BACKGROUND Great variability exists in the reported frequency of transitional vertebra in the general population as well as in symptomatic lumbar spine patients. OBJECTIVE To determine the occurrence rate of transitional vertebra in consecutive lumbar spine patients in our practice. DESIGN A prospective, observational study METHODS Plain films were viewed and the presence or absence of a ...

A transitional zone in the dog renal artery was documented and its parameters were recorded: length and volumes of the luminal wall, tunica intima, tunica media, and tunica adventitia—as well as these parameters in the nontransitional zone of artery. Twelve normal adult male dogs were studied. Th e specimens were processed in the routine manner for light and electron microscopy. Aft er the dete...

A method to bound the maximum energy perturbation for which regional stability of transitional fluid flow models can be guaranteed is introduced. The proposed exploits fact that model’s nonlinearities are both lossless and locally bounded uses axes lengths ellipsoids trajectory set containment as variables in conditions. Compared existing approaches based on quadratic constraints, leads an aver...

Herein, we address transitional actions class as a class between actions. Transitional actions should be useful for producing short-term action predictions while an action is transitive. However, transitional action recognition is difficult because actions and transitional actions partially overlap each other. To deal with this issue, we propose a subtle motion descriptor (SMD) that identifies ...

Cellular DNA content was determined by flow cytometry on routinely processed paraffin sections of 61 primary and untreated transitional cell carcinomas of the urinary bladder, and correlated with tumour grade and stage and clinical follow up. All 16 (25%) grade 1 carcinomas were diploid and all 11 (20%) grade 3 tumours were aneuploid. The 34 (55%) grade 2 carcinomas comprised 13 (40%) diploid a...

The present contribution reports direct numerical simulations of pulsatile flow through a 75% eccentric stenosis using the Lattice Boltzmann Method (LBM). The stenosis was previously studied by Varghese, Frankel, and Fischer 1 in a benchmark computation, and the goal of this work is to evaluate the LBM and the solver Musubi for transitional flows in anatomically realistic geometries. A part of ...

The primary objective of this study is to evaluate the accuracy of using computational fluid dynamics (CFD) turbulence models to predict entropy generation rates in bypass transitional boundary layers flows under zero and adverse pressure gradients. Entropy generation rates in such flows are evaluated employing the commercial CFD software, ANSYS FLUENT. Various turbulence and transitional model...

Title of dissertation: AN EMBEDDED-BOUNDARY FORMULATION FOR LARGE-EDDY SIMULATION OF TURBULENT FLOWS INTERACTING WITH MOVING BOUNDARIES Jianming Yang, Doctor of Philosophy, 2005 Directed by: Assistant Professor Elias Balaras Department of Mechanical Engineering A non-boundary-conforming formulation for simulating transitional and turbulent flows with complex geometries and dynamically moving bo...