, Kate M. Guthrie and Wen-Chih Wu
Int. J. Environ. Res. Public Health 2025, 22(2), 191; https://doi.org/10.3390/ijerph22020191 (registering DOI) - 29 Jan 2025
Abstract
Older adults with serious mental illness (SMI) (i.e., schizophrenia, schizoaffective disorder, bipolar disorder) have compromised physical function that adversely affects their quality of life. Exercise is an effective intervention to improve function in older persons; however, older people with SMI experience barriers to [...] Read more.
Older adults with serious mental illness (SMI) (i.e., schizophrenia, schizoaffective disorder, bipolar disorder) have compromised physical function that adversely affects their quality of life. Exercise is an effective intervention to improve function in older persons; however, older people with SMI experience barriers to exercise engagement. This study sought to obtain feedback on an exercise program in development for older people with SMI that comprised home-based exercise delivery, individualized exercise prescription, and motivational health coaching calls. Individual interviews and focus groups were conducted with older Veterans with SMI (n = 3) and clinical staff serving this population (directors: n = 3; clinicians: n = 15, k = 3) to elicit feedback on the perceived feasibility and acceptability of the preliminary program and recommendations for modifications to the program. Rapid analysis was used to summarize transcripts of audio-recorded interviews and focus groups. Results indicated a strong perceived feasibility and acceptability of the preliminary intervention because of how the individualized exercise prescription component (i.e., exercise plan) would be personalized to the Veteran’s preferences and abilities. Clinical staff participants expressed concerns about how the lack of real-time supervision would negatively affect exercise completion. Participants recommended tailoring the home-based exercise delivery and motivational health coaching calls components to each Veteran’s unique context. Full article
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<p>Preliminary exercise program components.</p>
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23 pages, 735 KiB  
Review
Therapeutic Potential of Experimental Stereotactic Hippocampal Cell Transplant in the Management of Alzheimer’s Disease
by Loredana Mariana Agavriloaei, Bogdan Florin Iliescu, Robert Mihai Pintilie and Dana Mihaela Turliuc
J. Clin. Med. 2025, 14(3), 891; https://doi.org/10.3390/jcm14030891 (registering DOI) - 29 Jan 2025
Abstract
Due to a continuous increase in life expectancy and the progress made in specialized healthcare, the incidence of Alzheimer’s disease (AD) has dramatically increased to the point that it has become one of the main challenges of contemporary medicine. Despite a huge scientific [...] Read more.
Due to a continuous increase in life expectancy and the progress made in specialized healthcare, the incidence of Alzheimer’s disease (AD) has dramatically increased to the point that it has become one of the main challenges of contemporary medicine. Despite a huge scientific and clinical effort, current treatments manage just a temporary alleviation of symptomatology but offer no cure. Modern trials involving cell transplantation in experimental animals require the involvement of neurosurgeons in the treatment protocol. CSF shunting, intraventricular infusions, or DBS for symptoms relief have been an integral part of the therapeutic arsenal from the very beginning. The development of stereotactic surgery has facilitated the experimental potential of cell transplantation in the hippocampus for Alzheimer’s disease. We conducted a narrative review of the literature in the top three medical databases (PubMed, Science Direct, and Google Scholar) using the keywords “Alzheimer’s disease”, “hippocampus”, and “transplant”. After eliminating duplicates, 241 papers were selected and screened by title and abstract. Two reviewers independently analyzed the 88 papers and chose 32 experiments that involved stereotactic hippocampal transplantation of cells in experimental animals with AD. The stereotactic transplantation of cells such as mesenchymal stem cells (MSCs), neuronal stem cells (NSCs), induced pluripotent cells (iPSCs), astrocytes, and derivates from stem cells was analyzed. The experiments used either a chemically induced or transgenic AD model and observed the impact of the stereotactic transplantation with behavioral testing, MRS spectroscopy, and biochemical analysis. The stereotaxic method delivers minimal invasive treatment option by cell transplantation at the hippocampus. The results showed that amyloid deposits were lower after transplantation, showing a positive impact. Other impactful results involve proliferation of neurogenesis, downregulation of anti-inflammatory response, and increased neuronal plasticity. The increased precision with which the stereotaxic method manages to target deep structures of the brain and the results of the reviewed papers could represent an argument for future human trials. More studies are needed to confirm the viability of the transplanted cells and the long-term effects. Full article
(This article belongs to the Section Clinical Neurology)
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<p>The trend of scientific publications relevant to the narrative review with a growth in 2010 and a spike in 2015.</p>
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<p>Animal models that were used by reviewed papers and the number of papers that included that type of AD model.</p>
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