29 research outputs found
Search for dark photons produced in 13 TeV collisions
Searches are performed for both promptlike and long-lived dark photons,
A
0
, produced in proton-proton
collisions at a center-of-mass energy of 13 TeV, using
A
0
â
Ό
ĂŸ
Ό
â
decays and a data sample corresponding
to an integrated luminosity of
1
.
6
fb
â
1
collected with the LHCb detector. The promptlike
A
0
search covers
the mass range from near the dimuon threshold up to 70 GeV, while the long-lived
A
0
search is restricted to
the low-mass region
214
<m
Ă°
A
0
Ă
<
350
MeV. No evidence for a signal is found, and 90% confidence
level exclusion limits are placed on the
Îł
â
A
0
kinetic-mixing strength. The constraints placed on promptlike
dark photons are the most stringent to date for the mass range
10
.
6
<m
Ă°
A
0
Ă
<
70
GeV, and are
comparable to the best existing limits for
m
Ă°
A
0
Ă
<
0
.
5
GeV. The search for long-lived dark photons is the
first to achieve sensitivity using a displaced-vertex signature
Measurement of J/Ï -pair production in pp collisions at âs = 13 TeV and study of gluon transverse-momentum dependent PDFs
The production cross-section of J/Ï pairs in proton-proton collisions at a centre-of-mass energy of âs = 13 TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fbâ1 collected by the LHCb experiment. The measurement is performed with both J/Ï mesons in the transverse momentum range 0 < pT< 14 GeV/c and rapidity range 2.0 < y < 4.5. The cross-section of this process is measured to be 16.36 ± 0.28 (stat) ± 0.88 (syst) nb. The contributions from single-parton scattering and double-parton scattering are separated based on the dependence of the cross-section on the absolute rapidity difference ây between the two J/Ï mesons. The effective cross-section of double-parton scattering is measured to be Ïeff = 13.1 ± 1.8 (stat) ± 2.3 (syst) mb. The distribution of the azimuthal angle ÏCS of one of the J/Ï mesons in the Collins-Soper frame and the pT-spectrum of the J/Ï pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of âšcos 2ÏCSâ© and âšcos 4ÏCSâ© are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed
ContribuiçÔes da CIF para uma abordagem integral na atenção Ă SaĂșde de Crianças e Adolescentes
Patent application in biotechnology at subclass C12N in Brazil at the period of 2001 to 2005
An analysis of Instituto Nacional de Propriedade Industrial (INPI) patent database from 2001 to 2005 showed that less than 5% of the total patent deposited in the subclass C12N, which referred to "Microorganisms or Enzymes, Compositions thereof, Propagating, Preserving or Maintaining Microorganisms, Mutation or Genetic Engineering, Culture Media", were from national depositors. In contrast, more than 34% of all these deposits came from the United States of America during the same period. Among the national depositors, public universities and government research institutions contributed with 83% over all the deposits, demonstrating that research and development in the field of Biotechnology in Brazil has been concentrated within Brazilian public institutions during this period
STEM CELLS HEMATOPOIETIC NICHES AND INFLAMMATORY RESPONSE TO DIFFERENT SYNTHETIC PROSTHESIS IMPLANTED IN RAT WITH INCISIONAL HERNIAS
AnĂĄlise de parĂąmetros perceptivo-auditivos e acĂșsticos em indivĂduos gagos Analysis of acoustic and auditory-perceptual parameters in stutterers
OBJETIVO: Analisar parĂąmetros perceptivo-auditivos e acĂșsticos da voz em indivĂduos adultos gagos. MĂTODOS: Foram analisados 15 indivĂduos gagos do gĂȘnero masculino na faixa etĂĄria de 21 a 41 anos (mĂ©dia 26,6 anos), atendidos no Centro ClĂnico de Fonoaudiologia da instituição no perĂodo de fevereiro de 2005 a julho de 2007. Os parĂąmetros perceptivo-auditivos analisados envolveram a qualidade vocal, tipo de voz, ressonĂąncia, tensĂŁo vocal, velocidade de fala, coordenação pneumofĂŽnica, ataque vocal e gama tonal; quanto aos parĂąmetros acĂșsticos, foram analisadas a frequĂȘncia fundamental e sua variabilidade durante a fala espontĂąnea. RESULTADOS: A anĂĄlise perceptivo-auditiva mostrou que as caracterĂsticas mais frequentes nos indivĂduos gagos foram: qualidade vocal normal (60%), ressonĂąncia alterada (66%), tensĂŁo vocal (86%), ataque vocal alterado (73%), velocidade de fala normal (54%), gama tonal alterada (80%) e coordenação pneumofĂŽnica alterada (100%). No entanto, a anĂĄlise estatĂstica revelou que apenas a presença de tensĂŁo vocal, coordenação pneumofĂŽnica e a gama tonal alteradas apresentaram-se estatisticamente significativas nos indivĂduos gagos estudados. Na anĂĄlise acĂșstica, a frequĂȘncia fundamental variou de 125,54 a 149,59 Hz e a variabilidade da frequĂȘncia fundamental foi de 16 a 21 semitons ou 112,50 a 172,40 Hz. CONCLUSĂO: Os parĂąmetros perceptivo-auditivos analisados que tiveram frequĂȘncia significativa nos indivĂduos gagos estudados foram: presença de tensĂŁo vocal, alteração da gama tonal e na coordenação pneumofĂŽnica. Desta forma, Ă© importante avaliar os aspectos vocais nesses pacientes, pois a desordem da fluĂȘncia pode comprometer alguns parĂąmetros vocais podendo ocasionar disfonia.<br>PURPOSE: To analyze auditory-perceptual and acoustic parameters of the voices of adult stutterers. METHODS: Fifteen male stutterers in the age range from 21 to 41 years (mean 26.6 years), attended at the institution's Speech-Language Pathology Clinical Center in the period from February 2005 to July 2007, were analyzed. The auditory-perceptual parameters analyzed were vocal quality, type of voice, resonance, vocal tension, speech rate, pneumo-phonic coordination, vocal attack and pitch range; the acoustic parameters analyzed were fundamental frequency and its variability during spontaneous speech. RESULTS: The auditory-perceptual analysis showed that the most frequent characteristics among the subjects were normal vocal quality (60%), altered resonance (66%), vocal tension (86%), altered vocal attack (73%), normal speech rate (54%), altered pitch range (80%) and altered pneumo-phonic coordination (100%). However, only the presence of vocal tension and the altered pneumo-phonic coordination and pitch range were statistically significant in the stutterers studied. In the acoustic analysis, fundamental frequency varied from 125,54 to 149,59 Hz, and the variability of the fundamental frequency ranged from 16 to 21 halftones, or from 112,50 to 172,40 Hz. CONCLUSION: The auditory-perceptual parameters that were significantly frequent among stutterers were: presence of vocal tension, altered pneumo-phonic coordination, and altered pitch range. Therefore, it is important to evaluate the vocal aspects of these patients, for the fluency disorders might undermine some vocals parameters, causing dysphonia