bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calibration of the Omnidirectional Vision System for Robotics Sorting System
Authors: Kholodilin Ivan , Zhang Zihan , Guo Qihui , Grigorev Maksim 
Published: November 2024

Abstract

Sorting objects is a relevant field in the robotics direction and includes a complex approach in order to meet the objectives. The important part of this system is a vision system. Vision system should provide a correct distance to obstacles to make the robot operate with them properly. In this paper is considered an omnidirectional vision system consisting of the fisheye camera and structured light. Towards other vision systems, an omnidirectional one has its own distinctive advantages as it can provide more information of the environment on the image snapshot. The advantage of the use of the structured light is its simple detection the image. However, before moving to the distance measurements the vision system must be calibrated. This paper proposed an improved extrinsic calibration of the vision system. The calibrated vision system is evaluated experimentally by using simulated and real data to demonstrate that the proposed calibration method is more robust and provides a higher measurement accuracy in comparison to other methods. This paper also proposed a simulator which was useful during experiments part and can be useful for researchers in robotics direction. Built using Unity, the simulator integrates vision system, industrial robot, elements of the environment, and allows one to generate synthetic photo-realistic datasets with automatic ground truth annotations. The proposed simulator and supporting materials are available online: https://github.com/kholodilinivan/RoboticsSystemCalibration.
Willingness and influencing factors of maintenance hemodialysis patients to use mobile healthcare apps: a cross-sectional study
Authors: Xu Jun , Guo Suping , Yu Xintao , Ji Xiaojing 
Published: November 2024

Abstract

Purpose: Grounded on the Technology Acceptance Model and integrating theories of perceived risk and trust, this study explores the willingness of maintenance hemodialysis patients to use mobile healthcare application services as well as its influencing factors.
Patients and Methods: Using convenience sampling, 313 maintenance hemodialysis patients treated in six comprehensive hospitals in Yangzhou City were selected as survey subjects from January to March 2024. The study utilized a general information questionnaire and a specific questionnaire assessing the willingness of maintenance hemodialysis patients to use mobile healthcare application services. A structural equation model was constructed to analyze the influencing factors.
Results: The scores for each dimension assessing the willingness of maintenance hemodialysis patients to use mobile healthcare application services questionnaire were as follows: Perceived Risk (3.31±1.20), Perceived Trust (3.63±0.85), Social Influence (3.84±0.86), Perceived Ease of Use (3.57±0.96), Perceived Usefulness (3.69±0.84), Individual Innovativeness (4.02±0.97), and Willingness to Use (3.85±0.92). Structural equation model analysis indicated that Perceived Ease of Use, Perceived Usefulness, and Individual Innovativeness have a positive impact on the Willingness to Use, with effect values of 0.25, 0.38, and 0.21, respectively. There differences were statistically significant (all P<0.05).
Conclusion: The willingness level of maintenance hemodialysis patients to use mobile healthcare application services is above average. Key factors influencing the willingness of maintenance hemodialysis patients to use these services are Perceived Ease of Use, Perceived Usefulness, and Individual Innovativeness.
High cycle fatigue limit prediction of machining foreign object damaged TC17 titanium specimen based on the theory of critical distance
Authors: Lu Kainan , Shang Yibo , Wang Chen , Li Bin , Zhang Xiaosheng , Wang Lingfeng , Zhao Zhenhua , Zhou Liucheng , Chen Wei 
Published: November 2024

Abstract

Aircraft engine fans and compressor blades are inevitably subject to external damage during service. It’s an important work to predict the high cycle fatigue limit of foreign object damaged blades. In this paper, machining aerofoil specimen were manufactured to simulate the foreign object damaged blade, and the high cycle fatigue limit of machining foreign object damaged TC17 titanium aerofoil specimen were tested at 3×107 cycles, and a high cycle fatigue limit prediction model of machining foreign object damaged TC17 titanium aerofoil specimen was built based on the theory of critical distance, and compared with the Peterson model. The prediction error is 9.56%±6.78% for theory of critical distance model and 59.76%±16.93% for Peterson model. The accuracy of fatigue limit prediction on notched samples using theory of critical distance model is much higher than that of Peterson model, and the theory of critical distance method model is more efficient to evaluate the fatigue strength of notched blade.
Morphological and molecular variability of the species complex of Actinostella flosculifera (Le Sueur, 1817) (Cnidaria: Actiniaria: Actiniidae) across the western and eastern Atlantic Ocean: are there cryptic species involved?
Authors: Durán-Fuentes Jeferson A. , González-Muñoz Ricardo , Lizaola-Guillermo José M. , Mendes Flavío , Brandão Rafael , Gomes Paula B. , Pereira Sergio , Santana Ana Clara P. , Stampar Sérgio N. 
Published: November 2024

Abstract

Based on a phylogenetic and morphological analysis of different populations of Actinostella flosculifera (Le Sueur, 1817) species complex throughout the Caribbean Sea, the Gulf of Mexico, and Brazil, and on the descriptions of Barragán et al. [1] from the Caribbean Sea and Ocaña (1994) from the Canary Islands (CI), as well as other studies in South America, we found that all samples of A. flosculifera on the east coast of America presented similar characteristics (both internal and external) and could not be distinguished from one another. Genetically, we could differentiate two subclades. The individuals of the CI presented holotrichs and an additional mesenteric cycle, indicating that reviewing new material for verification is necessary. Additionally, we document the second report of cinclides within the family Actiniidae. We recognize the need for further molecular studies to understand the evolutionary history of the A. flosculifera species complex, incorporating additional specimens from other locations, as well as sequences from other congeners, and using other molecular markers (e.g., with ultraconserved elements).
Relationships among social capital, community identity and perceived safety resilience under public emergencies: Evidence from Shanghai
Authors: Tian Shuicheng , Ning Shiqiang , Li Hongxia , Chen Lei , Zhu Haoming , Gao Guoping 
Published: November 2024

Abstract

Community resilience is important to public safety in the face of unexpected disruptions caused by public emergencies. In addressing how to improve the ability of community systems to absorb, adapt, learn, and recover when confronted with the perturbations of public emergencies, this study examines the relationships among three types of social capital (SC), community identity (CI), and community resilience from the perspective of social psychology. The study introduces the notion of perceived community safety resilience (PCSR) based on the concepts of perceived resilience and safety resilience, and then conducts theoretical modeling of the relationships among PCSR, CI, and SC. Using public health emergencies in Shanghai from March to June 2022 as an example, our hypotheses were tested through structural equation modeling with survey data from 349 Shanghai residents. The results show that Bonding SC, Bridging SC, and Linking SC are correlated with each other. Bonding SC and Linking SC have significant positive effects on CI and PCSR, while the effect of Bridging SC on CI and the effect of Bridging SC on PCSR are not significant. CI has varying degrees of partial mediation effects between the three types of SC and PCSR. Under China’s emergency management model, Linking SC plays the most critical role in enhancing CI and PSCR. However, the hypothesized relationships between Bridging SC and PCSR, as well as between Bridging SC and CI, are not significant. To improve the community’s ability to respond to emergencies, more attention should be paid to the cultivation of Bridging SC. The results contribute to understanding the current relationships among SC, CI, and PCSR. This study provides a reference for policymakers and community residents to enhance community resilience in the face of public emergencies through the cultivation of SC and CI.
Physical Layer Implementation Analysis of IEEE 802.11be Preamble Puncturing in SU Transmission
Authors: DEMBELE Hamidou , Chou Sih-Yu 
Published: November 2024

Abstract

Due to incumbent technologies in the 6 GHz band, including dynamic frequency selection (DFS) activities such as radar and military communications, as well as interference from other neighboring Wi-Fi networks in dense and highly competitive environments, contiguous wide channel bandwidths like 80, 160, 240, and 320 MHz may not always be available for wireless local area network (WLAN) deployment. To address these challenges, preamble puncturing has been adopted as a mandatory feature in IEEE 802.11be (Wi-Fi 7). This technique allows nonprimary 20 MHz channels to be excluded in transmission bandwidths of 80 MHz or greater. While the implementation of preamble puncturing has been demonstrated in multiple-users (MU) scenarios with orthogonal frequency division multiple access (OFDMA) in IEEE 802.11ax (Wi-Fi 6) downlink transmissions, its feasibility, especially for single-user (SU) transmission at the physical (PHY) layer, including resource units (RUs) aggregation in IEEE 802.11be, remains under investigation, with ongoing research efforts. This paper explores preamble puncturing in SU transmissions, tracing its evolution from IEEE 802.11ax to its anticipated implementation in IEEE 802.11be. Our study including simulations results reveal that preamble puncturing with PHY Option 3 offers significant benefits, including reduced hardware complexity and lower transmission airtime. This approach involves aggregating non-contiguous available RUs with a post-channel encoding parser. It is well-aligned with both current and future IEEE 802.11 PHY processing standards, including joint low-density parity check (LDPC) encoding. For RUs affected by DFS or other transmissions, signal power must be reduced to remain below the clear channel assessment (CCA) threshold. Our findings indicate that incorporating contaminated RUs with negligible signal power into the aggregation results in minimal signal-to-noise ratio (SNR) wastage across most puncturing options outlined in the IEEE 802.11 specification.
Occupational Stress and Coping Mechanism Among District Armed Reserve (DAR) Police, Karnataka, India
Authors: G Shonly K , Thekkel Sudha Thomas 
Published: November 2024

Abstract

INTRODUCTION
This research investigates District Armed Reserve (DAR) police personnel, a significant but often underappreciated organization whose tireless efforts go unnoticed in society. The study aims to understand better the demands placed on DAR police personnel in their occupation and investigate coping mechanisms for stress management. By exposing the various difficulties the police force encountered, the study established an in-depth understanding of their obligations.
AIM
The research sought to investigate how the District Armed Reserve Police (DAR) experience occupational stress and explore their coping mechanisms to manage it.
METHODS
The study uses a mixed-method, explanatory design and 104 DAR police personnel from Dakshina Kannada District of Karnataka. Researcher distributed the questionnaire to the participants, utilizing the Dass-21 and Coping Scale. Furthermore, they selected five participants for semi-structured, in-depth interviews. Thematic analysis was employed to identify recurrent themes in the qualitative data, offering a comprehensive understanding of the research issue.
RESULTS
The study found non-normal distributions in Total Stress and Total Coping scores, with a significant positive correlation between stress levels and coping mechanisms (r = 0.349, p < 0.01, 2-tailed). In qualitative, Coping mechanisms include seeking positive thoughts, engaging in personal interests, and seeking support.
CONCLUSIONS
The study highlights the significant occupational stress experienced by DAR police personnel, revealing specific stressors and coping mechanisms used by these personnel.
DASNet: Dual-Branch Multi-Level Attention Sheep Counting Network
Authors: Yini Chen , Ronghua Gao , Qifeng Li , Hongtao Zhao , Rong Wang , Luyu Ding , Xuwen Li 
Published: November 2024

Abstract

The grassland sheep counting task is recognized as an efficient approach for promoting the development of the livestockeconomy and maintaining the ecological balance of the grassland. In this paper, the Dual-Branch Multi-Level Attention SheepCounting Network (DASNet) is presented as a novel solution designed to address the challenges of automated sheep countingin dense grassland environments. Traditional methods have been labor-intensive and prone to inaccuracies, underscoringthe need for more efficient and accurate systems. DASNet is built on a modified VGG-19 architecture, where a dual-branchstructure is employed to integrate both shallow and deep features, thereby enhancing texture and contour detection whilereducing background noise interference. A Convolutional Block Attention Module (CBAM) is incorporated into the network tomore effectively focus on sheep regions, alongside a Multi-Level Attention Module (MAM) in the deep feature branch. TheMAM, consisting of three Light Channel and Pixel Attention Modules (LCPM), is designed to refine feature representationat both the channel and pixel levels, improving the accuracy of density map generation for sheep counting. In addition, aresidual structure is used to connect each module, facilitating feature fusion across different levels and offering increasedflexibility in handling diverse information. Experiments conducted on the self-collected Sheep1500 dataset have demonstratedthat DASNet significantly outperforms the baseline VGG-19 network, with a Mean Absolute Error (MAE) of 3.95 and a MeanSquared Error (MSE) of 4.87, compared to the baseline’s MAE of 5.39 and MSE of 6.49. DASNet is shown to be effectivein handling challenging scenarios, such as dense flocks and background noise, due to its dual-branch feature enhancementand global multi-level feature fusion. DASNet has shown promising results in terms of accuracy and computational efficiency,making it an ideal solution for practical sheep counting in precision agriculture.
Nov 3, 2023 Nepal earthquake: Source mechanisms and structural response of Indo-Gangetic basin
Authors: Silwal Vipul , Dwivedi Adarsh , Mahanta Rinku , Mittal Himanshu 
Published: November 2024

Abstract

The 2023 Nepal earthquake is one of the major earthquakes in the Himalayas after the 2015 Gorkha earthquake. The shaking from the earthquake was felt strongly in Nepal and parts of Indo-Gangetic basin. In this study, we estimate the source mechanism of the earthquake using regional and teleseismic broadband seismograms, and polarity information from local RaspberryShake seismome-ters. We further simulate the moment tensor solution for the 2023 event in a three-dimensional medium using the spectral element method. This region is of particular importance because of extreme topographic variations, large crustal thickening beneath Tibet, and the presence of thick Indo-Gangetic sedimentary basin. The structural model used for simulation includes the basin and the topo-graphical variations. With this simulation, we compare peak ground velocity (PGV) values at basin and non-basin sites. The results are useful for hazard assessment and mitigation by characterizing places with higher potential for ground shaking.
Empirical Laws of Location and Rupture Time of Asperities for Strong Ground Motion Prediction
Authors: Oshima Mitsutaka 
Published: November 2024

Abstract

The location of asperities on a fault plane, together with rupture times, has a significant influence on strong ground motion. If these positions for predicting strong ground motions of future earthquakes could be set empirically based on data from actual earthquakes, it would be possible to predict ground motions with better accuracy and greater adherence to reality. For some earthquakes, data and dynamic rupture simulations have shown that the time from the beginning of the seismic waveform until the amplitude increases scales with the earthquake magnitude. In this study, the author extracted asperities from fault slip data inferred by waveform inversion and showed that asperity rupture times and distances between asperities (or maximum slip subfault)and hypocenters are proportional to the cube root of the seismic moment. It was also confirmed that this relationship is not merely attributed to an increase in fault area with the increase in magnitude of the earthquake. Scaling laws were also obtained for each earthquake type (inland, inter-plate, and intra-plate) and focal mechanism. The distance from the hypocenter to the asperities (or maximum slip subfault) is the greatest for the strike-slip and inland earthquakes. Furthermore, in 71.1% of the strike-slip earthquakes and 71.8% of the inland earthquakes, the maximum slip point was found to be located shallower than the hypocenter. In addition, 70.5% of the asperities closest to the hypocenter are the largest asperities on the fault plane. The percentages of maximum slip points located at the asperities closest to the hypocenter and at the largest asperity on the fault plane are 73.5% and 86.8%, respectively. The empirical rules presented in this study are useful for improving the accuracy of prediction results by setting the location of asperities and rupture times in the models used for strong ground motion prediction to match those of actual earthquakes.
The Relationship Between Dietary Fiber Intake and C-reactive Protein Levels in Elderly Diabetic Patients With Cardiovascular Disease Risk
Authors: Yin Bo , Wang Tian , Wu Yuyun , Lv Silu 
Published: November 2024

Abstract

Background
Dietary fiber, a key component of food, has been studied for its potential to reduce cardiovascular disease risk. However, the relationship between dietary fiber intake and CRP levels in elderly diabetic patients remains unclear. This study aimed to examine the effect of dietary fiber intake on CRP levels in diabetic patients aged over 60 years.
Methods
Data were sourced from the 2009–2010 National Health and Nutrition Examination Survey (NHANES). The cohort consisted of participants over 60 years old with a diabetes diagnosis. CRP levels were classified into two risk categories: low/normal and medium/high. Multivariate regression models were applied to evaluate the effect of dietary fiber intake on CRP levels, adjusting for confounding variables such as age, gender, alcohol consumption, and body mass index (BMI). Sensitivity analyses, including robust regression and variable transformation, were performed to confirm the stability of the results.
Results
A total of 204 participants were included in the analysis. Among individuals with moderate alcohol consumption, Higher dietary fiber intake was linked to lower CRP levels. [β=-0.03, 95% CI: (-0.04, -0.01), p < 0.001], while this relationship was weaker and non-significant in the almost non-drinking and excessive drinking groups. Overall, dietary fiber intake was negatively correlated with CRP levels after adjusting for other variables [β=-0.02, 95% CI: (-0.04, -0.01), p = 0.003]. Sensitivity analyses using robust regression and variable transformations reinforced the consistency of these findings.
Conclusions
Our study indicates that dietary fiber intake is significantly inversely related to CRP levels in elderly individuals, particularly those with moderate alcohol consumption. This suggests that increasing dietary fiber intake could be a valuable lifestyle intervention for reducing inflammation and potentially lowering cardiovascular disease risk. However, the non-linear relationship between dietary fiber and CRP was not significant, warranting further research.
Efficacy of neoadjuvant toripalimab plus chemotherapy and the role of dynamic monitoring of plasma cell-free DNA methylation in predicting pathological response in resectable stage IIB-IIIB non-small cell lung cancer (RENAISSANCE study): a prospective phase II trial
Authors: Liu Bing , Tao Ye , Zhuo Minglei , Xu Li-Di , Lv Chao , Wang Yuzhao , Li Shaolei , Zhang Shanyuan , Huang Miao , Wang Yaqi , Li Xiang , Zhu Yuge , Cui Xinrui , Zhou Xuantong , Han Bateer , Zhang Enli , Huang Yu S. , Chen Weizhi , Wang Jia , Yan Shi , Wu Nan 
Published: November 2024

Abstract

Introduction:
Neoadjuvant chemoimmunotherapy does not benefit all non-small cell lung cancer (NSCLC) patients, and reliable biomarkers are urgently needed. We conducted this prospective phase II trial of neoadjuvant chemoimmunotherapy to explore the role of cell-free DNA (cfDNA) features in pathological response assessment.
Methods
Totally, 100 patients with stage IIB-IIIB NSCLC were enrolled and treated with neoadjuvant toripalimab plus platinum-based chemotherapy for at least 2 cycles. Targeted methylation panel sequencing and whole methylation sequencing (WMS) were conducted on 195 cfDNA samples collected from 60 patients before each treatment cycle (C0, C1) and before surgery (BS), with subsequent calculations of methylation fragment ratio (MFR) and chromosome aneuploid of featured fragment (CAFF) scores, respectively. The correlations between MFR or CAFF and pathological response were evaluated.
Results
Finally, 83 patients underwent surgery, and 54 (65.1%) patients achieved major pathological response (MPR), including 38 (45.8%) with complete pathological response (pCR). The median MFR and CAFF scores in both the MPR and non-MPR groups significantly decreased after the first cycle, but the MPR group maintained low levels before surgery (P < 0.001). According to pre-defined cut-off values, the MFR and CAFF scores were recategorized as low or high. Patients with low MFR at BS (74.5% vs. 11.1%, P < 0.001) or low CAFF at C1 (73.9% vs. 36.4%, P = 0.031) and BS (76.2% vs. 38.9%, P = 0.008) were more likely to achieve MPR than those with high MFR or CAFF at the same points. Three dynamic patterns were identified: C0 low, C0 high/C1 low and C0 high/C1 high. These patterns were further divided by BS low or high, which indicated distinctive MPR rate (C0 low: BS low vs. high 78.9% vs 0%; C0 high/C1 low: BS low vs. high 73.9% vs. 25%; C0 high/C1 high: BS low vs. high 83.3% vs. 0%). An integrative model was constructed by incorporating immune parameters and cfDNA features (MFR and CAFF) at C1 and BS, achieving an AUC of 0.86 (95% CI: 0.80–0.92).
Conclusion
Neoadjuvant chemoimmunotherapy could achieve an optimal response rate. Dynamic monitoring of cfDNA methylation has potential to predict pathological response of neoadjuvant chemoimmunotherapy in NSCLC.