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Nordic Rheology Conference 2002
The Investigation of Hot Workability of AA 6063/SiC Composites with Different SiC Particulate Volume Fraction
The Society’s Site: Time period September 2002 to February 2003
The Fifth World Congress on Computational Mechanics
Synthesis and aqueous phase behavior of thermoresponsive biodegradable poly(D,L-3-methylglycolide)-block-poly(ethylene glycol)-block-poly(D,L-3-methylglycolide) triblock copolymers
Novel biodegradable thermosensitive triblock copolymers of poly(D,L-3-methylglycolide)-block-poly(ethylene glycol)-block-poly(D,L-3-methylglycolide) (PMG-PEG-PMG) have been synthesized. Ring-opening polymerization of D,L-3-methyl-glycolide (MG) initiated with poly(ethylene glycol) (PEG) and Ca[N(SiMe3)2]2(THF)2 provid…
Computerised Glow Curve Deconvolution using General and Mixed Order Kinetics
Some accurate glow curve fitting functions for general and mixed order kinetics glow peaks are proposed and discussed. These mathematical expressions are used together with peak search and non-linear minimisation algorithms in order to provide a fast glow curve deconvolution for those materials which cannot be well fi…
On geological interpretations of crystal size distributions: Constant vs. proportionate growth
Geological interpretations of crystal size distributions (CSDs) depend on understanding the crystal growth laws that generated the distributions. Most descriptions of crystal growth, including a population-balance modeling equation that is widely used in petrology, assume that crystal growth rates at any particular ti…
The influence of oxygen deficiency on the magnetic and electric properties of La0.70Ba0.30MnO3 −γ (0≤γ≤0.30) manganite with a perovskite structure
The crystal structure and the magnetic and electric properties of La0.70Ba0.30MnO3 − γ manganite (0≤γ≤0.30) with a perovskite structure were studied experimentally depending on the concentration of oxygen vacancies. The stoichiometric La0.70Ba0.30MnO3 compound (γ = 0) had cubic unit cell symmetry, which did not change…
Tissue Reaction to Polypyrrole-Coated Polyester Fabrics: An in Vivo Study in Rats
Electrically conductive polypyrrole is very attractive for tissue engineering because of its potential to modulate cellular activities through electrical stimulation. However, its in vivo behaviors have not been fully studied. This paper investigates the in vivo biocompatibility and biostability of PPy-coated polyeste…
Freshwater Red Algae of the World
The Journal of Phycology was founded in 1965 by the Phycological Society of America. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, taxonomist, geneticist, and biochemist. The…
Conductive polymers as a new type of thermoelectric material
Thermoelectric properties were investigated for the films of electrically conductive doped polyanilines. The thermoelectric performance, evaluated by thermoelectric figure-of-merit (ZT = T (S2 σ) / κ), of various protonic acid-doped polyaniline bulk films was found to depend on the electrical conductivity σ of the fil…
Suppression of Quantum Phase Interference in Molecular Magnets Fe₈ with Dipolar-Dipolar Interaction
Renormalized tunnel splitting with a finite distribution in the biaxial spin model for molecular magnets is obtained by taking into account the dipolar interaction of enviromental spins. Oscillation of the resonant tunnel splitting with a transverse magnetic field along the hard axis is smeared by the finite distribut…
Extensional rupture of model non-Newtonian fluid filaments
We present molecular dynamics computer simulations of filaments of model non-Newtonian liquid stretched in a uniaxial deformation to the point of breaking. The liquid consists of Lennard-Jones monomers bound into chains of 100 monomers by nonlinear springs, and several different constant velocity and constant strain r…
Magnetic shape-memory effects in La2-xSrxCuO4 crystals
The magnetic field affects the motion of electrons and the orientation of spins in solids, but it is believed to have little impact on the crystal structure. This common perception has been challenged recently by ferromagnetic shape-memory alloys, where the spin-lattice coupling is so strong that crystallographic axes…
Disorder-Induced Vibrational Localization
The vibrational equivalent of the Anderson tight-binding Hamiltonian has been studied, with particular focus on the properties of the eigenstates at the transition from extended to localized states. The critical energy has been found approximately for several degrees of force-constant disorder using system-size scalin…
Metastable Random Field Ising model with exchange enhancement: a simple model for Exchange Bias
We present a simple model that allows hysteresis loops with exchange bias to be reproduced. The model is a modification of the T=0 random field Ising model driven by an external field and with synchronous local relaxation dynamics. The main novelty of the model is that a certain fraction f of the exchange constants be…
Quantification of oxide film thickness at the surface of aluminium using XPS
Abstract Oxide films grown anodically at the surface of superpure aluminium are used as standards to assess the accuracy of the thickness ( d XPS ) determined using the Beer–Lambert treatment of the Al 2p metal and oxide peak intensities. For the fitting conditions employed, the value of d XPS is found to be very clos…
Intergranular fracture in nanocrystalline metals
Crack propagation studies in nanocrystalline Ni samples with mean grain sizes ranging from 5 to 12 nm are reported using atomistic simulations. For all grain sizes pure intergranular fracture is observed. Intergranular fracture is shown to proceed by the coalescence of microvoids formed at the grain boundaries ahead o…
Characterization of High Temperature Creep Properties in Recrystallized 12Cr-ODS Ferritic Steel Claddings
The high temperature strengthening mechanism of previously manufactured 12Cr-ODS ferritic steel claddings was clarified. In the recrystallized 12Cr-2W-0.3Ti-0.24Y2O3-ODS ferritic steel cladding, αY2TiO5 type complex oxide formation was responsible for the drastic reduction of oxide particle size and the resulting shor…