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  • Open Access


    Overinvolved/Protective Parenting Questionnaires for Children: A Systematic Review in the Field of Internalizing Problems

    Alysha Lohman1, Jordana K. Bayer1,2,3,*

    International Journal of Mental Health Promotion, Vol.22, No.4, pp. 203-219, 2020, DOI:10.32604/IJMHP.2020.011789

    Abstract Overinvolved/protective parenting has emerged in child development literature as part of the etiology of internalizing problems (anxiety/depression). This review aimed to explore overinvolved/protective parenting questionnaires that exist in the internalizing literature for different childhood periods and their psychometric properties (reliability, validity, norms). A systematic review was conducted through seven databases and Google Scholar. Extraction and evaluation of psychometric properties were double coded. Four hundred and sixty publications were screened for eligibility, with 20 of these further assessed. Ten overinvolved/protective parenting questionnaires were described in the literature (between 1993 and 2019) six starting as young as More >

  • Open Access


    Introduction to the Special Issue on Design and Simulation in Additive Manufacturing

    Di Wang1, Yongqiang Yang1,*, Yingjun Wang1,*, Li Yang2, Hao Wang3, Shoufeng Yang4

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 1-4, 2021, DOI:10.32604/cmes.2021.015180

    Abstract This article has no abstract. More >

  • Open Access


    Estimating the Impact of COVID-19 Pandemic on the Research Community in the Kingdom of Saudi Arabia

    Abdulaziz Attaallah1, Masood Ahmad2, Adil Hussain Seh2, Alka Agrawal2, Rajeev Kumar2,3,*, Raees Ahmad Khan2

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 419-436, 2021, DOI:10.32604/cmes.2021.014263

    Abstract Ever since its outbreak in Wuhan, COVID-19 has cloaked the entire world in a pall of despondency and uncertainty. The present study describes the exploratory analysis of all COVID cases in Saudi Arabia. Besides, the study has executed the forecasting model for predicting the possible number of COVID-19 cases in Saudi Arabia till a defined period. Towards this intent, the study analyzed different age groups of patients (child, adult, elderly) who were affected by COVID-19. The analysis was done city-wise and also included the number of recoveries recorded in different cities. Furthermore, the study also… More >

  • Open Access


    Multiple Response Optimization of Dimensional Accuracy of Nimonic Alloy Miniature Gear Machined on Wire Edm Using Entropy Topsis Andpareto Anova

    Tina Chaudhary1,*, Arshad Noor Siddiquee2, Arindam Kumar Chanda3, Shafi Ahmad2, Irfan Anjum Badruddin4,*, Zahid A. Khan2

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 241-259, 2021, DOI:10.32604/cmes.2021.013368

    Abstract The purpose of this research is to obtain the optimum cutting parameters to achieve the dimensional accuracy of Nimonic alloy miniature gear manufactured using Wire EDM. The cutting parameters investigated in this study are current, pulse on time (PON), pulse off time (POFF), wire tension (WT) and dielectric fluids. Ethylene glycol, nanopowder of alumina and oxygen are mixed to demineralized water to prepare novel dielectric fluids. Deviation in inner diameter, deviation in outer diameter, deviation in land and deviation in tooth width are considered to check the dimensional accuracy. Taguchi L16 is employed for experimental design More >

  • Open Access


    Application of FCM Algorithm Combined with Articial Neural Network in TBM Operation Data

    Jingyi Fang1, Xueguan Song2, Nianmin Yao3, Maolin Shi2,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 397-417, 2021, DOI:10.32604/cmes.2021.012895

    Abstract Fuzzy clustering theory is widely used in data mining of full-face tunnel boring machine. However, the traditional fuzzy clustering algorithm based on objective function is difficult to effectively cluster functional data. We propose a new Fuzzy clustering algorithm, namely FCM–ANN algorithm. The algorithm replaces the clustering prototype of the FCM algorithm with the predicted value of the articial neural network. This makes the algorithm not only satisfy the clustering based on the traditional similarity criterion, but also can effectively cluster the functional data. In this paper, we rst use the t-test as an evaluation index… More >

  • Open Access


    CFD-Based Simulation and Analysis of Hydrothermal Aspects in Solar Channel Heat Exchangers with Various Designed Vortex Generators

    Mohamed Salmi1,2, Younes Menni3, Ali J. Chamkha4,5,*, Houari Ameur6, Rachid Maouedj7, Ahmed Youcef7

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 147-173, 2021, DOI:10.32604/cmes.2021.012839

    Abstract The hydrothermal behavior of air inside a solar channel heat exchanger equipped with various shaped ribs is analyzed numerically. The bottom wall of the exchanger is kept adiabatic, while a constant value of the temperature is set at the upper wall. The duct is equipped with a flat rectangular fin on the upper wall and an upstream V-shaped baffle on the lower wall. Furthermore, five hot wall-attached rib shapes are considered: trapezoidal, square, triangular pointing upstream (type I), triangular pointing downstream (type II), and equilateral-triangular (type III) cross sections. Effects of the flow rates are… More >

  • Open Access


    Isogeometric Boundary Element Analysis for 2D Transient Heat Conduction Problem with Radial Integration Method

    Leilei Chen1, Kunpeng Li1, Xuan Peng2, Haojie Lian3,4,*, Xiao Lin5, Zhuojia Fu6

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 125-146, 2021, DOI:10.32604/cmes.2021.012821

    Abstract This paper presents an isogeometric boundary element method (IGABEM) for transient heat conduction analysis. The Non-Uniform Rational B-spline (NURBS) basis functions, which are used to construct the geometry of the structures, are employed to discretize the physical unknowns in the boundary integral formulations of the governing equations. B´ezier extraction technique is employed to accelerate the evaluation of NURBS basis functions. We adopt a radial integration method to address the additional domain integrals. The numerical examples demonstrate the advantage of IGABEM in dimension reduction and the seamless connection between CAD and numerical analysis. More >

  • Open Access


    Topological Design of Microstructures of Materials Containing Multiple Phases of Distinct Poisson’s Ratios

    Kai Long1,*, Xiaoyu Yang1, Nouman Saeed1, Zhuo Chen1, Yi Min Xie2

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 293-310, 2021, DOI:10.32604/cmes.2021.012734

    Abstract A methodology for achieving the maximum bulk or shear modulus in an elastic composite composed of two isotropic phases with distinct Poisson’s ratios is proposed. A topology optimization algorithm is developed which is capable of nding microstructures with extreme properties very close to theoretical upper bounds. The effective mechanical properties of the designed composite are determined by a numerical homogenization technique. The sensitivities with respect to design variables are derived by simultaneously interpolating Young’s modulus and Poisson’s ratio using different parameters. The so-called solid isotropic material with penalization method is developed to establish the optimization… More >

  • Open Access


    A Meshless Collocation Method with Barycentric Lagrange Interpolation for Solving the Helmholtz Equation

    Miaomiao Yang, Wentao Ma, Yongbin Ge*

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 25-54, 2021, DOI:10.32604/cmes.2021.012575

    Abstract In this paper, Chebyshev interpolation nodes and barycentric Lagrange interpolation basis function are used to deduce the scheme for solving the Helmholtz equation. First of all, the interpolation basis function is applied to treat the spatial variables and their partial derivatives, and the collocation method for solving the second order differential equations is established. Secondly, the differential equations on a given test node. Finally, based on three kinds of test nodes, numerical experiments show that the present scheme can not only calculate the high wave numbers problems, but also calculate the variable wave numbers problems. More >

  • Open Access


    Lemniscate of Leaf Function

    Kazunori Shinohara*

    CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 275-292, 2021, DOI:10.32604/cmes.2021.012383

    Abstract A lemniscate is a curve defined by two foci, F1 and F2. If the distance between the focal points of F1F2 is 2a (a: constant), then any point P on the lemniscate curve satisfy the equation PF1 · PF2 = a2. Jacob Bernoulli first described the lemniscate in 1694. The Fagnano discovered the double angle formula of the lemniscate (1718). The Euler extended the Fagnano’s formula to a more general addition theorem (1751). The lemniscate function was subsequently proposed by Gauss around the year 1800. These insights were summarized by Jacobi as the theory of elliptic functions.… More >

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