bluuebunny/crossref_metadata_2025 huggingface dataset:
Association of neck circumference-related indices with metabolic, atherogenic and liver function biomarkers in patients with non-alcoholic fatty liver disease: a cross-sectional study
Authors: Arefhosseini Sara , Tutunchi Helda , Tavakkoli Shahrzad , Arefhosseini Seyed Rafie , Ebrahimi-Mameghani Mehrangiz
Published: September 2023

Objective

The present study aimed to establish the association of neck circumference (NC)-related indices with metabolic, atherogenic and liver function biomarkers in patients with non-alcoholic fatty liver disease (NAFLD).

Design

Cross-sectional study.

Setting

Outpatient clinics of Tabriz University of Medical Sciences.

Participants

A total of 175 adult patients with NAFLD diagnosed by abdominal ultrasonography were included in this study. Sociodemographic characteristics, anthropometric measures and metabolic, atherogenic and liver function biomarkers were assessed.

Results

Results on 107 women and 68 men with NAFLD showed that 52%, 45.1% and 2.9% of patients had mild, moderate and severe NAFLD, respectively. There were significant differences in most of the anthropometric indices, serum levels of ferritin, creatinine and uric acid as well as liver enzymes, and Aspartate Aminotransferase (AST) to Platelet Ratio Index (APRI) between the genders (p<0.01). However, no significant differences were found in the glycaemic, lipid profile and atherogenic biomarkers. Both NC and neck-to-height ratio (NHtR) were significantly associated with body mass index (BMI) (p=0.018, p<0.001, respectively), waist circumference (WC) (p<0.001, p=0.044, respectively) and waist-to-hip ratio (WHR) (p<0.001, p=0.026, respectively) while results showed only a significant relationship between neck-to-waist ratio (NWR) with BMI (p<0.001) and WC (p<0.001). Among metabolic factors, there were significant and positive correlations between NC and serum haemoglobin A1c (r=0.198, p<0.001), AST (r=0.300, p<0.001), alanine aminotransferase (ALT) (r=0.348, p<0.001), ferritin (r=0.403, p<0.001) and uric acid (r=0.347, p=0.003) while AST/ALT ratio was inversely related to NC (r=−0.226, p=0.003). APRI, Lipid Accumulation Product Index and also Hepatic Steatosis Index were significantly correlated with NC, NHtR and NWR (p<0.01).

Conclusions and relevance

NC-related indices, particularly NC and NHtR, were correlated with some metabolic and liver function biomarkers (apart from lipid profile and atherogenic factors) in patients with NAFLD.
Facilitators of and barriers to patient and public involvement in building learning health systems in community health services settings: a scoping review protocol
Authors: Hung Lillian , Wong Karen Lok Yi , Chan Ian , Vasarhelyi Krisztina
Published: September 2023

Introduction

The development of learning health systems (LHSs) has often focused on optimally leveraging data. More attention should be paid to patient and public involvement or community engagement in forming learning communities that work together to build LHS. This scoping review aims to identify facilitators of and barriers to involving patients and the public in building LHSs in community health services settings.

Methods and analysis

We will use the Joanna Briggs Institute’s scoping review methodology. We will review literature in English published from 1 January 2007 to 31 December 2022. The databases that will be searched are MEDLINE, CINAHL, Embase, Web of Science, Scopus, AgeLine, PsycINFO and Web of Science. Key inclusion and exclusion criteria include the following: we will only consider a learning community in a community health services context (eg, home care, long-term care, primary care); we will exclude literature on acute care settings; and we will consider any research designs apart from big data analytics. We will review all sources, including university student theses and dissertations. The review will proceed in three steps: (1) we will identify keywords and index terms from the MEDLINE and CINAHL databases; (2) using the keywords and index terms identified in step (1), we will search other databases and (3) we will handsearch the reference lists of the selected literature and will search for grey literature using Google. Two research assistants will screen the titles and abstracts separately, with reference to the inclusion criteria. Two researchers will then assess the full text of selected studies, also in reference to the inclusion criteria. We will present the findings in a charting table and provide a narrative summary.

Ethics and dissemination

This work does not require ethics approval because the data for this scoping review are publicly available. The findings will be presented in a journal article and at conferences.
Incidence of atrial fibrillation in cryptogenic stroke with patent foramen ovale closure: protocol for the prospective, observational PFO-AF study
Authors: Badoz Marc , Derimay François , Serzian Guillaume , Besutti Matthieu , Rioufol Gilles , Frey Pierre , Guenancia Charles , Ecarnot Fiona , Meneveau Nicolas , Chopard Romain
Published: September 2023

Introduction

After closure of patent foramen ovale (PFO) due to stroke, atrial fibrillation (AF) occurs in up to one in five patients. However, data are sparse regarding the possible pre-existence of AF in these patients prior to PFO closure, and about recurrence of AF in the long term after the procedure. No prospective study to date has investigated these topics in patients with implanted cardiac monitor (ICM). The PFO-AF study (registered with ClinicalTrials.gov under the numberNCT04926142) will investigate the incidence of AF occurring within 2 months after percutaneous closure of PFO in patients with prior stroke. AF will be identified using systematic ICM. Secondary objectives are to assess incidence and burden of AF in the 2 months prior to, and up to 2 years after PFO closure.

Methods and analysis

Prospective, multicentre, observational study including 250 patients with an indication for PFO closure after stroke, as decided by interdisciplinary meetings with cardiologists and neurologists. Patients will undergo implantation of a Reveal Linq device (Medtronic). Percutaneous PFO closure will be performed 2 months after device implantation. Follow-up will include consultation, ECG and reading of ICM data at 2, 12 and 24 months after PFO closure. The primary endpoint is occurrence of AF at 2 months, defined as an episode of AF or atrial tachycardia/flutter lasting at least 30 s, and recorded by the ICM and/or any AF or atrial tachycardia/flutter documented on ECG during the first 2 months of follow-up.

Ethics and dissemination

The study was approved by the Ethics Committee ‘Comité de Protection des Personnes (CPP) Sud-Méditerranéen III’ on 2 June 2021 and registered with ClinicalTrials.gov (NCT04926142). Findings will be presented in national and international congresses and peer-reviewed journals.

Trial registration number

NCT04926142.
Cannabis and cannabinoids in dermatology: protocol for a systematic review and meta-analysis of quantitative outcomes
Authors: Sermsaksasithorn Pim , Nopsopon Tanawin , Samuthpongtorn Chatpol , Chotirosniramit Korn , Pongpirul Krit
Published: September 2023

Introduction

Following the discovery of various effects on skin function by modifying endocannabinoid systems, multiple preclinical studies have revealed the promise of cannabis and cannabinoids in the treatment of a variety of skin diseases. However, its clinical efficacy is still debated.

Methods and analysis

The protocol has been prepared using the Preferred Items for Systematic Review and Meta-analysis Protocols guidelines. A systematic search will be conducted using PubMed, EMBASE, SCOPUS, the Cochrane Central Register of Controlled Trials and Web of Science. We will include randomised controlled trials and observational studies investigating alterations to dermatological characteristics following administration of cannabis and cannabinoids for dermatological diseases and disorders. The two reviewers will perform both the title and abstract and full-text screenings. The Cochrane Risk-of-Bias 2 and ROBINS-1 tools will be used to evaluate the risk of bias. If a group of comparable studies for each quantitative outcome can be discovered, we will conduct a random effects meta-analysis. We will investigate heterogeneity using a combination of visual inspection of the forest plot, the Cochran’s Q test and Higgins’ test [I2]. Sensitivity analyses will be performed to assess the statistical robustness of the primary outcome. To evaluate a publication bias, the Egger’s regression asymmetry test and funnel plots will be considered.

Ethics and dissemination

This study does not require ethical approval because no original data will be collected. The findings will be presented at conferences and published in peer-reviewed journals.

PROSPERO registration number

CRD42023397189.
Identification of spread after deliberate intraneural injection in five mammalian species
Authors: Server Anna , Boezaart Andre P , Perez-Carrasco Marcos , Esteves-Coelho Marielle , Laredo Franciso , Reina Miguel A
Published: September 2023

Introduction

This research endeavors to investigate the phenomenon of intraneural spread across distinct locations: subcircumneurium, extrafascicular intraneural, intrafascicular intraneural, and intraperineurium after deliberate intraneural injections across five mammalian species. The study also aims to propose determinants influencing this spread. Furthermore, the investigation strives to ascertain the optimal animal species and needle configuration for extrapolating intraneural injection outcomes to human contexts.

Methods

This study examined 60 sciatic nerves from 30 fresh and untreated cadavers of rats, rabbits, dogs, pigs, and sheep. The specimens were organized into five groups, each comprising an equal number of nerves. Histological assessments were performed on 30 nerves, involving fascicle metrics. The remaining 30 nerves underwent intentional intraneural injections, facilitated by 19G and 23G needles under ultrasound and direct visualization guidance.

Heparinized erythrocytes combined with a methylene blue solution were used as a marker to analyze the extent and patterns of intraneural spread. Needle orifice measurements were obtained, and these data were overlaid onto images of both nerves and needles. This enabled a comparative evaluation of sizes and an assessment of marker diffusion.

Results

The findings indicated that sciatic nerves in rats, rabbits, and dogs were oligofascicular, characterized by larger fascicles, whereas pigs and sheep exhibited polyfascicular nerves comprised of numerous smaller fascicles. Fascicular diameters were variable across species, with dogs presenting the largest measurements. While intraneural spread was observed and documented, intrafascicular marker spreading was rare, occurring only in one rabbit specimen. Needle orifice attributes were scrutinized and visually depicted.

Conclusions

Despite the formidable challenges associated with the practical realization of intrafascicular injection, the utilization of animal models possessing monofascicular or oligofascicular nerves, such as rats, rabbits, and dogs, in conjunction with needles featuring aperture dimensions surpassing those of the fascicles, likely contributes to the compromised reliability of investigations into intraneural injection outcomes.
A review of regularization strategies and solution techniques for ill-posed inverse problems, with application to inverse heat transfer problems
Authors: Singhal Meenal , Goyal Kavita , Singla Rohit K.
Published: September 2023

With the presence of a large number of inversion algorithms for inverse heat transfer problems (IHTPs) and non-IHTPs, a need for review to have a holistic view is seen. An exhaustive literature review, with the motivation of selecting the inversion technique best fit for a given problem, was made for a general inverse problem. For ill-posedness, a classification of available regularization algorithms namely Tikhonov’s regularization, Bayesian regularization, mollification method, Beck’s sequential approach and Alifanov’s iterative approach, has been provided. Inversion methods like singular value decomposition, truncated singular value decomposition, Tikhonov regularization and total variation regularization are explained. Optimization methods namely steepest descent method, conjugate gradient method, Newton method, Levenberg–Marquardt method, Lagrange method, adjoint method, function specification method, genetic algorithm, differential evolution and particle swarm optimization (PSO) are reviewed. Further, a technique based on neural networks is studied, and wavelet methods like shrinking and wavelet vaguelette decomposition are reviewed. Associated literature has also been listed, highlighting the gaps. The usability of various algorithms in IHTP, starting from the golden section search method, for retrieval of a single parameter, to the regularized versions of the inversion technique, for retrieval of multiple parameters with uncertainty, demonstrates real-life applications to fins in IHTP. An inversion algorithm capable to handle every kind of nonlinearity is sought in literature, whose absence raises the research question, “Is there a technique that works globally for every inverse problem?”, is asked prior to, “What if the available techniques were not utilized to an extent that they should?” is posed. In lieu of this gap, a general comparative framework is developed, such that an efficient technique is selected, based on the total minimum error, which can be used in any field of interest.
Semi-invariant distribution vectors for p-adic unipotent groups
Authors: Maaref Souha
Published: September 2023

Let G be a unipotent algebraic group defined over a [Formula: see text]-adic field of characteristic zero. We denote by [Formula: see text] the set of rational points of G. It is a [Formula: see text]-adic Lie group with Lie algebra denoted by [Formula: see text]. Let [Formula: see text] be an irreducible unitary representation of [Formula: see text] in a Hilbert space [Formula: see text], [Formula: see text] be a linear form on [Formula: see text] and [Formula: see text] be a polarization at [Formula: see text]. We denote by [Formula: see text] a character of [Formula: see text] related to [Formula: see text]. The aim of this study is to give a precise description of the space of semi-invariant distribution vectors [Formula: see text] of [Formula: see text].
THE IMPACT OF R&D ON THE SINGAPOREAN ECONOMY OVER 1978–2019
Authors: WONG POH-KAM , HO YUEN-PING , SINGH ANNETTE
Published: September 2023

There has been a pronounced increase in research and development (R&D) expenditure in Singapore since the late 1990s, with government spending accounting for a sizeable share. This increase has been spurred by increasing public policy emphasis on research and innovation as engines of economic growth. Building upon earlier work ( Ho et al. , 2009 ; Ho and Wong , 2017 ), this paper provides an updated analysis of the impact of R&D on the economic performance of Singapore over four decades from 1978 to 2019 through the use of time series analysis. The Cobb–Douglas production function-based analysis shows a long-run equilibrium relationship between total factor productivity (TFP) and R&D investments. We found that in both long- and short-run productivity of R&D, Singapore tends to lag behind the Organization for Economic Cooperation and Development (OECD) nations. This suggests leakage of value capture and low absorptive capacity of local firms. Possibility of R&D productivity improvements induced by major policy changes over the last two decades was examined, but no evidence of significant structural breaks was found. Lastly, Granger causality analysis reveals that public sector R&D augments private sector R&D capital, thus playing an important role in generating externalities and spillover effects. Policy implications of our findings for Singapore are discussed.
Tri-scalar CFT and holographic bi-fishchain model
Authors: Huang Wung-Hong
Published: September 2023

Bi-scalar CFT from [Formula: see text] deformed [Formula: see text] SYM describes the fishnet theory which is integrable in the planar limit. The holographic dual of the planar model is the fishchain model. The derivation of the weak–strong duality from the first principle was presented in a recent paper (“The Holographic Fishchain” arXiv:1903.10508). In this paper, we extend the investigation to the tri-scalar CFT which arises from the large twist limit of ABJM theory. We show that it becomes tri-scalar fishnet theory in planar limit and the dual theory is the holographic bi-fishchain model.
A New Approach to Detect Power Quality Disturbances in Smart Cities Using Scaling-Based Chirplet Transform with Strategically Placed Smart Meters
Authors: Sinha Pampa , Paul Kaushik , Deb Sanchari , Vidyarthi Ankit , Kilak Abhishek Singh , Gupta Deepak
Published: September 2023

The growth of Internet of Things (IoT)-enabled devices has increased the amount of data created by the distribution network’s periphery nodes, requiring more data transfer capacity. Recent applications’ real-time requirements have strained standard computing paradigms, and data processing has struggled to keep up. Edge computing is employed in this research to detect distribution network faults, allowing for instant sensing and real-time reaction to the control room for faster investigation of distribution problems and power outages, making the system more reliable. Moreover, to overcome the challenges of fault detection, advanced signal processing methods need to be integrated with the Adaboost classifier. An Adaboost-based edge device, suitable for installation on top of a power pole, is proposed in this research as a means of real-time fault detection. To increase throughput, decrease latency and offload network traffic, data collecting, feature extraction and Adaboost-based problem identification are all performed in an integrated edge node. Enhanced detection accuracy (98.67%) and decreased latency (115.2 ms) verify the effectiveness of the suggested approach. In this research, we enhance the classical chirplets transform to create the scaling-basis chirplet transform (SBCT) for time–frequency (TF) analysis. This approach modulates the TF basis around the relevant time function to modify the chirp rate with frequency and time. By carefully selecting the sampling frequency, it is possible to discriminate between short circuit fault and high-impedance fault (HIF) by calculating spectral entropy. The TF representation obtained with the SBCT provides considerably higher energy concentrations, even for signals with numerous components, closely spaced frequencies and heavy background noise.
Reduced Lagrange multiplier approach for non-matching coupling of mixed-dimensional domains
Authors: Heltai Luca , Zunino Paolo
Published: September 2023

Many physical problems involving heterogeneous spatial scales, such as the flow through fractured porous media, the study of fiber-reinforced materials, or the modeling of the small circulation in living tissues — just to mention a few examples — can be described as coupled partial differential equations defined in domains of heterogeneous dimensions that are embedded into each other. This formulation is a consequence of geometric model reduction techniques that transform the original problems defined in complex three-dimensional domains into more tractable ones. The definition and the approximation of coupling operators suitable for this class of problems is still a challenge. We develop a general mathematical framework for the analysis and the approximation of partial differential equations coupled by non-matching constraints across different dimensions, focusing on their enforcement using Lagrange multipliers. In this context, we address in abstract and general terms the well-posedness, stability, and robustness of the problem with respect to the smallest characteristic length of the embedded domain. We also address the numerical approximation of the problem and we discuss the infsup stability of the proposed numerical scheme for some representative configuration of the embedded domain. The main message of this work is twofold: from the standpoint of the theory of mixed-dimensional problems, we provide general and abstract mathematical tools to formulate coupled problems across dimensions. From the practical standpoint of the numerical approximation, we show the interplay between the mesh characteristic size, the dimension of the Lagrange multiplier space, and the size of the inclusion in representative configurations interesting for applications. The latter analysis is complemented with illustrative numerical examples.
The computational complexity of classical knot recognition
Authors: Ichihara Kazuhiro , Nishimura Yuya , Tani Seiichi
Published: September 2023

The classical knot recognition problem is the problem of determining whether the virtual knot represented by a given diagram is classical. We prove that this problem is in NP, and we give an exponential time algorithm for the problem.
NOVEL TRAVELING-WAVE SOLUTIONS OF SPATIAL-TEMPORAL FRACTIONAL MODEL OF DYNAMICAL BENJAMIN–BONA–MAHONY SYSTEM
Authors: AL-SMADI MOHAMMED , AL-OMARI SHRIDEH , ALHAZMI SHARIFAH , KARACA YELIZ , MOMANI SHAHER
Published: September 2023

This paper investigates the dynamics of exact traveling-wave solutions for nonlinear spatial and temporal fractional partial differential equations with conformable order derivatives arising in nonlinear propagation waves of small amplitude including nonlinear fractional modified Benjamin–Bona–Mahony equation, fractional Zakharov–Kuznetsov–Benjamin–Bona–Mahony equation and fractional (2+1)-dimensional Kadomtsev–Petviashvili–Benjamin–Bona–Mahony equation as well. By utilizing the Sine-Gordon expansion method (SGEM), new real- and complex-valued exact traveling-wave solutions are reported by preferring suitable values of physical free parameters. The nonlinear governing equations are reduced into auxiliary nonlinear ordinary differential equations with aid of fractional traveling-wave transformation, in which the fractional derivative is evaluated in a conformable sense. The productivity process of the proposed method for predicting the desirable solutions is also provided. Some of the obtained solutions are simulated graphically in 3D and contour plots. Meanwhile, the effects of the fractional parameter [Formula: see text] in the space and the time direction are illustrated in 2D plots to ensure the novelty, applicability and credibility of the SGEM. These results reveal that the suggested method is general and adequate for dealing with nonlinear models featuring fractional derivatives and can be employed to analyze wide classes of complex phenomena of partial differential equations occurring in engineering and nonlinear dynamics.
INVESTIGATION OF A NONLINEAR MULTI-TERM IMPULSIVE ANTI-PERIODIC BOUNDARY VALUE PROBLEM OF FRACTIONAL q-INTEGRO-DIFFERENCE EQUATIONS
Authors: ALSAEDI AHMED , AL-HUTAMI HANA , AHMAD BASHIR
Published: September 2023

In this paper, we introduce and investigate a new class of nonlinear multi-term impulsive anti-periodic boundary value problems involving Caputo type fractional [Formula: see text]-derivative operators of different orders and the Riemann–Liouville fractional [Formula: see text]-integral operator. The uniqueness of solutions to the given problem is proved with the aid of Banach’s fixed point theorem. Applying a Shaefer-like fixed point theorem, we also obtain an existence result for the problem at hand. Examples are constructed for illustrating the obtained results. The paper concludes with certain interesting observations concerning the reduction of the results proven in the paper to some new results under an appropriate choice of the parameters involved in the governing equation.
COMPLEX MATHEMATICAL MODELING FOR ADVANCED FRACTAL–FRACTIONAL DIFFERENTIAL OPERATORS WITHIN SYMMETRY
Authors: IBRAHIM RABHA W. , OBAIYS SUZAN J. , KARACA YELIZ , SECER AYDIN
Published: September 2023

Non-local operators of differentiation are bestowed with capabilities of encompassing complex natural into mathematical equations. Symmetry as invariance under a specified group of transformations can allow for the concept to be applied extensively not only to spatial figures but also to abstract objects like mathematical expressions which can be said to be expressions of physical relevance, in particular dynamical equations. Derived from this point of view, it can be noted that the more complex physical problems are, the more complex mathematical operators of differentiation are required. Accordingly, the fractal–fractional operators (FFOs) are expanded into the complex plane in our research which revolves around a unique class of normalized analytic functions in the open unit disk. To bring FFOs (differential and integral) into the normalized class, the study aims to expand and modify them along with the investigation of the FFOs geometrically. The qualities of convexity and starlikeness are implicated in this study where the differential subordination technique serves as the foundation for the inquiry under consideration. Furthermore, a collection of differential FFO inequalities is taken into account, demonstrating that the normalized Fox–Wright function can contain all FFOs. Besides these steps, the concept of Grunsky factors is applied to investigate symmetry, while boundary value issues involving FFOs are probed. Consequently, the related properties and applications can be further developed, which requires the devotion to differential fractional problems and diverse complex problems in relation to viable applications, pointing out the room to modify and upgrade the existing methods for more optimal outcomes in challenging real-world problems.
NEW INEQUALITIES OF HERMITE–HADAMARD TYPE FOR n-POLYNOMIAL s-TYPE CONVEX STOCHASTIC PROCESSES
Authors: KALSOOM HUMAIRA , KHAN ZAREEN A.
Published: September 2023

The purpose of this paper is to introduce a more generalized class of convex stochastic processes and explore some of their algebraic properties. This new class of stochastic processes is called the [Formula: see text]-polynomial [Formula: see text]-type convex stochastic process. We demonstrate that this new class of stochastic processes leads to the discovery of novel Hermite–Hadamard type inequalities. These inequalities provide upper bounds on the integral of a convex function over an interval in terms of the moments of the stochastic process and the convexity parameter [Formula: see text]. To compare the effectiveness of the newly discovered Hermite–Hadamard type inequalities, we also consider other commonly used integral inequalities, such as Hölder, Hölder–Ïşcan, and power-mean, as well as improved power-mean integral inequalities. We show that the Hölder–Ïşcan and improved power-mean integral inequalities provide a better approach for the [Formula: see text]-polynomial [Formula: see text]-type convex stochastic process than the other integral inequalities. Finally, we provide some applications of the Hermite–Hadamard type inequalities to special means of real numbers. Our findings provide a useful tool for the analysis of stochastic processes in various fields, including finance, economics, and engineering.
SOME NEW INEQUALITIES FOR n-POLYNOMIAL s-TYPE CONVEXITY PERTAINING TO INTER-VALUED FUNCTIONS GOVERNED BY FRACTIONAL CALCULUS
Authors: KHAN ZAREEN A. , KALSOOM HUMAIRA
Published: September 2023

The main goals of this paper are to provide an introduction to the idea of interval-valued [Formula: see text]-polynomial [Formula: see text]-type convex functions and to investigate the algebraic properties of this type of function. This new generalization aims to show the existence of new Hermite–Hadamard inequalities for the recently presented class of interval-valued [Formula: see text]-polynomials of [Formula: see text]-type convex describing the [Formula: see text]-fractional integral operator. In the classical sense, some special cases are figured out, and the two examples are also given. There are some recently discovered inequalities for interval-valued functions that are regulated by fractional calculus applicable to interval-valued [Formula: see text]-polynomial [Formula: see text]-type convexity. The results obtained show that future research will be simple to implement, highly efficient, feasible, and extremely precise in its investigation. It could also help solve modeling problems, optimization problems, and fuzzy interval-valued functions that involve both discrete and continuous variables.
NEW PROMISING AND CHALLENGES OF THE FRACTIONAL CALOGERO–BOGOYAVLENSKII–SCHIFF EQUATION
Authors: WANG KANG-LE
Published: September 2023

The Calogero–Bogoyavlenskii–Schiff equation is an important nonlinear evolution model to describe the propagation of Riemann waves. A fractional Calogero–Bogoyavlenskii–Schiff is described based on the conformable derivative for the first time. Some new soliton solutions are acquired with the aid of the extended fractional [Formula: see text] function method and fractional variable method. The two novel mathematical methods are very efficient and concise, which can also be utilized to solve other fractional evolution equations. Furthermore, these derived soliton solutions are illustrated by some 3D and 2D graphs with different fractal parameters and fractal dimensions, which might be helpful to study in plasma physics.
ZAGREB ECCENTRICITY INDEX OF LEVEL-n SIERPINSKI GASKET
Authors: MA WENJIA , CUI KEQIN , XI LIFENG
Published: September 2023

In this paper, we investigate the Zagreb eccentricity index of the level-[Formula: see text] Sierpinski gasket [Formula: see text]. Based on the self-similarity and finite pattern, we compute the Zagreb eccentricity index of [Formula: see text] which is the integral of square of eccentricity in terms of the self-similar singular measure.
NEW ANALYSIS METHODS FOR THE COUPLED FRACTIONAL NONLINEAR HIROTA EQUATION
Authors: WANG KANG-LE
Published: September 2023

In this work, the coupled fractional nonlinear Hirota equation is defined by using a powerful fractional derivative sense, which is M-truncate derivative. We explore the fractional functional method and fractional simple equation method to investigate the structure of the solutions of the coupled fractional nonlinear Hirota equations, and some new periodic solutions and solitary wave solutions are successfully acquired. The two proposed approaches are simple, effective and direct. Moreover, some 3D and 2D graphs are sketched to elaborate the behavior of these solutions. These obtained solitary wave and periodic solutions are helpful to improve the understanding of the physical behavior of the corresponding mathematical model.
ELECTROMAGNETIC PROPERTIES, FORMING LIMIT DIAGRAMS AND FRACTURE TOUGHNESS OF LAMINATED AL/FE2O3 COMPOSITES
Authors: KHAYOON ALDRIASAWI SALMAN , AMEEN NIHAYAT HUSSEIN , PITHODE KAMYA , MCMAHON STACY
Published: September 2023

In this study, electrophysical, electromagnetic and mechanical properties, fracture toughness and forming limit diagram (FLD) of Al base composite samples have been studied experimentally. All samples have been fabricated via accumulative roll bonding (ARB) process. To this purpose, AA1060/ Fe2O3 composite strips with thickness of 1 mm have been fabricated with up to eight ARB passes at [Formula: see text]C. In this study, magnetic Al/Fe2O3 composites reinforced with 0, 5% and 10 wt.% of Fe2O3 particles have been manufactured via ARB. The microstructure was studied by optical microscopy (OM). Also, by decreasing the thickness of layers at higher number of passes (increasing the plastic strain), the bonding quality among the layers was improved. Scanning electron microscopy (SEM) fracture surface morphology of samples after the tensile test showed that by increasing the passes, the fracture style (mode) converted to shear ductile at higher ARB passes. So, deep dimples shrink slowly and their number and depth decreased relative to the annealed sample. As the criterion of formability, the area under the FLDs dropped sharply after the first pass and then improved by increasing the passes. Results of fracture test have shown that the value of fracture toughness has been enhanced continually to the maximum value of 34.3 MPam[Formula: see text] at the 8th pass.
Nonlinear Phase Angle and Amplitude Analysis of Porous Functionally Graded Material Rotating Shaft Under Electromagnetic Loads
Authors: Eftekhari Malihe , Eftekhari Mojtaba , Hosseini Mohammad
Published: September 2023

In this research, the nonlinear response including amplitude and phase angle of a functionally graded inextensional rotating shaft is studied under the electromagnetic load. Three types of porosity distributions through the radial direction are considered in this work. For the rotating shaft with nonlinear curvature and inertia, the governing equations and corresponding boundary conditions are derived. The Galerkin and the multiple scales methods are used to obtain the modulation equations. The effect of the power law index for a functionally graded shaft fabricated from the mixture of ceramic and metal is presented in the frequency response diagrams for primary resonance under electromagnetic force. Numerical simulations include the effects of the power law index of functionally graded material (FGM), porosity distribution, air-gap length, electromagnetic load, and vibration modes of a rotor on the phase angle and amplitude of steady state responses.
Continuity filters and modules of quotients
Authors: Fernández-Alonso Rogelio , Cruz-González Juan C.
Published: September 2023

We introduce continuity filters as a generalization of Gabriel filters, still with the possibility of defining modules of quotients, which we present and give some properties about them. We describe continuity filters on principal ideal domains, and finite products of rings. We also study continuity filters with a least element.
Gabor products and a phase space approach to nonlinear analysis
Authors: Dias Nuno Costa , Prata João Nuno , Teofanov Nenad
Published: September 2023

We introduce and study continuity properties of the Gabor product [Formula: see text] and relate it to the well-known product formula for the short-time Fourier transform (STFT). We derive a phase space representation of the cubic nonlinear Schrödinger equation in terms of the Gabor product, and discuss how the Gabor product can be used in the study of nonlinear dynamics of mixed quantum states.
Effective face recognition with hybrid distance-key frame selection using TBO-ensemble model
Authors: Musale Jitendra Chandrakant , Singh Anujkumar , Shirke Swati
Published: September 2023

The enormous amount of data contained in the video image has grown rapidly along with surveillance, greatly outpacing the capacity of human resources to handle it effectively. Smart surveillance retrieval is an essential component of any modern video surveillance system, considerably boosting the effectiveness, precision, and interoperability of the system. The use of face recognition and other cutting-edge technology in the security surveillance system is rapidly rising. Therefore, in this article, the distributed deep convolutional neural network (DCNN) and distributed deep BiLSTM is proposed to efficiently detect the face from the video. One of the major contributions involved in this research relies on the key frame selection, where four unique distance measurement techniques are fused, and is named hybrid distance- key frame selection. The Tri birds optimization (TBO) technique selects the best solution from a large number of solutions for the ensemble model classifier engaged in face recognition. The ensemble model classifier incorporates various hyper-parameters that are optimally trained. Multiple test videos with 401 and 802 test videos are used as the input for the TBO-ensemble model that attains 97% accuracy, 98.33% precision, recall, and f-measure for epoch 50 and the 500 number of retrievals, respectively.
Now is the Time: The Impact of Linguistic Time Reference on Corporate Default Risk
Authors: Ho Kung-Cheng , Chen Yiling , Ye Dezhu , Yan Cheng
Published: September 2023

Synopsis

The research problem

This paper assesses whether and how people’s perceptions of time — strong future time reference (FTR) versus weak FTR — affect corporate default risk.

Motivation or theoretical reasoning

Studies have shown that default risk varies across firms, regions, and countries, highlighting the need for a comprehensive understanding of the contributing factors. Traditional studies focus on how firm-level, industry-level, national and international economic and financial variables shape corporate default risk, but they fail to explain cross-country and cross-regional differences in corporate default risk from the perspective of informal institutions, particularly, language. This study takes the first step to examine whether and how future-oriented language shapes corporate default risk.

The test hypotheses

We first tested whether strong-FTR language decreases corporate default risk. We further tested whether the effect of strong-FTR language on default risk depends on firms’ level of information transparency. In addition, we tested whether the effect of strong-FTR language on default risk depends on a country’s disclosure requirements. Lastly, we tested whether the effect of strong-FTR language on default risk depends on a country’s control of corruption.

Target population

We find that corporate default risk is significantly higher in regions dominated by speakers of weak-FTR languages, using a comprehensive sample of firms in 36 countries with 180,013 observations spanning from 1988 to 2017.

Adopted methodology

Ordinary least square regressions were used in this study.

Analyses

Corporate default risk is measured by two proxies of firm probability of default, following Merton [(1974) Journal of Finance, 29(2), 449–470] and Lee and Lin [(2012) Journal of International Financial Markets, Institutions, and Money, 22(4), 973–989]. Our independent variable is Strong FTR, which equals 1 if a language belongs to the strong-FTR language family, as defined by the European Science Foundation’s Typology of Languages in Europe (EUROTYP) project. If a language does not require “obligatory [FTR] use in (main clause) prediction-based contexts” [Dahl (2000)Tense and Aspect in the Languages of Europe, O. Dahl (Ed.), pp. 309–328], then we put this language into the weak-FTR group. On the other hand, if a language does have the above-mentioned requirement, then it belongs to the strong-FTR group.

Findings

We found that corporate default risk is significantly higher in regions dominated by speakers of weak-FTR languages. Furthermore, the FTR effect on default risk is weakened in countries with stronger formal institutions (e.g., high disclosure quality, greater transparency, and less corruption). Our results introduce a new explanation for heterogeneity in corporate default risk, provide insights about whether language is an economic institution, and adds to research on the effects of languages on economic and financial outcomes.
Synthesis and Characterization of CdO/CdS Nanocomposite for the Degradation of Methyl Orange Dye
Authors: Singh Ganesh , Manish
Published: September 2023

CdO/CdS nanocomposites have been synthesized via the solution combustion route. These nanocomposites have been characterized in terms of XRD, FESEM, EDS, UV-visible and FTIR spectroscopy. The crystallinity and the crystallite size of the as-synthesized CdO/CdS nanocomposites were calculated from XRD, whereas the surface morphology and chemical purity were obtained from FESEM and EDS analysis. Further, all the samples were used as photocatalyst for the degradation of methyl orange (MO) dye under UV-Visible irradiation. The rate constant, [Formula: see text], was obtained by the Langmuir–Hinshelwood model. From [Formula: see text] values, it can be observed that the rate constant increases on increasing the amount of photocatalyst due to an increase in surface area. The rate constant value for CdO/CdS nanocomposite annealed at 615[Formula: see text]C was found to be very low, which may be largely due to loss in crystallinity at this higher temperature. Further, we compared our results with those reported in the literature and it was observed that CdO/CdS nanocomposites act as a better photocatalyst than others.
On the normal complement problem of finite group algebra
Authors: Upadhyay Diksha , Chandra Harish
Published: September 2023

Let [Formula: see text] be a group, [Formula: see text] be a finite field with a positive characteristic [Formula: see text], then [Formula: see text] is the group algebra of a group [Formula: see text] over [Formula: see text] with a positive characteristic [Formula: see text]. In this paper, the normal complement problem on semisimple group algebra [Formula: see text] is examined. The normal complement problem of groups of order up to 16 in their corresponding unit groups [Formula: see text] has already been discussed. We have proved that up to isomorphism all the three non-abelian groups of order 18 and up to isomorphism all three non-abelian groups of order 20 do not have normal complement in their corresponding unit groups [Formula: see text].
A class of non-limiting factor filling functions for global minimization
Authors: Pandiya Ridwan , Salmah  , Widodo  , Endrayanto Irwan
Published: September 2023

This study aims to provide a non-limiting factor auxiliary function in a general form. This function, under some assumptions, is proven to fulfill the properties of filling functions. The properties of the proposed method, which include continuously differentiable and the absence of any limiting factor, provide an advantage during numerical experiments for solving some global optimization problems. A numerical comparison was performed, and the results confirmed that our filling function has several advantages compared with other filling functions. Moreover, numerical computational results demonstrate the reliability and effectiveness of the proposed filling function.
Generalized entropies of subdivision-corona networks
Authors: Berberler Zeynep Ni̇han
Published: September 2023

The entropy of a graph is an information-theoretic quantity which expresses the complexity of a graph. Entropy functions have been used successfully to capture different aspects of graph complexity. The generalized graph entropies result from applying information measures to a graph using various schemes for defining probability distributions over the elements of the graph. In this paper, we investigate the complexity of a class of composite graphs based on subdivision graphs and corona product evaluating the generalized graph entropies, and we present explicit formulae for the complexity of subdivision-corona type product graphs.
Further results on independent edge-vertex domination
Authors: Chellali Mustapha
Published: September 2023

Given a graph [Formula: see text] with no isolated vertices, let [Formula: see text] [Formula: see text] [Formula: see text] [Formula: see text] [Formula: see text] and [Formula: see text] denote the ev-domination number, the independent ev-domination number, the upper independent ev-domination number, the domination number, the paired-domination number and the upper paired-domination number, respectively. It is known that [Formula: see text] In this paper, we extend this inequality chain to involve the upper paired-domination number for arbitrary graphs [Formula: see text] with no isolated vertices as well as the domination number for trees. Moreover, we show that recognizing well ev-covered graphs (i.e., graphs [Formula: see text] with [Formula: see text]) is co-NP-complete, solving an open problem posed by Boutrig and Chellali.
PACMHCI V7, MHCI, September 2023 Editorial
Authors: Leiva Luis A. , Matera Maristella , Schöning Johannes
Published: September 2023

We have witnessed astonishing progress in mobile and ubiquitous technology in the past two decades. Our interaction-supporting devices have become increasingly capable and diverse, while the supporting infrastructure, including heterogeneous networks and cloud computing, has matured to enable our vision of a ubiquitous computing environment. As we navigate this new frontier, we find ourselves pondering the words of Bill Buxton: "Now that we can do anything, what should we do?" and, more importantly, "How should it work?"

Buxton's thought-provoking statement urges us to shift our focus towards methodological considerations and, crucially, ethics. The MobileHCI community, as a whole, recognizes the importance of ethical practices in shaping our field. While our work has often touched upon privacy-maintaining interactions and service provision, it is time to delve deeper into the ethical dimensions of our research and design choices.
Exploring Digital Communication Needs of Local Communities and Self-organized Collectives
Authors: El-Raheb Katerina , Vlachokyriakos Vasilis , Roussou Maria , Olivier Patrick , Bartindale Tom , Garbett Andrew
Published: September 2023

Recent work in HCI has explored the use of ICTs for the mobilisation and organisation of values-led communities and social movements. This paper extends this line of work by exploring the design of a communication system for informal, place-based citizen collectives-also referred to as Social Solidarity Movements. The distinctive characteristics of such collectives, namely their decentralised, bottom-up and self-organised organisation, and their lack of monetary resources, pose interesting challenges for communication technology design. The work reported in this paper sought to explore how the values and practices of such collectives can be embodied in mobile communication tools. A system was designed to mirror on-the-ground informal organisational structures, its primary goal being to serve as a probe for research and discussion. Our findings highlight the diversity of channels and organisational structures prevailing in these contexts, their participatory nature, and issues of temporality, anonymity, privacy, and trust, all of which must be considered when designing technologies to support cooperative work. We contribute methodological insights and design implications for mobile technologies underpinning the work of social collectives and their practices.
NaCanva: Exploring and Enabling the Nature-Inspired Creativity for Children
Authors: Yan Zihan , Wu Yanhong , Luo Danli , Zhang Chao , Jin Qihang , Chen Wei , Wu Yingcai , Chen Xiang 'Anthony' , Wang Guanyun , Mi Haipeng
Published: September 2023

Nature has been a plentiful source of materials, replenishment, inspiration, and creativity. Nature collage, as a crafting technique, is a fun and educational activity for children to explore nature and engage their creativity. However, the raw material collection is limited to static things such as leaves, ignoring inspiration from nature sounds and dynamic elements such as babbling creeks. Using a mobile application, we hope to encourage children's creativity by renewing collage materials collection and careful observation in nature. To explore this, we conducted a formative study with children (N=20) and a design workshop with experts (N=6) to formulate NaCanva, an AI-assisted multi-modal collage creation system for children. Drawing on the interactivity between children and nature, NaCanva enables the multi-modal material collection, including images, sound, and videos, which differs our system from traditional collages. We validated this system with a between-subject user study (N=30), and the results suggested that NaCanva unleashes children's creativity in nature collage creation by enhancing children's multidimensional observation and engagement in nature.