77,889 research outputs found
Letter from Arno B. Cammerer to J. R. Eakin
No full textLetter from Arno B. Cammerer to J. R. Eakin describing the procedure for purchasing Bright Angel Trail
From DQBF to QBF by dependency elimination
No full textIn this paper, we propose the elimination of dependencies to convert a given dependency quantified Boolean formula (DQBF) to an equisatisfiable QBF. We show how to select a set of dependencies to eliminate such that we arrive at a smallest equisatisfiable QBF in terms of existential variables that is achievable using dependency elimination. This approach is improved by taking so-called don’t-care dependencies into account, which result from the application of dependency schemes to the formula and can be added to or removed from the formula at no cost. We have implemented this new method in the state-of-the-art DQBF solver HQS. Experiments show that dependency elimination is clearly superior to the previous method using variable elimination
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
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
Amaurosoma articulatum BECKER 1894
No full text<i>Amaurosoma articulatum</i> BECKER, 1894 <p> M a t e r i a l e x a m i n e d: <b>Czech Republic:</b> Suchdol u Kunštátu (6857), 3.v.2007, 1♀, Máca leg. (MMSC). <b>Poland:</b> Bialiwieza, 26.v.1957, 1♀, Kaszab leg. (NNHM).</p>Published as part of <i>Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2)</i> on page 1646, DOI: <a href="http://zenodo.org/record/5277519">10.5281/zenodo.5277519</a>
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
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
B&G rapport 880
No full textBecker & Van de Graaf bv, nu IDDS Archeologie, heeft in februari en maart 2010 een archeologisch bureauonderzoek en een inventariserend archeologisch onderzoek (IVO) door middel van boringen uitgevoerd in het kader van het opstellen van een bestemmingsplan voor het eerste tracédeel van de Ridderkerklijn te Ridderkerk. Uit het onderzoek is gebleken dat op het tracé twee archeologische elementen zich in de ondergrond bevinden
Amaurosoma puberulum BECKER 1894
No full text<i>Amaurosoma puberulum</i> BECKER, 1894 <p> M a t e r i a l e x a m i n e d: <b>Czech Republic:</b> Kynšperk nad Ohří (5841), 20.vi.2001, 1♂, Šifner leg. (FSPC).</p>Published as part of <i>Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2)</i> on page 1646, DOI: <a href="http://zenodo.org/record/5277519">10.5281/zenodo.5277519</a>
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