Degenerative spondylolisthesis has long been recognized as a cause of chronic low back pain and sciatica. Extensive anatonmical and embryological studies have not fully explained the cause of this painful condition. The mechanism of pain in degenerative spondylolisthesis has been confirmed by demonstrating the disc lesion pre-operatively by X-rays and MR imaging followed by surgical treatment i...

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 ...

The authors review and compare posterior lumbar interbody fusion (PLIF) with transforaminal lumbar interbody fusion (TLIF). A review of the literature is performed wherein the history, indications for surgery, surgical procedures with their respective biomechanical advantages, potential complications, and grafting substances are presented. Along with the technical advancements and improvements ...

We study the problem of mining and summarizing multiple time series effectively and efficiently. We propose PLiF, a novel method to discover essential characteristics (“fingerprints”), by exploiting the joint dynamics in numerical sequences. Our fingerprinting method has the following benefits: (a) it leads to interpretable features; (b) it is versatile: PLiF enables numerous mining tasks, incl...

BACKGROUND We retrospectively evaluated the clinical and radiological outcomes of posterior lumbar interbody fusion (PLIF) with using a unilateral single cage and a local morselized bone graft. METHODS Fifty three patients who underwent PLIF with a unilateral single cage filled with local morselized bone graft were enrolled in this study. The average follow-up duration was 31.1 months. The cl...

We report on high-speed CH planar laser-induced fluorescence (PLIF) imaging in turbulent diffusion flames using a multimode-pumped optical parametric oscillator (OPO). The OPO is pumped by the third-harmonic output of a multimode Nd:YAG cluster for direct signal excitation in the A-X (0,0) band of the CH radical. The lasing threshold, conversion efficiency, and linewidth are shown to depend on ...

1 . I N T R O D U C T I O N Microrobotics researches require to operate on autonomous devices with simple design and limited costs and energy consumption, even if this fact limits the possible tasks of each single robot. In the last few years the interest in micro mechatronic systems is increasing and several different kind of microrobots have been designed [1], [2],[3]. Applications of these r...

Abs ract : In the present paper, the development of a high-resolution PIV-PLIF combined system for the simultaneous measurements of velocity and passive scalar concentration fields is described. The high-resolution PIV-PLIF combined system is used to perform the simultaneous whole-field measurements of velocity and concentration in the near field of a turbulent jet mixing flow. The characterist...