1,721,048 research outputs found
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
Nonlinear refraction of hard x-rays.
No full textWe study the nonlinear refraction of x rays in highly ionized condensed matter by using a classical model of a cold electron plasma in a lattice of still ions coupled with Maxwell equations. By employing a group-theoretical technique, we reduce the governing equations of the system to an integrable set of nonlinear ordinary differential equations, discussing the existence and stability of nonlinear waves. This allows us to define the effective Kerr coefficient n2 at x rays. With reference to real-world crystalline materials (B, C, Li, and Na), we consider beam self-defocusing and predict that nonlinear processes become comparable to the linear ones for focused beams with powers on the order of mc3/r0 (≈10 GW), the classical electron power. As a consequence, nonlinear phenomena are expected to largely affect imaging experiments in currently exploited x-ray free-electron lasers and in their future developments
How to deliver open sustainable innovation: An integrated approach for a sustainable marketable product
No full textThe adoption of open innovation and peer production, powered by 3D printing technology, is transforming traditional manufacturing methods towards a "third industrial revolution". The purpose of this research is to provide empirical evidence for an integrated approach, based on collaborative product development and peer production, combined with 3D printing, to deliver more sustainable, yet competitive, marketable products. In particular, this experimental study is conducted in the context of mobile forensics, an emerging market where limited expensive products exist and alternative solutions are needed. The technical viability and economic feasibility of the prototype developed in this research validate the proposed integrated approach, which could be a game-changer in the field of mobile forensics, as well as in other sectors. The sustainability improvements with this approach are a reduction of the total cost, thereby making it affordable for lower income users, and a decrease in energy consumption and pollutant emissions. The validated integrated approach offers start-up opportunities to develop and deliver more sustainable, marketable products, towards the paradigm of Open Sustainable Innovation. While the device developed and tested in this research has similar features to existing products, the methodology, implementation, and motivation are original
La prevenzione del doping nel setting scolastico: rilevazione dei bisogni ed esperienze di apprendimento creativo in giovani adolescenti abruzzesi
No full textINTRODUZIONE: Il ricorso ad aiuti esterni per il miglioramento delle performances
motorie e dell’aspetto fisico costituisce un fenomeno in crescita
fra i giovani a livello nazionale e internazionale.
OBIETTIVI: Valutare la pertinenza di un intervento di prevenzione del doping
in ambito scolastico e sperimentare un approccio educativo di tipo creativo.
MATERIALI E METODI: Sono stati arruolati 331 adolescenti di età compresa
tra 16 e i 18 anni di 8 scuole superiori abruzzesi che hanno seguito
l’intervento educativo durante l’attività sportiva organizzata da insegnanti
affiliati alla FIGC. Nel dicembre 2006 è stato somministrato un questionario
contenente 21 domande relative a informazioni, atteggiamenti e comportamenti
su integratori alimentari e farmaci dopanti. Successivamente,
durante incontri con esperti, gli studenti hanno indicato argomenti di interesse,
posto domande ed espresso opinioni sul fenomeno. Infine, è stato
dato loro il compito di creare un messaggio antidoping di tipo pubblicitario.
RISULTATI: Il campione è costituito prevalentemente da maschi (76.1%).
Il 66.2% degli intervistati è consapevole che il doping è “una cosa illegale”
e il 65.0 % individua correttamente le classi di sostanze vietate. I tre quarti
del campione (73.4%) riconosce che gli integratori vanno assunti per una
carenza alimentare specifica, e riguardo al loro uso, il 24.2% afferma di
assumere ferro, mentre meno del 7 % dichiara di consumare altri integratori.
Praticamente irrilevante è l’uso di farmaci dopanti dichiarato (1%).
Sono stati creati otto messaggi originali, costituiti da immagini corredate di
slogans riconducibili a diversi contenuti: rischi per la salute, lealtà sportiva
e motivazioni e autoefficacia nell’adozione di comportamenti protettivi.
CONCLUSIONI: Alla luce dell’interesse e del coinvolgimento che gli adolescenti
hanno dimostrato nei confronti del doping, la scuola si è rivelata
un setting strategico, nel quale approcci educativi molteplici (informazione,
formazione interattiva, creatività) possono rispondere a un bisogno di
salute sentito dagli studenti e dai loro insegnanti
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
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