ABSTRACT Introduction: Spinopelvic parameters related to sagittal balance have become increasinglyimportantamong spine surgeons due their correlation with patient satisfaction rates. Objective: The goal of this study was evaluate changes in spinal after lumbar surgery using PLIF, the posterior interbody fusion technique. Methods: sample consisted adult patients degenerative disease submitted ar...

This experimental study describes the effect of oscillating grid on hydrodynamics and mass transfer in an aquarium. The contribution two driving elements CO2 is identified. Depending operating conditions, either these effects add up promote circulation transport liquid, or are opposite, liquid velocity then reduced. On other hand, with regard to gas-liquid transfer, use beneficial since, under ...

Centrally staged swirl combustion can effectively reduce NO x emission. However, the complex field is susceptible to producing large-scale coherent structures, such as precessing vortex core and central (CVC). This study mainly investigates effect of CVC on flow flame in a centrally spray combustor at elevated temperature pressure using 10 kHz high-speed CH * chemiluminescence (CL), 20 particle...

Previous attempts to quantify copepod feeding have either been indirect (measuring the phytoplankton concentration before and after copepods were introduced to a sample), or direct (measuring the gut fluorescence of individual copepods feeding on phytoplankton). The disadvantage of the first method is that we obtain little information about the activities of individual copepods, and how their f...

A planar laser-induced fluorescence (PLIF) technique for visualizing gas–liquid mass transfer and wake structure of rising gas bubbles is described. The method uses an aqueous solution of the pH-sensitive dye Naphthofluorescein and CO2 as a tracer gas. It features a high spatial resolution and frame rates of up to 500 Hz, providing the ability to capture cinematographic image sequences. By stee...

PURPOSE To present and validate a new method for 4D flow quantification of vortex-ring mixing during early, rapid filling of the left ventricle (LV) as a potential index of diastolic dysfunction and heart failure. MATERIALS AND METHODS 4D flow mixing measurements were validated using planar laser-induced fluorescence (PLIF) in a phantom setup. Controls (n = 23) and heart failure patients (n =...

Here, the mixing of the freeboard gas with the gas of single bubbles and a continuous stream of bubbles is investigated using acetone planar laser induced fluorescence (PLIF), a technique only recently introduced to fluidized bed research [Solimene et al. Chem. Eng. Sci. 2007, 62, 94]. Various improvements with respect to laser diagnostics are presented leading to optimal signals from acetone P...

Heat release rate is a fundamental property of great importance for the theoretical and experimental elucidation of unsteady flame behaviors such as combustion noise, combustion instabilities, and pulsed combustion. Investigations of such thermoacoustic interactions require a reliable indicator of heat release rate capable of resolving spatial structures in turbulent flames. Traditionally, heat...