Fulleropyrrolidine-functionalized ceria nanoparticles as a tethered dual nanosystem with improved antioxidant properties

Combining nanoceria and fulleropyrrolidine in a tethered nanosystem allows for efficient scavenging of reactive oxygen species and improved protection of mouse fibroblast cells exposed to a UV insult

Contrôle de la sous-stoechiométrie du site A, de la structure cristalline et de la microstructure de (La0.7Sr0.3)0.95(Co0.2Fe0.8)O3−δ pour une activité catalytique améliorée dans les piles à combustible.

International audienc

Fabrication of innovative calcium phosphate bioceramics using the electrostatic spray deposition technique

International audienc

(La0.7Sr0.3)0.95(Co0.2Fe0.8)O3−δ, nanostructurée et sous-stoechiométrique, pour une activité catalytique améliorée dans les piles à combustible.

International audienc

The profile of the human resources management at the knowledge organizations

The transition from the industrial society to the society of knowledge encouraged a diversity of changes in organizations. Some of these changes can be observed through the globalization of the businesses, the processes of reengineering and downsizing, and, more recently, the Benchmarking and the practical announce management. In this scenario, one of the areas of the organization that has stand out significantly is human resources. It happens due to the increasing appraisal of the people in the work environment, considered, currently, a greater and longer-lasting competitive resource than the technological competitiveness. Thus, the aim of this work is to map out the profile of the manager of human resources that is inserted in the current knowledge organizations, considering its interpersonal and technical abilities. The most significant fact about this work is that the growth of the area of human resources requires a distinguished professional profile to manage it. Therefore, the mapping of the professional abilities required by this position poses as a guide aiming the employment of the professionals in the area, allowing even to compare the reality identified with the theory studied. A survey in 21 large industries from Ponta Grossa and surrounding areas (Carambeí), in the state of Paraná, was carried out to achieve the goals of this work. They had been selected to be part of this study based on the idea that through the use they make of the knowledge of their collaborators and high technology, they are classified as knowledge organizations. Under these conditions, the result of this research allowed to map out the profile of the manager of human resources, as well as recognize the current performance of the human resources department in the companies. Thus, the results obtained in this research met its purpose and, in fact, validated that the human resources of the current organizations of knowledge went beyond the level of the simply operational performance. Now, it is acting in a strategical way inside of the companies, as described in the modern theory of business administration.A passagem da Sociedade Industrial para a Sociedade do Conhecimento promoveu diversas mudanças nas organizações. Algumas dessas mudanças podem ser percebidas através da globalização dos negócios, dos processos de Reengenharia e Downsizing vivenciados e mais recentemente, o Benchmarking e as práticas de gestão participativa. Neste cenário, uma das áreas da organização que mais tem se destacado é Recursos Humanos. Isto se deve à crescente valorização que vem sendo oferecida às pessoas no ambiente de trabalho, que estão sendo consideradas o maior e mais duradouro recurso competitivo do momento, em detrimento à competitividade tecnológica simplesmente. Dessa maneira, o objetivo desta dissertação de mestrado está em mapear o perfil do Gestor de Recursos Humanos que está inserido nas atuais Organizações do Conhecimento, considerando para isso suas competências técnicas e interpessoais. A relevância deste trabalho reside no fato de que o crescimento da área de Recursos Humanos requer um perfil profissional diferenciado para gerí-la. Assim, o mapeamento das competências profissionais deste cargo, apresenta-se como um direcionamento para a empregabilidade dos profissionais envolvidos nesta área, permitindo ainda que se compare a realidade identificada com a teoria estudada. Para consecução do objetivo proposto foi realizado um levantamento em vinte e uma (21) indústrias de grande porte, da cidade de Ponta Grossa e região (Carambéi) no Estado do Paraná. Estas organizações foram selecionadas para fazer parte deste estudo com base no pressuposto de que pelo uso que fazem do conhecimento de seus colaboradores e de alta tecnologia, passam a ser classificadas como Organizações do Conhecimento. Nestas condições, o resultado desta pesquisa propiciou o mapeamento do perfil do cargo de Gestor de Recursos Humanos da mesma forma que permitiu reconhecer o desempenho da área de Recursos Humanos nas empresas atualmente. Desse modo, o resultado desta pesquisa respondeu os objetivos a que se propôs, e confirmou que, de fato, a área de Recursos Humanos das atuais Organizações do Conhecimento ultrapassou o nível da atuação simplesmente operacional e está atuando de forma estratégica dentro das empresas, conforme descrito pela moderna teoria da Administração

Measurement of CP violation in the Bs0→ϕϕ {B}_s^0\to \phi \phi decay and search for the B0→ϕϕB^0\rightarrow \phi\phi decay

International audienceA measurement of the time-dependent CP-violating asymmetry in ${B}_s^0\to \phi \phi$ decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.0 fb^{−}^{1} collected by the LHCb experiment at centre-of-mass energies $\sqrt{s}$ = 7 TeV in 2011, 8 TeV in 2012 and 13 TeV in 2015 and 2016, a signal yield of around 9000 ${B}_s^0\to \phi \phi$ decays is obtained. The CP-violating phase ${\phi}_s^{s\overline{s}s}$ is measured to be −0.073 ± 0.115(stat) ± 0.027(syst) rad, under the assumption it is independent of the helicity of the ϕϕ decay. In addition, the CP-violating phases of the transverse polarisations under the assumption of CP conservation of the longitudinal phase are measured. The helicity-independent direct CP-violation parameter is also measured, and is found to be |λ| = 0.99 ± 0.05(stat) ± 0.01(syst). In addition, T-odd triple-product asymmetries are measured. The results obtained are consistent with the hypothesis of CP conservation in $\overline{b}\to \overline{s}s\overline{s}s$ transitions. Finally, a limit on the branching fraction of the B$^{0}$ → ϕϕ decay is determined to be $\mathcal{B}\left({B}^0\to \phi \phi \right)<2.7\times {10}^{-8}$ at 90 % confidence level

Observation of an excited Bc+B_c^+ state

International audienceUsing pp collision data corresponding to an integrated luminosity of 8.5  fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+)  MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc*(2S31)+ state reconstructed without the low-energy photon from the Bc*(1S31)+→Bc+γ decay following Bc*(2S31)+→Bc*(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+)  MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

Observation of Several Sources of CPCP Violation in B+→π+π+π−B^+ \to \pi^+ \pi^+ \pi^- Decays

International audienceObservations are reported of different sources of CP violation from an amplitude analysis of B+→π+π+π- decays, based on a data sample corresponding to an integrated luminosity of 3  fb-1 of pp collisions recorded with the LHCb detector. A large CP asymmetry is observed in the decay amplitude involving the tensor f2(1270) resonance, and in addition significant CP violation is found in the π+π-S wave at low invariant mass. The presence of CP violation related to interference between the π+π-S wave and the P wave B+→ρ(770)0π+ amplitude is also established; this causes large local asymmetries but cancels when integrated over the phase space of the decay. The results provide both qualitative and quantitative new insights into CP -violation effects in hadronic B decays

Measurement of CPCP-violating and mixing-induced observables in Bs0→ϕγB_s^0 \to \phi\gamma decays

International audienceA time-dependent analysis of the Bs0→ϕγ decay rate is performed to determine the CP -violating observables Sϕγ and Cϕγ and the mixing-induced observable AϕγΔ. The measurement is based on a sample of pp collision data recorded with the LHCb detector, corresponding to an integrated luminosity of 3  fb-1 at center-of-mass energies of 7 and 8 TeV. The measured values are Sϕγ=0.43±0.30±0.11, Cϕγ=0.11±0.29±0.11, and AϕγΔ=-0.67-0.41+0.37±0.17, where the first uncertainty is statistical and the second systematic. This is the first measurement of the observables S and C in radiative Bs0 decays. The results are consistent with the standard model predictions