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High-accuracy inertial measurements with cold-atom sensors
[article]
2020
arXiv
pre-print
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The research on cold-atom interferometers gathers a large community of about 50 groups worldwide both in the academic and now in the industrial sectors. The interest in this sub-field of quantum sensing and metrology lies in the large panel of possible applications of cold-atom sensors for measuring inertial and gravitational signals with a high level of stability and accuracy. This review presents the evolution of the field over the last 30 years and focuses on the acceleration of the research
arXiv:2003.12516v1
fatcat:fu2yal75fvc3hpdh4n5rvzmyke
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... effort in the last 10 years. The article describes the physics principle of cold-atom gravito-inertial sensors as well as the main parts of hardware and the expertise required when starting the design of such sensors. It then reviews the progress in the development of instruments measuring gravitational and inertial signals, with a highlight on the limitations to the performances of the sensors, on their applications, and on the latest directions of research.
Dépister et diagnostiquer l'insuffisance veineuse
2014
Actualités Pharmaceutiques
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L'insuffisance veineuse est un symptôme fréquemment rapporté, essentiellement par les femmes. Face aux plaintes caractéristiques des patientes, le pharmacien se trouve en première ligne pour dépister et diagnostiquer cette pathologie qui ne doit pas être prise à la légère, compte tenu des complications possibles. De nombreux facteurs favorisants doivent être pris en compte tels que le nombre de grossesses, la prise d'un contraceptif, le tabagisme, le surpoids, la station debout ou le port de
doi:10.1016/j.actpha.2014.01.004
fatcat:xnfzf235bjgw7c6fajtpggntaa
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... rges. Screening for and diagnosing venous insufficiency. Venous insufficiency is a symptom which is frequently reported, in particular by women. Patients will often describe their complaints to the pharmacist who is on the frontline for the screening and diagnosis of this pathology which should not be taken lightly, given the potential complications. Numerous predisposing causes must be taken into account such as the number of pregnancies, contraception, smoking, overweight, standing and the carrying of heavy loads.
A compact differential gravimeter at the quantum projection noise limit
[article]
2022
arXiv
pre-print
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Atom interferometry offers new perspectives for geophysics and inertial sensing. We present the industrial prototype of a new type of quantum-based instrument: a compact, transportable, differential quantum gravimeter capable of measuring simultaneously the absolute values of both gravitational acceleration, g, and its vertical gradient, Γ_zz. While the sensitivity to g is competitive with the best industrial gravimeters, the sensitivity on Γ_zz reaches the limit set by quantum projection
arXiv:2201.03345v1
fatcat:pp6crlgmufbnjbgvrwsk4c23be
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... leading to an unprecedented long-term stability of 0.1 E (1E=1× 10^-9s^-2). This unique, dual-purpose instrument, paves the way for new applications in geophysics, civil engineering, and gravity-aided navigation, where accurate mapping of the gravitational field plays an important role.
High-accuracy inertial measurements with cold-atom sensors
2020
AVS Quantum Science
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To cite this version: Remi Geiger, Arnaud Landragin, Sébastien Merlet, Franck Pereira dos Santos. High-accuracy inertial measurements with cold-atom sensors. ...
doi:10.1116/5.0009093
fatcat:mrwwvvxg3zdstnggotshnijjpu
Underground operation at best sensitivity of the mobile LNE-SYRTE Cold Atom Gravimeter
[article]
2014
arXiv
pre-print
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Low noise underground environments offer conditions allowing to assess ultimate performance of high sensitivity sensors such as accelerometers, gyrometers, seismometers... Such facilities are for instance ideal for observing the tiny signals of interest for geophysical studies. Laboratoire Souterrain à Bas Bruit (LSBB) in which we have installed our cold atom gravimeter, provides such an environment. We report here the best short term sensitivity ever obtained without any ground vibration
arXiv:1404.6722v1
fatcat:y5qznrindnfq3gzm7b5i5b2ol4
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... ion system with such an instrument: 10^-8m.s^-2 in 100 s measurement time.
Link between carrot leaf secondary metabolites and resistance to Alternaria dauci
2018
Scientific Reports
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Alternaria Leaf Blight (ALB), caused by the fungus Alternaria dauci, is the most damaging foliar disease affecting carrots (Daucus carota). In order to identify compounds potentially linked to the resistance to A. dauci, we have used a combination of targeted and non-targeted metabolomics to compare the leaf metabolome of four carrot genotypes with different resistance levels. Targeted analyses were focused on terpene volatiles, while total leaf methanolic extracts were subjected to
doi:10.1038/s41598-018-31700-2
pmid:30213972
pmcid:PMC6137067
fatcat:2c7lq7tdjjfa3gan5eoppb53cq
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... analyses using liquid chromatography couple to high-resolution mass spectrometry. Differences in the accumulation of major metabolites were highlighted among genotypes and some of these metabolites were identified as potentially involved in resistance or susceptibility. A bulk segregant analysis on F3 progenies obtained from a cross between one of the resistant genotypes and a susceptible one, confirmed or refuted the hypothesis that the metabolites differentially accumulated by these two parents could be linked to resistance.
A Multi Linear Regression Model to Derive Dust PM10 in the Sahel Using AERONET Aerosol Optical Depth and CALIOP Aerosol Layer Products
2020
Remote Sensing
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Due to a limited number of monitoring stations in Western Africa, the impact of mineral dust on PM10 surface concentrations is still poorly known. We propose a new method to retrieve PM10 dust surface concentrations from sun photometer aerosol optical depth (AOD) and CALIPSO/CALIOP Level 2 aerosol layer products. The method is based on a multi linear regression model that is trained using co-located PM10, AERONET and CALIOP observations at 3 different locations in the Sahel. In addition to the
doi:10.3390/rs12183099
doaj:21f34ca1aab344758a5c3e8774f47782
fatcat:h4w5opdw2zflvil2mjjcj3vb6a
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... un photometer AOD, the regression model uses the CALIOP-derived base and top altitude of the lowermost dust layer, its AOD, the columnar total and columnar dust AOD. Due to the low revisit period of the CALIPSO satellite, the monthly mean annual cycles of the parameters are used as predictor variables rather than instantaneous observations. The regression model improves the correlation coefficient between monthly mean PM10 and AOD from 0.15 (AERONET AOD only) to 0.75 (AERONET AOD and CALIOP parameters). The respective high and low PM10 concentration during the winter dry season and summer season are well produced. Days with surface PM10 above 100 μg/m3 are better identified when using the CALIOP parameters in the multi linear regression model. The number of true positives (actual and predicted concentrations above the threshold) is increased and leads to an improvement in the classification sensitivity (recall) by a factor 1.8. Our methodology can be extrapolated to the whole Sahel area provided that satellite derived AOD maps are used in order to create a new dataset on population exposure to dust events in this area.
Analysis of Suspended Particulate Matter and Its Drivers in Sahelian Ponds and Lakes by Remote Sensing (Landsat and MODIS): Gourma Region, Mali
2017
Remote Sensing
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Merlet processed MODIS data, Jean-Michel Martinez contributed MODIS algorithms and granulometry data. ...
Author Contributions: Elodie Robert, Laurent Kergoat, Manuela Grippa designed the study, performed the analyses and wrote the manuscript, Nogmana Soumaguel and Mamadou Diawara collected in situ data, Sébastien ...
doi:10.3390/rs9121272
fatcat:qrupklmkobfmno5uigrgrzqwjy
A prototype industrial laser system for cold atom inertial sensing in space
2019
European Physical Journal D : Atomic, Molecular and Optical Physics
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2019 pre-print arXiv:1908.10058v1 fatcat:5a3mhf5efragze2ijiasetccuu
We present the design, realization, characterization and testing of an industrial prototype of a laser system, which is based on frequency doubling of telecom lasers and features all key functionalities to drive a cold atom space gradiometer based on the architecture proposed in [Trimeche et al, 2019]. Testing was performed by implementing the laser system onto a ground based atomic sensor currently under development. The system reaches a Technology Readiness Level (TRL) of 4, corresponding to
doi:10.1140/epjd/e2019-100360-2
fatcat:svcw7jrk5zb4dk7h4fzmixkype
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... n operational validation in a controlled environment. The optical architecture of the system can be adapted to other space mission scenarios.
The results of CCM.G-K2.2017 key comparison
2020
Metrologia
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Geospatial Research Institute
(FGI), National Land Survey
of Finland
FG5X#221
Mirjam
Bilker-Koivula
Jyri Nä rä nen
5
France
LNE-SYRTE -Gé osciences
Montpellier -France
FG5#228
Sé bastien Merlet ...
doi:10.1088/0026-1394/57/1a/07002
fatcat:7kjl6jseqnd6le5f33a336mqqm
FMCW radar for the sense function of sense and avoid systems onboard UAVs
2013
Emerging Technologies in Security and Defence; and Quantum Security II; and Unmanned Sensor Systems X
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Rockwell Collins France (RCF) radar department is currently developing, in close collaboration with TNO in The Hague, The Netherlands, a Frequency Modulated Continuous Wave (FMCW) radar sensor dedicated to Obstacle Warning function and potentially to air traffic detection. The sensor combines flood light illumination and digital beam forming to accommodate demanding detection and coverage requirements. Performances have been evaluated in flight tests and results prove that such a radar sensor
doi:10.1117/12.2028518
fatcat:bcwg2acxnrfrfducrdfil35zvy
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... a good candidate for the Sense Function of Sense & Avoid Systems onboard UAV.
Comparison of 3 Absolute Gravimeters Based on Different Methods for the e-MASS Project
2011
IEEE Transactions on Instrumentation and Measurement
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2010 pre-print arXiv:1008.2884v1 fatcat:n5mwhqcykbbifnegvr26aie4keOther Versions
Merlet
II. PRESENTATION OF THE THREE GRAVIMETERS The three gravimeters involved in the comparison are national references for their respective country. ...
doi:10.1109/tim.2010.2099951
fatcat:julssdtybfcybcqvvlhrz2bmqa
Multisite evaluation of phenotypic plasticity for specialized metabolites, some involved in carrot quality and disease resistance
2021
PLoS ONE
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Renewed consumer demand motivates the nutritional and sensory quality improvement of fruits and vegetables. Specialized metabolites being largely involved in nutritional and sensory quality of carrot, a better knowledge of their phenotypic variability is required. A metabolomic approach was used to evaluate phenotypic plasticity level of carrot commercial varieties, over three years and a wide range of cropping environments spread over several geographical areas in France. Seven groups of
doi:10.1371/journal.pone.0249613
pmid:33798246
fatcat:tsy4ew2k2nfnxhmklgzz7putua
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... lites have been quantified by HPLC or GC methods: sugars, carotenoids, terpenes, phenolic compounds, phenylpropanoids and polyacetylenes. A large variation in root metabolic profiles was observed, in relation with environment, variety and variety by environment interaction effects in decreasing order of importance. Our results show a clear diversity structuration based on metabolite content. Polyacetylenes, β-pinene and α-carotene were identified mostly as relatively stable varietal markers, exhibiting static stability. Nevertheless, environment effect was substantial for a large part of carrot metabolic profile and various levels of phenotypic plasticity were observed depending on metabolites and varieties. A strong difference of environmental sensitivity between varieties was observed for several compounds, particularly myristicin, 6MM and D-germacrene, known to be involved in responses to biotic and abiotic stress. This work provides useful information about plasticity in the perspective of carrot breeding and production. A balance between constitutive content and environmental sensitivity for key metabolites should be reached for quality improvement in carrot and other vegetables.
Distribution of ticks, tick-borne pathogens and the associated local environmental factors including small mammals and livestock, in two French agricultural sites: the OSCAR database
2020
Biodiversity Data Journal
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. ¶, Merlet J. #, Noël V. ¶, Perez G. §,|, Picot D. #, Pion A. ‡, Poux V. ‡,
Quillery E. §, Toty C. ¶, Vaumourin E. ‡, Verheyden H. #, Vincent S. ‡, Vourc'h G. ...
doi:10.3897/bdj.8.e50123
pmid:32431559
pmcid:PMC7217980
fatcat:jughewxvorfsrajmea6oasn7sy
CCM.G-K2 key comparison
2015
Metrologia
Preserved Fulltext
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