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Université de Fribourg

Multimodal stimulus coding by a gustatory sensory neuron in Drosophila larvae

Giesen, Lena van ; Hernandez-Nunez, Luis ; Delasoie-Baranek, Sophie ; Colombo, Martino ; Renaud, Philippe ; Bruggmann, Rémy ; Benton, Richard ; Samuel, Aravinthan D.T. ; Sprecher, Simon G.

In: Nature Communications, 2016, vol. 7, p. 10687

Accurate perception of taste information is crucial for animal survival. In adult Drosophila, gustatory receptor neurons (GRNs) perceive chemical stimuli of one specific gustatory modality associated with a stereotyped behavioural response, such as aversion or attraction. We show that GRNs of Drosophila larvae employ a surprisingly different mode of gustatory information coding. Using a novel...

Haute Ecole d'Ingénierie

Compact portable biosensor for arsenic detection in aqueous samples with Escherichia coli bioreporter cells

Truffer, Frederic ; Buffi, Nina ; Merulla, Davide ; Beggah, Siham ; van Lintel, Harald ; Renaud, Philippe ; van der Meer, Jan Roelof ; Geiser, Martial

In: Review of Scientific Instruments, 2014, vol. 85, no. 015120, p. 4

We present a compact portable biosensor to measure arsenic As(III) concentrations in water using Escherichia coli bioreporter cells. Escherichia coli expresses green fluorescent protein in a linearly dependent manner as a function of the arsenic concentration (between 0 and 100μg/L). The device accommodates a small polydimethylsiloxane microfluidic chip that holds the agarose-encapsulated...

Université de Neuchâtel

Two steps micromoulding and photopolymer high-aspect ratio structuring for applications in piezoelectric motor components

Dellmann, Laurent ; Roth, S. ; Beuret, C. ; Paratte, L. ; Racine, G.-A. ; Lorenz, H. ; Despont, M. ; Renaud, Philippe ; Vettiger, Peter ; de Rooij, Nicolaas F.

In: Microsystem Technologies, 1998, vol. 4, no. 3, p. 147-150

We report on recent advances in micro fabrication technology using micromoulding and high-aspect ratio structuring of photopolymer. The direct application is the realization of components for millimeter-size, ultrasonic piezoelectric motors. A new fabrication process using a thick epoxy-based material (SU-8) and the electroplating of nickel is demonstrated. Photopolymer structures have also been...

Université de Neuchâtel

System-Level Simulation Using Mixed-Nature Models

Boegli, Alexis ; Moser, Vincent ; Amann, Hans Peter ; Pellandini, Fausto ; Romanowicz, Bart ; Lerch, Philippe ; Laudon, Matthew ; Renaud, Philippe

In: Proceedings of the 1st Europe-Asia Congress on Metatronics, 1996, p. 12-17

Miniaturized, integrated sensors and actuaturs are more and more used in microsystem applications. In order to promote their use further, specialists must make them more accessible to System designers. This can be done through behavioral modeling of sensors and actuators. The resulting models can be used in conjunction with models of the associated electronics to simulate a complete microsystem....

Université de Neuchâtel

Simulation and design of a three axis navigation microsystem based on micromachined sensors

Ansel, Y. ; Lerch, Philippe ; Renaud, Philippe ; Paoletti, F. ; Grétillat, M.-A. ; de Rooij, Nicolaas F. ; Schröpfer, G. ; Ballandras, S. ; de Labachelerie, M. ; Marselli, C. ; Amann, Hans Peter ; Pellandini, Fausto

In: MicroSim II (Simutation and design of microsystems and microstructures), 1997, vol. 2, p. 107-116

The project presented in this paper aims at defining the limits of microsystems through the realisation of a navigation system based on inertial microsensors. The work includes (i) design, fabrication, characterisation of accelerometers and angular rate sensors, (ii) development of techniques for simulation of sensor behaviour, and (iii) design of a sensor data processing system.

Université de Neuchâtel

Modeling and simulation of electromechanical transducers in microsystems using an analog hardware description language

Romanowicz, Bart ; Laudon, Matthew ; Lerch, Philippe ; Renaud, Philippe ; Amann, Hans-Peter ; Boegli, Alexis ; Moser, Vincent ; Pellandini, Fausto

In: IEEE Proceedings of European Design and Test Conference (ED&TC), 1997, p. 119-123

The analytical modeling and simulation of conservative electrostatic, electromagnetic and electrodynamic transducers found in microsystems using a non-linear lumped-parameter approach is presented in this paper. A comparison is made between this approach and the linearized equivalent circuit method. All models of transducers are written in HDL-ATM, a proprietary analogue hardware description...