1,721,295 research outputs found
DIFFERENTIAL PHORBOL ESTER GROWTH MODULATION AND PROTEIN-KINASE-C ISOENZYME EXPRESSION IN RAT HEPATOMA-CELLS VS NON NEOPLASTIC RAT HEPATOCYTES
No full textAcausality and violation of S-matrix unitarity for Rarita-Schwinger particles in an external electromagnetic potential
No full textIt is shown that a Rarita-Schwinger (spin 3/2) particle in an external electromagnetic field besides exhibiting acausal propagation also violates tree unitarity for semi-classical scattering. This suggests a general connection between acausal propagation and the violation of tree unitarity for high-spin (≥1) fields. © 1984 Società Italiana di Fisica
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
A new digital divide threatening resilience: exploring the need for educational, firm-based, and societal investments in ICT human capital
Full text linkThe knowledge, skills, and abilities that human capital offers create tangible and intangible assets that equip organizations to thrive. In particular, in today’s Industry 4.0 environment, training, recruiting, and retaining highly qualified ICT-ready professionals remains a problem for many organizations including educational, governmental, healthcare, and business organizations. The COVID-19 pandemic revealed the importance of digital assets to our economies, and it is also demonstrating that there is potentially a new digital divide with even worse implications for companies, economies, and society, which is threatening the resilience of business, governance, and society. In this paper, we respond to the question “how can we develop ICT human capital in our global economy in an equitable, inclusive, and purposeful manner such that not organizations thrive, but also to promote social justice and equity in our global economy?”
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
Mutina sepolta: inquadramento geologico dell’area urbana di Modena
Full text linkLe pianure alluvionali sono tra le aree più popolate al mondo per le favorevoli caratteristiche morfologiche e la ricchezza di risorse. Sono piane formate dai sedimenti abbandonati dai corsi d'acqua durante le piene. Il divagare dei corsi d’acqua e le alluvioni rendono l’evoluzione di questi ambienti estremamente dinamica, caratteristica oggi notevolmente ridotta dalla costruzione degli argini artificiali. Uno dei risultati della complessa evoluzione delle pianure è che le vestigia di antiche civiltà non sono più visibili perché sepolte sotto spessi strati di sedimenti fluviali. Tra gli esempi più noti ricordiamo le civiltà mesopotamiche, dell’Antico Egitto e dell’età del bronzo della Cina. Proprio come a Modena, dove i resti della nostra antica città fondata 2200 anni fa giacciono ben al di sotto dell’area urbana moderna, a circa 5 metri di profondità. Ma com’è possibile che questo sia accaduto? Perché Mutina è sepolta a così grande profondità? La risposta a questa domanda è nascosta all’interno dei sedimenti stessi. I sedimenti rappresentano un vero e proprio archivio di inestimabile valore per ricostruire l’evoluzione degli ambienti e delle caratteristiche climatiche nelle quali hanno vissuto i nostri antenati. E per indagare le modalità con le quali è avvenuta la sedimentazione nella pianura modenese dobbiamo fare riferimento a due recenti fenomeni geologici che hanno sconvolto il nostro territorio: il terremoto del 2012 e l’alluvione del 2014. È proprio grazie allo studio di questi eventi che possiamo scoprire come la città romana sia stata lentamente “inghiottita” nel sottosuolo. Si tratta di una storia per molti versi drammatica, che ci racconta la lotta millenaria dei nostri antenati contro le alluvioni e i terremoti
Full one-loop electro-weak corrections to three-jet observables at the Z pole and beyond
No full textWe describe the impact of the full one-loop EW terms of O(αs αEM3) entering the electron-positron into three-jet cross-section from √s = MZ to TeV scale energies. We include both factorisable and non-factorisable virtual corrections, photon bremsstrahlung but not the real emission of W± and Z bosons. Their importance for the measurement of αS from jet rates and shape variables is explained qualitatively and illustrated quantitatively
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