Concept

Téléphone sans fil

Publications associées (25)

Design, Realization and Experimental Test of a Coaxial Exponential Transmission Line Adaptor for a Half Impulse Radiating Antenna

This paper describes the simulation, design, realization, and experimental test of a tapered transmission line (TL) for adapting a broad-band impulse generator to a radiating antenna, for a frequency range of 50 MHz-1 GHz. Two different taper geometries ar ...

2011

Tracking Games in Mobile Networks

Jean-Pierre Hubaux, Mathias Jacques Jean-Marc Humbert, Julien Freudiger

Users of mobile networks can change their identifiers in regions called mix zones in order to defeat the attempt of third parties to track their location. Mix zones must be deployed carefully in the network to reduce the cost they induce on mobile users an ...

Springer-Verlag New York Inc2010

Location Privacy amidst Local Eavesdroppers

Mathias Jacques Jean-Marc Humbert

Mobile social networks and location-aware applications are becoming more and more widespread in current wireless networks. Thanks to WiFi or Bluetooth-enabled devices, everyday mobile users can enjoy new services. However, the deployment of these mobile te ...

2009

Multimode calculation of frequency tunable gyrotrons for dynamic nuclear polarization applications

Stefano Alberti, Jean-Philippe Hogge

Multimode calculations of a low-power (above 10W) high-frequency (200 GHz -300 GHz) gyrotron for NMR (nuclear magnetic resonance) spectroscopy applications have been performed. Six transverse modes (TE-7, 2; TE7, 2; TE-4, 3; TE4, 3; TE-2, 4; TE2, 4) whose ...

2008

Mix-Zones for Location Privacy in Vehicular Networks

Jean-Pierre Hubaux, Panagiotis Papadimitratos, Mark Felegyhazi, Julien Freudiger, Maxime Raya

Vehicular Networks (VNs) seek to provide, among other applications, safer driving conditions. To do so, vehicles need to periodically broadcast safety messages providing precise position information to nearby vehicles. However, this frequent messaging (e.g ...

2007

Design and fabrication of suspended-gate MOSFETs for MEMS resonator, switch and memory applications

Nicolas Abelé

Wireless communication systems and handset devices are showing a rapid growth in consumer and military applications. Applications using wireless communication standards such as personal connectivity devices (Bluetooth), mobile systems (GSM, UMTS, WCDMA) an ...

EPFL2007

Reconstruction of the electron distribution function during ECRH/ECCD and magnetic reconnection events in a tokamak plasma

Igor Klimanov

The performance of tokamaks is usually described in terms of plasma temperature, density and confinement time. The term temperature implies that the plasma is in thermal equilibrium and its particles have maxwellian (normal) velocity distribution. However, ...

EPFL2006

Electron cyclotron emission spectrometry on the Tokamak a Configuration Variable

Ambrogio Fasoli, Timothy Goodman, Stefano Alberti, Patrick Blanchard, Laurie Porte, Igor Klimanov

Electron cyclotron emission (ECE) measurements are an important component of the diagnostic suite on the Tokamak a Configuration Variable (TCV) [F. Hoffman , Plasma Phys. Controlled Fusion 36, B277 (1994)]. A recently installed, 24-channel dual-conversion ...

2005

SOWER: Self-Organizing Wireless Network for Messaging

Jean-Pierre Hubaux, Mark Felegyhazi, Srdan Capkun

Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet many consumers consider that the price charged by the cellular network operators is too high. In this paper, we explain that ther ...

2004

SOWER: Self-Organizing Wireless Network for Messaging

Jean-Pierre Hubaux, Mark Felegyhazi, Srdan Capkun

Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet many consumers consider that the price cellular network operators charge for it is too high. In this paper, we explain that there ...

2004

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