497 research outputs found
PrincĂpios de Construção Enxuta em Empresa de Pequeno Porte em Guarulhos (SP)
O objetivo desta pesquisa Ă© verificar de que maneira os princĂpios da Construção Enxuta estĂŁo sendo empregados em empresa de pequeno porte do segmento de Construção Civil. A pesquisa Ă© de natureza qualitativa e exploratĂłria, sendo o estudo de caso realizado em uma construtora de pequeno porte de edifĂcios verticais com o apoio do Sindicato das Empresas de Compra, Venda, Locação e Administração de ImĂłveis Residenciais e Comerciais de SĂŁo Paulo - SECOVI. Observou-se grande interesse na implantação, sendo um ponto negativo a necessidade de mudança de cultura, visto que muitas atividades tidas como âvĂciosâ devem ser eliminadas, frente a novo conhecimento. Motivada pelos gestores e alta direção, a filosofia serĂĄ bem vinda, assim como outras ferramentas de Produção Enxuta, tais como o kanban, housekeeping, 5S, Just in Time e melhorias nos canteiros de obra e processos logĂsticos. Concluiu-se nesta pesquisa que os princĂpios da Construção Enxuta sĂŁo pouco conhecidos pelos profissionais, na prĂĄtica sendo voltados para gestĂŁo da qualidade e produtividade. Constatou-se que, ao mencionar os princĂpios, estes sĂŁo de pouco conhecimento, e tem-se uma aceitação imediata quando se fala em redução de tempo e aumento da produtividade com eliminação de tarefas consideradas como de nĂŁo agregação de valor
EFEITO DA TOXICIDADE AGUDA DA GASOLINA EM ALEVINOS DE ACARĂ BANDEIRA (Pterophyllum scalare)
Polycyclic and monocyclic hydrocarbons, constituents of petroleum compounds, stand out by its toxic action of fossil fuels for aquatic organisms. Thus, this study aimed to determine the lethal concentration (LC50) of gasoline to Pterophyllum scalare, evaluating the survival and behavior of fish changes. For this, P. scalare fingerlings (1.41 ± 0.1 cm and 0.039 ± 0.001 g) were used in a reference substance sensitivity test (KCl) and for the definitive test. The experiment was carried out in a completely randomized design with six dilutions of gasoline (0.05, 0.1, 0.15, 0.2, 0.25 and 0.3% v/v) and a control, all with three repetitions lasting 96 hours. To determine the values of CL(I)50 the Trimmed Spearman Karber method was used and classified according to the description proposed by Cesteb. The sensitivity determined for P. scalare fingerlings was (LC50-96h) 0.93 g.L-1, whereas the estimated 50% (LC50-96h) lethal concentration for gasoline was 0.14%, in which the dilution of 0, 3% had 100% mortality before 24 hours of exposure. Gasoline is classified as a very toxic xenobiotic, capable of changing the behavior of fingerlings, in which erratic swimming, agitation, proximity to the surface and rapid opercular beating were observed. Therefore, gasoline represents a risk to the aquatic environment resulting from the intoxication of organisms, causing behavioral changes and mortality.Keywords: Gasoline; ecotoxicity; angelfish; hydrocarbons.Os hidrocarbonetos policĂclicos e monocĂclicos, constituintes dos compostos derivados de petrĂłleo, sĂŁo as principais substĂąncias quĂmicas responsĂĄveis pela toxicidade dos combustĂveis fĂłsseis nos organismos aquĂĄticos. Desta forma, o presente estudo objetivou determinar a concentração letal (CL50) da gasolina em alevinos de acarĂĄ bandeira (Pterophyllum scalare), avaliando-se a sobrevivĂȘncia e as alteraçÔes comportamentais dos peixes. Para tanto, foram usados alevinos de P. scalare (1,41 ± 0,1 cm e 0,039 ± 0,001 g) em ensaio de sensibilidade com substĂąncia referĂȘncia (KCl) e para o teste definitivo. No qual, foi realizado um delineamento inteiramente casualizado com seis diluiçÔes de gasolina (0,05; 0,1; 0,15; 0,2; 0,25 e 0,3% v/v) e um controle, todos com trĂȘs repetiçÔes com duração de 96 horas. Para determinar os valores de CL(I)50 foi utilizado o mĂ©todo de Trimmed Spearman Karber e classificado segundo a descrição proposta por Cesteb. A sensibilidade determinada para os alevinos de P. scalare foi de (CL50-96h) 0,93 g.L-1, jĂĄ a concentração letal 50% (CL50-96h) estimada para a gasolina foi de 0,14%, ao qual a diluição de 0,3% teve mortalidade de 100% antes de 24 horas de exposição. A gasolina Ă© classificada como um xenobiĂłtico muito tĂłxico, capaz de alterar o comportamento dos alevinos, no qual foram observadas natação errĂĄtica, agitação, proximidade a superfĂcie e batimento opercular rĂĄpido. Portanto, a gasolina representa um risco ao ambiente aquĂĄtico decorrente da intoxicação dos organismos, causando alteraçÔes comportamentais e a mortalidade.Palavras-chave: Gasolina, ecotoxicidade, acarĂĄ bandeira, hidrocarbonetos
Hepatitis A and E seroprevalence and associated risk factors: a community-based cross-sectional survey in rural Amazonia
Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires
The production of tt⟠, W+bb⟠and W+cc⟠is studied in the forward region of protonâproton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fbâ1 . The W bosons are reconstructed in the decays WââÎœ , where â denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of , and is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 0.02 \mbox{fb}^{-1}. The bosons are reconstructed in the decays , where denotes muon or electron, while the and quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions
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
Study of the decay
The decay is studied
in proton-proton collisions at a center-of-mass energy of TeV
using data corresponding to an integrated luminosity of 5
collected by the LHCb experiment. In the system, the
state observed at the BaBar and Belle experiments is
resolved into two narrower states, and ,
whose masses and widths are measured to be where the first uncertainties are statistical and the second
systematic. The results are consistent with a previous LHCb measurement using a
prompt sample. Evidence of a new
state is found with a local significance of , whose mass and width
are measured to be and , respectively. In addition, evidence of a new decay mode
is found with a significance of
. The relative branching fraction of with respect to the
decay is measured to be , where the first
uncertainty is statistical, the second systematic and the third originates from
the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb
public pages
Measurement of the ratios of branching fractions and
The ratios of branching fractions
and are measured, assuming isospin symmetry, using a
sample of proton-proton collision data corresponding to 3.0 fb of
integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The
tau lepton is identified in the decay mode
. The measured values are
and
, where the first uncertainty is
statistical and the second is systematic. The correlation between these
measurements is . Results are consistent with the current average
of these quantities and are at a combined 1.9 standard deviations from the
predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb
public pages
BacHBerry: BACterial Hosts for production of Bioactive phenolics from bERRY fruits
BACterial Hosts for production of Bioactive phenolics from bERRY fruits (BacHBerry) was a 3-year project funded by the Seventh Framework Programme (FP7) of the European Union that ran between November 2013 and October 2016. The overall aim of the project was to establish a sustainable and economically-feasible strategy for the production of novel high-value phenolic compounds isolated from berry fruits using bacterial platforms. The project aimed at covering all stages of the discovery and pre-commercialization process, including berry collection, screening and characterization of their bioactive components, identification and functional characterization of the corresponding biosynthetic pathways, and construction of Gram-positive bacterial cell factories producing phenolic compounds. Further activities included optimization of polyphenol extraction methods from bacterial cultures, scale-up of production by fermentation up to pilot scale, as well as societal and economic analyses of the processes. This review article summarizes some of the key findings obtained throughout the duration of the project
Observation of the B0 â Ï0Ï0 decay from an amplitude analysis of B0 â (Ï+Ïâ)(Ï+Ïâ) decays
Protonâproton collision data recorded in 2011 and 2012 by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fbâ1 , are analysed to search for the charmless B0âÏ0Ï0 decay. More than 600 B0â(Ï+Ïâ)(Ï+Ïâ) signal decays are selected and used to perform an amplitude analysis, under the assumption of no CP violation in the decay, from which the B0âÏ0Ï0 decay is observed for the first time with 7.1 standard deviations significance. The fraction of B0âÏ0Ï0 decays yielding a longitudinally polarised final state is measured to be fL=0.745â0.058+0.048(stat)±0.034(syst) . The B0âÏ0Ï0 branching fraction, using the B0âÏKâ(892)0 decay as reference, is also reported as B(B0âÏ0Ï0)=(0.94±0.17(stat)±0.09(syst)±0.06(BF))Ă10â6
Study of the rare B-s(0) and B-0 decays into the pi(+) pi(-) mu(+) mu(-) final state
A search for the rare decays and is performed in a data set corresponding to an integrated luminosity of 3.0 fb collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/ and with muon pairs that do not originate from a resonance are considered. The first observation of the decay and the first evidence of the decay are obtained and the branching fractions are measured to be and , where the third uncertainty is due to the branching fraction of the decay , used as a normalisation.A search for the rare decays Bs0âÏ+ÏâÎŒ+ÎŒâ and B0âÏ+ÏâÎŒ+ÎŒâ is performed in a data set corresponding to an integrated luminosity of 3.0 fbâ1 collected by the LHCb detector in protonâproton collisions at centre-of-mass energies of 7 and 8 TeV . Decay candidates with pion pairs that have invariant mass in the range 0.5â1.3 GeV/c2 and with muon pairs that do not originate from a resonance are considered. The first observation of the decay Bs0âÏ+ÏâÎŒ+ÎŒâ and the first evidence of the decay B0âÏ+ÏâÎŒ+ÎŒâ are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(Bs0âÏ+ÏâÎŒ+ÎŒâ)=(8.6±1.5 (stat)±0.7 (syst)±0.7(norm))Ă10â8 and B(B0âÏ+ÏâÎŒ+ÎŒâ)=(2.11±0.51(stat)±0.15(syst)±0.16(norm))Ă10â8 , where the third uncertainty is due to the branching fraction of the decay B0âJ/Ï(âÎŒ+ÎŒâ)Kâ(892)0(âK+Ïâ) , used as a normalisation.A search for the rare decays Bs0âÏ+ÏâÎŒ+ÎŒâ and B0âÏ+ÏâÎŒ+ÎŒâ is performed in a data set corresponding to an integrated luminosity of 3.0 fbâ1 collected by the LHCb detector in protonâproton collisions at centre-of-mass energies of 7 and 8 TeV . Decay candidates with pion pairs that have invariant mass in the range 0.5â1.3 GeV/c2 and with muon pairs that do not originate from a resonance are considered. The first observation of the decay Bs0âÏ+ÏâÎŒ+ÎŒâ and the first evidence of the decay B0âÏ+ÏâÎŒ+ÎŒâ are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(Bs0âÏ+ÏâÎŒ+ÎŒâ)=(8.6±1.5 (stat)±0.7 (syst)±0.7(norm))Ă10â8 and B(B0âÏ+ÏâÎŒ+ÎŒâ)=(2.11±0.51(stat)±0.15(syst)±0.16(norm))Ă10â8 , where the third uncertainty is due to the branching fraction of the decay B0âJ/Ï(âÎŒ+ÎŒâ)Kâ(892)0(âK+Ïâ) , used as a normalisation.A search for the rare decays and is performed in a data set corresponding to an integrated luminosity of 3.0 fb collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/ and with muon pairs that do not originate from a resonance are considered. The first observation of the decay and the first evidence of the decay are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be and , where the third uncertainty is due to the branching fraction of the decay , used as a normalisation
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