Reverse osmosis (RO) desalination is considered a viable alternative to reduce water scarcity; however, its energy consumption high. Photovoltaic (PV) in processes has gained popularity recent years. The temperature identified as variable that directly affects the behavior of different parameters RO process and production PV panels. objective this study was evaluate effect on polarization factor at 20, 23, 26 30 °C. Tests were conducted plant driven by fixed 24-module system received spray...

This article focuses on determining the students´ interactions in Virtual English Course with Distance Education Model (DEM) at Mumbai University, India. For this purpose, an analysis was carried out database of students during academic period 2015 - 2018 to select necessary attributes that allowed generate a data mining model. An methods subsequently comparing each them order one helps development project, choosing Crisp-dm method since it contains multiple phases indicating activity be...

Water scarcity slows down economical and industrial development, population growth.Desalination by reverse osmosis is a separation process used to reduce the dissolved salt content of saline water usable level offer one solution alternative this problem.The use simulators allows obtain optimal design in production energy consumption.The objective study was select operation conditions using IMSDesign simulator, provide satisfy demand Puerto Peñasco, Mexico, with projection year 2040.Data...

Abstract We study the existence of solution to system differential equations $$(\phi (u'))'=f(t,u,u')$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mo>(</mml:mo> <mml:mi>ϕ</mml:mi> <mml:mi>u</mml:mi> <mml:mo>′</mml:mo> </mml:msup> <mml:mo>)</mml:mo> </mml:mrow> <mml:mo>=</mml:mo> <mml:mi>f</mml:mi> <mml:mi>t</mml:mi> <mml:mo>,</mml:mo> </mml:math> with nonlinear boundary conditions $$\begin{aligned} g(u(0),u,u')=0, \quad h(u'(1),u,u')=0,...

We provide new results regarding the localization of solutions nonlinear operator systems. make use a combination Krasnosel'skiĭ cone compression–expansion type methodologies and Schauder-type ones. In particular we establish solution system within product conical shell closed convex set. By iterating this procedure prove existence multiple solutions. illustrate our theoretical by applying them to solvability systems Hammerstein integral equations. case two specific boundary value problems...

Abstract By means of fixed point index theory for multivalued maps, we provide an analogue the classical Birkhoff–Kellogg Theorem in context discontinuous operators acting on affine wedges Banach spaces. Our is fairly general and can be applied, example, to eigenvalues parameter problems ordinary differential equations with discontinuities. We illustrate detail this fact a class second-order boundary value problem deviated arguments terms. In specific explicitly compute terms that occur our theory.

We introduce a new fixed point theorem of Krasnosel'skiĭ type for discontinuous operators. As an application we use it to study the existence positive solutions second-order differential problem with separated boundary conditions and nonlinearities.

Abstract We prove an existence result for systems of differential inclusions driven by multivalued mappings which need not assume closed or convex values everywhere, and be semicontinuous everywhere. Moreover, we consider differentiation with respect to a nondecreasing function, thus covering discrete, continuous impulsive problems under unique formulation. emphasize that our appears new even when the derivator is identity, i.e. derivatives are considered in usual sense. also apply theorem...

Desalination allows reducing water scarcity problems by means of techniques as reverse osmosis (RO), and currently, its main disadvantage is high energy demand.Therefore, this study assessed consumption a desalination plant RO with different current concentrations (5,000-36 000 mg/L total dissolved solids), maintaining constant feed conversion flux 14.4 m 3 /d 40%.Additionally, three photovoltaic (PV) systems were used an source: fixed, single-axis, dual-axis trackers.Instantaneous power was...

We present an alternative approach to the vector version of Krasnosel'skiĭ compression–expansion fixed point theorem due Precup, which is based on index. It allows us obtain new general versions this and also multiplicity results. emphasize that all them are coexistence theorems for operator systems, means every component points obtained non-trivial. Finally, these applied results concerning existence positive solutions systems Hammerstein integral equations radially symmetric...

This paper concerns the existence, localization and multiplicity of positive solutions for a φ-Laplacian problem with perturbed term that may have discontinuities in state variable. First, initial discontinuous differential equation is replaced by inclusion an upper semicontinuous term. Next, existence solution obtained via compression-expansion fixed point theorem composition two multivalued maps, finally, suitable control allows to prove any sense Carathéodory equation. No monotonicity...

The aim of this study is to extract knowledge from the final researches Mumbai University Science Faculty. Five classification models were applied: Vector Support Machines, Neural Networks, Decision Tree, Random Forest and Powering; considering Experiment Design Multivariate Analysis Lines. Results showed that for line, most accurate model was with 71.48% predictions are correct respecting total. Regarding there no significant difference in overall accuracy, fluctuating by 97%.

We provide new fixed point theorems for a class of discontinuous operators by combining theorem compression-expansion type these with monotone iterative methods. As an application we study the existence positive solutions nonlinear fourth-order boundary value problem.

We deal with the existence and localization of positive radial solutions for Dirichlet problems involving ‐Laplacian operators in a ball. In particular, Minkowski‐curvature equations are considered. Our approach relies on fixed point index techniques, which work thanks to Harnack‐type inequality terms seminorm. As consequence result, it is also derived several (even infinitely many) solutions.

We introduce a new definition of topological degree for meaningful class operators which need not be continuous.Subsequently, we derive number fixed point theorems such operators.As an application, deduce existence result first-order ODEs with discontinuous nonlinearities.

By means of fixed point index theory for multi-valued maps, we provide an analogue the classical Birkhoff--Kellogg Theorem in context discontinuous operators acting on affine wedges Banach spaces. Our is fairly general and can be applied, example, to eigenvalues parameter problems ordinary differential equations with discontinuities. We illustrate details this fact a class second order boundary value problem deviated arguments terms. In specific explicitly compute terms that occur our theory.

We present an existence principle for boundary value problems involving discontinuous ordinary differential equations of the second order using Krasovskii regularization technique. Especially we obtain sufficient conditions transversality type solutions to be also Carathéodory original problem. This result is applied on a certain billiard problem, which can thought as equation with state-dependent impulses that equivalent equation. In particular, new and multiplicity results Dirichlet in...

We use essential limits inferior and superior of the nonlinear part a discontinuous ODE to introduce some novel transversality conditions which imply that Filippov solutions are Carathéodory solutions. also prove uniqueness criteria based on different Lipschitz parts domain separated from one another by boundaries satisfy certain conditions.

Objective: To evaluate the quadruple aim (QA) as a model of strategic direction in clinic 2022. Methodology: Observational, descriptive, cross-sectional study using quantitative method based on components QA obtained from data clinic. The following strategy indicators were considered: health outcomes, experience care, team satisfaction, and financial sustainability. Results: Regarding percentage compliance was good, care satisfaction satisfactory, sustainability had good average. Conclusion:...