87,878 research outputs found
Os Super amigos dos idiomas - o universo dos heróis no ensino do Inglês
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Search for the decay Bs0→D*∓π±
No full textA search for the decay Bs0→D*∓π± is presented using a data sample corresponding to an integrated luminosity of 1.0 fb-1 of pp collisions collected by LHCb. This decay is expected to be mediated by a W-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help us to understand the mechanism behind related decays such as Bs0→π+π- and Bs0→DD̅ . Systematic uncertainties are minimized by using B0→D*∓π± as a normalization channel. We find no evidence for a signal, and set an upper limit on the branching fraction of B(Bs0→D*∓π±)<6.1(7.8)×10-6 at 90% (95%) confidence level
JET machine operations in T&D-T
No full textJET, the world's largest operating tokamak with unique Be/W wall and tritium handling capability, completed a Deuterium-Tritium (D-T) campaign in 2021 (Maggi et al 29th Fusion Energy Conf.) following a decade of preparatory experiments, dedicated enhancements, technical rehearsals and training (Horton et al 2016 Fusion Eng. Des. 109-111 925). Operation with tritium raises significant technical, safety and scientific challenges not encountered in standard protium or deuterium operation. This contribution describes the tritium operational requirements, pulses and technical preparations, new operating procedures, lessons learned and details on the achieved operational availability and performance. The preparation and execution of the recent JET tritium experiments benefitted from the previous experience in 1991 (Preliminary Tritium Experiment), 1997 (DTE1 campaign) and 2003 (Trace Tritium Campaigns) and consisted of the following five phases: technical rehearsals and scenario preparation, tritium commissioning, 100% tritium campaign, D-T campaign (DTE2), tritium clean-up. Following the clean-up JET resumed normal operation and is currently undertaking a further D-T campaign (DTE3)
Mapa semidetalhado dos solos da área do Campo Experimental do CPAF- Acre.
No full textColaborador: Sabrina Forte e Silva. Parte de: RODRIGUES, T. E.; SILVA, J. M. L. da; CORDEIRO, D. G.; GOMES, T. C. de A.; CARDOSO JÚNIOR, E. Q. Caracterização e classificação dos solos do Campo Experimental da Embrapa Acre, Rio Branco, Estado do Acre. Belém, PA: Embrapa Amazônia Oriental, 2001. 43 p. (Embrapa Amazônia Oriental. Documentos, 122)
Overview of T and D-T results in JET with ITER-like wall
No full textIn 2021 JET exploited its unique capabilities to operate with T and D–T fuel with an ITER-like Be/W wall (JET-ILW). This second major JET D–T campaign (DTE2), after DTE1 in 1997, represented the culmination of a series of JET enhancements—new fusion diagnostics, new T injection capabilities, refurbishment of the T plant, increased auxiliary heating, in-vessel calibration of 14 MeV neutron yield monitors—as well as significant advances in plasma theory and modelling in the fusion community. DTE2 was complemented by a sequence of isotope physics campaigns encompassing operation in pure tritium at high T-NBI power. Carefully conducted for safe operation with tritium, the new T and D–T experiments used 1 kg of T (vs 100 g in DTE1), yielding the most fusion reactor relevant D–T plasmas to date and expanding our understanding of isotopes and D–T mixture physics. Furthermore, since the JET T and DTE2 campaigns occurred almost 25 years after the last major D–T tokamak experiment, it was also a strategic goal of the European fusion programme to refresh operational experience of a nuclear tokamak to prepare staff for ITER operation. The key physics results of the JET T and DTE2 experiments, carried out within the EUROfusion JET1 work package, are reported in this paper. Progress in the technological exploitation of JET D–T operations, development and validation of nuclear codes, neutronic tools and techniques for ITER operations carried out by EUROfusion (started within the Horizon 2020 Framework Programme and continuing under the Horizon Europe FP) are reported in (Litaudon et al Nucl. Fusion accepted), while JET experience on T and D–T operations is presented in (King et al Nucl. Fusion submitted)
Vitamin D receptor (VDR) polymorphisms are associated to spontaneous preterm birth and maternal aspects
No full textPreterm birth (PTB) is featured by less than 37 weeks of gestational age or fewer than 259 days since the first day from the last menstrual period. Complications of PTB are the major cause of neonatal deaths, several factors are linked to PTB increased risk including immunological and genetics. Vitamin D plays an important role in immune response modulation and its action occurs through the vitamin D receptor (VDR), which recently has been described as overexpressed in human placenta during the pregnancy. Herein we assessed two single nucleotide polymorphisms (SNPs) FokI (rs2228570 A>G) and Cdx-2 (rs11568820 T>C), within VDR, using TaqMan fluorogenic probes,
and differential susceptibility to SPTB. We assessed 104 pregnant women with SPTB and 85 women with normal birth in a Northeastern Brazilian population. Statistically significant differences for both SNPs where found when comparing allele and genotype frequencies in both groups: the T allele for rs2228570 and A allele for rs11568820 were significantly more frequent in SPTB group than in normal birth group (p=0.000013 and p=0.00466, respectively). The rs11568820 A/A genotype was associated to clinical/demographic variables such as: premature birth (p=0.007), neonate weight (p=0.039), presence of infection during pregnancy (p=0.011) and premature birth
among multiparous (p=0.015). The rs2228570 T/T genotype associated with gestational diabetes mellitus (p=0.044) and chorioamnionitis during pregnancy (p=0.043). In conclusion our findings indicate an association between polymorphisms FokI and Cdx-2 within VDR gene and SPTB, suggesting their involvement in the triggering of these syndrome
Measurement of the B0–B0 oscillation frequency Δmd with the decays B0→D−π+ and B0→ J/ψK∗0
No full textThe B
0
–B
0
oscillation frequency Δmd is measured by the LHCb experiment using a dataset corresponding
to an integrated luminosity of 1.0 fb−1
of proton–proton collisions at √
s = 7 TeV, and is found to be
Δmd
=0.5156±0.0051 (stat.)±0.0033 (syst.) ps−1
. The measurement is based on results from analyses
of the decays B
0
→ D
−π
+ (D
−
→ K
+π
−π
−) and B
0
→ J/ψK
∗0
(J/ψ →μ
+μ
−,K
∗0
→ K
+π
−) and
their charge conjugated modes
Releitura da teoria e do receituário de economia Política de José da Silva Lisboa - Visconde de Cairu
No full textTCC (graduação) - Universidade Federal de Santa Catarina. Centro Sócio-Econômico. Economia.José da Silva Lisboa – Visconde de Cairu – economista do século XIX, insere-se na história do pensamento econômico brasileiro quando figura no episódio da Abertura dos Portos em 1808. A partir daí, evidenciam-se sua publicação de princípios liberais de economia política e a sua atuação política no Brasil colônia-nação. Pouco conhecido na atualidade, tem sua mais importante referência na obra de Celso Furtado, Formação Econômica do Brasil, sendo veementemente criticado como cego divulgador de Adam Smith e repetidor do laissez-faire, impedindo o desenvolvimento industrial do país. Esta monografia tem o intuito de conhecer a posição de Cairu sobre o desenvolvimento econômico do país, e avaliar a visão perpetuada por Furtado. Para isso, será levantada uma cuidadosa apresentação do cenário em que atuou e escreveu este autor, e apontadas as idéias nucleares de suas obras Princípios de Economia Política e Observações Sobre a Franqueza da Indústria e Estabelecimento de Fábricas no Brasil
Vitamin D receptor (VDR) gene polymorphisms and susceptibility to systemic lupus erythematosus clinical manifestations
No full textSystemic lupus erythematosus (SLE) is an autoimmune disorder with heterogeneous clinical manifestations and target tissue damage. Currently, several genes have been associated with SLE susceptibility, including vitamin D receptor (VDR), which is a mediator of immune responses through the action of vitamin D. Polymorphisms in the VDR gene can impair the vitamin D (D3) function role, and since SLE patients show deficient D3 blood levels, it leads to a possible connection to the disease's onset. In our study we searched for an association between VDR polymorphisms and risk of developing SLE, as well as the disease's clinical manifestations. We enrolled 158 SLE patients and 190 Southeast Brazilian healthy controls, genotyped for five Tag single nucleotide polymorphisms (SNPs), covering most of the VDR gene region. We found an association between VDR SNPs and SLE for the following clinical manifestations: rs11168268 and cutaneous alterations (p=0.036), rs3890733 (p=0.003) rs3890733 and arthritis (p=0.001), rs2248098 and immunological alterations (p=0.040), rs4760648 and antibody anti-dsDNA (p=0.036). No association was reported between VDR polymorphisms and SLE susceptibility
Novantinoe iani Santos-Silva & Hovore 2007
No full text<p> <b> <i>Novantinoe iani</i> Santos-Silva & Hovore, 2007 (Fig. 20 G-I)</b> </p> <p> <i>Novantinoe iani</i> Santos-Silva & Hovore, 2007a: 601, figs. 32, 48; Santos-Silva & Martins, 2010: 200, fig. 276; Le Tirant & Santos-Silva, 2014b; 2; Monné <i>et al.,</i> 2017 a: 86; Botero & Almeida, 2019: 56; Botero & Gutiérrez, 2020: 8; Monné, 2023: 253.</p> <p> <b>Holotype:</b> ♂ " HOLOTYPE // PERU MADRE de DIOS / Rio Alto Madre de Dios / Pantiacolla Lodge 410-700 m / 12°39.4′S, 71°13.9′W / D. Brzoska 25-X-2000 // keys to / equatoriensis // <i>Novantinoe</i> / <i>iani</i> / Santos-Silva / & Hovore // MZSP 40830 ″.</p> <p> <b>Paratypes (3):</b> ♀ " PARÁTIPO // ECUADOR, Napo Pr. 2 km / N Ahuano, malaise trap / 05-15 Sept 2000 / F. T. Hovore, coll. // n. sp. keys to / equatoriensis // <i>Novantinoe</i> / <i>iani</i> / Santos-Silva / & Hovore // MZSP 40832″. ♀ " PARÁTIPO // ECUADOR, Napo Pr. / 25 km E. Atahualpa / 10-15 Sept 1998 / F. T. Hovore, coll. // <i>Novantinoe</i> / <i>iani</i> / Santos-Silva / & Hovore // MZSP 40833″. ♀ " PARÁTIPO // ECUADOR, Napo Pr. / Jatun Sacha Reserve,/ 04-06 Sept 2000 / F. T.Hovore,coll.// <i>Novantinoe</i> / <i>iani</i> / Santos-Silva / & Hovore // MZSP 40831″.</p>Published as part of <i>Botero, Juan Pablo, Casari, Sônia A. & Santos-Silva, Antonio, 2024, An illustrated catalog of Disteniidae (Coleoptera: Chrysomeloidea) type specimens deposited at the Museu de Zoologia da Universidade de São Paulo, pp. 1-38 in Papéis Avulsos de Zoologia 64</i> on pages 29-32, DOI: 10.11606/1807-0205/2024.64.012, <a href="http://zenodo.org/record/10942964">http://zenodo.org/record/10942964</a>
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