1,720,961 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
Master of Science
Get PDFthesisActivated sludge process (ASP) is the most common method for wastewater treatment of domestic wastewater. In ASP, a consortium of microbes is used to consume different contaminants of concern using redox chemistry in which case, microbes gain energy through substrate partitioning. The main contaminants of concern are carbon, nitrogen (N) and phosphorus (P) in municipal wastewater with the latter two collectively known as nutrients. ASP is a robust process with proven performance metrics. Between nitrogen and phosphorus, phosphorus is the main nutrient of concern because it is often cited as a limiting nutrient for biota. Furthermore, as a useful fertilizer, phosphorus is essential for plants and as a result, there is a global demand for P. Unfortunately, P is limited in nature with only five countries in the world supplying the total P demands. Hence, the focus of wastewater treatment management is changing from the removal of P to the recovery of P. A study was conducted at Central Valley Water Reclamation Facility (CVWRF) to evaluate the P recovery potential at different segments of the treatment train. A P mass balance was also conducted under a hypothetical scenario, where enhanced biological P removal was assumed at CVWRF. Results show that while aluminum was the superior chemical at removing phosphorus, all chemicals were successful at a rate of over 80% P removal at the optimum pH value. Magnesium, on the other hand, was superior at nitrogen removal. The sludge and filtrate have higher dissolved P loads, making them ideal areas for phosphorus removal and recovery. The installation of a Biological Nutrient Recovery (BNR) system with Enhanced Biological Phosphorus Removal (EBPR) would also release up to 7 times the amount of phosphorus and make it available for recovery in the sludge handling phase compared to a classic ASP. Based on these results, the ideal system for recovery of phosphorus and nitrogen would be a BNR process combined with a struvite recovery system. The overall evaluation of a combination of analyses concluded that shifting to a form of recovery that includes a combination of EBPR on the liquids stream followed by precipitation on the solids stream could recover a vast amount of the phosphorus coming into the treatment plant. This would not only make Central Valley Water Reclamation Facility more sustainable and efficient, but could imply an economic value as well, if phosphorus was sold to other industries
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Catastrophe squared: COVID-19 vaccine inequity in humanitarian crises
Get PDFThe COVID-19 pandemic has caused physical, social, and economic devastation all around the world. While more manageable case numbers and immunisation efforts seem to indicate that the world has come a long way in controlling the virus, there is great inequity in vaccination numbers around the world. Low-income countries have only received 14 doses per 100 people—13-fold lower than the 182 doses per 100 people in upper-middle income and high-income countries. This paper highlights the disparity of COVID-19 vaccination rates in high-income countries versus those afflicted with crises and raises the need for linking pandemic response with humanitarian assistance
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