Chowhan S.S.¹, G.N. Shinde²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.1, pp. 67-74, 2009, DOI:10.3970/icces.2009.009.067

Abstract Feature selection, often used as a pre-processing step to machine learning, is designed to reduce dimensionality, eliminate irrelevant data and improve accuracy. Iris Basis is our first attempt to reduce the dimensionality of the problem while focusing only on parts of the scene that effectively identify the individual. Independent Component Analysis (ICA) is to extract iris feature to recognize iris pattern. Principal Component Analysis (PCA) is a dimension-reduction tool that can be used to reduce a large set of variables to a small set that still contains most of the information in the large set. More >

I. Karagoz, F.Kaya

CMES-Computer Modeling in Engineering & Sciences, Vol.43, No.2, pp. 111-130, 2009, DOI:10.3970/cmes.2009.043.111

Abstract The aim of this work is to investigate the suitability of various turbulence models and their options for highly complex swirling flows in tangential inlet cyclones. Three-dimensional, steady governing equations for the incompressible, turbulent flow inside the cyclone are solved numerically. The prediction performance of three popular turbulence models and various options available for these models was evaluated by comparing the computed velocity profiles and pressure drop with the experimental data given in the literature. Results obtained from the numerical tests have demonstrated that the swirl factor for the RNG k-emodel has considerably influence on More >

Raju Sethuraman¹, N.R.Rajesh²

CMES-Computer Modeling in Engineering & Sciences, Vol.39, No.1, pp. 67-100, 2009, DOI:10.3970/cmes.2009.039.067

Abstract This paper presents a methodology based on Partition of Unity Finite Element Method (PUFEM) and Pseudo Elastic Analysis for solving material non-linear fracture problems within the scope of total deformation theory of plasticity. Local enrichment base functions are used to represent the asymptotic field near the crack tip and discontinuous field across the crack faces. An iterative linear elastic analysis using PUFEM is carried out for the determination of elastic-plastic crack tip stress fields by treating effective material properties as spatial field variables. The effective material parameters are defined using deformation theory and are updated… More >

Jitesh V. Patel¹, Christopher V. Chambers², Leonard G. Gomella¹

Canadian Journal of Urology, Vol.15, Suppl.4, pp. 54-62, 2008

Abstract Asymptomatic microscopic and gross hematuria are common problems for the primary care physician. The exact defi nition of microscopic hematuria is debated, but is defi ned by one group as > 3 red blood cells/high power microscopic fi eld. While the causes of hematuria are extensive, the most common differential diagnosis for both microscopic and gross hematuria in adults includes infection, malignancy, and urolithiasis. Clinical evaluation of these patients often involves urological consultation with urine cytology, urine culture, imaging studies, and cystoscopy. Patients who have no identifi able cause after an extensive workup should be More >

Charnita M. Zeigler-Johnson¹, Hanna Rennert², R. Devi Mittal³, Mohamed Jalloh⁴, Rajeev Sachdeva⁵, S. Bruce Malkowicz¹, Anil Mandhani³, B. Mittal³, Serigne M. Gueye⁴, Timothy R. Rebbeck¹

Canadian Journal of Urology, Vol.15, No.3, pp. 4056-4064, 2008

Abstract Introduction: Prostate cancer is common around the world, but rates of advanced disease differ substantially by race and geography. Although a major health issue, little is known about prostate cancer presentation in West Africa and India compared to the United States (US).
Objective: The aim of this study was to compare prostate tumor characteristics in four populations of men from the US, Senegal and India.
Materials and methods: We recruited prostate cancer patients from four hospital-based populations. The sample included 338 African-Americans, 1265 European-Americans, 122 Asian Indians, and 72 Senegalese. Questionnaire and medical record data were collected on… More >

Kaili Mao¹, Cécile Badoual², Philippe Camparo³, Nicolas Barry Delongchamps¹, Annick Vieillefond⁴, Anh-Tuan Dinh-Xuan⁵, Michaël Peyromaure¹

Canadian Journal of Urology, Vol.15, No.5, pp. 4257-4262, 2008

Abstract Objectives: To study the prognostic value of vascular endothelial growth factor (VEGF)-A and its receptor VEGFR-1 in localized prostate cancer.
Methods: One hundred patients undergoing radical prostatectomy (RP) for clinically localized prostate cancer were prospectively included. Plasma levels of VEGF-A were measured preoperatively. After intervention, tissue microarrays were built from the RP specimens. VEGF-A and VEGFR-1 expressions in prostate cancer tissue were determined using immunochemistry. Then the associations between plasma levels of VEGF-A, VEGF-A and VEGFR-1 expressions in prostate cancer tissue, and the outcome of patients were analyzed.
Results: After a median follow-up of 22 months, 14 patients More >

A. Rama Ch,ra Murthy¹, G.S. Palani¹, Nagesh R. Iyer¹

Structural Durability & Health Monitoring, Vol.4, No.4, pp. 221-230, 2008, DOI:10.3970/sdhm.2008.004.221

Abstract Empirical formulae based on experimental data to evaluate concrete penetration depth under impact loading are often used due to the complexity of the phenomena. Several design codes employ empirical formulae for the design of protective barriers. This paper presents the details of relative assessment of the use of well known empirical formulae for evaluation of concrete penetration depth under impact loading. The empirical formulae employed in the present studies include Conwep, Army corps, Haldar, Ammann and Whitney, UKAEA, BRL, Modified Petry and modified NDRC. Appropriate expressions and limitations for these empirical formulae have been provided.… More >

Y. Y. Kim¹, B. Y. Lee², J. K. Kim²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.4, pp. 167-172, 2008, DOI:10.3970/icces.2008.007.167

Abstract The fiber dispersion performance in fiber-reinforced cementitious composites is a crucial factor with respect to achieving desired mechanical performance. However, evaluation of the fiber dispersion performance in the composite PVA-ECC (Polyvinyl alcohol-Engineered Cementitious Composite) is extremely challenging because of the low contrast of PVA fibers with the cement-based matrix. In the present work, an enhanced image processing technique including more detailed classification of types of fibers and adaptation of a morphological reconstruction, the fiber detection performance is enhanced. Test results using artificial and real fiber images showed that a distribution coefficient α_f, referred to as the More >

Abhijit Sinha Roy^*, Lloyd H. Back^†, Rupak K. Banerjee^‡

Molecular & Cellular Biomechanics, Vol.5, No.4, pp. 229-246, 2008, DOI:10.3970/mcb.2008.005.229

Abstract The in vivo and ex vivo compliance of arteries are expected to be closely related and estimated. Fluid-structure interaction analysis can assess the agreement between the two compliances. To evaluate this hypothesis, a pulsatile fluid-structure interaction analysis of blood flow in femoral artery of a dog was conducted using: (1) measured in vivo mean pressure (72.5 mmHg), mean pressure drop (0.59 mmHg), mean velocity (15.1 cm/sec); and (2) ex vivo measurements of non -- linear elastic properties of femoral artery. Additional analyses were conducted for physiological pressures (104.1 and 140.7 mmHg) and blood flow using a characteristic linear pressure More >

Y. C. Shiah¹, C. L. Tan², V.G. Lee³

CMES-Computer Modeling in Engineering & Sciences, Vol.34, No.3, pp. 205-226, 2008, DOI:10.3970/cmes.2008.034.205

Abstract The main impediment to the development of efficient algorithms for the stress analysis of 3D generally anisotropic elastic solids using the boundary element method (BEM) and the local boundary integral equation (LBIE) meshless method over the years is the complexity of the fundamental solutions and the computational burden to evaluate them. The ability to analytically simplify and reduce them into as explicit a form as possible so that they can be directly computed will offer significant cost savings. In addition, they facilitate easy implementation using existing numerical algorithms with the above-mentioned methods that have been More >