732 research outputs found
Les résidences aristocratiques du canton de Vienne Nord
La prospection du canton de Vienne Nord constitue le second volet de campagnes de prospections thĂ©matiques menĂ©es sur les rĂ©sidences aristocratiques mĂ©diĂ©vales et modernes du Viennois. Le premier volet, qui a eu lieu en 2013, sâest portĂ© sur le canton de Saint-Jean-de-Bournay. La rĂ©alisation de ces deux opĂ©rations avait pour objectif de dresser une carte diachronique de lâimplantation des rĂ©sidences aristocratiques en Viennois. La prospection du canton de Vienne Nord visait au recensement de ..
Les résidences aristocratiques du viennois, Canton de Saint-Jean-de-Bournay
Code INSEE de la commune : 38035, 38094, 38231, 38232, 38346, 38351, 38399, 38555Lien Atlas (MCC) :http://atlas.patrimoines.culture.fr/atlas/trunk/index.php?ap_theme=DOM_2.01.02&ap_bbox=5.109;45.463;5.182;45.530 La prospection menée sur le canton de Saint-Jean-de-Bournay visait à recenser les résidences aristocratiques se trouvant sur le territoire des quinze communes qui le composent. Pour mener cette opération à bien, le parti a été pris de réaliser une étude diachronique au cours de laquel..
ChĂątonnay â Motte castrale de ChĂąteauvieux
Le site de ChĂąteauvieux est un site castral du Moyen Ăge central, constituĂ© de deux mottes disposĂ©es Ă chaque extrĂ©mitĂ© dâune colline oblongue dominant lâactuel village de ChĂątonnay. Ce site, bien que connu des historiens et archĂ©ologues depuis les annĂ©es 1970, nâa, Ă lâheure actuelle, fait lâobjet dâaucune campagne archĂ©ologique, tant et si bien quâil demeure mĂ©connu. La campagne de relevĂ©s microtopographiques menĂ©e durant le mois dâaoĂ»t 2014 avait pour objectif de vĂ©rifier le potentiel arch..
Transmission enhancement through square coaxial apertures arrays in metallic film: when leaky modes filter infrared light
We consider arrays of square coaxial apertures in a gold layer and study
their diffractive behavior in the far infrared region. These structures exhibit
a resonant transmission enhancement that is used to design tunable bandpass
filters. We provide a study of their spectral features and show by a modal
analysis that the resonance peak is due to the excitation of leaky modes of the
open photonic structure. Fourier transform infrared (FTIR) spectrophotometry
transmission measurements of samples deposited on Si substrate show good
agreement with numerical results and demonstrate angular tolerance up to 30
degrees of the fabricated filters.Comment: 4 pages, 3 figure
Resonant metamaterial absorbers for infrared spectral filtering: quasimodal analysis, design, fabrication and characterization
We present a modal analysis of metal-insulator-metal (MIM) based
metamaterials in the far infrared region. These structures can be used as
resonant reflection bandcut spectral filters that are independent of the
polarization and direction of incidence because of the excitation of quasimodes
(modes associated with a complex frequency) leading to quasi-total absorption.
We fabricated large area samples made of chromium nanorod gratings on top of
Si/Cr layers deposited on silicon substrate and measurements by Fourier
Transform spectrophotometry show good agreement with finite element
simulations. A quasimodal expansion method is developed to obtain a reduced
order model that fits very well full wave simulations and that highlights
excitation conditions of the modes.Comment: 8 pages, 7 figure
Herbarium X-ray fluorescence screening for nickel, cobalt and manganese hyperaccumulator plants in the flora of Sabah (Malaysia, Borneo Island)
Sabah (Malaysia) on the Island of Borneo has high plant diversity (>8000 species) occurring on a wide range of soils, including ultramafic soils which are known to host hyperaccumulator plants. In this study a new approach (âHerbarium X-ray Fluorescence Ionomicsâ) was used to obtain elemental data from herbarium specimens using non-destructive X-ray Fluorescence spectroscopy analysis. In total ~7300 specimens were thus analysed for nickel, cobalt, and manganese concentrations at the Herbarium of the Forest Research Centre (FRC) in Sepilok, Sabah. The measurements led to recording a total of 759 specimens (originating from 17 families in 30 genera and 74 species) as trace element hyperaccumulators, including 28 nickel hyperaccumulator species (in 10 families, 17 genera), 12 cobalt hyperaccumulator species (in 3 families, 7 genera), and 51 manganese hyperaccumulator species (in 12 families, 24 genera). The outcomes of this research demonstrate that handheld XRF is highly useful approach for hyperaccumulator plant discovery in herbarium collections that has the potential to add vast numbers of hyperaccumulating taxa to the global inventory
The first tropical âmetal farmâ: some perspectives from field and pot experiments
Agromining is the chain of processes of phytoextraction of economically valuable elements by selected hyperaccumulator plants, and subsequent processing of biomass to produce targeted metals or commercial compounds of high value. Although substantial unrealized opportunities exist for developing economic nickel (Ni) agromining in the tropics, this technology has remained relatively unexplored. This study investigated the soil chemistry of a newly established tropical âmetal farmâ and elucidated the performance of a prospective âmetal cropâ species (Phyllanthus rufuschaneyi) to be used in a large-scale tropical Ni agromining program on ultramafic soils in Sabah (Malaysia). We found that a major portion of the site (>90%) had high total Ni concentrations (>2000 ÎŒg g) in the soil (shallow Eutric Cambisol Magnesic). This study also recorded high phytoavailable soil Ni concentrations in the field site, which is a desired property of soils intended for Ni agromining. Moreover, the average soil pH of the field (pH 6.4) is ideal for maximum Ni uptake in the local candidate species. We recorded low concentrations of Ca, K and P, suggesting the need for a fertilizer regime in the farm. The extraordinary shoot Ni concentrations (>2 wt%), coupled with the high purity of the âbio-oreâ derived from Phyllanthus rufuschaneyi, confirm its high potential for economic Ni agromining. The success of our first field trial is critical to provide âreal-lifeâ evidence of the value of large-scale tropical âmetal farmingâ. Research priorities include the need to intensify the search for candidate species, determine their agronomy, develop mass propagation methods, and to test technologies to process the biomass to recover valuable products
Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era
The LHCb Upgrade II will fully exploit the flavour-physics opportunities of the HL-LHC, and study additional physics topics that take advantage of the forward acceptance of the LHCb spectrometer. The LHCb Upgrade I will begin operation in 2020. Consolidation will occur, and modest enhancements of the Upgrade I detector will be installed, in Long Shutdown 3 of the LHC (2025) and these are discussed here. The main Upgrade II detector will be installed in long shutdown 4 of the LHC (2030) and will build on the strengths of the current LHCb experiment and the Upgrade I. It will operate at a luminosity up to 2Ă1034
cmâ2sâ1, ten times that of the Upgrade I detector. New detector components will improve the intrinsic performance of the experiment in certain key areas. An Expression Of Interest proposing Upgrade II was submitted in February 2017. The physics case for the Upgrade II is presented here in more depth. CP-violating phases will be measured with precisions unattainable at any other envisaged facility. The experiment will probe b â sl+lâand b â dl+lâ transitions in both muon and electron decays in modes not accessible at Upgrade I. Minimal flavour violation will be tested with a precision measurement of the ratio of B(B0 â ÎŒ+ÎŒâ)/B(Bs â ÎŒ+ÎŒâ). Probing charm CP violation at the 10â5 level may result in its long sought discovery. Major advances in hadron spectroscopy will be possible, which will be powerful probes of low energy QCD. Upgrade II potentially will have the highest sensitivity of all the LHC experiments on the Higgs to charm-quark couplings. Generically, the new physics mass scale probed, for fixed couplings, will almost double compared with the pre-HL-LHC era; this extended reach for flavour physics is similar to that which would be achieved by the HE-LHC proposal for the energy frontier
LHCb upgrade software and computing : technical design report
This document reports the Research and Development activities that are carried out in the software and computing domains in view of the upgrade of the LHCb experiment. The implementation of a full software trigger implies major changes in the core software framework, in the event data model, and in the reconstruction algorithms. The increase of the data volumes for both real and simulated datasets requires a corresponding scaling of the distributed computing infrastructure. An implementation plan in both domains is presented, together with a risk assessment analysis
Multidifferential study of identified charged hadron distributions in -tagged jets in proton-proton collisions at 13 TeV
Jet fragmentation functions are measured for the first time in proton-proton
collisions for charged pions, kaons, and protons within jets recoiling against
a boson. The charged-hadron distributions are studied longitudinally and
transversely to the jet direction for jets with transverse momentum 20 GeV and in the pseudorapidity range . The
data sample was collected with the LHCb experiment at a center-of-mass energy
of 13 TeV, corresponding to an integrated luminosity of 1.64 fb. Triple
differential distributions as a function of the hadron longitudinal momentum
fraction, hadron transverse momentum, and jet transverse momentum are also
measured for the first time. This helps constrain transverse-momentum-dependent
fragmentation functions. Differences in the shapes and magnitudes of the
measured distributions for the different hadron species provide insights into
the hadronization process for jets predominantly initiated by light quarks.Comment: All figures and tables, along with machine-readable versions and any
supplementary material and additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-013.html (LHCb
public pages
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