نتایج جستجو برای: selective compensation

تعداد نتایج: 241379  

Journal: :The Gerontologist 2015
Peter Martin Norene Kelly Boaz Kahana Eva Kahana Bradley J Willcox D Craig Willcox Leonard W Poon

PURPOSE OF THE STUDY Everyone wants to age successfully; however, the definition and criteria of successful aging remain vague for laypersons, researchers, and policymakers in spite of decades of research on the topic. This paper highlights work of scholars who made significant theoretical contributions to the topic. DESIGN AND METHODS A thorough review and evaluation of the literature on suc...

2011
Nickolaas Maria van Rodijnen Pieters Math Sjack Hoop Marius Nap

Propidium Iodide is a fluorochrome that is used to measure the DNA content of individual cells, taken from solid tissues, with a flow cytometer. Compensation for spectral cross-over of this fluorochrome still leads to compensation results that are depending on operator experience. We present a data-driven compensation (DDC) algorithm that is designed to automatically compensate combined DNA phe...

2006
M. Mailand

Within current implementations of mobile terminals, more and more analog components are replaced by appropriate digital processing. On the one hand, the analog front-ends become less complex. On the other hand, more digital signal processing is required to compensate for the spurious effects of the front-end. In this article, the frequency-selective imbalance of the in-phase and quadrature-phas...

2014
Jafar Rasi Behzad Mozaffari

approach at each branch of per-tone equalization (PTEQ) structure has been applied for insufficient cyclic prefix (CP) length. Because of the high amount of adaptive filters and their complex adaption process in PTEQ structure, SCU has been proposed. So using this method leads to reduce the computational complexity while the performance is almost being unchanged. Moreover, using set-membership ...

Journal: :Molecular vision 2007
John Thomas Siegwart Christianne E Strang

PURPOSE To better characterize the role of proteoglycans in scleral tissue remodeling during the development of minus lens induced myopia and during recovery in tree shrews. METHODS Competitive reverse-transcription polymerase chain reaction (RT-PCR) was used to quantify the scleral mRNA levels for aggrecan, decorin, biglycan, and lumican in a group of tree shrews following four days of monoc...

2008
T. Nielsen P. Börnert U. Katscher I. Graesslin

Introduction Parallel RF excitation using multi-element transmit coils is of interest to reduce pulse duration for spatially selective excitation. Originally, RF pulse design was formulated in the frequency domain for arbitrary k-space trajectories (Transmit-SENSE, [1]) or in the spatial domain for echo-planar trajectories [2]. Later, Transmit-SENSE was formulated in the spatial domain in [3] a...

2007
Z. Sun J. L. Zweier

Introduction: Adiabatic full passage (AFP) pulses are well known for their immunity to the B1 inhomogeneity [1], and have been applied in many areas of magnetic resonance spectroscopy (MRS) and MRI, such as signal sensitivity enhancement and sharp volume boundary definition [2-4]. However, the application of selective AFP refocusing pulses has been limited by the inherent nonlinear phase disper...

Journal: :Magnetic resonance in medicine 2007
Yiping P Du Manish Dalwani Korey Wylie Eric Claus Jason R Tregellas

Susceptibility-induced magnetic field gradients (SFGs) can result in severe signal loss in the orbitofrontal cortex (OFC) in gradient-echo-based functional MRI (fMRI) studies. Although conventional z-shim techniques can effectively recover the MRI signal in this region, the substantial penalty in imaging time hampers their use in routine fMRI studies. A modified z-shim technique with high imagi...

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