Search results for "Communications"

Les communications fonctionnelles Experts-Novices : effet de la mise en saillance catégorielle sur le pilotage du dialogue

2005

Noise Analysis and Comparison of Phase-and Frequency-Detecting Readout Systems: Application to SAW Delay Line Magnetic Field Sensor

2019

International audience; Transmission surface acoustic wave (SAW) sensors are widely used in various fields of application. In order to improve the limit of detection (LOD) of such sensor systems, it is essential to understand and quantify the relevant noise sources. Only then, strategies for noise reduction can be developed. In this paper, low noise readout systems for the application with SAW sensors in an open-loop and a closed-loop configuration are presented and experimentally investigated with regard to their phase noise on the example of a SAW delay line magnetic field sensor. Besides a comprehensive analysis of the phaseand frequency modulated signals, respectively, previously derive…

Improving IoT Communications Based on Smart Routing Algorithms

2018

International audience; Due to the recorded success by Internet of Things (IoT) technology, more and more domains use it as a communications and exchange network such as e-health, smart cities, vehicles, etc. IoT don’t stop integrating an important number of components and objects that are characterized by their complexity and heterogeneity. Such constraints make the existing routings protocols unsuitable for IoT communications. To accomplish all the expected tasks and satisfy the user services, it is important to guarantee a quality of communication that answers to the requirements of the various applications in terms of data and processing (availability, integrity, efficiency, etc.). The …

Frequency Stability Measurement of Cryogenic Sapphire Oscillators with a Multichannel Tracking DDS and the Two-Sample Covariance

2018

This article shows the first measurement of three 100 MHz signals exhibiting fluctuations from 2E-16 to parts in 1E-15 for integration time tau between 1 s and 1 day. Such stable signals are provided by three Cryogenic Sapphire Oscillators (CSOs) operating at about 10 GHz, also delivering the 100 MHz output via a dedicated synthesizer. The measurement is made possible by a 6-channel Tracking DDS (TDDS) and the two-sample covariance tool, used to estimate the Allan variance. The use of two TDDS channels per CSO enables high rejection of the instrument background noise. The covariance outperforms the Three-Cornered Hat (TCH) method in that the background converges to zero "out of the box," wi…

¿Es efectiva la publicidad móvil?

2017

A pesar de que el marketing móvil ocupa uno de los lugares estratégicos dentro de los servicios relacionados con la comunicación publicitaria, todavía son escasos los estudios que analizan los factores determinantes de su eficacia. El objetivo del presente trabajo es abordar el estudio de la eficacia de la publicidad móvil, mediante un modelo explicativo de la influencia de las variables controlables y no controlables por el anunciante en las actitudes hacia la publicidad móvil y en la intención de compra de las marcas anunciadas. El contraste de relaciones realizado a partir de una entrevista personal con cuestionario estructurado a 208 consumidores con experiencia como usuarios de publici…

A Deep Learning Model for Automatic Sleep Scoring using Multimodality Time Series

2021

Sleep scoring is a fundamental but time-consuming process in any sleep laboratory. Automatic sleep scoring is crucial and urgent to help address the increasing unmet need for sleep research. Therefore, this paper aims to develop an end-to-end deep learning architecture using raw polysomnographic recordings to automate sleep scoring. The proposed model adopts two-dimensional convolutional neural networks (2D-CNN) to automatically learn features from multi-modality signals, together with a "squeeze and excitation" block for recalibrating channel-wise feature responses. The learnt representations are finally fed to a softmax classifier to generate predictions for each sleep stage. The model pe…

Rethinking Academic Literacies: Designing multifaceted academic literacy experiences for pre-service teachers

2013

This manuscript introduces a multidimensional framework for academic literacies to help instructors become more aware of different aspects of literacies and how they might be used to plan and orchestrate meaningful, multifaceted literacy experiences in their classes. More specifically, this broad framework for literacy and learning explicitly considers the overlapping role of argumentation, digital inquiry, collaboration, and innovation as they are applied to continuously evolving disciplinary literacy practices. The framework is applied to a course designed for pre-service teachers that integrated several aspects of academic literacies and offered some pedagogical guidelines to support the…

Tuning the Basicity of Synergic Bimetallic Reagents: Switching the Regioselectivity of the Direct Dimetalation of Toluene from 2,5‐ to 3,5‐Positions

2008

Meta-meta metalation: Remarkably, toluene can be directly dimanganated or dimagnesiated at the 3,5-positions using bimetallic bases with active Me3SiCH2 ligands (see scheme, blue). In contrast, n-butyl ligands lead to 2,5-metalation (red). tmp=2,2,6,6-tetramethylpiperidide.

Direct C-H metalation with chromium(ii) and iron(ii): transition- metal host/benzenediide guest magnetic inverse-crown complexes

2009

Check M(etal)ate: The chessboard and the figures represent a special reaction in which different low-polarity metals can metalate arenes directly when they are brought into the right position. In a combination of queen (sodium) and knight (chromium or iron), it is possible for the knight (usually the weaker piece) to make a direct deadly hit on the king (benzene) in this game of elemental chess. Fil: Alborés, Pablo. Johannes Gutenberg Universitat Mainz; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Carrella, Luca M.. Johannes Gutenberg Universitat Mainz; Alemania Fil: Clegg, William. University of Newcastle; Reino Unido Fil: García Álvarez, Pablo. Univ…

Interconceptualizing Europe and Peace : Identity Building Under the European Heritage Label

2019

AbstractThis chapter investigates how peace is used in attempts to build a collective identity for the European Union in the context of the European Heritage Label (EHL), a central instrument in the EU’s cultural heritage policy. The official EHL documents and the websites of the EHL sites are analysed using a conceptual approach that particularly focuses on the interconceptualizations between peace and Europe. The ways peace is discussed can be divided into four thematic categories: treaties, institutions, practices, and symbols related to peace. The chapter concludes that heritage related to peace is mainly discussed in a non-contradictory manner, with little space for dissonance.