Browsing by Subject "Anisotropy"
Now showing items 120 of 23

Article
Anisotropy of the resistivity in the ab plane of a superconducting YBa2Cu3O7δ single crystal
(1996)We have measured the inplane longitudinal resistivities pa and pb as functions of temperature and magnetic field. The measurements were all made on the same detwinned single crystal of YBa2Cu3O7δ (YBCO). Defining Tc to ...

Article
Dynamic responses in nanocomposite hydrogels
(2006)The shear response of a series of polymerclay gels has been investigated by means of rheology and smallangle neutron scattering (SANS). The gels have the same composition by mass but different polymer molecular weights ...

Conference Object
Dynamic responses in polymerclay gels
(2005)The shear orientation of three polymerclay gels has been investigated by means of small angle neutron scattering (SANS). The gels have the same polymer and clay concentrations but different polymer molecular weight. The ...

Article
Femtosecond UV pump/nearIR probe studies of the solventdependent excitedstate decay dynamics of chlorine dioxide
(2001)The excitedstate decay and geminaterecombination dynamics of chlorine dioxide (OClO) are investigated using UV pump/nearIR probe spectroscopy. Experiments are performed with 200fs time resolution on OClO dissolved in ...

Article
Highly anisotropic crystal growth and thermoelectric properties of K 2Bi 8xSb xSe 13 solid solutions: Band gap anomaly at low x
(2002)The thermoelectric properties of solid solutions of the type βK 2Bi 8xSb xSe 13 (0<x<8) were studied with respect to thermal behavior, band gap variation, and charge transport properties as a function of x. At x values ...

Article
Identification and reconstruction of a small leak zone in a pipe by a spectral element method
(2006)This paper deals with the identification of a zone permitting fluid to leak out of a drain. Using the analogy with crack identification by boundary measurements, we give uniqueness and stability results and we propose an ...

Article
The method of fundamental solutions for layered elastic materials
(2001)In this paper, we investigate the application of the method of fundamental solutions to twodimensional elasticity problems in isotropic and anisotropic single materials and bimaterials. A domain decomposition technique ...

Article
Multilevel characterizations of anisotropic function spaces
(2005)We present a general method for extending decomposition systems of L 2(ℝd) to decomposition systems for the anisotropic TriebelLizorkin and Besov spaces, Fp,qα,s and Bp,qα,s, respectively, for the full range of the indexes. ...

Article
Multiscale modelling of solid tumour growth: the effect of collagen micromechanics
(2016)Here we introduce a model of solid tumour growth coupled with a multiscale biomechanical description of the tumour microenvironment, which facilitates the explicit simulation of fibre–fibre and tumour–fibre interactions. ...

Article
Multiscale, structurebased modeling for the elastic mechanical behavior of arterial walls
(2007)Passive elastic behavior of arterial wall remains difficult to model. Although phenomenological and structural models exist, the question of how the threedimensional network structure of the collagen in the artery determines ...

Conference Object
On the optical properties of thermoelectric alkali metal chalcogenide compounds
(Affiliation: Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceAffiliation: Department of Chemistry, Michigan State University, East Lansing, MI 48824, United StatesAffiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 1678 Nicosia, CyprusCorrespondence Address: Hatzikraniotis, E.Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece, 2006)Solid solutions of K2Bi8xSbxSe 13 is an interesting series of complex bismuthchalcogenide compounds, which are attractive for thermoelectric investigations. The highly anisotropic structure in these compounds results in ...

Article
Optical probing of anisotropic heat transport in the quantum spin ladder Ca 9La 5Cu 24O 41
(2012)A transient thermal imaging technique is used to monitor heat diffusion at the surface of the antiferromagnetic spin ladder material Ca 9La 5Cu 24O 41. This material shows highly anisotropic thermal conductivity due to a ...

Article
Rapid shear of initially anisotropic turbulence in a rotating frame?
(2007)In the present study, we investigate, using inviscid rapid distortion theory, the evolution of sheared turbulence in a rotating frame as a function of the rotation rate (including stable, transitional, and unstable regimes), ...

Article
Representing anisotropy of twopoint secondorder turbulence velocity correlations using structure tensors
(2008)A locally homogeneous representation for the twopoint, secondorder turbulent velocity fluctuation Rij(x,r) = 〈u′i(x)u′i(x+r)〉 is formulated in terms of three linearly independent structure tensors [Kassinos et al., J. ...

Article
A simplified structurebased model using standard turbulence scale equations: computation of rotating wallbounded flows
(2006)Two linear eddyviscosity models, the v2f and kω models, have been combined with an algebraic structurebased algorithm for the evaluation of the Reynolds stresses. This closure was originally designed as an integral ...

Article
A spectral mortar element discretization of the Poisson equation with mixed boundary conditions
(2007)In this paper, we study a spectral mortar element discretization of the Poisson equation on a square subject to mixed boundary conditions of Dirichlet and Neumann type. We carry out the numerical analysis of the method and ...

Article
Statistical measures of structural anisotropy in MHD turbulence subjected to mean shear and frame rotation
(2006)We consider homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field while being sheared in fixed and rotating frames. We take both the framerotation axis and the applied magnetic ...

Conference Object
Structure anisotropy in MHD turbulence subjected to mean shear and frame rotation
(Affiliation: Dept. of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, CyprusAffiliation: Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United StatesAffiliation: Center for Turbulence Research, NASA Ames Research Center, United StatesCorrespondence Address: Kassinos, S.C.Dept. of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprusemail: kassinos@ucy.ac.cy, 2005)We consider homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field while being sheared in fixed and rotating frames. We take both the framerotation axis and the applied magnetic ...

Article
Symmetry of differential optical responses of normal and superconducting phases in singlecrystal YBCO
(1995)We measured differential optical reflectivity (DOR) of YBCO single domains. DOR measurements reject the temperature independent bulk reflectivity and reveal dR dT. These measurements detect the superconducting transition, ...

Conference Object
Thermal conductivity measurements of anisotropic bulk samples using the 3ω method
(Affiliation: Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, 1678, CyprusAffiliation: Materials Science and Technology Department, University of Crete, P.O. Box 2208, Heraklion Crete 710 03, GreeceCorrespondence Address: Athanasopoulos, G. I.Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, 1678, Cyprus, 2010)The 3ω method has been applied to measure the anisotropic thermal conductivity of single crystals of SiO2 (quartz) and La 14yCayCu24O41 (y = 9 and 10). A twodimensional heat conduction model along with properly oriented ...