This work evaluates the potential of pulsed – transient thermography for locating fixtures beneath aircraft skins in order to facilitate accurate automated assembly operations. Representative aluminium and carbon fibre aircraft skin-fixture assemblies were modelled using ThermoCalc-3D. The assemblies were also experimentally investigated with the ThermoScope system and a custom built system inc...

Fixturing, i.e. the process of immobilizing a work-piece for manufacturing or assembly operations, is a fundamental task in manufacturing. Fixtures can either be fabricated from scratch or assembled from a toolkit of modular components; the latter approach is termed modular xturing. Recently, many researchers have proposed generate and test xture design algorithms for minimal modular xture tool...

Detailed simulations of lighting and HVAC energy consumption were performed on a prototype office building in six North American climates. The goal of these simulations was to calculate the overall energy savings attributable to reductions in lighting power density (LPD) from 25.8 W/m (past practice) to 17.2 W/m (current code) to 8.6 W/m (low). Results showed that as LPD decreases, reductions i...

“A young woman thus afflicted, her clothes scarcely hanging together on her anatomy, her pulse slow and slack, her temperature two degrees below the normal mean, her bowels closed, her hair like that of a corpse—dry and lustreless, her face and limbs ashy and cold, her hollow eyes the only vivid thing about her—this wan creature whose daily food might lie on a crown piece, will be busy with mot...

Magnetic abrasive finishing (MAF) is a micromachining process that uses magnetic field and magnetic abrasive particles to conduct the mechanism of material removal in micro-nanometer scales. In this paper, by an experimental method and statistical analysis, the effects of parameters like working gap, work-piece rotational speed and material removal mechanism (injection of abrasive slurry of Al<...

A compact fiber-optic inclinometer is proposed and experimentally demonstrated based on a Fabry-Perot interference (FFPI). The sensing head consists of a short segment of thin-core fiber (TCF) following with a piece of hollow-core fiber (HCF). High-order cladding modes have been excited because of core diameter mismatch. A clear interference spectrum has been obtained as the consequence of inte...

The optimisation of the design method for verification slender steel beam-columns is still a current issue not only from scientific point view, but also practice. Therefore, main objective this paper comparison suitability established approaches, according to European standards and aluminium structures, on basis numerical simulations. Thus, finite element model was validated experimental analys...

Regular boundary element method is employed for the variational formulation of Helmholtz equation that governs the waveguiding problems. Like in the Charge simulation method, in this method, the source points associated with the fundamental solutions are allocated outside the domain so that the singular integrals which occur in the standard boundary element procedure can be avoided. First, the ...

Our Moon is a potential indicator of a possible alien presence near the Earth at some time during the past 4 billion years. To ascertain the presence of alien artifacts, a survey for ruinlike formations on the Moon has been carried out as a precursor to lunar archaeology. Computer algorithms for semi-automatic, archaeological photo-reconnaissance are discussed. About 80,000 Clementine lunar orb...