1,721,071 research outputs found
Rebecca Morgan Frank
No full textImage for Virginia Poets Database
Image provided by Morgan Frank. Photographer: W. Brian McConkey.https://digitalcommons.odu.edu/vapoets-images/1027/thumbnail.jp
Frequency-Dependent Electro-osmosis
No full textElectro-osmosis, the movement of a fluid with respect to solid wall when an electric field is applied tangentially to the solid wall, has been studied for many years[superscript 1]. Frequency-dependent electro-osmosis (FDE), the study of electro-osmosis when the applied electric field has a frequency component has only recently bee studied[superscript 2]. There are many potential reasons for studying frequency-dependent electro-osmosis ranging from medicine to geophysics. In medicine, electro-osmosis has been used to study a variety of human processes[superscript 3,4]. However, new areas of study may be related to electro-osmosis effects on the bodies, such as: electrical workers working in close proximity to high voltage AC electromagnetic fields, or the effects of cellular EM waves on human brains.United States. Dept. of Energy (Grant DE-FG02-00ER15041
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
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
Experimental Design Applied to Borehole DC Resistivity
No full textThis article explores various aspects of geophysical experimental design (ED)
applied to single-borehole DC resistivity. For resistivity problems, an experiment or
survey is defined as the set of electrode configurations used to collect a data-set. The
systematic design of such surveys, whose purpose is to optimally query a target, is termed
experimental design. The borehole problem is cast in cylindrical coordinates, and because
only one borehole is modeled, resistivity is treated as azimuthally invariant, permitting
the problem to be treated as a form of electrical resistivity tomography. The nature of the
experimental design space is thoroughly explored, culminating in several novel insights
into electrical resistivity tomography problems that are useful for ED. Multiple ED
functions are proposed, whose distinguishing characteristic is that they can be executed
serially, rather than en masse. That is, these functions are such that experiments can be
designed one observation at a time, instead of the traditional approach, in which the entire
experiment is designed at once. Because traditional ED approaches are fundamentally
combinatoric, the size of the experimental search space is greatly reduced by our method,
expediting the optimization algorithms and making experimental design a practical
possibility. Several basic design strategies are explored and compared with random and
standardized surveys to quantify the effectiveness of these techniques. Lastly, adaptive
experimental design procedures are examined, wherein surveys are specifically adapted
to a heterogeneous target. The results of this work show that ED produces real
improvements in data quality, as compared with standardized and random surveys
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