bluuebunny/crossref_metadata_2025_split huggingface dataset:
Memristors Based on (Zr, Hf, Nb, Ta, Mo, W) High‐Entropy Oxides
Authors: Ahn Minhyung , Park Yongmo , Lee Seung Hwan , Chae Sieun , Lee Jihang , Heron John T. , Kioupakis Emmanouil , Lu Wei D. , Phillips Jamie D. 
Published: April 2021

AbstractMemristors have emerged as transformative devices to enable neuromorphic and in‐memory computing, where success requires the identification and development of materials that can overcome challenges in retention and device variability. Here, high‐entropy oxide composed of Zr, Hf, Nb, Ta, Mo, and W oxides is first demonstrated as a switching material for valence change memory. This multielement oxide material provides uniform distribution and higher concentration of oxygen vacancies, limiting the stochastic behavior in resistive switching. (Zr, Hf, Nb, Ta, Mo, W) high‐entropy‐oxide‐based memristors manifest the “cocktail effect,” exhibiting comparable retention with HfO2‐ or Ta2O5‐based memristors while also demonstrating the gradual conductance modulation observed in WO3‐based memristors. The electrical characterization of these high‐entropy‐oxide‐based memristors demonstrates forming‐free operation, low device and cycle variability, gradual conductance modulation, 6‐bit operation, and long retention which are promising for neuromorphic applications.
Hybridization of Emerging Crystalline Porous Materials: Synthesis Dimensionality and Electrochemical Energy Storage Application
Authors: Zhang Huanhuan , Gu Cheng , Yao Ming‐Shui , Kitagawa Susumu 
Published: April 2021

AbstractMetal–organic frameworks (MOFs) and covalent organic frameworks (COFs) are important members of crystalline porous materials due to their huge structural diversity and tunability. By hybridizing MOFs or COFs with other materials, restrictions of the pristine materials, i.e., poor conductivity and weak mechanical property, can be effectively circumvented. This review summarizes several hybridization techniques from the molecular level to the micro‐ and macroscales for the preparation of various MOF and COF hybrids. Then, their representative applications as electrochemical energy storage devices are elaborated, such as rechargeable batteries, supercapacitors, polymer electrolytes, and separators. The basic principles and mechanisms for guiding hybridization are also properly clarified.
Community‐level social capital and agricultural cooperatives: Evidence from Hebei, China
Authors: Jia Susan (Sixue) , Xu Xiaobing 
Published: April 2021

AbstractThis paper explores the relationships between five aspects of community‐level social capital and the formation and performance of agricultural cooperatives, based on an investigation of 50 rural villages in Hebei, China. Results show that trust and informal sociability relate positively to either cooperative formation or performance, whereas local network is negatively related to both formation and performance. It is therefore recommended that policy makers leverage publicity channels and financial tools to encourage and stimulate trust, enhance the effectiveness of intervillage communication, and work out a collaborative mechanism between local networks and agricultural cooperatives. [EconLit Citations: Q13, P32]
Testing an invasion mechanism for Eucalyptus globulus: Is there evidence of allelopathy?
Authors: Nelson Kristen M. , Bisbing Sarah , Grossenbacher Dena L. , Ritter Matt , Yost Jennifer M. 
Published: April 2021

PREMISESparse understory communities, in association with non‐native tree species, are often attributed to allelopathy, the chemical inhibition of a plant by another. However, allelopathy is a difficult ecological phenomenon to demonstrate as many studies show conflicting results. Eucalyptus globulus, a tree native to Australia, is one of the most widely planted trees around the world. Sparse understories are common beneath E. globulus plantations and are often attributed to allelopathy, but the ecological impacts of E. globulus on native plant communities outside Austrialia are poorly understood.METHODSTo assess allelopathy as a mechanism of understory inhibition, we tested volatile‐ and water‐soluble leaf extracts from E. globulus, Salvia apiana, and Quercus agrifolia on seed germination of California native plants. We also quantified germination rates and early seedling growth of California native plants grown in soil from E. globulus plantations versus soil from an adjacent native plant community.RESULTSVolatile compounds from E. globulus did not significantly reduce germination for any species. Inhibition from water‐soluble E. globulus compounds was comparable to that of a native tree, Quercus agrifolia (10%). Eucalyptus globulus soil supported germination and early seedling growth of native species equal to or better than coastal scrub soil, although species responses were variable.CONCLUSIONSIn contrast to previous studies, our results fail to support the hypothesis that E. globulus chemically inhibits germination of native species. California native plants germinate and grow well in soils from E. globulus plantations, which may have significant implications for management and restoration of land historically occupied by E. globulus plantations.
A deep‐learning‐based workflow to assess taxonomic affinity of hominid teeth with a test on discriminating Pongo and Homo upper molars
Authors: Yi Zhixing , Zanolli Clément , Liao Wei , Wang Wei 
Published: April 2021

AbstractObjectivesConvolutional neural network (CNN) is a state‐of‐art deep learning (DL) method with superior performance in image classification. Here, a CNN‐based workflow is proposed to discriminate hominid teeth. Our hope is that this method could help confirm otherwise questionable records of Homo from Pleistocene deposits where there is a standing risk of mis‐attributing molars of Pongo to Homo.Methods and materialsA two‐step workflow was designed. The first step is converting the enamel–dentine junction (EDJ) into EDJ card, that is, a two‐dimensional image conversion of the three‐dimensional EDJ surface. In this step, researchers must carefully orient the teeth according to the cervical plane. The second step is training the CNN learner with labeled EDJ cards. A sample consisting of 53 fossil Pongo and 53 Homo (modern human and Neanderthal) was adopted to generate EDJ cards, which were then separated into training set (n = 84) and validation set (n = 22). To assess the feasibility of this workflow, a Pongo‐Homo classifier was trained from the aforementioned EDJ card set, and then the classifier was used to predict the taxonomic affinities of six samples (test set) from von Koenigswald's Chinese Apothecary collection.ResultsResults show that EDJ cards in validation set are classified accurately by the CNN learner. More importantly, taxonomic predictions for six specimens in test set match well with the diagnosis results deduced from multiple lines of evidence, implying the great potential of CNN method.DiscussionThis workflow paves a way for future studies using CNN to address taxonomic complexity (e.g., distinguishing Pongo and Homo teeth from the Pleistocene of Asia). Further improvements include visual interpretation and extending the applicability to moderately worn teeth.
Lower complexity and higher variability in beat‐to‐beat systolic blood pressure are associated with elevated long‐term risk of dementia: The Rotterdam Study
Authors: Ma Yuan , Zhou Junhong , Kavousi Maryam , Lipsitz Lewis A. , Mattace‐Raso Francesco , Westerhof Berend E. , Wolters Frank J. , Wu Julia W. , Manor Brad , Ikram M. Kamran , Goudsmit Jaap , Hofman Albert , Ikram M. Arfan 
Published: April 2021

AbstractIntroductionWe hypothesized that subclinical disruption in blood pressure (BP) dynamics, captured by lower complexity and higher variability, may contribute to dementia risk, above and beyond BP levels.MethodsThis prospective cohort study followed 1835 older adults from 1997 to 2016, with BP complexity quantified by sample entropy and BP variability quantified by coefficient of variation using beat‐to‐beat BP measured at baseline.ResultsThree hundred thirty‐four participants developed dementia over 20 years. Reduced systolic BP (SBP) complexity was associated with a higher risk of dementia (hazard ratio [HR] comparing extreme quintiles: 1.55; 95% confidence interval [CI]: 1.09‐2.20). Higher SBP variability was also associated with a higher risk of dementia (HR comparing extreme quintiles: 1.57; 95% CI: 1.11‐2.22. These findings were observed after adjusting for age, sex, apolipoprotein E (APOE) genotype, mean SBP, and other confounding factors.DiscussionsOur findings suggest that lower complexity and higher variability of beat‐to‐beat SBP are potential novel risk factors or biomarkers for dementia.
Measures of resting state EEG rhythms for clinical trials in Alzheimer's disease: Recommendations of an expert panel
Authors: Babiloni Claudio , Arakaki Xianghong , Azami Hamed , Bennys Karim , Blinowska Katarzyna , Bonanni Laura , Bujan Ana , Carrillo Maria C. , Cichocki Andrzej , de Frutos‐Lucas Jaisalmer , Del Percio Claudio , Dubois Bruno , Edelmayer Rebecca , Egan Gary , Epelbaum Stephane , Escudero Javier , Evans Alan , Farina Francesca , Fargo Keith , Fernández Alberto , Ferri Raffaele , Frisoni Giovanni , Hampel Harald , Harrington Michael G. , Jelic Vesna , Jeong Jaeseung , Jiang Yang , Kaminski Maciej , Kavcic Voyko , Kilborn Kerry , Kumar Sanjeev , Lam Alice , Lim Lew , Lizio Roberta , Lopez David , Lopez Susanna , Lucey Brendan , Maestú Fernando , McGeown William J. , McKeith Ian , Moretti Davide Vito , Nobili Flavio , Noce Giuseppe , Olichney John , Onofrj Marco , Osorio Ricardo , Parra‐Rodriguez Mario , Rajji Tarek , Ritter Petra , Soricelli Andrea , Stocchi Fabrizio , Tarnanas Ioannis , Taylor John Paul , Teipel Stefan , Tucci Federico , Valdes‐Sosa Mitchell , Valdes‐Sosa Pedro , Weiergräber Marco , Yener Gorsev , Guntekin Bahar 
Published: April 2021

AbstractThe Electrophysiology Professional Interest Area (EPIA) and Global Brain Consortium endorsed recommendations on candidate electroencephalography (EEG) measures for Alzheimer's disease (AD) clinical trials. The Panel reviewed the field literature. As most consistent findings, AD patients with mild cognitive impairment and dementia showed abnormalities in peak frequency, power, and “interrelatedness” at posterior alpha (8‐12 Hz) and widespread delta (< 4 Hz) and theta (4‐8 Hz) rhythms in relation to disease progression and interventions. The following consensus statements were subscribed: (1) Standardization of instructions to patients, resting state EEG (rsEEG) recording methods, and selection of artifact‐free rsEEG periods are needed; (2) power density and “interrelatedness” rsEEG measures (e.g., directed transfer function, phase lag index, linear lagged connectivity, etc.) at delta, theta, and alpha frequency bands may be use for stratification of AD patients and monitoring of disease progression and intervention; and (3) international multisectoral initiatives are mandatory for regulatory purposes.
Elevated plasma neurofilament light predicts a faster rate of cognitive decline over 5 years in participants with objectively‐defined subtle cognitive decline and MCI
Authors: Bangen Katherine J. , Thomas Kelsey R. , Weigand Alexandra J. , Edmonds Emily C. , Clark Alexandra L. , Solders Seraphina , Delano‐Wood Lisa , Galasko Douglas R. , Bondi Mark W. ,   for the Alzheimer's Disease Neuroimaging Initiative
Published: April 2021

AbstractIntroductionNeurofilament light (NFL) reflects neuroaxonal damage and is implicated in mild cognitive impairment (MCI) and Alzheimer's disease (AD). Little is known about NFL in pre‐MCI stages, such as in individuals with objectively‐defined subtle cognitive decline (Obj‐SCD).MethodsTwo hundred ninety‐four participants from the Alzheimer's Disease Neuroimaging Initiative (ADNI) underwent baseline blood draw and serial neuropsychological testing over 5 years of follow‐up.ResultsIndividuals with Obj‐SCD and MCI showed elevated baseline plasma NFL relative to the cognitively normal (CN) group. Across the sample, elevated NFL predicted faster rate of cognitive and functional decline. Within the Obj‐SCD and MCI groups, higher NFL levels predicted faster rate of decline in memory and preclinical AD composite score compared to the CN group.DiscussionFindings demonstrate the utility of plasma NFL as a biomarker of early AD‐related changes, and provide support for the use of Obj‐SCD criteria in clinical research to better capture subtle cognitive changes.
Molecular imaging of NAD+‐dependent deacetylase SIRT1 in the brain
Authors: Xu Yulong , Chen Zude , Wey Hsiao‐Ying , Liang Yingxia , Tanzi Rudolph E. , Zhang Can , Wang Changning 
Published: April 2021

AbstractIntroductionAging is an inevitable physiological process and the biggest risk factor of Alzheimer's disease (AD). Developing an imaging tracer to visualize aging‐related changes in the brain may provide a useful biomarker in elucidating neuroanatomical mechanisms of AD.MethodsWe developed and characterized a new tracer that can be used to visualize SIRT1 in brains related to aging and AD by positron emission tomography imaging.ResultsThe SIRT1 tracer displayed desirable brain uptake and selectivity, as well as stable metabolism and proper kinetics and distribution in rodent and nonhuman primate brains. This new tracer was further validated by visualizing SIRT1 in brains of AD transgenic mice, compared to nontransgenic animals.DiscussionOur SIRT1 tracer not only enables, for the first time, the demonstration of SIRT1 in animal brains, but also allows visualization and recapitulation of AD‐related SIRT1 neuropathological changes in animal brains.
Single‐Handed Double Helix and Spiral Platelet Formed by Racemate of Dissymmetric Cages
Authors: Liu Xiaoning , Shi Zheng , Xie Mingchen , Xu Jianping , Zhou Zhifan , Jung Sinyeong , Cui Guijia , Zuo Yong , Li Tao , Yu Chunyang , Liu Zhiqiang , Zhang Shaodong 
Published: April 2021

AbstractSpontaneous deracemization has been used to separate homochiral domains from the racemic system. However, homochirality can only be referred to when the scales of these domains and systems are specified. To clarify this, we report self‐assembly of racemates of dissymmetric cages DC‐1 with a cone‐shape propeller geometry, forming a centrosymmetric columnar crystalline phase (racemic at crystallographic level). Owing to their anisotropic geometry, the two enantiomers are packed in a frustrated fashion in this crystalline phase; single‐handed double helices are observed (single‐handedness at supramolecular level). The frustrated packing (layer continuity break‐up) in turn facilitates screw dislocation during the crystal growth, forming left‐ or right‐handed spiral platelets (symmetry‐breaking at morphological level), although each platelet is composed of DC‐1 racemates. The symmetry correlation between DC‐1 molecules, the crystalline phase and spiral platelets, all exhibit C3 symmetry.
Dependence of intrinsic viscosity and molecular size on molecular weight of partially hydrolyzed polyacrylamide
Authors: Zhang Hao , Feng Yujun 
Published: April 2021

AbstractAs a typical water‐soluble polymer, ultra‐high molecular weight (UHMW) partially hydrolyzed polyacrylamide (HPAM) has been widely used in various industries as thickeners or rheology modifiers. However, precise determination of its critical physical parameters such as molecular weight, radius of gyration (Rg) and hydrodynamic radius (Rh) were less documented due to their high viscosity in aqueous solution. In this work, the molecular structure of five UHMW‐HPAM samples with different MW was elucidated by 1H and 13C NMR spectroscopy, and their solution properties were characterized by both static and dynamic light scattering. It is found that all the second virial coefficient (A2) values are positive and approaching zero, indicating of a good solvent of 0.5 M NaCl for UHMW‐HPAM. The weight‐average molecular weight (Mw) dependence of molecular size and intrinsic viscosity [η] for these series of HPAM polymers with MW ranging from 4.81 to 15.4 × 106 g·mol−1 can be correlated as Rg = 3.52 × 10−2Mw0.51, Rh = 1.97 × 10−2Mw0.51, and [η] = 6.98 × 10−4 Mw0.91, respectively. These results are helpful in understanding the relationship between molecular weight and coil size of HPAM polymers in solution, and offer references for quick estimation of molecular weight and screening of commercial UHMW‐HPAM polymers for specific end‐users.
On global stability of planar systems with state‐dependent Riccati equation control
Authors: Liu Chien‐Chun , Liao Teh‐Lu , Chen Chih‐Chiang 
Published: April 2021

AbstractThis paper is concerned with the global asymptotic stability (GAS) of a class of planar systems with a state‐dependent Riccati equation (SDRE) control. Based on the philosophy of feedback domination along with the depiction of the influence arising from system nonlinearities, a sufficient condition indicating the allowable intervals of control gains is established by which the GAS of the system with SDRE control can be guaranteed successfully. The presented condition is delicately equipped with a tunable parameter skillfully enhancing the feasibility while providing a new insight and perspective in ensuring global stability of the SDRE control. A numerical example is provided to verify the effectiveness of the proposed result.
Distributed Nash equilibrium seeking of aggregative games under networked attacks
Authors: Shao Guangru , Wang Xue‐Fang , Wang Rui 
Published: April 2021

AbstractThis paper investigates the distributed Nash equilibrium seeking problem of aggregative games in the presence of networked attacks. A switched algorithm with the fast estimate dynamics is proposed to explore the effect of attacks on seeking a Nash equilibrium. To guarantee the convergence of this algorithm, such a switched strategy is modeled as a hybrid system by using the hybrid automaton and time‐ratio conditions. Then, by constructing an appropriate Lyapunov function, we can prove that the hybrid dynamical system is exponentially stable and the Nash equilibrium can be achieved exponentially though the communication network is affected by attacks. Finally, a Nash–Cournot game is provided to verify the main results.
Switching DCAFs: Beyond substrate receptors
Authors: Jang Sang‐Min , Redon Christophe E. , Aladjem Mirit I. 
Published: April 2021

AbstractDeciphering how DCAFs (DDB1‐CUL4 Associated Factors) modulate a broad spectrum of cellular processes, including cell cycle progression and maintenance of genomic integrity is critical to better understand cellular homeostasis and diseases. Cells contain more than 100 DCAFs that associate with the Cullin‐Ring Ubiquitin Ligase 4 (CRL4) complex that target specific protein substrates for degradation. DCAFs are thought to act as substrate receptors that dictate the specificity of the ubiquitination machinery (“catalytic DCAFs”). However, recent studies have suggested that some DCAFs might play a different role by targeting CRL4 complexes to distinct cellular compartments (“structural DCAFs”). Once localized to their correct cellular domains, these CRLs dissociate from the structural DCAFs prior to their association with other, substrate‐specific catalytic DCAFs. Thus, we propose that DCAF switches can provide a mechanistic basis for the degradation of proteins that regulate cell growth and proliferation at precise points in space and time.
Sustaining brand loyalty: The moderating role of green consumption values
Authors: Rizomyliotis Ioannis , Poulis Athanasios , Konstantoulaki Kleopatra , Giovanis Apostolos 
Published: April 2021

AbstractEnvironmental issues are massively emerging in the current agendas of governments, businesses and consumers all over the globe. Consumers increasingly adopt a more energetic role in the environmental discussion and employ product consumption to manifest their contribution to the debate. Equally, a growing number of businesses try to affect positive social change, whereas others strategically approach green opportunities; at the same time, they persistently intensify their branding offerings to sustain loyalty. This article brings into discussion green consumption values as the authors aim to shed light into the way the latter moderate the effect of brand related factors, namely, brand experiences and brand personality, on brand loyalty. Based on data received from 413 participants and using the wearable technologies industry as the focal context, the study underscores the significance of green consumption values. Findings are discussed, and implications for managers are provided.
Comparison of Phytochemical Profile and Bioproperties of Methanolic Extracts from Different Parts of Tunisian Rumex roseus
Authors: Chelly Meryam , Chelly Sabrine , Occhiuto Cristina , Cimino Francesco , Cristani Mariateresa , Saija Antonina , Muscarà Claudia , Ruberto Giuseppe , Speciale Antonio , Bouaziz‐Ketata Hanen , Siracusa Laura 
Published: April 2021

AbstractThe genus Rumex (Polygonaceae) is distributed worldwide and the different species belonging to it are used in traditional medicine. The present study aimed at the evaluation of the phytochemical profile and the biochemical properties of methanolic extracts from different parts (roots, stems, and leaves) of Rumex roseus, a wild local Tunisian plant traditionally used as food. The phytochemical analysis on the extracts was performed using standard colorimetric procedures, HPLC‐DAD, and HPLC‐DAD‐ESI‐MS; then, several in vitro cell‐free assays have been used to estimate their antioxidant/free radical scavenging capability (TAC‐PM, DPPH, TEAC, FRAP, ORAC, SOD‐like activity, and HOCl‐induced albumin degradation). Additionally, anti‐inflammatory effect of these extracts was evaluated in an in vitro model of acute intestinal inflammation in differentiated Caco‐2 cells. The results showed that the methanolic extracts from stems and, especially, leaves contain substantial amounts of flavones (apigenin and luteolin, together with their derivatives), while the extract from roots is characterized by the presence of tannins and quinic acid derivatives. All the extracts appeared endowed with excellent antioxidant/free radical scavenging properties. In particular, the extract from roots was characterized by a remarkable activity, probably due to its different and peculiar polyphenolic composition. Furthermore, both Rumex roseus roots and stems extracts demonstrated an anti‐inflammatory effect in intestinal epithelial cells, reducing TNF‐α‐induced gene expression of IL‐6 and IL‐8. In conclusion, R. roseus methanolic extracts have shown to be potential sources of bioactive compounds to be used in the prevention and treatment of pathologies related to oxidative stress and inflammation.
Hydrophobic/Hydrophilic Interplay in 1,2,4‐Triazole‐ or Carboxylate‐Based Molybdenum(VI) Oxide Hybrids: A Step Toward Development of Reaction‐Induced Self‐Separating Catalysts
Authors: Lysenko Andrey B. , Senchyk Ganna A. , Domasevitch Kostiantyn V. , Neves Patrícia , Valente Anabela A. , Pillinger Martyn , Gonçalves Isabel S. 
Published: April 2021

Abstract2‐(4H‐1,2,4‐triazol‐4‐yl)acetic acid (trglyH) and (dl)‐4‐methyl‐2‐(4H‐1,2,4‐triazol‐4‐yl)pentanoic acid (trleuH) were used as ligands for the development of MoO3 coordination hybrids for catalytic applications. Coordination polymers [Mo2O6(Htrgly)] ⋅ H2O (1) and [MoO3(trleuH)] ⋅ 0.5H2O (2) were prepared and structurally characterized. Compound 1 adopts a structure in which edge‐sharing MoO6 octahedra are organized in a ribbon motif via μ3‐O bridges. The Htrgly ligand exists as a zwitterion: −CO2− links two MoVI in a μ2‐η1 : η1 mode, while positively charged triazolium is left uncoordinated. In 2, Mo atoms are joined in a chain through μ2‐O. The more hydrophobic trleuH appears in a nonionized form and its [N−N] sites serve as a “clamp” for supporting the [−OMo(O)2−OMo(O)2(tr)2]n sequence. The complexes were explored for liquid phase catalytic epoxidation of cis‐cyclooctene, using H2O2 or tert‐butylhydroperoxide as oxidants. The hybrids showed good catalytic activity, and 2 behaved as a reaction‐induced self‐separating catalyst for olefin epoxidation with H2O2, presenting advantages of homogeneous and heterogeneous catalysis.