1,721,015 research outputs found
Focus Point on Quantum information and complexity
No full textFocus Point on Quantum information and complexit
Italian Quantum Information Science Conference
No full textQuantum Information Science (QIS) is an emerging field with the potential to cause revolutionary advances in many areas, crossing physics, mathematics, engineering, informatics and even philosophy. The roots of this field go back about thirty years, when pioneers began thinking about the implications of combining quantum physics, information and computation.
In the course of supporting leading edge-research several Italian scientists have been involved in QIS-related projects.
However, the growing excitement and opportunities in QIS call for a careful examination of the role of Italy in this new field.
IQIS2008 is planned to be the first national conference dedicated to Quantum Information Science
Fingerprinting genetico e metabolico di comunità microbiche del suolo in un actinidieto sottoposto a differenti sistemi di gestione
No full textL’obiettivo del presente studio è stato quello di comparare in un sistema frutticolo di actinidia (Actinidia deliciosa (A. Chev.) C. F. Liang et A. R. Ferguson; cv. Hayward), in ambiente semiarido mediterraneo, l’effetto della gestione del suolo “innovativa” e “convenzionale” sulla composizione e sull’attività delle comunità microbiche telluriche. La tesi “innovativa” ha previsto: non lavorazione del suolo, inerbimento, apporto di compost, interramento dei residui di potatura, irrigazione guidata secondo il bilancio idrologico semplificato e interventi di potatura finalizzati all’equilibrio vegeto-produttivo. La tesi “convenzionale” è stata invece condotta mediante: lavorazione del suolo, fertilizzazione chimica, allontanamento dei residui di potatura, interventi irrigui e di potatura empirici. Le tecniche di gestione “innovative” hanno avuto come scopo quello di incrementare la fertilità chimica e biologica del suolo, sequestrare carbonio atmosferico e creare condizioni ottimali di disponibilità nutrizionale. La sperimentazione è iniziata nel 2003 a Bernalda (MT). Il campionamento del suolo ha interessato i due profili 0-10 e 10-20 cm. Per ogni tesi è stato analizzato un campione composito.di bulk soil, costituito da 20 sub-campioni prelevati secondo uno schema random. Sono state condotte le seguenti analisi: conta batterica e fungina totale, estrazione di DNA e RNA totale, retrotrascrizione di RNA, amplificazione di 16S-rDNA-rRNA batterici e 18S-rDNA-rRNA fungini mediante appositi primers, visualizzazione dei frammenti amplificati mediante mediante gel elettroforesi su gradiente denaturante (DGGE) e diversità funzionale microbica mediante metodo Biolog®. Non sono state riscontrate differenze significative (ANOVA, P≤0.05) dei valori di conta batterica sia tra i due sistemi di gestione che tra i due profili di suolo analizzati. Per quanto riguarda i risultati relativi ai 16rDNA-rRNA batterici, è stato individuato un cluster distinto corrispondente ai due profili di suolo relativi alla tesi “convenzionale”. Al contrario, i campioni della tesi “innovativa” hanno mostrato coefficienti di similarità di Dice più bassi. I profili DGGE dei 18SrDNA-rRNA fungini hanno anch’essi mostrato due diversi clusters relativi ai due differenti sistemi di gestione del suolo. Infine, i dati Biolog® hanno evidenziato che esistono differenze significative (P≤0.05) di substrate richness tra la tesi “innovativa” e quella “tradizionale”, mentre non sono state riscontrate differenze riguardanti l’indice di diversità di Shannon e la substrate eveness. Concludendo, i dendrogrammi relativi all’analisi DGGE ed i valori di substrate richness suggeriscono che il sistema di gestione “innovativo” ha determinato variazioni significative nella composizione delle comunità microbiche del suolo. Non sono invece state riscontrate differenze quantitative dei microrganismi sia tra sistemi di gestione che tra profondità. Sono ora in corso attività di ricerca per lo studio di gruppi microbici correlati agli indici di fertilità del suolo
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
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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