Search results for "NIR"

Comparison of Crop Trait Retrieval Strategies Using UAV-Based VNIR Hyperspectral Imaging.

2021

Hyperspectral cameras onboard unmanned aerial vehicles (UAVs) have recently emerged for monitoring crop traits at the sub-field scale. Different physical, statistical, and hybrid methods for crop trait retrieval have been developed. However, spectra collected from UAVs can be confounded by various issues, including illumination variation throughout the crop growing season, the effect of which on the retrieval performance is not well understood at present. In this study, four retrieval methods are compared, in terms of retrieving the leaf area index (LAI), fractional vegetation cover (fCover), and canopy chlorophyll content (CCC) of potato plants over an agricultural field for six dates duri…

Prediction of soil texture distributions using VNIR-SWIR reflectance spectroscopy

2013

Abstract Reflectance spectroscopy provides an alternate method to non-destructively characterize key soil properties. Different approaches, including chemometrics techniques or specific absorption features, have been proposed to estimate soil properties from visible and near-infrared (VNIR, 400-1200 nm) and shortwave infrared (SWIR, 1200-2500 nm) reflectance domains. The main goal of this study was to test the performance of two distinct methods for soil texture estimation by VNIR-SWIR reflectance measurements: i) the Continuum Removal (CR) technique that was used to correlate specific spectral absorption features with clay, silt and sand content, and ii) the Partial Least-Squares Regressio…

Combe-Grenal (Domme).

2016

2 pages; National audience

Surgical management of moderate ischemic mitral valve regurgitation: Where do we stand?

2014

Ischemic mitral regurgitation (IMR) represents a common complication after myocardial infarction. The valve is anatomically normal and the incompetence is the result of papillary muscles displacement and annular dilatation, causing leaflets tethering. Functionally the leaflets present a restricted systolic motion due to tethering forces that displaces the coaptation surface toward the left ventricle apex. The patients present poor left ventricular function at the time of surgery and the severity of the mitral regurgitation increases the risk of mortality. Currently there is general agreement to treat surgically severe IMR nevertheless strong evidences for patient with moderate insufficiency…

From the memory of the experience to the relationship with the retailer : a theoretical and methodological exploration in the field of retail

2015

Our research proposes an enrichment of the experiential paradigm by focusing on the consequences of experience. We support the view that an approach by the memory of the experience can partly compensate for the limitations of satisfaction in understanding the retailer-customer relationship. Our literature review leads us to a better understanding of the relationship between experience, memory of the experience and remembered experience. The completion of two longitudinal studies helps to: [1]. conceptualize dimensions of the memory of the shopping experience; [2]. understand the evolution of memory over time; [2]. study its effects on satisfaction, retailer attitude, retailer commitment, an…

Can differences in microbial abundances help explain enhanced N2O emissions in a permanent grassland under elevated atmospheric CO2?

2011

Developments in the dehydrogenative electrochemical synthesis of 3,3′,5,5′-tetramethyl-2,2′-biphenol

2021

Abstract The symmetric biphenol 3,3′,5,5′‐tetramethyl‐2,2′‐biphenol is a well‐known ligand building block and is used in transition‐metal catalysis. In the literature, there are several synthetic routes for the preparation of this exceptional molecule. Herein, the focus is on the sustainable electrochemical synthesis of 3,3′,5,5′‐tetramethyl‐2,2′‐biphenol. A brief overview of the developmental history of this inconspicuous molecule, which is of great interest for technical applications, but has many challenges for its synthesis, is provided. The electro‐organic method is a powerful, sustainable, and efficient alternative to conventional synthesis to obtain this symmetric biphenol up to the …

L'Analogie chez Aristote

2021

Revue de philosophie dont l’objet est de montrer, d’interroger ou d’évaluer les comparaisons effectives dans les différents champs disciplinaires, Analogia est une publication scientifique annuelle de l’IPC.Chaque numéro réunit un conseil scientifique nouveau chargé de sélectionner les contributions en double aveugle.L’Analogie chez Aristote.Sous la direction d’Emmanuel Brochier.Conseil scientifique :- Katerina Ierodiakonou (Genève – Athènes)- André Laks (Paris)- Benjamin C. Morison (Princeton)- Jean-Luc Solère (Boston)Sommaire :- Présentation, par Emmanuel Brochier, p. 5 ;- Christof Rapp : "Spotting similarities between disparate items" Observations on the use of analogy in Aristotle’s met…

Amorphous Ropinirole-Loaded Mucoadhesive Buccal Film: A Potential Patient-Friendly Tool to Improve Drug Pharmacokinetic Profile and Effectiveness

2020

Nowadays the therapeutic strategies to manage Parkinson&rsquo

Quand les socialistes inventaient l’avenir : presse, théories et expériences (1825-1860)

2015

International audience; "Entre 1825 et 1860, les socialistes, dans les premiers balbutiements de leur histoire, dénoncent les désordres et les injustices de leur temps tout en élaborant une nouvelle connaissance du lien social, de la solidarité et de l’union, se plaçant au croisement de la science, de la philosophie ou de la religion pour revendiquer un droit à l’action et à l’expérience. L’une des armes maîtresses dont ceux-ci se saisissent pour leurs combats est le journal : du Globe au Nouveau Monde, de La Démocratie pacifique au Tocsin des travailleurs, de La Revue du progrès à La Revue indépendante, de L’Écho de la fabrique à L’Atelier.« Quand les socialistes inventaient l’avenir » est…