The current design of infrastructure facilities is mainly driven by the application of guidelines, codes and international standards. The complex interpretation and geometric representation of those rules impedes the dynamic search for alternative solutions. Parallel to this, in recent years there has been an increasing tendency toward the adoption of 3D modeling solutions. Of particular benefi...

This paper presents evaluation results of parametric auralization system. The auralization method, based on imagesource and edge diffraction modeling, is briefly overviewed and evaluation of the auralization quality is performed both subjectively and objectively. As a case study the auralization of a lecture room is considered with three different musical stimuli. The evaluation results show th...

The present numerical study aims at shedding light on the mechanism underlying the precessional instability in a sphere. Precessional instabilities in the form of parametric resonance due to topographic coupling have been reported in a spheroidal geometry both analytically and numerically. We show that such parametric resonances can also develop in spherical geometry due to the conical shear la...

Abstract. In this contribution, we study the problem of prior selection arising in Bayesian inference. There is an extensive literature on the construction of non informative priors and the subject seems far from a definite solution [1]. Here we revisit this subject with differential geometry tools and propose to construct the prior in a Bayesian decision theoretic framework. We show how the co...

There are computer graphics applications for which the shape and reflectance of complex objects, such as faces, cannot be obtained using specialized equipment due to cost and practical considerations. We present an imagebased technique that uses only a small number of example images, and assumes a parametric model of reflectance, to simultaneously and reliably recover the Bidirectional Reflecta...

Results are reported from two molecular-dynamics simulations designed to yield insight into the engineering of nanometre-scale structures. The first is the initial stages of the indentation of a silicon substrate by an atomically-sharp diamond tip. Up to an indentation depth of approximately 0.6 nm the substrate responds elastically and the profile of the disturbed region of the substrate norma...

This paper presents a surface generation tool designed for the construction of aircraft geometry. The software generates complex geometries which can be crafted or modified by the user in real time. The surface generation is based on Partial Differential Equations (PDEs). The PDE method can produce different configurations of aircraft shapes interactively. Each surface is generated by a number ...

This paper presents two major additions to our high-fidelity aero-structural design environment. Our framework uses high-fidelity descriptions for both the flow around the aircraft (Euler and Navier-Stokes) and for the structural displacements and stresses (a full finite-element model) and relies on a coupled-adjoint sensitivity analysis procedure to enable the simultaneous design of the shape ...

This chapter focuses on three computer-aided geometric design (CAGD) techniques that are often needed to \prepare" a complex geometry for grid generation. Standard grid generation methods, as discussed in [George '91], [Knupp & Steinberg '93], and [Thompson et al. '85], assume that parametric surfaces are well parametrized and free of undesired discontinuities. We describe CAGD techniques that ...

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