Browsing by Author "Christodoulou, Chris C."
Now showing items 1-20 of 54
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Conference Object
Analysis of fluctuation-induced firing in the presence of inhibition
Christodoulou, Chris C.; Clarkson, Trevor G.; Bugmann, Guido; Taylor, John G. (IEEE, 2000)This paper examines the computational role of inhibition as it moves towards balancing concurrent excitation using the biologically-inspired Temporal Noisy-Leaky Integrator (TNLI) neuron model. The TNLI incorporates ...
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Artificial neural networks for earthquake prediction using time series magnitude data or Seismic Electric Signals
Moustra, M.; Avraamides, Marios N.; Christodoulou, Chris C. (2011)The aim of this study is to evaluate the performance of artificial neural networks in predicting earthquakes occurring in the region of Greece with the use of different types of input data. More specifically, two different ...
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Automatic Landmark Location for Analysis of Cardiac MRI Images
Jayne, C.; Lanitis, A.; Christodoulou, Chris C. (2012)This paper addresses the problem of automatic location of landmarks used for the analysis of MRI cardiac images. Typically the landmarks of shapes in MRI images are located manually which is a time consuming process requiring ...
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Behavioral plasticity through the modulation of switch neurons
Vassiliades, Vassilis; Christodoulou, Chris C. (2016)A central question in artificial intelligence is how to design agents capable of switching between different behaviors in response to environmental changes. Taking inspiration from neuroscience, we address this problem by ...
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A Biophysical Model of Endocannabinoid-Mediated Short Term Depression in Hippocampal Inhibition
Zachariou, Margarita; Alexander, S. P. H.; Coombes, S.; Christodoulou, Chris C. (2013)Memories are believed to be represented in the synaptic pathways of vastly interconnected networks of neurons. The plasticity of synapses, that is, their strengthening and weakening depending on neuronal activity, is ...
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A biophysical model of endocannabinoidmediated short term depression of excitation in hippocampus
Zachariou, Margarita; Christodoulou, Chris C. (2013)
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Brain white matter lesions classification in multiple sclerosis subjects for the prognosis of future disability
Loizou, Christos P.; Kyriacou, Efthyvoulos C.; Seimenis, Ioannis; Pantzaris, Marios C.; Christodoulou, Chris C.; Pattichis, Constantinos S. (2011)This study investigates the application of classification methods for the prognosis of future disability on MRI-detectable brain white matter lesions in subjects diagnosed with clinical isolated syndrome (CIS) of multiple ...
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Coefficient of variation vs. mean interspike interval curves: What do they tell use about the brain?
Christodoulou, Chris C.; Bugmann, G. (2001)A number of models have been produced recently to explain the high variability of natural spike trains (Softky and Koch, J. Neurosci. 13 (1) (1993) 334). These models use a range of different biological mechanisms including ...
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A comparative study on filtering protein secondary structure prediction
Kountouris, P.; Agathocleous, Michalis; Promponas, Vasilis J.; Christodoulou, Georgia; Hadjicostas, S.; Vassiliades, Vassilis; Christodoulou, Chris C. (2012)Filtering of Protein Secondary Structure Prediction (PSSP) aims to provide physicochemically realistic results, while it usually improves the predictive performance. We performed a comparative study on this challenging ...
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Comparing Different Classifiers for Automatic Age Estimation
Lanitis, A.; Draganova, C.; Christodoulou, Chris C. (2004)We describe a quantitative evaluation of the performance of different classifiers in the task of automatic age estimation. In this context, we generate a statistical model of facial appearance, which is subsequently used ...
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Conference Object
A comparison of color correction algorithms for endoscopic cameras
Constantinou, Ioannis P.; Neofytou, Marios S.; Tanos, Vasilios; Pattichis, Marios S.; Christodoulou, Chris C.; Pattichis, Constantinos S. (2013)Quantitative color tissue analysis in endoscopy examinations requires color standardization procedures to be applied, so as to enable compatibility among computer aided diagnosis application from different endoscopy labs. ...
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Distinguishing the causes of firing with themembrane potential slope
Koutsou, Achilleas; Christodoulou, Chris C.; Bugmann, G.; Kanev, J. (2012)In this letter, we aim to measure the relative contribution of coincidence detection and temporal integration to the firing of spikes of a simple neuron model. To this end, we develop a method to infer the degree of synchrony ...
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Does high firing irregularity enhance learning?
Christodoulou, Chris C.; Cleanthous, A. (2011)In this note, we demonstrate that the high firing irregularity produced by the leaky integrate-and-fire neuron with the partial somatic reset mechanism, which has been shown to be the most likely candidate to reflect the ...
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Editorial
Lucas, P.; Rospars, J. -P; Christodoulou, Chris C. (2015)
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An extension of a hierarchical reinforcement learning algorithm for multiagent settings
Lambrou, Ioannis; Vassiliades, Vassilis; Christodoulou, Chris C. (2012)This paper compares and investigates single-agent reinforcement learning (RL) algorithms on the simple and an extended taxi problem domain, and multiagent RL algorithms on a multiagent extension of the simple taxi problem ...
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Foreword
Christodoulou, Chris C.; Lansky, P.; Rospars, J. -P (2012)
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Foreword
Lánský, P.; Rospars, J. -P; Christodoulou, Chris C. (2013)
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Guest Editorial introduction to the special issue on Biomedical Signal Processing and Analysis selected papers from ITAB 2009
Pattichis, Constantinos S.; Bamidis, Panagiotis D.; Christodoulou, Chris C.; Kyriacou, Efthyvoulos C.; Mitsis, Georgios D.; Pattichis, Marios S.; Pitris, Constantinos (2011)
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Inkjet printing processing conditions for bulk-heterojunction solar cells using two high-performing conjugated polymer donors
Hermerschmidt, F.; Papagiorgis, Panagiotis; Savva, Achilleas; Christodoulou, Chris C.; Itskos, Grigorios; Choulis, Stelios A. (2014)We report the processing conditions for inkjet-printed active layers of organic photovoltaic (OPV) devices comprising bulk-heterojunction blends of the low bandgap conjugated polymer poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b: ...
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Conference Object
An integrated teleconsultation system for the evaluation of the risk of stroke
Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Christodoulou, Chris C.; Karaolis, Minas A.; Nicolaïdes, Andrew N. (Plymouth University, 2005)This paper describes the design and development of an integrated teleconsultation system for the estimation of the annual incidence of stroke related to carotid atherosclerotic plaque and the detection of high risk and low ...