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Institution

University of Cyprus

EducationNicosia, Cyprus
About: University of Cyprus is a education organization based out in Nicosia, Cyprus. It is known for research contribution in the topics: Large Hadron Collider & Standard Model. The organization has 3624 authors who have published 15157 publications receiving 412135 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors examine how causality inference and forecasting within a bivariate VAR are affected by the omission of a third variable, w(t), which causes none, one, and both variables in the bivariate system.
Abstract: In this paper we examine how causality inference and forecasting within a bivariate VAR, consisting of y(t) and x(t), are affected by the omission of a third variable, w(t), which causes (a) none, (b) one, and (c) both variables in the bivariate system. We also derive conditions under which causality inference and forecasting are invariant to the selection of a bivariate or a trivariate model. The most general condition for the invariance of both causality and forecasting to model selection is shown to require the omitted variable not to cause any of the variables in the bivariate system, although it allows the omitted variable to be caused by the other two. We also show that the conditions for one-way causality inference to be invariant to model selection are not sufficient to ensure that forecasting will also be invariant to the model selected. Finally, we present a numerical illustration of the potential losses, in terms of the variance of the forecast, as a function of the forecast horizon and for alternative parameter values—they can be rather large, as the omission of a variable can make the incomplete model unstable. © 1997 John Wiley & Sons, Ltd.

119 citations

Journal ArticleDOI
TL;DR: The results revealed that 10 mg L(-1) of sodium persulfate (SPS) can result in rapid and complete antibiotic degradation within 90 min of irradiation, while ERY decay exhibited a pseudo-first-order kinetics pattern under the different experimental conditions applied.

119 citations

Journal ArticleDOI
TL;DR: In this paper, the main transformation products (TPs) resulting from the degradation of diclofenac (DCF) and ibuprofen (IBP) during the application of various advanced oxidation processes in aqueous matrices were tentatively identified.
Abstract: Liquid chromatography time-of-flight mass spectrometry (UPLC/ESI–QToF–MS) was used for the elucidation of the main transformation products (TPs) resulting from the degradation of diclofenac (DCF) and ibuprofen (IBP) during the application of various advanced oxidation processes in aqueous matrices. The examined processes were TiO2 photocatalysis driven by UV-A or simulated solar irradiation, sonolysis, and UV-A photocatalysis integrated with ultrasound irradiation (sonophotocatalysis). A comparison between the applied treatment processes was performed with respect to the substrates first-order kinetic rate constant. When compared with sonolysis and UV-A photocatalysis, a higher degradation rate was observed for sonophotocatalysis in the presence of 500 mg L−1 TiO2. Seven TPs of IBP and ten TPs of DCF under UV-A and simulated solar irradiation photocatalysis and sonophotocatalysis, formed by consecutive attack of hydroxyl radicals (HO•) in concomitance with the degradation of the primary compounds, were tentatively identified. Overall, no differences were observed in the nature of TPs formed for each substrate among the experiments performed, indicating the involvement of similar reaction mechanisms. The degradation pathway of IBP includes mainly decarboxylation, demethylation and hydroxylation reactions, while the oxidation of DCF, mainly proceeded by oxidation and hydroxylation reactions between chloroaniline and phenylacetic acid. An important observation made during the experiments was that the hydroxylated species (1′-OH-IBP; 2′-OH-IBP; 4′-OH-DCF; 5′-OH-DCF) remained in the solution until 120 min. Finally, the results demonstrated the capacity of the sonophotocatalysis to reduce the initial toxicity of IBP and DCF aqueous solutions against the water flea Daphnia magna yielding 20% and 40% immobilization, respectively, at the end of the treatment.

119 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated outdoor urban ventilation in a real complex urban area by introducing a new ventilation indicator, the "air delay", and performed computational fluid dynamics (CFD) simulations.

118 citations

Book
21 Jul 2008
TL;DR: The goal for this book is to introduce the theoretical background, the algorithmic steps, and the MATLAB™ code for the following group of despeckle filters: linear filtering, nonlinear filtering, anisotropic diffusion filtering and wavelet filtering.
Abstract: It is well-known that speckle is a multiplicative noise that degrades image quality and the visual evaluation in ultrasound imaging. This necessitates the need for robust despeckling techniques for both routine clinical practice and teleconsultation. The goal for this book is to introduce the theoretical background (equations), the algorithmic steps, and the MATLAB™ code for the following group of despeckle filters: linear filtering, nonlinear filtering, anisotropic diffusion filtering and wavelet filtering. The book proposes a comparative evaluation framework of these despeckle filters based on texture analysis, image quality evaluation metrics, and visual evaluation by medical experts, in the assessment of cardiovascular ultrasound images recorded from the carotid artery. The results of our work presented in this book, suggest that the linear local statistics filter DsFlsmv, gave the best performance, followed by the nonlinear geometric filter DsFgf4d, and the linear homogeneous mask area filte...

118 citations


Authors

Showing all 3715 results

NameH-indexPapersCitations
Luca Lista1402044110645
Peter Wittich1391646102731
Stefano Giagu1391651101569
Norbert Perrimon13861073505
Pierluigi Paolucci1381965105050
Kreso Kadija135127095988
Daniel Thomas13484684224
Julia Thom132144192288
Alberto Aloisio131135687979
Panos A Razis130128790704
Jehad Mousa130122686564
Alexandros Attikis128113677259
Fotios Ptochos128103681425
Charalambos Nicolaou128115283886
Halil Saka128113777106
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202342
2022126
20211,224
20201,200
20191,044
20181,009