Browsing by Author "Liakopoulos, A."
Now showing items 21-39 of 39
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Identification and characterization of genetic structures coding for carbapenemases in enterobacteria from Central Greece
Mavroidi, A.; Liakopoulos, A.; Sarrou, S.; Miriagou, V.; Petinaki, E. (2015)The dissemination of carbapenemases among different species of Enterobacteriaceae was investigated in the University Hospital of Larissa, Central Greece. The presence of the isoform (Tn4401a) of the transponson carrying ... -
Mesoscopic simulation of fluid flow in periodically grooved microchannels
Kasiteropoulou, D.; Karakasidis, T. E.; Liakopoulos, A. (2013)In the present work we investigate the effect of wall protrusions on flows in microchannels using Dissipative Particle Dynamics (DPD). Protrusions are introduced by periodically placing rectangular protruding elements on ... -
The migration of the UTHBAL hydrologic model into OpenMI
Loukas, A.; Kokkinos, K.; Vasiliades, L.; Liakopoulos, A. (2008)This paper deals with the implementation and the migration into OpenMI of a monthly conceptual hydrological model, called UTHBAL. The model has been developed by Loukas et al. [2003, 2007] and now is implemented under the ... -
Molecular characterization of Streptococcus agalactiae from vaginal colonization and neonatal infections: a 4-year multicenter study in Greece
Liakopoulos, A.; Mavroidi, A.; Vourli, S.; Panopoulou, M.; Zachariadou, L.; Chatzipanagiotou, S.; Spiliopoulou, I.; Zerva, L.; Petinaki, E. (2014)A multicenter collection comprising of 171 Streptococcus agalactiae isolates from pregnant women recovered between 2007 and 2010 and 46 from unmatched neonates with invasive infections was subjected to antimicrobial ... -
Molecular dynamics simulation on flows in nano-ribbed and nano-grooved channels
Sofos, F.; Karakasidis, T. E.; Giannakopoulos, A. E.; Liakopoulos, A. (2015)We present molecular dynamics simulation results on fluid and transport properties for nanochannel flows. The upper channel wall is constructed from periodic roughness elements and flows are simulated both in longitudinal ... -
Nonlinear time series analysis and clustering for jet axis identification in vertical turbulent heated jets
Charakopoulos, A. K.; Karakasidis, T. E.; Papanicolaou, P. N.; Liakopoulos, A. (2014)In the present work we approach the hydrodynamic problem of discriminating the state of the turbulent fluid region as a function of the distance from the axis of a turbulent jet axis. More specifically, we analyzed temperature ... -
Parameters Affecting Slip Length at the Nanoscale
Sofas, F.; Karakasidis, T. E.; Liakopoulos, A. (2013)We investigate liquid flows in various nanochannels and present the effect of all physical parameters affecting slip length at the boundary using molecular dynamics simulations. Our computational model shows that slip ... -
A quasi-continuum multi-scale theory for self-diffusion and fluid ordering in nanochannel flows
Giannakopoulos, A. E.; Sofos, F.; Karakasidis, T. E.; Liakopoulos, A. (2014)We present a quasi-continuum self-diffusion theory that can capture the ordering effects and the density variations that are predicted by non-equilibrium molecular dynamics (NEMD) in nanochannel flows. A number of properties ... -
RECURRENCE QUANTIFICATION ANALYSIS OF TEMPERATURE FLUCTUATIONS IN A HORIZONTAL ROUND HEATED TURBULENT JET
Karakasidis, T. E.; Liakopoulos, A.; Fragkou, A.; Papanicolaou, P. (2009)We present an analysis of temperature fluctuations in a horizontal round heated turbulent jet. Instantaneous temperature time series were recorded at several points along a horizontal line in the plane of symmetry of the ... -
Risk factors for enterococcal infection and colonization by vancomycin-resistant enterococci in critically ill patients
Papadimitriou-Olivgeris, M.; Drougka, E.; Fligou, F.; Kolonitsiou, F.; Liakopoulos, A.; Dodou, V.; Anastassiou, E. D.; Petinaki, E.; Marangos, M.; Filos, K. S.; Spiliopoulou, I. (2014)Vancomycin-Resistant Enterococci (VRE) are important causes of Intensive Care Unit (ICU) infections. Our goal was to identify the prevalence and risk factors for VRE colonization upon ICU admission and during ICU stay, as ... -
Spread of Multidrug-Resistant Pseudomonas aeruginosa Clones in a University Hospital
Koutsogiannou, M.; Drougka, E.; Liakopoulos, A.; Jelastopulu, E.; Petinaki, E.; Anastassiou, E. D.; Spiliopoulou, I.; Christofidou, M. (2013)An outbreak of multidrug-resistant Pseudomonas aeruginosa (MDRPA) infections in a university hospital is described. Phenotypic and genotypic analysis of 240 isolates revealed that 152 patients, mainly in the intensive care ... -
Successful control of a neonatal outbreak caused mainly by ST20 multidrug-resistant SHV-5-producing Klebsiella pneumoniae, Greece
Mavroidi, A.; Liakopoulos, A.; Gounaris, A.; Goudesidou, M.; Gaitana, K.; Miriagou, V.; Petinaki, E. (2014)Background: Extended spectrum beta-lactamase-producing Klebsiella pneumoniae (ESBL-Kp) infection can cause significant morbidity and mortality in neonates. We investigated a nosocomial ESBL-Kp outbreak in a neonatal intensive ... -
Surface wettability effects on flow in rough wall nanochannels
Sofos, F.; Karakasidis, T. E.; Liakopoulos, A. (2012)The effect of rough-wall/fluid interaction on flow in nanochannels is investigated by NEMD. Hydrophobic and hydrophilic surfaces are studied for walls with nearly atomic-size rectangular protrusions and cavities. Our NEMD ... -
System dynamics revealed by recurrence quantification analysis: Application to molecular dynamics simulations
Karakasidis, T. E.; Fragkou, A.; Liakopoulos, A. (2007)The present work examines the applicability and efficacy of recurrence plots and recurrence quantification analysis in interpreting statistical-mechanics-based simulations of classical fluids and solids. We analyze temperature ... -
A T2504A mutation in the 23S rRNA gene responsible for high-level resistance to linezolid of Staphylococcus epidermidis
Liakopoulos, A.; Neocleous, C.; Klapsa, D.; Kanellopoulou, M.; Spiliopoulou, I.; Mathiopoulos, K. D.; Papafrangas, E.; Petinaki, E. (2009) -
Three-dimensional convective cooling in a vertical channel with flush-mounted heat sources
Gunes, H.; Liakopoulos, A. (2003)Three-dimensional free convection in a vertical channel with spatially periodic, flush-mounted heat sources is investigated by a spectral element method. All numerical solutions are obtained using a time-accurate ... -
Transport properties of liquid argon in krypton nanochannels: Anisotropy and non-homogeneity introduced by the solid walls
Sofos, F.; Karakasidis, T.; Liakopoulos, A. (2009)In this work we calculate the transport properties of liquid argon flowing through a nanochannel formed by krypton walls. Non-equilibrium Molecular dynamics (NEMD) simulations are performed assuming flow conditions ... -
Unified description of size effects of transport properties of liquids flowing in nanochannels
Giannakopoulos, A. E.; Sofos, F.; Karakasidis, T. E.; Liakopoulos, A. (2012)The present work connects transport properties of simple fluids flowing in nanochannels: the diffusion coefficient, the shear viscosity and the thermal conductivity. We used non-equilibrium molecular dynamics (NEMD) ... -
Vortex buffeting of aircraft tail: Interpretation via proper orthogonal decomposition
Kim, Y.; Rockwell, D.; Liakopoulos, A. (2005)The proper-orthogonal-decomposition method is applied to particle-image-velocimetry (PIV) data to extract the most energetic flow structures of vortex-tail interaction. The reconstructed flowfields, in conjunction with ...