Concept

Propagation des ondes radio

Publications associées (364)

Stacked rings for terahertz wave-guiding

Stefano Alberti, Jean-Philippe Ansermet, Jean-Philippe Hogge, Alessandro Macor

We demonstrate the construction of corrugated waveguides using stacked rings to propagate terahertz frequencies. The waveguide allows propagation of the same fundamental mode as an optical-fiber, namely, the H E11 mode. This simple concept opens the way fo ...

American Institute of Physics2011

Plasmon delocalization onset in finite sized nanostructures

Olivier Martin, Arash Farhang

The transition from localized to delocalized plasmons (i.e. the transition from a situation where the decay length of a travelling surface plasma wave is greater than its propagation distance to a situation where it is smaller) and hence the onset of plasm ...

2011

Training Distributed Neural Networks by Consensus

Martin Hasler, Leonidas Georgopoulos

We address the problem of learning a classifier from distributed data over a number of arbitrarily connected machines without exchange of the datapoints. Our purpose is to train a neural network at each machine as if the entire dataset was locally availabl ...

2011

Direct Visualization of the Axial Phase Evolution of Light Fields Emerging from Microstructures

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

We investigate the axial phase evolution of light emerging from microstructures. The high-resolution interference microscope (HRIM) allows to record three-dimensional (3D) phase distributions in differential and propagation modes along the longitudinal dir ...

2011

A survey of techniques and challenges in underwater localization

Marc Waldmeyer

Underwater Wireless Sensor Networks (UWSNs) are expected to support a variety of civilian and military applications. Sensed data can only be interpreted meaningfully when referenced to the location of the sensor, making localization an important problem. W ...

2011

Continuum Vlasov Simulation in Four Phase-Space Dimensions

Stephan Brunner

In the VALHALLA project, we are developing scalable algorithms for the continuum solution of the Vlasov-Maxwell equations in two spatial and two velocity dimensions. We use fourth-order temporal and spatial discretizations of the conservative form of the e ...

2010

Method for wireless transmission between two electroacoustic transducers, and device for carrying out said method

Michel Declercq, Patrick Favre

The invention relates to a method and a device for wireless transmission between at least one first transducer (T1) arranged in a first location and at least one second transducer (T2) arranged in a second location remote from the first location without us ...

2010

Guided Bloch Surface Waves on Ultrathin Polymeric Ridges

Olivier Martin, Hans Peter Herzig, Tristan Sfez, Daniele Brunazzo, Francesco Michelotti

We present a direct evidence of Bloch surface waves (BSWs) waveguiding on ultrathin polymeric ridges, supported by near-field measurements. It is demonstrated that near-infrared BSWs sustained by a silicon-based multilayer can be locally coupled and guided ...

2010

Theoretical Methods for Wave Propagation across Jointed Rock Masses

Jian Zhao, Jianbo Zhu

Different methods are presently available for the analysis of wave propagation across jointed rock masses with the consideration of multiple wave reflections between joints. These methods can be divided into two categories. One is based on the displacement ...

Springer Verlag2010

Wave Propagation in Auxetic Tetrachiral Honeycombs

Alessandro Spadoni

This paper describes a numerical and experimental investigation on the flexural wave propagation properties of a novel class of negative Poisson's ratio honeycombs with tetrachiral topology. Tetrachiral honeycombs are structures defined by cylinders connec ...

American Society of Mechanical Engineers2010

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Connectez-vous pour utiliser Chat avec Graph Search