Sirajul Haq¹, Siraj-ul-Islam², Arshed Ali³

CMES-Computer Modeling in Engineering & Sciences, Vol.38, No.1, pp. 1-24, 2008, DOI:10.3970/cmes.2008.038.001

Abstract In this paper we propose a meshfree technique for the numerical solution of the modified equal width wave (MEW) equation. Combination of collocation method using the radial basis functions (RBFs) with first order accurate forward difference approximation is employed for obtaining meshfree solution of the problem. Different types of RBFs are used for this purpose. Performance of the proposed method is successfully tested in terms of various error norms. In the case of non-availability of exact solution, performance of the new method is compared with the results obtained from the existing methods. Propagation of a More >

F.C. Araújo¹, L.J. Gray²

CMES-Computer Modeling in Engineering & Sciences, Vol.24, No.2&3, pp. 103-122, 2008, DOI:10.3970/cmes.2008.024.103

Abstract In recent years, carbon nanotubes (CNTs) have been widely employed to build advanced composites. In this work, a Boundary Element Method (BEM) is applied to 3D representative volume elements (RVEs) to estimate mechanical properties of CNT-based composites. To model the thin-walled nanotubes, special integration procedures for calculating nearly-strongly-singular integrals have been developed. The generic BE substructuring algorithm allows modeling complex CNT-reinforced polymers, containing any number of nanotubes of any shape (straight or curved). The subregion-by-subregion strategy, based on Krylov solvers, makes the independent generation, assembly, and storage of the many parts of the complete BE More >

P. Orsini¹, H. Power^1,2, H. Morvan¹

CMES-Computer Modeling in Engineering & Sciences, Vol.23, No.3, pp. 187-208, 2008, DOI:10.3970/cmes.2008.023.187

Abstract In this work, we present a modified Control Volume (CV) method that uses a Radial Basis Function (RBF) interpolation to improve the prediction of the flux accuracy at the faces of the CV. The method proposed differs from classical CV methods in the way that the flux at the cell surfaces is computed. A local RBF interpolation of the field variable is performed at the centres of the cell being integrated and its neighbours. This interpolation is then used to reconstruct the solution and its gradient in the integration points which support the flux computation. More >

V. Shevtsova^1,2, A. Mialdun¹, C. Ferrera^1,4, M. Ermakov^3,4, J. M. Montanero⁴

FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.1, pp. 43-54, 2008, DOI:10.3970/fdmp.2008.004.043

Abstract Dynamic free surface deformations induced by buoyant and thermocapillary convection in liquid bridges of 5cSt silicone oil are studied experimentally and numerically. The experiments are performed in ground conditions and static deformation is unavoidable. Convective motion starts in the liquid bridge as soon as ΔT ≠ 0 and initially leads to a stationary dynamic deformation of the free surface. Oscillatory motion starts at a critical value of ΔT and causes oscillations of the interface. The final supercritical shape of the free surface is a result of the static shape with superimposed subcritical stationary and oscillatory dynamic deformations. More >

Michael J. Manyak

Canadian Journal of Urology, Vol.14, Suppl.6, pp. 32-38, 2007

Abstract Rapid advances in imaging technology have whetted our collective appetites for practical clinical applications to assist the physician and patient in therapeutic decisions. Current limitations of imaging technology are being addressed by the convergence of technology in materials science, the computer industry, and biology which have led to improvements of diagnostic imaging. Refinements in image acquisition, fusion of images, and outcomes data now suggest use for image-guided therapy. Novel imaging agents and technologies appear to provide improved capabilities to detect malignant lymph nodes. Future applications of optical coherence tomography, electron paramagnetic resonance imaging, nanotechnology, and More >

Gary W. Bong, Thomas E. Keane

Canadian Journal of Urology, Vol.14, Suppl.6, pp. 2-9, 2007

Abstract Despite excellent success rates with radical prostatectomy and radiotherapy for the treatment of prostate cancer, a significant number of patients will experience a rise in their serum prostate specific antigen (PSA) level. A variety of salvage options in this scenario have been investigated and the choice to pursue surveillance, single therapy or combination therapy depends on clinical assessment of risk and location of tumor recurrence. After radical prostatectomy, for example, patients with low risk local disease may not require secondary therapy or may benefit from salvage radiotherapy. Those with higher risk disease, based on PSA More >

Lester S. Borden Jr., Paul M. Kozlowski, Christopher R. Porter, John M. Corman

Canadian Journal of Urology, Vol.14, No.2, pp. 3499-3501, 2007

Abstract Introduction: Robotic-assisted laparoscopic radical prostatectomy (RLRP) is playing an increasing role in the surgical management of prostate cancer. The benefits of minimally invasive surgery, enhanced surgeon familiarity with the instrumentation, and increased patient demand has led to the popularity of this surgical technique. There are, however, shortcomings specifically associated with this technology. Notably, instrumentation failure associated with robotic procedures represents a new and unique problem in urological surgery. We examine the rate of mechanical failure of the da Vinci robotic system and its impact on our prostate cancer program.
Materials and methods: We reviewed our prospective, institutional… More >

Ronald S. Boris, Sanjeev A. Kaul, Richard C. Sarle, Hans J. Stricker

Canadian Journal of Urology, Vol.14, No.3, pp. 3566-3570, 2007

Abstract Objective: To compare perioperative, functional and oncological outcomes of a single surgeon's experience with retropubic (RRP), perineal (RPP), and robotic assisted (RARP) radical prostatectomy.
Methods: Results from 150 radical prostatectomies performed by a single surgeon were compared. The groups consisted of the last 50 consecutive RRP (group 1) and RPP patients (group 2) and his first 50 RARP patients (group 3). He had significant experience in RRP and RPP and extensive training prior to performing RARP. The data was obtained from record review and patient survey. Patient demographics, operative parameters, pathological characteristics, complications, and functional outcomes… More >

Gabriel P. Haas

Canadian Journal of Urology, Vol.14, No.3, pp. 3534-3534, 2007

Abstract This article has no abstract. More >

Danny M. Rabah

Canadian Journal of Urology, Vol.14, No.4, pp. 3640-3642, 2007

Abstract The traditional treatment of choice for urachal carcinoma has been either an open radical cystectomy or the more recently accepted extended partial cystectomy and umbilectomy. Recently a laparoscopic technique has been reported. We report for the first time a robot-assisted technique for an extended partial cystectomy with en bloc umbilectomy for the management of urachal carcinoma in a 49-year-old man. More >