bluuebunny/crossref_metadata_2025 huggingface dataset:
Percepções de estudantes de Biblioteconomia quanto ao papel da pessoa bibliotecária no enfrentamento da desinformação
Authors: Furtado Camila
Published: July 2023

O objetivo desta pesquisa é explicitar as possibilidades de combate à desinformação por parte dos estudantes do curso de Biblioteconomia da Universidade Federal de Rondônia – UNIR. Visa, especificamente, analisar como eles enxergam esse fenômeno, as competências que desenvolvem no curso e a atuação do bibliotecário na linha de frente desse problema. O procedimento de análise de dados foi realizado a partir de uma entrevista estruturada, feitas com os estudando do curso de diferentes períodos. Os resultados obtidos mostraram que os estudantes entendem a desinformação como a produção de notícias falsas, a falta de cuidado com as fontes e a ausência de informação. Também foi possível perceber que eles possuem uma perspectiva responsável em relação à informação, desenvolvendo competências de checagem de fontes e discernimento para identificar um conteúdo confiável, no entanto, também mostraram que ainda faltam algumas mudanças no PPC do curso para preparar melhor os estudantes para atuar contra a desinformação. Dessa forma, este trabalho visou contribuir para a evolução dessa discussão, para que esse assunto seja continuado e explorado por outros pesquisadores.
Acervo da vergonha: censura e resistência
Authors: Rocha Luiza Alves , Costa Michelli Pereira da
Published: July 2023

Os acervos informacionais têm enfrentado diversos períodos históricos autoritários. A partir de uma abordagem qualitativa, foram realizadas pesquisas documentais e bibliográficas, entre os anos de 2021 e 2022, com o intuito de investigar ações governamentais de censura aos livros durante o Estado Novo (1937-1946), a Ditadura Militar (1964-1985) e o “Brasil Atual” (2016-2022). Em todos os períodos aqui destacados, as ações de censura aos livros foram enfrentadas por atores sociais como bibliotecários, editores, autores e artistas. Considerando a relevância dessas ações para o movimento da histórica, nesta pesquisa buscou-se também evidenciar as ações de resistência a essas políticas. Em relação ao Estado Novo, foram encontradas 6 políticas de censura e 5 ações de enfrentamento. Se tratando da Ditadura Militar, foram apontadas 7 políticas e 4 ações de resistência. Ao se analisar o cenário político social recente, é possível notar que as ações governamentais de censura vêm se agravando. Perseguições explícitas e institucionais às mesmas temáticas e propostas de taxação de livros marcam o presente e nos mostram constantes similaridades com períodos censórios da nossa história. Neste sentido, analisar historicamente os acervos informacionais nos faz perceber que estes vêm resistindo a ações de desmonte desde sua origem e que atores importantes dos sistemas de informação, como bibliotecários, artistas e editores, têm lutado para que estes permaneçam vivos e atuantes a várias décadas. Identificar ações
Determinants of Employee Job Satisfaction: An Empirical Analysis of the Banking Sector in Bangladesh
Authors:   Department of Finance and Banking, Faculty of Business Studies, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh., Begum Humaira , Mehtaj Mouri ,   Department of International Business, University of Dhaka, Bangladesh., Babu Md. Asaduzzaman ,   Department of Marketing, Faculty of Business Studies, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh., Khatun Mst. Shamima ,   Department of Finance and Banking, Faculty of Business Studies, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh.
Published: July 2023

The most hotly contested issues in the field of organizational behavior are around issues of human resource management, organizational management, and employee happiness. This paper uses interviews and surveys of bank workers to identify factors that contribute to job satisfaction. This study aims to measure the impact of job pressure, supervision of management, compensation and benefits, working environment, job security, training, and development on the employee satisfaction of the banking sector and how they affect the overall job satisfaction of bank employees in Bangladesh. Convenience sampling methods were used to collect data from 160 employees from both public and private banks. SPSS 25 version used as statistical tools. The findings of the study reveal that job pressure, supervision of management, job security, training, and development impact overall employee satisfaction. On the other hand, compensation, benefits, and the working environment have no significant impact on the overall job satisfaction of bank employees. For the banking system in Bangladesh to flourish, the relevant authorities must accordingly address these critical elements. The findings of this research can inform policymakers on what influences workers' happiness on the job. When the authority has a firm grasp on what its employees want and need, it can better manage its workforce, boost employee loyalty, and boost customer satisfaction. The study's findings offer draconian recommendations for the financial services industry. This study opens up a new scope for academicians to work on employee job satisfaction in different financial and non-financial sectors; additional research can be done while taking them into account.
Positive solutions for a class of phi-Laplacian differential systems with multiple parameters
Authors: Yu Xiaozhu , Ing Shiwen , Lian Hairong
Published: July 2023

In this article, we consider the double eigenvalue problem for a \(\phi\)-Laplacian differential system. We prove the existence of positive solutions under the \(\phi\)-super-linear condition by means of the Guo-Krasnosel'skii fixed point theorem and the topological degree. It is shown that there exists a continuous curve splitting \(\mathbb{R}_+^2\backslash\{(0,0)\}\) into disjoint subsets such that systems has at least two, at least one, or no positive solutions according to parameters in different subsets.
Mathematical analysis of a Dupuit-Richards model
Authors: Al Nazer Safaa , Rosier Carole , Tsegmid Munkhgerel
Published: July 2023

This article concerns an alternative model to the 3D-Richards equation to describe the flow of water in shallow aquifers. The model couples the two dominant types of flow existing in the aquifer. The first is described by the classic Richards problem in the upper capillary fringe. The second results from Dupuit's approximation after vertical integration of the conservation laws between the bottom of the aquifer and the saturation interface. The final model consists of a strongly coupled system of parabolic-type partial differential equations that are defined in a time-dependent domain. First, we show how taking the low compressibility of the fluid into account eliminates the nonlinearity in the time derivative of the Richards equation. Then, the general framework of parabolic equations is used in non-cylindrical domains to give a global in time existence result to this problem.
Asymptotic behavior of solutions to 3D Kelvin-Voigt-Brinkman-Forchheimer equations with unbounded delays
Authors: Huy Le Thi
Published: July 2023

In this article we consider a 3D Kelvin Voigt Brinkman Forchheimer equations involving unbounded delays in a bounded domain \(\Omega \subset \mathbb{R}^3\). First, we show the existence and uniqueness of weak solutions by using the Galerkin approximations method and the energy method. Second, we prove the existence and uniqueness of stationary solutions by employing the Brouwer fixed point theorem. Finally, we study the stability of stationary solutions via the direct classical approach and the construction of a Lyapunov function. We also give a sufficient condition for the polynomial stability of the stationary solution for a special case of unbounded variable delay.
Existence of global weak solutions for a p-Laplacian inequality with strong issipation in noncylindrical domains
Authors: Ferreira Jorge , Piskin Erhan , Shahrouzi Mohammad , Cordeiro Sebastiao
Published: July 2023

In this work, we obtain global solutions for nonlinear inequalities of p-Laplacian type in noncylindrical domains, for the unilateral problem with strong dissipation $$ u'' -\Delta _pu-\Delta u'-f\geq 0\quad\text{in }Q_0,$$ where \(\Delta _p\) is the nonlinear p-Laplacian operator with \(2\leq p<\infty\), and \(Q_0\) is the noncylindrical domain. Our proof is based on a penalty argument by J. L. Lions and Faedo-Galerkin approximations
Dynamics of a non-autonomous stochastic weakly damped plate model with critical exponent
Authors: Wen Lan , Yang Lu
Published: July 2023

In this article, we study the long-time behavior of the non-autonomous stochastic weakly damped plate model with critical exponent. By decomposing the solutions of the system and estimating the bounds of solutions in a more regular space, we obtain random attractors, when the external term is time-dependent and the nonlinearity has a critical growth.
A nonlinear mathematical model for two-phase flow in nanoporous media
Authors: Melzi Imane , Atik Youcef
Published: July 2023

We propose a mathematical model for the two-phase flow nanoporous media. Unlike classical models, our model suppose that the rock permeability depends on the gradient of pressure. Using usual laws of flows in porous media, we obtain a system of two nonlinear partial differential equations: the first is elliptic and the second is parabolic degenerate. We study a regularized version of our model, obtained by adding a ``vanishing'' term to the coefficient causing the degeneracy. We prove the existence of a weak solution of the regularized model. Our approach consists essentially to use the Rothe's method coupled with Galerkin's method.
k-Hessian curvature type equations in space forms
Authors: Zhou Jundong
Published: July 2023

In this article, we study closed star-shaped (eta, k)-convex hypersurfaces in space forms satisfying a class of k-Hessian curvature type equations. Firstly, using the maximum principle, we obtain a priori estimates for the class of Hessian curvature type equations. Secondly, we obtain an existence result by using standard degree theory based on a priori estimates.
Remarks on periodic Zakharov systems
Authors: Kishimoto Nobu
Published: July 2023

In this article, we consider the Cauchy problem associated with the Zakharov system on the torus. We obtain unconditional uniqueness of solutions in low regularity Sobolev spaces including the energy space in one and two dimensions. We also prove convergence of solutions in the energy space, as the ion sound speed tends to infinity, to the solution of a cubic nonlinear Schrodinger equation, for dimensions one and two. Our proof of unconditional uniqueness is based on the method of infinite iteration of the normal form reduction; actually, we simply show a certain set of multilinear estimates, which was proposed as a criterion for unconditional uniqueness in [13]. The convergence result is obtained by a similar argument to the non-periodic case [13], which uses conservation laws and unconditional uniqueness for the limit equation.
Open mappings: The case for a new direction in fixed point theory
Authors: Burton Theodore A. , Purnara Ioannis K.
Published: July 2023

Classical fixed point theorems often begin with the assumption that we have a mapping P of a closed convex set in a Banach space G into itself. It then adds a number of conditions which will ensure that there is at least one fixed point in the set G. We continue two earlier studies in which we now propose to stop the process after we have mapped G not only into itself, but into its interior. We then study what we may deduce from this alone.
Multiple solutions for p(x)-Kirchhoff type problems with Robin boundary conditions
Authors: Afrouzi Ghasem A. , Chung Nguyen Thanh , Naghizadeh Zohreh
Published: July 2023

This article considers p(x)-Kirchhoff type problems with Robin boundary conditions. Using the mountain pass theorem, the Ekeland's variational principle, and Krasnoselskii's genus theory, we prove that the problem has at least two nontrivial weak solutions or infinitely many nontrivial weak solutions under some suitable conditions on the nonlinearities. The main results improve and generalize the previous ones introduced in [2,7].
Second order Sobolev regularity for p-harmonic functions in SU(3)
Authors: Yu Chengwei
Published: July 2023

Let u be a weak solution to the degenerate subelliptic p-Laplacian equation $$ \Delta_{\mathcal{H},p}u(x)=\sum_{i=1}^6 X_i(|\nabla_{\mathcal{H}}u |^{p-2}X_iu)=0, $$ where \(\mathcal{H}\) is the orthogonal complement of a Cartan subalgebra in SU(3) and its orthonormal basis is composed of the vector fields \(X_1,\ldots, X_6\). We prove that when \(1<p<7/2\), the solution u has the second order horizontal Sobolev\(W^{2,2}_{\mathcal{H},\rm loc}\)-regularity.
Exponential stability of a damped beam-string-beam transmission problem
Authors: Barraza Martinez Bienvenido , Hernandez Monzon Jairo , Vergara Rolong Gustavo
Published: July 2023

We consider a beam-string-beam transmission problem, where two structurally damped or undamped beams are coupled with a frictionally damped string by transmission conditions. We show that for this structure, the dissipation produced by the frictional part is strong enough to produce exponential decay of the solution no matter how small is its size. For the exponential stability in the damped-damped-damped situation we use energy method. For the undamped-damped-undamped situationwe use a frequency domain method from semigroups theory, which combines a contradiction argument with the multiplier technique to carry out a special analysis for the resolvent. Additionally, we show that the solution first defined by the weak formulation has higher Sobolev space regularity.
Dynamics of stochastic Lotka-Volterra predator-prey models driven by three independent Brownian motions
Authors: Li Shangzhi , Guo Shangjiang
Published: July 2023

This article concerns the permanence and extinction of stochastic Lotka-Volterra predator-prey models perturbed by three independent white noises. We establish some criteria and present some numerical simulations that illustrate our theoretical results. It is shown that the presence of strong noise on either the intra-specific interaction rate or the inter-specific interaction rate may lead to complete different dynamical behaviors from the deterministic case.
Existence of solution to critical Kirchhoff-type equation with dipole-type potential
Authors: Wang Sainan , Su Yu
Published: July 2023

Dipole-type potential arises in the area of nonrelativistic molecular physics. In this paper, we establish the existence and nonexistence of solution to critical Kirchhoff-type equation with dipole-type potential.
Weak solution by the sub-supersolution method for a nonlocal system involving Lebesgue generalized spaces
Authors: Razani Abdolrahman , Figueiredo Giovany M.
Published: July 2023

We consider a system of nonlocal elliptic equations $$ \displaylines{ - \mathcal{A}(x, |v|_{L^{r_1(x)}}) \hbox{div}(a_1(|\nabla u|^{p_1(x)})|\nabla u|^{p_1(x)-2}\nabla u)\cr = f_1(x, u,v) |\nabla v|^{\alpha_1(x)}_{L^{q_1(x)}}+g_1(x, u,v) |\nabla v|^{\gamma_1(x)}_{L^{s_1(x)}},\cr - \mathcal{A}(x, |u|_{L^{r_2(x)}}) \hbox{div}(a_2(|\nabla v|^{p_2(x)})|\nabla u|^{p_2(x)-2}\nabla u)\cr = f_2(x, u,v) |\nabla u|^{\alpha_2(x)}_{L^{q_2(x)}}+g_2(x, u,v)|\nabla u|^{\gamma_2(x)}_{L^{s_2(x)}}, } $$with Dirichlet boundary condition, where \(\Omega\) is a bounded domain in\()\mathbb{R}^N\) \((N >1)\) with \(C^2\) boundary. Using sub-supersolution method,we prove the existence of at least one positive weak solution.Also, we study a generalized logistic equation and a sublinear system.
Global solutions and blow-up for a Kirchhoff-type problem on a geodesic ball of the Poincare ball model
Authors: Ding Hang , Zhou Jun
Published: July 2023

This article concerns a Kirchhoff-type parabolic problem on a geodesic ball of hyperbolic space. Firstly, we obtain conditions for finite time blow-up, and for the existence of global solutions for \(J(u_0)\leq d\), where \(J(u_0)\) denotes the initial energy and d denotes the depth of the potential well. Secondly, we estimate the upper and lower bounds of the blow-up time. In addition, we derive the growth rate of the blow-up solution and the decay rate of the global solution. Thirdly, we establish a new finite time blow-up condition which is independent of d and prove that the solution can blow up in finite time with arbitrary high initial energy, by using this blow-up condition. Finally, we present some equivalent conditions for the solution existing globally or blowing up in finite time.
Resolvent kernel on H-type groups and a Green kernel for fractional powers of its sub-Laplacian
Authors: Mouhcine Zakariyae
Published: July 2023

In this article, we give an integral representation of the resolvent kernel on H-type groups, then we derive an integral representation of Kaplan's fundamental solution on this groups. Also we obtain the Green kernel for fractional powers of its sub-Laplacian.
Existence of solutions for a problem with multiple singular weighted p-Laplacians and vanishing potentials
Authors: Alves Maria Jose , Assuncao Ronaldo B.
Published: July 2023

This work establishes the existence of positive solutions to a quasilinear singular elliptic equations involving the (p-q)-Laplacian operator with singularities and a vanishing potential. We adapt the penalization method developed by del Pino and Felmer and we consider an auxiliary problem whose corresponding functional satisfies the geometry of the mountain-pass theorem; then, we prove that the Palais-Smale sequences are bounded in a Sobolev space; after that, we show that the auxiliary problem has a solution. Finally, we use the Moser iteration scheme to obtain an appropriate estimate and we conclude that the solution to the auxiliary  problem is also a solution to the original problem.
Cauchy problems for chemotaxis systems with chemo attractant and repellent
Authors: Lagha Aesha , Hattori Hattori
Published: July 2023

We study the existence of global solutions and their asymptotic behavior for a chemotaxis system with chemo-attractant and repellent in three dimensions. To accomplish this, we use the Fourier transform and energy method. First, we establish \(L_q\) time-decay for the linear homogeneous system using Fourier transform and finding Green's matrix. Then, we find \(L_q\) time-decay for the nonlinear system using the Duhamel's principle and the time-weighted estimates.
Stability of bistable traveling wavefronts for a nonlocal dispersal epidemic system
Authors: Hao Yu-Cai , Zhang Guo-Bao
Published: July 2023

This article concerns the stability of traveling wavefronts for a nonlocal dispersal epidemic system. Under a bistable assumption, we first construct a pair of upper-lower solutions and employ the comparison principle to prove that the traveling wavefronts are Lyapunov stable.Then, applying the squeezing technique combining with appropriate upper-lower solutions, we show that the traveling wavefronts are globally exponentially stable. As a corollary, the uniqueness of traveling wavefronts is obtained.
Existence of global solutions and blow-up for p-Laplacian parabolic equations with logarithmic nonlinearity on metric graphs
Authors: Wang Ru , Chang Xiaojun
Published: July 2023

In this article, we study the initial-boundary value problem for a p-Laplacian parabolic equation with logarithmic nonlinearity on compact metric graphs. Firstly, we apply the Galerkin approximation technique to obtain the existence of a unique local solution. Secondly, by using the potential well theory with the Nehari manifold, we establish the existence of global solutions that decay to zero at infinity for all \(p>1\), and solutions that blow up at finite time when \(p>2 \) and at infinity when \(1<p\leq 2\). Furthermore, we obtain decay estimates of the global solutions and lower bound on the blow-up rate.
strange non-local monotone operator arising in the homogenization of a diffusion equation with dynamic nonlinear boundary conditions on particles of critical size and arbitrary shape
Authors: Diaz Jesus Ildefonso , Shaposhnikova Tatiana A. , Zubova Maria N.
Published: July 2023

We characterize the homogenization limit of the solution of a Poisson equation in a bounded domain, either periodically perforated or containing a set of asymmetric periodical small particles and on the boundaries of these particles a nonlinear dynamic boundary condition holds involving a Holder nonlinear \(\sigma(u)\). We consider the case in which the diameter of the perforations (or the diameter of particles) is critical in terms of the period of the structure. As in many other cases concerning critical size, a "strange" nonlinear term arises in the homogenized equation. For this case of asymmetric critical particles we prove that the effective equation is a semilinear elliptic equation in which the time arises as a parameter and the nonlinear expression is given in terms of a nonlocal operator H which is monotone and Lipschitz continuous on \(L^2(0,T)\), independently of the regularity of \(\sigma\).
Oscillation for second order nonlinear differential equations with a sub-linear neutral term
Authors: Wu Yingzhu , Yu Yuanhong , Xiao Jinsen
Published: July 2023

We study the oscillatory behavior of solution to the second order nonlinear differential equations with a sub-linear neutral term $$ \big(a(t)[(x(t)+p(t)x^{\alpha}(\tau(t)))']^{\gamma}\big)'+q(t)x^{\beta}(\sigma(t))=0, \quad t\geq t_0>0. $$ A new criterion is established that improves related results reported in the literature. Moreover, some examples are provided to illustrate the main results.
Periodic solutions of stochastic Volterra equations
Authors: Chen Feng
Published: July 2023

This article concerns the dynamical behavior of solutions to stochastic Volterra equations. We prove the existence of periodic solutions in distribution of stochastic Volterra equations. We use the Banach fixed point theorem and a Krasnoselski-Schaefer type fixed point theorem.
Double phase equations with an indefinite concave term
Authors: Liu Zhenhai , Papageorgiou Nikolaos S.
Published: July 2023

We consider a Dirichlet problem having a double phase differential operator with unbalanced growth and reaction involving the combined effects of a concave (sublinear) and of a convex (superlinear) terms. We allow the coefficient \(\mathcal E\in L^\infty(\Omega)\) of the concave term to be sign changing. We show that when \(\|\mathcal E\|_\infty \) is small the problem has at least two bounded positive solutions.
parabolic bipolynomial fractional Dirichlet-Laplace problem
Authors: Idczak Dariusz
Published: July 2023

We derive existence results for a parabolic bipolynomial abstract and classical problems containing fractional powers of the Dirichlet-Laplace operator on a bounded domain, in the sense of the Stone-von Neumann operator calculus. The main tools are theorems on the existence and uniqueness of a weak solutions to an abstract problem, due to Friedman, and a general theorem on the equivalence of weak and strong solutions to some operator equation.
Stabilization of the critical nonlinear Klein-Gordon equation with variable coefficients on R^3
Authors: Fu Song-Ren , Ning Zhen-Hu
Published: July 2023

We prove the exponential stability of the defocusing critical semilinear wave equation with variable coefficients and locally distributed damping on \(\mathbb{R}^3\). The construction of the variable coefficients is almost equivalent to the geometric control condition. We develop the traditional Morawetz estimates and the compactness-uniqueness arguments for the semilinear wave equation to prove the unique continuation result. The observability inequality and the exponential stability are obtained subsequently.
Solvability of inclusions involving perturbations of positively homogeneous maximal monotone operators
Authors: Adhikari Dhruba R. , Aryal Ashok , Bhatt Ghanshyam , Kunwar Ishwari J. , Puri Rajan , Ranabhat Min
Published: July 2023

Let \(X\) be a real reflexive Banach space and \(X^*\) be its dual space. Let \(G_1\) and \(G_2\) be open subsets of \(X\) such that \(\overline G_2\subset G_1\), \(0\in G_2\), and \(G_1\) is bounded. Let \(L: X\supset D(L)\to X^*\) be a densely defined linear maximal monotone operator, \(A:X\supset D(A)\to 2^{X^*}\) be a maximal monotone and positively homogeneous operator of degree \(\gamma>0\), \(C:X\supset D(C)\to X^*\) be a bounded demicontinuous operator of type \((S_+)\) with respect to \(D(L)\), and \(T:\overline G_1\to 2^{X^*}\) be a compact and upper-semicontinuous operator whose alues are closed and convex sets in \(X^*\). We first take \(L=0\) and establish the existence of nonzero solutions of \(Ax+ Cx+ Tx\ni 0\) in the set \(G_1\setminus G_2\). Secondly, we assume that \(A\) is bounded and establish the existence of nonzero solutions of \(Lx+Ax+Cx\ni 0\) in \(G_1\setminus G_2\). We remove the restrictions \(\gamma\in (0, 1]\) for \(Ax+ Cx+ Tx\ni 0\) and \(\gamma= 1\) for \(Lx+Ax+Cx\ni 0\) from such existing results in the literature. We also present applications to elliptic and parabolic partial differential equations in general divergence form satisfying Dirichlet boundary conditions.
Optimal decay rates for higher-order derivatives of solutions to 3D compressible Navier-Stokes-Poisson equations with external force
Authors: Qin Liuna , Xiao Changguo , Zhang Yinghui
Published: July 2023

We investigate optimal decay rates for higher-order spatial derivatives of solutions to the 3D compressibleNavier-Stokes-Poisson equations with external force. The main novelty of this article is twofold:First, we prove the first and second order spatial derivatives of the solutions converge to zero at the \(L^2\)-rate \((1+t)^{-5/4}\), which is faster than the \(L^2\)-rate \((1+t)^{-3/4}\) in Li-Zhang [15]. Second, for well-chosen initial data, we show the lower optimal decay rates of the first order spatial derivative of the solutions. Therefore, our decay rates are optimal in this sense.
A KAM theorem for higher dimensional reversible nonlinear Schrodinger equations
Authors: Lou Zhaowei , Sun Yingnan
Published: July 2023

In this article we prove an abstract Kolmogorov-Arnold-Moser (KAM) theorem for infinite dimensional reversible systems. Using this theorem, we obtain the existence of quasi-periodic solutions for a class of reversible (non-Hamiltonian) coupled nonlinear Schrodinger systems on a d-torus.
Improved blowup time estimates for fourth-order damped wave equations with strain term and arbitrary positive initial energy
Authors: Chen Shaohua , Xu Runzhang , Yang Chao
Published: July 2023

We propose a new differential inequality that improve the upper bound of the blowup time estimate for nonlinear fourth-order damped wave equations with strain term and arbitrary positive initial energy. We also give two new initial conditions to expand the range of the initial data leading to the finite time blowup of  solutions. We obtain a sharp result of finite time blowup for the special case of the new differential inequality.We illustrate our results with some simulations.
Integrable nonlinear perturbed hierarchies of NLS-mKdV equation and soliton solutions
Authors: Zhao Qiulan , Cheng Hongbiao , Li Xinyue , Li Chuanzhong
Published: July 2023

We propose three spectral problems for NLS-mKdV equation by combining three integrable coupling ways. Then we obtain three nonlinear perturbation terms to derive three integrable nonlinear perturbed hierarchies of the NLS-mKdV equation. We proved the Lax integrability of the integrable nonlinear perturbed hierarchies. On the basis of a special orthogonal group, we prove the Liouville integrability of a third-order integrable nonlinear perturbed hierarchy of NLS-mKdV equation by deriving its bi-Hamiltonian structures. We build three Darboux matrices for constructing the Darboux transformations of the first two equations. As applications of the Darboux transformation, we present explicit solutions of these equations, three-dimensional plots,  and density profiles the evolution of solitary waves.
Two solutions for nonhomogeneous Klein-Gordon equations coupled with Born-Infeld type equations
Authors: Wang Lixia , Xiong Chunlian , Zhao Pingping
Published: July 2023

This article concerns the nonhomogeneous Klein-Gordon equation coupled with a Born-Infeld type equation,$$\displaylines{- \Delta u +V(x)u-(2\omega+\phi)\phi u =f(x,u)+h(x), \quad x\in \mathbb{R}^3,\cr \Delta \phi+\beta\Delta_4\phi=4\pi(\omega+\phi)u^2, \quad x\in \mathbb{R}^3, }$$ where \(\omega\)  is a positive constant. We obtain the existence of two solutions using the Mountain Pass Theorem, and the Ekeland's variational principle in critical point theory.
Positive solutions for Kirchhoff-Schrodinger equations via Pohozaev manifold
Authors: Hu Xian , Lan Yong-Yi
Published: July 2023

In this article we consider the Kirchhoff-Schrodinger equation $$ -\Big((a+b\int_{\mathbb{R}^3}|\nabla u|^2\,dx\Big)\Delta u +\lambda u=k(x)f(u),\quad x\in \mathbb{R}^3, $$ where \(u\in H^{1}(\mathbb{R}^3)\),\(\lambda >0\), \(a>0\), \(b\geq 0\) are real constants, \(k:\mathbb{R}^3\to \mathbb{R}\) and \(f \in \mathcal{C}(\mathbb{R},\mathbb{R})\). To overcome the difficulties that k is non-symmetric and the non-linear, and that f is non-homogeneous, we prove the existence a positive solution using projections on a general Pohozaev type manifold, and the linking theorem.
Gradient regularity for non-autonomous functionals with Dini or non-Dini continuous coefficients
Authors: Baroni Paolo , Coscia Alessandra
Published: July 2023

We prove \(C^1\) regularity for local vectorial minimizers of the non-autonomous functional$$w\in W^{1,1}_{\rm loc}(\Omega;\mathbb{R}^N)\mapsto \int_{\Omega}b(x)\big[|Dw|^p+a(x)|Dw|^p\log(e+|Dw|)\big] \,dx\,,$$with \(\Omega\) open subset of \(\mathbb{R}^n\), \(n\geq2\) , \(p>1\),\(0\leq a(\cdot)\leq \|a\|_{L^{\infty}(\Omega)}<\infty\), and\(0<\nu\leq b(\cdot)\leq L\). The result is valid provided that the function \(a(\cdot)\)is \(\log\)-Dini continuous and that the coefficient $b(\cdot)$ is Dini continuous orit is weakly differentiable and its gradient locally belongs to the Lorentz space\(L^{n,1}(\Omega;\mathbb{R}^n)\).
Well-posedness of stochastic time fractional 2D-Stokes models with finite and infinite delay
Authors: Xu Jiaohui , Caraballo Tomas
Published: July 2023

We analyze the well-posedness of two versions of a stochastic time delay fractional 2D-Stokes model with nonlinear multiplicative noise. The main tool to prove the existence and uniqueness of mild solutions is a fixed point argument. The results for the first model can only be proved for \(\alpha\in (1/2,1)\), and the global existence in time is shown only when the noise is additive. As for the second model, all results are true for \(\alpha \in (0,1)\), and the global solutions in time is shown for general nonlinear multiplicative noise. The analyzes for the finite and infinite delay cases, follow the same lines, but they require different phase spaces and estimates. This article can be considered as a first approximation to the challenging model of stochastic time fractional Navier-Stokes (with or without delay) which so far remains as an open problem.
A third look at the first result of Landesman-Lazer type
Authors: Amster Pablo
Published: July 2023

We review some of the Landesman-Lazer-Leach results and provide elementary proofs by means of shooting type arguments. An appropriate extension of a first result by Alan Lazer to systems can be regarded as a generalization of the fundamental theorem of algebra.

For more information see https://ejde.math.txstate.edu/special/01/a1/abstr.html
Oscillation time and damping coefficients in a nonlinear pendulum
Authors: Arango Jaime
Published: July 2023

We establish a relationship between the normalized damping coefficients and the time that takes a nonlinear pendulum to complete one oscillation starting from an initial position with no velocity. We provide sufficient conditions on the nonlinear restitution force so that this oscillation time does not depend monotonically on the viscosity damping coefficient.

For more information see  https://ejde.math.txstate.edu/special/01/a2/abstr.html
Infinitely many radial solutions for a p-Laplacian problem with negative weight at the origin
Authors: Castro Alfonso , Cossio Jorge , Herron Sigifredo , Velez Carlos
Published: July 2023

We prove the existence of infinitely many sign-changing radial solutions for a Dirichlet problem in a ball defined by the p-Laplacian operator perturbed by a nonlinearity of the form \(W(|x|)g(u),\) where the weight function W changes sign exactly once, \(W(0)<;0\),  \(W(1) > 0}, and function g is p-superlinear at infinity. Standard phase plane analysis arguments do not apply here because the solutions to the corresponding initial value problem may blow up in the region where the weight function is negative. Our result extend those in [2] where W is assumed to be positive at 0 and negative at 1.

For more infromation see  https://ejde.math.txstate.edu/special/01/c2/abstr.html
Eigenvalues and bifurcation for Neumann problems with indefinite weights
Authors: Calanchi Marta , Ruf Bernhard
Published: July 2023

We consider eigenvalue problems and bifurcation of positive solutions for elliptic equations with indefinite weights and with Neumann boundary conditions. We give complete results concerning the existence and non-existence of positive solutions for the superlinear coercive and non-coercive problems, showing a surprising complementarity of the respective results.

For more information see  https://ejde.math.txstate.edu/special/01/c4/abstr.html
Bifurcation from infinity with oscillatory nonlinearity for Neumann problems
Authors: Chhetri Maya , Mavinga Nsoki , Pardo Rosa
Published: July 2023

We consider a sublinear perturbation of an elliptic eigenvalue problem with Neumann boundary condition. We give sufficient conditions on the nonlinear perturbation which guarantee that the unbounded continuum, bifurcating from infinity at the first eigenvalue, contains an unbounded sequence of turning points as well as an unbounded sequence of resonant solutions. We prove our result by using bifurcation theory combined with a careful analysis of the oscillatory behavior of the continuum near the bifurcation point.

For more information see  https://ejde.math.txstate.edu/special/01/c5/abstr.html
mean value property and zeros of holomorphic functions (Gauss, Poisson, Bolzano, and Cauchy meet in the complex plane)
Authors: Mawhin Jean
Published: July 2023

An existence condition for a zero of holomorphic functions in a disk is stated and proved in a very simple way using the mean value property. It contains as special cases Bolzano's theorem and Brouwer fixed point theorem in a disk for holomorphic functions, the fundamental theorem of algebra and an asymptotic condition for the existence of zeros of transcendental entire functions. An elementary proof of the used mean value property is given.
For more information see  https://ejde.math.txstate.edu/special/01/m2/abstr.html
Oscillatory solutions and critical exponents for fully nonlinear equations
Authors: Pacella Filomena , Stolnicki David
Published: July 2023

We study existence and nonexistence of radial positive solutions for a class of fully nonlinear equations involving Pucci's extremal operators. By analyzing the periodic orbits of an associated dynamical system we are able to give estimates on the range of the exponents for which entire oscillating  solutions exist. This, in turn, allows to improve previous bounds on the critical exponents defined in [2].

For more information see  https://ejde.math.txstate.edu/special/01/p1/abstr.html
Twin positive solutions for resonant singular (p,q)-equations
Authors: Onete Florin I. , Papageorgiou Nikolaos S. , Radulescu Vicentiu D.
Published: July 2023

We consider a Dirichlet (p,q)-equation with a reaction having the combined effects of a singular term and of a resonant perturbation. Using an auxiliary problem to bypass the singularity and variational tools from critical point theory, with truncation and comparison techniques, we show that the problem has two positive smooth solutions. For more information see  https://ejde.math.txstate.edu/special/01/r1/abstr.html
asymmetric problem at resonance with a one-sided Ahmad-Lazer-Paul condition
Authors: Recova Leandro L. , Rumbos Adolfo J.
Published: July 2023

In this article, we study the semilinear elliptic boundary value problem $$\displaylines{ -\Delta u = -\lambda_1u^{-}+g(x,u),\quad \text{in }\Omega;\cr u =0,\quad \text{on }\partial\Omega, }$$ where \(u^{-}\) denotes the negative part of \(u:\Omega\to \mathbb{R}\); \(\lambda_1\) is the first eigenvalue of the N-dimensional Laplacian with Dirichlet boundary conditions in a connected, open, bounded set \(\Omega\subset\mathbb{R}^N\), \(N\geq 2\); and \(g: \overline{\Omega}\times\mathbb{R}\to\mathbb{R}\) is a continuous function. Assuming a one-sided Ahmad-Lazer-Paul condition, we establish conditions for existence and multiplicity of solutions by using variational methods and infinite-dimensional Morse Theory
For more information see   https://ejde.math.txstate.edu/special/01/r2/abstr.html
Pentingnya Manajemen Sumber Daya Manusia (MSDM) Dalam Meningkatkan Kinerja Organisasi
Authors: Pahira Siti Hapsah , Rinaldy Rio
Published: July 2023

Sumber daya manusia memiliki kedudukan yang penting pada setiap organisasi karena untuk mencapai kinerja organisasi yang maksimal perlu memanfaatkan sumber daya yang dimilikinya termasuk sumber daya manusia. Memanfaatkan individu-individu yang ada di dalam organisasi untuk ikut serta memaksimalkan kinerja organisasi adalah tugas dari manajemen sumber daya manusia. Penelitian ini bertujuan untuk mengetahui pentingnya manajemen sumber daya manusia dalam meningkatkan kinerja organisasi. Penelitian ini menggunakan pendekatan kualitatif dengan model analisis interaktif Miles and Huberman. Analisis data kualitatif dilakukan secara interaktif dan terus menerus sampai tuntas, sehingga datanya jenuh dan terdiri dari 3 aktivitas utama yakni: reduksi data, penyajian data, dan penarikan kesimpulan. Berdasarkan penelitian dihasilkan bahwa pentingnya manajemen sumber daya manusia (SDM) dalam meningkatkan kinerja organisasi telah terbukti signifikan dalam konteks bisnis dan manajemen. Manajemen SDM memainkan peran penting dalam menciptakan budaya kerja yang sehat, meningkatkan motivasi karyawan, dan meningkatkan produktivitas organisasi secara keseluruhan. Dengan memperhatikan faktor-faktor seperti kepemimpinan transformasional, pengembangan karyawan, pengelolaan keragaman, dan manajemen kinerja berbasis hasil, MSDM dapat menciptakan lingkungan kerja yang efektif dan memastikan bahwa organisasi memiliki tim kerja yang berkualitas dan berkinerja tinggi, sehingga dapat menghadapi tantangan bisnis, meningkatkan daya saing, dan mencapai kesuksesan jangka panjang.
Security and privacy analysis based on Internet of Things in the fourth industrial generation (Industry 4.0)
Authors: Bayanati Mahmonir
Published: July 2023

The connection of smart devices using the Internet has dramatically changed the way people live, and this concept has also been extended to the industrial sector. This practice not only provides more stable, faster, and safer communications but also makes it possible to realize the concept of the smart factory in the fourth industrial revolution. The Internet of Things uses a unique Internet Protocol to identify, control, and transmit data to individuals as well as databases. Data is collected through the Internet of Things, stored in cloud storage, and managed and calculated through analytical tools. Internet of Things security is a field of technology that focuses on protecting connected devices and networks in the Internet of Things (IoT). Ensuring the safety of networks with connected IoT devices is critical. Security in the Internet of Things includes a wide range of techniques, strategies, protocols, and measures aimed at mitigating the ever-increasing vulnerabilities of the Internet of Things in modern businesses. The simultaneous connection of objects also brings privacy concerns. For this reason, in this research, an effort has been made to examine and analyze the most important privacy requirements in the Internet of Things in digital businesses in Industry 4.0. In this regard, by using experts' opinions and literature review, privacy requirements were extracted and evaluated using fuzzy non-linear decision-making methodology. The results showed that acquired and intrinsic information has the highest importance.
Optimization under Uncertainty: Machine Learning Approach
Authors: Mohammadi Reza , Farsijani Hasan
Published: July 2023

Data is the new oil. From the beginning of the 21st century, data is similar to what oil was in the 18th century, an immensely untapped valuable asset. This paper reviews recent advances in the field of optimization under uncertainty via a modern data lens and highlights key research challenges and the promise of data-driven optimization that organically integrates machine learning and mathematical programming for decision-making under uncertainty. A brief review of classical mathematical programming techniques for hedging against uncertainty is first presented, along with their wide spectrum of applications in Process Systems Engineering. we provide an introduction to the topic of uncertainty in machine learning as well as an overview of attempts so far at handling uncertainty in general and formalizing this distinction in particular. In line with the statistical tradition, uncertainty has long been perceived as almost synonymous with standard probability and probabilistic predictions. Yet, due to the steadily increasing relevance of machine learning for practical applications and related issues such as safety requirements, new problems, and challenges have recently been identified by machine learning scholars, and these problems may call for new methodological developments.
Digital Forensics
Authors:   Department of Information Technology, Faculty of Computing and Information Technology,  King Abdulaziz University,  Jeddah, 21589, Saudi Arabia, Salama Reda
Published: July 2023

An understanding of how digital forensics integrates with the overall response to cybersecurity incidents is key to securing your organization's infrastructure from attacks. This edition will help you perform cutting-edge digital forensic activities and incident response. After focusing on the fundamentals of incident response that are critical to any information security team, you’ll move on to exploring the incident response framework. From understanding its importance to creating a swift and effective response to security incidents, the book will guide you with the help of useful examples. As you progress, you’ll discover the role that threat intelligence plays in the incident response process. You’ll also learn how to prepare an incident response report that documents the findings of your analysis. Finally, in addition to various incident response activities, the book will address malware analysis, and demonstrate how you can proactively use your digital forensic skills in threat hunting.
Effect of Financial Literacy and Fintech Payment of Financial Management Behavior with Internal Locus of Control as Moderator
Authors: Hidayati Aulia Riska , Nugroho Dwiyanjana Santyo
Published: July 2023

This study examines private university students in West Jakarta which aims to determine the effect of financial literacy and fintech payments on financial management behavior with internal locus of control as a moderator variable. The dependent variables used are financial literacy and fintech payments. The analysis of this study used multiple linear regression with SPSS 27 (Statistical Package for Social Science). The results of this study indicate that: (a) financial literacy influences financial management behavior; (b) fintech payments affect financial management behavior; (c) internal locus of control strengthens the relationship between financial literacy and financial management behavior; (d) the internal locus of control strengthens the relationship between fintech payments and financial management behavior.

Keywords:financial literacy, fintech payments, financial management behavior, locus of control
Some haematological parameters of welders exposed to oxyacetylene in Calabar, Nigeria.
Authors:   Department of Haematology Pathology, University of Calabar Teaching Hospital, Calabar, CRS, Nigeria, Etura Joyce  Ezekiel , Ebi Kenneth.Igbor ,   Department of Haematology and Blood Transfusion Science, University of Calabar, Calabar, Nigeria, Akpan Uwem Okon ,   Department of Clinical Chemistry and Immunology, Faculty of Medical Laboratory Science, University of Calabar, Calabar, Nigeria., Asemota Enosakhare Aiyudubie ,   Department of Clinical Chemistry and Immunology, Faculty of Medical Laboratory Science, University of Calabar, Calabar, Nigeria, Emeribe Anthony Ogbonnaya ,   Department of Haematology and Blood Transfusion Science, University of Calabar, Calabar, CRS, Nigeria
Published: July 2023

Introduction: The welder’s flame contains toxic and mutagenic compounds that pose a potential health hazard associated with the occupation. This study assessed some haematological parameters in a population of welders in Calabar, Southern Nigeria. Methods: This was a cross-sectional study involving 50 welders exposed to oxyacetylene as test subjects and 50 non-welders as controls. The haematological parameters were analyzed using the Sysmex XE- 2100 haematology autoanalyser. Data was analyzed using SPSS version 21.0 with Student’s t-test and Pearson’s correlation. P <0.05 was considered statistically significant. Results: The platelets count was significantly lower (p=0.041) in the welders compared to the controls while neutrophils count was significantly higher (p=0.0001) in the welders than in the controls. The neutrophils count was significantly lower (p=0.0001) in welders exposed for 1-5 years compared to those exposed for over 5 years. Red blood cell count correlated negatively with platelets count (r= -0.415, p =0.003) while MCHC and MCV correlated negatively (r= -0.428, p =0.002) Conclusions: The study revealed a significant reduction and increase in platelets and neutrophils counts respectively in the welders exposed to oxyacetylene gas
Polish factor in formation and elaboration of the European Union’s policy in regard to Ukraine
Authors:   Yuriy Fedkovych Chernivtsi National University, Burdiak Vira
Published: July 2023

the paper focuses on interrelations between two countries in the sphere of European integration policy, Poland’s assistance and support to Ukraine on its way to the EU. The author analyzes Poland’s external policy in regard to Ukraine over the last ten years after the former joined the EU, points out the attempts to force integration of Ukraine to the EU under V. Yushchenko, to commence dialogue with V. Yanukovych and compel the latter to start reforms, and over the last years – these have been the attempts to support democratic transformation of Ukraine. However, the fact is that despite friendly relations with Ukrainian leaders and lobbying Kyiv’s interests in the European Union, at none of the stages could Warsaw succeed in achieving its objectives concerning Ukraine. Nevertheless, Poland does not give up on implementing its vision of the “Eastern policy” as to Ukraine. Nowadays, Poland pursues efforts within the program of the eastern partnership, to make its main “mission in the east” – strategic partnership with Ukraine – an imperative for the EU foreign policy, despite all rageful changes, which have taken place in the post-Soviet territory or as a result of them.