Πλοήγηση ανά Θέμα "DYNAMICS"

The application of complex network time series analysis in turbulent heated jets

Charakopoulos, A. K.; Karakasidis, T. E.; Papanicolaou, P. N.; Liakopoulos, A. (2014)

In the present study, we applied the methodology of the complex network-based time series analysis to experimental temperature time series from a vertical turbulent heated jet. More specifically, we approach the hydrodynamic ...

Assessing marine ecosystem response to nutrient inputs

George, T.; George, P.; Costas, D.; Theodorou, A. (2001)

The response of the Pagasitikos Gulf to enrichment caused by run-off fertilizers and the development and evolution of harmful algal blooms is investigated through ecosystem modelling. A standard generic complex model has ...

Assessment of genetic structure of Greek brown hare (Lepus europaeus) populations based on variation in random amplified polymorphic DNA (RAPD)

Mamuris, Z.; Sfougaris, A. I.; Stamatis, C.; Suchentrunk, F. (2002)

The RAPD method was used to assess the genetic differentiation of brown hare (Lepus europaeus) populations from Central Greece. Greek wild populations were compared with samples from Austria, Poland, Germany, France, and ...

Assessment of pressures and impacts on surface water bodies of the Mediterranean. Case study: Pamvotis Lake, Greece

Alexakis, D.; Kagalou, I.; Tsakiris, G. (2013)

The aim of the study presented in this article is to assess the ecological status of a surface water body in the Mediterranean using the methodological approach of Driver-Pressure-State-Impact-Response. Based on this ...

Backorder penalty cost coefficient "b": What could it be?

Liberopoulos, G.; Tsikis, I.; Delikouras, S. (2010)

The classical economic order quantity (EOQ) model with planned penalized backorders (PB) relies on postulating a value for the backorder penalty cost coefficient, b, which is supposed to reflect the intangible adverse ...

Bound-state formation in interfacial turbulence: direct numerical simulations and theory

Pradas, M.; Kalliadasis, S.; Nguyen, P. K.; Bontozoglou, V. (2013)

We examine pulse interaction and bound-state formation in interfacial turbulence using the problem of a falling liquid film as a model system. We perform direct numerical simulations (DNSs) of the full Navier-Stokes equations ...

Boundary-driven nonequilibrium gas flow in a grooved channel via kinetic theory

Naris, S.; Valougeorgis, D. (2007)

The nonequilibrium flow of a gas in a two-dimensional grooved channel, due to the motion of the wall of the channel, is investigated based on kinetic theory. The presence of the rectangular grooves that are placed periodically ...

Bubbles growing in supersaturated solutions at reduced gravity

Divinis, N.; Karapantsios, T. D.; Kostoglou, M.; Panoutsos, C. S.; Bontozoglou, V.; Michels, A. C.; Sneep, M. C.; De Bruijn, R.; Lotz, H. (2004)

This work investigates bubbles growing in a liquid saturated with a dissolved gas when its temperature is locally raised above its saturation value, yet below boiling. Local supersaturation is realized by giving heat pulses ...

Cannabinoid 1 receptor-dependent transactivation of fibroblast growth factor receptor 1 emanates from lipid rafts and amplifies extracellular signal-regulated kinase 1/2 activation in embryonic cortical neurons

Asimaki, O.; Leondaritis, G.; Lois, G.; Sakellaridis, N.; Mangoura, D. (2011)

G-protein coupled receptors may mediate their effects on neuronal growth and differentiation through activation of extracellular signal-regulated kinases 1/2 (ERK1/2), often elicited by transactivation of growth factor ...

A comparison of alternative unit root tests

Halkos, G. E.; Kevork, I. S. (2005)

In this paper we evaluate the performance of three methods for testing the existence of a unit root in a time series, when the models under consideration in the null hypothesis do not display autocorrelation in the error ...

Conditional symmetries and the canonical quantization of constrained minisuperspace actions: The Schwarzschild case

Christodoulakis, T.; Dimakis, N.; Terzis, P. A.; Doulis, G.; Grammenos, T.; Melas, E.; Spanou, A. (2013)

A conditional symmetry is defined, in the phase space of a quadratic in velocities constrained action, as a simultaneous. conformal symmetry of the supermetric and the superpotential. Iris proven that such a symmetry ...

Deforestation processes in Greece: A spatial analysis by using an ordinal regression model

Minetos, D.; Polyzos, S. (2010)

Forest land use changes in Greece have been the outcome of combining forces with mostly economic and institutional origin. Interactions between the major land uses have diachronically resulted in spatial patterns of great ...

Design optimization of quarter-car models with passive and semi-active suspensions under random road excitation

Verros, G.; Natsiavas, S.; Papadimitriou, C. (2005)

A methodology is presented for optimizing the suspension damping and stiffness parameters of nonlinear quarter-car models subjected to random road excitation. The investigation starts with car models involving passive ...

Ecosystem modelling: Towards the development of a management tool for a marine coastal system part-II, ecosystem processes and biogeochemical fluxes

Petihakis, G.; Triantafyllou, G.; Korres, G.; Tsiaras, K.; Theodorou, A. (2012)

Pagasitikos gulf is a semi-enclosed basin highly influenced both by anthropogenic activities (inflow of nutrients at the north and west parts) as well as by water exchange between the gulf and the Aegean Sea at its south ...

The effects of muscle damage following eccentric exercise on gait biomechanics

Paschalis, V.; Giakas, G.; Baltzopoulos, V.; Jamurtas, A. Z.; Theoharis, V.; Kotzamanidis, C.; Koutedakis, Y. (2007)

To examine the effects of knee extensors muscle damage on walking and running biomechanics in healthy males. Muscle damage was caused by 60 (6 x 10) maximal eccentric knee flexions of both legs, selected in a random order, ...

Effects of Pea Cultivation as Cover Crop on Nitrogen-Use Efficiency and Nitrogen Uptake by Subsequent Maize and Sunflower Crops in a Sandy Soil in Central Greece

Skoufogianni, E.; Danalatos, N. G.; Dimoyiannis, D.; Efthimiadis, P. (2013)

The long-term positive effects of cropping systems involving rotation with cover crops on soil properties and the environment are well recognized. The present work concerns a 3-year field experiment focusing on two cropping ...