INTRODUCTION Nowadays, the occurrence of surgical benign ano-perianal diseases (SBAPD) is raising. Radiofrequency (RF) represents a surgical therapeutic method using high frequency radio waves to perform incisions, excisions and tissue coagulation. The main purpose of the study is to validate the possibility to use RF within the surgical treatment for outpatients with SBAPD; at the same time, a...

Monograph Article dissertation (summary + original articles) Department Laboratory Field of research Opponent(s) Supervisor (Instructor) Abstract Keywords radio frequency, radio receiver, direct conversion, low-noise amplifier, downconversion mixer Design, analysis, and optimization of radio frequency front-ends for integrated wireless receivers X This thesis consists of six publications and an...

This experimental study shows the validity of Sheridan’s method in determining plasma density in low pressure, weakly magnetized, RF plasmas using ion saturation current data measured by a planar Langmuir probe. The ion density derived from Sheridan’s method which takes into account the sheath expansion around the negatively biased probe tip, presents a good consistency with the electron densit...

Random Forests (Breiman 2001) (RF) are a fully non-parametric statistical method requiring no distributional assumptions on covariate relation to the response. RF are a robust, nonlinear technique that optimizes predictive accuracy by fitting an ensemble of trees to stabilize model estimates. Random Forests for survival (Ishwaran and Kogalur 2007; Ishwaran, Kogalur, Blackstone, and Lauer 2008) ...

ii To my dear wife, Liang iii Acknowledgments First, I would like to thank my advisor Professor Larry Pileggi for all his support and continuous guidance throughout the past five years. He opened up a wide variety of research topics that I can explore during my early years at Carnegie Mellon University (CMU) and helped me find my research path that eventually leads to this dissertation. Second,...

A spectroscopic imaging technique with high spatial resolution was used for the measurement of the static magnetic field homogeneity of RF coils. Measured magnetic fields of optimised and not optimised saddle-shaped coils were compared with the theoretical calculations. Results are in good qualitative agreement between calculated and measured magnetic field distributions. Quantitative disagreem...

two dimensional thin layer chromatography on polyamide sheets is a useful method for identification of pth-amino acids which have very close rf-values. the solvent systems described here are particularly effective and have an edge over other solvent systems used for the separation of pth-amino acids. the solvent systems provide a clear separation of all pth-amono acids except lle / leu in a rel...

A novel method for excitation of RF B1 field in high-field (3-T) magnetic resonance imaging (MRI) systems using a subject-loaded quadrifilar helical antenna as an RF coil is proposed, evaluated, and demonstrated. Design, analysis, characterization, and evaluation of the novel coil when situated in a 3-T MRI bore and loaded with different phantoms are performed and cross-validated by extensive n...

BACKGROUND A dynamic preload index such as stroke volume variation (SVV) is not as reliable in spontaneous breathing (SB) patients as in mechanically ventilated patients. This study examined the hypothesis that spectral analysis of hemodynamic variables during paced breathing (PB) activity may be a feasible index of volume changes and fluid responsiveness, despite insufficient respiratory chang...