1,727,686 research outputs found
Aquatic Toxicology Notes: Diquat
No full textDiquat is applied directly to plants along ditch banks and within aquatic systems. It may also be applied to ponds, lakes, and drainage ditches to control algae and submersed aquatic weeds. This 7-page fact sheet introduces users of diquat to the physical, chemical, environmental, and ecological properties of this herbicidal active ingredient relative to the aquatic environment. Written by P. Chris Wilson and Jun Wu, and published by the UF Department of Soil and Water Science, October 2012
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
Dynamic testing of a laboratory model via vision-based sensing
No full textIn the class of not-contact sensors, the techniques of vision-based displacement estimation enable one to
gather dense global measurements of static deformation as well as of dynamic response. They are becoming
more and more available thanks to the ongoing technology developments. In this work, a vision system,
which takes advantage of fast-developing digital image processing and computer vision
technologies and provides high sample rate, is implemented to monitor the 2D plane vibrations of a
reduced scale frame mounted on a shaking table as available in a laboratory. The physical meanings of
the camera parameters, the trade-off between the system resolution and the field-of-view, and the upper
limitation of marker density are discussed. The scale factor approach, which is widely used to convert the
image coordinates measured by a vision system in the unit of pixels into space coordinates, causes a poor
repeatability of the experiment, an unstable experiment precision, and therefore a global poor flexibility.
To overcome these problems, two calibrations approaches are introduced: registration and direct linear
transformation. Based on the constructed vision-based displacement measurement system, several
experiments are carried out to monitor the motion of a scale-reduced model on which dense markers
are glued. The experiment results show that the proposed system can capture and successfully measure
the motion of the laboratory model within the required frequency band
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
Aquatic Toxicology Notes: Endothall
No full textEndothall is the herbicidal active ingredient found in commercial formulations labeled for weed control in aquatic systems and on ditch banks. It is also used as a defoliant and desiccant in some terrestrial situations (e.g., in potato, hops, cotton, clover, and alfalfa production). This 7-page fact sheet introduces users of endothall to the physical, chemical, environmental, and ecological properties of this herbicidal active ingredient relative to the aquatic environment. Written by P. Chris Wilson and Jun Wu, and published by the UF Department of Soil and Water Science, October 2012
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
Supplemental Material, sj-pdf-1-arx-10.1177_17298814211042730 - Autonomous land vehicle path planning algorithm based on improved heuristic function of A-Star
No full textSupplemental Material, sj-pdf-1-arx-10.1177_17298814211042730 for Autonomous land vehicle path planning algorithm based on improved heuristic function of A-Star by Jing Zhang, Jun Wu, Xiao Shen and Yunsong Li in International Journal of Advanced Robotic Systems</p
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
- …
