Concept

Galaxie active

Publications associées (231)

Search for ultra-high-energy neutrinos with AMANDA-II

Mathieu Ribordy, Levent Demirörs, Yi Wang, Xiaoxia Bai

A search for diffuse neutrinos with energies in excess of 105 GeV is conducted with AMANDA-II data recorded between 2000 and 2002. Above 107 GeV, the Earth is essentially opaque to neutrinos. This fact, combined with the limited overburden of the AMANDA-II ...

2008

An exploratory search for z greater than or similar to 6 quasars in the ukidss early data release

Frédéric Courbin, Georges Meylan, Alexander Patrick Eigenbrod

We conducted an exploratory search for quasars at z similar to 6-8, using the Early Data Release (EDR) from the United Kingdom Infrared Deep Sky Survey (UKIDSS) cross-matched to panoramic optical imagery. High-redshift quasar candidates are chosen using mu ...

2008

Narrowband Resonant Cavity Enhanced mid-IR Photodetectors tuneable within a broad wavelength region

Niels Quack

Narrowband Resonant Cavity Enhanced mid-IR Photodetectors tuneable within a broad wavelength region ...

2007

Near infrared twin photon source.

Benoît Marie Joseph Deveaud, François Morier-Genoud, Ounsi El Daïf

Optical parametric oscillator including a semiconductor microcavity being configured to spatially localize polaritons of at least three quantized polariton energy levels to effect an optical parametric oscillation. ...

2006

Realistic quantitative descriptions of electron transfer reactions: Diabatic free-energy surfaces from first-principles molecular dynamics

Nicola Marzari, Matteo Cococcioni

A general approach to calculate the diabatic surfaces for electron-transfer reactions is presented, based on first-principles molecular dynamics of the active centers and their surrounding medium. The excitation energy corresponding to the transfer of an e ...

2006

Multi-notch holographic filters for atmospheric lines suppression

Demetri Psaltis

Near-infrared emission from atmospheric OH radicals is known to severely affect astronomical observations. Until now, only complex dispersive instruments were partially capable of removing this unwanted background, which is composed of hundreds of narrow e ...

2004

Investigation of the consistency of magnetic and soft X-ray plasma position measurements on TCV by means of a rapid tomographic inversion algorithm

Basil Duval, Stefano Coda, Timothy Goodman, Xavier Llobet, Henri Weisen, Jonathan Bryan Lister

A rapid algorithm for tomographic inversion is presented that allows post-discharge reconstruction of the soft x-ray (SXR) emissivity evolution in the Tokamak a configuration variable (TCV). Simultaneously, it determines the centre of gravity of the emissi ...

2003

Level repulsion of localised excitons observed in near-field photoluminescence spectra

Benoît Marie Joseph Deveaud, Andrea Crottini, Reda Idrissi Kaitouni, Xiao Wang

GaAs/GaAlAs quantum wires grown by modulated flow rate metalorganic chemical vapour deposition were investigated by spatially resolved photoluminescence spectroscopy using a scanning near-field optical microscope. It was found that the wires decompose into ...

2002

Toroidally localized and nonlocalized ballooning instabilities in a stellarator

Wilfred Anthony Cooper

It is shown that the coexistence of toroidally nonlocalized ideal-hydromagnetic ballooning instabilities, with a quasidiscrete spectrum, and toroidally localized ballooning instabilities with a broad continuous spectrum, as predicted by Dewar and Glasser [ ...

1998

No evidence for intramolecular hydrogen bonds in a-fluoro carboxamides

RMeCFCONH2 (R = H, cyclohexyl, Ph, 4-ClC6H4, 2-pyridyl) are prepd. by treatment of the corresponding a-hydroxy carboxamides with Et2NSF3. IR spectra argue strongly against the existence of intramol. H bonds between the NH2 group and the F atom. [on SciFind ...

1997

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