bluuebunny/crossref_metadata_2025_split huggingface dataset:
Imaging simulation analysis of space targets by different observed orbits
Authors: Xu Yantong , Tao Dongxing , Liu Xiaoning , Wang Jiulong , Bi Yanqiang , Zhang Guang , Lin Boying , Li Xiyuan , Li Qing , Wan Dongmei 
Published: November 2024

Abstract
For most optical simulations of space targets, static imaging characteristics are studied with a pre-set angle and attitude which are less consistent with the actual situation for satellite detectors’ dynamic image. Especially when the detector and the target are in different orbits, the imaging angles and attitudes also vary. In this article, two kinds of observed orbits are selected to simulate the detector image results, and the observed attitude and angle are updated over time through the simulation process. Furthermore, a temperature field of the space target is also calculated as preconditioned data to be taken into account in the optical simulation, instead of roughly estimating the temperature. The result of the study reveals that when the satellite detector and target operate at coplanar orbits, closer distances (ranging from 236 km to 28 km) allow for the acquisition of more specific details regarding the target’s characteristics. This research may offer a new approach to selecting orbits to obtain high-quality imaging data.
Free vibration analysis of rectangular plates resting on an elastic foundation
Authors: Li Gen 
Published: November 2024

Abstract
Rectangular plate on elastic foundations is a common structural form in aerospace fields, while there still lacks a general analytical method for free vibration analysis of this kind of structure. Thus, the extended separation-of-variable method is used to obtain the analytical free vibration solutions for plates with all kinds of homogeneous boundary conditions. The mode functions are assumed to be in separation-of-variable form, and the natural frequencies of two-direction mode functions are mathematically independent. Then, the free vibration solutions are obtained according to the two-direction boundary conditions. The correctness of the present results is verified via numerical comparisons. Parameter study shows that the elastic foundation significantly affects the flexural vibration behaviors of rectangular plates, and the influence is dependent on boundary conditions and mode orders of rectangular plates.
Modeling and analysis of tethered satellite systems based on spinning deployment
Authors: Liu Guotong , Fan Fengchen , Miao Yuanqing , Zhang Tianyu , Bian Yushu 
Published: November 2024

Abstract
In recent years, with space science and technology development, tethered satellites have been widely recognized and valued. This paper analyzes a tether satellite system based on spinning deployment by dynamic modeling and numerical simulation to analyze the factors affecting its deployment stability. Firstly, the dynamic model of the tethered satellite system under the action of spinning centrifugal force is established using the dumbbell model. Then, numerical simulation is conducted to study the factors affecting the deployment stability of the tethered satellite system. Finally, a feasible and stable deployment control method is proposed based on actual working conditions.
Molecular dynamics simulation of particle radiation damage processes in ZnO crystals
Authors: Yu Lantao , Fan Chao , Gao Qingzhe , Lv Liangxing 
Published: November 2024

Abstract
The cascade collision process in ZnO crystal caused by Primary Knocked Atom (PKA) under different incident conditions has been simulated by the Molecular Dynamics (MD) method. Simulation results show that the incident depth is smaller than 20 atomic layers for PKAs with initial kinetic energy less than 2 keV, and more than 30 atomic layers for PKAs with energy larger than 5 keV. For PKAs with lower energy, the defects are mainly distributed near the incident trajectory, and the distribution range of defects becomes wider with the increase of PKA energy. When the PKA energy is less than 10 keV, the number of defects will reach the peak within 1 ps, and then the system enters into the annihilation process and reaches to steady state within 20 ps. In addition to the incident energy, the incident direction of PKA also has a great influence on the cascade collision process and defect distribution. Compared with two other cases, <111> direction and <001> direction, PKAs along <011> direction produces significantly more defects, with a distribution more concentrated, and the defect recombination rate is also higher in the annihilation process. The evolution of different types of defects in the cascade collision process is different, and the number of O vacancies is the largest, followed by the number of O interstitial atoms, Zn interstitial atoms, and Zn vacancies. Some of the interstitial O atoms replace the Zn vacancies during the annihilation process.
Dynamic modeling and ground verification of space flexible net deployment
Authors: Liu Zhiyang , Yang Yueneng , Feng Haoqing , Zhang Shifeng 
Published: November 2024

Abstract
This article presents a modeling and simulation method to simulate the deployment process of a space net. The space net is simplified into a spring-damping model using the finite element method, and a dynamic model of the process is established. The configuration of the net and the variation of internal forces during the ejection and deployment process are analyzed through simulation calculations. In addition, ground experiments were conducted and compared with simulation results. By calculating the effective deployment area during the flight of the net, the reliability of the model and the feasibility of capturing the target are verified.
The impact of roughness on the resistance of full-scale ships
Authors: Yin Anpeng , Zeng Xiangming 
Published: November 2024

Abstract
This study aims to explore the impact of hull roughness on ship resistance, which provides a reference for enhancing the operational efficiency and energy-saving levels of ships. Initially, the development and accuracy of Computational Fluid Dynamics (CFD) numerical simulations are elucidated through literature, and the current state of research on hull roughness by scholars both domestically and internationally is introduced. Subsequently, taking the 2000 TEU container ship SITCCAGAYAN as the object of study, a CFD simulation is performed based on the unsteady Reynolds-averaged Navier-Stokes equations in Star CCM+ software. An improved wall function method and roughness function are used to design the simulation experiments, conducting the resistance prediction under various conditions, including the fully smooth hull, fully rough hull, and different levels of roughness at various parts of the hull. The experiment, based on results such as the increase in resistance, roughness impact factor, and roughness Reynolds number, demonstrates that the surface roughness of the hull significantly affects the magnitude of ship resistance. An increase in local and overall roughness leads to an increase in total resistance, but the roughness at the bow part of the ship has the greatest impact on resistance.
Luigi Pasinetti: an appreciation
Authors: Milgate Murray , Eatwell John , de Vivo Giancarlo 
Published: November 2024

Abstract
This article presents an appreciation of the lifetime contributions of Luigi Pasinetti to economics. In a career spanning 70 years, Pasinetti operated at the frontiers of economic theory and analysis. The article covers his contributions to the economics of growth, distribution, capital, structural change, production and fiscal policy. It also provides an account of his intellectual formation and a checklist of his published works.
Factors impacting vaccine uptake among adult Medicaid beneficiaries: a systematic literature review
Authors: Moss Emily , Eiden Amanda L , Hartley Louise , Carrico Justin , Farkouh Raymond , Poston Sara , Gabriel Meghan , Golden Anna Hundt , Bhatti Alexandra 
Published: November 2024

Abstract
Vaccine uptake is suboptimal among adult Medicaid beneficiaries. To evaluate factors affecting vaccine uptake among adult Medicaid beneficiaries and/or affecting healthcare providers who vaccinate adult Medicaid beneficiaries, we conducted a systematic literature review in Embase, Medline, Database of Abstracts of Reviews of Effects, and the Cochrane Library for articles published from January 2005 through July 2022 and relevant conferences. For included studies, data were extracted on the study characteristics, patient and provider cost barriers, patient and provider perceived risks/benefits, and other barriers faced by patients and providers. Quality assessments were conducted using a checklist from the Joanna Briggs Institute. Twenty-one studies analyzed patient-related factors (14 studies) and/or provider-related factors (8 studies). Reviewed studies indicate that vaccine uptake is influenced by insurance benefit and cost-coverage policies, including cost-sharing, access to vaccination services, and vaccine education and awareness. Financial factors, including reimbursement for vaccine acquisition and administration, influence providers' vaccination practices for Medicaid beneficiaries. Our findings suggest that reducing or eliminating vaccination cost-sharing, promoting vaccine education and awareness about the importance and safety of vaccines, increasing access, and exploring reimbursement rates equivalent with other public or private insurance plans could mitigate barriers to vaccination for the adult Medicaid population.
Risk Factors and Management of Portal Vein Thrombosis after Hepatectomy: A Single-Center Experience
Authors: Wakizaka Kazuki , Shichi Shunsuke , Aiyama Takeshi , Asahi Yoh , Nagatsu Akihisa , Orimo Tatsuya , Kakisaka Tatsuhiko , Taketomi Akinobu 
Published: November 2024

Objective:
This study investigated the risk factors and management of portal vein thrombosis (PVT) after hepatectomy.

Background:
PVT after hepatectomy can cause liver dysfunction and portal hypertension, and may be fatal. However, it has not been sufficiently investigated.

Methods:
The study included 1403 consecutive patients who underwent elective hepatectomy at our department from January 2010 to July 2022. The patients were divided into PVT and non-PVT groups based on the presence or absence of PVT, and relevant risk factors were analyzed. The management and prognosis of patients with PVT were investigated.

Results:
Among the 1403 patients, PVT occurred in 33 cases, giving a frequency of 2.4%. In univariate analyses, female sex (P = 0.03), portal vein reconstruction (P = 0.01), and left lateral sectionectomy (P < 0.001) were significant risk factors for PVT. On multivariate analysis, portal vein reconstruction (P = 0.01) and left lateral segmentectomy (P < 0.001) remained significant risk factors for PVT. The management options for PVT were thrombectomy, antithrombotic therapy, and observation. With antithrombotic therapy, 96.4% of patients achieved PVT resolution. Among patients who underwent hepatectomy with portal vein reconstruction, the PVT site was the main trunk of the portal vein in all 3 cases, and thrombectomy was performed in 2 cases. No perioperative mortality was observed.

Conclusions:
In the present study, portal vein reconstruction and left lateral sectionectomy were identified as risk factors for PVT after hepatectomy. As PVT can be fatal, early detection and appropriate treatment according to the status of PVT are important.
Key Genes and Biological Pathways in Pulmonary Arterial Hypertension Related to Endoplasmic Reticulum Stress Identified by Bioinformatics
Authors: Wang Shanzuan , Zhuo Debin , Lin Juan , Zhang Chunxia 
Published: November 2024

Abstract:
Pulmonary arterial hypertension (PAH) is a cardiopulmonary vascular condition with an unclear pathogenesis. Targeting endoplasmic reticulum (ER) stress has been suggested as a novel treatment approach for PAH, but the mechanisms involving ER stress–related genes in PAH are not well understood. Microarray data for PAH and ER stress–related genes were analyzed. Differential and Venn analyses identified 17 differentially expressed ER stress–related genes in PAH. Candidate drugs targeting these genes were predicted using the CMap database. A protein–protein interaction (PPI) network was constructed, and hub genes (LCN2, IGF1, VCAM1, EDN1, HMOX1, TLR4) with complex interplays were identified using the STRING database and Cytoscape plugins. The clinical diagnostic performance of the hub genes was evaluated using ROC curves. The GeneMANIA Web site was utilized to predict enriched pathways associated with the hub genes and their functionally similar genes. MiRNAs and transcription factors targeting the hub genes were predicted using the Networkanalyst Web site. The immune levels in control samples and PAH samples were assessed using various algorithms. Nine drug candidates were found to potentially target the identified ER stress–related genes. The hub genes and their correlated genes were significantly enriched in immune-related pathways. The PAH group showed increased immune cell infiltration, indicating a heightened immune response. This study sheds light on the role of ER stress–associated hub genes in PAH and proposes potential drugs targeting these genes. These findings provide valuable insights into PAH mechanisms and support the exploration of ER stress as a therapeutic target.
Insomnia and Chronic Pain Mediate the Relationship Between Traumatic Brain Injury and Reduced Positive Airway Pressure Adherence Among Veterans
Authors: Kinney Adam R. , Schneider Alexandra L. , Welsh Carolyn , Sarmiento Kathleen F. , Ulmer Christi S. , Forster Jeri E. , Abbott Zachary , Bahraini Nazanin H. 
Published: November 2024

Objective:
To examine whether co-morbid insomnia, post-traumatic stress disorder (PTSD), depression, and chronic pain mediate the relationship between traumatic brain injury (TBI) and positive airway pressure (PAP) treatment adherence.

Setting:
One Veterans Health Administration (VHA) sleep medicine site.

Participants:
Veterans (n = 8836) who were prescribed a modem-enabled PAP device.

Design:
Secondary analysis of clinical data. We used path analysis to examine: (1) whether Veterans with a history of TBI were more likely to experience insomnia, PTSD, depression, and chronic pain; (2) in turn, whether Veterans with these co-morbid conditions exhibited lesser PAP adherence; and (3) whether Veterans with a history of TBI will exhibit lesser PAP adherence, even while accounting for such co-morbid conditions. Model estimates were adjusted for sociodemographic (eg, race/ethnicity) and clinical characteristics (eg, mask leakage).

Main Measures:
Health conditions were abstracted from the VHA medical record. PAP adherence was measured using average nightly use (hours).

Results:
Among 8836 Veterans, 12% had a history of TBI. TBI history was not associated with PAP adherence when accounting for the presence of insomnia, PTSD, depression, and chronic pain. Indirect effect estimates indicated that a history of mild, moderate-severe, or unclassified TBI was associated with lesser PAP adherence, as mediated by the presence of co-morbid insomnia and chronic pain. Generally, TBI was associated with an increased likelihood of co-morbid insomnia, PTSD, depression, and chronic pain. In turn, insomnia and chronic pain, but not PTSD or depression, were associated with lesser PAP adherence.

Conclusions:
Our study offers empirical support for insomnia and chronic pain as potential explanatory mechanisms underlying the relationship between TBI history and suboptimal PAP adherence. While additional research is needed to confirm causality, findings offer preliminary evidence that can inform the development of tailored PAP adherence interventions for Veterans with TBI and obstructive sleep apnea.
EARLY SILICONE OIL OPACIFICATION IN THE ABSENCE OF EMULSIFICATION IS CAUSED BY AN INCREASED LEVEL OF SILICONE DIOXIDE
Authors: Hammer Maximilian , Britz Leoni , Böhmann Manuel Ben , Herbster Lorenz , Muuss Marcel , Herth Jonathan , Cionoiu Sebastian , Krisp Holger , Spitzer Martin Stephan , Wohlfart Sabrina , Uhl Philipp , Auffarth Gerd Uwe 
Published: November 2024

Background/Purpose:
In October 2023, other cases with early silicone oil opacification within hours after intraocular implantation in the absence of emulsification occurred. Although multiple, small series of this phenomenon are now documented during the past decade, the cause was never unmasked. In this study, we analyzed explanted patient samples, unused samples of the affected, and a control batch of the same silicone oil.

Methods:
The oils were examined on their optical and viscosimetric properties, interfacial tension, and for the presence of particles. Contamination was investigated using inductively coupled plasma mass spectrometry, thermogravimetric analyses, and Raman spectroscopy. Cytotoxicity examination in ARPE-19 cells was performed. The oil's effect on pH changes of aqueous solutions and the oil's defoaming ability were analyzed.

Results:
The affected batch passed all regulatory limits. However, the affected batch showed an elevated turbidity already before implantation. Three thousand–fold magnification revealed dispersed particles only in the affected batch. Contamination analyses revealed the absence of other elements, indicating a silicon-containing contamination. The affected batch showed no in vitro cytotoxicity but altered viscosimetric properties and a lower pH of the hydrophilic phase after inducing emulsification. Both batches did not show relevant defoaming properties.

Conclusion:
The results obtained combined with information from suppliers and the manufacturer suggest an elevated level of silica particles as the cause of the opacification. Based on these results, the manufacturer and suppliers of the latest affected batch adjusted cutoff values for turbidity measurements and introduced turbidity measurements of the raw material before distillation. Other manufacturers should follow these preventive measures.
Burnout and Turnover Among Veterans Health Administration Primary Care Providers From Fiscal Years 2017–2021
Authors: Apaydin Eric A. , Yoo Caroline K. , Stockdale Susan E. , Jackson Nicholas J. , Yano Elizabeth M. , Nelson Karin M. , Mohr David C. , Rose Danielle E. 
Published: November 2024

Objectives:
We examined how individual-level turnover among Veterans Health Administration primary care providers (PCPs) from fiscal years 2017 to 2021 was associated with health care system-level burnout and turnover intent.

Background:
Burnout among PCPs has been well documented in recent studies, but less is known about the potential relationship between burnout and turnover.

Methods:
We identified a national cohort of 6444 PCPs (physicians, nurse practitioners, and physician assistants) in 129 Veterans Health Administration health care systems in the first quarter of fiscal year 2017 and tracked their employment status for 20 quarters. PCP employment data on turnover were linked to annual health care system-level employee survey data on burnout, turnover intent, and other covariates. We performed logistic regression to estimate the impact of health care system-level burnout and turnover intent on individual PCP turnover, controlling for individual and health care system-level covariates and adjusting for clustering at the health care system level.

Results:
Median health care system-level burnout ranged from 42.5% to 52.0% annually, and turnover among PCPs ranged from 6.3% to 8.4% (mean = 7.0%; SD = 0.9%). Separation from employment was higher among employees at health care systems with the highest burnout (odds ratio =1.14; 95% CI = 1.01–1.29) and turnover intent (OR = 1.18; 95% CI = 1.03–1.35).

Conclusions:
PCPs in health care systems with high burnout are more likely to separate from employment. Policymakers and administrators seeking to improve retention should consider system-level interventions to address organizational drivers of burnout.
A Two-Stage Approach to Alveolar Clefts Repair with Combined Cortical and Cancellous Bone Grafting
Authors: Jing Bingshuai , Yao Meilin , Tsauo Chialing , Luo Xiao , Shi Bing , Zheng Qian , Li Chenghao 
Published: November 2024

Background:
Achieving optimal efficacy in secondary alveolar bone grafting (SABG) poses a considerable challenge for patients with alveolar clefts post-canine eruption. This study introduces a novel technique called the "two-stage SABG" to improve the treatment outcomes for patients who have missed the optimal timing for bone grafting.

Methods:
Patients aged 12 and above, presenting with unilateral, complete alveolar clefts after canine eruption, were divided into two cohorts: conventional and two-stage groups. The two-stage group underwent oronasal fistula closure and mucoperiosteal sealing during the initial stage, followed by particulate cancellous bone marrow (PCBM) and mandibular cortical bone grafting in the second stage after a three-month interval. Six months after surgery, the SABG was evaluated quantitatively and qualitatively using computed tomography (CT).

Results:
A total of 81 patients (median age: 14 years; male/female: 49/32) were included in the conventional group, while the two-stage group consisted of 33 patients (19 years; 20/13). The two-stage group exhibited significantly superior outcomes (P < 0.01) in terms of radiographic healing rate (> 4 points) (96.97% vs. 55.56%), bone bridge height (12.17mm, IQRs=4.26mm), bone bridge width (9.09mm, IQRs=2.74mm), bone formation rate (69.73%, IQRs=22.73%), and bone resorption rate (48.85%, IQRs=22.57%). Additionally, the average three-dimensional deviations greater than 3.5mm at the affected piriform aperture margin.

Conclusions:
The novel two-stage SABG approach demonstrates significant benefits in the repair of alveolar clefts and pyriform foramen deformities through combined cortical and cancellous bone grafting.
Refining a Multidisciplinary “Vasculo-plastic” Approach to Limb Salvage: An Institutional Review Examining 300 Lower Extremity Free Flaps
Authors: Li Karen R. , Huffman Samuel S. , Gupta Nisha J. , Truong Brian N. , Lava Christian X. , Rohrich Rachel N. , Atves Jayson N. , Steinberg John S. , Akbari Cameron M. , Youn Richard C. , Attinger Christopher E. , Evans Karen K. 
Published: November 2024

Background:
The use of free tissue transfer (FTT) is effective for chronic, non-healing lower extremity (LE) wounds, requiring collaboration across plastic, vascular, podiatric, orthopedic, and infectious disease disciplines for comprehensive treatment plants to optimize limb salvage. This study aims to describe our vasculo-pathic approach with 300 LE FTTs, comparing outcomes between the first 200 LE FTT and the most recent 100 procedures performed.

Methods:
A single-institution, retrospective review of 300 LE FTTs from July 2011 to January 2023 was performed. Patients were compared between the first 200 (Group 1, July 2011 – February 2020) and last 100 flaps (Group 2, February 2020 – January 2023) performed. Patient characteristics, preoperative management, intraoperative details, and outcomes were collected.

Results:
Group 2 patients had significantly higher rates of diabetes (67.0% vs. 48.5%, p=0.002), peripheral vascular disease (56.0% vs. 24.5%, p<0.001), history of venous thromboembolisms (13.0% vs. 6.0%, p=0.039), venous reflux (81.9% vs. 67.8%; p=0.028), and preoperative venous thromboses on venous testing (25.5% vs. 10.5%; p=0.003) compared to Group 1. Group 2 underwent more pre-FTT endovascular interventions (23.0% vs. 16.5%, p=0.039) and vascular bypasses (4.0% vs. 0.0%, p =0.012). While immediate flap success and amputation rates were similar between the groups, Group 2 had higher rates of partial flap necrosis (7% vs. 3%; p=0.012).

Conclusions:
The adoption of a vasculo-plastic approach allows LE FTT to remain successful and achieve long-term limb salvage despite a highly comorbid population.