A method for optimizing MR imaging pulse sequence parameters in a statistical framework is presented. Parameters are defined to be optimal when the resulting scalar images yield optimal image segmentations using Bayesian pixel classification. Thus, Bayes risk is used as the objective function to minimize. Approximations are made to give a tractable solution in a four-step procedure. A sample ca...

A sliding mode control method is presented for Euler parameter command tracking of spacecraft maneuvers. Although only three Euler parameters are independent, desired closed-loop performance is specified on all four Euler parameters by way of four sliding surfaces in the Euler parameter error-error rate phase planes. The Euler parameters were chosen as the generalized coordinates for tracking t...

Congestion Control performs a very important role in Computer Networks, Modern Telecommunication, Internet and both wired and wireless communications are being intended for high-speed communication of large amounts of data. Due to lack of proper Congestion control mechanism the congestion collapse of such networks would become highly complex. A network with Streamed media traffic is a challenge...

This paper presents the development of optimal takeoff maneuvers for an AC75 foiling sailboat competing in oldest and most prestigious competition world, America’s Cup. The many challenges to developing these due its nonlinear, high-dimensional, highly unstable dynamics. During maneuver, boat starts water with low speed (displacement mode) increases until it reaches steady-state (the hull stays...

We propose differential holography as a method to overcome the long-standing forward-scattering problem in photoelectron holography and related techniques for the three-dimensional imaging of atoms. Atomic images reconstructed from experimental and theoretical Cu 3p holograms from Cu(001) demonstrate that this method suppresses strong forward-scattering effects so as to yield more accurate thre...

Mailing address: Marcelo Luiz Campos Vieira • Rua Cardoso de Melo, 463/21 04548-002 São Paulo, SP Brazil E-mail: [email protected] Manuscript received January 09, 2007; revised manuscript received January 01, 2007; accepted March 13, 2007. The use of three-dimensional echocardiography for the analysis of cardiac structures allows the viewing of planes that make the anatomic identification m...