1,720,974 research outputs found
C'è Vita su Marte?
No full textUna raccolta di interviste esclusive a dieci importanti personalità del mondo della scienza e dell'aerospazio, con un duplice obiettivo: da un lato, scattare una fotografia sullo stato attuale del settore spaziale, raccontandone i diversi aspetti dal punto di vista dei suoi protagonisti; dall'altro, proiettare lo sguardo del lettore verso il futuro, concentrandosi sulle prossime missioni di esplorazione planetaria, robotica e con equipaggio umano, non solo alla volta del Pianeta Rosso, ma anche della Luna e di altri corpi celesti, che vedono e vedranno l'Italia in prima fila. Attraverso il punto di vista di questo dream team spaziale, accompagnato da una bella selezione di immagini, l'Autore approfondisce alcuni fra i temi di maggior interesse e attualità, con riferimenti anche alla recente pandemia di coronavirus, all'importante ruolo della medicina spaziale e alle ricerche scientifiche in campo biomedico condotte in condizioni di microgravità sulla Stazione Spaziale Internazionale, tratteggiando un quadro in cui l'esplorazione planetaria non è che il filo conduttore, il pretesto, per intraprendere un viaggio nello spazio e nel futuro di più ampio respiro. Prefazione di Luca Parmitano. Interviste a: Piero Angela, Giorgio Bianciardi, Piero Bianucci, Walter Cugno, Giancarlo Genta, Vincenzo Giorgio, Paolo Nespoli, Linda Raimondo, Liliana Ravagnolo, Giorgio Saccoccia
The Right Key: Four Spacewalks to Repair the Alpha Magnetic Spectrometer on the International Space Station
No full textThe four space walks of astronauts Luca Parmitano, ESA astronaut, and Drew Morgan, NASA, took place from November 2019 to January 2020 to extend the lifetime of the 9 years old AMS (Alpha Magnetic Spectrometer) cosmic ray detector. This is a poignant overview of...The four space walks of astronauts Luca Parmitano, ESA astronaut, and Drew Morgan, NASA, took place from November 2019 to January 2020 to extend the lifetime of the 9 years old AMS (Alpha Magnetic Spectrometer) cosmic ray detector. This is a poignant overview of the technical difficulties and engineering challenges, including the development of special tools, overcome by a team of engineers and physicists from CERN and NASA over the 4 years planning and the challenges of the Extra Vehicular Activities (EVAs) for the astronauts. This chapter is based on interviews carried out by Paola Catapano and Claudio Bortolin to astronaut Luca Parmitano and the scientists behind the mission; these are guiding the reader through the most stressful moments of the four EVAs. The success of the EVA’s program allowed AMS-02 to be back to fully operational in space, poised to explore our Universe for many years to come
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
Astronauts training for servicing the AMS detector in Aachen
No full textAstronaut Luca Parmitano (Italy-ESA), Andrew R. Morgan (US-NASA), Christopher J. Cassidy (US-NASA), and Jeremy R. Hansen (Canada-ASC) getting to grips with the cooling system technology of the Alpha Magnetic Specrometre (AMS) at the Institue of Physics (IA) at RWTH, Aachen University. The atsronauts will service the AMS detector on the International Space Station (ISS) during a series of dedicated EVAs (Extra VEhicular Activities) planned in November-December 2019
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
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