Search CORE

1,721,535 research outputs found

Author Instructions

Author: Instructions Author
Publication venue
Publication date: 04/11/2013
Field of study

Crossref

Cartographic Perspectives (E-Journal - North American Cartographic Information Society, NACIS)

Going Beyond Counting First Authors in Author Co-citation Analysis

Author: Zhao Dangzhi
Publication venue
Publication date: 01/01/2005
Field of study

The 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

E-LIS

Variations on the Author

Author: Sayad Cecilia
Publication venue
Publication date: 01/01/2016
Field of study

“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

Crossref

Kent Academic Repository

Appropriate Similarity Measures for Author Cocitation Analysis

Author: Waltman L.R.
Eck N.J.P. van
Publication venue
Publication date
Field of study

We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authorsâ€™ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis

Research Papers in Economics

Dispelling the Myths Behind First-author Citation Counts

Author: Zhao Dangzhi
Publication venue
Publication date: 01/01/2006
Field of study

We 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

E-LIS

Author Index

Author: Author Index
Publication venue
Publication date
Field of study

Nao informado

XXX Cracow EPIPHANY Conference on Precision Physics at High Energy Colliders

Author: Chernov Aleksei
Publication venue
Publication date: 01/01/2024
Field of study

CERN Document Server

Proceedings of the talk Study of CP violation in charm meson decays for XXX Epiphany conference

Author: Chernov Aleksei
Publication venue
Publication date: 08/07/2024
Field of study

Basic idea of

CP

violation and its importance for cosmology, Standard Model and possible New Physics are introduced. Recent (2019) discovery of CP violation in charm in the

ΔA_{CP}

between

D^0\rightarrow K^-K^+

and

D^0\rightarrow π^+π^-

decay channels and evidence for direct CP violation in

D^0\rightarrow π^-π^+

decays in 2023 is discussed. Motivation and brief outline for search of CP violation in the

D^0\rightarrow Vγ

, where

V=ϕ,ρ^0, \bar{K}^{*0}

decays is given.Submitted to Acta Physica Polonica B. Accepted for publication on 7th of May, 202

arXiv.org e-Print Archive

koamabayili/VECTRON-author-checklist: VECTRON author checklist

Author: koamabayili
Publication venue
Publication date: 19/04/2022
Field of study

We have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used

ZENODO

Measurement of $CP$ asymmetry in radiative charm decays at LHCb

Author: Chernov Aleksei
Publication venue
Publication date: 01/01/2024
Field of study

This thesis presents a measurement of

CP

asymmetry,

A_{CP}

, for radiative decays of charm mesons

D^0 \to V \gamma

, and their charge conjugates, where

V

denotes vector meson

\bar{K}^{*0}

\phi

\rho^0

. The study is based on the proton-proton collision data collected at a centre-of-mass energy of

\sqrt{s} = 8

~TeV by the LHCb experiment in 2012, during Run-1 of the LHC. This data sample corresponds to an integrated luminosity of 2 fb

^{-1}

. Reconstructed neutral

D

mesons originate from strong decays of the

D^{*\pm}

states,

D^{*+}\to D^0 \pi^+_s

and

D^{*-}\to \bar{D}^0 \pi^-_s

, with the soft-pion

\pi_s

charge used for tagging of a

D

flavour at the production. The presented analysis is the first study of radiative charm decays at LHCb. \\ Large and irreducible background from decays involving

\pi^0

mesons,

D^0\to V \pi^0

, is suppressed using a multivariate classifier based on distinguished shapes of energy clusters produced by photons and

\pi^0

mesons in the LHCb calorimeter system. The signal decays are separated from residual background with the three-dimensional fit to

D^0

invariant mass

M(D^0)

, the difference between invariant masses of

D^{*+}

and

D^0

\Delta M = M(D^{*+})-M(D^0)

, and

V

-meson helicity angle

\cos{\theta}

, as observables. Correlations observed between

M(D^0)

and

\Delta M

observables for both signal and background channels, are modelled based on the corresponding simulation samples. The total

D^0

and

\bar{D}^0

signal yields are measured to be:

4263 \pm 193

events for

D^0\to \bar{K}^{*0}\gamma

decay, and

216 \pm 29

events for the

D^0\to \phi\gamma

decay; no significant signal is observed for the

D^0\to \rho\gamma

decay. \\ Nuisance asymmetries due to asymmetric charm production and asymmetric detection of positively and negatively charged hadrons, are constrained with high-statistics and high-purity reference channels. The pion-tagged

D^0 \to K^+K^-

and

D^0 \to \pi^+\pi^-

decays are chosen as reference channels for

D^0 \to \phi \gamma

and

D^0 \to \rho^0 \gamma

signal decays, respectively, whereas

D^0 \to K^- \pi^+ \pi^0

is used as a reference channel for

D^0 \to \bar{K}^{*0} \gamma

. The nuisance asymmetries are measured to be about

(-1.0 \pm 0.2)\%

D^0 \to K^+K^-

and

D^0 \to \pi^+\pi^-

channels, and

(-1.7 \pm 0.3)\%

D^0 \to K^- \pi^+ \pi^0

. They are subtracted from asymmetries measured for the signal channels in order to access

A_{CP}

. \\ The asymmetries for the signal channels are measured by performing the three-dimensional fits in

M(D^0)

vs.

\Delta M

vs.

\cos{\theta}

space, simultaneously to the separated

D^0

and

\bar{D}^0

samples. The central values of the asymmetries are still blinded, while their statistical uncertainties are measured to be 5\% for

D^0 \to \bar{K}^{*0} \gamma

and 12\% for

D^0 \to \phi \gamma

; the Run-1 analysis is not sensitive to the asymmetry in the

D^0 \to \rho^0 \gamma

decay. The presented measurement is statistically limited. The total systematic uncertainties on the signal

A_{CP}

's are expected to be below 1\%, and dominated by statistical uncertainties on the asymmetries measured in the reference channels. Unblinding is planned together with the Run-2 measurement, which is currently ongoing

CERN Document Server