Tag: nevin manimala

Sci Rep. 2025 Apr 19;15(1):13580. doi: 10.1038/s41598-025-98246-y.

ABSTRACT

Population distribution function is a particular area in sample surveys, and several researchers have worked to improve the accuracy of this study by using the auxiliary data. Recent studies estimate the population distribution function by applying stratified random sampling and non-response techniques, but there are some limitations in using the auxiliary data. However, we improve this study, which aims to maximize the accuracy of estimating the population distribution function under the combined effect of stratified random sampling and non-response groups. To achieve this goal in the condition of both sampling techniques, we introduce the use of a study variable and two auxiliary variables (mean and ranks). We conduct various estimations for real-world populations for theoretical and numerical findings. The results obtained from these estimators consistently demonstrate the better performance of the proposed classes of estimators over the currently existing estimators. This work also finds a comprehensive simulation analysis to evaluate the performance of various estimators. These findings show that the effectiveness of the proposed estimator significantly improves estimation accuracy. For additional validation and understanding of the relative effectiveness of the proposed estimators, this study also provides comparative graphs showing their performance relative to other current estimators.

PMID:40253523 | DOI:10.1038/s41598-025-98246-y

Sci Rep. 2025 Apr 19;15(1):13568. doi: 10.1038/s41598-025-97870-y.

ABSTRACT

Complex technological systems in oil refining and other industries, consisting of numerous interconnected units, are often characterized by the uncertainty of initial information required for modeling and optimizing their operating modes. This study addresses the issue of uncertainty in the development of models for such technological systems with fuzzy input, operational, and output parameters, which remain relevant yet underexplored and unresolved. The paper proposes a concept for developing a model package of interconnected units for technologically fuzzy systems and describes the implementation algorithm of the proposed concept. Based on this algorithm, hybrid models of interconnected reactors in the sulfur production unit at the Atyrau refinery were developed, consisting of statistical, fuzzy, and linguistic models. These models allow the determination of the sulfur volumes produced in the reactors and their fuzzy quality indicators depending on the reactors’ operating modes. The developed models of interconnected reactors, including the Claus thermal reactor and Cold Bed Absorption, are combined into a single model package according to the sulfur production process and the technological scheme of the research object. The resulting model package enables systematic modeling of reactor systems and the selection of optimal operating modes. For this purpose, a software suite was created to simulate various operating modes of the reactor system on a computer to optimize their operation. The results of systematic modeling and optimization of the sulfur production unit demonstrate the advantages of the proposed approach compared to known methods.

PMID:40253516 | DOI:10.1038/s41598-025-97870-y

Sci Rep. 2025 Apr 19;15(1):13619. doi: 10.1038/s41598-025-96973-w.

ABSTRACT

Tuberculosis (TB) is a major global health issue, contributing significantly to mortality and morbidity rates worldwide. Socioeconomic, environmental, and healthcare factors significantly impact TB trends. Therefore, we aimed to predict TB and identify the determinants of the disease using advanced artificial intelligence (AI). This study employed the advanced machine learning (ML) model, XGBoost (eXtreme gradient boosting), combined with XAI (eXplainable artificial intelligence) and spatial analysis to describe global TB incidence and mortality rates across 194 countries from 2000 to 2022. Spatial autocorrelation analysis utilizing Moran’s I revealed geographical clusters and significant determinants affecting TB incidence. Treatment success rates and MDR-TB treatment initiation were identified as pivotal determinants of TB incidence. The correlation study revealed a substantial positive relationship between TB incidence in HIV-positive patients and overall TB incidence (r = 0.83). Confirmed cases of MDR-TB had the most significant impact on TB incidence (SHAP = 0.874). Additionally, air pollution had a notable impact on TB incidence (SHAP = 1.36). The XGBoost model demonstrated the best predictive performance for TB incidence and mortality, exhibiting the lowest RMSE (0.88), the highest R² (0.67), and Adjusted R² (0.65). This study highlights the potential of integrating XGBoost and XAI methodologies as a holistic framework for effectively tackling global tuberculosis incidence and mortality rates, as well as for the proficient application of advanced analytical techniques in public health.

PMID:40253515 | DOI:10.1038/s41598-025-96973-w

Sci Rep. 2025 Apr 19;15(1):13591. doi: 10.1038/s41598-025-96336-5.

ABSTRACT

Artificial intelligence (AI) has the potential to improve healthcare and patient safety and is currently being adopted across various fields of medicine and healthcare. AI and in particular computer vision (CV) are well suited to the analysis of minimally invasive surgical simulation videos for training and performance improvement. CV techniques have rapidly improved in recent years from accurately recognizing objects, instruments, and gestures to phases of surgery and more recently to remembering past surgical steps. Lack of labeled data is a particular problem in surgery considering its complexity, as human annotation and manual assessment are both expensive in time and cost, and in most cases rely on direct intervention of clinical expertise. In this study, we introduce a newly collected simulated Laparoscopic Surgical Performance Dataset (LSPD) specifically designed to address these challenges. Unlike existing datasets that focus on instrument tracking or anatomical structure recognition, the LSPD is tailored for evaluating simulated laparoscopic surgical skill performance at various expertise levels. We provide detailed statistical analyses to identify and compare poorly performed and well-executed operations across different skill levels (novice, trainee, expert) for three specific skills: stack, bands, and tower. We employ a 3-dimensional convolutional neural network (3DCNN) with a weakly-supervised approach to classify the experience levels of surgeons. Our results show that the 3DCNN effectively distinguishes between novices, trainees, and experts, achieving an F1 score of 0.91 and an AUC of 0.92. This study highlights the value of the LSPD dataset and demonstrates the potential of leveraging 3DCNN-based and weakly-supervised approaches to automate the evaluation of surgical performance, reducing reliance on manual expert annotation and assessments. These advancements contribute to improving surgical training and performance analysis.

PMID:40253514 | DOI:10.1038/s41598-025-96336-5

Sci Rep. 2025 Apr 19;15(1):13582. doi: 10.1038/s41598-025-98247-x.

ABSTRACT

To synthesize the association between extreme ambient temperatures and the utilization of emergency healthcare services for substance use disorder (SUD). We performed a systematic literature review of original research published between 2000 and 2023 using five databases (PubMed, Embase, CINAHL, WoS, and Scopus) for literature search, and assessed study quality and risk of bias. A random-effects meta-analysis was conducted to calculate the odds ratios (OR) for SUD-related emergency healthcare service utilization during periods of extremely high or low ambient temperatures. Of 709 articles screened, eight studies met the eligibility criteria. Six studies focused on emergency department (ED) visits, while two examined on-site emergency care utilization. The risk of SUD-related ED visits was significantly higher when the mean ambient temperature was in the top 5% of the temperature distribution range (pooled OR = 1.11, 95% confidence interval [CI]: 1.07, 1.15). Conversely, the risk of SUD-related ED visits was lower when the mean temperature was in the bottom 5% of the distribution (pooled OR = 0.94, 95% CI: 0.89, 0.99). Our review showed the extremely high ambient temperature is associated with higher risk of SUD-related emergency healthcare service utilization. However, given the high heterogeneity observed across studies, these results should be interpreted with caution. Differences in study design, population characteristics, geographic region, and substance type may have contributed to this heterogeneity. Despite these differences, this finding highlights the importance of considering environmental factors in the management and prevention of SUD-related health issues.

PMID:40253512 | DOI:10.1038/s41598-025-98247-x

Heredity (Edinb). 2025 Apr 19. doi: 10.1038/s41437-025-00762-0. Online ahead of print.

ABSTRACT

Brown bears (Ursus arctos) colonized North America from Eurasia in two distinct and temporally separated waves. Once in North America they encountered endemic American black bears (U. americanus) during range expansions from eastern Beringia southwards into the interior of the continent. The establishment of sympatry between these species provided the opportunity for hybridization and introgression, which was previously identified at the species level using D-statistics. Both species have broad spatial ranges that should limit the extent of introgression, such that it is found primarily between sympatric populations. Here, we used range-wide sampling and whole genome sequencing of both bear species to test for spatial variability in introgression. We identified two pulses of introgression between brown and American black bears, and demonstrate the introgressed segments occur across spatially structured lineages in both species. The first pulse occurred 270-120 kya, near the initiation of intraspecific divergence, approximately 99-93 kya, within each species. This pulse occurred as sympatry was established in western North America. The second pulse occurred between western American black bears and North American brown bears and lasted to 9 kya. Introgression was bidirectional and sympatric lineages had more introgressed tracts and a larger proportion of the genome introgressed from the other species. This study advances our phylogeographic understanding of both iconic bear species through investigating the timing of divergence and gene flow as bears expanded and contracted their ranges across North America.

PMID:40253500 | DOI:10.1038/s41437-025-00762-0

Sci Rep. 2025 Apr 19;15(1):13603. doi: 10.1038/s41598-025-97759-w.

ABSTRACT

Febrile seizures (FS) is the most common type of convulsion in infants and preschool children. This study aimed to investigate the associations between gut microbiota abundance, plasma metabolites, circulating cytokines, and FS. Summary statistics of 211 gut microbiota traits, 1,400 plasma metabolite traits, 91 circulating cytokine traits, and FS were obtained from publicly available genome-wide association studies. Two-sample Mendelian randomization (MR) analysis and causality was inferred using Inverse variance-weighted (IVW), Weighted median, MR-Egger, simple mode-based estimate and weighted mode-based estimate 5 methods. Several sensitivity analyses were also used to ensure the robustness of the results. Furthermore, mediation analysis was used to determine the pathway from gut microbiota to FS mediated by plasma metabolites and circulating cytokines. MR revealed the associations of 1 gut microbiota (phylum Verrucomicrobia), 4 circulating cytokines and 50 plasma metabolites on FS. Based on the known pathogenic metabolites, we observed that the tryptophan, androgen, and sphingolipids pathways are associated with FS. Mediation analysis revealed 1 strongly documented plasma metabolite (Ascorbic acid 2-sulfate) as a mediator linking “gut microbiota to plasma metabolite to FS”. Sensitivity analysis was represented no heterogeneity or pleiotropy in this study.Our study provides some causal evidence concerning the effects of the gut microbiota, circulating cytokines, and plasma metabolites on FS, which needs to be verified in randomized controlled trials. These biomarkers provide new insights into the underlying mechanisms of FS and contribute to its prevention, diagnosis, and treatment.

PMID:40253491 | DOI:10.1038/s41598-025-97759-w

Sci Rep. 2025 Apr 19;15(1):13550. doi: 10.1038/s41598-025-96872-0.

ABSTRACT

This study aims to understand the historical and development of throwing embroidered balls, combine information processing and drone technology to innovate throwing techniques, improve the competitive level and competition rules, promote the high-pole throwing embroidered balls to the international sports. Utilizing literature review method to clarify the evolution history of throwing embroidered balls; using mathematical statistics to analyze the results of competition during the 12th and 13th Guangxi Student Games; Using mechanics analysis and animation production methods innovate throwing techniques. The imperfect competition rules, inconsistent specifications of embroidered balls, and outdated throwing techniques have hindered the healthy development of throwing embroidery ball. The optimal throwing angle range for innovative throwing techniques is between 64° < α < 72°, with the range of throwing speed being between 13.04 m/s < v < 13.70 m/s. When α < 66°, v≈13.70m/s, the ball passes through the lower edge of the top of the circle; When α > 64°, v≈13.04m/s, when α < 72°, v≈13.17m/s, the ball passes through the upper edge of the bottom of the circle. Drone aerial photography technology can assist judges; using animation production techniques to form throwing motion models to guide training can improve competitive skills. Improving competition rules, unifying the use of competition balls, and strengthening the integration of information technology with ethnic sports can effectively enhance the development level of the sport of throwing embroidered balls.

PMID:40253481 | DOI:10.1038/s41598-025-96872-0

Sci Rep. 2025 Apr 19;15(1):13574. doi: 10.1038/s41598-025-98273-9.

ABSTRACT

European guidelines require packed red blood cells (pRBC) to be stored at 2-6 °C. However, negative temperature shifts can occur especially in prehospital transfusion. We investigated the impact of sub-zero temperature exposure on pRBC storage quality. At day 6 post donation (D6), three cohorts (14 pRBC) were put on a supercooled table for 10 h at either – 1 °C, -5 °C, and – 11 °C and compared to a control cohort. Hemolysis, pH and plasma biochemistry were evaluated weekly until D49. Storage-induced micro-erythrocytes (SMEs) were quantified as a surrogate marker for transfusion recovery. The primary endpoint was compliance with European storage standards at D42. The three sub-zero-exposed cohorts met standards at D42. Differences in hemolysis, pH, plasma biochemistry, or SMEs between exposed and control cohorts were non-statistically and/or non-clinically significant. Ten hours exposure to sub-zero temperatures down to -11 °C by conduction maintains storage quality of pRBCs, enabling a wiser risk assessment for potential transfusion use.

PMID:40253464 | DOI:10.1038/s41598-025-98273-9

Sci Rep. 2025 Apr 19;15(1):13517. doi: 10.1038/s41598-025-98533-8.

ABSTRACT

This study aimed to investigate the flow rate accuracy and bolus doses of four portable pumps with different mechanisms. We evaluated two electronic (COOPDECH Amy PCA [Amy] and CADD-Solis) and two elastomeric balloon-type pumps (COOPDECH Balloonjector and Rakurakufuser) under the following conditions: placement with an epidural catheter, operation on a shaking table, warming to 32 °C, and at room temperature (control, 25 °C). Amy maintained consistent flow rates across all conditions. The CADD-Solis also exhibited consistent flow rates, with minor yet statistically significant changes upon epidural catheter placement (- 5.0%, P = 0.005) and motion conditions (4.2%, P = 0.015). The Balloonjector and Rakurakufuser exhibited flow rate variations over time, and temperature increases significantly increased flow rates by 24.3% (P < 0.001) and 20.3% (P < 0.001), respectively. Bolus volume accuracy for the Amy, Balloonjector, and Rakurakufuser was not significantly affected under different conditions. The CADD-Solis showed a slight decrease in bolus volume with an epidural catheter (mean difference, 0.3 mL; P = 0.003). The electronic pumps maintained consistent flow rates across various conditions, whereas elastomeric balloon pumps exhibited variable rates influenced by time and temperature, increasing the risk of medication overdose. Bolus dosing accuracy was clinically satisfactory for all pump mechanisms.

PMID:40253460 | DOI:10.1038/s41598-025-98533-8