Scientific Reports最新文献

{"title":"Study on variation characteristics of shear strength of deep-sea sediments in the South China sea under thermo-hydraulic coupling.","authors":"Yan Feng, Qiunan Chen, Lihai Wu, Jinhu Tang, Guangping Liu, Zengliang Wang, Wei Hu, Bingchu Chen, Shunkai Liu","doi":"10.1038/s41598-025-19493-7","DOIUrl":"https://doi.org/10.1038/s41598-025-19493-7","url":null,"abstract":"<p><p>To investigate the mechanical response mechanisms of deep-sea sediments in the South China Sea under coupled field effects, this study systematically analyzed the influence of moisture content (15%-35%), temperature (4℃-60℃), and confining pressure (100-300 kPa) on their undrained shear strength through triaxial shear tests. A thermohydraulic-coupled model was developed. Results indicate that increased moisture content significantly reduces shear strength: at low confining pressures, strength decreases by 50% across 15%-35% moisture content ranges, while high confining pressures reduce the decrease to 30% by enhancing particle confinement. Temperature elevation accelerates cement softening and particle thermal motion, causing cohesion to drop from 17.6 kPa to 10.9 kPa and internal friction angle from 23.8° to 16.7°. Although confining pressure enhances strength, it cannot reverse cement failure caused by high temperatures. The improved thermohydraulic-coupled model, incorporating moisture content sensitivity coefficient (m) and temperature sensitivity coefficient (n), achieves precise stress-strain relationship predictions under coupled field effects (correlation coefficient R²> 0.97). These findings provide quantitative theoretical support for assessing engineering stability and risk management in resource development of deep-sea areas in the South China Sea.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35512"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Independent pathfinding with collision avoidance for visually impaired individuals.","authors":"Tadeh Ghahremanians, Hossein Mahvash Mohammadi","doi":"10.1038/s41598-025-19387-8","DOIUrl":"https://doi.org/10.1038/s41598-025-19387-8","url":null,"abstract":"<p><p>Computer vision tasks such as image segmentation, object detection, and face recognition have been crucial in developing assistance systems for visually impaired individuals. Among these, image segmentation plays a vital role in helping them navigate safely. However, this task is more complex as it requires detailed spatial information. In this article, we propose a novel panoptic segmentation framework that serves as the foundation for an effective pathfinding system, combining robust collision avoidance with high performance. Our contribution includes a single-stage instance segmentation method built on a ResNet101-FPN encoder-decoder architecture. Additionally, we created a customized panoptic labeled dataset to meet the specific needs of visually impaired individuals, aiming to support future integration with real-time feedback in visual prostheses. We evaluate our model both qualitatively and quantitatively using the Panoptic Quality (PQ) metric. Results show that our method surpasses recent panoptic segmentation techniques, achieving a PQ score 4.092 points higher. It also outperforms existing pathfinding systems, demonstrating greater accuracy and efficiency under varied weather conditions.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35441"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integration of frequency selective surfaces with MIMO antennas for enhanced performance in IoT and V2V communication systems.","authors":"Ikram Troudi, Chokri Baccouch, Belgacem Chibani, Ahmed Zouinkhi, Aymen Flah, Claude Ziad El-Bayeh, Habib Kraiem, Monia Oueder","doi":"10.1038/s41598-025-19483-9","DOIUrl":"https://doi.org/10.1038/s41598-025-19483-9","url":null,"abstract":"<p><p>This research explores the integration of Frequency Selective Surfaces (FSS) with Multiple-Input Multiple-Output (MIMO) antennas to enhance communication performance in Internet of Things (IoT) and Vehicle-to-Vehicle (V2V) applications operating at 5.9 GHz. Unlike existing Literature where various FSS structures are employed for performance improvement, this study presents An innovative approach by integrating a decagonal FSS unit cell with a dug-hex microstrip antenna design. The key contributions of this work include significant performance improvements, such as a gain enhancement from 1.46 dB to 6.42 dB for the single-port antenna (32 mm × 24 mm × 1.6 mm), efficiency exceeding 87.45%, And a bandwidth of 738.86 MHz. For the quad-element MIMO antenna (50 mm × 50 mm × 1.6 mm), the FSS integration results in a gain increase from 2.7 dBi to 7.4 dBi across all ports, while also improving frequency selectivity and port isolation. Notably, the MIMO antenna already exhibits good isolation between ports without FSS integration. Experimental validation confirms that the simulated and measured results align closely, demonstrating the effectiveness of the FSS-MIMO integration. This work not only highlights the potential of FSS technology for enhancing antenna performance in IoT and V2V communications but also introduces a novel, compact design that offers significant improvements in gain, efficiency, and bandwidth. The proposed approach is particularly suited for space-constrained environments, providing a valuable contribution to the development of more efficient and robust wireless communication systems, particularly for IoT networks and safer transportation systems.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35545"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical application research on the titanium metal metatarsal prosthesis designed through FEA and manufactured by 3D printing.","authors":"Chao Wu, Danwei Shen, Binwei Qin, Jiayan Deng, Haigang Hu, Xiangyu Wang, Lian Xu, Hong Li, Taicong Yang","doi":"10.1038/s41598-025-19302-1","DOIUrl":"https://doi.org/10.1038/s41598-025-19302-1","url":null,"abstract":"<p><p>exploring the therapeutic efficacy of a 3D-printed multiple microporous titanium metatarsal and polyethylene sesamoid prosthesis based on finite element analysis. A patient with defect in the first metatarsal was enrolled. A digital model of the first metatarsal and medial cuneus prosthesis was designed from the contralateral images and the relevant anatomical parameters measured in the preoperative period (Model A). Model B was obtained by finite element analysis and iterative optimization of Model A. Model A and Model B designed with a microporous, an insertion structure for bone ingrowth and fusion, and a polyethylene sesamoid for limb weight-bearing. The object A and object B, made from titanium, were generated by 3D printing. The polyethylene sesamoid was manufactured by computerized numerical control technology. The prosthesis consist of object B and polyethylene sesamoid was implanted into the patient. The clinical parameters were evaluated. The maximum displacements of Model A and Model B were 0.031 mm and 0.019 mm. the deviation of the stress results was controlled within 5% between Model A and Model B. The object A with 63% weighed object B. There is significant difference for pressure in M1 and M5 area between bilateral foot. The AOFAS score was 48 before surgery and 88 after 15 months of surgery. The VAS score of before surgery, after 15 months of surgery and after 27 months of surgery was 7, 2 and 1, respectively. The lightweight and microporous design based on finite element analysis for metatarsal prosthesis, and manufactured by titanium and polyethylene can Reconstruct the arch.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35491"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hierarchical clustering approach to movement smoothness and temporal adaptation in rhythmic step aerobics training in middle aged women.","authors":"Yassaman Djafari, Ahmad R Arshi, Hamid Rajabi","doi":"10.1038/s41598-025-19228-8","DOIUrl":"https://doi.org/10.1038/s41598-025-19228-8","url":null,"abstract":"<p><p>This study examined the effects of rhythmic step aerobics on movement smoothness and core dynamics in middle-aged women, focusing on forward and reverse stepping. While step aerobics enhances balance and musculoskeletal function, its impact on kinematics-especially movement smoothness and synchronization-remains underexplored. This study analysed centre of mass motion using inertial measurement units in three dimensions. Nine middle-aged women (age: 53.38 years, BMI: 24.45 [Formula: see text]) completed 24 training sessions, with evaluations every 12 sessions. Step detection was performed using continuous wavelet transform, stance-to-swing ratio assessed temporal adaptation, and jerk cost analysis quantified movement smoothness. Hierarchical clustering (Ward's method) identified motor adaptation patterns. Results showed significant kinematic adaptations, particularly in backward stepping, with increased stance duration and smoother motion. Notably, the third step (first backward step) reflected adaptation, especially from the 12th to 24th sessions, suggesting the central nervous system prioritized this particular step for initial stability. In contrast, no significant adaptation was observed in the fourth step, indicating asymmetry in lower limb trainability. Alternating the leading step every minute may reduce asymmetry. These findings highlight rhythmic step aerobics as a promising intervention for mobility enhancement, with stance-to-swing ratio and smoothness as valid trainability metrics for prehabilitation and rehabilitation programs.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35477"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incidence of diabetic foot ulcer and its predictors among adult diabetes patients in Northern Ethiopia: a retrospective cohort study.","authors":"Yohannes Terefe Ayalew, Behailu Tariku Derseh, Enguday Demeke Gebeyaw, Hailemelekot Bekele Kebede","doi":"10.1038/s41598-025-19253-7","DOIUrl":"https://doi.org/10.1038/s41598-025-19253-7","url":null,"abstract":"","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35466"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological characteristics of spiral tibial shaft fractures involving the distal articular surface: a retrospective observational study.","authors":"Xianjie Ai, Yu Su, Yujie Li, Hongfei Qi, Taotao Ren, Zhimeng Wang, Zhong Li, Bo Wu, Ming Li","doi":"10.1038/s41598-025-19668-2","DOIUrl":"https://doi.org/10.1038/s41598-025-19668-2","url":null,"abstract":"&lt;p&gt;&lt;p&gt;Spiral fractures of the tibial shaft are frequently accompanied by injuries involving the distal articular surface; however, comprehensive investigations into the morphological characteristics of fracture lines extending to the joint surface remain limited. Existing classification systems are insufficient to comprehensively characterize the continuum of injuries spanning from the diaphysis to the articular surface. This study aimed to delineate the extension patterns of spiral tibial shaft fractures toward the distal articular surface, quantify the frequency of involvement across distinct anatomical regions, and characterize their spatial distribution, thereby providing a morphological basis for more precise diagnosis and treatment. A single-center retrospective cohort comprising 160 patients with spiral tibial shaft fractures treated at the Xi'an Jiaotong University Affiliated Honghui Hospital between May 2020 and December 2024 was included. Computed tomography (CT) images were independently screened and assessed by three senior physicians blinded to clinical data, with AO/OTA classification demonstrating excellent inter-rater reliability (κ &gt; 0.80). Among these, 117 cases exhibited involvement of the distal articular surface. Fracture lines were registered onto a standardized tibial template utilizing a processing pipeline integrating Mimics, 3-Matic, NX, AutoCAD, and Origin software, enabling the generation of three-dimensional fracture line distribution maps and heatmaps. Among the 160 cases of spiral tibial shaft fractures, 117 (73.1%) exhibited fracture lines involving the distal articular surface. The specific distribution was as follows: 85 cases (72.6%) involved the posterior malleolus, 46 cases (39.3%) the anterior malleolus, and 29 cases (24.9%) the medial malleolus. Distribution maps revealed that 57 cases (48.7%) involved only the posterior malleolus, 16 cases (13.7%) only the anterior malleolus, and 9 cases (7.7%) only the medial malleolus; 15 cases (12.8%) involved both the posterior and anterior malleoli, 5 cases (4.3%) both the posterior and medial malleoli, and 7 cases (6.0%) both the anterior and medial malleoli. In comparison, 8 cases (6.8%) exhibited involvement of all three regions. Heatmap analysis revealed a highly modular distribution of fracture lines across the distal articular surface. The highest density was observed in the posterior malleolar region, forming an arc-shaped high-density zone. In the anterior malleolar region, two linear high-density bands were primarily located along the margins of the anterior malleolar module and the Chaput tubercle. Fracture lines in the medial malleolus were predominantly concentrated at the junction between the medial malleolar prominence and the articular surface. Spiral tibial shaft fractures frequently extend into the distal articular surface, exhibiting diverse injury patterns that go beyond the traditionally recognized posterior malleolar involvement. Notably, anterior ","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35505"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gene-environment-brain topology reveals clinical subtypes of depression in UK Biobank.","authors":"Emma Tassi, Alessandro Pigoni, Nunzio Turtulici, Federica Colombo, Lidia Fortaner-Uyà, Anna Maria Bianchi, Francesco Benedetti, Chiara Fabbri, Benedetta Vai, Paolo Brambilla, Eleonora Maggioni","doi":"10.1038/s41598-025-19624-0","DOIUrl":"https://doi.org/10.1038/s41598-025-19624-0","url":null,"abstract":"<p><p>Major depressive disorder (MDD) is a leading cause of disability worldwide, affecting over 300 million people and posing a significant burden on healthcare systems. The heterogeneity of MDD can be attributed to diverse etiologic mechanisms. Characterizing MDD subtypes with distinct clinical manifestations could improve patient care through targeted personalized interventions. Topological Data Analysis (TDA) has emerged as a promising tool for identifying homogeneous subgroups of diverse medical conditions and key disease markers. Our study applied TDA to data from a UK Biobank MDD subcohort comprising 3052 samples, leveraging genetic, environmental, and neuroimaging data to assess their differential capability in predicting clinical outcomes in MDD. TDA graphs were built from unimodal and multimodal feature sets and quantitatively compared based on their capability to predict depression severity, physical comorbidities, and treatment response outcomes. Our findings showed a key role of the environment in determining the severity of depressive symptoms. Comorbid medical conditions of MDD were best predicted by brain imaging characteristics, while brain functional patterns resulted in the best predictors of the treatment response profiles. Our results suggest that considering genetic, environmental, and brain characteristics is essential to characterize the heterogeneity of MDD, providing avenues for the definition of robust markers of health outcomes in MDD.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35538"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interactive learning system neural network algorithm optimization.","authors":"Hao Cao, Xingman Yu, Pingping Han, Jun Peng, Deming Li","doi":"10.1038/s41598-025-19436-2","DOIUrl":"https://doi.org/10.1038/s41598-025-19436-2","url":null,"abstract":"<p><p>With the development of artificial intelligence education, the human-computer interaction and human-human interaction in virtual learning communities such as Zhihu and Quora have become research hotspots. This study has optimized the research dimensions of the virtual learning system in colleges and universities based on neural network algorithms and the value of digital intelligence in the humanities. This study aims to improve the efficiency and interactive quality of students' online learning by optimizing the interactive system of virtual learning communities in colleges. Constructed an algorithmic model for a long short-term memory (LSTM) network based on the concept of digital humanities integration. The model uses attention mechanism to improve its ability to comprehend and process question-and-answer (Q&A) content. In addition, student satisfaction with its use was investigated. The Siamese LSTM model with the attention mechanism outperforms other methods when using Word2Vec for embedding and Manhattan distance as a similarity function. The performance of the Siamese LSTM model with the introduction of the attention mechanism improves by 9%. In the evaluation of duplicate question detection on the Quora dataset, our model outperformed the previously established high-performing models, achieving an accuracy of 91.6%. Students expressed greater satisfaction with the updated interactive platform. The model in this study is more suitable than other published models for processing the SemEval Task 1 dataset. Our Q&A system, which implements simple information extraction and a natural language understanding method to answer questions, is highly rated by students.</p>","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35498"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: A systematic algorithm using 16S ribosomal RNA for accurate diagnosis of pneumonia pathogens.","authors":"Ferry Dwi Kurniawan, Dina Alia, Mamoru Shiraishi, Megumi Higo, Yoshiaki Inoue, Koichi Hagiwara","doi":"10.1038/s41598-025-22878-3","DOIUrl":"https://doi.org/10.1038/s41598-025-22878-3","url":null,"abstract":"","PeriodicalId":21811,"journal":{"name":"Scientific Reports","volume":"15 1","pages":"35557"},"PeriodicalIF":3.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145275879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}