18 research outputs found
Lymphome t/nk primitif du larynx : localisation inhabituelle de lymphome extranodal
Nous rapportons un cas de lymphome extranodal T/Nk primitif du larynx. il sâagit dâun patient ĂągĂ© de 22 ans qui sâĂ©tait prĂ©sentĂ© pour une dysphonie chronique associĂ©e Ă une dyspnĂ©e inspiratoire. une chimiothĂ©rapie protocole SMiLE avec radiothĂ©rapie ont Ă©tĂ© instituĂ©s avec obtention dâune rĂ©mission complĂšte. Huit mois plus tard, le patient prĂ©sentait une rĂ©cidive de la tumeur avec un oedĂšme palpĂ©bral et une obstruction du canal lacrymonasal. LâĂ©volution a Ă©tĂ© fatale suite Ă une aspergillose invasive en cours de chimiothĂ©rapie.Mots clĂ©s : lymphome, larynx.A rare case of primary laryngeal T/Nk- cell lymphoma, nasal type is reported. The patient was 22-year old male who presented with dysphonia, dyspnea. Chemotherapy protocol SMiLE and radiotherapy were instituted with complete remission of the tumor. Eight months afterward, he presented with tumor recurrence, palpebral edema, obstruction of the lacrymonasal duct. He died within few days with invasive aspergillosis while he was receiving chemotherapy SMiLE regimen.Keyswords : lymphoma, larynx
Measurement of the (, Ar) total hadronic cross section at the LArIAT experiment
We present the first measurement of the negative pion total hadronic cross
section on argon, which we performed at the Liquid Argon In A Testbeam (LArIAT)
experiment. All hadronic reaction channels, as well as hadronic elastic
interactions with scattering angle greater than 5~degrees are included. The
pions have a kinetic energies in the range 100-700~MeV and are produced by a
beam of charged particles impinging on a solid target at the Fermilab Test Beam
Facility. LArIAT employs a 0.24~ton active mass Liquid Argon Time Projection
Chamber (LArTPC) to measure the pion hadronic interactions. For this
measurement, LArIAT has developed the ``thin slice method", a new technique to
measure cross sections with LArTPCs. While generally higher than the
prediction, our measurement of the (,Ar) total hadronic cross section is
in agreement with the prediction of the Geant4 model when considering a model
uncertainty of 5.1\%.Comment: 15 pages, 15 figures, 3 tables, accepted by PR
The Liquid Argon In A Testbeam (LArIAT) Experiment
The LArIAT liquid argon time projection chamber, placed in a tertiary beam of
charged particles at the Fermilab Test Beam Facility, has collected large
samples of pions, muons, electrons, protons, and kaons in the momentum range
300-1400 MeV/c. This paper describes the main aspects of the detector and
beamline, and also reports on calibrations performed for the detector and
beamline components
Calorimetry for low-energy electrons using charge and light in liquid argon
Precise calorimetric reconstruction of 5-50 MeV electrons in liquid argon
time projection chambers (LArTPCs) will enable the study of astrophysical
neutrinos in DUNE and could enhance the physics reach of oscillation analyses.
Liquid argon scintillation light has the potential to improve energy
reconstruction for low-energy electrons over charge-based measurements alone.
Here we demonstrate light-augmented calorimetry for low-energy electrons in a
single-phase LArTPC using a sample of Michel electrons from decays of stopping
cosmic muons in the LArIAT experiment at Fermilab. Michel electron energy
spectra are reconstructed using both a traditional charge-based approach as
well as a more holistic approach that incorporates both charge and light. A
maximum-likelihood fitter, using LArIAT's well-tuned simulation, is developed
for combining these quantities to achieve optimal energy resolution. A sample
of isolated electrons is simulated to better determine the energy resolution
expected for astrophysical electron-neutrino charged-current interaction final
states. In LArIAT, which has very low wire noise and an average light yield of
18 pe/MeV, an energy resolution of is achieved. Samples are then generated with varying wire noise levels
and light yields to gauge the impact of light-augmented calorimetry in larger
LArTPCs. At a charge-readout signal-to-noise of S/N 30, for example,
the energy resolution for electrons below 40 MeV is improved by 10%,
20%, and 40% over charge-only calorimetry for average light
yields of 10 pe/MeV, 20 pe/MeV, and 100 pe/MeV, respectively
Considering Soil Potassium Pools with Dissimilar Plant Availability
Soil potassium (K) has traditionally been portrayed as residing in four functional pools: solution K, exchangeable K, interlayer (sometimes referred to as âfixedâ or ânonexchangeableâ) K, and structural K in primary minerals. However, this four-pool model and associated terminology have created confusion in understanding the dynamics of K supply to plants and the fate of K returned to the soil in fertilizers, residues, or waste products. This chapter presents an alternative framework to depict soil K pools. The framework distinguishes between micas and feldspars as K-bearing primary minerals, based on the presence of K in interlayer positions or three-dimensional framework structures, respectively; identifies a pool of K in neoformed secondary minerals that can include fertilizer reaction products; and replaces the âexchangeableâ K pool with a pool defined as âsurface-adsorbedâ K, identifying where the K is located and the mechanism by which it is held rather than identification based on particular soil testing procedures. In this chapter, we discuss these K pools and their behavior in relation to plant K acquisition and soil K dynamics