34,591 research outputs found
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
Search for direct CP violation in D0→h−h+ modes using semileptonic B decays
No full textA search for direct CP violation in D0 → h-h+ (where h = K or π) is presented using data corresponding to an integrated luminosity of 1.0 fb-1 collected in 2011 by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The analysis uses D0 mesons produced in inclusive semileptonic b-hadron decays to the D0μX final state, where the charge of the accompanying muon is used to tag the flavour of the D0 meson. The difference in the CP-violating asymmetries between the two decay channels is measured to be ΔACP = ACP(K-K+) - ACP(π-π+) = (0.49± 0.30 (stat) ± 0.14 (syst))%
Miscellaneous correspondence from the H. B. Clawson papers, 1872-1895
No full textMiscellaneous Correspondence from the H. B. Clawson papers, 1872-1895: (1) Letter dated 24 December 1872 at Salt Lake City, Utah, by Robert Williams to Hiram B. Clawson, thanking him for gifts (1 page); (2) Letter dated 6 May 1878 at Liverpool, England, by Charles Nibley to Bradley Clawson (1 page); (3) Letter dated 21 December 1886? at Chicago, Illinois, by B. R. Wells of M.D. Wells & Company to Hiram B. Clawson, regretting missing him when he was in town (1 page); (4) Letter dated 2 March 1881 at Middlefield [State unknown] by Matthew Smith to "Mrs. Clawson" (Ellen S. Clawson, Hiram\u27s first wife) (2 pages); (5) Letter dated 29 January 1884 at South Bend, Indiana, by Mrs. G. Foote (probably mother of James Foote, who married Ellen\u27s daughter Georgia) to Mrs. [Ellen S.] Clawson, prior to the expected visit of Ivie Clawson (2 pages); (6) Letter dated 21 April 1881 at New York City by Titus B. Eldridge to H. B. Clawson, upon receiving a gift of the Book of Mormon (2 pages); (7) Letter dated 18 August 1891 at Hayden, Idaho, by "Ed" to Ivie Clawson at Soda Springs, Idaho, describing his travels from Salt Lake City through Idaho; (8) Letter dated 26 April 1892 at East Mill Creek by Nellie Fisher to Ellen Clawson, with questions about the history of "Primary" (2 pages); (9) Letter dated 29 March 1894 at San Francisco, California, by Florence [no surname given], to her cousin Ivie Clawson at Salt Lake City, Utah (4 pages); (10) Letter dated 23 August 1894 at Paris, Idaho, by Lilian Spencer to her cousin Ivie Clawson at Salt Lake City (3 pages); (11) Letter dated 1 January 1895 at Boston, Massachusetts, by Jean C. Thatcher to Ivie Clawson Greene, congratulating her on her marriage (pages); (12) Letter dated 13 April 1895 by Henry F. CLark, Manager of the Literary Bureau, Curtis Publishing Company, at Philadelphia, Pennsylvania, to E. C. Clawson, providing information on author Edward Bellamy; (13) Letter dated 6 April [no year] by John T. White to Ivie and Winnie Clawson; (14) Letter [undated] by Mary DeVol (?) at Council Bluffs to Mrs. [Ellen S.] Clawso
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
A Trimetallic Cu(II) Derivative as an Efficient and Stable Electrocatalyst for Reduction of Proton to Molecular Hydrogen
No full textA trinuclear copper(II) complex, namely [Cu3(L)2(CF3COO)2] (1) is afforded integrating a ‘compartmental’ Schiff base, H2L [where H2L = N,N′-bis(salicylidene)-1,3-propanediamine] and fully characterized. Complex 1 is implemented for electrocatalytic proton reduction to originate molecular hydrogen in a homogenous system. The electrochemical study involving CV (cyclic voltammetry), CPE (controlled potential electrolysis) and GC (gas chromatography) reveals that in homogeneous system, 1 is highly active towards proton reduction in presence of trifluoro acetic acid as a proton source. Following CPE at − 1.8 V vs Ag/AgCl, the headspace gas is sampled and gas chromatography is carried out to quantify the amount of hydrogen discharged. The ratio of theoretical H2 production from charge aggregation during electrolysis to the practical amount of H2 resolved on GC is yielded a Faradaic efficiency value of 87%. Moreover, an extended bulk electrolysis experiment carried out for 35 h illustrates the presence of a stable catalytic system in which 230 C of charge is accumulated. As a consequence, this efficient and stable H2 evolution obtained using a Cu(II) derivative (CuII is cheap and earth abundant) has shown that the synthesis of judiciously designed copper complex is a promising strategy towards potential catalysts from proton reduction. Graphic Abstract: [Figure not available: see fulltext.]Electrochemical and catalytic study of a trimetallic Cu(II) derivative in DMSO with the presence of trifluoroacetic acid as weak proton source shows the hydrogen evolution Faradaic efficiency as 87%. A continuous increment of the charge accumulation through time is observed, indicating the high stability of our catalyst under electrochemical H2 generation
Fully Turbulent Mean Velocity Profile for Purely Viscous non-Newtonian Fluids
No full textThe characteristic near wall behavior of turbulent flow of purely-viscous non-Newtonian fluids is discussed for both power-law (P.-L.) and Herschel-Bulkley (H.-B.) rheological models. A proper scaling is presented for H.-B. fluids to establish an analogy with power-law fluids with same flow index. To provide reference data for turbulent flow of non-Newtonian fluids, DNS simulations of power-law fluids are conducted in a rectangular channel for a large range of power-law indices ( = 0.5, 0.69, 0.75, 0.9, 1, 1.2). The DNS data show that the mean velocity profile in the viscous and logarithmic layers follow expressions of the form and respectively, where shows a logarithmic dependency on the flow index.Comparison with some experimental data shows the above formulation to be valid for Reynolds numbers (based on shear velocity) as high as 1000
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
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
EPR, DFT and electrochemical interpretation of a Cu(II) derivative incorporating a Schiff base precursor
No full textThe mononuclear Cu II derivative, [Cu(L)(H 2 O) 2 ] (1) [where H 2 L = N,N′-bis(3-methoxysalicylidenimino)-1,3-diaminopropane] is afforded and systematically characterized. In 1, the central Cu II atom is linked to the NNOO donor atoms of the di-compartmental Schiff base precursor and additionally coordinated with two water molecules; thus achieves a distorted octahedral geometry. The EPR spectrum is simulated with WinEPR software having g || = 2.210 and g ⊥ = 2.041. We also conduct the DFT computational study which fits well with experimental affirmation. The room temperature magnetic susceptibility of complex 1 confirms the effective magnetic moment (μ eff ) value as 1.99 B.M. The electrochemical measurement using cyclic voltammetry showed redox potentials at +0.63, −1.25, and −1.82 V versus Ag/AgCl, which are due to reversible and rapid Cu(III/II), Cu(II/I) and Cu(I/0) process
Search for the Higgs boson decays H -> ee and H -> e mu in pp collisions at root s=13 TeV with the ATLAS detector
No full textSearches for the Higgs boson decays H -> ee and H -> e mu are performed using data corresponding to an integrated luminosity of 139 fb(-1) collected with the ATLAS detector in pp collisions at root s = 13 TeV at the LHC. No significant signals are observed, in agreement with the Standard Model expectation. For a Higgs boson mass of 125 GeV, the observed (expected) upper limit at the 95% confidence level on the branching fraction B(H -> ee) is 3.6 x 10(-4) (3.5 x 10(-4)) and on B(H -> e mu) is 6.2 x 10(-5) (5.9 x 10(-5)). These results represent improvements by factors of about five and six on the previous best limits on B(H -> ee) and B(H -> e mu) respectively. (C) 2019 The Author. Published by Elsevier B.V
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