Jay D. Raman¹, James Thomas¹, Steven M. Lucas¹, Karim Bensalah¹, Yair Lotan¹, Clayton Trimmer², Jeffrey A. Cadeddu¹

Canadian Journal of Urology, Vol.15, No.2, pp. 3980-3985, 2008

Abstract Objective: The experience with radiofrequency ablation (RFA) in solitary kidneys is limited in numbers and follow-up. Therefore, we report our oncologic and renal function outcomes of RFA for T1a tumors in patients with a solitary kidney.
Methods: From April 2000 to August 2007, 242 patients were treated with RFA for renal cortical masses. Sixteen patients with localized tumors ≤ 4 cm in a solitary kidney were identified. Clinical and radiographic data were reviewed to assess indications, complications, disease recurrence, and renal function.
Results: Twenty-one renal masses were ablated in 16 patients with a solitary kidney. The mean patient… More >

Sang-Hyun Lee¹, Sung-Sik Woo¹, Seung-Ho Cho¹, Lan Chung¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 115-120, 2008, DOI:10.3970/icces.2008.008.115

Abstract In this study, based on the results from the sinusoidal base excitation analyses of a single degree of freedom system with a tuned mass damper (TMD), the optimal friction is computed so that the rail friction improve the performance of the TMD. The magnitude of the optimal friction increases with increasing mass ratio of the TMD and decreases with increasing structural damping. Particularly, it is observed that the optimized friction force gives better control performance than the optimized viscous damping of the TMD. However, because the performance of the TMD considerably deteriorates when the friction More >

L. Bennamoun¹, A. Belhamri²

FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.4, pp. 221-230, 2008, DOI:10.3970/fdmp.2008.004.221

Abstract This work focuses on tyipical heat and mass transfer phenomena during the processing of products in the context of the packed-bed drying method (products arranged in thick layers into dryers working in forced convection mode). The dryers are modeled as porous media at the macroscopic level. The simulations are carried out using the mass, momentum (written in the framework of the Darcy's law approximation) and energy equations applied for the different components. A diffusion model based on Fick's law is also used to take into account the drying kinetics. This approach allows monitoring of the More >

A.A. Ivanova¹, V.G. Kozlov^1,2,3, D.A. Polezhaev¹, D. Pareau³, M. Stambouli³

FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.3, pp. 211-220, 2008, DOI:10.3970/fdmp.2008.004.211

Abstract The problem for the optimization of mass-transfer on the interface of two immiscible liquids by means of vibrational hydromechanics is studied experimentally. A new vibrational cell of Lewis's type expressly conceived for such purposes is described. Flow is generated by activators in the form of disks inducing translational axial oscillations near the opposite end faces of the cavity. It is shown that such vibrating disks can lead to the onset of a large-scale toroidal whirlwind effectively mixing the liquid throughout the volume. According to the experiments, in particular, axisymmetrical radial flows are generated on both More >

Michelle L. Ramírez, Christopher P. Evans

Canadian Journal of Urology, Vol.14, Suppl.6, pp. 39-47, 2007

Abstract The incidence of small renal masses (< 4 cm) is increasing due to the widespread use of imaging studies. Many of these incidental lesions may remain asymptomatic or in fact be benign, and recent insight into their natural course has contributed to modifications in management. With improvements in biopsy technique and minimally invasive technologies, appropriate diagnosis and treatment of these masses are further being evaluated. Other contemporary approaches, including surveillance, laparoscopic partial nephrectomy, enucleation, ablative procedures, and high-intensity focused ultrasound, are weighed against open nephron-sparing surgery, the current gold standard for treatment. Here, we review More >

Ragnar Asplund^1,2

Canadian Journal of Urology, Vol.14, No.1, pp. 3424-3428, 2007

Abstract Objective: To assess the relationship of nocturia and sleep to body weight.
Materials and methods: A questionnaire survey among all (n=10216) members of a pensioners' association in the Swedish counties of Västerbotten and Norrbotten.
Results: A total of 6103 evaluable questionnaires were received, of which 39.5% were from men. The response rate was 61.3%. The ages of the male and female participants were 73.0 (6.0) [mean (SD)] and 72.6 (6.7) years, respectively. Body mass index (BMI) was 25.4 (3.1) in men and 25.4 (3.7) in women. BMI increased in parallel with increasing number of nocturnal micturition episodes More >

Karen M. Jones^1,2, Amar Singh³, Gabriel P. Haas³, Steve K. Landas¹

Canadian Journal of Urology, Vol.14, No.2, pp. 3518-3522, 2007

Abstract Adrenocortical carcinoma can have a clinical presentation that mimics a primary renal tumor. We describe a case of a 47-year-old male who presented with flank pain, weight loss, and a 14 cm mass arising from the upper pole of the right kidney on imaging. Upon surgical resection he was found to have a 1500 gram stage II adrenocortical carcinoma. The clinical features, pathologic findings, grading criteria, and differential diagnosis of adrenocortical carcinoma are reviewed. More >

Canadian Journal of Urology, Vol.14, No.4, pp. 3616-3620, 2007

Abstract Objective: The current standard of care for radiographically identified enhancing renal lesions is surgical removal. However, some of these lesions prove to be benign and did not truly warrant extirpation. Mass size has been traditionally described as a parameter to predict the malignant potential. We compiled our experience with surgically treated renal masses and correlated lesion size with final pathology.
Materials and methods: We performed a retrospective analysis of extirpative renal surgery and resultant renal mass pathology from 1998-January 2006. Nephrectomies performed for non-malignant disease or transitional cell carcinomas were excluded. Renal tumors were staged by the… More >

JOÃO PAULO MARDEGAN ISSA^*, RODRIGO TIOSSI^*, MAMIE MIZUSAKI IYOMASA^**

BIOCELL, Vol.31, No.3, pp. 375-382, 2007, DOI:10.32604/biocell.2007.31.375

Abstract The aim of this study was to evaluate alterations in the masseter muscle of 30 male guinea-pigs submitted to occlusal alteration. The animals were divided into 2 equal groups, the control group (C) only submitted to surgical stress, and the occlusal altered group (T) submitted to teeth extraction. Each group was subdivided into 3 groups, with 5 animals, for the following studies: macroscopy and vessels distribution, light microscopy and histochemical analysis, with animals’ perfusion 2 months after surgery. Data were submitted to statistical analysis. Macroscopically, an anteroposterior orientation of the muscular fibers was found and More >

J. Gajdošík¹, M. Šejnoha¹, J. Zeman¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.4, No.2, pp. 129-136, 2007, DOI:10.3970/icces.2007.004.129

Abstract Rock masses with relatively high concentration of discontinuities or joints are considered. Being aware of limitations of various averaging techniques such as the self consistent or Mori-Tanaka methods in providing reliable estimates of generally nonlinear macroscopic response of jointed rock masses, the paper introduces a notion of statistically equivalent periodic unit cell (SEPUC). Such a unit cell contains, in order to reduce the problem complexity, of the orders of magnitude less number of joints in comparison with the actual material system. In analogy with two-phase composites, the SEPUC is expected to be found in a More >