L. Belarche^1,2, B. Abourida¹, S. Smolen³

FDMP-Fluid Dynamics & Materials Processing, Vol.11, No.2, pp. 157-170, 2015, DOI:10.3970/fdmp.2015.011.157

Abstract Natural convection in a cubical cavity, discretely heated is studied numerically using a three-dimensional finite volume formulation. Two heating square portions are placed on the vertical wall of the enclosure, while the rest of the considered wall is adiabatic. The opposite vertical wall is maintained at a cold uniform temperature and the other walls are adiabatic. Effects of the heating sections dimensions ε (0.15 ≤ ε ≤ 0.35) and the Rayleigh number Ra (10³ ≤ Ra ≤ 10⁷) on the fluid flow and the heat transfer within the cavity are studied. The obtained results show that the flow More >

Christopher Reynolds, Michael Hannon, Kathleen Lehman, Lewis E. Harpster, Jay D. Raman

Canadian Journal of Urology, Vol.21, No.1, pp. 7145-7149, 2014

Abstract Introduction: Partial nephrectomy (PN) via open or minimally invasive (MI) techniques is the referent standard for managing renal cell carcinoma (RCC) whenever possible. Outcomes of MIPN in the obese patient population are incompletely defined. We investigate the feasibility of MIPN in obesity class I-III patients via comparison of surgical outcomes to those with a lower body mass index (BMI).
Materials and methods: The electronic medical records of 184 consecutive patients undergoing MIPN via laparoscopic (n = 109) or robotic (n = 75) techniques were reviewed. Patients were classified into the following patient cohorts stratified by BMI:… More >

Vassilios Tzortzis¹, Konstantinos Dimitropoulos¹, Stavros Gravas¹, Anastasios Karatzas¹, Ioannis Zachos¹, Ioannis Gkialas², Georgios Papadopoulos², Michael Melekos¹

Canadian Journal of Urology, Vol.21, No.1, pp. 7114-7119, 2014

Abstract Introduction: The aim of this retrospective study was to evaluate the impact of stapling devices use on overweight and obese bladder cancer patients treated with radical cystectomy (RC).
Materials and methods: Fifty-two overweight and 24 obese patients underwent open RC for muscle invasive bladder cancer. Bladder removal was performed using standard suture technique (SST) or multifire autosuture articulated vascular Endo-GIA (eG). Twenty-three overweight and 11 obese patients formed the SST arms and the remaining 29 overweight and 13 obese patients formed the eG arms. Intra and postoperative parameters and early postoperative complications (30 days) using the… More >

Brahim Mahfoud¹, Rachid Bessaih^1,2

FDMP-Fluid Dynamics & Materials Processing, Vol.8, No.1, pp. 1-26, 2012, DOI:10.3970/fdmp.2011.008.001

Abstract Oscillatory swirling flows in a cylindrical enclosure, having aspect ratio (height/radius) γ=2, filled with a liquid metal, and submitted to a destabilizing vertical temperature gradient (system heated from below) is investigated by means of direct numerical solution of the governing (continuity, radial and axial momentum,swirlandenergy)equations. The bottom and top disks are assumed to rotate at equal (co-rotating) and opposite (counter-rotating) angular velocities. The critical Reynoldsnumber,Re_cr and the critical frequency of oscillations, F_cr arecalculated as a function of the Richardson number, Ri, ranging between 0 and 4. Stability diagrams are presented, reflecting the results of the numerical More >

Ahmed Meskini, Mostafa Najam, Mustapha El Alami

FDMP-Fluid Dynamics & Materials Processing, Vol.7, No.1, pp. 97-110, 2011, DOI:10.3970/fdmp.2011.007.097

Abstract A numerical mixed convection investigation was carried out to study the enhancement of heat transfer in a square cavity with identical heated rectangular blocks adjacent to its upper wall, and submitted to a vertical jet of fresh air from below. The configuration so defined is an inverted "T"-shaped cavity presenting symmetry with respect to a vertical axis passing by the middle of the openings. The governing equations have been solved using the finite difference method. The parameters of this study are: Rayleigh number 10⁴ ≤ Ra ≤ 10⁶, Reynolds number 1 ≤ Re ≤ 1000, the opening More >

Hubertus Himmerich^1,2, Stephany Fulda¹, Jakob Linseisen^3,4, Henrike Seiler³, Günther Wolfram⁵, Stephanie Himmerich⁶, Kurt Gedrich⁶, Thomas Pollmächer^1,7

European Cytokine Network, Vol.17, No.3, pp. 196-201, 2006, DOI:10.1684/ecn.2006.0037

Abstract The cytokines tumor necrosis factor-a (TNF-α), soluble TNF receptors p55 and p75, and interleukin 6 (IL-6) are involved in host defense against several microbiological agents, in the process of inflammation and also in body weight regulation. In the present study, we sought to assess the influence of age, gender, smoking, and body mass index on plasma levels of TNF-α, TNF receptors, and IL-6 in more than 550 adult subjects randomly selected from the Bavarian population. None of the cytokine parameters had a normal distribution and all distributions were significantly skewed. The cytokine plasma levels investigated More >

Judd Boczko¹, Ralph Madeb¹, Dragan Golijanin¹, Erdal Erturk¹, Mary Mathe¹, Hitendra R. H. Patel², Jean V. Joseph¹

Canadian Journal of Urology, Vol.13, No.4, pp. 3169-3173, 2006

Abstract Objectives: Few centers perform extraperitoneal robot assisted radical prostatectomy. The average patient weight is increasing to the mildly obese. Little is known as to the difficulty-impact obesity may have on robot-assisted extraperitoneal prostatectomy (RAP). We assess our own experience with obese patients undergoing RAP.
Materials and methods: Information on 375 consecutive patients undergoing robot-assisted extraperitoneal prostatectomy by a single surgeon was gathered. Obesity is defined as having a body mass index (BMI) greater than 30 kg/m². Patients with BMI ≥30 were compared to those with BMI <30. Specific comparators between the groups were: age, total operating time,… More >