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Personality traits have an effect on pain-related psychological variables in patients with chronic low back pain

PLoS ONE Kazuhiro Hayashi, Kenji Miki, Yui Fukushima et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354827

Introduction An association between personality factors and pain experience has been investigated. However, the direct contributions of personality traits by the Maudsley Personality Inventory to clinical pain outcomes in patients with chronic pain remain unclear. The Maudsley Personality Inventory is a self-report questionnaire used to assess extroversion, neurotic tendencies, and lying or exhibitionistic tendencies. The present study aimed to investigate whether personality traits influenced with the pain-related psychological variables in patients with chronic secondary low back pain (CLBP). Methods One hundred fifteen consecutive outpatients with CLBP were included. Personality traits were measured by using the Maudsley Personality Inventory to assess extroversion, neurotic tendencies, and lying or exhibitionistic tendencies. The association of Maudsley neurotic tendency score and pain-related variables was analyzed and then performed a path analysis. Eleven patients (9%) were the biased persons with frequent lying. Results The pain-related variables showed no significant differences between the persons with frequent lying and those with normal. The Maudsley neurotic tendency score was significantly associated with Pain Catastrophizing Scale, Hospital Anxiety and Depression Scale, Pain Self-Efficacy Questionnaire, Athens Insomnia Scale, and EuroQol-5 Dimensions-3 level. The unstandardized coefficients for Maudsley neurotic tendency score were small, compared to pain-Numerical Rating Scale in each outcome. Conclusions These results suggest the presence of neurotic tendency could have an impact on the health outcomes in patients with CLBP, but the impact was small.

Mixed feelings: Unintended consequences of HIV outreach care in Zimbabwe

PLoS ONE Noa Gluskinos, Caroline Maposhere, Ushehwedu Kufakurinani et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354747

Background Decentralization of antiretroviral therapy (ART) brought treatment to millions of people in Sub-Saharan Africa. However, the implications of such decentralization are still not fully understood. Methods The study included 60 semi-structured interviews with community leaders, healthcare providers, patients, and community members served by a rural mission hospital in Zimbabwe, conducted in January-March 2019. Interviews were transcribed and translated into English and coded using an iterative codebook. Coded extracts were grouped into themes and categories, systematically using QDA Miner qualitative analysis software. Findings The study reveals that treatment-for-all policies and decentralization of ART have indeed improved access to care (as experienced by the study participants). However, the study shows that these policies also had unintended negative consequences. Stigma and complex social relations significantly affect the practices and experiences of ART outreach care, for both patients and healthcare providers, and may hamper attempts to reduce stigma as well as increase physical and social barriers to accessing ART. Conclusions The study’s results highlight the need to understand the consequences of the decentralization of HIV care, as well as the barriers and facilitators associated with ART outreach in order to improve quality of care and provide true accessibility to HIV care for all.

Association between COMISA and cardiovascular disease: Evidence from the TURKAPNE registry

PLoS ONE Yüksel Peker, Aylin Pihtili, Esen Kiyan et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354810

Background Comorbid insomnia and obstructive sleep apnea (COMISA) is increasingly recognized as a distinct clinical entity, yet its relationship with cardiovascular disease (CVD) remains incompletely understood. We aimed to investigate the association between COMISA and CVD in a large clinical sleep cohort. Methods Using data from the TURKAPNE registry, we analyzed 12,715 adults referred for sleep evaluation and classified participants into four mutually exclusive sleep phenotypes: neither OSA nor insomnia (n = 910), insomnia only (n = 388), OSA only (n = 8,142), and COMISA (n = 3,275). The prevalence of CVD was compared across groups. Multivariable logistic regression models were used to examine associations between COMISA and CVD after adjustment for age, sex, body mass index, education level, smoking status, airway disease, diabetes mellitus, and psychiatric comorbidity. Results The prevalence of COMISA was higher among individuals with CVD compared with those without CVD (31.6% vs. 22.7%; p < 0.001). In contrast, the distribution of insomnia alone and OSA alone showed only minor differences by CVD status. In multivariable analysis, CVD was independently associated with COMISA (odds ratio 1.108, 95% confidence interval 1.006–1.220; p = 0.038), although the magnitude of this association was modest. Female sex, diabetes, airway disease, psychiatric disease, lower educational status, and current smoking were also independently associated with COMISA. Conclusion In this large registry-based cohort, COMISA was more prevalent among individuals with CVD, supporting the concept that it represents a clinically distinct phenotype with an increased cardiometabolic burden. However, the modest effect size suggests that COMISA is influenced by a broader interplay of behavioral and metabolic factors.

Development and preliminary experimental evaluation of a venturi-based slurry jet erosion test rig for comparative study of ductile and brittle materials

PLoS ONE Karthik S, Sharath B N, Abhishek Agarwal et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0355225

Slurry erosion significantly affects the durability of fluid-handling components in hydroelectric, mining, petroleum, and chemical industries. This study presents the design and preliminary laboratory-scale evaluation of a Venturi-based slurry jet erosion test rig capable of introducing dry erosive particles into a flowing liquid stream without the use of pressurised or vacuum systems. The erosion behaviour of brass (ductile) and cast iron (brittle) was investigated under varying particle sizes, slurry concentrations, and impingement angles using river sand as the erodent. Results showed maximum erosion of brass at 30° due to dominant plastic deformation, whereas cast iron exhibited peak erosion at 90° due to brittle fracture mechanisms. Kinetic energy threshold values required for erosion initiation were estimated for both materials and correlated with experimental observations. Qualitative surface morphology analysis using scanning electron microscopy supported the identification of distinct erosion mechanisms governing the ductile and brittle material responses. The developed apparatus demonstrated reasonably consistent operation and repeatable comparative erosion behaviour under the selected experimental conditions, indicating its suitability for controlled slurry erosion testing and comparative evaluation of ductile and brittle engineering materials without the need for pressurised particle delivery systems.

Crystal structure of a closed ternary complex of a HNA Reverse Transcriptase in complex with a HNA/DNA duplex

PLoS ONE Cédric Gutfreund, Mikhail Abramov, Frédérick Coosemans et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0351418

1,5-Anhydrohexitol nucleic acid (HNA) is a promising xeno nucleic acid (XNA) for applications such as aptamers and catalysts, due to its favourable physico-chemical properties. Realizing this potential requires efficient and high-fidelity polymerases capable of processing HNA. A key component are HNA reverse transcriptases that convert HNA into DNA, an essential step in standard SELEX workflows. Although HNA reverse transcriptases have been generated by directed evolution, structural insight is essential to guide further enzyme engineering. Here, we report the 2.8 Å crystal structure of the engineered HNA reverse transcriptase KOD-H4, derived from the B-family DNA polymerase of Thermococcus kodakarensis , captured in a closed ternary complex with dATP, a 3’-terminated primer and a mixed HNA/DNA template. Compared to a previously reported open ternary KOD-H4 structure, the presented structure adopts a more closed conformation with increased finger and thumb domain closure and formation of a canonical Watson–Crick–Franklin base pair at the insertion site. Direct downstream nucleotides show more distorted base pairing and one HNA residue transits from the unusual 1 C 4 conformation it adopted in the open complex to the 4 C 1 hexitol sugar conformation. These findings demonstrate that KOD-H4 can form a closed, pre-catalytic complex resembling that of the wildtype enzyme with natural substrates, and reveal state-dependent conformational flexibility of HNA. Such flexibility should be considered in the design and optimization of enzymes that process HNA.

DiSCoKit: An open-source toolkit for deploying live LLM experiences in survey research

PLoS ONE Jaime Banks, Jonathan Stromer-Galley, Samiksha Singh et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354904

In scientific studies of human-AI interaction dynamics, researchers often need to present participants with opportunities to interact with live large-language models (LLMs). However, technical and practical challenges (from survey platform limitations and logging chat data to manipulating AI behaviors for experimental designs) often inhibit survey-based deployment of AI stimuli. We developed DiSCoKit—an open-source toolkit for deploying live LLM experiences (e.g., ones based on models delivered through Microsoft Azure portal) through JavaScript-enabled survey platforms (e.g., Qualtrics). We describe the toolkit’s scientific motivation, architecture, and operation. We also offer an example of toolkit deployment and customization, along with discussing its possibilities and limitations. Altogether, DiSCoKit gives researchers a flexible, secure, scalable solution for deploying naturalistic LLM stimulus experiences through online surveys.

It would be really great if I had greater confidence and ability there: Understanding the primary care physician experience with nutrition in training, clinical practice, and interprofessional collaboration

PLoS ONE Caitlin A. Hildebrand, Seema Agrawal, Jaclyn Albin et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354813

Background Primary care physicians (PCPs) are on the front lines of health promotion and disease prevention, yet evidence supports a longstanding gap in physicians’ capacity to counsel about diet, a key factor in patient health and chronic disease risk. Momentum to address the nutrition training needs of physicians is growing; however, challenges PCPs experience due to inadequate training are further complicated by clinical practice barriers. This study seeks to better understand the complex problem PCPs face addressing nutrition with patients to inform potential solutions. Methods and findings This qualitative study takes a design thinking approach to understanding the problem by learning from PCPs about their experience, challenges, and priorities addressing nutrition with patients. Findings from semi-structured interviews with 32 PCPs revealed that while they value nutrition and believe they have an important role in addressing diet with patients, their role as a generalist in addressing nutrition lacks clarity. PCPs describe learning their current approach to nutrition primarily outside of formal medical training, resulting in variability and inconsistency in approaches and recommendations and general frustrations about their ability to give actionable guidance. While registered dietitians (RDs) are often viewed as valuable support for patients, PCPs describe multiple challenges to RD utilization and subsequently at times may be the only ones with the opportunity to address diet with patients. Additional system- and societal-level barriers, such as time limitations and the food environment, further complicate PCPs’ experiences advising patients about nutrition. Main limitations of this study are limited generalizability from recruiting graduates of a single medical school and PCPs with greater interest in nutrition or more frustration with their current approach to nutrition may have been more likely to participate. Conclusions Our results support the need to clearly define a realistic role for PCPs as generalists addressing nutrition. Clarified expectations in turn can inform nutrition training of physicians and guiding frameworks and strategies for giving practical, evidence-based nutrition guidance. PCPs also need increased support through access to resources, strategies to improve RD collaboration, and attention to system- and societal-level challenges influencing dietary interventions in primary care.

Bacterial vaginosis in early pregnancy and birth outcomes: Evidence from a prospective cohort in the middle belt of Ghana

PLoS ONE Dennis Gyasi Konadu, Alex Kwame Owusu-Ofori, David Kwame Dosoo et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354974

Background Bacterial vaginosis (BV) is highly prevalent in women of African origin and has been associated with adverse birth outcomes (ABO), particularly preterm birth (PTB). However, evidence from sub-Saharan Africa remains limited, and while a previous study conducted in this area examined the prevalence of BV, its impact on pregnancy outcomes was not assessed. This study assessed the prevalence and risk factors of BV in early pregnancy and examined its association with ABO in the middle belt of Ghana. Methods This analysis was nested within a prospective cohort of pregnant women in the Kintampo North Municipality and Kintampo South District. Pregnant women <20 weeks’ gestational age were screened, consented, enrolled and followed through delivery until one year after birth. At enrolment, sociodemographic, behavioural, and obstetric data were collected, along with biological samples, including vaginal swabs for Gram staining and Nugent scoring. BV status was categorized as BV-negative (0–6) or BV-positive (7–10) and ABO included PTB (<37 weeks), low birthweight (LBW < 2.5 kg), and foetal loss. Data were double-entered in REDCap and analysed in R. Associations between BV and ABO were assessed using chi-square tests, and logistic regression was used to identify risk factors for BV. Results Of 1,180 pregnant women enrolled, 355 (30.1%) were BV-positive. PTB (9.9% vs. 8.7%; p = 0.50), LBW (13.8% vs. 12.0%; p = 0.39), and foetal loss (4.5% vs. 2.8%; p = 0.14) were all higher among BV-positive women, but none reached statistical significance. Younger age and unmarried status were associated with BV. Unmarried women (AOR 1.63; 95% CI: 1.20–2.22) and those reporting one sexual encounter per week (AOR 1.55; 95% CI: 1.01–2.37) had increased odds of BV. Conclusions BV is highly prevalent in early pregnancy in this Ghanaian cohort, particularly among younger and unmarried women, but was not significantly associated with ABO. Targeted screening among high-risk groups is necessary, and future molecular approaches may better characterise BV subtypes linked to ABO in African settings.

Concordant RNA-protein evidence and human tissue metabolomics prioritize UPP1-associated nucleotide remodeling in prostate cancer

PLoS ONE Xuancai Chen, Wei Su, Qun Zhou et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354354

Prostate cancer (PCa) is characterized by molecular heterogeneity and metabolic reprogramming, but the relationships among transcriptomic, proteomic, and metabolic signals remain incompletely defined. Here, we present a human-centered, cross-dataset analysis of public RNA, protein, and metabolomics data in PCa. We analyzed RNA and protein profiles from PC3 parental and drug-resistant cells together with an independent human matched tissue metabolomics dataset from Metabolomics Workbench (ST000784). RNA-protein overlap analysis identified seven genes that were significant at both layers, including five concordantly upregulated genes: UPP1 , IGF2R , FLNC , DSP , and PLEC . Among these, UPP1 provided the most direct metabolic interpretation because it encodes uridine phosphorylase 1, an enzyme linked to pyrimidine salvage. Independent ST000784 matched prostate tissue metabolomics supported broader nucleotide metabolism remodeling, including significant changes in N-carbamoyl-L-aspartate, guanosine monophosphate, and adenosine 3,5-cyclic monophosphate. In contrast, uracil was not significantly altered and uridine 5’-monophosphate showed only a trend after multiple-testing correction. Repeated stratified cross-validation showed that UPP1-containing candidate gene sets achieved high within-layer AUC values in RNA and protein data, while nested statistical benchmark models also performed strongly. These results prioritize a UPP1-associated nucleotide remodeling hypothesis in PCa, but do not establish causal regulation of metabolite abundance or clinical diagnostic utility. Future matched multi-omics and perturbation experiments are required.

A cross-domain deep learning framework for remaining useful life prediction in industrial applications

PLoS ONE Sudip Saha, Muhammad Arslan Pervaiz, Muhammad Safwat Rahman et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354721

Accurate prediction of Remaining Useful Life (RUL) is critical for predictive maintenance and minimizing downtime in industrial systems. This paper presents a cross-domain deep learning framework based on a hybrid Convolutional Neural Network–Bidirectional Long Short-Term Memory (CNN–BiLSTM) architecture. Unlike domain-specific models that require handcrafted features, the proposed framework extracts local degradation features through CNN layers and captures long-term dependencies via BiLSTM networks. The model is evaluated on three heterogeneous datasets: construction machinery, continuous casting machines, and lithium-ion batteries. Experimental results show that CNN–BiLSTM consistently outperforms baselines, achieving up to 22% lower RMSE compared to GRU and 30–50% lower RMSE compared to traditional models. On the construction dataset, it achieves an MAE of 48.2 hours and RMSE of 67.1 hours ( R 2  = 0.88), outperforming GRU by 20%. For the casting dataset, the model attains an MAE of 87.6 tons and RMSE of 113.9 tons ( R 2  = 0.87), surpassing Random Forest by over 35%. On the battery dataset, CNN–BiLSTM reduces the MAE to 49.6 cycles and RMSE to 72.8 cycles ( R 2  = 0.89), while also achieving the lowest Timeliness Score (27.5) and PHM08 Score (192.4). Cross-domain experiments are evaluated under two settings: zero-shot transfer, where the model is trained on one source domain and directly tested on a different target domain without using labeled target-domain samples, and fine-tuned transfer, where 20% of labeled target-domain samples are used to update only the fully connected layers while keeping the CNN and BiLSTM layers frozen. The zero-shot results reflect the effect of domain shift, while the fine-tuned results show that lightweight transfer adaptation reduces RMSE by 25–40% across domains. These findings indicate cross-domain adaptability under limited target-domain supervision rather than fully unsupervised cross-domain generalization. These results highlight the feasibility of a unified CNN–BiLSTM framework for scalable, cross-domain RUL estimation and its suitability for real-world prognostic applications.

The analgesic effect of ultrasound-guided fascia hydrorelease around the artery for myofascial neck pain: a prospective single-arm interventional study

PLoS ONE Tadanao Hiroki, Hiroaki Kimura, Tadashi Kobayashi et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0350882

Myofascial pain syndrome (MPS) is a major cause of chronic neck pain, with tissue ischemia implicated as a contributing factor. This prospective, single-arm interventional study evaluated the analgesic effect of ultrasound-guided fascia hydrorelease (US-FHR) performed around arteries supplying the neck in patients with chronic neck MPS. Thirteen adults (median age 53.0 years; 38.5% female) underwent US-FHR targeting the perivascular fascia of either the transverse cervical or dorsal scapular artery using 2 mL of normal saline. Pain intensity was assessed by visual analog scale (VAS) at rest and during movement; disability by the 5-item Pain Disability Index, Japanese version (PDI-5-J); and arterial blood flow volume before and after the procedure. The primary outcome, pain VAS during movement, decreased from 49.0 mm (interquartile range [IQR], 44.5–64.0) at baseline to 22.0 mm (IQR, 14.5–31.5) at 15 min and 22.0 mm (IQR, 14.0–34.0) at 1 week (Hodges-Lehmann median difference, 30.5 mm [95% CI, 24.5 to 36.5] and 28.5 mm [95% CI, 18.5 to 37.0]; both P < 0.001). Pain VAS at rest improved from 21.0 mm (IQR, 13.0–43.5) to 8.0 mm at 15 min and 1 week (median difference, 14.5 mm [95% CI, 9.0 to 24.0; P = 0.001] and 13.5 mm [95% CI, 6.0 to 21.0; P = 0.007]). PDI-5-J decreased from 17.0 (IQR, 10.5–23.0) to 13.0 (IQR, 4.0–17.5) at 1 week (median difference, 5 [95% CI, 2–8; P = 0.004]). Blood flow volume increased from 11.2 mL/min (IQR, 4.5–14.4) to 17.2 mL/min (IQR, 6.1–23.7) immediately after US-FHR (median difference, + 4.1 mL/min [95% CI, + 2.5 to +8.9; P = 0.001]), although transient. One patient experienced transient bleeding that was promptly controlled. In this single-arm feasibility study, US-FHR around the target artery was simple and safe to perform and was associated with reduced neck pain. Because the study lacked a control group, these preliminary findings should be regarded as hypothesis-generating and require confirmation in controlled trials; they may also inform the future evaluation of MPS in other anatomical regions. Trial registration: UMIN Clinical Trials Registry, UMIN000053612.

Functional node layout in Metroidvania game worlds: A complex network analysis

PLoS ONE GL(Guanglong) Bao, Beihe Weng, Long Ding et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354705

This study investigates how the spatial structure of Metroidvania game worlds relates to the layout of key functional nodes. Using Hollow Knight, Prince of Persia: The Lost Crown, and Blasphemous 2 as case studies, the maps were transformed into graph structures based on spatial data compiled from gameplay observation, in-game maps, community maps, and verification through gameplay videos. On the basis of this graph representation, the study adapts the Nearest Neighbor Index by replacing Euclidean distance with network shortest-path distance in order to evaluate the distribution patterns of save points, teleport points, and boss points. It further employs multi-source k-hop reachability analysis to measure service coverage and redundancy. Finally, closeness centrality and betweenness centrality are calculated on the full network, and Spearman rank correlation is used to test the association between functional areas and centrality. The results reveal clear differences in the structural roles of functional nodes across the three games. In Hollow Knight and The Lost Crown, save points are relatively dispersed, weakly coupled with centrality, and function as a distributed safety net. In Blasphemous 2, save points exhibit higher small-radius coverage and redundancy and are more strongly aligned with central positions, indicating a hub-like stronghold structure. Teleport systems likewise reflect different design strategies, ranging from exploration-oriented sparse layouts to later-stage mobility optimization. Boss points in all three games generally remain structurally isolated, showing low overlap and weak centrality association. These findings suggest that differences in the placement of save points, teleport points, and boss points reflect distinct structural design strategies, and that network analysis can provide a quantitative basis for evaluating and optimizing such layouts in level design.

Fecal carriage of ESBL and Carbapenemase-producing Enterobacteriaceae, and its associated factors among hospital and non-hospital janitors at the University of Gondar, Northwest Ethiopia: A comparative cross-sectional study

PLoS ONE Amanuale Zayede, Yitayih Wondimeneh, Sirak Biset et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0355041

Background Extended-spectrum beta-lactamase (ESBL) and carbapenemase-producing Enterobacteriaceae (CPE) pose a critical public health threat. Janitors are routinely exposed to contaminated environments and may act as a reservoir for these resistant bacteria, particularly in resource-limited settings like Ethiopia, where data on this subject are scarce. Objective The aim of this study was to assess fecal carriage rates of ESBL-PE, CPE and its associated factors among hospital and non-hospital janitors at the University of Gondar (UoG), Northwest Ethiopia. Methods A comparative cross-sectional study was conducted from June 15 to September 25, 2025, at the UoG. A total of 385 janitors (203 hospital and 182 non-hospital) were selected using stratified and simple random sampling techniques. Data on socio-demographic and associated factors were collected using a semi-structured questionnaire. Stool samples were collected aseptically and cultured on MacConkey agar. Antimicrobial resistance (AMR) patterns were determined by the Kirby-Bauer disk diffusion method following Clinical and Laboratory Standards Institute (CLSI) 2024 guidelines. The ESBL and carbapenemase production were confirmed using the combination disk and modified Carbapenem inactivation methods, respectively. Quality control was ensured by using standard reference strains. Data analysis was performed using SPSS version 27.0, employing chi-square tests and logistic regression. A p -value of <0.05 was considered statistically significant. Result Among the 385 stool samples, a total of 416 Enterobacteriaceae isolates were recovered, 229 from hospital janitors and 187 from non-hospital janitors. The overall fecal carriage rates among janitors were 83 (21.6%) for ESBL-PE and 14 (3.6%) for CPE. Hospital janitors had significantly higher carriage rate than non-hospital janitors for both ESBL-PE (28.6% vs. 13.7%, p  < 0.001) and CPE (5.9% vs. 1.1%, p  = 0.012), respectively. Escherichia coli was the predominant ESBL-producer. Significant risk factors identified for ESBL-PE colonization included lack of hand hygiene at home, history of antibiotic use, and urinary tract infection for hospital janitors, and age ≥ 40 years and history of non-prescription antibiotic use were for non-hospital janitors. Conclusion and recommendations This high carriage rates of ESBL-PE and CPE, identify janitors as a significant reservoir for resistant bacteria. We recommend integrating janitors into national AMR surveillance programs and strengthening infection prevention and control and antimicrobial stewardship training.

Catastrophe mechanism and early warning indicators of seepage erosion-induced water inrush in karst cavities

PLoS ONE Jiejun Yuan, Peng Zhang, Xiaqing Qian et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354695

Seepage-erosion-induced water inrush in karst cavities is a typical form of water-inrush disaster in karst tunnels. It is governed not only by the spatial distribution of karst cavities and hydraulic recharge conditions, but also by the particle-size gradation and composition of the cavity fill. During seepage erosion, fill particles are progressively transported by flowing water, which may trigger a sudden water-inrush catastrophe. To reveal the catastrophe mechanism and establish early-warning indicators, this study employs the Smoothed Particle Hydrodynamics (SPH) method to simulate the evolution of seepage-erosion-induced water inrush under different particle-size gradations, cavity confining stresses, and seepage velocities. The inflection point of the cumulative particle loss rate is used as an indicator of catastrophic transition. The relationships among particle-size gradation, confining stress, seepage velocity, and particle loss rate at the transition point are then analyzed to determine early-warning thresholds. The results show that fill-particle loss is positively correlated with both seepage velocity and confining stress. When the content of fine particles, such as rock cuttings and fine sand, exceeds 60%, the inflection point corresponds to a seepage velocity of 1.6 m/s and a confining stress of 2.6 MPa, with an early-warning particle-loss range of 8%−15%. When the content of coarse particles, such as coarse sand and gravel, exceeds 40%, the inflection point corresponds to a seepage velocity of 3.0 m/s and a confining stress of 4.5 MPa, with an early-warning particle-loss threshold of approximately 45%.

A computer vision-based approach for automatically extracting data from bar chart raster images to facilitate meta-analysis of biomedical literature

PLoS ONE Alexander Cardaras, Seungjun Kim, Ye Yuan et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0347081

Although bar charts are widely used in scientific publications, their rasterized format within Portable Document Format (PDF) files complicates automated data extraction, hindering large-scale evidence synthesis and meta-analysis. To address this, we developed and evaluated an automated pipeline for extracting quantitative data from bar charts embedded in the biomedical literature. The four-stage pipeline comprises (1) image extraction and panel segmentation, (2) optical character recognition (OCR)-based text detection, (3) image disassembly to identify chart components, and (4) data reconstruction using numeric parsing and axis-based interpolation. The system combines edge detection, morphological operations, and convolutional neural network (CNN)-based figure classification using a transfer-learned Inception v3 model. Performance was validated on randomized controlled trials in age-related macular degeneration, with manually annotated values from a semi-automated labeling tool as the reference standard, and agreement was assessed using Bland–Altman analysis. Across 28 bar charts from ten publications, the pipeline correctly recognized 92.9% (95% confidence interval [CI], 77.4–98.0) of figure types, 96.0% (95% CI, 94.2–97.3) of text blocks, and 79.1% (95% CI, 74.7–83.0) of bars. For numerical reconstruction, 81.2% (95% CI, 76.3–85.2) of bar values fell within ±5% of the reference standard, 63.0% (95% CI, 57.3–68.3) within ±2%, and 48.6% (95% CI, 43.0–54.3) within ±1%. Bland–Altman analysis showed a small negative bias of −0.18 (95% CI, −0.34 to −0.02), with 94.9% of differences within the limits of agreement. Most outliers arose from OCR digit misclassification or ambiguous bar boundaries. This proof-of-concept study demonstrates the feasibility of automated data extraction from bar charts using a hybrid approach that combines image-processing heuristics with CNN-based classification. Although currently limited to bar charts and a single clinical domain, the pipeline represents a step toward scalable, end-to-end systems for automated evidence extraction to support meta-analyses across the biomedical literature.

Real-world regorafenib use among patients with advanced gastrointestinal stromal tumor in the United States

PLoS ONE Ryan A. Denu, Sreevalsa Appukkuttan, Brian Hocum et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0353357

Background Gastrointestinal stromal tumors (GIST) are the most common gastrointestinal soft tissue sarcoma. Tyrosine kinase inhibitors are guideline-recommended therapy; however, resistance often occurs, requiring subsequent therapy. Regorafenib is a multikinase inhibitor approved for third-line therapy. Real-world data surrounding regorafenib’s use and place in therapy are limited. Objective To understand real-world regorafenib utilization and patient characteristics among US patients with advanced GIST. Methods This retrospective cohort claims analysis used data from Merative™ MarketScan ® research databases and included patients with ≥1 pharmacy claim for regorafenib during the identification period (10/2015–5/2023) and ≥1 GIST diagnoses any time prior to/on index date (first regorafenib prescription claim). Primary outcomes included duration of therapy (DOT) and time to next therapy (TTNT). Outcomes were stratified based on prior GIST treatment during the baseline period (BL) and initial regorafenib dose (i.e., low dose [LD] or regorafenib standard dose [RSD]) as of the index date. Results Nearly half (45.2%) of patients received imatinib and sunitinib prior to regorafenib initiation, and 73.5% received RSD. Patients who received prior imatinib or sunitinib alone before regorafenib had a numerically longer median DOT with regorafenib than those who received both in the BL before regorafenib (142.5 days [IQR: 87–257.5] vs 95 days [IQR: 53–192]). Patients receiving LD and RSD demonstrated similar median DOT (103.0 days [IQR: 41.5, 210.5] vs 94.5 days [IQR: (35.0, 171.0]) and TTNT (143 days [IQR: 70–293] vs 141 days [IQR: 77–191]). Conclusions Patients on LD and RSD had similar DOT and TTNT. Acknowledging the limitations from this real-world data, patients with prior imatinib or sunitinib alone appeared to have longer DOT on regorafenib than those who received both. Further research is warranted to explore the clinical benefits of these differences.

Heat stress-induced photosynthetic impairment and autophagy modulation in Paris polyphylla var. yunnanensis: A physiological and molecular Perspective

PLoS ONE Lixia Lin, Xueqin Zhang, Ruiyun Lai et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354925

High temperature is one of the major environmental stressors that severely affects plant growth. Paris polyphylla var. yunnanensis , a traditional Chinese herbal medicine, is sensitive to high temperature. However, the underlying mechanisms of its response to high temperature remain unclear. In this study, we investigated the physiological and proteomic change of P. polyphylla var. yunnanensis under different treatments (25°C, 30°C, 35°C, 40°C). Our results showed that high temperature directly impaired photosynthesis and disrupted metabolism, evidenced by reduced chlorophyll and photosynthetic rate, as well as accumulated proline and increased conductivity. A total of 893 differentially expressed proteins (DEPs) were identified, with significant changes in the expression levels of enzymes associated with protein processing and synthesis. Additionally, the expression levels of key proteins involved in the circadian pathway and the glutathione pathway were also notably upregulated. Dynamic changes in the endocytosis and autophagy-related proteins ATG3 and ATG8C were also observed, suggesting that these processes may play a significant protective role under high-temperature stress. Overall, this study provides an important starting point for improving the heat tolerance of P.polyphylla var. yunnanensis through genetic engineering.

Analysis of the work, health and well-being experience of immigrant personal support workers in minority language contexts in Canada: Scoping review protocol

PLoS ONE Léonel Philibert, James Plaisimond, Judith Lapierre et al. Jul 31, 2026 DOI: 10.1371/journal.pone.0354960

Background The aging Canadian population has led to an increase in Canada’s use of home and community care services. In this context, the healthcare system relies heavily on personal support workers who work in various healthcare settings. A significant proportion of these workers are immigrants, and many live in linguistic minorities. Despite their pivotal role, the experiences and working conditions of these personal support workers are underrepresented in the scientific literature, specifically in intersectional analyses. This scoping review aims to examine the work experiences, health conditions, and well-being of immigrant personal support workers in Canada who work in a minority language setting. Eligibility criteria Studies addressing the work experiences, health conditions, and well-being of immigrant personal support workers in Canada who work in a minority language setting, and those published in English or French. There will have no restrictions on publication date. Method This review will follow the JBI recommendations for scoping reviews and incorporate the PRISMA-ScR checklist. We will develop an adapted search strategy for five relevant databases (Medline [Ovide], Web of Science, Embase, CINAHL, and Google Scholar). Two independent reviewers will select full-text articles based on pre-established inclusion criteria and extracted relevant data. The results will be presented in accordance with the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-analyses Extension for Scoping Reviews) guidelines. This scoping review contributes to expanding knowledge about the professional, health, and social realities of immigrant PSWs in Canada’s linguistic minority communities.

Veterinarian–pharmacist collaboration in veterinary medicine: Roles, practices, and perceptions—A scoping review

PLoS ONE Dan Kambayashi, Shota Suzuki, Masayoshi Hirohara Jul 31, 2026 DOI: 10.1371/journal.pone.0355233

Background Pharmacists are expanding their participation in veterinary healthcare teams and assuming roles beyond traditional dispensing duties. However, the scope of these collaborative practices and the degree of mutual recognition vary substantially across regions. Objectives This scoping review aimed to organize the existing literature on collaboration between veterinarians and pharmacists, clarifying current roles, practical applications, and professional perceptions within the veterinary field. Methods A scoping review was conducted to examine the roles, practices, and perceptions associated with veterinarian–pharmacist collaboration in veterinary medicine and related fields. Two researchers independently searched PubMed, Web of Science, the Cochrane Library, and Ichushi-Web, and additionally screened Google Scholar to identify gray literature (from database inception to August 2025, in English or Japanese). Records were independently screened at the title/abstract and full-text levels using predefined eligibility criteria, and relevant studies were identified. Results The search yielded 239 records, of which 16 studies published between 2007 and 2024 were included. Studies were conducted primarily in the United States (n = 7), New Zealand (n = 3), and Japan (n = 3); one study collected data from both Japan and Taiwan. Most studies employed cross-sectional survey designs. Pharmacist roles most frequently involved compounding and dispensing for animal patients (62.5%), followed by drug information (DI) and consultation (37.5%), inventory and supply management (25.0%), client education (18.8%), and safety and exposure control (12.5%). Conclusions This scoping review demonstrates that veterinarian–pharmacist collaboration is described within a limited and regionally variable evidence base, with pharmacists most often contributing through compounding/dispensing and drug information support. Sustained and scalable implementation will require improved mutual understanding of professional roles, strengthened veterinary-specific education for pharmacists, and more robust empirical research to inform collaborative practice models.

Graduating without a thesis: meet the people getting ‘practical’ PhDs in China

Nature Xiaoying You Jul 30, 2026 DOI: 10.1038/d41586-026-01242-z