Search results for "CIRCUIT"

Effect of different aqueous solutions of pure salts and salt mixtures in reverse electrodialysis systems for closed-loop applications

2018

Abstract Reverse Electrodialysis (RED) in a closed-loop arrangement is a viable way to convert low-grade heat into electric power. The present work experimentally investigates the use of pure salt- and equimolar two salts-water solutions as feeds in a lab-scale RED unit. RED performances were analysed in terms of Open Circuit Voltage (OCV), stack resistance and corrected power density. The pure salts and the mixtures employed were chosen via a computational analysis. Effect of feed solution velocity and concentration was investigated. Results concerning the pure salt-water experiments show that NH4Cl is the most performing salt in the concentration range probed, while higher power density v…

ZnO Nanowires catalytic solution growth for piezotronic and bio-applications

2016

HIGH-DENSITY ZnO NANOWIRES ON PRINTED CIRCUIT BOARDS FOR WEARABLE SENSORS AND HEATERS

2019

Cluster matching in time resolved imaging for VLSI analysis

2014

International audience; If scaling has the benefit of enabling manufacturers to design tomorrow's integrated circuits, from the failure analyst point of view it also has the drawback of making devices more complex. The test sequence for modern VLSI can be quite long, with thousands of vector. Dynamic photon emission databases can contain millions of photons representing thousands of state changes in the region of interest. Finding a candidate location where to perform physical analysis is quite challenging, especially if the fault occurs on a single vector. In this paper, we suggest a new methodology to find single vector fault in dynamic photon emission database. The process is applied at …

Design and Characterization of Automated Color Sensors System

2014

International audience; The paper presents a color sensor system that can process light reflected from a surface and produce a digital output representing the color of the surface. The end-user interface circuit requires only a 3-bit pseudo flash analog-to-digital converter (ADC) in place of the conventional/typical design comprising ADC, digital signal processor and memory. For scalability and compactness, the ADC was designed such that only two comparators were required regardless of the number of color/wavelength to be identified. The complete system design has been implemented in hardware (bread board) and fully characterized. The ADC achieved less than 0.1 LSB for both INL and DNL. The…

Unfolding of saddle-nodes and their Dulac time

2016

Altres ajuts: UNAB10-4E-378, co-funded by ERDF "A way to build Europe" and by the French ANR-11-BS01-0009 STAAVF. In this paper we study unfoldings of saddle-nodes and their Dulac time. By unfolding a saddle-node, saddles and nodes appear. In the first result (Theorem A) we give a uniform asymptotic expansion of the trajectories arriving at the node. Uniformity is with respect to all parameters including the unfolding parameter bringing the node to a saddle-node and a parameter belonging to a space of functions. In the second part, we apply this first result for proving a regularity result (Theorem B) on the Dulac time (time of Dulac map) of an unfolding of a saddle-node. This result is a b…

Vers un concept juridique d’agriculture de proximité

2016

International audience; La ville est traditionnellement pour les ruralistes une zone d’ombre qui obscurcit le destin de l’agriculture. Comme en photographie, lorsque le contraste d’une scène est trop fort, une partie de l’image ressort « sous-exposée » et une autre « sur-exposée ». Ainsi pendant longtemps, il n’a pas été possible de voir ensemble et harmonieusement l’agriculture et la ville.Dans l’inconscient collectif, la distinction du rural et de l’urbain est structurante : elle renvoie à des identités propres, généralement opposées. On doit à la révolution industrielle du XIXème la scission de la campagne et de la ville en deux univers clos et complémentaires. L’espace rural a alors été…

Agriculture et ville : vers de nouvelles relations juridiques

2016

International audience; Historiquement perçues comme éloignées l'une de l'autre, l'agriculture et la ville sont en voie de constant rapprochement. L'étalement physique des agglomérations, avec leurs zones périurbaines, conjugué à la mobilité accrue des citadins comme des ruraux, réduisent les distances entre les mondes rural et urbain. Si le phénomène provoque, entre l'agriculture et la ville, des rapports d'opposition, il fait aussi naître des rapports de séduction se concluant par des projets agri-urbains. Reste à les concevoir et les organiser juridiquement, enjeu qui n'a jamais été véritablement posé. Or la difficulté est réelle de marier deux droits, celui des villes et celui des champ…

Near-field spectroscopy of low-loss waveguide integrated microcavities

2006

International audience; A scanning near-field spectroscopy method is used to observe loss reduction and Q-factor enhancement due to transverse-mode profile matching within photonic-crystal microcavities. Near-field measurements performed directly on cavity modes are compared with three-dimensional calculations and quantitative agreement is observed. (c) 2006 American Institute of Physics.

Interface engineering for improved light transmittance through photonic crystal flat lenses

2010

In this paper, we present photonic crystal flat lenses with interfaces engineered to improve the light transmittance thanks to a broad angles impedance matching. The interface engineering consists in the realization of antireflection gratings on the edges of the lenses which are designed to reduce the propagative waves reflectivity over a wide range of incident angles. The fabricated structures were measured in optical near-field and a four times enhancement of the light transmission efficiency is reported.