2,447 research outputs found
The generation: present and future constraints on neutrino masses from cosmology and laboratory experiments
We perform a joint analysis of current data from cosmology and laboratory
experiments to constrain the neutrino mass parameters in the framework of
bayesian statistics, also accounting for uncertainties in nuclear modeling,
relevant for neutrinoless double decay () searches. We find
that a combination of current oscillation, cosmological and data
constrains () at 95\% C.L. for normal (inverted)
hierarchy. This result is in practice dominated by the cosmological and
oscillation data, so it is not affected by uncertainties related to the
interpretation of data, like nuclear modeling, or the exact
particle physics mechanism underlying the process. We then perform forecasts
for forthcoming and next-generation experiments, and find that in the case of
normal hierarchy, given a total mass of eV, and assuming a
factor-of-two uncertainty in the modeling of the relevant nuclear matrix
elements, it will be possible to measure the total mass itself, the effective
Majorana mass and the effective electron mass with an accuracy (at 95\% C.L.)
of , , respectively, as well as to be
sensitive to one of the Majorana phases. This assumes that neutrinos are
Majorana particles and that the mass mechanism gives the dominant contribution
to decay. We argue that more precise nuclear modeling will be
crucial to improve these sensitivities.Comment: v2: 6 pages, 3 figures, 1 table; added definition of parameter
minimal value from oscillation measurements; corrected confidence interval,
that in v1 were reported at 90% C.L. and misidentified as 95% C.L.; accepted
for publicatio
Dark Radiation after Planck
We present new constraints on the relativistic neutrino effective number
N_eff and on the Cosmic Microwave Background power spectrum lensing amplitude
A_L from the recent Planck 2013 data release. Including observations of the CMB
large angular scale polarization from the WMAP satellite, we obtain the bounds
N_eff = 3.71 +/- 0.40 and A_L = 1.25 +/- 0.13 at 68% c.l.. The Planck dataset
alone is therefore suggesting the presence of a dark radiation component at
91.1% c.l. and hinting for a higher power spectrum lensing amplitude at 94.3%
c.l.. We discuss the agreement of these results with the previous constraints
obtained from the Atacama Cosmology Telescope (ACT) and the South Pole
Telescope (SPT). Considering the constraints on the cosmological parameters, we
found a very good agreement with the previous WMAP+SPT analysis but a tension
with the WMAP+ACT results, with the only exception of the lensing amplitude.Comment: 5 pages, 6 figures, 2 table
Neutrino Anisotropies after Planck
We present new constraints on the rest-frame sound speed, c_{eff}^2, and the
viscosity parameter, c_{vis}^2, of the Cosmic Neutrino Background from the
recent measurements of the Cosmic Microwave Background anisotropies provided by
the Planck satellite. While broadly consistent with the expectations of
c_{eff}^2=c_{vis}^2=1/3 in the standard scenario, the Planck dataset hints at a
higher value of the viscosity parameter, with c_{vis}^2=0.60+/-0.18 at 68%
c.l., and a lower value of the sound speed, with c_{eff}^2=0.304+/-0.013 at 68%
c.l.. We find a correlation between the neutrino parameters and the lensing
amplitude of the temperature power spectrum A_L. When the latter parameter is
allowed to vary, we find a better consistency with the standard model with
c_{vis}^2=0.51+/-0.22, c_{eff}^2=0.311+/-0.019 and A_L=1.08+/-0.18 at 68% c.l..
This result indicates that the anomalous large value of A_L measured by Planck
could be connected to non-standard neutrino properties. Including additional
datasets from Baryon Acoustic Oscillation surveys and the Hubble Space
Telescope constraint on the Hubble constant, we obtain c_{vis}^2=0.40+/-0.19,
c_{eff}^2=0.319+/-0.019, and A_{L}=1.15+/-0.17 at 68% c.l.; including the
lensing power spectrum, we obtain c_{vis}^2=0.50+/-0.19,
c_{eff}^2=0.314+/-0.015, and A_L=1.025+/-0.076 at 68% c.l.. Finally, we
investigate further degeneracies between the clustering parameters and other
cosmological parameters.Comment: 10 pages, 8 captioned figures, 3 table
Foreword for a sixty-year-old triangle
Il contributo presenta la traduzione in inglese del testo, apparso in italiano nel 1954, in cui Gaetano Kanizsa pubblicava per la prima volta il triangolo illusorio
Okara: A nutritionally valuable by-product able to stabilize lactobacillus plantarum during freeze-drying, spray-drying, and storage
Okara is a nutritionally valuable by-product produced in large quantities as result of soymilk elaboration. This work proposes its use as both culture and dehydration medium during freeze-drying, spray-drying, and storage of Lactobacillus plantarum CIDCA 83114. Whole and defatted okara were employed as culture media for L. plantarum CIDCA 83114. The growth kinetics were followed by plate counting and compared with those of bacteria grown in MRS broth (control). No significant differences in plate counting were observed in the three media. The fatty acid composition of bacteria grown in whole and defatted okara showed a noticeable increase in the unsaturated/saturated (U/S) fatty acid ratio, with regard to bacteria grown in MRS. This change was mainly due to the increase in polyunsaturated fatty acids, namely C18:2. For dehydration assays, cultures in the stationary phase were neutralized and freeze-dried (with or without the addition of 250 mM sucrose) or spray-dried. Bacteria were plate counted immediately after freeze-drying or spray-drying and during storage at 4°C for 90 days. Freeze-drying in whole okara conducted to the highest bacterial recovery. Regarding storage, spray-dried bacteria previously grown in whole and defatted okara showed higher plate counts than those grown in MRS. On the contrary, freeze-dried bacteria previously grown in all the three culture media were those with the lowest plate counts. The addition of sucrose to the dehydration media improved their recovery. The higher recovery of microorganisms grown in okara after freeze-drying and spray-drying processes and during storage was ascribed to both the presence of fiber and proteins in the dehydration media, and the increase in U/S fatty acids ratio in bacterial membranes. The obtained results support for the first time the use of okara as an innovative matrix to deliver L. plantarum. Considering that okara is an agro-waste obtained in large quantities, these results represent an innovative strategy to add it value, providing a symbiotic ingredient with promising industrial applications in the development of novel functional foods and feeds.Fil: Quintana, Gabriel Sebastian. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaFil: Gerbino, Oscar Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaFil: Gomez Zavaglia, Andrea. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentin
Spotify vs. Apple Music
A quick look at the differences of the two biggest music streaming services, Spotify and Apple Music
Ovvio e condiviso?
L'articolo discute una tesi sostenuta da Emiliani e Mazzara nel loro articolo bersaglio: quella secondo cui l'approccio neuroscientifico alla dimensione sociale della mente concepisce l'ambiente soltanto come somma di stimoli elementari. Viene evidenziata la debolezza di tale tesi e di altre affermazioni contenute nell'articolo bersaglio, in particolare di quelle tendenti a contrapporre natura biologica e natura sociale
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