Browsing by Keywords "Algorithm"
Now showing items 1-20 of 34
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Accelerated phase-cycled SSFP imaging with compressed sensing
(Institute of Electrical and Electronics Engineers Inc., 2015)Balanced steady-state free precession (SSFP) imaging suffers from irrecoverable signal losses, known as banding artifacts, in regions of large B0 field inhomogeneity. A common solution is to acquire multiple phase-cycled ... -
Activity management algorithm for improving energy efficiency of small cell base stations in 5G heterogeneous networks
(Bilkent University, 2014)Heterogeneous networks (HetNets) are proposed in order to meet the increasing demand for next generation cellular wireless networks, but they also increase the energy consumption of the base stations. In this thesis, an ... -
Algebraic reconstraction for 3D magnetic resonance-electrical impedance tomography (MREIT) using one component of magnetic flux density
(Institute of Physics and Engineering in Medicine, 2004)Magnetic resonance-electrical impedance tomography (MREIT) algorithms fall into two categories: those utilizing internal current density and those utilizing only one component of measured magnetic flux density. The latter ... -
Analytical regularization based analysis of a spherical reflector symmetrically illuminated by an acoustic beam
(IEEE, 2000)A mathematically accurate and numerically efficient method of analysis of a spherical reflector, fed by a scalar beam produced by a complex source- point feed, is presented. Two cases, soft and hard reflector surface, are ... -
Application of the RIMARC algorithm to a large data set of action potentials and clinical parameters for risk prediction of atrial fibrillation
(Springer, 2015)Ex vivo recorded action potentials (APs) in human right atrial tissue from patients in sinus rhythm (SR) or atrial fibrillation (AF) display a characteristic spike-and-dome or triangular shape, respectively, but variability ... -
Attributed relational graphs for cell nucleus segmentation in fluorescence microscopy images
(IEEE, 2013)More rapid and accurate high-throughput screening in molecular cellular biology research has become possible with the development of automated microscopy imaging, for which cell nucleus segmentation commonly constitutes ... -
BRAPH: A graph theory software for the analysis of brain connectivity
(Public Library of Science, 2017)The brain is a large-scale complex network whose workings rely on the interaction between its various regions. In the past few years, the organization of the human brain network has been studied extensively using concepts ... -
A color and shape based algorithm for segmentation of white blood cells in peripheral blood and bone marrow images
(John Wiley & Sons, Inc., 2014)Computer-based imaging systems are becoming important tools for quantitative assessment of peripheral blood and bone marrow samples to help experts diagnose blood disorders such as acute leukemia. These systems generally ... -
Content-based retrieval of historical Ottoman documents stored as textual images
(IEEE, 2004)There is an accelerating demand to access the visual content of documents stored in historical and cultural archives. Availability of electronic imaging tools and effective image processing techniques makes it feasible to ... -
Cross-term-free time-frequency distribution reconstruction via lifted projections
(Institute of Electrical and Electronics Engineers, 2015-01)A crucial aspect of time-frequency (TF) analysis is the identification of separate components in a multicomponent signal. The Wigner-Ville distribution is the classical tool for representing such signals, but it suffers ... -
Cumulant-based parametric multichannel FIR system identification methods
(IEEE, 1993)In this paper, ''least squares'' and recursive methods for simultaneous identification of four nonminimum phase linear, time-invariant FIR systems are presented. The methods utilize the second- and fourth-order cumulants ... -
Current constrained voltage scaled reconstruction (CCVSR) algorithm for MR-EIT and its performance with different probing current patterns
(Institute of Physics Publishing, 2003)Conventional injected-current electrical impedance tomography (EIT) and magnetic resonance imaging (MRI) techniques can be combined to reconstruct high resolution true conductivity images. The magnetic flux density ... -
Data mining experiments on the Angiotensin II-Antagonist in Paroxysmal Atrial Fibrillation (ANTIPAF-AFNET 2) trial: ‘exposing the invisible’
(Oxford University Press, 2016)Aims: The aims of this study include (i) pursuing data-mining experiments on the Angiotensin II-Antagonist in Paroxysmal Atrial Fibrillation (ANTIPAF-AFNET 2) trial dataset containing atrial fibrillation (AF) burden scores ... -
Electrostatics of Polymer Translocation Events in Electrolyte Solutions
(American Institute of Physics Inc., 2016)We develop an analytical theory that accounts for the image and surface charge interactions between a charged dielectric membrane and a DNA molecule translocating through the membrane. Translocation events through neutral ... -
Experimental results for 2D magnetic resonance electrical impedance tomography (MR-EIT) using magnetic flux density in one direction
(Institute of Physics Publishing, 2003)Magnetic resonance electrical impedance tomography (MR-EIT) is an emerging imaging technique that reconstructs conductivity images using magnetic flux density measurements acquired employing MRI together with conventional ... -
Failed family photographs: errors left out from the algorithmic definition of perfect photographs
(Bilkent University, 2018-06)The subject matter of this study is defining and classifying “errors” left out from the algorithmic definition of “perfect photograph” in visual technologies and making understandable their relation with the developments ... -
A fast neural-network algorithm for VLSI cell placement
(Pergamon Press, 1998)Cell placement is an important phase of current VLSI circuit design styles such as standard cell, gate array, and Field Programmable Gate Array (FPGA). Although nondeterministic algorithms such as Simulated Annealing (SA) ... -
Feature issue of digital holography and 3D imaging (DH) introduction
(Optical Society of America (OSA), 2014-07)The OSA Topical Meeting "Digital Holography and 3D Imaging (DH)," was held in Seattle, Washington, July 13-17, 2014. Feature issues based on the DH meeting series have been released by Applied Optics (AO) since 2007. This ... -
Form and part through standard / non‐standard duality
(Bilkent University, 2017-09)This thesis formulates its research through a two‐fold approach: it introduces a novel algorithm, but first it establishes the relationship model through which the assessment of the algorithm should be made. It discusses ... -
Fourier transform magnetic resonance current density imaging (FT-MRCDI) from one component of magnetic flux density
(IOP Publishing, 2010-05-17)Fourier transform (FT)-based algorithms for magnetic resonance current density imaging (MRCDI) from one component of magnetic flux density have been developed for 2D and 3D problems. For 2D problems, where current is ...
