1,720,973 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
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
Disentangling climatic interactions and detecting tipping points by means of complex networks
Full text linkEn una situación de grandes cambios climáticos, el conocimiento de el sistema Tierra ha devenido, en los últimos años, una de las tareas mas importantes para la comunidad científica. En los últimos diez años, el incremento de la potencia de cálculo de los superordenadores, así como un mejor entendimiento de los procesos físicos subyacentes la dinámica de la Tierra (como por ejemplo la formación de nubes o el intercambio de humedad entre el suelo y el atmósfera) han mejorado grandemente la cualidad de los modelos climáticos. Además, un incremento en la cobertura satelital, ha consentido la generación de bases de datos muy detalladas, llamadas "reanalysis data", que dan el estado de las variables mas importantes por la dinámica de la Tierra con una alta resolución espaciotemporal por lo menos en los últimos 40 años. La grande cantidad da datos ha sido utilizada por la comunidad científica de los climatólogos para investigar la naturaleza de los procesos de el sistema Tierra. El incremento de esas base de datos motiva el desarrollo de un nuevo análisis. En particular, dado que en primera aproximación el comportamiento climatológico de la atmósfera puede ser descrito por modelos lineales relativamente simples, el análisis no lineal ha sido muy subestimado hasta ahora. De todas maneras, muchos procesos climáticos de hecho tienen una fuerte componente no lineal. Un ejemplo emblemático es El Niño Southern Oscillation, un sistema donde el emparejamiento entre el océano y la atmósfera puede ser representado en primera aproximación como un oscilador con retroalimentación retrasada. Otro fenómeno de el sistema climático en lo cual las no linealidades juegan un papel es, sin duda alguna, la corriente a en chorro barotrópica, que está mantenida por los esfuerzos no lineales producidos por sus mismos "eddies" (remolinos). De esta forma, se establece un sistema de retroalimentaciones positivas y negativas, influenciando la variabilidad sinóptica a las altas latitudes. Dado esto, es muy importante estudiar estos fenómenos con herramientas propia de la teoría de los sistemas complejos. En particular, en esta tesis, presentaremos nuevas técnicas de análisis de datos basadas en la teoría de la información y en las redes complejas, que toman en cuenta las características no lineales de los procesos climáticos en análisis, y además aportan un nuevo punto de vista en el campo de la análisis de datos climatológicos. Las redes complejas aparecieron en los últimos años como una técnica potente para investigar una grande variedad de fenómenos donde sea posible identificar un cierto numero de componentes entre las cuales se puede establecer una relación. Siendo esto un concepto muy genérico, no es sorprendente que haya sido aplicado con éxito en muchos campos distintos, como la sociología, la biología, etcétera En particular, en esta tesis, nos enfocaremos en la construcción le redes climáticas, o sea redes donde los nodos describen áreas de la Tierra y los enlaces están dados por las relaciones entre ellas. Consideraremos enlaces computados a partir de las similitudes estadísticas de las dinámicas de una variable climatológica (como la temperatura de el aire a la superficie) en cada uno de los nodos. Este es una técnica muy general que, dependiendo de la definición de similitud estadística utilizada, permite de investigar distintas características de las variables en análisis. Definiremos la similitud estadística utilizando conceptos propios de la teoría de la información.In a scenario of major global climatic changes, the understanding of the Earth system has become in recent years an impelling task of the scientific community. In the last decade, an increased performance of supercomputers as well as a better understanding of the physical processes underlying Earth dynamics (such as cloud formation, moist exchange between soil and atmosphere, and so on) improved dramatically the quality of climate models. Moreover, an increasing satellite coverage allowed the generation of very detailed databases, called reanalysis data, that give with good precision the state of the most important dynamical variables at high spatio-temporal resolution for at least the past 40 years.
This huge amount of data is being used by the climatological scientific community to investigate the nature of the ongoing physical processes in the Earth system. The increasing of such datasets motivates the development of new analysis. In particular, since in first approximation the climatological behaviour of the atmosphere can be described by relatively simply linear models, the non-linear data analysis has been largely overlooked so far.
However, many relevant climatic processes have a strong non-linear component. A paradigmatic example is the so-called El Niño-Southern Oscillation, a coupled ocean-atmosphere process that can be sketched in first approximation as a non-linear oscillator with delayed feedback.
Another phenomenon of the Earth system in which the non-linearities play a major role is doubtlessly the barotropic polar jet, that is maintained by the non-linear stress produced by its own eddies. In this way a complex system of positive and negative feedbacks is established, influencing the dynamics of the major actor in the synoptical variability in the high latitudes.
Given these considerations, it is important to study such phenomena with tools coming from the field of complex systems. In particular, in this thesis we present new data analysis techniques based on information theory and complex networks that take into account the non-linear nature of the climate processes under examination, as well as give a new perspective to climatological data analysis.
Complex networks have emerged in the recent years as a useful and powerful tool to investigate a large variety of phenomena in which it is possible to identify a discrete number of components among which relations can be established. Being this a very general concept, it is not surprising that it found successful application in very different field such as sociology, biology, epidemics, geophysics, and so on.
In particular in this thesis we will focus in the construction of what are called climate networks, i. e. networks in which the nodes are composed by geographical locations on Earth and the links are given by relations among them. We will generally consider links computed from the statistical similarity of the dynamics of a climatological variable available at each geographical location, such as the surface air temperature (SAT). This is a quite general approach that, depending on the definition of the statistical similarity employed, allows to investigate different characteristics of the variable under examination. We will define the statistical similarity using concepts that are adopted from information theory.DOCTORAT EN FÍSICA COMPUTACIONAL I APLICADA (Pla 2007
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
- …
