Search results for "BAND"

Pelikeskeisesti salibandya 7-12-vuotiaille

2000

Näkökulmia salibandyn taitoon ja taktiikkaan

2000

Requirements for using simulation to design and assess wireless ATM handover solutions

1999

Wireless ATM (WATM) has been widely considered as a solution for broadband wireless services. Handover is one of the most important mobility support functions in the WATM network. Many handover solutions have been proposed, analysed, and benchmarked. Simulations have been broadly used to assess these solutions. However, there are many dilemmas in how simulation has been applied as a research methodology: heterogeneous simulation systems used, lack of comparison with other related work, biased conclusions, and unavailability of simulation models and systems to researchers. The WATM research community lacks a standard and commonly acceptable methodology for applying simulation. To address thi…

Hommage à Joaquín Díaz-Corralejo Conde (1943-2020)

2021

Ce quatorzième numéro est à la fois un hommage au Professeur Joaquín Díaz-Corralejo Conde, philologue et didacticien, grand défenseur de la langue française en Espagne et une suite thématique du treizième numéro intitulé La bande dessinée francophone dans l’entre-deux, sous la coordination scientifique d’Adela Cortijo Talavera (2020). Cette livraison contient, entre bande dessinée et roman graphique, quatre volets qui orientent le lecteur, placé dans ce champ artistique, narratif, hybride, infiniment riche, vers une pluralité disciplinaire dont diverses branches de la linguistique, de la traduction, de la didactique de la langue-culture française, sous la plume de chercheurs d’Espagne bien …

NBI and Laryngeal Papillomatosis: A Diagnostic Challenge: A Systematic Review.

2022

Narrow-band imaging (NBI) represents a valid aid in laryngeal squamous cell carcinoma (LSCC) diagnosis for detecting vascular changes. However, LSCC and laryngeal papillomatosis (LP) show similar vascular patterns that may lead to misdiagnosis and improper treatment. This review aims to deepen this NBI limit in order to stress a careful preoperative evaluation of laryngeal lesions. The research was carried out on PubMed, Web of Science and Scopus databases using specific keywords. The topic of research was assessed by these parameters: accuracy, sensitivity, specificity, and positive and negative predictive values. This review included only five articles: they demonstrated that NBI is bette…

L’archive : horizons de la création contemporaine

2017

… archival art is as much preproduction as it is postproduction: concerned less with absolute origins than with obscure traces (perhaps “anarchival impulse” is the more appropriate phrase), these artists are often drawn to unfulfilled beginnings or incomplete projects—in art and in history alike—that might offer points of departure again. (Foster 5) L’archive dans la création contemporaine est l’objet d’une fascination qui, à chaque nouvelle rencontre, suscite la glose de la critique, des lec...

Invited Article: Ultra-broadband terahertz coherent detection via a silicon nitride-based deep sub-wavelength metallic slit

2018

We present a novel class of CMOS-compatible devices aimed to perform the solid-state-biased coherent detection of ultrashort terahertz pulses, i.e., featuring a gap-free bandwidth at least two decades-wide. Such a structure relies on a 1-µm-wide slit aperture located between two parallel aluminum pads, embedded in a 1-µm-thick layer of silicon nitride, and deposited on a quartz substrate. We show that this device can detect ultra-broadband terahertz pulses by employing unprecedented low optical probe energies of only a few tens of nanojoules. This is due to the more than one order of magnitude higher nonlinear coefficient of silicon nitride with respect to silica, the nonlinear material emp…

Effects of Temperature and Axial Strain on Four-Wave Mixing Parametric Frequencies in Microstructured Optical Fibers Pumped in the Normal Dispersion …

2014

A study of the effect of temperature and axial strain on the parametric wavelengths produced by four-wave mixing in microstructured optical fibers is presented. Degenerate four-wave mixing was generated in the fibers by pumping at normal dispersion, near the zero-dispersion wavelength, causing the appearance of two widely-spaced four-wave mixing spectral bands. Temperature changes, and/or axial strain applied to the fiber, affects the dispersion characteristics of the fiber, which can result in the shift of the parametric wavelengths. We show that the increase of temperature causes the signal and idler wavelengths to shift linearly towards shorter and longer wavelengths, respectively. For t…

Enabling Searches on Wavelengths in a Hyperspectral Indices Database

2018

Abstract. Spectral indices derived from hyperspectral reflectance measurements are powerful tools to estimate physical parameters in a non-destructive and precise way for several fields of applications, among others vegetation health analysis, coastal and deep water constituents, geology, and atmosphere composition. In the last years, several micro-hyperspectral sensors have appeared, with both full-frame and push-broom acquisition technologies, while in the near future several hyperspectral spaceborne missions are planned to be launched. This is fostering the use of hyperspectral data in basic and applied research causing a large number of spectral indices to be defined and used in various…

Supercontinuum Generation and Intermodal Four-Wave Mixing in a Step-Index Few-Mode Fibre

2019

International audience; The complex spatiotemporal dynamics of nonlinear light propagation in multimode fibers (MMFs) has recently witnessed a renewed interest because of their experimental realization in emerging key areas of laser physics and fiber optics [1]. Specifically, MMFs have a number of linear and nonlinear optical properties that make them very attractive to investigate new spatiotemporal effects fundamentally different from standard single-mode fibers. These include the observation of multimode solitons [2], intermodal four-wave mixing (FWM) [3], geometric parametric instabilities [4], spatial beam self-cleaning [5], and the generation of supercontinuum (SC) light when pumping …