bluuebunny/crossref_metadata_2025_split huggingface dataset:
Implicit meshless method to solve 2D fractional stochastic Tricomi‐type equation defined on irregular domain occurring in fractal transonic flow
Authors: Mirzaee Farshid , Samadyar Nasrin 
Published: October 2020

AbstractIn the current paper, we develop a new method based on the finite difference formulation and meshless method to solve 2D time fractional stochastic Tricomi‐type equation with Caputo derivative in temporal direction and Neumann boundary condition defined on irregular domain, numerically. In this method, first the fractional order derivative is discretized by a finite difference scheme and then meshless method based on radial basis functions is employed to approximate the functions in the spatial directions. So, the solution of considered problem is transformed to the solution of a linear system of algebraic equations which will be solved at each time step. The most advantage of this method is that it has no triangular, quadrangular, or other type of meshes and therefore is very applicable to solve various high dimensional problems. Finally, some test problems with different domains have been solved via present method to verify the accuracy and efficiency of the newly developed meshless formulation. Numerical results confirm the present technique is very effective to approximate the solution of 2D fractional stochastic Tricomi‐type equation with Neumann boundary condition.
Applicability of cellulosic‐based Polyalthia longigolia seed filler reinforced vinyl ester biocomposites on tribological performance
Authors: Nagaprasad Nagaraj , Stalin Balasubramaniam , Vignesh Venkataraman , Ravichandran Manickam , Rajini Nagarajan , Ismail Sikiru Oluwarotimi 
Published: October 2020

AbstractThe focus of this work was to analyze the effect of weight percentage (wt%) of Polyalthia longigolia seed filler (PLSF) on the wear responses (wear loss and coefficient of friction) of the vinyl ester (VE) matrix composites, using signal‐to‐noise (SN) ratio and analysis of variance (ANOVA) methods. The Polyalthia longigolia seed filler/vinyl ester (PLSF‐VE) composites were produced by compression molding (CM) technique. Scanning electron microscopy (SEM) analysis showed that the PLSF content was homogeneously distributed in the matrix. Pin on disc (POD) wear tester was employed to carry out the experiments. Both SN ratio and ANOVA were performed to determine the process parameters that exhibited lower wear responses. The wear of the composite was minimized by optimizing the four diverse process factors: load, P (N), sliding speed, N (rpm) and filler content (wt%), based on Taguchi's L9 orthogonal array. The process parameters at which minimum wear loss (WL) occurred were identified with 25 wt% sample at 10 N and 300 rpm. Also, the process parameters for minimum coefficient of friction (COF) were observed with 25 wt% sample at 5 N and 700 rpm. From the ANOVA results obtained, it was evident that P mostly influenced the WL and COF of the PLSF‐VE composites during POD wear testing. This kind of lightweight composite can be a suitable alternative for small scales loading conditions, such as brake bad and clutch plates in the automobile industry.
Study of dielectric and electromagnetic shielding behaviour of BaTiO3‐CoFe2O4 filled LDPE composite
Authors: Vaid Kriti , Chaurasia Amit , Rathore Deepshikha , Singhal Rahul , Dwivedi Umesh Kumar 
Published: October 2020

AbstractThis paper reports the formation of BaTiO3/CoFe2O4 (BT‐CFO) filled low‐density‐polyethylene (LDPE) composite via the process of melt mixing and characterization for their dielectric and electromagnetic shielding behaviors. The X‐Ray diffraction (XRD) result of synthesized CoFe2O4 shows the cubic phase structure formation with a crystallite size of 28.6 nm. The BT nanopowder and synthesized nanopowder of Cobalt ferrite (CFO) were mixed together in an equal amount (50:50), and sintered at 800°C for 1 hour. A series of samples of BT‐CFO was prepared by taking a different amount of BT‐CFO (ie, 4, 8, 12, 16, and 20 wt%) with LDPE. The dielectric measurements of BT‐CFO/LDPE composites were carried out at different temperatures using LCR meter at a frequency range from 40 Hz to 5 MHz. The dielectric behaviour of samples exhibited a change in dielectric constant with an increase in temperature and frequency. The electromagnetic shielding measurements were examined over X‐band with a frequency range from 8.2GHz to 12.4GHz of the prepared BT‐CFO/LDPE composites. The EMI shielding effectiveness of prepared BT‐CFO/LDPE composites exhibited a maximum value of 17.9 dB.
Machaerium acutifolium compounds with larvicidal activity against Aedes aegypti
Authors: Melo Sebastião J , Sousa João Paulo B , Sá Maíra G , Morais Laís S , Magalhães Natália MG , Gouveia Fernando N , Albernaz Lorena C , Espindola Laila S 
Published: October 2020

AbstractBACKGROUNDPlant extracts and isolated compounds are known for their insecticidal activity. The Aedes aegypti mosquito has a significant medical impact as it transmits a number of arboviruses and is able to develop resistance to the commercially available insecticides. This study investigates larvicidal compounds isolated from Machaerium acutifolium, designated by the Brazilian Forest Service as a sustainable species.RESULTSA M. acutifolium trunk ethyl acetate extract was fractionated using chromatographic methods with full structural elucidation by mass spectrometry (MS), nuclear magnetic resonance and specific rotation analyses revealing: one new 3‐arylcoumarin derivative 1; two flavonoids 2 and 3; a trans‐stilbene 4, and an unprecedented natural indene 5. The larvicidal activity against Ae. aegypti after 24 h exposure was: crude extract (median lethal dose, LC50 205 mg L–1), fraction C (LC50 27 mg L–1) and 5 (LC50 24 mg L–1).CONCLUSIONA M. acutifolium extract showed larvicidal activity, which increased with prolonged exposure, demonstrating LC50 75 mg L–1 after 72 h. Although the flavonoids 2 and 3 and trans‐stilbene 4 were deemed inactive according to the adopted mortality limit, additional tests revealed their ability to cause 65% Ae. aegypti larvae mortality, suggesting they could contribute to the larvicidal activity. Compound 5, identified by liquid chromatography‐MS, was over eight‐fold more toxic to larvae than the crude extract after 24 h. Therefore, 5 constitutes a structural model for new prototypes to control Ae. aegypti. These data reinforce the potential of natural products as a source of commercial alternatives for vector control strategies, respecting both sustainability and eco‐friendly principles. © 2020 Society of Chemical Industry
Ordering trees by their ABC spectral radii
Authors: Lin Wenshui , Yan Zhangyong , Fu Peifang , Liu Jia‐Bao 
Published: October 2020

AbstractLet G = (V, E) be a connected graph, where V = {v1, v2, …, vn}. Let di denote the degree of vertex vi. The ABC matrix of G is defined as M(G) = (mij)n × n, where if vivj ∈ E, and 0 otherwise. The ABC spectral radius of G is the largest eigenvalue of M(G). In the present paper, two graph perturbations with respect to ABC spectral radius are established. By applying these perturbations, the trees with the third, fourth, and fifth largest ABC spectral radii are determined.
Robust iterative learning control for linear continuous systems with vector relative degree under varying input trail lengths and random initial state shifts
Authors: Wei Yun‐Shan , Li Xiao‐Dong 
Published: October 2020

SummaryFor linear continuous multiple‐input multiple‐output systems with vector relative degree, which operate repetitively with an input‐driven motion and a following autonomous motion over a finite time interval, this article proposes an iteratively moving average operator (IMAO) based D‐type iterative learning control (ILC) method to address the iteratively varying input trail lengths and random initial state shifts. The proposed ILC algorithm has a rectifying action to random initial state shifts at the designed initial time interval. From the terminal time of rectifying action to the end of control input, it makes the ILC tracking error convergent into a bounded range, the bound of which is proportional to the initial state shifts. Specifically, as the initial state shifts remain fixed, the ILC tracking error can be driven to zero at the relevant time interval along the iteration axis. An example manifests the validity of the proposed IMAO based D‐type ILC algorithm.
Relationship of amyloid beta and neurofibrillary tau deposition in Neurodegeneration in Aging Down Syndrome (NiAD) study at baseline
Authors: Tudorascu DL , Laymon CM , Zammit M , Minhas DS , Anderson SJ , Ellison PA , Zaman S , Ances BM , Sabbagh M , Johnson SC , Mathis CA , Klunk WE , Handen BL , Christian BT , Cohen AD 
Published: October 2020

AbstractImportanceAdults with Down syndrome (DS) are at high‐risk of revealing Alzheimer's disease (AD) pathology, in part due to the triplication of chromosome 21 encoding the amyloid precursor protein. Adults with DS are uniformly affected by AD pathology by their 30′s and have a 70% to 80% chance of clinical dementia by their 60′s. Our previous studies have assessed longitudinal changes in amyloid beta (Aβ) accumulation in DS.ObjectiveThe goal of the present study was to assess the presence of brain tau using [18F]AV‐1451 positron emission tomography (PET) in DS and to assess the relationship of brain tau pathology to Aβ using Pittsburgh Compound B (PiB)‐PET.DesignCohort studySettingMulti‐center studyParticipantsParticipants consisted of a sample of individuals with DS and sibling controls recruited from the community; exclusion criteria included contraindications for magnetic resonance imaging (MRI) and/or a medical or psychiatric condition that impaired cognitive functioning.ExposuresPET brain scans to assess Aβ ([11C]PiB) and tau ([18F]AV‐1451) burden.Main outcomes and measuresMultiple linear regression models (adjusted for chronological age, sex and performance site) were used to examine associations between regional [18F]AV‐1451 standard uptake value ratio (SUVR) (based on regions associated with Braak stages 1‐6) and global [11C]PiB SUVR (as both a continuous and dichotomous variable).ResultsA cohort of 156 participants (mean age = 39.05, SD(8.4)) were examined. These results revealed a significant relationship between in vivo Aβ and tau pathology in DS. As a dichotomous variable, [18F]AV‐1451 retention was higher in each Braak region in PiB(+) participants. We also found, based on our statistical models, starting with the Braak 3 region of interest (ROI), an acceleration of [18F]AV‐1451 SUVR deposition with [11C]PiB SUVR increases.
Transparent Integration and Sharing of Life Cycle Sustainability Data with Provenance
Authors: Hansen Emil Riis , Lissandrini Matteo , Ghose Agneta , Løkke Søren , Thomsen Christian , Hose Katja 
Published: October 2020

AbstractLife Cycle Sustainability Analysis (LCSA) studies the complex processes describing product life cycles and their impact on the environment, economy, and society. Effective and transparent sustainability assessment requires access to data from a variety of heterogeneous sources across countries, scientific and ecsonomic sectors, and institutions. Moreover, given their important role for governments and policymakers, the results of many different steps of this analysis should be made freely available, alongside the information about how they have been computed in order to ensure accountability. In this paper, we describe how Semantic Web technologies in general and PROV-O in particular, are used to enable transparent sharing and integration of datasets for LCSA. We describe the challenges we encountered in helping a community of domain experts with no prior expertise in Semantic Web technologies to fully overcome the limitations of their current practice in integrating and sharing open data. This resulted in the first nucleus of an open data repository of information about global production. Furthermore, we describe how we enable domain experts to track the provenance of particular pieces of information that are crucial in higher-level analysis.
The Λ-BMS4 charge algebra
Authors: Compère Geoffrey , Fiorucci Adrien , Ruzziconi Romain 
Published: October 2020

Abstract
The surface charge algebra of generic asymptotically locally (A)dS4 spacetimes without matter is derived without assuming any boundary conditions. Surface charges associated with Weyl rescalings are vanishing while the boundary diffeomorphism charge algebra is non-trivially represented without central extension. The Λ-BMS4 charge algebra is obtained after specifying a boundary foliation and a boundary measure. The existence of the flat limit requires the addition of corner terms in the action and symplectic structure that are defined from the boundary foliation and measure. The flat limit then reproduces the BMS4 charge algebra of supertranslations and super-Lorentz transformations acting on asymptotically locally flat spacetimes. The BMS4 surface charges represent the BMS4 algebra without central extension at the corners of null infinity under the standard Dirac bracket, which implies that the BMS4 flux algebra admits no non-trivial central extension.
Structure of two-loop SMEFT anomalous dimensions via on-shell methods
Authors: Bern Zvi , Parra-Martinez Julio , Sawyer Eric 
Published: October 2020

Abstract
We describe on-shell methods for computing one- and two-loop anomalous dimensions in the context of effective field theories containing higher-dimension operators. We also summarize methods for computing one-loop amplitudes, which are used as inputs to the computation of two-loop anomalous dimensions, and we explain how the structure of rational terms and judicious renormalization scheme choices can lead to additional vanishing terms in the anomalous dimension matrix at two loops. We describe the two-loop implications for the Standard Model Effective Field Theory (SMEFT). As a by-product of this analysis we verify a variety of one-loop SMEFT anomalous dimensions computed by Alonso, Jenkins, Manohar and Trott.
Confronting same-sign W-boson production with parton correlations
Authors: Cotogno Sabrina , Kasemets Tomas , Myska Miroslav 
Published: October 2020

Abstract
The future runs of LHC offer a unique opportunity to measure correlations between two partons inside the proton, which have never been experimentally detected. The process of interest is the production of two positively charged W-bosons decaying in the muon channel. We present a detailed analysis of proton-proton collisions at $$ \sqrt{s} $$

s

= 13 TeV, where we combine Monte Carlo event generators with our calculations of parton correlations. We carefully compare double parton scattering to relevant background processes and trace a path towards a clean signal sample. Several observables are constructed to demonstrate the effect of parton correlations with respect to clear benchmark values for uncorrelated scatterings. We find that especially spin correlations can be responsible for large effects in the variables we study, because of their direct relation with the parton angular momentum and, therefore, the directions of the muon momenta. We estimate the significance of the measurements as a function of the integrated luminosity and conclude that the LHC has the potential to detect, or put strong limits on, parton correlations in the near future.
Hyperbolic Harmonic Functions and Hyperbolic Brownian Motion
Authors: Eriksson Sirkka-Liisa , Kaarakka Terhi 
Published: October 2020

Abstract
We study harmonic functions with respect to the Riemannian metric $$\begin{aligned} ds^{2}=\frac{dx_{1}^{2}+\cdots +dx_{n}^{2}}{x_{n}^{\frac{2\alpha }{n-2}}} \end{aligned}$$

d

s
2

=

d

x

1

2

+
⋯
+
d

x

n

2

x

n

2
α

n
-
2

in the upper half space $$\mathbb {R}_{+}^{n}=\{\left( x_{1},\ldots ,x_{n}\right) \in \mathbb {R}^{n}:x_{n}>0\}$$

R

+

n

=

{

x
1

,
…
,

x
n

∈

R

n

:

x
n

>
0
}

. They are called $$\alpha $$
α
-hyperbolic harmonic. An important result is that a function f is $$\alpha $$
α
-hyperbolic harmonic íf and only if the function $$g\left( x\right) =x_{n}^{-\frac{ 2-n+\alpha }{2}}f\left( x\right) $$

g

x

=

x

n

-

2
-
n
+
α

2

f

x

is the eigenfunction of the hyperbolic Laplace operator $$\bigtriangleup _{h}=x_{n}^{2}\triangle -\left( n-2\right) x_{n}\frac{\partial }{\partial x_{n}}$$

△
h

=

x

n

2

▵
-

n
-
2

x
n

∂

∂

x
n

corresponding to the eigenvalue $$\ \frac{1}{4}\left( \left( \alpha +1\right) ^{2}-\left( n-1\right) ^{2}\right) =0$$

1
4

α
+
1

2

-

n
-
1

2

=
0

. This means that in case $$\alpha =n-2$$

α
=
n
-
2

, the $$n-2$$

n
-
2

-hyperbolic harmonic functions are harmonic with respect to the hyperbolic metric of the Poincaré upper half-space. We are presenting some connections of $$\alpha $$
α
-hyperbolic functions to the generalized hyperbolic Brownian motion. These results are similar as in case of harmonic functions with respect to usual Laplace and Brownian motion.
Factors influencing the mat forming process via aerodynamic spreading in cement-bonded particleboard production
Authors: Direske Martin , Procházka Jiří , Wenderdel Christoph 
Published: October 2020

AbstractThe production of three-layered cement-bonded particleboards (CBPB) differs in most cases from that of adhesively bonded particleboards. However, one production step is quite similar: mat forming. A homogeneous mat is formed by aerodynamic or by mechanical spreading or by a combination of both methods. The distribution of the particles is influenced by their separation and flight characteristics. Those characteristics are in turn influenced by particle size and the combination of the particle’s surface area and weight. Because density of cement is higher than that of wood, the cement/wood (c/w) ratio will influence the particles’ separation and flight characteristics significantly. In the current study, laboratory-made particles of different sizes were mixed with different amounts of cement. An aerodynamic former was then used to help determine the influence of the different particle types and the c/w ratio of the mix on mat forming. The strewn particles were analysed for their distribution of mass, size and cement content as a function of spreading distance. The particle size decreased with increasing spreading distance. In addition, the cement content and spreading distance were positively correlated. For a c/w ratio of 1.9, increasing cement content correlated with increasing distance. This means, large particles and less cement tended to fall earlier than smaller ones and more cement. This corresponds to the observation that the specific surface area of the particles increases with increasing spreading distance. Vice versa, the density of the particles decreases with increasing spreading distance. The effect is more apparent when the particle mixture is heterogeneous in size at constant process parameters (e.g., air velocity). Looking at the density profile of a CBPB board, the surface layers consist of small particles with a higher cement fraction, and the core layer consists of large particles with smaller cement fraction. Thus, the production of CBPB requires two aerodynamic formers working in opposite directions. With the results of this study, it is possible to optimise production parameters, such as the speed of the transport caul and the air velocity with regard to the infeed raw material parameters in order to create a symmetrical particle distribution from top to bottom of the mat, resulting in an optimized and application-oriented density profile.
HMGB1: an important regulator of myeloid differentiation and acute myeloid leukemia as well as a promising therapeutic target
Authors: Liu Lulu , Zhang Jingjing , Zhang Xianning , Cheng Panpan , Liu Lei , Huang Qian , Liu Haihui , Ren Saisai , Wei Peng , Wang Cuiling , Dou Cuiyun , Chen Lulu , Liu Xin , Zhang Hao , Chen Mingtai 
Published: October 2020

AbstractHigh mobility group box 1 (HMGB1) is a non-histone nuclear protein which has been intensively studied in various physiological and pathological processes including leukemia. Here in this study, we further demonstrated that HMGB1 presents higher expression in the bone marrow mononuclear cells of acute myeloid leukemia (AML) patients compared with the normal controls and contributes to the AML pathogenesis and progression by inhibiting apoptosis, facilitating proliferation, and inducing myeloid differentiation blockade of AML cells. Mechanistic investigation revealed that transforming growth factor beta-induced (TGFBI) acts as a potential downstream target of HMGB1 and lentivirus-mediated knockdown of TGFBI expression impaired phorbol-12-myristate-13-acetate (PMA) and all-trans retinoic acid (ATRA)–induced myeloid differentiation of AML cell lines. On the other hand, chidamide, an orally histone deacetylase inhibitor, decreases HMGB1 expression significantly in AML cells with concomitant upregulation of TGFBI expression, and confers therapeutic effect on AML by inducing cell differentiation, apoptosis and inhibiting cell proliferation. In conclusion, our findings provide additional insights that HMGB1 is a promising therapeutic target of AML, and also present experimental evidence for the clinical application of chidamide as a novel agent in AML therapy by downregulating HMGB1 expression.Key messagesHMGB1 induces cell proliferation and myeloid differentiation blockade and inhibits apoptosis of AML cells.TGFBI acts as a potential target of HMGB1.Chidamide, a selective HDAC inhibitor, confers promising therapeutic effect for AML via downregulating HMGB1 expression.
Identification and mapping of new genes for resistance to downy mildew in lettuce
Authors: Parra Lorena , Nortman Kazuko , Sah Anil , Truco Maria Jose , Ochoa Oswaldo , Michelmore Richard 
Published: October 2020

AbstractKey messageEleven new major resistance genes for lettuce downy mildew were introgressed from wildLactucaspecies and mapped to small regions in the lettuce genome.AbstractDowny mildew, caused by the oomycete pathogenBremia lactucaeRegel, is the most important disease of lettuce (Lactuca sativaL.). The most effective method to control this disease is by using resistant cultivars expressing dominant resistance genes (Dmgenes). In order to counter changes in pathogen virulence, multiple resistance genes have been introgressed from wild species by repeated backcrosses to cultivated lettuce, resulting in numerous near-isogenic lines (NILs) only differing for small chromosome regions that are associated with resistance. Low-pass, whole genome sequencing of 11 NILs was used to identify the chromosome segments introgressed from the wild donor species. This located the candidate chromosomal positions for resistance genes as well as additional segments. F2segregating populations derived from these NILs were used to genetically map the resistance genes to one or two loci in the lettuce reference genome. Precise knowledge of the location of newDmgenes provides the foundation for marker-assisted selection to breed cultivars with multiple genes for resistance to downy mildew.
Rational curves on fibered varieties
Authors: Anella Fabrizio 
Published: October 2020

AbstractLetXbe a complex projective variety with log terminal singularities and vanishing augmented irregularity. In this paper, we prove that ifXadmits a relatively minimal genus-one fibration, then it contains a subvariety of codimension one covered by rational curves contracted by the fibration. We then focus on the case of varieties with numerically trivial canonical bundle and we discuss several consequences of this result.