1,720,958 research outputs found
Studio geomorfologico del territorio di pianura a sud di Modena
No full textVengono descritte le caratteristiche geomorfologiche del territorio di pianura posto a sud di Modena e, con particolare dettaglio, del settore compreso tra Spilamberto e Vignola, zona in cui ricade un Bacino Pilota oggetto di uno studio di Ingegneria Idraulica. Lo studio geomorfologico è stato realizzato sia attraverso indagini e metodi tradizionali, come la ricerca bibliografica, il rilevamento sul terreno e lo studio delle fotografie aeree, sia con l’uso di strumentazioni e sistemi tecnologicamente avanzati, come l’analisi di fotografie aeree in formato digitale e l’utilizzo di Sistemi Informativi Territoriali (SIT). La cartografia prodotta,per il territorio della pianura a sud di Modena a scala 1:25.000 e per l’area Spilamberto-Vignola a scala 1:5.000, è la seguente: Carta del microrilievo naturale, Modello Digitale delle Altezze (DEM), Carta dei depositi superficiali, Carta geomorfologica
Microwave pyrolizer oven design
No full textThe present work describes the steps to design a pyrolizer oven that uses microwave to produce a low-cost activated carbon starting from waste tyres. A viability test on using microwave to transform waste rubber into carbon black was done using a small chamber that could be filled with 100 grams of rubber, treated with 500 W of microwave power: the result gave the start to the design of a lab scale oven that could be easily scaled up in case of success of the entire process. The cavity should be able to accept a minimum of 10 kg of waste rubber: as the process time was estimated near 10 minutes, the hour capacity was 60 kg (that roughly corresponds to twelve tyres processed per hour). The oven shape was a steel cylinder with diameter and length of 400 and 1400 mm respectively, with a total microwave power of 12 kW. Using an EM simulation tool (Concerto) it has been possible to evaluate the best input configuration of the 4 microwave generators, to optimize the port dimensions, to design a rectangular to cylindrical transitions, as well as the double quartz and Teflon window necessary to withstand the high temperature and pressure inside the oven-vessel
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
A novel cylindrical microwave plasma source
No full textMicrowave activated plasma shows advantages on obtaining high-density coatings with advanced mechanical properties, since these kinds of plasma allow to activate precursor molecules with high binding energy. We have developed a novel pulsed microwave plasma source, whose shape allows to obtain a large toroidal plasma emission zone, with a constant emission rate on the whole circumference of the emitting source. This design allows the deposition on relatively large and oddshaped samples. Plasma can be active on a large pressure range (10-2 /10 Torr), with a base pressure of 10-6 Torr to ensure a good purity for mechanical coatings. The microwave source was designed in order to fit on any kind of vacuum system equipped with a ISO standard 200 mm flange, regardless on the mounting direction. The pulsed microwave source uses a solid state power supply able to pulse the magnetron up to 8 kW peak, with a square waveform having excellent dynamic characteristic
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
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