1,723,700 research outputs found
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
Variations on the Author
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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 authors’ 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
On div-curl for higher order
No full textLet d be an exterior derivative operator acting on differential forms on R
n, defined by
d: Λq(R
n
) 7→ Λq+1(R
n
), 0 ≤ q ≤ n.
In [Math. Res. Lett. 12 (2005), no. 1, 57–61; MR2122730], E. M. Stein and the first
author of the paper under review established the inequality
(LS) kukLn/(n−1)(Rn) ≤ C
kdukL1(Rn) + kd
∗ukL1(Rn)
,
which holds for any form u of degree q other than q = 1 (unless d
∗u = 0) and q = n − 1
(unless du = 0). Inequality (LS) connects the celebrated Gagliardo-Nirenberg inequality
kfkLn/(n−1)(Rn) ≤ Ck∇fkL1(Rn)
and the Bourgain-Brezis inequality
kZkLn/(n−1)(Rn) ≤ CkCurlZkL1(Rn)
for divergence-free vector fields.
In the present work, the authors prove an appropriate analogue of inequality (LS) for
a new class of differential operators of higher orders.
{For the collection containing this paper see MR3309083
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
PRQ_Replication_File_10.25.19 for Choosing the Less Convenient Way to Vote: An Anomaly in Vote by Mail Elections
No full textPRQ_Replication_File_10.25.19 for Choosing the Less Convenient Way to Vote: An Anomaly in Vote by Mail Elections by Andrew Menger and Robert M. Stein in Political Research Quarterly</p
Colorado_Survey_for_Ballot_Return_07_26_19 for Choosing the Less Convenient Way to Vote: An Anomaly in Vote by Mail Elections
No full textColorado_Survey_for_Ballot_Return_07_26_19 for Choosing the Less Convenient Way to Vote: An Anomaly in Vote by Mail Elections by Andrew Menger and Robert M. Stein in Political Research Quarterly</p
Walter Rudin meets Elias M. Stein
Full text linkWalter Rudin and Elias M. Stein were giants in the world of mathemat-
ics. They were loved and admired from students and researchers to teachers
and academics, both young and old. They touched many of us through their
inspiring books at the undergraduate and postgraduate level. Although they
were leading researchers in both harmonic analysis and several complex vari-
ables, we are not aware whether they interacted and discussed mathematics. In
this article, Rudin and Stein meet mathematically through a reformulation of
the beautiful theory of Fourier series with gaps that Rudin developed in the
1950s as an equivalent Fourier restriction problem from the 1970s, a problem
Stein proposed and which remains a fundamental, central problem in Euclidean
harmonic analysis today.
Walter Rudin was born in Vienna on 2 May, 1921 and emigrated to the US
in 1945, completing his PhD at Duke University in 1949. While a C. L. E.
Moore Instructor at MIT in the early 1950s, Walter was asked to teach a real
analysis course but he could not find a textbook that he liked so he decided to
write Principles of Mathematical Analysis which despite its age, has remained
the paragon of high quality. After a stint of teaching at the University of
Rochester, he took up a position at the University of Wisconsin, Madison in
1959 where he remained until his retirement as Vilas Professor in 1991. He died
at his home in Madison on 20 May, 2010.
Elias M. Stein (known to friends and colleagues as Eli) was born in Antwerp
on 13 January, 1931 and emigrated with his family to the US in 1941, settling in
New York where Eli attended high school. He went to the University of Chicago,
received his PhD in 1955, and then went to MIT as a C.L.E. Moore Instructor
before Antoni Zygmund told Eli “it’s time to return to Chicago.” In 1963, Stein
moved to Princeton University as a full professor where he remained until he
died on 23 December, 2018.
Between 2003 and 2011, Eli expanded the presentation of Walter’s Principles
and published a series of four books aimed at advanced undergraduates. This
series is quickly becoming an important part of any young analyst’s education.However the majority of books written by Rudin and Stein are postgraduate
textbooks and research monographs (too many to list here), mainly in the areas
of harmonic analysis and several complex variables where both men were central
figures.
In this article, these two luminaries meet in the world of mathematical anal-
ysis. We look back at some important work Rudin did in the 1950s and recast
it in terms of a far-reaching problem from the 1970s that Stein gave us
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