T. J Jaber¹, M. Khawaja¹, M.Z. Saghir¹

FDMP-Fluid Dynamics & Materials Processing, Vol.2, No.4, pp. 271-286, 2006, DOI:10.3970/fdmp.2006.002.271

Abstract This paper numerically investigates the interaction between thermodiffuion and buoyancy driven convection in a laterally heated vertical porous cavity for different permeability. The Firoozabadi model is applied to binary hydrocarbon mixtures: (i) the mixture of 1,2,3,4 tetrahydronaphtalene (THN) and dodecane (C12) with mass fraction of 50% for each component, (ii) 1,2,3,4 tetrahydronaphtalene and isobutylbenzene (IBB) with mass fraction of 50% for each component, and (iii) isobutylbenzene and dodecane with mass fraction of 50% for each component. The thermal and molecular diffusion coefficients, which are functions of the temperature and other properties of mixture, are calculated More >

S. Smaoui¹, A. Ben Hamida¹, I. Djeran-Maigre², H. Dumontet¹

CMC-Computers, Materials & Continua, Vol.4, No.3, pp. 153-162, 2006, DOI:10.3970/cmc.2006.004.153

Abstract An iterative homogenization approach is proposed in order to predict the nonlinear hydro-mechanical behaviour of porous media. This process is coupled to classical and modified secant extended methods and linear homogenization predictive schemes. At convergence of the iterative process, same equivalent behaviour is obtained for any secant method, any simplified homogenization used for the linear comparison material and for any initial porosity of the media. An application to the study of the nonlinear behaviour of clayey sediments is presented. The model parameters quantification is based on oedometric experimental results for different clays. More >

J. Sladek¹, V. Sladek¹, Ch. Zhang², F. Garcia-Sanche³, M. Wünsche²

CMC-Computers, Materials & Continua, Vol.4, No.2, pp. 109-118, 2006, DOI:10.3970/cmc.2006.004.109

Abstract Piezoelectric materials have wide range engineering applications in smart structures and devices. They have usually anisotropic properties. Except this complication electric and mechanical fields are coupled each other and the governing equations are much more complex than that in the classical elasticity. Thus, efficient computational methods to solve the boundary or the initial-boundary value problems for piezoelectric solids are required. In this paper, the Meshless local Petrov-Galerkin (MLPG) method with a Heaviside step function as the test functions is applied to solve two-dimensional (2-D) piezoelectric problems. The mechanical fields are described by the equations of… More >

Cengiz Kirmaz^1,2, Papatya Bayrak¹, Ozge Yilmaz³, Hasan Yuksel³

European Cytokine Network, Vol.16, No.2, pp. 128-134, 2005

Abstract Background. Allergic rhinitis (AR) is a disease characterized by IgE-mediated, allergic inflammation of the nasal mucosa. T helper (Th) 2 cells play an important role in the development of IgE-mediated diseases such as AR, with local overproduction of Th2 cytokines (IL-4, IL-5 and IL-13) at the site of allergic inflammation. Th1 cytokines (IL-12 and IFN-γ) are known to suppress this Th2 immune response, aiding the treatment of these diseases. β-1,3-1,6-glucan (Glucan) is an immunomodulator stimulating particularly the antitumor response. An efficient antitumor stimulation can be achieved through a Th1-mediated immune response. Objective. The aim of… More >

Michael Eng¹, Liam Taylor², Marja Verhoef², Scott Ernst³, Bryan Donnelly⁴

Canadian Journal of Urology, Vol.12, No.2, pp. 2607-2613, 2005

Abstract Background: To date, few two-arm active treatment randomized control trials (RCTs) have compared prostate cancer therapies.
Objective: To examine the difference and similarities between the reasons for accepting and declining participation in a two-arm active treatment RCT comparing external beam radiation therapy (EBRT) versus cryotherapy.
Methods: Eleven men with prostate cancer, selected purposively, participated in a 30-minute post-treatment semi-structured interview. Interviews were transcribed verbatim, coded and analyzed for patterns with the assistance of the text management (TM) software (NVivo).
Results: RCT accepters participated principally with the hope of being randomized into the cryotherapy treatment arm. Consequently, randomization into the More >

Tom Pickles¹, S. Larry Goldenberg², Gary Steinhoff¹

Canadian Journal of Urology, Vol.12, No.2, pp. 2593-2597, 2005

Abstract Introduction and objective: High-Intensity Focused Ultrasound (HIFU) is a technology that has moved from being used for benign prostate disease to the treatment of prostate cancer. A technology review was undertaken to guide patients and physicians as to its suitability.
Method: An evidence-based review of published papers in the English language, with additional material from internet and other sources.
Results and conclusions: Only case series have been published; there are no randomized studies. The quality of evidence is poor, with no reports having longer follow-up than a mean of 2 years, with median follow-ups substantially shorter. Efficacy outcomes are More >

Jin Yeon Cho¹, Jae Mo An², You Me Song¹, Seungsoo Lee¹, Dong Whan Choi¹

CMES-Computer Modeling in Engineering & Sciences, Vol.9, No.1, pp. 1-18, 2005, DOI:10.3970/cmes.2005.009.001

Abstract A displacement welding technique is proposed to carry out coupled analysis of the integrated whole model which consists of independently modeled finite element substructures. In the proposed method, the incompatible displacement fields in the interfaces of independently modeled substructures are directly welded together through a blended function that is newly defined in the transient region of mismatching interface. To construct the blended function, the moving least squares function, which does not require well-defined nodal connectivity, is utilized along with the original finite element shape function. The meshless character of the moving least squares function makes More >

W. J. Ferguson¹, B. Palananthakumar²

CMES-Computer Modeling in Engineering & Sciences, Vol.8, No.3, pp. 201-216, 2005, DOI:10.3970/cmes.2005.008.201

Abstract Environmental and safety issues associated with landfill gas require the control of off-site migration. Mathematical modelling can assist in the understanding of the processes and mechanisms controlling gas migration from municipal waste disposal sites. This paper presents the development and application of a mathematical model that simulates landfill gas migration within a partially saturated soil. This model accounts for two-phase flow and incorporates multi-component (methane, carbon dioxide, dry air and moisture) transport in the gas and liquid phases together with concomitant heat migration. The governing system of fully coupled non-linear partial differential equations of the… More >

Wanlin Guo^1,2, Huajian Gao²

CMES-Computer Modeling in Engineering & Sciences, Vol.7, No.1, pp. 19-34, 2005, DOI:10.3970/cmes.2005.007.019

Abstract A systematic investigation is performed on energy dissipation related interaction force associated with interlayer motion of sliding, rotation and telescoping between any two possible neighboring carbon nanotubes. In particular, we analyze the interlayer corrugation energy and sliding, rotation and telescoping resistance force associated with the Lennard-Jones potential as well as a registry-dependent graphitic potential. It is found that the interlayer resistance associated with both of these potentials can vary with the morphology, length and diameter of the two tubes. Energy dissipation related fluctuation of the resistant force can be as low as 10^-18N/atom between the most More >

Sean van Diepen, John Grantmyre

Canadian Journal of Urology, Vol.11, No.1, pp. 2139-2140, 2004

Abstract Double-J ureteral stents facilitating the drainage of urine from the kidney to the bladder are widely used. Stents designed for patient self-removal are commonplace. We report a case of urosepsis that lead to the incidental discovery of a failed self-removal of a double-J ureteral stent. The retrieval cord broke during self-removal and the patient mistook the string for the stent. Adequate patient education is essential to assure successful self-removal. More >