1,720,968 research outputs found
Nascita e sviluppo dell'Ingegneria all'Università di Bologna
No full textPresentare la nascita e lo sviluppo dell’Ingegneria nell’Università di Bologna è un argomento notevolmente complesso, perché può essere affrontato da molteplici punti di vista e richiede il contributo dei professori appartenenti ai diversi raggruppamenti disciplinari. L’Ingegneria all’Università di Bologna si è sviluppata nel tempo in diverse sedi (a Bologna che è la sede principale, e recentemente a Ravenna, Forlì, Cesena) e la struttura che la rappresenta ha assunto nel tempo nomi diversi: Scuola di Applicazione per Ingegneri (dal 1877 al 1935), Facoltà di Ingegneria (dal 1935 al 2012), Scuola di Architettura e Ingegneria (dal 2012 al 2018); a partire dall’Anno Accademico 2018/19 viene attivata la Scuola di Ingegneria, a cui afferiscono sei dipartimenti esclusi i dipartimenti di Ingegneria civile, chimica, ambientale e dei Materiali (DICAM) e di Architettura (DA), che, pur mantenendo uno stretto collegamento con la Scuola, tuttavia non afferiscono ad essa. In ogni caso, la Facoltà/Scuola ha mantenuto nel tempo una sua precisa identità culturale alla quale si possono ricondurre i molteplici insegnamenti che attualmente la costituiscono, come risulta evidente dai diversi saggi che compaiono in questo volume: essa è caratterizzata da un approccio razionale allo studio del mondo fisico, dalla ricerca delle leggi matematiche che caratterizzano i modelli che lo rappresentano, dall’uso di queste leggi per la realizzazione degli oggetti richiesti dalla società civile nel suo sviluppo storico (oppure che vengono da essa proposti) accompagnandone la loro descrizione mediante opportuni modelli. La Facoltà ha un insieme di competenze ad elevato livello culturale in molti ambiti dell’organizzazione della società civile e in molte delle esigenze che la caratterizzano sul piano tecnico; competenze che possono essere di grande aiuto ad essa, perché consentono di avere un approccio culturale a cui consegue una migliore consapevolezza delle molteplici soluzioni, ciascuna con i suoi aspetti positivi e negativi, ai complessi problemi che la caratterizzano
A nonlinear dynamic model for performance analysis of large-signal amplifiers in communication systems
Full text linkA new nonlinear dynamic model of large-signal amplifiers based on a Volterra-like integral series expansion is described. The new Volterra-like series is specially oriented to the modeling of nonlinear communication circuits, since it is expressed in terms of dynamic deviations of the complex modulation envelope of the input signal. The proposed model represents a generalization, to nonlinear systems with memory, of the widely-used amplitude/amplitude (AM/AM) and amplitude/phase (AM/PM) conversion characteristics, which are based on the assumption of a practically memoryless behavior. A measurement procedure for the experimental characterization of the proposed model is also outlined
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
The DTCM characterization approach for the qualification of dynamic non-linearities within A/D channels
No full textThe behaviour of both stand-alone ADCs and entire A/D acquisition channels under time-varying input excitations exhibits non-idealities which are peculiar to the dynamic operation and can not be described by the characteristics of the static response. In addition, even the common dynamic parameters suggested by the current standards usually fail to separately qualify the purely-dynamic non-linearities from all other perturbation effects on the system response. In this paper, the features of the Discrete-Time Convolution Model are discussed by pointing out the properties of the general approach from which it derives, with particular emphasis to the capability of separately describing all the system non-idealities on the basis of their nature. It will be shown how the DTCM characterization methodology and the set of related model parameters represent a suitable resource towards the separate qualification of dynamic non-linearities in A/D channels
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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