1,721,562 research outputs found
Impact of Natural and Human Resources of Ethanol Production from Biomass
No full textThe Resources Group at IIASA is concentrating an increasing amount of effort on the WELMM analysis and/or comparison of natural and synthetic liquid fuels, conventional oil, shale oil and syncrude from tar sands, liquid fuels from coal, etc. All these are of fossil origin. But a completely different class of synthetic liquid fuel also deserves attention -- one which is derived from so-called biomass. In this class of primary importance are alcohol and methanol (from wood). Methanol is of particular interest since it can also be produced from coal, and a promising process has been developed (by the Mobil Oil Corporation) to convert methanol to much needed high grade gasoline.
Economic comparisons are relatively difficult since the stages of development of these various liquid fuels are very different -- some are still in the laboratory stage or at the pilot stage, others are very near commercial application or even already commercialized (tar sands). Also, impact on natural resources differs greatly from one type of fuel to another and from one process to another. We therefore decided to use the WELMM method to achieve a better understanding of some of the systems aspects of these liquid fuels.
Various reports and working papers have already been devoted to the topic as far as fossil fuels are concerned.
This paper opens up a new field: biomass liquid fuels. It is based on various studies -- with a different initial objective -- carried out by Bruno Lapillonne and colleagues at the IEJE. I thought it would be interesting to reshape some of the results, or reflections, according to the WELMM format. This paper shows the result of this effort, and although still preliminary is very interesting.
It is a double pleasure for me to introduce the paper, since a few years ago Bruno Lapillonne helped me to pioneer the "WELMM approach".
Finally, the paper is a good and encouraging example of continuation of close cooperation between IIASA scientists -- even long after they have returned to their home institutions
Mercedes Garcia-Arenal, La diaspora des Andalousiens, Encyclopédie de la Méditerranée, Edisud, Paris, 2003, trad. de l'espagnol par Anne-Marie Lapillonne
No full textPicard Christophe. Mercedes Garcia-Arenal, La diaspora des Andalousiens, Encyclopédie de la Méditerranée, Edisud, Paris, 2003, trad. de l'espagnol par Anne-Marie Lapillonne. In: Diasporas. Histoire et sociétés, n°3, 2003. Passages, conversions, retours. pp. 204-206
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
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
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