1,721,210 research outputs found
J/ψ production via fragmentation at the Tevatron.
No full textThe production of \jpsi at large transverse momenta (\pt > M_\jpsi) in collisions is considered by including the mechanism of fragmentation. Both contributions of fragmentation to \jpsi and of fragmentation to states followed by radiative decay to \jpsi are taken into account. The latter is found to be dominant and larger than direct production. The overall theoretical estimate is shown to be nearly consistent with the experimental observation
C. Diano, Opere, a cura di F. Diano, Con i contributi di M. Cacciari e S. Tagliagambe, Bompiani, Milano 2022, 2098 pp.
No full textRecensione del volume di C. Diano, Opere, a cura di F. Diano, Con i contributi di M. Cacciari e S. Tagliagambe, Bompiani, Milano 2022, pp. 2098
Analysis of the difference between some estimators of the two-parameter Weibull distribution
No full textThe goal of the statistical survey is to study a procedure for the calculation of the two parameters of the Weibull distribution, which is both accurate and robust. This proposed method is based on a “non-parametric” methodology that employs an extension of jackknife procedure applied to Jacquelin method. The robustness and accuracy of the proposed methodology are compared with the other techniques used in the literature such as Theil and Jacquelin procedure, LSR as well as MLE. It is also shown that this method provides accurate estimates, particularly for samples of data presenting outliers
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
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