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  • Open Access

    ARTICLE

    Influence of the Extraction Temperature on the Properties of Biopolymers Obtained from Tannery Wastes

    M.A. Pérez-Limiñana*, M.M. Sánchez-Navarro, M.J. Escoto-Palacios, F. Arán-Aís, C. Orgilés-Barceló

    Journal of Renewable Materials, Vol.4, No.1, pp. 3-8, 2016, DOI:10.7569/JRM.2015.634119

    Abstract The tanning i ndustry generates very large quantities of industrial wastes. The advancement of European policy and legislation protecting the environment has prompted the transformation of tannery solid waste materials into valuable co-products, useful to be recycled or employed in other industries. The objective of this work is to obtain gelatine from tannery wastes, in order to reuse it as natural microencapsulating agent in the production of active materials with functional properties. Concretely, this paper focuses on the influence of the extraction temperature on gelatine properties and its microencapsulating ability. An alternative enzymatic pre-treatment to More >

  • Open Access

    ARTICLE

    3D Bio-Plotted Composite Scaffold Made of Collagen Treated Hydroxyapatite-Tricalciumphosphate for Rabbit Tibia Bone Regeneration

    Pranav S. Sapkal1*, Abhaykumar M. Kuthe1, Divya Ganapathy2, Shantanu C. Mathankar3, Sudhanshu Kuthe4

    Molecular & Cellular Biomechanics, Vol.13, No.2, pp. 115-136, 2016, DOI:10.3970/mcb.2016.013.131

    Abstract Biphasic calcium phosphate scaffolds with 20/80 HA/TCP ratio were fabricated using the 3D-Bioplotting system to heal critical size defects in rabbit tibia bone. Four different architectures were printed in a layer by layer fashion with lay down patterns viz. (a) 0°– 90°, (b) 0°– 45°– 90°– 135°, (c) 0°–108°– 216° and (d) 0°– 60°– 120°. After high-temperature sintering scaffolds were coated with collagen and were further characterized by (FTIR) Fourier Transform Infrared Spectroscopy, (SEM) Scanning Electron Microscopy, (XRD) X-Ray diffraction, Porosity analysis and Mechanical testing. Scaffold samples were tested for its ability to induce cytotoxicity… More >

  • Open Access

    ARTICLE

    A Unification of the Concepts of the Variational Iteration, Adomian Decomposition and Picard Iteration Methods; and a Local Variational Iteration Method

    Xuechuan Wang1, Satya N. Atluri2

    CMES-Computer Modeling in Engineering & Sciences, Vol.111, No.6, pp. 567-585, 2016, DOI:10.3970/cmes.2016.111.567

    Abstract This paper compares the variational iteration method (VIM), the Adomian decomposition method (ADM) and the Picard iteration method (PIM) for solving a system of first order nonlinear ordinary differential equations (ODEs). A unification of the concepts underlying these three methods is attempted by considering a very general iterative algorithm for VIM. It is found that all the three methods can be regarded as special cases of using a very general matrix of Lagrange multipliers in the iterative algorithm of VIM. The global variational iteration method is briefly reviewed, and further recast into a Local VIM, More >

  • Open Access

    ARTICLE

    A Homogenized Function to Recover Wave Source by Solving a Small Scale Linear System of Differencing Equations

    Chein-Shan Liu1,2,3, Wen Chen1, Ji Lin1

    CMES-Computer Modeling in Engineering & Sciences, Vol.111, No.5, pp. 421-435, 2016, DOI:10.3970/cmes.2016.111.421

    Abstract In order to recover unknown space-dependent function G(x) or unknown time-dependent function H(t) in the wave source F(x; t) = G(x)H(t), we develop a technique of homogenized function and differencing equations, which can significantly reduce the difficulty in the inverse wave source recovery problem, only needing to solve a few equations in the problem domain, since the initial condition/ boundary conditions and a supplementary final time condition are satisfied automatically. As a consequence, the eigenfunctions are used to expand the trial solutions, and then a small scale linear system is solved to determine the expansion More >

  • Open Access

    ARTICLE

    Structural Damage Detection Using a Modified Artificial Bee Colony Algorithm

    H.J. Xu1, Z.H. Ding1, Z.R. Lu1,2, J.K. Liu1

    CMES-Computer Modeling in Engineering & Sciences, Vol.111, No.4, pp. 335-355, 2016, DOI:10.3970/cmes.2016.111.335

    Abstract An optimization approach based on Artificial Bee Colony (ABC) algorithm is proposed for structural local damage detection in this study. The objective function for the damage identification problem is established by structural parameters and modal assurance criteria (MAC). The ABC algorithm is presented to solve the certain objective function. Then the Tournament Selection Strategy and chaotic search mechanism is adopted to enhance global search ability of the certain algorithm. A coupled double-beam system is studied as numerical example to illustrate the correctness and efficiency of the propose method. The simulation results show that the modified More >

  • Open Access

    ARTICLE

    Numerical Investigation Of Flow Dynamic In Mini- Channel: Case Of A Mini Diode Tesla

    Brahim DENNAI1*, Mohammed EL Bizani BELBOUKHARI1 , Tawfiq CHEKIFI1, Rachid KHELFAOUl1

    FDMP-Fluid Dynamics & Materials Processing, Vol.12, No.3, pp. 102-110, 2016, DOI:10.3970/fdmp.2016.012.102

    Abstract Microfluidic systems are used and exploited in various fields, as they are highly specific and developed in their use. The micro devices are used in various analyzes of medical disciplines, chemical and other fields. Our research team "MAAt" within ENERGARID laboratory is in the process of triggered several lines of research in this area, the micro-mixing, separation of micro particles, droplet production. For that, we need tools and micro devices to study the phenomena.. In this work, we present a theoretical study and numerical simulation of micro device (micro diode Tesla). A Diode Tesla is More >

  • Open Access

    ARTICLE

    Transient Heat Conduction in Materials with Linear Power-Law Temperature-Dependent Thermal Conductivity: Integral-Balance Approach

    Antoine Fabre1, Jordan Hristov2*, Rachid Bennacer1

    FDMP-Fluid Dynamics & Materials Processing, Vol.12, No.2, pp. 69-85, 2016, DOI:10.3970/fdmp.2016.012.069

    Abstract Closed form approximate solutions to nonlinear transient heat conduction with linear power-law k = k0(1±βTm) temperature-dependent thermal diffusivity have been developed by the integral-balance integral method under transient conditions. The solutions use improved direct approaches of the integral method and avoid the commonly used linearization by the Kirchhoff transformation. The main steps in the new solutions are improvements in the integration technique of the double-integration technique and the optimization of the exponent of the approximate parabolic profile with unspecified exponent. Solutions to Dirichlet boundary condition problem have been developed as examples by the classical Heat-balance Integral More >

  • Open Access

    ARTICLE

    Wave Propagation in a Magneto-Micropolar Thermoelastic Medium with Two Temperatures for Three-Phase-Lag Model

    SamiaM.Said1

    CMC-Computers, Materials & Continua, Vol.52, No.1, pp. 1-24, 2016, DOI:10.3970/cmc.2016.052.001

    Abstract The present paper is concerned with the wave propagation in a micropolar thermoelastic solid with distinct two temperatures under the effect of the magnetic field in the presence of the gravity field and an internal heat source. The formulation of the problem is applied in the context of the three-phase-lag model and Green-Naghdi theory without dissipation. The medium is a homogeneous isotropic thermoelastic in the half-space. The exact expressions of the considered variables are obtained by using normal mode analysis. Comparisons are made with the results in the two theories in the absence and presence More >

  • Open Access

    ARTICLE

    A systematic review of expanded prostate cancer index composite (EPIC) quality of life after surgery or radiation treatment

    Tsz Kin Lee1, Rodney Henry Breau2, Ranjeeta Mallick3, Libni Eapen4

    Canadian Journal of Urology, Vol.22, No.1, pp. 7599-7606, 2015

    Abstract Introduction: The Expanded Prostate Cancer Index Composite (EPIC) is a validated and widely adopted instrument that measures patient quality of life. This study aims to describe and compare patient quality of life in the bowel, urinary, and sexual domains across different prostate cancer treatments.
    Materials and methods: A systematic review of English articles published prior to 2012 was conducted. Peer reviewed articles reporting longitudinal EPIC data in a statistically analyzable form with clearly defined time points were included. Articles were assessed by content experts to ensure optimal treatment quality.
    Screening of studies and extraction of data… More >

  • Open Access

    ARTICLE

    Enhanced recovery protocols in urological surgery: a systematic review

    Domenic Di Rollo1, Aza Mohammed2, Alexander Rawlinson1, Jayne Douglas-Moore3, John Beatty3

    Canadian Journal of Urology, Vol.22, No.3, pp. 7817-7823, 2015

    Abstract Introduction: The principles of enhanced recovery after surgery (ERAS) protocols have been developed to optimize care and facilitate recovery after major surgery. The purpose of this systematic review is to present an upto-date assessment of the perioperative cares in complex urological surgery from the available evidence and ERAS group recommendations.
    Materials and methods: Systematic searches of PubMed, Embase, Cochrane library and conference abstracts and bibliographies databases.
    Results: A total of six studies were identified that met the inclusion criteria. Two examined the role of ERAS in radical cystectomy, and the rest examined its role in renal surgery More >

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