All Outputs (1439)

Some demands on rapid prototypes used as master patterns in rapid tooling for injection moulding (2004)
Journal Article

Injection moulded components are finding vigorously increasing applications in numerous sectors. The flexibility of the process allows complex components to be manufactured in high volumes in fully automated environments. Associated with such compone... Read More about Some demands on rapid prototypes used as master patterns in rapid tooling for injection moulding.

Use of External Magnetic Fields to Reduce Reaction Times in an Immunoassay Using Micrometer-Sized Paramagnetic Particles as Labels (Magnetoimmunoassay) (2004)
Journal Article

The paper presents a rapid immunoassay system capable of quantifying analyte in complex biological and environmental media. Antibody-coated micrometer-sized paramagnetic particles are used as labels in an assay in which they bind quantitatively with... Read More about Use of External Magnetic Fields to Reduce Reaction Times in an Immunoassay Using Micrometer-Sized Paramagnetic Particles as Labels (Magnetoimmunoassay).

Self propagating high temperature synthesis of magnesium zinc ferrites (MgxZn1-xFe2O3): Thermal imaging and time resolved X-ray diffraction experiments (2004)
Journal Article

Spinel ferrites of the form Mg Zn Fe O (x = 0. 0.25, 0.50, 0.75, 1.00) were prepared by self-propagating high-temperature synthesis (SHS) from reactions of iron(III), zinc and magnesium oxides, iron powder and sodium perchlorate. The driving force... Read More about Self propagating high temperature synthesis of magnesium zinc ferrites (MgxZn1-xFe2O3): Thermal imaging and time resolved X-ray diffraction experiments.

Finite time extinction in nonlinear diffusion equations (2004)
Journal Article

We consider a class of degenerate diffusion equations where the nonlinearity is assumed to be singular (non-Lipschitz) at zero. It is shown that solutions with compactly supported initial data become identically zero in finite time. Such extinction f... Read More about Finite time extinction in nonlinear diffusion equations.

Building better nurse scheduling algorithms (2004)
Journal Article

The aim of this research is twofold: Firstly, to model and solve a complex nurse scheduling problem with an integer programming formulation and evolutionary algorithms. Secondly, to detail a novel statistical method of comparing and hence build bette... Read More about Building better nurse scheduling algorithms.

Trajectories of a DAE near a pseudo-equilibrium (2004)
Journal Article

We consider a class of differential-algebraic equations (DAEs) defined by analytic nonlinearities and study its singular solutions. The main assumption used is that the linearization of the DAE represents a Kronecker index-2 matrix pencil and that th... Read More about Trajectories of a DAE near a pseudo-equilibrium.

Hydride phase formation in carbon supported palladium nanoparticle electrodes investigated using in situ EXAFS and XRD (2003)
Journal Article

In situ EXAFS (extended X-ray absorption fine structure), in situ XRD (X-ray diffraction) and electrochemical studies have been used to investigate the palladium hydride phases of carbon supported palladium nanoparticles as a function of applied pote... Read More about Hydride phase formation in carbon supported palladium nanoparticle electrodes investigated using in situ EXAFS and XRD.

Hybrid heuristics for planning lot setups and sizes (2003)
Journal Article

The planning of a canning line at a drinks manufacturer is discussed and formulated as a mathematical programming model. Several alternative heuristic solution methods are developed, tested and compared on real data, illustrating the trade-offs betwe... Read More about Hybrid heuristics for planning lot setups and sizes.

Gas phase electrochemical detection of single latex particles (2003)
Journal Article

In this study we describe zero current potentiometric measurements in a gaseous flame electrolyte, for the detection of single latex particles. Combustion of polystyrene latex particles when added to a premixed hydrogen/oxygen/nitrogen flame, results... Read More about Gas phase electrochemical detection of single latex particles.

Exploring the psychosocial concerns of out-patients with disfiguring conditions (2003)
Journal Article

Objective: This study was undertaken to establish the extent and type of psychosocial need in outpatients attending for treatment for a variety of disfiguring conditions. Method: A total of 220 outpatients receiving treatment for burns, skin condit... Read More about Exploring the psychosocial concerns of out-patients with disfiguring conditions.

Optimization approximations for capacity constrained material requirements planning (2003)
Journal Article

This paper develops three mixed integer programming (MIP) models and solution methods to assist in identifying a capacity feasible master production schedule (MPS) in material requirements planning (MRP) systems. The initial exact model takes into ac... Read More about Optimization approximations for capacity constrained material requirements planning.

The analysis of a two-phase zone with condensation in a porous medium (2003)
Journal Article

The one-dimensional steady-state heat and mass transfer in a two-phase zone of a water-saturated porous medium is studied. The system consists of a sand-water-vapour mixture in a tube that is heated from above and cooled from below. Under certain con... Read More about The analysis of a two-phase zone with condensation in a porous medium.

Exploring the psychosocial concerns of outpatients with disfiguring conditions (2003)
Journal Article

Investigating the appearance-related concerns of people with hand injuries (2003)
Journal Article

An investigation of the appearance-related concerns of patients with disfiguring hand conditions was carried out in two out-patient clinics. A considerable proportion of the 122 respondents were experiencing psychosocial problems including anxiety, d... Read More about Investigating the appearance-related concerns of people with hand injuries.

Structure and Energetics of a Turbulent Trailing Edge Flow (2003)
Journal Article

Results from a direct numerical simulation (DNS) of turbulent flow over a rectangular trailing edge geometry are used to study energy transfers in detail. The numerical procedure employs a separate boundary layer simulation which is used to generate... Read More about Structure and Energetics of a Turbulent Trailing Edge Flow.

On the use of an enhanced transverse shear strain shell element for problems involving large rotations (2003)
Journal Article

This paper presents the extension of a previously developed formulation for shell elements in order to account for non-linear geometric effects, particularly in the presence of large rotations. To eliminate transverse shear locking, the developed she... Read More about On the use of an enhanced transverse shear strain shell element for problems involving large rotations.

The flow of a DAE near a singular equilibrium (2003)
Journal Article

We extend the differential-algebraic equation (DAE) taxonomy by assuming that the linearization of a DAE about a singular equilibrium has a particular index-2 Kronecker normal form. A Lyapunov-Schmidt procedure is used to reduce the DAE to a quasilin... Read More about The flow of a DAE near a singular equilibrium.

Transversality and separation of zeros in second order differential equations (2003)
Journal Article

Sufficient conditions on the non-linearity f are given which ensure that non-trivial solutions of second order differential equations of the form Lu = f(t, u) have a finite number of transverse zeros in a given finite time interval. We also obtain a... Read More about Transversality and separation of zeros in second order differential equations.

Simulation and modelling of turbulent trailing-edge flow (2002)
Journal Article

Computations of turbulent trailing-edge flow have been carried out at a Reynolds number of 1000 (based on the free-stream quantities and the trailing-edge thickness) using an unsteady 3D Reynolds-Averaged Navier-Stokes (URANS) code, in which two-equa... Read More about Simulation and modelling of turbulent trailing-edge flow.

Development of a one point quadrature shell element for nonlinear applications with contact and anisotropy (2002)
Journal Article

A general purpose shell element for nonlinear applications including sheet metal forming simulation is developed based on reduced integration with one point quadrature. The developed shell element has five degrees of freedom and four nodes. It covers... Read More about Development of a one point quadrature shell element for nonlinear applications with contact and anisotropy.