Recent technological innovations have enabled the development of a new class of dynamic (vibration-insensitive) interferometer based on a CCD pixel-level phase-shifting approach. We present theoretical and experimental results for an interferometer based on this pixelated phase-shifting technique. Analyses of component errors and instrument functionality are presented. We show that the majority...

This paper describes a student independent research project. The project task was to evaluate the low frequency errors of Thermal Voltage Converters (TVCs). A method to evaluate the low frequency errors of TVCs has been developed ([ 1], [2]). This method is based on measurements of the dc transfer function and time constant of the tested TVC. The error analysis is performed in the frequency dom...

Minimizing the risk of system failure arising from soft errors in any computer structure requires identifying those components whose failure is likely to impact on system functionality. Clearly, the degree of soft errors tolerance is not the same for all components. Hence, to improve soft errors tolerance, critical components can be flagged and measures can be taken to lower their criticalities...

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Figure 3: The use of the two-step approach for 3-pt waterfat separation with a bipolar acquisition. Water images from phase-sensitive IDEAL processing (a) and the two-step approach (b). A linear phase correction was applied before IDEAL in both cases. The residual fat signal in (a) (arrows) is due to the uncorrected higher order eddy currents that are resolved using the two-step approach (b). (...

It was generally expected that monotone schemes are oscillationfree for hyperbolic conservation laws. However, recently local oscillations were observed and usually understood to be caused by relative phase errors. In order to further explain this, we first investigate the discretization of initial data that trigger the chequerboard mode, the highest frequency mode. Then we proceed to use the d...

In this work, we report a novel high capacity (number of degrees of freedom) open loop adaptive optics method, termed digital optical phase conjugation (DOPC), which provides a robust optoelectronic optical phase conjugation (OPC) solution. We showed that our prototype can phase conjugate light fields with approximately 3.9 x 10(-3) degree accuracy over a range of approximately 3 degrees and ca...

Introduction: Direction and latency of electrical connectivity between different sites of brain explains brain neural functionality. We compared efficiency of cross correlation and phase locking methods in time lag estimation which are based on local field potential (LFP) and LFPspike signals, respectively. Methods: Signals recorded from MT area of a macaque’s brain was used in a simulation ...

We consider sparse image reconstruction methods for synthetic aperture radar (SAR) and discuss how issues related to the phase of the complex-valued SAR reflectivities and the phase of the observed SAR data emerge and are handled in a number of currently available methods. In particular, we consider analysis and synthesis models for sparsity-driven SAR imaging, and discuss how the optimization ...