Πλοήγηση ανά Θέμα "Spectroscopy"
Αποτελέσματα 1-12 από 12
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An analytical discrete-ordinates solution of the S-model kinetic equations for flow in a cylindrical tube
(2002)An integro-differential form of the linearized S-model kinetic equations for describing flow in a cylindrical tube is projected in such a way as to yield a pair of coupled transport equations that defines the desired ... -
Comparison of three resistor network division circuits for the readout of 4 x 4 pixel SiPM arrays
(2013)The purpose of this study is to investigate the behavior of a flexible SensL's silicon photomultiplier array (SPMArray4) photodetector for possible applications in PET imaging. We have designed and evaluated three different ... -
The contribution of diffusion tensor imaging and magnetic resonance spectroscopy for the differentiation of breast lesions at 3T
(2014)Background: Conventional breast magnetic resonance imaging (MRI), including dynamic contrast-enhanced MR mammography (DCE-MRM), may lead to ambiguous diagnosis and unnecessary biopsies. Purpose: To investigate the contribution ... -
Differentiation of glioblastoma multiforme from metastatic brain tumor using proton magnetic resonance spectroscopy, diffusion and perfusion metrics at 3 T
(2012)Purpose: To assess the contribution of H-1-magnetic resonance spectroscopy (H-1-MRS), diffusion-weighted imaging (DWI), diffusion tensor imaging (DTI) and dynamic susceptibility contrast-enhanced (DSCE) imaging metrics in ... -
An efficient implementation on a low cost FPGA for photon detection in nuclear imaging
(2010)The aim of this study is to propose and evaluate a simple, open source, data acquisition (DAQ) tool, which provides accurate results for nuclear imaging applications. For this purpose a Xilinx Spartan3E Starter Kit, which ... -
Inverse solutions to radiative-transfer problems based on the binomial or the Henyey-Greenstein scattering law
(2002)Analytical techniques are used to solve two inverse radiative-transfer problems, for a finite plane-parallel medium, that are (i) based on the binomial scattering law and (ii) based on the Henyey-Greenstein scattering law. ... -
A Learning-Based Spectrum Access Stackelberg Game: Friendly Jammer-Assisted Communication Confrontation
(2021)Defensive and offensive capabilities are both significant in communication confrontation games. By exploiting the above two capabilities, a new confrontation mechanism in the spectrum domain between two opposing teams ... -
A new slicing scheme for efficient use of wireless testbeds
(2009)The gradually growing need for testbed use so as networking algorithms to be validated in real environments, has given rise to optimal utilization of testbed resources. Despite the fact that, many laboratories around the ... -
Proton magnetic resonance spectroscopy at 3T - Evaluation of metabolic profile of human brain lesions
(2009)Brain MR imaging at 3T has been increasingly used in clinical practice since a great deal of effort has been invested in research into high magnetic fields to overcome the difficulties of successively working with stronger ... -
Reduction of collisions and regret in time sharing schemes for opportunistic spectrum access
(2017)We examine decentralized learning and access algorithms for opportunistic spectrum access with multiple users. Several distributed algorithms have been proposed for this problem, mainly as an application of corresponding ... -
The temperature-jump problem for a mixture of two gases
(2001)An analytical variation of the discrete-ordinates method is used to establish a concise and accurate solution to the temperature-jump problem for a binary gas mixture. The analysis is based on Boltzmann equations of the ... -
Yyield prediction in a commercial apple orchard by analyzing RGB and multi-spectral images of trees during flowering period
(2011)The objective of the research was to study the spatial variability in an apple orchard and to develop methods for predicting the variation of the final yield. RGB and multi-spectral images of part of the trees were taken ...