305,221 research outputs found
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
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Células Mato na retina : caracterização morfológica e funcional de uma nova população de células perivasculares autofluorescentes em situação fisiológica e de retinopatia
No full textTese de Doutoramento em Ciências VeterináriasA retina contém diferentes populações celulares derivadas dos monócitos: macrófagos
perivasculares e células da micróglia. Neste trabalho, descreve-se a presença de um novo
subtipo de macrófagos residentes, distintos das células da micróglia, localizados no espaço
perivascular, em retinas humanas e de murganho. Estas células emitem uma fluorescência
específica e expressam constitutivamente receptores scavenger da classe A. Exibem um
movimento alternado constante, ao longo dos vasos sanguíneos, providenciando um
revestimento adicional a áreas mais delgadas da parede vascular. Para além disso,
acumulam peroxidase de rábano e lipoproteínas de baixa densidade acetiladas em
circulação, sem rotura da barreira hemato-retiniana. No conjunto, estes resultados sugerem
que estas células, com função scavenger, contribuem para o funcionamento da barreira
hemato-retiniana. Acumulam, também, ferro, em lisossomas, provavelmente por um
mecanismo de endocitose de ferritina, mediada por receptores TIM-2, sugerindo o seu
envolvimento na homeostasia do ferro na retina e em situações de alteração desta. Em
fases iniciais de degenerescência dos fotorreceptores, estas células migram para o local das
lesões, sugerindo a sua participação nos processos de retinopatia. Todos estes aspectos
são semelhantes aos descritos para as células Mato cerebrais. Por conseguinte, este estudo
estabelece, pela primeira vez, a presença de células Mato na retina.ABSTRACT -
Retinal Mato cells: morphologic and functional characterization of a new
autofluorescent perivascular cell population in physiological conditions and during
retinopathy --
The retina contains distinct populations of monocyte-derived cells: perivascular macrophages
and microglia. In this work we describe the presence in mouse and human healthy retinas of
a new subtype of resident macrophages, present in the perivascular space, different from
microglia. These cells emitted specific autofluorescence and constitutively expressed the
scavenger receptor class A. They were seen to move in an oscillatory manner along blood
vessels, providing an additional coating to thinner areas of the vascular wall. Furthermore,
these macrophages also accumulated blood-borne horseradish peroxidase and acetylated
low-density lipoprotein without blood-retinal barrier pathological disruption. Taken together
these findings suggest that these cells fulfil a major role in the scavenging of blood-borne
molecules contributing to blood-retinal barrier function. In addition, they stored iron in
lysosomes, probably by the TIM-2 mediated binding of ferritin, indicating they probably are
involved in retinal iron homeostasis and related disorders. These cells were also early
detected at lesions during photoreceptor degeneration, suggesting a possible role in the
onset and development of retinopathy. All these features are consistent with those described
for brain Mato cells. Thus, this study shows, for the first time, the presence of autofluorescent
perivascular Mato cells in the retina.CIISA\72.retina, financiado pelo CIISA - Centro de Investigação Interdisciplinar em
Sanidade Animal, Faculdade de Medicina Veterinária, Universidade Técnica de Lisboa
Investigador principal: Luísa Mendes-Jorge. FIS PI061837, financiado pelo Instituto de Salud Carlos III e CIBER de Diabetes y
Enfermedades Metabolicas Asociadas
Investigador principal: Jesús Ruberte Parí
Mining e-mail content for author identification forensics
No full textWe describe an investigation into e-mail content mining for author identification, or authorship attribution, for the purpose of forensic investigation. We focus our discussion on the ability to discriminate between authors for the case of both aggregated e-mail topics as well as across different email topics. An extended set of e-mail document features including structural characteristics and linguistic patterns were derived and, together with a Support Vector Machine learning algorithm, were used for mining the e-mail content. Experiments using a number of e-mail documents generated by different authors on a set of topics gave promising results for both aggregated and multi-topic author categorisation
Variations on the Author
No full text“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
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