Browsing by Author "Nicolaïdes, Andrew N."
Now showing items 21-40 of 97
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Article
Computerized texture analysis of carotid plaque ultrasonic images can identify unstable plaques associated with ipsilateral neurological symptoms
Kakkos, Stavros K.; Nicolaïdes, Andrew N.; Kyriacou, Efthyvoulos C.; Daskalopoulou, Stella Styliani; Sabetai, Michael; Pattichis, Constantinos S.; Geroulakos, George; Griffin, Maura B.; Thomas, Dominique (2011)We estimated the value of objective, computerized texture analysis of ultrasonic images in distinguishing carotid plaques associated with neurological ipsilateral symptoms (amaurosis fugax [AmF
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Article
Connectivity Effects in Isomeric Naphthalenedinitrenes
Serwinski, P. R.; Walton, R.; Sanborn, J. A.; Lahti, P. M.; Enyo, T.; Miura, D.; Tomioka, H.; Nicolaïdes, Andrew N. (2001)(Matrix Presented) UV-vis, FTIR, and ESR spectroscopic studies were carried out on samples of 1,4- and 1,5-naphthalenediazide that were photolyzed at cryogenic temperatures in argon and frozen solvent matrices. Mononitrenes ...
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Conference Object
De-speckle filtering in ultrasound imaging of the carotid artery
Christodoulou, Christodoulos I.; Loizou, Christos P.; Pattichis, Constantinos S.; Pantzaris, Marios C.; Kyriacou, Efthyvoulos C.; Pattichis, Marios S.; Schizas, Christos N.; Nicolaïdes, Andrew N. (2002)The main objective of this paper is to evaluate the classification performance of de-speckle filtering on ultrasound imaging of the carotid atherosclerotic plaque. The following procedure was investigated on 230 images ...
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Article
Despeckle filtering for multiscale amplitude-modulation frequency-modulation (AM-FM) texture analysis of ultrasound images of the intima-media complex
Loizou, Christos P.; Murray, V.; Pattichis, Marios S.; Pantzaris, Marios C.; Nicolaïdes, Andrew N.; Pattichis, Constantinos S. (2014)The intima-media thickness (IMT) of the common carotid artery (CCA) is widely used as an early indicator of cardiovascular disease (CVD). Typically, the IMT grows with age and this is used as a sign of increased risk of ...
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Article
Determination of the chirality of enantiomeric [16O, 17O, 18O] sulfate esters by IR spectroscopy: An ab initio evaluation
Nicolaïdes, Andrew N.; Radom, L. (1995)The calculated shifts accompanying oxygen isotopic substitution in the symmetric and antisymmetric >SO2 stretching vibrational frequencies of 2,2-dioxo-1,3,2-dioxothianes confirm the experimental finding that these shifts ...
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Conference Object
DFT study of optical properties of Pt-based complexes
Oprea, C. I.; Dumbravǎ, A.; Moscalu, F.; Nicolaïdes, Andrew N.; Gîrţu, M. A. (2010)We report Density Functional Theory (DFT) calculations providing the geometrical and electronic structures, as well as the vibrational and optical properties of the homologous series of Pt-pyramidalized olefin complexes ...
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Article
Dft study of the optical and vibration spectra of a series of platinum-olefin complexes
Oprea, C. I.; Moscalu, F.; Dumbravǎ, A.; Ioannou, Savvas; Nicolaïdes, Andrew N.; Gîrţu, M. A. (2011)We report Density Functional Theory calculations providing the vibrational and optical properties of the homologous series of Pt-pyramidalized olefin complexes (CH2)n-(C8H10)Pt(PX3)2, where X = H and Ph, and n = 0, 1, 2, ...
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Article
Direct observation and characterization of p-phenylenebisnitrene. A labile quinoidal diradical [11]
Nicolaïdes, Andrew N.; Tomioka, H.; Murata, S. (1998)
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Book Chapter
Distorted Alkenes
Lenoir, D.; Smith, P. J.; Liebman, J. F.; Nicolaïdes, Andrew N.; Johnson, R. P.; Konrad, K. M. (Wiley-VCH Verlag GmbH & Co. KGaA, 2009)
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Article
Effect of angle strain in conjugated cycloaikenylidenes. Singlet- triplet splitting of cyclobutenylidene and its ground-state intramolecular rearrangements
Nicolaïdes, Andrew N.; Matsushita, Takashi; Tomioka, H. (1999)The singlet and triplet states of cyclobutenylidene, cyclopenten-3- ylidene, cyclohexen,3-ylidene, and cyclohepten-3-ylidene and some of their isomers (cyclohexen-4-ylidene, cyclohepten-4-ylidene, and cyclohepten-5- ylidene) ...
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Article
Effect of halogen substitution on o-Phenylenebiscarbene
Nicolaïdes, Andrew N. (2005)The effect of halogen (F, Cl and Br) perturbation on the geometries and relative energies of five electronic states (one quintet, two triplets and two singlets) of o-phenylenebiscarbene (1-H) is examined computationally ...
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Article
Effect of halogen substitution on p-phenylenebiscarbene
Nicolaïdes, Andrew N. (2005)The effect of halogen (F, Cl, and Br) perturbation on the geometries and relative energies of five electronic states (one quintet, two triplets, and two singlets) of p-phenylenebiscarbene (1-H) was examined computationally ...
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Article
The Effect of Head Rotation on the Geometry and Hemodynamics of Healthy Vertebral Arteries
Aristokleous, Nicolas; Seimenis, Ioannis; Georgiou, Georgios C.; Nicolaïdes, Andrew N.; Anayiotos, Andreas S. (2015)The geometric and hemodynamic characteristics of the left and right vertebral arteries (LVA, RVA) of six healthy volunteers were investigated for the supine (S) and the prone position (P) a common sleeping posture with ...
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Article
Effect of zooming on texture features of ultrasonic images
Kakkos, Stavros K.; Nicolaïdes, Andrew N.; Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Geroulakos, George (2006)Background: Unstable carotid plaques on subjective, visual, assessment using B-mode ultrasound scanning appear as echolucent and heterogeneous. Although previous studies on computer assisted plaque characterisation have ...
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Article
The elusive benzocyclobutenylidene: A combined computational and experimental attempt
Nicolaïdes, Andrew N.; Matsushita, Takashi; Yonezawa, K.; Sawai, S.; Tomioka, H.; Stracener, L. L.; Hodges, J. A.; McMahon, R. J. (2001)Ab initio and density functional theory calculations predict that benzocyclobutenylidene (1) has a singlet ground state in contrast to the parent phenylcarbene and many other simply substituted arylcarbenes. Calculations ...
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Article
Erratum: Juxtaluminal hypoechoic area in ultrasonic images of carotid plaques and hemispheric symptoms (Journal of Vascular Surgery (2010) 52 (69-76))
Griffin, Maura B.; Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Bond, Dawn; Kakkos, Stavros K.; Sabetai, Michael; Geroulakos, George; Georgiou, Niki; Doré, C. J.; Nicolaïdes, Andrew N. (2010)
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Article
An evaluation of the performance of G2, G2(MP2) and G2(MP2, SVP) theories for heats of formation and heats of reaction in the case of 'large' hydrocarbons
Nicolaïdes, Andrew N.; Radom, L. (1996)Heats of formation for benzene, cyclohexane and other selected hydrocarbons, along with the heats of several isodesmic and isogyric reactions involving these species, are reported at the G2, G2(MP2) and G2(MP2, SVP) levels ...
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Article
Evaluation of the risk of stroke with confidence predictions based on ultrasound carotid image analysis
Lambrou, Alexandra; Papadopoulos, Harris; Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S.; Pattichis, Marios S.; Gammerman, A.; Nicolaïdes, Andrew N. (2012)Conformal Predictors (CPs) are Machine Learning algorithms that can provide reliable confidence measures to their predictions. In this work, we make use of the Conformal Prediction framework for the assessment of stroke ...
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Article
Evidence for the formation of the (Ph3P)2Pt complex of 3,7-dimethyltricyclo[3.3.0.03,7]oct-1(5)-ene, the most highly pyramidalized alkene in a homologous series. Isolation and X-ray structure of the product of the ethanol addition to the complex
Theophanous, F. A.; Tasiopoulos, Anastasios J.; Nicolaïdes, Andrew N.; Zhou, X.; Johnson, W. T. G.; Borden, W. T. (2006)Attempts to isolate the (Ph3P)2R complex of the highly pyramidalized olefin 3,7-dimethyltricyclo[3.3.0.03,7]oct-1(5)- ene 2 by generation of 2 in the presence of (Ph3P)2RC 2H4, followed by crystallization of the complex ...
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Conference Object
First and second order statistical texture features in carotid plaque image analysis: Preliminary results from ongoing research
Kyriacou, Efthyvoulos C.; Nicolaïdes, Andrew N.; Pattichis, Constantinos S.; Petroudi, Styliani; Pattichis, Marios S.; Griffin, Maura B.; Kakkos, Stavros K.; Makris, Gregory C. (2011)Carotid plaques have been associated with ipsilateral neurological symptoms. High-resolution ultrasound can provide information not only on the degree of carotid artery stenosis but also on the characteristics of the ...