44 research outputs found

    Assessing the Potential of Intra-specific Biodiversity towards Adaptation of Irrigated and Rain-fed Italian Production Systems to Future Climate

    Get PDF
    AbstractThe study addresses the biophysical dimension of adaptation. It illustrates and applies a framework to evaluate options for adaptation by identifying cultivars optimally adapted to expected climate conditions, building on existing crops intra-specific biodiversity. The aim is to reduce the vulnerability of current production systems without altering the pattern of current species and cultivation systems.Adaptability is assessed through a three-step approach that involves: 1) evaluation of indicators of expected thermal and hydrological conditions within the specific landscape and production system; 2) determination, for a set of cultivars, of cultivar- specific thermal and hydrological requirements to attain the desirable yield; 3) identification, as options for adaptation, of the cultivars for which expected climate conditions match the climatic requirements. The approach relies on a process-based simulation model of water flow in the soil-plant-atmosphere system for the calculation of hydrological indicators. Thermal indicators are derived by means of phenological models. Empirical functions of cultivars yield response to water availability are used to determine cultivar-specific hydrological requirements, whereas cultivars thermal requirements are estimated through phenological observations.In a future climate case (2021-2050) three case-studies are analyzed: 1) a system dominated by rain-fed crops (olive, winegrapes, durum wheat) in a hilly area of southern Italy; 2) irrigated fruit crops (peach, pear) in the Po Valley; 3) maize and tomato crop in an irrigated plain of southern Italy.Cultivars adapted to the future climate have been identified for rain-fed crops (e.g. 5 olive cvs). For irrigated crops we have evaluated adaptability for optimal and deficit irrigation schedules, accounting for site-specific soils hydrological properties. Options for adaptations have been identified as a combination of cultivars, soils and irrigation schedules (e.g 2 tomato cvs and 3 maize hybrids have been identified as options for adaptation at scarce water availability). Moreover, in the case of fruit crops, accounting for phenological changes highlighted the impact on irrigation water requirements of the interaction between phenology and the intra-annual distribution of precipitation

    Prevalence of Chromosomally Integrated Human Herpesvirus 6 in Patients with Human Herpesvirus 6–Central Nervous System Dysfunction

    Get PDF
    AbstractWe identified 37 hematopoietic cell transplantation recipients with human herpesvirus 6 (HHV-6) central nervous system dysfunction and tested donor-recipient pairs for chromosomally integrated HHV-6 (ciHHV-6). One patient had ciHHV-6A with possible HHV-6A reactivation and encephalitis. There was no ciHHV-6 enrichment in this group, but larger studies are needed to determine if patients with ciHHV-6 are at increased risk for HHV-6–associated diseases or other complications

    Détection de défaut dans les pommes par mesure de diffraction en gamme millimétrique

    No full text
    National audienceDans ce résumé, nous présentons les résultats de travaux exploratoires sur la détection des défauts dans les pommes par mesure de diffraction en gamme millimétrique. Nous montrons de premiers résultats obtenus sur pommes saines et abîmées à 92 GHz. Afin d’étudier séparément les effets de taille, composition moyenne de la pomme et altérations éventuelles, nous avons fabriqué des fantômes en cours de mesure

    The EGIM, a generic instrumental module to equip EMSO observatories

    No full text
    The EGIM aims to set up a number of ocean locations where the same set of core variables, including temperature, conductivity, pressure, dissolved O2, turbidity, ocean currents, and passive acoustics, are measured homogeneously: using identical hardware, the same sensor references, the same qualification methods, the same calibration methods, the same data format and access, and the same maintenance procedures. The EGIM provides all the services required to ensure the best measurement quality and long-term reliability in line with the Best Practices Handbook by FIXO3 and ESONET-EMSO Label, these services being sensor power distribution, time stamping, data storage and backup, protection against the environment and against fouling and bi-directional communication services… The EGIM is flexible and matches all EMSO site and discipline specific requirements. Operating modes, power requirements, mechanical design, embedded software enable the EGIM to adapt to the various EMSO node configurations: mooring line, sea bed station, cabled or non-cabled and surface buoy.  Its compact and its modularity covers an array of deployment scenarios including being able to accommodate new instruments. This will be a key point to the modularity, inter-operability and capacity of the future evolution of the system. Having the EGIM as the sole reference for all nodes is a crucial step towards standardization, increasing global reliability and reducing costs across EMSO

    Tri de pommes par imagerie microonde

    No full text
    National audienceL’objectif de ces travaux est de proposer une méthode non destructive de tri entre fruits sains et abîmés. Nous combinons des mesures millimétriques à une technique de machine à vecteurs de support (SVM). Dans un premier temps, nous utilisons la diversité d’angle de balayage et de fréquences pour un taux de succès de 94%. Nous évaluons ensuite l’influence des paramètres physiques sur la base de données et nous explorons de nouveaux scénarios avec d’autres fruits

    Non-destructive Control of Fruit Quality via Millimeter Waves and Classification Techniques

    No full text
    International audienceFast and efficient non-Destructive evaluation methods for food control is still an ongoing field of research. Wehave recently proposed to combine W-band imaging with nonlinear SVM classifier to sort out healthy from damaged fruits for a single variety of fruits. We have tested it on apples and peaches separately with a mean accuracy of 96%. We have also shown the limitation of a bi-class SVM since it has failed to sort healthy from damaged fruits when the set of fruits was composed of a mix of apples and peaches. In this paper, we continue to explore the capability of SVM associated with mmW and lowTHz measurements. Firstly, we tackle the problem of classifying a mix of fruits with a multi-class SVM using the Digital Binary Tree architecture. With this method, the error rate does not exceed 2%. Secondly, we move from W- to D-band (low-THz). The main reason is the increase of the lateral resolution and the possibility to have more compact systems in the view of an industrial deployment. We start our D-band investigations with range measurements to estimate the average permittivity of the apple in this frequency bandwidth. We have found a drastic decrease compared to the microwave region. It is consistent with the behavior of the water, which is one of the main components of the apple. Then we have trained the SVM with the D-band database and finally performed the classification on unknown samples and obtained an accuracy of 100%
    corecore