1,720,970 research outputs found
Graphic approach to computer storage of data: A computerized program for bronchoscopy(poster)
No full textCo-dogestion of sewage sludge and organic fraction of municipal solid waste
No full textThe facility exploited for enabling Waste Organic Fraction (WOF) continuous flow in the aerobic biological section of an existing Mechanical Biological Treatment plant has an important influence on the physical parameters of the process. Temperature and Volatile Solids remains quite constant among the inlet and outlet sections around 70°C and 50% respectively. The stabilization level of the WOF evaluated by the Dynamic Respirometer Index Potential (DRIP) of several samples withdrawn along the basin width is significantly increased in the first half portion of the aerobic basin remaining quite constant in the second half. This is mainly a consequence of the strong Humidity reduction that becomes rapidly lower than 40% leading to bacterial activity inhibition. The simulation model developed in this work shows that the mean Retention Time of the WOF inside the aerobic basin is of about 14-16 days, being strongly influenced by the WOF daily inlet rate. Further, the model put in evidence that the aerobic section seems able to allow the WOF to achieve a DRIP lower than 1000 mgO2/kgVSh, if an adequate amount of water is added during the process
Renewable energy production from waste water treatment plants by co-anaerobic digestion with biodegradable waste: a real case study
No full textThe anaerobic co-digestion of the Sewage Sludge (SS) arising from an existing Waste Water Treatment Plant (WWTP) mixed at different proportion with the Organic Fraction of Municipal Solid Waste (OFMSW) has been investigated by the aid of batch laboratory tests. The amount of Biogas produced is strongly influenced by the amount of OFMSW exploited. The maximum value of about 600 ml/gTS is achieved for a OFMSW Total Solids concentration in the SS of 6% w/w. The maximum net electrical renewable energy producible by the biogas arising from the anaerobic section of the WWTP is of about 6,700 kWh per day. The maximum size of the Internal Combustion Engine fuelled with the biogas is of about 330 kWe
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
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
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