78,202 research outputs found
Buenoa dilaticrus Barbosa, Nessimian
No full textBuenoa dilaticrus Barbosa, Nessimian, Ferreira- Keppler Fig. 13–17 Buenoa dilaticrus Barbosa, Nessimian, Ferreira-Keppler, 2010 a: 50 [Type localities: Brazil, State of Amazonas, Barcelos Municipality, Serra do Aracá, igarapé da Anta; Serra do Aracá, igarapé; State of Roraima, Alto Alegre, Serra de Surucucus, Rio Talemu-u baixo; Types in Instituto Nacional de Pesquisas da Amazônia (Brazil) and Coleção Entomológica Professor José alfredo Pinheiro Dutra – Universidade Federal do Rio de Janeiro (Brazil)]. Comments. Buenoa dilaticrus resembles B. tibialis Truxal, 1957 in general appearance, including the color pattern. According to Barbosa et al. (2010 a), in both species the head and thorax are yellow, posterior region of hemelytra and abdomen dark brown; rostral prong originating laterally on proximal region, shorter than the third rostral segment and with its apex rounded; the fore femur lacking a stridulatory area; internal margin of fore tibia apically projected; and the hind femur sinuous. Buenoa dilaticrus can be distinguished by its tylus being strongly inflated and rounded (Fig. 13); lateral expansion at the base of external margin of mid-tibia (Fig. 16); hind femur with a line of crests on internal margin, each one with a short seta at apex; and left clasper with hook well developed apically (fig. 17). Buenoa tibialis possesses a tylus slightly inflated (Fig. 50); mid-tibia enlarged at median region of external margin; hind femur sinuous with a line of short spines on inner surface; and left clasper with hook short and rounded apically (Fig. 52). The expanded mid-tibia of B. dilaticrus is very similar to that of B. oreia Nieser, Melo, Pelli, De Campos Barbosa, 1997, although the last species does not occur in the Amazon Region and is distinctly bigger, including its distinct rostral prong, among other features. Material. BRAZIL: Estado do Amazonas, Município de Barcelos, Serra do Aracá, igarapé da Anta, alt. 1116 m [00.90844ºN / 63.44009 ºW], 31.vii. 2009 (N. Ferreira Jr.): 1 m macropterous, holotype (INPA). Paratypes: idem holotype, 1m and 1 f macropteres (INPA), 1m and 1 f macropteres (DZRJ). Serra do Aracá, igarapé, alt. 1110 m [00.90612ºN / 63.45923 ºW], 01.viii. 2009 (N. Ferreira Jr.): 1 m macropterous (INPA). Estado de Roraima, Alto Alegre, Serra de Surucucus, Rio Talemu-u baixo, 01.xii. 1991 (V. Py-Daniel & U. C. Barbosa): 1 m macropterous (INPA).Published as part of Barbosa, Julianna Freires & Nessimian, Jorge Luiz, 2013, The genus Buenoa Kirkaldy, 1904 (Hemiptera: Heteroptera: Nepomorpha: Notonectidae) in northern Brazil: inventory, new records, and new species, pp. 101-130 in Zootaxa 3694 (2) on pages 106-107, DOI: 10.11646/zootaxa.3694.2.1, http://zenodo.org/record/22116
FIGURE 2. Diderma aglomerospora D.I. Barbosa & L.H. Cavalcanti. Sporangium shapes A,B,C in Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil
No full textFIGURE 2. Diderma aglomerospora D.I. Barbosa & L.H. Cavalcanti. Sporangium shapes A,B,C(Bar=1mm), Capillitium D(Bar=5μm), E(Bar=10μm), Spores F(Bar=3μm), G(Bar=4μm), H(Bar=10μm), I(Bar=5μm).Published as part of Barbosa, David Ítallo, Melo, Tiago Espósito O., Breyner, Fábio André & Cavalcanti, Laise De Holanda, 2021, Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil, pp. 231-236 in Phytotaxa 494 (2) on page 234, DOI: 10.11646/phytotaxa.494.2.6, http://zenodo.org/record/542341
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
[Postcard stating Henry B. Gonzalez's endorsement of John B. Connally for Governor, sent to Mrs. C. B. Bacarisse - 1962]
No full textPostcard with an endorsement by U.S. Congressman Henry B. Gonzalez of John B. Connally for Texas Governor. A photograph of Connally with John F. Kennedy accompanies the endorsement. John J. Herrera's address is stamped on the front and the back of the card, which is addressed to Mrs. C. B. Bacarisse
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Search for B-c(+) decays to two charm mesons
No full textA search for decays of B-c(+) mesons to two charm mesons is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb(-1), collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The decays considered are B-c(+)-> D-(s)(()*())(+) (D) over bar (()*()0) and Bc(+)-> D-(s)(()*D-)+(()*())(0), which are normalised to high-yield B+-> D-(s)(+)(D) over bar (0)decays. No evidence for a signal is found and limits are set on twelve B-c(+) decay modes. (C) 2018 The Author(s). Published by Elsevier B.V
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Measurement of the CKM angle gamma from a combination of B->Dh analyses
No full textA combination of three LHCb measurements of the CKM angle gamma is presented. The decays B->DK and B->Dpi are used, where D denotes an admixture of D0 and D0-bar mesons, decaying into K+K-, pi+pi-, K+-pi-+, K+-pi-+pi+-pi-+, KSpi+pi-, or KSK+K- final states. All measurements use a dataset corresponding to 1.0 fb-1 of integrated luminosity. Combining results from B->DK decays alone a best-fit value of gamma = 72.0 deg is found, and confidence intervals are set gamma in [56.4,86.7] deg at 68% CL, gamma in [42.6,99.6] deg at 95% CL. The best-fit value of gamma found from a combination of results from B->Dpi decays alone, is gamma = 18.9 deg, and the confidence intervals gamma in [7.4,99.2] deg or [167.9,176.4] deg at 68% CL, are set, without constraint at 95% CL. The combination of results from B->DK and B->Dpi decays gives a best-fit value of gamma = 72.6 deg and the confidence intervals gamma in [55.4,82.3] deg at 68% CL, gamma in [40.2,92.7] deg at 95% CL are set. All values are expressed modulo 180 deg, and are obtained taking into account the effect of D0-D0bar mixing
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