1,721,194 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
Modifications of a Rail/Wheel Wear Simulator to\ud Measure Rail Curve Lubricant Performance
No full textWear of railroad rolling stock and rails costs\ud
millions of dollars each year in all rail systems\ud
throughout the world. The rail industry has\ud
attempted to address flange wear using lubricants.\ud
The choice of rail curve lubricant is currently not\ud
based on a standards approach. Measuring rail\ud
curve lubricant performance in a laboratory\ud
environment can address this information shortfall\ud
and reduce wear in rail rolling stock and\ud
infrastructure.\ud
The equipment used to measure rail curve\ud
lubricant performance consists of two dissimilar\ud
disks, of matching contact profile, rotating in\ud
contact with one another. The outcome from the\ud
modifications was the ability to quantify rail curve\ud
lubricant performance using three performance\ud
criteria and to measure the changes in apparent\ud
viscosity with respect to accumulated strain\ud
damage.\ud
This paper will provide a description of the\ud
equipment and modifications to the rail/wheel\ud
wear simulator and preliminary results to display\ud
the outcomes of the modifications
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
Carbon nanotube composite sensor for structural health monitoring of bridge structures
No full textBridges are important infrastructures of all nations and are required for transportation of goods as well as human. A catastrophic failure can result in loss of lives and enormous financial hardship to the nation. Although various kinds of sensors are now available to monitor the health of the structures due to corrosion, they do not provide permanent and long term measurements. This paper investigates the fabrication of Carbon Nanotube (CNT) based composite sensors for corrosion detection of structures. Multi-wall CNT (MWCNT)/Nafion composite sensors were fabricated to evaluate their electrical properties for corrosion detection. The test specimens were subjected to real life corrosion experimental tests and the results confirm that the electrical resistance of the sensor electrode was dramatically changed due to corrosion
A Comparative Study of Control Algorithm Performance on a Piezo-Actuated Flexible Structure
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