In 1905 Varèse discovered the French edition of Die Lehre von den Tonempfindungen als physiologische Grundlage für die Theorie der Musik [On the Sensations of Tone as a Physiological Basis for the Theory of Music] of Hermann von Helmholtz (1863), the explicit intention of which was to bring together the common frontiers of science and music. This discovery was a revelation for the 22-year-old c...

Forschungszentrum Karlsruhe GmbH, Institut für Technische Chemie, Bereich Thermische Abfallbehandlung, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany Phone: + 49 7247 / 82 3146 Fax: + 49 7247 / 82 6549 e-mail: [email protected] (Primary Contact) Hans Leibold Forschungszentrum Karlsruhe GmbH, Institut für Technische Chemie, Bereich Thermische Abfallbehandlung, H...

Acquisition of an animal gene by microsporidian intracellular parasites Correspondence Any scientific heroes? Hermann von Helmholtz, of course, and Richard Feynman. Both were physicists. Helmholtz was also both a physiologist and a psychophysicist, perhaps the best ever. Feynman was neither but his curiosity and his clarity are inspirational. His ability to observe was not bad either — remember...

A continuation method is presented for solving the inverse medium scattering problem of the Helmholtz equation in R. The algorithm requires only single-frequency scattering data. Using an initial guess from the Born approximation, each update is obtained via recursive linearization on the spatial frequency of a one-parameter family of plane waves by solving one forward and one adjoint problem o...

and a0 is a constant, b is a continuous periodic function of variables x and y, a1 and g are continuous periodic functions. This integral equation appears in exterior boundary value problems for the two-dimensional Helmholtz equation (see [11,15– 17,27]). Constructions of conformal mapping also lead to integral equations of this kind (see [22]). In recent years, the Helmholtz equation and its n...

A thermodynamic property model explicit in the Helmholtz energy is presented for the R-134a/245fa mixtures. A multi-fluid approximation based on pure-fluid Helmholtz energy equations of state forms the basis of the property model. The Helmholtz energy of the mixture is expressed as the sum of the ideal gas contribution, the compressibility contribution (real fluid contribution), and the contrib...

This paper presents an analytical approach of the propagation of an acoustic wave through a normally distributed disordered lattice made up of Helmholtz resonators connected to a cylindrical duct. This approach allows to determine analytically the exact transmission coefficient of a weakly disordered lattice. Analytical results are compared to a well-known numerical method based on a matrix pro...

In this paper, we apply the thermodynamic framework recently put into place by Rajagopal and co-workers, to develop rate-type models for viscoelastic fluids which do not possess instantaneous elasticity. To illustrate the capabilities of such models we make a specific choice for the specific Helmholtz potential and the rate of dissipation and consider the creep and stress relaxation response as...

We report, to the best of our knowledge, the first exact analytical bistable dark spatial solitons of a nonlinear Helmholtz equation with a cubic-quintic refractive-index model. Our analysis begins with an investigation of the modulational instability characteristics of Helmholtz plane waves. We then derive a dark soliton by mapping the desired asymptotic form onto a uniform background field, a...

We present an approach for text analysis, especially for topic words extraction and document classification, based on a probabilistic generative model. Generative models are useful since they can extract the underlying causal structure of data objects. For this model, a stochastic Helmholtz machine is used and it is fitted using the wake-sleep algorithm, a simple stochastic learning algorithm. ...