bluuebunny/crossref_metadata_2025_split huggingface dataset:
Network Uncertainty Quantification for Analysis of Multi-Component Systems
Authors: Tencer John , Rojas Edward , Schroeder Benjamin B. 
Published: September 2022

Abstract
In order to impact physical mechanical system design decisions and realize the full promise of high-fidelity computational tools, simulation results must be integrated at the earliest stages of the design process. This is particularly challenging when dealing with uncertainty and optimizing for system-level performance metrics, as full-system models (often notoriously expensive and time-consuming to develop) are generally required to propagate uncertainties to system-level quantities of interest. Methods for propagating parameter and boundary condition uncertainty in networks of interconnected components hold promise for enabling design under uncertainty in real-world applications. These methods avoid the need for time consuming mesh generation of full-system geometries when changes are made to components or subassemblies. Additionally, they explicitly tie full-system model predictions to component/subassembly validation data which is valuable for qualification. These methods work by leveraging the fact that many engineered systems are inherently modular, being comprised of a hierarchy of components and subassemblies that are individually modified or replaced to define new system designs. By doing so, these methods enable rapid model development and the incorporation of uncertainty quantification earlier in the design process. The resulting formulation of the uncertainty propagation problem is iterative. We express the system model as a network of interconnected component models, which exchange solution information at component boundaries. We present a pair of approaches for propagating uncertainty in this type of decomposed system and provide implementations in the form of an open-source software library. We demonstrate these tools on a variety of applications and demonstrate the impact of problem-specific details on the performance and accuracy of the resulting UQ analysis. This work represents the most comprehensive investigation of these network uncertainty propagation methods to date.
Mechanism Design and Control of a Winged Hovering Robot With Flapping Angle Constraint
Authors: Vejdani Hamid , Haji LaRance , Fernandez Vernon , Jawad Badih 
Published: September 2022

Abstract
In this paper, we first presented a four-bar linkage mechanism for actuating the wings in a flapping wing flying robot. After that, given the additional constraints imposed by the four-bar linkage, we parameterized the wing kinematics to provide sufficient control authority for stabilizing the system during 3D hovering. The four-bar linkage allows the motors to spin continuously in one direction while generating flapping motion on the wings. However, this mechanism constrains the flapping angle range which is a common control parameter in controlling such systems. To address this problem, we divided each wingbeat cycle into four variable-time segments which is an extension to previous work on split-cycle modulation using wing bias but allows the use of a constant flapping amplitude constraint for the wing kinematic. Finally, we developed an optimization framework to control the system for fast recovery while guaranteeing the stability. The results showed that the proposed control parameters are capable of creating symmetric and asymmetric motions between the two wings and, therefore can stabilize the hovering system with minimal actuation and flapping angle amplitude constraint.
Time-Dependent Sensitivity of Structural Reliability Assessment to Multi-Source Uncertainties Using Lamb Wave
Authors: Luan Chao , Guan Xuefei , He Jingjing 
Published: September 2022

Abstract
This article investigates the time-dependent sensitivity of structural reliability assessment to multisource uncertainties using Lamb wave. To precisely model the influence of local damage on the structure in the course of damage growth, a surface damage effect model is proposed to obtain the equivalent elasticity modulus, which can be coupled with the structure model. The evolution of the surface damage is modeled using the fatigue crack propagation model. Furthermore, by setting up the component and structure failure criteria, the time-dependent reliability model of the structure under multisource uncertainties from Lamb wave detection and material properties is established. The method of score function is employed to evaluate the sensitivity index, which is defined as the derivative of the reliability with respect to the distribution parameters of uncertain variables. A spatial truss structure is used to demonstrate the overall procedure. Numerical results show that the sensitivities indices are time and damage size dependent. The sensitivity contributions from Lamb wave quantification model and the material properties are comparable when the crack size is relatively small. When the crack grows to a larger size, the reliability assessment result is much more sensitive to uncertainties associated with material properties.
Computational Study of Tear Testing of a Single Weld Formed by Fused Filament Fabrication
Authors: Wang Zheliang , Agarwal Ojaswi , Seppala Jonathan E. , Hemker Kevin J. , Nguyen Thao D. 
Published: September 2022

Abstract
The tear test is widely used to measure the fracture toughness of thin rubber sheets and polymer films. More recently, the tear test has been applied to polymer materials produced by melt extrusion additive manufacturing to measure the fracture toughness of a single weld between two printed (extruded) filaments. This paper presents a finite element modeling study of the tearing of a weld between two printed filaments to investigate the mechanics of the tear test and the effects of geometry and material properties on the measured tear energy. The mechanical behavior of the printed filaments was described by a viscoplastic model for glassy polymers and the weld was represented using cohesive surface elements and the Xu–Needleman traction–separation relationship. The geometric model and the material parameters were chosen based on experimental measurements. The tear energy varied with the specimen dimensions, the curvature of the printed filaments, the yield stress relative to the cohesive strength of the weld, and the post-yield stress drop. The effects of the hardening modulus were small. These factors altered the viscoplastic dissipation in the material ahead of the propagating crack tip. The results showed that viscoplastic dissipation could constitute a large fraction of the tear energy and is strongly affected by the specimen dimensions and the geometry and material properties of the printed filament. There was also considerable mode mixty in the tear energy. The findings can be used to design tear tests to measure the intrinsic fracture toughness of the weld.
Supplemental Material: Hematite accommodated shallow, transient Pleistocene slow slip in the exhumed southern San Andreas fault system, California, USA
Authors: DiMonte Alexandra A. , al. et 
Published: September 2022

<p>Method details for SEM and grain-size analyses, hematite (U-Th)/He analyses, alpha-ejection correction derivation and calculations, as well as a discussion of data outliers and disequilibrium; and three tables and 11 additional figures including field, sample, and aliquot photographs; SEM images; schematic for alpha-ejection calculation; and additional hematite (U-Th)/He data plots. </p>
Development of Disturbances in a Circular Submerged Jet with Two Instability Modes
Authors: Abdul’manov K. E. , Nikitin N. V. 
Published: September 2022

Abstract
The stability and nonlinear interaction between the disturbances in a round jet are investigated numerically at Re = 2850. The conditions of the laboratory experiment performed earlier in the Institute of Mechanics of Moscow State University are reproduced. The characteristic feature of the jet considered is the presence of three points of inflection in the inflow velocity profile. This fact determines essentially the properties of flow. Linear stability is investigated using two approaches: quasi-parallel and spatial. Good quantitative agreement between the results of two approaches and adequate agreement with the results of inviscid theory are obtained. Numerical calculations are carried out with the aim to explain and interpret the results of the laboratory experiment in which change in the length of the laminar-turbulent transition zone in the jet under the action of time-periodic axisymmetric perturbations is revealed. It is shown that axisymmetric disturbances of even considerable initial amplitude do not lead to laminar-turbulent transition. The transition observed experimentally is attributable to the presence of non-controlled three-dimensional disturbances that are strengthened against the background of fairly intense artificial disturbances. The investigations carried out in the present study confirm this hypothesis. Thus, the three-dimensional disturbances serve as an initiator of transition, while the axisymmetric disturbances of a fairly high amplitude only accelerate their growth. It is shown that more intense three-dimensional disturbances are able to ensure still more rapid transition even in the absence of axisymmetric component.
Bioindicators of the Upper Neopleistocene Karginsky and Sartansky Deposits of the Kolyma Lowland and Features of Their Taphonomy under Multiple Exposure to Cryogenic Factors
Authors: Zanina O. G. , Lopatina D. A. 
Published: September 2022

Abstract
The paper presents the results of the study of Karginsky and Sartansky deposits of the Kolyma Lowland, synchronous with marine isotope stages (MIS) 3 and 2, and microphytofossils from them. During the accumulation of Karginsky deposits, various landscapes existed in this territory: communities of humid and dryish tundras, larch sparse forests, and tundra swamps, including habitats occupied by pioneer and steppe vegetation. The Sartansky deposits were formed under more uniform, cold and dry conditions. The results of the microbiomorphic study indicate the predominance of tundra herbaceous, mainly cereal associations in combination with the moss cover. Satisfactory preservation of microphytofossils from these strata is due to the specificity of the cryolithozone with a predominance of low temperatures throughout the year and low microbiological activity. The presence of spores and pollen with physical damage (ruptures and cracks) and corroded forms of phytoliths can be associated with their presence in the seasonally thawed layer during alternating freezing and thawing cycles.
Experiences of violence and discrimination among LGBTQ+ individuals during the COVID-19 pandemic: a global cross-sectional analysis
Authors: Adamson Tyler , Lett Elle , Glick Jennifer , Garrison-Desany Henri M , Restar Arjee 
Published: September 2022

ObjectivesTo characterise the extent to which the levels of violence and discrimination against lesbian, gay, bisexual, transgender and queer (LGBTQ+) people have changed amid COVID-19.DesignCross-sectional, secondary analysis.Setting79 countries.ParticipantsAll adults (aged ≥18 years) who used the Hornet social networking application and provided consent to participate.Main outcome measureThe main outcome was whether individuals have experienced less, or the same or more levels of discrimination and violence from specific groups (eg, police and/or military, government representatives, healthcare providers).Results7758 LGBTQ+ individuals provided responses regarding levels of discrimination and violence. A majority identified as gay (78.95%) and cisgender (94.8%). Identifying as gay or queer was associated with increased odds of experiencing the same or more discrimination from government representatives (OR=1.89, 95% CI 1.04 to 3.45, p=0.045) and healthcare providers (OR=2.51, 95% CI 0.86 to 7.36, p=0.002) due to COVID-19. Being a member of an ethnic minority was associated with increased odds of discrimination and violence from police and/or military (OR=1.32, 95% CI 1.13 to 1.54, p=0.0) and government representatives (OR=1.47, 95% CI 1.29 to 1.69, p=0.0) since COVID-19. Having a disability was significantly associated with increased odds of violence and discrimination from police and/or military (OR=1.38, 95% CI 1.15 to 1.71, p=0.0) and healthcare providers (OR=1.35, 95% CI 1.07 to 1.71, p=0.009).ConclusionsOur results suggest that despite the upending nature of the COVID-19 pandemic, around the world, government representatives, policymakers and healthcare providers continue to perpetuate systemic discrimination and fail to prevent violence against members of the LGBTQ+ community.
Economic impacts of overweight and obesity: current and future estimates for 161 countries
Authors: Okunogbe Adeyemi , Nugent Rachel , Spencer Garrison , Powis Jaynaide , Ralston Johanna , Wilding John 
Published: September 2022

IntroductionThe scope of the challenge of overweight and obesity (OAO) has not been fully realised globally, in part because much of what is known about the economic impacts of OAO come from high-income countries (HICs) and are not readily comparable due to methodological differences. Our objective is to estimate the current and future national economic impacts of OAO globally.MethodsWe estimated economic impacts of OAO for 161 countries using a cost-of-illness approach. Direct and indirect costs of OAO between 2019 and 2060 were estimated from a societal perspective. We assessed the effect of two hypothetical scenarios of OAO prevalence projections. Country-specific data were sourced from published studies and global databases.ResultsThe economic impact of OAO in 2019 is estimated at 2.19% of global gross domestic product (GDP) ranging on average from US$20 per capita in Africa to US$872 per capita in the Americas and from US$6 in low-income countries to US$1110 in HICs.If current trends continue, by 2060, the economic impacts from OAO are projected to rise to 3.29% of GDP globally. The biggest increase will be concentrated in lower resource countries with total economic costs increasing by fourfold between 2019 and 2060 in HICs, whereas they increase 12–25 times in low and middle-income countries. Reducing projected OAO prevalence by 5% annually from current trends or keeping it at 2019 levels will translate into average annual reductions of US$429 billion or US$2201 billion in costs, respectively, between 2020 and 2060 globally.ConclusionThis study provides novel evidence on the economic impact of OAO across different economic and geographic contexts. Our findings highlight the need for concerted and holistic action to address the global rise in OAO prevalence, to avert the significant risks of inaction and achieve the promise of whole-of-society gains in population well-being.
Maternity service reconfigurations for intrapartum and postnatal midwifery staffing shortages: modelling of low-risk births in England
Authors: Grollman Christopher , Daniele Marina A S , Brigante Lia , Knight Gwenan M , Latina Laura , Morgan Andrei S , Downe Soo 
Published: September 2022

IntroductionChoice of birth setting is important and it is valuable to know how reconfiguring available settings may affect midwifery staffing needs. COVID-19-related health system pressures have meant restriction of community births. We aimed to model the potential of service reconfigurations to offset midwifery staffing shortages.MethodsWe adapted the Birthrate Plus method to develop a tool that models the effects on intrapartum and postnatal midwifery staffing requirements of changing service configurations for low-risk births. We tested our tool on two hypothetical model trusts with different baseline configurations of hospital and community low-risk birth services, representing those most common in England, and applied it to scenarios with midwifery staffing shortages of 15%, 25% and 35%. In scenarios with midwifery staffing shortages above 15%, we modelled restricting community births in line with professional guidance on COVID-19 service reconfiguration. For shortages of 15%, we modelled expanding community births per the target of the Maternity Transformation programme.ResultsExpanding community births with 15% shortages required 0.0 and 0.1 whole-time equivalent more midwives in our respective trusts compared with baseline, representing 0% and 0.1% of overall staffing requirements net of shortages. Restricting home births with 25% shortages reduced midwifery staffing need by 0.1 midwives (–0.1% of staffing) and 0.3 midwives (–0.3%). Suspending community births with 35% shortages meant changes of –0.3 midwives (–0.3%) and –0.5 midwives (–0.5%) in the two trusts. Sensitivity analysis showed that our results were robust even under extreme assumptions.ConclusionOur model found that reconfiguring maternity services in response to shortages has a negligible effect on intrapartum and postnatal midwifery staffing needs. Given this, with lower degrees of shortage, managers can consider increasing community birth options where there is demand. In situations of severe shortage, reconfiguration cannot recoup the shortage and managers must decide how to modify service arrangements.
Shared decision-making in advanced kidney disease: a scoping review
Authors: Engels Noel , de Graav Gretchen N , van der Nat Paul , van den Dorpel Marinus , Stiggelbout Anne M , Bos Willem Jan 
Published: September 2022

ObjectivesTo provide a comprehensive overview of interventions that support shared decision-making (SDM) for treatment modality decisions in advanced kidney disease (AKD). To provide summarised information on their content, use and reported results. To provide an overview of interventions currently under development or investigation.DesignThe JBI methodology for scoping reviews was followed. This review conforms to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR) checklist.Data sourcesMEDLINE, Embase, Web of Science, Cochrane Library, Emcare, PsycINFO, PROSPERO and Academic Search Premier for peer-reviewed literature. Other online databases (eg, clinicaltrials.gov, OpenGrey) for grey literature.Eligibility for inclusionRecords in English with a study population of patients >18 years of age with an estimated glomerular filtration rate <30 mL/min/1.73 m2. Records had to be on the subject of SDM, or explicitly mention that the intervention reported on could be used to support SDM for treatment modality decisions in AKD.Data extraction and synthesisTwo reviewers independently screened and selected records for data extraction. Interventions were categorised as prognostic tools (PTs), educational programmes (EPs), patient decision aids (PtDAs) or multicomponent initiatives (MIs). Interventions were subsequently categorised based on the decisions they were developed to support.ResultsOne hundred forty-five interventions were identified in a total of 158 included records: 52 PTs, 51 EPs, 29 PtDAs and 13 MIs. Sixteen (n=16, 11%) were novel interventions currently under investigation. Forty-six (n=46, 35.7%) were reported to have been implemented in clinical practice. Sixty-seven (n=67, 51.9%) were evaluated for their effects on outcomes in the intended users.ConclusionThere is no conclusive evidence on which intervention is the most efficacious in supporting SDM for treatment modality decisions in AKD. There is a lot of variation in selected outcomes, and the body of evidence is largely based on observational research. In addition, the effects of these interventions on SDM are under-reported.
Sexual and reproductive health service utilization of young girls in rural Ethiopia: What are the roles of health extension workers? Community-based cross-sectional study
Authors: Jisso Meskerem , Feyasa Merga Belina , Medhin Girmay , Dadi Tegene Legese , Simachew Yilkal , Denberu Bisrat , Jebena Mulusew Gerbaba , Alemayehun Yibeltal Kiflie , Teklu Alula M 
Published: September 2022

ObjectiveLittle is known about the extent to which Health Extension Programme (HEP) has played its role to increase service uptake among young girls. This study aims to estimate the status of young girls’ sexual and reproductive health (SRH) services utilisation in rural Ethiopia and to examine the role of health extension workers (HEWs) in this regard.DesignA cross-sectional study.SettingA community-based study among all nine regions of Ethiopia.ParticipantsNine hundred and two young girls aged 15–24 years were included in this study.MethodWe used data from the national HEP assessment, collected from March to May 2019. Multilevel binary logistic regression was used to investigate the association between exposure to HEP and SRH services utilisation of young girls and we reported an adjusted OR with a corresponding 95% CI as measure of the degree of associations.ResultOnly 19.18% (95% CI 16.74% to 21.89%) of young girls used SRH services with significant regional variability (intraclass correlation coefficien=17.16%; 95% CI 6.30% to 39.99%). Exposure to HEP (adjusted OR, aOR 3.13, 95% CI 2.03 to 4.85), knowing about the availability of HEP services (aOR 3.06, 95% CI 1.75 to 5.33) and having good trust in HEWs (aOR 1.82, 95% CI 1.07 to 3.10) and other sociodemographic factors were significantly associated with increased SRH services utilisation.OutcomeSRH service utilisation.ConclusionAlthough the overall SRH service utilization of young girls in rural Ethiopia was very low, HEWs have a great contribution to improving service utilization of young girls through strong health education provided during home visits, school visits and at health posts. More investment along this line has the potential to improve service uptake among young girls. Encouraging HEWs to build trust among this segment of the population and creating awareness of SRH-related services is crucial to improv service uptake.