1,720,958 research outputs found
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
Compact, Regenerable Trace Contaminant Control for Advanced Portable Life Support System
No full textChristian Junaedi, Precision Combustion, Inc.Kyle Hawley, Precision Combustion, Inc.Codruta Loebick, Precision Combustion, Inc.ICES402: Extravehicular Activity: PLSS SystemsThe 48th International Conference on Environmental Systems was held in Albuquerque, New Mexico, USA on 08 July 2018 through 12 July 2018.Trace contaminants that are introduced into the ventilation loop of a spacesuit via metabolic processes, off-gassing of spacesuit materials, and by-products of the amine used in the Rapid Cycle Amine (RCA) system can be removed using activated charcoal. Although effective, the drawbacks of using activated charcoal are a bulky system with low regeneration capability, a reliance on consumables, significant power consumption, and consequently high associated life cycle operating cost. The charcoal bed cannot be regenerated solely by vacuum, and thus has to be regenerated on-base since it requires heat treatment along with a sweep gas or vacuum to remove the desorbed contaminants.
Precision Combustion, Inc. (PCI) has developed and demonstrated a new sorbent material for the TCCS in advanced spacesuit applications based upon PCI’s novel nanomaterials, enabling a compact, low pressure drop, and regenerable TCC device for efficient removal of NH3 and CH2O. A combination of novel sorbents, tailored for specific contaminants of interest, and structured support substrates permit practical implementation of the sorbent for a vacuum-regenerable (without heating requirement) TCCS with high bed utilization and high removal efficiency, while also minimizing the competitive sorption with moisture and CO2. The resulting TCCS bed, with enhanced mass transfer and regenerable capability, offers the potential for real-time, on-the-suit sorbent regeneration, reduced logistical burden associated with bed replacement or thermal regeneration, and offers significant volume and weight reductions of the TCCS module. In the past year, PCI has been improving the performance of the sorbent materials for the removal of NH3 and CH2O and developing operational windows for the improved TCCS prototype. In this paper, the performance metrics and operational requirements of the improved TCCS beds consisting of the new sorbents will be presented. These include results from performance testing of the prototype at PLSS operating conditions, including capacity, regenerability, and multi-cycle testing
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
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
Evaluation of Compact, Regenerable Trace Contaminant Control for Removal of Ammonia and Other Trace Constituents
Get PDFChristian Junaedi, Precision Combustion, Inc.Hani Hawa, Precision Combustion, Inc.Codruta Loebick, Precision Combustion Inc.ICES402: Extravehicular Activity: PLSS SystemsThe 50th International Conference on Environmental Systems was held virtually on 12 July 2021 through 14 July 2021.The objective of this development effort supported by NASA is to evaluate a new Trace Contaminant Control (TCC) technology that is capable of selectively removing trace contaminants from the atmosphere in an advanced spacesuit system, with focus on power, size, and removal capability. In the current spacesuit Portable Life Support System (PLSS) architecture, the trace contaminants that are introduced into the ventilation loop of a spacesuit via metabolic processes, off-gassing of spacesuit materials, and by-products of the amine used in the Rapid Cycle Amine (RCA) system are removed using activated charcoal. Although effective, the drawbacks of using activated charcoal are a bulky system with low regeneration capability, a reliance on consumables, significant power consumption, and consequently high associated life cycle operating cost. The charcoal bed cannot be regenerated solely by vacuum, and thus has to be regenerated on-base since it requires heat treatment along with a sweep gas or vacuum to remove the desorbed contaminants.
Precision Combustion, Inc. (PCI) has been developing and evaluating new regenerable sorbent materials for the TCC system in advanced spacesuit applications based upon its novel nanomaterials previously developed for terrestrial applications, enabling a compact, low pressure drop, and regenerable TCC device for efficient removal of ammonia and formaldehyde, among other constituents. A combination of novel sorbents, tailored for specific contaminants of interest, and structured support substrates permit practical implementation of the sorbent for a vacuum-regenerable (without heating requirement) TCC bed with high bed utilization and high removal efficiency, while also minimizing the competitive sorption with moisture and CO2. In this paper, we plan to highlight the sorbent engineering and optimization process, TCC bed design for proof-of-concept evaluation, and sorbent performance, including life cycle and environmental testing at the anticipated operational conditions
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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