1,720,964 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dynamical evolution of idealised star cluster models
Get PDFThis thesis is concerned with the dynamical evolution of globular star clusters modelled as
the classical gravitational N-body problem. The models in this thesis are idealised in order to
allow the detailed study of particular dynamical aspects of the cluster evolution. Examples of
properties which tend to be omitted are stellar evolution, primordial binaries and the effect of
an external tidal gravitational field. The methods used in this thesis are gas models, N-body
models and physical arguments.
One of the main topics in this thesis is gravothermal oscillations in multicomponent star
clusters. The evolution of one-component globular clusters, systems with equal particle masses,
is quite well understood. However, the evolution of more realistic globular clusters, with a
range of particle masses, is a much more complicated matter. The condition for the on-set
of gravothermal oscillations in a one-component system is simply that the number of stars
is greater than a certain number ( ≈7000). In a multi-component system the relationship
between the number of stars at which the gravothermal oscillations first appear and the stellar
mass distribution of a cluster is a complex one. In order to investigate this phenomenon
two different types of multi-component systems were studied: two-component systems (the
simplest approximation of a mass spectrum, Chapter 2) and ten-component systems (which
were realisations of continuous power law IMFs, Chapter 3). In both cases the critical number
of stars at which gravothermal oscillations first appear are found empirically for a range of stellar
mass distributions. The nature of the oscillations themselves are investigated and it is shown
that the oscillations can be understood by focusing on the behaviour of the heavier stars within
the cluster. A parameter Nef (de nined Mtot/mmax where Mtot is the total mass and mmax
is the maximum stellar mass) acts as an approximate stability boundary for multicomponent
systems.The stability boundary was found to be at Nef ~- 12000.
In this Chapter 4, globular star clusters which contain a sub-system of stellar-mass black
holes (BH) are investigated. This is done by considering two-component models, as these
are the simplest approximation of more realistic multi-mass systems, where one component
represents the BH population and the other represents all the other stars. These systems are
found to undergo a long phase of evolution where the centre of the system is dominated by a
BH sub-system. After mass segregation has driven most of the BH into a compact sub-system,
the evolution of the BH sub-system is found to be in
uenced by the cluster in which it is
contained. The BH sub-system evolves in such a way as to satisfy the energy demands of the
whole cluster, just as the core of a one component system must satisfies the energy demands of
the whole cluster. The BH sub-system is found to exist for a significant amount of time. It takes
approximately 10trh;i, where trh;i is the initial half-mass relaxation time, from the formation
of the compact BH sub-system up until the time when 90% of the sub-system total mass is lost
(which is of order 103 times the half-mass relaxation time of the BH sub-system at its time of
formation). Based on theoretical arguments the rate of mass loss from the BH sub-system (M2)
is predicted to be (βζM)/(αtrh): where M is the total mass, trh is the half-mass relaxation time,
and α, β, ζ are three dimensionless parameters. (see Section 4.3 for details). An interesting
consequence of this is that the rate of mass loss from the BH sub-system is approximately
independent of the stellar mass ratio (m2/m1) and the total mass ratio (M2/M1) (in the range
m2/m1 ≥ 10 and M2/M1 ≈ 10-2, where m1, m2 are the masses of individual low-mass and
high-mass particles respectively, and M1, M2 are the corresponding total mass). The theory is
found to be in reasonable agreement with most of the results of a series of N-body simulations,
and all of the models if the value of ζ is suitable adjusted. Predictions based on theoretical
arguments are also made about the structure of BH sub-systems. Other aspects of the evolution
are also considered such as the conditions for the onset of gravothermal oscillation.
The final chapter (Chapter 5) of the thesis contains some concluding comments as well as a
discussion on some possible future projects, for which the results in this thesis would be useful
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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