Olivier Robert

Temporal Patterns of Climate Variability and Malaria Incidences Among Children (0-5) Years in Uganda: A Time Series Analysis

Olivier Robert, Robert Wamala, Hellen Namawejje, John C. Rek et autres

Background: Malaria remains a major public health challenge in Uganda, particularly among children under five years of age. Between 2019 and 2023, the prevalence increased with age, from 3% in infants under six months to 12% in children aged 48–59 months, and …

Ouganda (code pays fourni par la source)

Temporal Patterns of Climate Variability and Malaria Incidences Among Children (0-5) Years in Uganda: A Time Series Analysis

Olivier Robert, Robert Wamala, Hellen Namawejje, Martin Kayitale Mbonye et autres

Background: Malaria remains a major public health challenge in Uganda, particularly among children under five years of age. Between 2019 and 2023, the prevalence increased with age, from 3% in infants under six months to 12% in children aged 48–59 months, and …

Ouganda (code pays fourni par la source)

Remote optical interferometric displacement technology development for planetology

Frédéric Guattari, S. de Raucourt, Gabrielle Chabaud, Sylvain Tillier et autres

The Apollo seismic experiment yielded unique seismology data from the Moon. Howeverunderstanding of the Moon’s interior structure remains constrained by the limitations of theApollo’s sensors. Fifty years later, the Mars seismometer Insight/SEIS demonstrated reducedself-noise and enhanced resolution. A spare model will be …

fr (code pays fourni par la source)

Low frequency noise elimination technique for 24-bit Σ-Δ data acquisition systems

Shaobo Qu, Olivier Robert, Philippe Henri Lognonné, Zebing Zhou et autres

Low frequency 1/f noise is one of the key limiting factors of high precision measurement instruments. In this paper, digital correlated double sampling is implemented to reduce the offset and low frequency 1/f noise of a data acquisition system with 24-bit sigma …

fr, cn (code pays fourni par la source)

Evaluating surface and subsurface water storage variations at small time and space scales from relative gravity measurements in semiarid Niger

Julia Pfeffer, Cédric Champollion, Guillaume Favreau, B. Cappelaere et autres

[1] The acquisition of reliable data sets representative of hydrological regimes and their variations is a critical concern for water resource assessment. For the subsurface, traditional approaches based on probe measurements, core analysis, and well data can be laborious, expensive, and highly …

fr, Niger, tw, au (code pays fourni par la source)

Spatial variability of the subsurface water storage revealed by relative gravity measurements in Southwest Niger

Julia Pfeffer, Cédric Champollion, Guillaume Favreau, J. Hinderer et autres

Développement d'un oscillateur analogique d'interface pour résonateur sur technologie CMOS en haute température (200°C) : application à un capteur MEMS de pression (1000 bar)

Olivier Robert

A 200°C automatic gain controlled oscillator for MEMS resonator with an MRC transimpedance

Olivier Robert, Gilles Amendola, Hua Chen

A MEMS (micro electro-mechanical system) resonator oscillator is presented in this paper. It is based on a transimpedance amplifier (current to voltage converter) with a voltage controllable gain. The complete architecture of the oscillator is designed to control the oscillation amplitudes. The …

fr (code pays fourni par la source)

Air damping of mechanical microbeam resonators with optical excitation and optical detection

Hua Chen, David Drilhole, Olivier Robert

This paper is dedicated to both Finite Element Method (FEM) simulations and optical measurements of the mechanical quality factor dependence on air pressure of microbeam resonators. Firstly, a summary of previous theoretical works is given, for two different air cavity cases. Different …

fr (code pays fourni par la source)

Large amplitude effects on the resonant frequency of electrostatically driven microresonators: theory and experimental validation

Hua Chen, Olivier Français, Olivier Gigan, Olivier Robert

This paper is dedicated to a global study of large amplitude effects of electrostatically driven microresonators. Special attention is given to the electrostatic soft spring effect. A theoretical description of the amplitude-induced soft spring effect is given to an electrostatically driven parallel-plate …

fr (code pays fourni par la source)

Fabrication and characterization of resonant SOI micromechanical silicon sensors based on DRIE micromachining, freestanding release process and silicon direct bonding

Olivier Gigan, Hua Chen, Olivier Robert, S. Renard et autres

This paper is dedicated to the fabrication and technological aspect of a silicon microresonator sensor. The entire project includes the fabrication processes, the system modelling/simulation, and the electronic interface. The mechanical model of such resonator is presented including description of frequency stability …

fr (code pays fourni par la source)

Design and fabrication of an analog ASIC interfacing a μ-resonant capacitive MEMS sensor in a high-temperature environment (200°C)

Olivier Robert, Olivier Gigan, Hua Chen, Gilles Amendola

This paper is dedicated to an electronic oscillator designed to control a MEMS (Micro-Electro-Mechanical System) sensor based on a clamped-clamped silicon micro-beam resonator. Due to the high-temperature environment (200°C) and the MEMS specificities, a specific architecture (MRC transimpedance) was implemented in a …

fr (code pays fourni par la source)