bluuebunny/crossref_metadata_2025_split huggingface dataset:
A tangential interpolation framework for the AAA algorithm
Authors: Aumann Quirin , Benner Peter , Gosea Ion Victor , Saak Jens , Vettermann Julia 
Published: September 2023

AbstractInterpolation‐based data‐driven methods, such as the Loewner framework or the Adaptive Antoulas‐Anderson (AAA) algorithm, are established and effective approaches to find a realization of a dynamical system from frequency response data (measurements of the system's transfer function). If a system‐theoretic representation of the original model is not available or unfeasible to evaluate efficiently, such reduced realizations enable effective analysis and simulation. This is especially relevant for models of interconnected dynamical systems, which typically have a high number of inputs and outputs to model their coupling conditions correctly.Tangential interpolation is an established strategy to construct accurate reduced‐order models while ensuring a reasonably small size even if many inputs and/or outputs have to be considered. In this contribution, we evaluate the applicability and effectiveness of data‐driven interpolation methods to compute reduced‐order models of dynamical systems with many inputs and outputs. Additionally, we extend AAA to a tangential interpolation setting and thus enable the use of AAA‐like methods in the context of transfer function interpolation for systems with many inputs and outputs.
Internal resonance in nonlinear structures—and what it can be used for
Authors: Tatzko Sebastian 
Published: September 2023

AbstractIn vibrating structures, nonlinear effects can play a decisive role. For example, stiffening responses can occur in integral components with low damping, but softening effects with a shift of the resonance to lower values by an increase of the vibration energy can be observed. Often these systems are considered only in a characteristic nonlinear vibration mode, allowing well‐known phenomena to be investigated. However, it may be the case that more than one nonlinear mode has a significant effect on the structural response of multi‐degree‐of‐freedom systems. If these modes take on integer multiples of frequency values, we speak of an internal resonance. In this work, the phenomenon of internal resonance is explained on the basis of a two‐mass oscillator. For this purpose, nonlinear modal analysis (NMA) is used to determine the amplitude‐dependent behavior of the resonant frequencies, referred to as nonlinear modes. These nonlinear modes already display the internal resonance in the form of characteristic trajectories, which are examined and explained in more detail here. A computational framework consisting of harmonic balance and continuation is used to calculate the nonlinear mode curves. In addition, nonlinear frequency responses are determined and their trajectories and properties in the internal resonance region are shown. To further understand the oscillatory behavior time plots are considered. Finally, a possible use for the observed properties is discussed as well and current approaches in research for the use of internal resonances are pointed out.
Consultation patterns before and after embedding pediatric palliative care into a pediatric hematology/oncology clinic
Authors: Greenmyer Jacob R. , Ngo Tiffany , Smith Melissa , Collura Christopher , Schiltz Brenda , McCarthy Sarah R. 
Published: September 2023

AbstractIntroductionPalliative care is a critical component of pediatric oncology care. Embedded pediatric palliative care (PPC) is relatively new in pediatric hematology/oncology (PHO) and may improve access, utilization, and quality of PPC. In June 2020, the Mayo Clinic PPC service transitioned from an afternoon, physically independent clinic to an all‐day clinic embedded within PHO.MethodsRetrospective chart review was used to quantify consultation rates from PHO to PPC in 12‐month study periods before and after establishment of an embedded clinic. Changes in descriptive statistics and consult patterns were calculated. Study periods were compared using either chi‐square or Fisher's exact tests for categorical variables and Wilcox rank sum tests for continuous variables.ResultsThere was an 89% increase in consultations from PHO to PPC after initiation of an embedded clinic (n = 20 vs. n = 38 per 12 months). The absolute number of completed outpatient consults increased from three (15% of visits) pre‐embedment to fourteen (37%) post‐embedment (p = .082). The median number of days from first oncology visit to PPC assessment was unchanged after embedment (36 vs. 47 days, p = .98). Consults for solid tumors increased from 22% (n = 4) pre‐embedment to 60% (n = 18) post‐embedment (p < .05). Consults for symptom management increased from 60% (n = 12) to 87% (n = 33) (p < .05).ConclusionsEmbedment of PPC into a PHO workspace was associated with an increased number of total consults, outpatient consults, solid tumor consults, and consults for symptom management. Our “partial‐PPO” model allowed for provision of PPC in the outpatient oncology setting in a clinic where there is not enough volume to support a full‐time oncology‐focused clinician team.
A multi‐level approach reveals key physiological and molecular traits in the response of two rice genotypes subjected to water deficit at the reproductive stage
Authors: Favreau Bénédicte , Gaal Camille , Pereira de Lima Isabela , Droc Gaétan , Roques Sandrine , Sotillo Armel , Guérard Florence , Cantonny Valérie , Gakière Bertrand , Leclercq Julie , Lafarge Tanguy , de Raissac Marcel 
Published: September 2023

AbstractRice is more vulnerable to drought than maize, wheat, and sorghum because its water requirements remain high throughout the rice life cycle. The effects of drought vary depending on the timing, intensity, and duration of the events, as well as on the rice genotype and developmental stage. It can affect all levels of organization, from genes to the cells, tissues, and/or organs. In this study, a moderate water deficit was applied to two contrasting rice genotypes, IAC 25 and CIRAD 409, during their reproductive stage. Multi‐level transcriptomic, metabolomic, physiological, and morphological analyses were performed to investigate the complex traits involved in their response to drought. Weighted gene network correlation analysis was used to identify the specific molecular mechanisms regulated by each genotype, and the correlations between gene networks and phenotypic traits. A holistic analysis of all the data provided a deeper understanding of the specific mechanisms regulated by each genotype, and enabled the identification of gene markers. Under non‐limiting water conditions, CIRAD 409 had a denser shoot, but shoot growth was slower despite better photosynthetic performance. Under water deficit, CIRAD 409 was weakly affected regardless of the plant level analyzed. In contrast, IAC 25 had reduced growth and reproductive development. It regulated transcriptomic and metabolic activities at a high level, and activated a complex gene regulatory network involved in growth‐limiting processes. By comparing two contrasting genotypes, the present study identified the regulation of some fundamental processes and gene markers, that drive rice development, and influence its response to water deficit, in particular, the importance of the biosynthetic and regulatory pathways for cell wall metabolism. These key processes determine the biological and mechanical properties of the cell wall and thus influence plant development, organ expansion, and turgor maintenance under water deficit. Our results also question the genericity of the antagonism between morphogenesis and organogenesis observed in the two genotypes.
Magneto‐responsive polydimethylsiloxane films with magnetic powder: Characterization and potential application in the tensile loading system
Authors: Guo Xiaoqi , Zou Yuanwen , Huang Zhongbing , Li Xiaohui 
Published: September 2023

AbstractMagnetic actuation has attracted a growing attention due to its non‐contact performance, rapid response and penetrability. The realization of magnetic actuation requires the participation of magneto‐responsive materials (MRMS), and magneto‐responsive polymers (MRPs) are one of the most widely used MRMs. Here, we report the fabrication, characterization and actuation tests of neodymium‐iron‐boron‐polydimethylsiloxane (NdFeB‐PDMS) magnetic films. The NdFeB‐PDMS magnetic film has great flexibility and elasticity, as well as excellent magnetism. The film also shows exceptional deformation and magnetic controllability under magnetic actuation. Besides, it can be driven under a very low magnetic field down to 1mT, and generate an out‐of‐plane displacement of 2.7 mm under the action of magnetic fields. We focus on the tensile deformation of NdFeB‐PDMS films under magnetic driving and provide a possible design for their potential application in the tensile loading system. Preliminary tests demonstrate that the size of tensile deformation is adjusted by controlling the output signal and amplification factor.Highlights
Fabrication of NdFeB‐PDMS magnetic films.
Mechanical and magnetic characterizations of NdFeB‐PDMS films.
Magnetic actuation tests of NdFeB‐PDMS films.
Magnetic field‐induced tensile deformation of NdFeB‐PDMS films.
Potential application of NdFeB‐PDMS films in the tensile loading system.
Effect of carbon black type and concentration on the performance of semiconductive shielding material of high‐voltage cable
Authors: Liu Tianyao , Guo Hao , Li Xuejing , Liu Lu , Li Guochang , Wei Yanhui , Hao Chuncheng , Zhu Yuanwei 
Published: September 2023

AbstractSemiconductive shielding layer as an important part of high‐voltage cable, its performance directly affects the safe operation and the service life of the cable. Carbon black (CB) is the main conductive filler of shielding materials, and its type and concentration directly affect the performance of the shielding layer. In this paper, CB‐A with higher structure and CB‐B with lower structure were used as conductive fillers and EBA was chosen as the matrix resin to prepare the shielding materials. The CB concentrations of the shielding materials were 35, 45, and 55 phr. The influences of CB type and concentration on the physicochemical, electrical, thermal and mechanical properties of the shielding materials were investigated. The research shows that when the CB types are the same, the higher the concentration of CB, the more intensive the CB network in the shielding material, and the more serious the CB agglomeration phenomenon. With increasing CB concentration, shielding materials show a decreasing trend of volume resistivity, an increasing trend of thermal conductivity, and a decreasing trend of mechanical properties. When the CB concentration is the equal, the CB‐A has better dispersion in the matrix resin, CB‐A/EBA shielding material has lower volume resistivity and weaker PTC effect, CB‐A/EBA shielding material has higher thermal conductivity at low temperature and CB‐B/EBA shielding material has higher thermal conductivity at high temperature, CB‐A/EBA shielding material has better mechanical properties. A comprehensive comparison shows that CB‐A/EBA shielding material with a concentration of 45 phr has excellent overall performance, with volume resistivity of 15.3 and 68 Ω·cm at 25°C and 90°C, respectively. The thermal conductivity is 0.434 W/(m K) at room temperature and 0.536 W/(m K) at 90°C. The stress is 31.08 MPa and the strain is 570.2%. This work has important reference for the selection of conductive fillers and performance improvement of semiconductive shielding materials.
Toward a better interpretation of the partial least squares regression models for fluoropolymers treated by dielectric barrier discharges at atmospheric pressure
Authors: Gélinas Alex , Profili Jacopo , Fotouhiardakani Faegheh , Caceres Ferreira Williams Marcel , Laurent Morgane , Ravichandran Sethumadhavan , Laroche Gaétan 
Published: September 2023

AbstractIn this article, partial least squares regression was applied to a continuous dielectric discharge process aiming to modify the surface of a fluoropolymer. Cross‐validation was used to find the optimal number of latent variables that minimize the error from the model. Then, the key parameters affecting the process were highlighted with the variable importance on the projection (VIP) and the biplot exploratory graph produced from the algorithm. Finally, the model was used to predict additional data not included in the training set. The new predictions were used to assess the ability of the model to predict data outside of the training range. The applicability domain for this model was also discussed. The results showed that less prediction errors occurred when the surface modification remained close to the untreated fluoropolymer surface characteristics.
Effect of self‐bias voltage on the nanoscale morphological properties of corn starch‐based films modified by hexamethyldisiloxane plasma
Authors: da Fonseca de Albuquerque Marta D. , Bastos Daniele C. , Matos Robert S. , Pires Marcelo A. , Ferreira Nilson S. , Ramos Glenda Q. , da Fonseca Filho Henrique D. , Simao Renata A. 
Published: September 2023

AbstractThermoplastic starch (TPS) films underwent casting and plasma coating with Hexamethyldisiloxane (HMDSO) gas at various self‐bias voltages. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) imaging revealed slight swelling and grain structures in untreated TPS films due to starch dissolution. However, the HMDSO plasma treatment had minimal impact, with swollen grains still present beneath a layer of small granules. Contact angle measurements demonstrated that untreated films had an initial water contact angle of 32°, gradually decreasing over time. Conversely, HMDSO‐coated films exhibited stable hydrophobic behavior, with contact angles exceeding 100°. Statistical analysis confirmed TPS films’ lower average roughness, while modified films showed no significant difference in height parameters. Higher self‐bias voltages correlated with larger grain sizes. Notably, experimental treatments decreased long‐range spatial correlations, as indicated by Hurst's exponent.
Domain swap facilitates structural transitions of spider silk protein C‐terminal domains
Authors: Rat Charlotte , Heindl Cedric , Neuweiler Hannes 
Published: September 2023

AbstractDomain swap is a mechanism of protein dimerization where the two interacting domains exchange parts of their structure. Web spiders make use of the process in the connection of C‐terminal domains (CTDs) of spidroins, the soluble protein building blocks that form tough silk fibers. Besides providing connectivity and solubility, spidroin CTDs are responsible for inducing structural transitions during passage through an acidified assembly zone within spinning ducts. The underlying molecular mechanisms are elusive. Here, we studied the folding of five homologous spidroin CTDs from different spider species or glands. Four of these are domain‐swapped dimers formed by five‐helix bundles from spidroins of major and minor ampullate glands. The fifth is a dimer that lacks domain swap, formed by four‐helix bundles from a spidroin of a flagelliform gland. Spidroins from this gland do not undergo structural transitions whereas the others do. We found a three‐state mechanism of folding and dimerization that was conserved across homologues. In chemical denaturation experiments the native CTD dimer unfolded to a dimeric, partially structured intermediate, followed by full unfolding to denatured monomers. The energetics of the individual folding steps varied between homologues. Contrary to the common belief that domain swap stabilizes protein assemblies, the non‐swapped homologue was most stable and folded four orders of magnitude faster than a swapped variant. Domain swap of spidroin CTDs induces an entropic penalty to the folding of peripheral helices, thus unfastening them for acid‐induced unfolding within a spinning duct, which primes them for refolding into alternative structures during silk formation.
Design of the second‐order robust exact differentiator: A describing function approach
Authors: Pérez‐Ventura Ulises , Escobar Jonathan , Fridman Leonid , Iriarte Rafael 
Published: September 2023

AbstractThe paper proposes a design methodology for the second‐order robust exact differentiator in the presence of small time‐delays characterizing the time of signal processing. With this aim, the describing function is used to provide several sets of the gains ensuring high accuracy in the reconstruction of the first‐order derivative of smooth signals, that is, minimizing the main harmonic of chattering. The proposal fulfills the Loeb's criterion: if self‐excited oscillations appear in the trajectories of the delayed differentiator, they are orbital and asymptotically stable. Besides the global finite‐time stability of the error is proved for the non‐delayed differentiator under such gains settings by using a homogeneous Lyapunov function. Numerical examples are provided to illustrate the results.
Suppressed Ion Migration in FA‐Rich Perovskite Photovoltaics through Enhanced Nucleation of Encapsulation Interface
Authors: Li Jianlin , Xing Zhi , Li Dengxue , Wang Yajun , Hu Xiaotian , Hu Ting , Chen Yiwang 
Published: September 2023

AbstractWith excellent homogeneity, compactness and controllable thickness, atomic layer deposition (ALD) technology is widely used in perovskite solar cells (PSCs). However, residual organic sources and undesired reactions pose serious challenges to device performance as well as stability. Here, ester groups of poly(ethylene‐co‐vinyl acetate) are introduced as a reaction medium to promote the nucleation and complete conversion of tetrakis(dimethylamino)tin(IV) (TDMA‐Sn). Through simulations and experiments, it is verified that ester groups as Lewis bases can coordinate with TDMA‐Sn to facilitate homogeneous deposition of ALD‐SnOx, which acts as self‐encapsulated interface with blocking properties against external moisture as well as internal ion migration. Meanwhile, a comprehensive evaluation of the self‐encapsulated interface reveals that the energy level alignment is optimized to improve the carrier transport. Finally, the self‐encapsulated device obtains a champion photovoltaic conversion efficiency (PCE) of 22.06% and retains 85% of the initial PCE after being stored at 85 °C with relative humidity of 85% for more than 800 h.
PEO‐Based Solid Composite Polymer Electrolyte for High Capacity Retention All‐Solid‐State Lithium Metal Battery
Authors: Khan Kashif , Hanif Muhammad Bilal , Xin Hu , Hussain Arshad , Ali Hina Ghulam , Fu Bowen , Fang Zixuan , Motola Martin , Xu Ziqiang , Wu Mengqiang 
Published: September 2023

AbstractThe limited ionic conductivity at room temperature and the constrained electrochemical window of poly(ethylene oxide) (PEO) pose significant obstacles that hinder its broader utilization in high‐energy‐density lithium metal batteries. The garnet‐type material Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is recognized as a highly promising active filler for enhancing the performance of PEO‐based solid polymer electrolytes (SPEs). However, its performance is still limited by its high interfacial resistance. In this study, a novel hybrid filler‐designed SPE is employed to achieve excellent electrochemical performance for both the lithium metal anode and the LiFePO4 cathode. The solid composite membrane containing hybrid fillers achieves a maximum ionic conductivity of 1.9 × 10−4 S cm−1 and a Li+ transference number of 0.67 at 40 °C, respectively. Additionally, the Li/Li symmetric cells demonstrate a smooth and stable process for 2000 h at a current density of 0.1 mA cm−2. Furthermore, the LiFePO4/Li battery delivers a high‐rate capacity of 159.2 mAh g−1 at 1 C, along with a capacity retention of 95.2% after 400 cycles. These results validate that employing a composite of both active and inactive fillers is an effective strategy for achieving superior performance in all‐solid‐state lithium metal batteries (ASSLMBs).
Robust Micro‐Sized and Defect‐Rich Carbon–Carbon Composites as Advanced Anodes for Potassium‐Ion Batteries
Authors: Quan Zhuohua , Wang Fei , Wang Yuchen , Liu Zhendong , Zhang Chengzhi , Qi Fulai , Zhang Mingchang , Ye Chong , Tan Jun , Liu Jinshui 
Published: September 2023

AbstractPitch‐derived carbon (PC) anode features the merits of low‐cost, rich edge‐defect sites, and tunable crystallization degree for potassium ion batteries (PIBs). However, gaining the PC anode with both rich edge‐defect sites and robust structure remains challenging. Herein, micro‐sized and robust PC/expanded‐graphite (EG) composites (EGC) with rich edge‐defect sites are massively synthesized via melting impregnation and confined pyrolysis. The PC is in situ encapsulated in micro‐sized EG skeleton with robust chemical bonds between PC and EG after thermal treatment, endowing the structural stability as micro‐sized carbon–carbon composites. The confinement effect originating from EG skeleton could suppress the crystallization degree of the PC and contribute rich edge‐defect sites in EGC composites. Additionally, the EG skeleton inside EGC could form continuous electronic conduction nets and establish low‐tortuosity carbonaceous electrodes, facilitating rapid electron/ion migration. While applied in PIBs, the EGC anode delivers a reversible capacity that up to 338.5 mAh g‒1 at 0.1 A g‒1, superior rate performance of 127.5 mAh g‒1 at 5.0 A g‒1, and long‐term stability with 204.8 mAh g‒1 retain after 700 cycles at 1.0 A g‒1. This novel strategy highlights an interesting category of heterogeneous carbon–carbon composite materials to keep pace with the demand for the future PIBs industry.
Rechargeable Zinc–Air Batteries: Advances, Challenges, and Prospects
Authors: Lv Xian‐Wei , Wang Zhongli , Lai Zhuangzhuang , Liu Yuping , Ma Tianyi , Geng Jianxin , Yuan Zhong‐Yong 
Published: September 2023

AbstractRechargeable zinc–air batteries (Re‐ZABs) are one of the most promising next‐generation batteries that can hold more energy while being cost‐effective and safer than existing devices. Nevertheless, zinc dendrites, non‐portability, and limited charge–discharge cycles have long been obstacles to the commercialization of Re‐ZABs. Over the past 30 years, milestone breakthroughs have been made in technical indicators (safety, high energy density, and long battery life), battery components (air cathode, zinc anode, and gas diffusion layer), and battery configurations (flexibility and portability), however, a comprehensive review on advanced design strategies for Re‐ZABs system from multiple angles is still lacking. This review underscores the progress and strategies proposed so far to pursuit the high‐efficiency Re‐ZABs system, including the aspects of rechargeability (from primary to rechargeable), air cathode (from unifunctional to bifunctional), zinc anode (from dendritic to stable), electrolytes (from aqueous to non‐aqueous), battery configurations (from non‐portable to portable), and industrialization progress (from laboratorial to practical). Critical appraisals of the advanced modification approaches (such as surface/interface modulation, nanoconfinement catalysis, defect electrochemistry, synergistic electrocatalysis, etc.) are highlighted for cost‐effective flexible Re‐ZABs with good sustainability and high energy density. Finally, insights are further rendered properly for the future research directions of advanced zinc–air batteries.