1,721,507 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
Metal Supported and Laminated Pd‐Based Membranes
No full textmetal supported and laminated Pd-based membranes;Pd-H system, applications of Pd alloys - to production of membrane devices for producing hydrogen;diffusion welding technique, applied - for preparing two kinds of Pd-based composite membranes;metal support use, for Pd-based membranes - overcoming drawbacks given by ceramic supports;thermomechanical press, used for preparing metal-supported membranes via diffusion welding;Pd-Ag foil, supported by steel grid after the peel test;Scheme of device, for preparing the Ni-supported membrane tube;laminated membranes - use of low-cost metals instead of Pd - its alloy, way to reduce costs of metal permeators for producing pure hydrogen;cold rolling of metal alloys, different than Pd ones - new types of dense metal membranes;preparation of laminated membranes - using low costs metals as bulk material for Pd-based membrane
Non-thermal plasma-assisted capture and conversion of CO2
Full text linkCO2 capture and conversion have been considered as a promising solution to global warming and the storage of renewable energy. However, it is a challenge to develop a process which combines capture with conversion under mild reaction conditions and instantly respond to the intermittent power supply. In this research, plasma-based CO2 capture and splitting have been investigated by using the plasma generated in a DBD reactor packed with hydrotalcite as the solid sorbent. Results indicated that plasma is capable of desorbing CO2 from the hydrotalcite surface and this desorption starts instantly after the ignition of plasma. It was also observed that the desorption stoped when the plasma was turned off, indicating the possibility for instant control of the process. CO was produced during the plasma treatment and the average conversion of CO2 during the detectable CO production period is 41.14%. Based on the technological advantages it can provide, the discussion has been made on the potential application as syngas production within the framework of “power to gas/liquid”, and CO2 emission reduction from power plants
Influence of Woody Biomass Type on Pollutant Emission in Moving Grate Furnace - Experimental Study
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