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Engineering polymer MEMS using combined microfluidic pervaporation and micro-molding

Microsystems & Nanoengineering 2018年第1期4卷 270-277页

作者： Damien Thuau Cédric Laval Isabelle Dufour Philippe Poulin Cédric Ayela Jean-Baptiste Salmon laboratoire ims University of BordeauxUMR 5218ENSCBP16 avenue Pey Berland33607 PessacFrance Centre National de Recherche Scientifique University of BordeauxSolvayLOFUMR 525833600 PessacFrance Centre de Recherche Paul Pascal University of BordeauxAvenue Schweitzer33600 PessacFrance

In view of the extensive increase of flexible devices and wearable electronics,the development of polymer microelectro-mechanical systems(MEMS)is becoming more and more important since their potential to meet the multiple needs for sensing applications in flexible electronics is now clearly ***,polymer micromachining for MEMS applications is not yet as mature as its silicon counterpart,and innovative microfabrication techniques are still *** show in the present work an emerging and versatile microfabrication method to produce arbitrary organic,spatially resolved multilayer micro-structures,starting from dilute inks,and with possibly a large choice of *** approach consists in extending classical microfluidic pervaporation combined with MIcro-Molding In *** illustrate the potential of this technique,bilayer polymer double-clamped resonators with integrated piezoresistive readout have been fabricated,characterized,and applied to humidity *** present work opens new opportunities for the conception and integration of polymers in MEMS.

关键词： polymer dilute starting

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Solutions Comparison towards Voice Services Implementation for Operators Starting LTE Deployment

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Communications and Network 2012年第2期4卷 122-128页

作者： Youness Jouihri Zouhair Guennoun laboratoire d’ Electronique et de Communications—LEC Ecole Mohammadia d’ Ingénieurs—EMI Université Mohammed V-Agdal—UM5A Rabat Morocco

The continuity of voice services, for many operators planning to start their LTE network, is one of the key requirements to cover back the cost of this expensive network. In this paper, we discuss and compare the possible solutions to add voice services on an LTE network dedicated mainly for high-speed data transfer. By comparing advantages and inconvenient of the existing approaches, we conclude that the selection of the One Voice approach is obvious, especially for operators starting LTE deployments, the One Voice approach has the support of all the famous operators and vendors. Selecting the One Voice approach as a first alternative was evident, but the choice of CSFB as a mid-term solution or backup solution from many operators was not clear. As a key lesson can be learned from the existing technologies, CDMA and GSM, where the type of handset was one of the major factors of the GSM success;we prove in this paper that VOLGA approach is better than CSFB for many reasons: The VOLGA approach uses less complex and less expensive handset while it gives more comfortable user experience compared to CSFB approach, so operators should take into consideration these two points before selecting the second alternative.

关键词： Voice over LTE One Voice VOLGA ims SIP CSFB SRVCC

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Characterisation of the Coherent Infrasound Sources Recorded by the Infrasound International Monitoring System Station I48TN in Tunisia (Mines &Quarries)

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Atmospheric and Climate Sciences 2021年第1期11卷 214-243页

作者： Abdelouaheb Agrebi Andry Harifidy Ramanantsoa Gerard Rambolamanana Eddy Harilala Rasolomanana On-Site Inspection Division CTBTO Vienna Austria laboratoire de Séismologie et d’Infrason Institut et Observatoire de Géophysique Université Antananarivo Antananarivo Madagascar International Data Centre CTBTO Vienna Austria Ecole doctorale ingénierie et géosciences Université d’Antananarivo Ecole Polytechnique Antananarivo Madagascar

The I48TN is one of the 60 International Monitoring System (ims) stations of the Comprehensive nuclear Test Ban Treaty Organization (CTBTO), characterized by its location in the heart of the ims Infrasound network. The ability of the International Monitoring System (ims) infrasound network to detect atmospheric nuclear explosions and other signals of interest is strongly dependent on station-specific ambient noise. This ambient noise, includes both incoherent wind noise and real coherent infrasonic waves. Infrasound analysis software detects tens to hundreds of events per day which consume a lot of time for the Infrasound analysts, to define and categorize events where around 90% of the detections are coherent noise. This study analyzed the importance of the synergy between infrasound and seismic data, and provided the infrasound data analyst with the most important local coherent infrasound sources in the region as recorded by the ims station I48TN, in order to reduce the workload of the analysts and give them a clear view on the coherent noise affecting this station for better discrimination between events of interest like nuclear explosions and coherent sources. DTK_GPMCC and DIVA software were used to perform this study. Geotool software from the International Data Centre (IDC) was used in analysing seismic data from the Tunisian ims station KEST. The result of this study allowed the characterization of the most important coherent local infrasound sources (Mines and Quarries) which are considered as coherent noise to I48TN station and correct parameters in some reference events in the Reference Event Database source of the International Data Centre.

关键词： Mines and Quarries Infrasound Stations Infrasound Local Sources Acoustic Energy

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