This paper deals with the problem of robust trajectory tracking control, with a guaranteed H∞ performance, for free-floating manipulator systems. A new control strategy is developed based on the robot mathematical model and a fuzzy adaptive control law. The dynamic model of the free-floating space manipulator is described through the Dynamically Equivalent Manipulator approach. The fuzzy adapti...

Purpose of Report: Evaluate the effect of IV contrast use with FDG PET/CT on clinical interpretation of PET images for head and neck cancer. Procedures: 20 consecutive patients referred for PET/CT and contrast enhanced CT of the head and neck had two sets of PET images obtained. One set used standard low dose CT for attenuation correction, and the other used IV contrast enhanced diagnostic qual...

The ProReg XL Tool (Profile Regrouping Excel Tool) is a new tool suite designed to rapidly regroup a large number of identical electrophoretic profiles. This tool suite is coded in Visual Basic Application for Microsoft Excel, and thus requires this spreadsheet software to operate. It was designed for use with a new screening strategy of clones from an rrs (16S rDNA) clone library, but it may a...

Microscopic robots in the body could harvest energy from ultrasound to provide on-board control of autonomous behaviors such as measuring and communicating diagnostic information precisely delivering drugs. This paper evaluates acoustic power available micron-size that collect using pistons. Acoustic attenuation viscous drag on pistons are major limitations power. Frequencies around 100kHz can ...

To the best of our knowledge, proposed for the first time is the design of an optically broadband variable photonic delay line (VPDL) using an electronically controlled variable focus lens (ECVFL), mirror motion, and beam-conditioned free-space laser beam propagation. This loss-minimized fiber-coupled VPDL design using micro-optic components has the ability to simultaneously provide optical att...

OBJECTIVES SPECT/slow-rotation low-output CT systems can produce streak artifacts in filtered backprojection (FBP) attenuation maps, impacting attenuation correction (AC) in myocardial perfusion imaging. This paper presents an adaptive Bayesian iterative transmission reconstruction (ABITR) algorithm for more accurate AC. METHODS In each iteration, ABITR calculated a three-dimensional prior co...

This paper considers the adaptive robust control of nonlinear systems in the presence of parametric uncertainties and uncertain nonlinearities. The assumption on the allowable uncertain nonlinearities is relaxed to the extent that uncertain nonlinearities are required to be bounded by some known functions multiplied by unknown but bounded time-varying disturbances only. The approach uses robust...

In this paper, we study the problem of video quality prediction over the wireless 4G network. Video transmission data is collected from a real 4G SCM testbed for investigating factors that affect video quality. After feature transformation and selection on video and network parameters, video quality is predicted by solving as regression problem. Experimental results show that the dominated fact...

BACKGROUND Residential pesticide exposure has been linked to adverse health outcomes in adults and children. High-quality exposure estimates are critical for confirming these associations. Past epidemiologic studies have used one measurement of pesticide concentrations in carpet dust to characterize an individual's average long-term exposure. If concentrations vary over time, this approach coul...

Prior research has shown that adverse events in the lives of adolescents precipitate psychological distress, which in turn impairs self-control. This study (N = 1,343) examined the protective effects of stress mindsets-beliefs about the extent to which stress might be beneficial or strictly detrimental. The results confirmed that increasing the number of adverse life events across the school ye...