This paper presents a stability investigation of the step recessed, hydro-static and -dynamic hybrid water-lubricated journal bearings for fuel cell vehicle compressor. The dynamic coefficients and stability threshold speed of the bearings are numerically calculated by solving the turbulent Reynolds equation by using FEM. Two configuration bearings are comparatively studied and the different dy...

The small amount of power demanded by many present-day electronic devices, opens the possibility to convert part of the energy present in the environment into electrical energy, using several methods. One of such methods is to use piezoelectric film bending beams inside the shoe, and use part of the mechanical energy employed during normal walking activity. This work analyzes several bending be...

We have developed an industrial CT and Digital Radiography system (CT/DR) for NDT at the USC (Spain). A 510 mm long detector array of 640 detection elements with sub-millimetre spacing (0.8 mm), together with a 50kV mini-focus tube have been integrated in a 3-axis positioning system of flexible configuration. Accurate characterization of geometrical parameters and system commissioning has been ...

The helix model describes the minimal coupling of an abelian gauge field with three bosonic matter fields in 0+1 dimensions; it is a model without a global Gribov obstruction. We perform the stochastic quantization in configuration space and prove nonperturbatively equivalence with the path integral formalism. Major points of our approach are the geometrical understanding of separations into ga...

Solutions to the problem of radiation of dipole antennas in the presence of a stratified anisotropic media are facilitated by decomposing a general wave field into transverse magnetic (TM) and transverse electric (TE) modes. Employing the propagation matrices, wave amplitudes in any region are related to those in any other regions. The reflection coefficients, which embed all the information ab...

The transient phenomena of incident shock waves during its passage through an orifice, a diverging nozzle, and a conical disk as baffles in a tube are numerically simulated. The influence of geometrical configurations of the baffles on shock attenuation is investigated. The results show that the conical disk was most effective configuration to weaken the strength of transmitted shock waves, sin...

A configuration for a miniaturized band-pass filter on a coplanar waveguide (CPW) is proposed in this communication. Parametric studies conducted for various geometrical parameters suggest that the frequency response of the filter is strongly related to that of the spiral slots. A a series gap on the center conductor of the CPW changes the overall response of the device. For validation of these...

Intracranial stents are medical devices that are becoming increasingly popular in the treatment of intracranial aneurysms. A methodology that predicts the released stent configuration prior to intervention has the potential to support the physician in the selection of the optimal approach for a specific patient. This paper proposes a fast virtual stenting technique based on constrained simplex ...

It is well-known that filtered chaotic signals can exhibit increases in observed fractal dimension. However, there is still insufficient knowledge regarding the underlying causes of this phenomenon. We provide further insight into this problem through the use of computer animations and three-dimensional ray-tracings. Specifically, we show that lowpass filters can induce a non-uniform convergenc...

We derive the q-deformation of the chiral Gross-Taylor holomorphic string large N expansion of two dimensional SU(N) Yang-Mills theory. Delta functions on symmetric group algebras are replaced by the corresponding objects (canonical trace functions) for Hecke algebras. The role of the Schur-Weyl duality between unitary groups and symmetric groups is now played by q-deformed Schur-Weyl duality o...