bluuebunny/crossref_metadata_2025_split huggingface dataset:
An efficient solid shell material point method for large deformation of thin structures
Authors: Li Jiasheng , Ni Ruichen , Zeng Zhixin , Zhang Xiong 
Published: September 2023

AbstractThe standard material point method (MPM) encounters severe numerical difficulties in simulating shell structures. In order to overcome the shortcomings of locking effects, the discretization size of background grid should be small enough, usually smaller than 1/5 of the shell thickness, which however will lead to prohibitive computational cost. A novel solid shell material point method (SSMPM) is proposed to efficiently model the large deformation of thin structures. The SSMPM describes the material domain of shell structures by shell particles with hexahedral particle domains. The locking treatments of solid shell element are then introduced in SSMPM, which results in the correction of strain field throughout the shell thickness. Namely, the assumed natural strain (ANS) method is adopted to eliminate the shear locking and trapezoidal locking, while the enhanced assumed strain (EAS) method is employed to eliminate the thickness locking. With the precise description of bending modes, a single layer of particles and a coarse background grid could be used in shell structure simulations with the SSMPM, which dramatically increases the computational efficiency. A local multi‐mesh contact method is presented to naturally couple SSMPM and MPM for the contact situations of shells with other objects. Several numerical examples, including beam vibration, pinched cylinder with free edges and full hemispherical shell, are performed to verify and validate the SSMPM, which shows that the SSMPM considerably outperforms the standard MPM in these situations. A fluid–structure interaction problem and the penetration of a thin plate are investigated based on the contact method and the results are in good agreement with those in the literature.
Complications of Novel Radiofrequency Device Use in Rhinology: A MAUDE Analysis
Authors: Torabi Sina J. , Bitner Benjamin F. , Abello Eric H. , Nguyen Theodore V. , Wong Brian J.F. , Kuan Edward C. 
Published: September 2023

AbstractWith the widespread adoption of intranasal radiofrequency (RF) devices, our objective was to report national adverse events (AEs) associated with their use. The Food and Drug Administration's Manufacturer and User Facility Device Experience was queried. A total of 24 device‐related AEs were reported, 11 (45.8%) for Celon® (Olympus), 3 (12.5%) for Vivaer® (Aerin), 2 (8.3%) for Neuromark® (Neurent), and 8 (33.3%) for Rhinaer® (Aerin). Seven (63.6%) of the Celon®‐related complications were related to tissue necrosis (largely user error‐related), but 1 (9.1%) episode of pediatric ocular palsy was also reported. Vivaer® complications included synechiae formation, a mucosal perforation, and a case of empty nose syndrome. Of the posterior nasal nerve ablating devices, 9 of 10 AEs were epistaxes, of which 7 (77.8%) required operative intervention. Surgeons should exercise vigilance and tissue‐appropriate device settings when utilizing RF devices. Epistaxis and tissue necrosis may occur, as well as more rare, but devastating, complications.
Impact of Frailty on Postoperative Outcomes in Extended Endonasal Skull Base Surgery for Suprasellar Pathologies
Authors: Kshirsagar Rijul S. , Eide Jacob G. , Qatanani Anas , Harris Jacob , Abello Eric H. , Roman Kelsey M. , Vasudev Milind , Jackson Christina , Lee John Y.K. , Kuan Edward C. , Palmer James N. , Adappa Nithin D. 
Published: September 2023

AbstractObjectiveFrailty metrics estimate a patient's ability to tolerate physiologic stress and there are limited frailty data in patients undergoing expanded endonasal approaches (EEA) for suprasellar pathologies. Elevated frailty metrics have been associated with increased perioperative complications in patients undergoing craniotomies. We sought to examine this potential relationship in EEA.Study DesignRetrospective cohort study.SettingTwo tertiary academic skull base centers.MethodsCases of patients undergoing EEA for suprasellar pathologies were reviewed. Demographic, treatment, survival, and postoperative outcomes data were recorded. Frailty was calculated using validated indexes, including the American Society of Anesthesiologists (ASA) classification, the modified 5‐item frailty index (mFI‐5), and the Charlson comorbidity index (CCI). Primary outcomes included 30‐day medical and surgical complications.ResultsA total of 88 patients were included, with 59 (67%) female patients and a mean age of 54 ± 15 years. The most common pathologies included 53 meningiomas (60.2%) and 21 craniopharyngiomas (23.9%). Most patients were ASA class 3 (54.5%) with mean mFI‐5 0.82 ± 1.01 and CCI 4.18 ± 2.42. There was no association between increased frailty and 30‐day medical or surgical outcomes (including postoperative cerebrospinal fluid leak), prolonged length of hospital stay, or mortality (all P > .05). Higher mFI‐5 was associated with an increased risk for 30‐day readmission (odds ratio: 2.35, 95% confidence Interval: 1.10‐5.64, P = .04).ConclusionDespite the patient population being notably frail, we only identified an increased risk for 30‐day readmission and observed no links with deteriorating surgical, medical, or mortality outcomes. This implies that conventional frailty metrics may not effectively align with EEA outcomes.
Multicriteria GIS‐based analysis for the evaluation of the vulnerability of the marine environment in the Gulf of Trieste (north‐eastern Adriatic Sea) for sustainable blue economy and maritime spatial planning
Authors: Pagano Mariangela , Fernetti Michele , Busetti Martina , Ghribi Mounir , Camerlenghi Angelo 
Published: September 2023

Abstract

The Gulf of Trieste, is a shallow semi‐enclosed sea of about 500 km2 in the north‐eastern part of the Adriatic Sea. The coastal and marine areas of the Italian region Friuli Venezia Giulia, which borders most of the Gulf of Trieste, are subject to significant pressure from human activities, especially in terms of maritime traffic, ports, industry, fishing and tourism. But they are also characterised by natural areas of high environmental value. We wanted to understand the human impact on these coastal and marine areas in order to better inform sustainable management.

To carry out the analysis, we collected a range of anthropogenic (human) and environmental data, from which we produced a series of indicator maps. By combining the various indicators, we created two subsequent maps: the seabed vulnerability map and the marine environment vulnerability map in the area as a whole. The analysis has highlighted areas with different degrees of environmental vulnerability due to human development and identified the most critical areas in the Gulf of Trieste with high anthropogenic pressure. Both maps show that human impacts affect large areas of the seabed and marine environment, while those with minimal or non‐existent impacts are very limited and are related mainly to areas with high levels of existing protection and conservation.

The seabed vulnerability map shows that the biggest problems are related to discharge of dredging sludge, mollusc fishing with dredgers and turbo blowers, and anchoring boats. Furthermore, the presence of anthropogenic elements on the seabed can damage the natural environment and even permanently alter the natural shape and structure of the seabed. The marine environment vulnerability map shows that ports, urbanisation, industrial activities, maritime traffic and fishing pressure affect the entire study area.

The vulnerability maps are a useful analytical tool to identify the most critical areas where possible actions can be planned to maintain a healthy and sustainable productive marine environment and to manage and resolve the conflicts between economic development and environmental health.

Read the free Plain Language Summary for this article on the Journal blog.
Research progress of composite cylindrical shells
Authors: Zhang Liwei , Zhao Liyuan , Pan Lin , Gao Jiangang 
Published: September 2023

AbstractComposite cylindrical shell (CCS) structure are a number of engineering applications in aerospace, civil engineering, ordnance industry, sports equipment and other fields because of their excellent mechanical properties, low density and strong design. In this study, the classification, preparation technology and mechanical test of CCS are summarized. The research on the axial compression strength of CCS is reviewed. The theory of axial compression elasticity and the strength criterion of orthotropic composite materials are analyzed, and the strength criterion is compared. Finally, the basic theory of instability and buckling is deeply analyzed, and the stability theory of CCS is analyzed in detail. In order to provide a new reference for future scientific research and engineering application, the research difficulties are given in the conclusion, and the future research direction is predicted.Highlights
Comparing and analyzing the classification, preparation technology and mechanical properties of composite cylindrical shells (CCS) comprehensively.
Summarizing and analyzing the axial compression strength of CCS in depth, and analyzing the theory of axial compression elasticity and the strength criterion of orthotropic composite materials thoroughly.
Analyzing the basic theory of instability and buckling in depth, and analyzing the stability theory of CCS in detail.
Giving the research difficulty of composite cylindrical shell, and predicting the future development direction of CCS.
SiO nanoparticle modified CFRP composites effecting on mechanical and vibration damping properties
Authors: Bozkurt Yüksel Tokur , Bulut Mehmet , Erkliğ Ahmet , Özbek Özkan 
Published: September 2023

AbstractSiO nanoparticle inclusion effects on vibration‐damping and mechanical properties of carbon fiber reinforced plastic composites (CFRP) were experimentally investigated by incorporating the NS particles into the epoxy resin system. The nanoparticles in the SiO form were incorporated into the epoxy resin at different ratios (0.5%, 1%, 1.5%, 2%, and 3%) in weight to produce the modified CFRP samples. In addition, the effects of cutout with two different types (edgewise semicircular and central circular) on the vibration response of SiO modified CFRP test samples were determined for different SiO particle incorporation ratios. In this way, variation of both mechanical and vibration properties was experimentally determined in terms of cutout weakening of the composite in the middle while incorporating the SiO particle modification of the CFRP composites. It was seen from this study that the incorporation SiO nanoparticles into CFRP composites were provided the increasing trend in the vibration‐damping and mechanical properties and the highest mechanical and vibration properties were obtained for the addition of 1.5 wt% SiO nanoparticles. On the other hand, further SiO nanoparticle addition, more than 1.5–2 wt%, decreased in mechanical and vibration properties of the composite test samples.Highlights
SiO nanoparticle effects on mechanical properties of CFRP composite laminates.
SiO nanoparticle effects on vibration damping of CFRP composite laminates.
Central cutout effects on vibration characteristics of CFRP composite laminates.
Fracture characteristics of CFRP composite laminates with SiO nanoparticle incorporation.
Fiberglass‐reinforced triply periodic minimal surfaces (TPMS) lattice structures for energy absorption applications
Authors: Ormiston Shaun , Srinivas Sundarram Sriharsha 
Published: September 2023

AbstractTriply periodic minimal surfaces (TPMS)‐based lattice structures exhibit improved mechanical and energy absorption properties compared to other lattices. Fused filament fabrication is the preferred approach for fabricating these structures and majority of the existing TPMS structures are manufactured using a single polymer. This study presents composite lattice structures that are reinforced with a second material. TPMS lattice structures are designed using MSLattice and modeled into cubical, cylindrical, bar, and dogbone geometries with relative density levels of 25%, 50%, and 75%. The structures are 3D printed with micro carbon fiber‐embedded nylon as the base matrix and fiberglass as the reinforcement. The structures are then characterized for mechanical properties and energy absorption as a function of density. The results show that the 25% relative density fiberglass‐reinforced structures exhibited similar or better properties compared to the 75% density structures without reinforcement. The mass normalized maximum force withstood by the 25% density‐reinforced cylinder was 1340 N/g compared to 1219 N/g for the 75% density non‐reinforced cylinder, clearly demonstrating the benefits of adding fiberglass. The 25% density cylindrical samples' energy absorption capacity increased on an average by 24.8% with the addition of fiberglass. The 25% density bar and dogbone samples' exhibited the highest improvement with the addition of fiberglass with an increase in stress capacity of 64.6% and 113%, respectively. These findings suggest that these lightweight composite TPMS structures can be a promising candidate for energy absorption applications such as the crumple zones in automobiles.Highlights
Gyroid structure modeled with 25%, 50% and 75% density in different geometries.
Structures 3D printed with onyx fiber and reinforced with fiberglass.
Reinforced cylindrical samples' energy absorption capacity increased by 24.8%.
Bar and dogbone samples' maximum stress capacity doubled with reinforcement.
Composite TPMS structures are good candidate for energy absorption application.
Why mismatch negativity continues to hold potential in probing altered brain function in schizophrenia
Authors: Todd Juanita , Salisbury Dean , Michie Patricia T. 
Published: September 2023

AbstractThe brain potential known as mismatch negativity (MMN) is one of the most studied indices of altered brain function in schizophrenia. This review looks at what has been learned about MMN in schizophrenia over the last three decades and why the level of interest and activity in this field of research remains strong. A diligent consideration of available evidence suggests that MMN can serve as a biomarker in schizophrenia, but perhaps not the kind of biomarker that early research supposed. This review concludes that MMN measurement is likely to be most useful as a monitoring and response biomarker enabling tracking of an underlying pathology and efficacy of interventions, respectively. The role of, and challenges presented by, pre‐clinical models is discussed as well as the merits of different methodologies that can be brought to bear in pursuing a deeper understanding of pathophysiology that might explain smaller MMN in schizophrenia.
The association between wealth and sleep medication use in a nationally‐representative sample of older Medicare beneficiaries
Authors: Musty Allison , Lund Jennifer L. , Yang Yang Claire , Niznik Joshua , Shmuel Shahar , Duchesneau Emilie D. 
Published: September 2023

AbstractBackgroundSleep disorders are common among older adults, leading to high prevalence of over‐the‐counter and prescription sleep medication use. Socioeconomically disadvantaged individuals have higher prevalence of sleep disorders. Frequent use of sleep medications can increase the risk of falls. Little is known about the association between wealth and sleep medication use in older adults.MethodsWe conducted a cross‐sectional analysis using a nationwide sample of 7603 Medicare beneficiaries (65+ years) from Round 1 (2011) of the National Health and Aging Trends Study. We measured self‐reported wealth as the sum of assets (retirement savings, stocks/bonds, checking/savings accounts, business assets, and home value) minus liabilities (mortgage, credit card, and medical debt). Self‐reported sleep medication use in the past month was categorized as frequent (5–7 nights/week), sometimes (1–4 nights/week), or never (0 night/week). We estimated differences in the prevalence of sleep medication use by quintiles of wealth using crude and adjusted binomial regression models. Individuals missing sleep medication information were excluded.ResultsMedian wealth was $152 582 (IQR: $24 023–412 992). Sixteen percent reported frequent sleep medication use, 15% reported some use, and 70% reported no use. Frequent sleep medication use was more common in lower wealth quintiles (lowest: 20%, highest: 12%). Alternatively, some use was more common in higher wealth quintiles (lowest: 11%, highest: 18%). Results were similar after adjustment for demographic factors, anxiety, depression, and sleep disorders.ConclusionsIn this study, less wealthy older adults had higher prevalence of frequent sleep medication use. This may lead to dependency or increased fall risk in this vulnerable population.
Preparation and anticorrosion performance of nano polyaniline/polyurethane interpenetrating network composite coating
Authors: Xu Zhenhua , Yu Huan , Fang Tao , Zhang Man , Liu Jiesheng , Tan Xiaoming 
Published: September 2023

AbstractPolyaniline−dodecylbenzene sulfonic acid (PANI‐DBSA) particles were synthesized through in situ lotion polymerization of aniline and DBSA as raw materials, followed by combining with epoxy resin (E‐44) and castor oil (CO) to prepare a PANI mixture (PANI‐DBSA/CO) which was used as a nanofiller to create a nano polyaniline/polyurethane (PANI‐PU) interpenetrating polymer network (IPN) coating. SEM, XRD and Fourier transform infrared spectroscopy were used to characterize the PANI‐DBSA and PANI‐PU IPN composite coatings that were produced. The coatings’ physical and mechanical characteristics were investigated, as well as the system's corrosion behaviour in 3.5 wt% NaCl solution, utilizing electrochemical impedance spectroscopy and electrokinetic polarization. Acid, alkali and saltwater immersion investigations were used to further evaluate the coatings’ medium resistance. The results show that when PANI‐DBSA is added at 1 wt%, the contact angle reaches 102.6°, the adhesion reaches S1 grade after 720 h immersion, the tensile strength is 16.22 MPa and the elongation reaches 208%. The impedance value of the composite coating grew by 569 times with the addition of 1 wt% PANI, and the resistance duration to 10 wt% H2SO4, 10 wt% NaOH and 3.5 wt% NaCl reached more than 90 days. The addition of PANI to IPN coatings can increase corrosion resistance and extend their application range. © 2023 Society of Industrial Chemistry.
Light in SmI2‐mediated chemistry: Synthetic applications and mechanistic studies
Authors: Patra Subhasmita , Satapathy Sipramayee , Rath Aswini , Nayak Akash Kumar , Maity Sandeepan 
Published: September 2023

AbstractSmI2 is a versatile reagent in single electron transfer‐mediated reductive transformations. Photoexcitation of SmI2 generates a reactive excited state capable of transferring an electron to substrates that are recalcitrant towards accepting electrons. Synthetic results unequivocally indicate light as a green and sustainable promoter of SmI2‐mediated chemistry, with the potential to replace the suspected carcinogen hexamethylphosphoramide (HMPA). Rate constants of photoinduced electron transfer from SmI2 are in the range of 107–109 M−1 s−1, which are an order of magnitude higher in comparison with the ground state process. Recent advancement in EuII‐ and CeIII‐based photo‐redox catalysis rejuvenated the area of photo‐catalyzed reactions of low‐valent lanthanides. This review article aims to illustrate the role of photoexcitation on SmI2‐mediated reductive transformations.
Investigating protein‐membrane interactions using native reverse micelles constructed from naturally sourced lipids
Authors: Walters Sara H. , Castillo Abdul J. , Develin Angela M. , Labrecque Courtney L. , Qu Yun , Fuglestad Brian 
Published: September 2023

AbstractAdvancing the study of membrane associated proteins and their interactions is dependent on accurate membrane models. While a variety of membrane models for high‐resolution membrane protein study exist, most do not reflect the diversity of lipids found within biological membranes. In this work, we have developed native reverse micelles (nRMs) formulated with lipids from multiple eukaryotic sources, which encapsulate proteins and enable them to interact as they would with a biological membrane. Diverse formulations of nRMs using soy lecithin, porcine brain lipids, or bovine heart lipids combined with n‐dodecylphosphocholine were developed and characterized by dynamic light scattering and 31P‐NMR. To optimize protein encapsulation, ubiquitin was used as a standard and protein NMR verified minimal changes to its structure. Peripheral membrane proteins, which bind reversibly to membranes, were encapsulated and include glutathione peroxidase 4 (GPx4), phosphatidylethanolamine‐binding protein 1 (PEBP1), and fatty acid binding protein 4 (FABP4). All three proteins showed anticipated interactions with the membrane‐like inner surface of the nRMs as assessed by protein NMR. The nRM formulations developed here allow for efficient, high‐resolution study of membrane interacting proteins up to and beyond ~21 kDa, in a more biologically relevant context compared to other non‐native membrane models. The approach outlined here may be applied to a wide range of lipid extracts, allowing study of a variety of membrane associated proteins in their specific biological context.
Landscape‐scale spatiotemporal dynamics of Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) populations: implications for spatially‐based pest management
Authors: Park Yong‐Lak , Choi Kyungsan , Cullum John , Hoelmer Kim A. , Weber Donald C. , Morrison William R. , Rice Kevin B. , Krawczyk Greg , Fleischer Shelby J. , Hamilton George , Ludwick Dalton , Nielsen Anne L. , Kaser Joseph , Polk Dean , Shrewsbury Paula M. , Bergh J. Christopher , Kuhar Thomas P. , Leskey Tracy C. 
Published: September 2023

AbstractBACKGROUNDBrown marmorated stink bug (BMSB), Halyomorpha halys (Stål), is an invasive and severe pest of specialty and row crops. A 2‐year field study conducted in four Mid‐Atlantic states in the USA characterized the spatial and temporal dynamics of BMSB populations and its association with landscape elements in commercial agriculture settings. In each state, two 1 km2 sites included typical landscape elements (i.e., tree fruit orchards, annual field and vegetable crops, woodlands, and human‐made structures). Twenty‐seven georeferenced pheromone traps were deployed per site and the number of BMSB adults and nymphs captured was counted throughout the growing season.RESULTSFindings from spatial analysis by distance indices, along with time‐series maps of BMSB distribution, showed that BMSB exhibited significant spatial aggregation, and that its distribution was spatially consistent between years. Analyses with geographic information systems (GIS) revealed that BMSB ‘hot spots’ occurred in different landscape elements throughout each season. Most patches (i.e., clusters of significantly higher trap captures) were found near woodlands early in the season, near tree fruit orchards in summer, and on the border of annual field crops in autumn. Buffer analysis with GIS indicated that more BMSB adults were captured closer to woodlands compared with other landscape elements.CONCLUSIONUnderstanding the spatial and temporal movement and distribution of BMSB is critical to predicting their potential impact and ultimately devising strategies to mitigate this risk to vulnerable crops. The results of this study can be used to design streamlined, spatially‐based areawide management of BMSB in heterogeneous and complex agricultural landscapes. © 2023 Society of Chemical Industry. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.