bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparison of a viscoelastic point‐of‐care coagulation monitor with thromboelastography in sick dogs with hemostatic abnormalities
Authors: Buriko Yekaterina , Chalifoux Nolan V. , Clarkin‐Breslin Rachel , Silverstein Deborah C.
Published: February 2023

Background

Viscoelastic coagulation monitor (VCM‐Vet) is a point‐of‐care device that has been used to characterize hemostatic abnormalities in sick pets but has not been validated in veterinary patients.

Objectives

We aimed to compare VCM‐Vet and thromboelastography (TEG) in sick dogs with suspected disorders of hemostasis.

Methods

Duplicate VCM‐Vet tests using untreated native blood performed concurrently on two VCM‐Vet machines, and simultaneous TEG tests were performed (one citrated native (CN), and one activated with tissue factor (TF) at a 1:3600 dilution). Each VCM‐Vet result was compared with both TF‐activated and CN TEG.

Results

Fifty‐three dogs were enrolled. Eleven cases displayed apparent hyperfibrinolysis. Spearman correlation coefficients for individual VCM‐Vet devices and CN and TF TEG were obtained between R and CT values and ranged from 0.21 to 0.27, CFT and K (r = 0.60–0.67), angles (r = 0.51–0.62), and MCF and MA (r = 0.85–0.87). Comparison of the two VCM‐Vet devices displayed positive correlations for all clot formation parameters with Lin's concordance correlation coefficients of 0.75–0.95. Variable lysis parameter agreement existed between the VCM‐Vet devices and VCM‐Vet and TEG. When samples were classified as hypercoagulable or coagulopathic, VCM‐Vet had a low positive predictive value (17–33%) for the detection of hypercoagulable states and a moderate negative predictive value (64–74%) for the detection of coagulopathy as defined by TEG.

Conclusions

VCM‐Vet and TEG had variable correlations in clot formation values and a strong correlation for final clot strength. More information is needed to make conclusions about the lysis parameters. Artifact in the fibrinolysis portion of the test can confound the interpretation of VCM‐Vet results.
A complete COI library of Samoan butterflies reveals layers of endemic diversity on oceanic islands
Authors: Bruschini Claudia , Edwards Eric D. , Talavera Gerard , Vaurasi Varea D. , Latu Galumalemana F. , Dapporto Leonardo
Published: February 2023

We investigated the entire butterfly fauna of the Samoan Archipelago (Pacific Ocean) by combining COI barcode sequences for specimens from these islands with those available in repositories at larger biogeographic scale. Haplotype networks and a generalized mixed Yule‐coalescent (GMYC) model were applied to identify evolutionary significant units (ESUs). The ESUs from Samoan islands were compared with ESUs of the same or sister taxa regionally and worldwide to explore the level of endemicity and of congruence between established taxonomy and COI barcodes. The level of ESUs endemicity was similar to that shown by species and subspecies. Australia was the most frequent origin for Samoan lineages, followed by Orient‐Asia. When comparing the agreement and mismatch between established taxonomy and ESUs between the Australia‐Oceania region and Europe and North America, the COI molecular marker revealed a similar performance in taxonomic identification. Despite this overall convergent pattern, the degree of mtDNA divergence and the analysis of functional traits suggested that the mechanisms producing patterns of genetic differentiation in temperate butterflies over ancient continental lands differ to those occurring across a vast ocean into geologically young islands. Mechanisms on Samoan islands include relatively recent and exceptional oceanic dispersal, possibly followed by repeated extinction events. In the Australia‐Oceania region we found a similar fraction of species showing introgression with the maintenance of phenotypic differences as it occurs on the mainland, but the phenomenon was limited to sectors of each species distribution area. Regular gene flow among the Samoan islands seems to prevent allopatric speciation within the archipelago.
THE MANY WORRIES OF MANY WORLDS
Authors: Qureshi‐Hurst Emily
Published: February 2023

Theological engagement with quantum mechanics has been dominated by the Copenhagen interpretation, failing to reflect the fact that philosophers and physicists alike are increasingly moving away from the Copenhagen interpretation in favor of other approaches. One such approach, Hugh Everett's so‐called Many Worlds Interpretation (MWI), is being taken increasingly seriously. As the MWI's credibility grows, it is imperative that metaphysicians, theologians, and philosophers of religion engage with its ideas and their implications. This article does just that, setting out some implications of Everettian Quantum Mechanics that are particularly relevant to theism. It argues that taking seriously the radical consequences of the Everett interpretation means facing at least three major worries for theism pertaining to personal identity, the problem of evil, and salvation. The article concludes by calling on theologians and philosophers of religion to address these worries, in order that these matters of religious significance remain both coherent and credible if the MWI turns out to be correct.
QUANTUM THEOLOGY BEYOND COPENHAGEN: TAKING FUNDAMENTALISM LITERALLY
Authors: Harris Mark
Published: February 2023

Theological engagement with quantum physics has, to this day, been dominated by the Copenhagen interpretation. However, philosophers and physicists working in the “quantum foundations” field have largely abandoned the Copenhagen view on account of what is widely seen as its troublesome antirealism. Other metaphysical approaches have come to the fore instead, which often take a strongly realist flavor, such as de Broglie‐Bohm, or Everett's “Many‐Worlds” interpretation. In the spirit of recent quantum foundations work, this article introduces a collection of studies aimed at taking quantum theology “beyond Copenhagen.” The present article advocates a commitment to “quantum fundamentalism,” which could resolve some of the enduring ontological problems faced by existing theological work with quantum mechanics, especially in discussions of quantum special divine action. Taking quantum fundamentalism literally would mean a departure from the Copenhagen interpretation, and the article suggests the need for a new research program to lay the groundwork in the natural theology of quantum foundations.
Tras la memoria de un mártir: la vida de Tiberio Fernández Mafla
Authors: Martínez Morales Darío
Published: February 2023

Este artículo rescata la memoria y narra la vida del presbítero católico Tiberio Fernández Mafla. Pretende visibilizar lo invisibilizado en ruptura con el olvido que cierta lógica histórica dominante arroja sobre las víctimas relegadas por el mantenimiento del “orden establecido”. Aspira a recuperar y reconstruir su vida, su activismo social, su compromiso cristiano, su martirio y la injusticia cometida contra su comunidad y contra él. El periplo vital de Tiberio Fernández Mafla se presenta segmentado en cuatro periodos. El primero reconstruye el entorno de su niñez y primera juventud a pesar de la poca información con la que se cuenta al respecto; el segundo aborda su formación y trabajo en el Instituto Mayor Campesino, IMCA. Aquí es importante hacer memoria acerca de este importante centro de formación del campesinado colombiano y mostrar el decisivo influjo que el modelo de organización cooperativa tuvo sobre Tiberio, quien se encargó de promoverlo con pasión; el tercero se ocupa de su preparación sacerdotal, de su paso por el Seminario Nacional de Cristo Sacerdote, en La Ceja (Antioquia), para realizar su formación en Filosofía (1970-1972), y de su paso por la Facultad de Teología de la Pontificia Universidad Javeriana de Bogotá, para realizar sus estudios en Teología (1974-1977) ; el cuarto contextualiza su labor como párroco en la población de Trujillo, entre los años 1985 y 1990. Su trabajo pastoral y su estrategia de promoción social basada en la organización cooperativa se convirtió en el blanco de la violencia desatada entre las guerrillas izquierdista del Ejército de Liberación Nacional, ELN, y grupos narco-paramilitares en connivencia con agentes del Estado. En la denominada “masacre de Trujillo”, Tiberio y los integrantes de muchas de las asociaciones cooperativas fueron cruentamente asesinados y sus organizaciones destruidas. Al hacer presente la injusticia del pasado, este texto pretende recordar la vida del presbítero Tiberio Fernández y de todas las víctimas que murieron con él, y vincular dicha injusticia a la injusticia actual, concretada en la estigmatización y el asesinato de líderes comunales, defensores de derechos humanos y activistas sociales.
Investigation on the Long-Term Stability of Multiple Salt Caverns Underground Gas Storage With Interlayers
Authors: Peng Jinghong , Zhou Jun , Liang Guangchuan , Peng Cao , Hu Chengqgiang , Guo Dingfei
Published: February 2023

Salt cavern underground gas storage (UGS) has attracted more and more attention worldwide for high peak shaving efficiency and high short-term throughput. To ensure the safe operation of this type of UGS, it is necessary to evaluate and analyze its stability. This paper investigates the influences of interlayers and cavern interactions on salt cavern UGS's stability. A 3D geomechanical model of double-salt cavern UGS with interlayers is established based on the geological data and creep constitutive relation of salt rock. Based on the long-term creep numerical simulation, the influences of interlayer number, interlayer thickness, interlayer dip angle, interlayer stiffness, cavern spacing, and cavern pressure difference on the deformation of caverns and stability performance of UGS are studied. The results show that the UGS with greater interlayer numbers has larger cavern deformation. The increase in interlayer thickness will improve the deformation resistance of caverns, but the effect is not obvious. The UGS with an interlayer dip angle of 12.5 deg has the best stability. Soft interlayer will decrease the deformation resistance of caverns, while hard interlayer has the opposite effect. In addition, the UGS stability can be enhanced by reducing the pressure difference between adjacent caverns. It is reasonable that the cavern spacing is twice the cavern diameter, which is beneficial to the UGS stability and will not cause a waste of salt rock resources. Finally, the corresponding production and construction control measures are discussed according to each factor's influence degree.
The Effects of Subthreshold Vibratory Noise on Cortical Activity During Motor Imagery
Authors: Lakshminarayanan Kishor , Shah Rakshit , Yao Yifei , Madathil Deepa
Published: February 2023

Previous studies have demonstrated that both visual and proprioceptive feedback play vital roles in mental practice of movements. Tactile sensation has been shown to improve with peripheral sensory stimulation via imperceptible vibratory noise by stimulating the sensorimotor cortex. With both proprioception and tactile sensation sharing the same population of posterior parietal neurons encoding within high-level spatial representations, the effect of imperceptible vibratory noise on motor imagery-based brain–computer interface is unknown. The objective of this study was to investigate the effects of this sensory stimulation via imperceptible vibratory noise applied to the index fingertip in improving motor imagery–based brain–computer interface performance. Fifteen healthy adults (nine males and six females) were studied. Each subject performed three motor imagery tasks, namely drinking, grabbing, and flexion–extension of the wrist, with and without sensory stimulation while being presented a rich immersive visual scenario through a virtual reality headset. Results showed that vibratory noise increased event-related desynchronization during motor imagery compared with no vibration. Furthermore, the task classification percentage was higher with vibration when the tasks were discriminated using a machine learning algorithm. In conclusion, subthreshold random frequency vibration affected motor imagery–related event-related desynchronization and improved task classification performance.
DUX4 double whammy: The transcription factor that causes a rare muscular dystrophy also kills the precursors of the human nose
Authors: Inoue Kaoru , Bostan Hamed , Browne MaKenna R. , Bevis Owen F. , Bortner Carl D. , Moore Steven A. , Stence Aaron A. , Martin Negin P. , Chen Shih-Heng , Burkholder Adam B. , Li Jian-Liang , Shaw Natalie D.
Published: February 2023

SMCHD1
mutations cause congenital arhinia (absent nose) and a muscular dystrophy called FSHD2. In FSHD2, loss of SMCHD1 repressive activity causes expression of double homeobox 4 (DUX4) in muscle tissue, where it is toxic. Studies of arhinia patients suggest a primary defect in nasal placode cells (human nose progenitors). Here, we show that upon SMCHD1 ablation, DUX4 becomes derepressed in H9 human embryonic stem cells (hESCs) as they differentiate toward a placode cell fate, triggering cell death. Arhinia and FSHD2 patient-derived induced pluripotent stem cells (iPSCs) express DUX4 when converted to placode cells and demonstrate variable degrees of cell death, suggesting an environmental disease modifier. HSV-1 may be one such modifier as herpesvirus infection amplifies DUX4 expression in SMCHD1 KO hESC and patient iPSC. These studies suggest that arhinia, like FSHD2, is due to compromised SMCHD1 repressive activity in a cell-specific context and provide evidence for an environmental modifier.
Vitality surveillance at distance using thin-film tandem-like narrowband near-infrared photodiodes with light-enhanced responsivity
Authors: Ollearo Riccardo , Ma Xiao , Akkerman Hylke B. , Fattori Marco , Dyson Matthew J. , van Breemen Albert J. J. M. , Meskers Stefan C. J. , Dijkstra Wijnand , Janssen René A. J. , Gelinck Gerwin H.
Published: February 2023

Remote measurement of vital sign parameters like heartbeat and respiration rate represents a compelling challenge in monitoring an individual’s health in a noninvasive way. This could be achieved by large field-of-view, easy-to-integrate unobtrusive sensors, such as large-area thin-film photodiodes. At long distances, however, discriminating weak light signals from background disturbance demands superior near-infrared (NIR) sensitivity and optical noise tolerance. Here, we report an inherently narrowband solution–processed, thin-film photodiode with ultrahigh and controllable NIR responsivity based on a tandem-like perovskite-organic architecture. The device has low dark currents (<10
−6
mA cm
−2
), linear dynamic range >150 dB, and operational stability over time (>8 hours). With a narrowband quantum efficiency that can exceed 200% at 850 nm and intrinsic filtering of other wavelengths to limit optical noise, the device exhibits higher tolerance to background light than optically filtered silicon-based sensors. We demonstrate its potential in remote monitoring by measuring the heart rate and respiration rate from distances up to 130 cm in reflection.
Supplemental Material: Dating rare earth element enrichment in deep-sea sediments using U-Pb geochronology of bioapatite
Authors: Li Dengfeng , al. et
Published: February 2023

Detailed fish teeth separation and mounting procedures, scanning electron microscope (SEM) observations, and laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) analytical procedures for trace-element analyses and U-Pb dating. 
Rare case of Lyme borreliosis in a patient presenting with dactylitis and skin rash
Authors: Steppat Axel , Skaarup Andersen Nanna , Andreasen Caroline Marie
Published: February 2023

An immunocompetent male in his 70s was diagnosed with psoriatic arthritis based on dactylitis, onycholysis of the nails and scalp psoriasis. He was treated with corticosteroids, methotrexate and local corticosteroid injections without improvements in his symptoms. When tumor necrosis factor-alpha inhibitor treatment was introduced, the symptoms worsened and dactylitis of all digits and a bluish-red rash were observed on the extensor side of the left hand and arm. At this point, a skin biopsy was performed showing histopathological changes compatible with Lyme borreliosis and serum contained IgG antibodies againstBorrelia burgdorferi. It was concluded that he was suffering from acrodermatitis chronica atrophicans (ACA) and Lyme dactylitis. Ten days of phenoxymethylpenicillin treatment was initiated, and after 2 weeks, the dactylitis and ACA had regressed substantially. After 6 months, both had resolved. This case emphasises the need for clinical reassessment, when treatment is not effective.
Eccentric, but not concentric muscle contraction induce inflammation and impairs fibrinolysis in healthy young men
Authors: Teixeira Bruno Costa , Boeno Franccesco Pinto , Geremia Jeam Marcel , Correa Cleiton da Silva , Lopes André Luiz , Macedo Rodrigo Cauduro Oliveira , Carteri Randhall Bruce Kreismann , Bandinelli Eliane , Vaz Marco Aurélio , Ribeiro Jerri Luiz , Reischak-Oliveira Alvaro
Published: February 2023

Different types of muscle contraction can cause different damage to the musculature and differences in inflammatory responses. Acute increases in circulatory inflammation markers can influence the crosstalk between coagulation and fibrinolysis processes, increasing the risk of thrombus formation and detrimental cardiovascular events. The aim of this study was to analyze the effects of concentric and eccentric exercise on hemostasis markers, C-reactive protein (CRP), and the relationship between these variables. Eleven healthy subjects with a mean age of 25.4 ± 2.8, non-smokers, with no history of cardiovascular disease and blood type O, randomly performed an isokinetic exercise protocol consisting of 75 concentric (CP) or eccentric (EP) contractions of knee extension, divided into five sets of 15 repetitions combined with 30-s rest. Blood samples for analysis of FVIII, von Willebrand factor, tissue plasminogen activator (t-PA), plasminogen activator inhibitor type-1 (PAI-1), and CRP were collected pre, post, 24 h, and 48 h after each protocol. Increased levels of CRP at 48 h in EP versus CP ( p = 0.002), increased PAI-1 activity 48 h in EP versus CP ( p = 0.044), and a reduction in t-PA at 48 h when compared with post-protocol in both protocols ( p = 0.001). A correlation was found between CRP and PAI-1 at 48 h of PE ( r2 = 0.69; p = 0.02). This study showed that both EP and CP increase the clotting process, albeit only the exercise performed eccentrically induces inhibition of fibrinolysis. This is possibly due to the increase in PAI-1 48 h after the protocol, which correlates with the increase in inflammation as demonstrated by the CRP levels.
Are riparian habitats always more diverse than nonriparian? A case study with small mammals in a rainforest environment
Authors: Araújo Rodrigo Paulo da Cunha , Galliez Maron , Bergallo Helena Godoy
Published: February 2023

Riparian environments are characterized by a gradient of environmental factors perpendicular to the watercourse, as the habitat changes from terrestrial to aquatic. These areas are highly diverse in comparison with adjacent ecosystems specially in arid and semi-arid regions, a pattern that may not be as marked in other climates where humidity and nutrient gradients are not so abrupt. We aimed to evaluate the diversity of small mammals in riparian and nonriparian environments in an area of Atlantic Forest, as well as the association between habitat structure and small mammal assemblages. A survey was conducted between October 2018 and August 2019 by sampling 17 plots—8 in riparian areas and 9 in nonriparian areas. No differences were found in composition and abundance of small mammals between riparian and nonriparian environments, because habitat structure did not differ between these environments. However, small mammal assemblages were structured by habitat characteristics such as understory obstruction, fallen trunks, and altitude. Water deficits are not marked throughout the year in the study area, therefore there is no such distinction between riparian and nonriparian environments. The most important habitat characteristics for the small mammals were those that represent shelter and resources’ sources.
A simple approximation for the drift rates of rotating polygons on a free fluid surface
Authors: Kadlecsik Ádám , Szeidemann Ákos , Vincze Miklós
Published: February 2023

We report on laboratory experiments investigating the dynamics of a free fluid surface in a cylindrical tank with a rotating bottom plate. The shear instability in the system creates polygonal structures, which propagate around the domain, along the fixed vertical sidewalls. We analyze the wavelengths and drift rates of these patterns, which are known from previous literature to be created by a complex interplay between centrifugal effects and gravity wave propagation in this unique geometry. We find that with an empirical correction factor, the drift rates of the polygonal vortices can be approximated fairly well by a surprisingly simple formula derived from the dispersion relation of linear gravity waves using easily observable parameters.
Study on Due-Date Assignment Scheduling with Setup Times and General Truncated Learning Effects
Authors: Feng Yifu , Hu Zonghai , Si Rui , Wang Ji-Bo
Published: February 2023

This paper concentrates on the single-machine scheduling problem with past-sequence-dependent setup times and general truncated learning effects, where the job processing times are non-increasing function of their positions in a sequence. Under common, slack and different (unrestricted) due-date assignments, our goal is to minimize the weighted sum of number of early/tardy jobs and due-date assignment cost, where the weight is not related to the job but to a position, i.e., the position-dependent weight. Under the three due-date assignments, some optimal properties and three optimal solution algorithms are proposed to solve these problems, respectively.
Lax pair, Darboux transformation, Weierstrass–Jacobi elliptic and generalized breathers along with soliton solutions for Benjamin–Bona–Mahony equation
Authors: Rizvi Syed T. R. , Seadawy Aly R. , Ahmed Sarfaraz , Ashraf R.
Published: February 2023

This paper studies the Lax pair (LP) of the [Formula: see text]-dimensional Benjamin–Bona–Mahony equation (BBBE). Based on the LP, initial solution and Darboux transformation (DT), the analytic one-soliton solution will also be obtained for BBBE. This paper contains a bunch of soliton solutions together with bright, dark, periodic, kink, rational, Weierstrass elliptic and Jacobi elliptic solutions for governing model through the newly developed sub-ODE method. The BBBE has a wide range of applications in modeling long surface gravity waves of small amplitude. In addition, we will evaluate generalized breathers, Akhmediev breathers and standard rogue wave solutions for stated model via appropriate ansatz schemes.
Novel intelligent computing knacks for fuzzy dynamical model of vibrating mass system
Authors: Asghar Mahmoona , Ahmad Iftikhar , Ilyas Hira , Naz Shafaq , ul Basat Najam , Raja Muhammad Asif Zahoor
Published: February 2023

This study is designed to analyze the fuzzy dynamical model of vibrating mass system by using neural networks (NNs). Stochastic numerical solvers are implemented with Levenberg–Marquardt backpropagation (LMB) algorithm. The proposed solvers handle the uncertainties of fuzzy differential system and minimize the error consistently. Validation, constancy and verification of NNs with LMB algorithm are endorsed by attaining reasonable accuracy through statistical measures in terms of error histograms, regression and mean squared errors for different values of fuzzy parameters.
Strain and interfacial defect tailored electronic structures of two-dimensional WSe2/h-BN van der Waals heterostructure
Authors: Lian Shuang , Wu Huifang , Wu Ping , Sun Huijuan , An Yukai
Published: February 2023

In this work, strain and interfacial defect tailored electronic structures of h-BN/WSe2 heterostructure are investigated systematically. The results show that the WSe2/h-BN heterostructure is a direct bandgap semiconductor (1.211[Formula: see text]eV) with type-I band alignment compared with the isolated h-BN and WSe2 monolayers. Applying the in-plane strain can well adjust the electronic structure of heterostructure, resulting in a transition from indirect to direct bandgap at the strain of −2% for the h-BN/WSe2 heterostructures. The bandgap of h-BN/WSe2 heterostructure monotonically increases at the compressive strains from −6% to −2%, whereas decreases at the tensile strains from 0% to 8%. In addition, introducing of vacancy defects and n- or p-type doping can effectively alter the band alignment of heterostructure. When the N and B vacancies or C doping are introduced in the h-BN layer, a significant transform from type-I to type-II band alignment is observed. These results suggest the h-BN/WSe2 heterostructure becomes a good candidate for the application of optoelectronics and nanoelectronics devices.
A New Tunable Gyrator-C-Based Active Inductor Circuit for Low Power Applications
Authors: Gardeshkhah Rasool , Saatlo Ali Naderi
Published: February 2023

A new CMOS implementation of active inductor circuit based on the gyrator-C which is suitable for low-voltage and RF applications is presented in this paper. One of the critical features of active inductors which directly affect their quality factor is their series-loss resistance. In this regard, a multi-regulated cascade stage is employed in the new structure which decreases loss. Moreover, by cascading input transistor, the transistors which determine the self-resonance frequency and quality factor will be separated from each other. This results in arranging properties of designed active inductor independently. The configuration of two-stage conventional gyrators is improved which gives the proposed design more opportunities in determining and tuning its characteristics. Also by employing common-source configuration, low conductance nodes are achieved which decrease the ohm-loss of AI. Furthermore, main properties of design can be tuned without affecting each other. The power consumption of the circuit remains as low as 0.62[Formula: see text]mW, then the circuit is suitable for low power applications. The results showed that AI is suitable for RF applications over 0.2–11.8[Formula: see text]GHz frequency range. In order to verify theoretical calculations, simulations are carried out using HSPICE and level 49 parameters (BSIM3v3) in 130[Formula: see text]nm CMOS technology. In addition, Corner and Monte Carlo analyses are considered to prove the efficiency of the circuit against the process variation.
Fast and slow clustering dynamics of Cucker–Smale ensemble with internal oscillatory phases
Authors: Ha Seung-Yeal , Kim Jeongho , Park Jinyeong
Published: February 2023

We study fast and slow clustering dynamics of Cucker–Smale ensemble with internal phase dynamics via the Cucker–Smale–Kuramoto (in short, CSK) model. The CSK model describes the emergent dynamics of flocking particles with phase dynamics. It consists of the Cucker–Smale flocking model and the Kuramoto model, and their interplay is registered in the communication weight function between particles. We present a sufficient framework for mono-cluster flocking and complete synchronization in terms of system parameters and initial data. In particular, the mono-cluster flocking will emerge exponentially fast (fast dynamics). On the other hand, when initial spatial-velocity configuration is close to the bi-cluster flocking, we also provide a sufficient framework leading to convergence of bi-cluster flocking algebraically slow depending on the decay rate of the communication weight (slow flocking dynamics). We also provide several numerical examples and compare them with analytical results.
THE IMPACT OF NONSINGULAR MEMORY ON THE MATHEMATICAL MODEL OF HEPATITIS C VIRUS
Authors: EVIRGEN FIRAT , UÇAR ESMEHAN , ÖZDEMIR NECATI , ALTUN EREN , ABDELJAWAD THABET
Published: February 2023

In this research, we examine the nonsingular memory effect when implementing the Atangana–Baleanu (AB) fractional derivative in the Caputo sense to the Hepatitis C virus (HCV) model. For this purpose, first, the sufficient conditions for the existence and uniqueness of the solutions under the AB fractional derivative of the model are expressed and proved. Therewithal, in order to show the response of the AB derivative on the system dynamics practically, a new version of the predictor–corrector method is used with the newly estimated model parameters from the literature. Finally, we provide some simulations of the results.
Dynamic Response of Metaconcrete Beam Under Blast Load
Authors: Jin Hexin , Hao Hong , Xu Cheng , Huang Zhijie , Chen Wensu
Published: February 2023

A number of recent studies have demonstrated numerically and experimentally that metaconcrete made of engineered aggregates can mitigate the propagation of stress waves induced by impulsive load. The energy imparted into the metaconcrete structure from impulsive load can be absorbed by engineered aggregates because of the local vibration of heavy cores. The previous studies considered simple 1D metaconcrete bar structure to investigate its effectiveness on mitigating stress wave propagations. The performance of structural components made of metaconcrete under impulsive load has not been investigated yet. In this study, 3D meso-scale models of three typical beams, namely, normal concrete (NC) beam, normal metaconcrete (NMC) beam composed of normal engineered aggregates (NEA) and enhanced metaconcrete (EMC) beam composed of enhanced engineered aggregates (EEA) are generated to investigate the responses of beam structure subjected to impulsive loading. The engineered aggregates NEA and EEA are designed via the software COMSOL to have the bandgaps coincident with the primary frequencies of stress wave generated in NC beam by the considered impulsive loads. Dynamic responses of three beams subjected to near-field blast loads with different scaled distances are studied via the software LS-DYNA. It is found that the EMC beam experiences less compressive and spalling damage than NC and NMC beams subjected to near-field explosion with the scaled distance of 0.15[Formula: see text]m/kg[Formula: see text]. Under blast loading from larger scaled distance explosions, the EMC beam experiences less severe flexural and flexural-shear damage than NC and NMC beams. It can be concluded that the EMC beam demonstrates better blast-resistance performance than NC and NMC beams.
Time-Dependent Reliability Evaluation for the Buckling Limit States of the Purlin with Sheeting Considering Typhoon-Induced Diaphragm Degradation Effect
Authors: Bai Fan , Yang Na
Published: February 2023

Steel sheeting is usually provided at the upper flange of purlin in steel roof with screw connections. The resulting diaphragm effect provided by the sheeting enhances the buckling resistance of the purlin. However, this diaphragm effect will be reduced due to any abnormality in the screw connection caused by wind-induced fatigue particularly from typhoon. This would reduce the buckling resistance of the purlin with sheeting (the purlin-sheeting system), and it would affect subsequent condition evaluation during their service life. This problem is addressed in this paper with a framework of time-dependent reliability evaluation of the buckling limit state of the purlin-sheeting system. The buckling resistance reduction due to the degradation of the diaphragm effect from typhoon is taken into account in the resistance model. The randomness of wind intensity and landfall occurrence of typhoon during the service life of purlin are also accounted for in the wind load effect model. The time-dependent reliability of the purlin at different positions of a roof is studied. Then the variation of reliability of the system due to the effect of climatic changes in the design service life is discussed. The proposed strategy is then applied to the evaluation of a purlin-sheeting system in eleven cities in China with typhoon occurrences with some useful results for future studies in the provisions of the design code.
Homogeneous involutions on graded division algebras and their polynomial identities
Authors: Yasumura Felipe Yukihide
Published: February 2023

In this paper, we describe the so-called homogeneous involution on finite-dimensional graded-division algebra over an algebraically closed field. We also compute their graded polynomial identities with involution. As pointed out by Fonseca and Mello, a homogeneous involution naturally appears when dealing with graded polynomial identities and a compatible involution.
New MWCNT–Maleic Anhydride-Nonene-1 based Additive Material for the Improvement of the Compressive Strength of Concrete
Authors: Malikov Elvin Y.
Published: February 2023

The concrete strengthening additive based on the multi-walled carbon nanotubes was synthesized under mild conditions through a radical polymerization route by the reaction of oxidized nanotubes with maleic anhydride and [Formula: see text]-nonene monomers. The nanotubes used as the main reinforcing component of the additive were synthesized by catalytic chemical vapor deposition (CCVD) using Fe-Co/Al2O3 as the catalyst. The resulting nanocomposite was characterized by structural and surface morphological aspects via transmission electron microscopy (TEM), scanning electron microscopy (SEM), FTIR, XRD and Raman techniques. Investigation of mechanical properties revealed that the obtained nanostructure is an appropriate additive material for concrete strengthening purposes with about 51.3% strengthening potential.
Timber–Prairie Wolf Optimization-Dependent Deep Learning Classifier for Anomaly Detection in Surveillance Videos
Authors: Gayal Baliram Sambhaji , Patil Sandip Raosaheb
Published: February 2023

Anomaly detection in public places using the video surveillance gains significance due to the real-time monitoring and security that ensures the personal assets and public security. Accordingly, in this research, a deep CNN model with Timber–Prairie wolf optimization algorithm (TPWO) optimization is proposed for surveillance-based anomaly detection. To support the TPWO-based deep CNN anomaly detection model, tracking model named OptSpatio tracking model tracks the location and movement of the anomalous objects in any locality. The OptSpatio tracking model uses both visual and spatial tracking models to monitor any anomalous activity. On the other hand, TPWO is designed to tune the deep classifier for acquiring better detection performance. The TPWO-based model surpasses the competent methods in terms of accuracy by 97.214%, sensitivity by 97.831% and specificity by 96.668% with minimal EER of 2.786%. The MOTP values are also obtained at a rate of 0.7325; moreover, the effectiveness of the TPWO method is justified at the object-, frame-, and pixel-level analysis.
k-Ambiguity function in the framework of offset linear canonical transform
Authors: Bhat M. Younus , Dar Aamir H.
Published: February 2023

A new version of ambiguity function (AF) associated with the offset linear canonical transform (OLCT) is considered in this paper. This new version of AF coined as the [Formula: see text]-AF associated with the OLCT ([Formula: see text]-AFOL) is defined based on the OLCT and the fractional instantaneous auto-correlation. A natural magnification effect characterized by the extra degrees of freedom of the OLCT and by a factor [Formula: see text] on the frequency axis enables the [Formula: see text]-AFOL to have flexibility to be used in cross-term reduction. Firstly, we defined the [Formula: see text]-AF associated with the OLCT ([Formula: see text]-AFOL), and establish its relationship with the [Formula: see text]-Wigner distribution in OLCT domain. Later on, we define the basic properties including the scaling, conjugate-symmetry, shifting, marginal and Moyal’s formulae of [Formula: see text]-AFOL in depth. The results show that [Formula: see text]-AFOL can be viewed as one of the generalizations of the classical AF which has elegance, simplicity and flexibility in the frequency marginal property. The novelty of our paper lies in applications part, where we have shown how the proposed transform is used for the detection of single-component and bi-component linear frequency-modulated (LFM) signals.
An Evaluation of Accuracy and Efficiency of a 3D Adaptive Mesh Refinement Method with Analytical Velocity Fields
Authors: Li Zhenquan , Lal Rajnesh
Published: February 2023

Appropriate mesh refinement plays a vital role in the accuracy and convergence of computational fluid dynamics solvers. This work is an extension of the previous work that further demonstrates the accuracy of the 3D adaptive mesh refinement method by comparing the accuracy measures between the ones derived from the analytical fields and those identified by the refined meshes. The adaptive mesh refinement method presented in this study is based on the law of mass conservation for three-dimensional incompressible or compressible steady fluid flows. The assessment of the performance of the adaptive mesh refinement method considers its key features such as drawing closed streamline and identification of singular points, asymptotic planes, and vortex axis. Several illustrative examples of the applications of the 3D mesh refinement method with a multi-level refinement confirm the accuracy and efficiency of the proposed method. Furthermore, the results demonstrate that the adaptive mesh refinement method can provide accurate and reliable qualitative measures of 3D computational fluid dynamics problems.
Late-time acceleration from ekpyrotic bounce in f(Q,T) gravity
Authors: Lalke A. R. , Singh G. P. , Singh A.
Published: February 2023

In this paper, we investigate the late-time accelerated universe evolution in a flat, homogeneous and isotropic model in the context of [Formula: see text] gravity, where [Formula: see text] and [Formula: see text] are non-metricity scalar and trace of energy–momentum tensor, respectively. The scale factor, by construction, yields ekpyrotic contraction era followed by a non-singular bounce. The expanding era of the universe yields late-time dark energy era preceded by matter-dominating decelerating era. The model unifies an ekpyrotic, non-singular bounce with the present dark energy-dominated epoch. The model parameters in the functional form of [Formula: see text] gravity affect the dynamical evolution of the equation of state (EoS) parameter. The theoretical value of EoS parameter is found to be [Formula: see text] for [Formula: see text], respectively, and it lies in range of the estimated value of EoS parameter from the Planck+SNe+BAO observational data. Different aspects of this bouncing model including behavior of geometrical and physical quantities along with energy conditions have been discussed in detail.
Thermodynamic overview and heat engine efficiency of Kerr–Sen–AdS black hole
Authors: Roy Tanusree , Sardar Alok , Debnath Ujjal
Published: February 2023

This paper reflects a study on the thermodynamic features of charged rotating Kerr–Sen–AdS black holes discussed with an extended phase space, where the negative cosmological constant is accounted for pressure. Thermal stability/instability and dependency of the phase transition points on the parameters of a black hole have been discussed further. The authors have systematically studied the throttling process of the black hole considering its mass is identified by its enthalpy. Moreover, the phenomenon of Joule–Thomson expansion has been explored, and inversion temperature for the black hole has been investigated using a numerical approach. Next, a heat engine is constructed by considering the black hole as a working object and subsequently, its efficiency is calculated by considering a rectangular heat cycle in the [Formula: see text]–[Formula: see text] plane. Then the effects of the black hole parameters on its efficiency and their respective roles are studied, followed by a careful comparison of the efficiency with that of a Carnot engine so that the second law of thermodynamics holds true.
On the d-representation of integers
Authors: Yu Wang-Xing , Chen Yong-Gao
Published: February 2023

Let [Formula: see text] be two coprime positive integers. A positive integer [Formula: see text] is said to be [Formula: see text]-representable for [Formula: see text] if [Formula: see text] is the sum of terms taken from [Formula: see text] such that no one divides the other. Let [Formula: see text] denote the set of all positive integers that are [Formula: see text]-representable. For [Formula: see text], let [Formula: see text] be the maximum of the least terms of [Formula: see text]-representations of [Formula: see text] and let [Formula: see text] be the minimum of the largest terms of [Formula: see text]-representations of [Formula: see text]. In 1996, Erdős and Lewin conjectured that [Formula: see text] as [Formula: see text]. Recently, the authors of this paper confirmed this conjecture. This paper concerns the magnitudes of [Formula: see text] and [Formula: see text].
Rankin–Cohen brackets of Eisenstein series
Authors: Xue Hui
Published: February 2023

We prove that Rankin–Cohen brackets of Eisenstein series generate the whole space of cuspforms in several cases. This generalizes the classical result that products of two Eisenstein series generate the whole space of modular forms.
Lacunary eta quotients with identically vanishing coefficients
Authors: Huber Timothy , McLaughlin James , Ye Dongxi
Published: February 2023

For [Formula: see text], define [Formula: see text], and let [Formula: see text] be any of the pairs [Formula: see text] [Formula: see text] [Formula: see text] [Formula: see text] [Formula: see text] [Formula: see text] For any such pair [Formula: see text], define the sequences [Formula: see text] and [Formula: see text] to be the coefficients of [Formula: see text] of [Formula: see text] and [Formula: see text], respectively. Then for each pair it is shown that [Formula: see text] vanishes if and only if [Formula: see text] vanishes. In each case, a criterion is given which states precisely when [Formula: see text]. Moreover, for the pairs [Formula: see text] [Formula: see text] it is shown that [Formula: see text] if [Formula: see text] satisfies a criteria of Serre for [Formula: see text].
Preparation of Mg-Al Layered Double Hydroxides Ultrathin Nanosheets and Its Application in Adsorption of Methyl Orange
Authors: Bai Xue , Shi Antong , Zhang Fenying , Jiang Zhuwu , Liao Dongqi , Zhang Hongyu
Published: February 2023

In this paper, well-defined Mg-Al LDHs nanosheets with high yield are prepared by the following sequential procedures: hydrothermal preparation of Mg-Al-CO[Formula: see text] LDHs, followed by expanding interlayer spacing by NH4NO3 treatment. The results show that the concentration of the layer expansion agent (NH4NO[Formula: see text] and the exfoliation solvent play a key role in the exfoliation result. The basal spacing changed from 0.758[Formula: see text]nm to the range of 0.758–0.895[Formula: see text]nm when the concentration of NH4NO3 was increased up to 5 M, which infers that the increase of layer space is caused by the synergy of NH[Formula: see text] and NO[Formula: see text]. Among the three exfoliation solvents (formamide, N-methyl pyrrolidone and isopropyl alcohol), formamide showed the highest exfoliation effect. From the characteristic XRD patterns, the as-obtained colloidal aggregates of the exfoliated nanosheets do not show the characteristic diffractions of LDHs, while the typical peaks at 10.562[Formula: see text], 20.032[Formula: see text] and 21.185[Formula: see text] assigned to LDHs are observed after drying of the colloidal aggregates. Moreover, a transparent LDH film is also successfully prepared by coating colloidal aggregates of nanosheets on a glass substrate without using any adhesive. The stable film exhibits the strong adsorption ability of Methyl Orange.
Confidence-Based Cheat Detection Through Constrained Order Inference of Temporal Sequences
Authors: Rogers Jon , Aygun Ramazan , Etzkorn Letha
Published: February 2023

For particular domains, duplication may be indicative of cheating or an adversarial act intended to skew data. For Sony’s PlayStation Network (PSN) that services the world’s most popular gaming platform, we observe cheating through duplication of user data in the context of trophies/achievements. This particular domain is representative of the challenges of increasingly prevalent temporal data, where conventional similarity and distance-based deduplication techniques struggle in the context of deduplication. We leverage the Adaptive Sorted Neighborhood Method (ASNM) for temporal domains by applying ASNM, inferring attribute metadata, and performing inference of temporal ordering requirements using subsequence discovery techniques Longest Common Subsequence (LCS) and Needleman–Wunsch (NW). For records of a shared type, we split each record’s time-ordered events into constrained and unconstrained sequences. Through both a binary classification and confidence-based approach, we indicate suspicious (errant) records that do not adhere to the inferred constrained order and may indicate a record as a duplicate if its unconstrained order matches that of another record. ASNM, [Formula: see text] and [Formula: see text] were evaluated against a labeled dataset of 22,794 records from PSN trophy data where duplication may be indicative of cheating. [Formula: see text] resulted in an F1 of 0.949 using the confidence-based approach, outperforming ASNM and [Formula: see text]. ASNM’s best performance was an F1 of 0.708 at the 0.99 similarity threshold; [Formula: see text]’s best performance was an F1 of 0.942 using the confidence-based approach. The significant performance improvement costs little overhead as [Formula: see text] and [Formula: see text] averaged only 3.79% and 5.75% additional runtime, respectively.
Limit theorems for moment processes of beta Dyson’s Brownian motions and beta Laguerre processes
Authors: Nakano Fumihiko , Trinh Hoang Dung , Trinh Khanh Duy
Published: February 2023

In the regime where the parameter beta is proportional to the reciprocal of the system size, it is known that the empirical distribution of Gaussian beta ensembles (respectively, beta Laguerre ensembles) converges weakly to a probability measure of associated Hermite polynomials (respectively, associated Laguerre polynomials), almost surely. Gaussian fluctuations around the limit have been known as well. This paper aims to study a dynamical version of those results. More precisely, we study beta Dyson’s Brownian motions and beta Laguerre processes and establish law of large numbers (LLNs) and central limit theorems (CLTs) for their moment processes in the same regime.