1,720,970 research outputs found
IPRP – Integrated Pyrolysis Regenerated Plant – Gas Turbine and externally heated Rotary Kiln as a biomass and waste to energy conversion system. Influence of thermodynamic parameters
No full textPublic private partnerships value in bioenergy projects: Economic feasibility analysis based on two case studies
No full textTHE IPRP TECHNOLOGY: from concept to demonstration.
No full textBiomass and wastes are distributed and renewable energy sources that may contribute effectively to sustainability. Integrated Pyrolysis Regenerated Plant (IPRP) concept is based on a Gas Turbine (GT) fuelled by pyrogas produced in a rotary kiln slow pyrolysis reactor; waste heat from GT is used to
sustain the pyrolysis process. The IPRP plant provides a unique solution for microscale (below 500 kW) power plants, opening a new and competitive possibility for distributed biomass or waste to energy conversion systems. To this aim a IPRP pilot plant, provided with a 80 kW micro-gas turbine, was designed and built, at the Terni facility of the University of Perugia. When used for 6,000 hours per year, electricity production is 400 MWh/year with a biomass consumption of 730 tonnes; the plant would avoid 290 t/year of CO2 in atmosphere. Data obtained with experimental activity will be used to tune simulation models which are fundamental for process optimization being the key issue for the estimation of pyrolysis product yields (char, tar, and syngas) and LHV (Lower Heating Values). This could give important information about the overall process efficiency and about mass and energy balances that characterize the plant for different operating conditions. A measuring device to determine tar content in syngas is necessary for mass and energy balance and to obtain samples for analytical characterization. To this aim on the basis of technical specification CEN/TS 15439:2006 a sampling line for tar has been designed and realized at the laboratories of the University of Perugia
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
Numerical Analysis of the Use of Vegetable Oil-Tars Mixtures From Syngas Scrubbing in a Microturbine Combustor
No full textDispelling 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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