1,722,402 research outputs found
On systems of cogenerators of epireflective subcategories
No full textLet C be an epireflective subcategory of a topological (or initially structured) category A and for any cardinal number alfa, let C(alfa) be the class of objects X of C such that the cardinality of the set UX is less or equal to alfa. We prove that we can associate to C a class C of A-objects such that for any alfa there exists Y-alfa in K with the property that each Y in C(alfa) is Y-alfa initial w.r.t. (U(A(Y,Y-alfa)), UY-alfa)
A 125 MHz ECL digital oscillator synchronizable both in frequency and in phase.
No full textIn this paper a 125 MHz digital oscillator with good frequency stability and instantaneous phase lock capability is presented. The circuit, that was developed using the Motorola “ECLPS” and “ECLPS lite” logics, allows a frequency lock independent of the phase lock, which is a feature not present in conventional PLL circuits
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
Effects of the COVID-19 Emergency and National Lockdown on Italian Citizens’ Economic Concerns, Government Trust, and Health Engagement: Evidence From a Two-Wave Panel Study
No full textPolicy Points Preventive measures such as the national lockdown in Italy have been effective in slowing the spread of COVID-19. However, they also had psychological and economic impacts on people’s lives, which should not be neglected as they may reduce citizens’ trust and compliance with future health mandates. Engaging citizens in their own health management and in the collaboration with health care professionals and authorities via the adoption of a collaborative approach to health policy development is fundamental to fostering such measures’ effectiveness. Psychosocial analysis of citizens’ concerns and emotional reactions to preventive policies is important in order to plan personalized health communication campaigns. Context: Because of the COVID-19 pandemic, between February 23 and March 8, 2020, some areas of Italy were declared “red zones,” with citizens asked to stay home and avoid unnecessary interpersonal contacts. Such measures were then extended, between March 10 and May 4, 2020, to the whole country. However, compliance with such behaviors had an important impact on citizens’ personal, psychological, and economic well-being. This could result in reduced trust in authorities and lowered compliance. Keeping citizens engaged in their own health and in preventive behaviors is thus a key strategy for the success of such measures. This paper presents the results from a study conducted in Italy to monitor levels of people’s health engagement, sentiment, trust in authorities, and perception of risk at two different time points. Methods: Two independent samples (n = 968 and n = 1,004), weighted to be representative of the adult Italian population, were recruited in two waves corresponding to crucial moments of the Italian COVID-19 epidemic: between February 28 and March 4 (beginning of “phase 1,” after the first regional lockdowns), and between May 12 and May 18 (beginning of “phase 2,” after the national lockdown was partially dismissed). Respondents were asked to complete an online survey with a series of both validated measures and ad hoc items. A series of t-tests, general linear models, and contingency tables were carried out to assess if and how our measures changed over time in different social groups. Findings: Although sense of self and social responsibility increased between the two waves, and trust toward authorities remained substantially the same, trust in science, consumer sentiment, and health engagement decreased. Our results showed that while both the level of general concern for the emergency and the perceived risk of infection increased between the two waves, in the second wave our participants reported being more concerned for the economic consequences of the pandemic than the health risk. Conclusions: The potentially disruptive psychological impact of lockdown may hamper citizens’ compliance with, and hence the effectiveness of, behavioral preventive measures. This suggests that preventive measures should be accompanied by collaborative educational plans aimed at promoting people’s health engagement by making citizens feel they are partners in the health preventive endeavor and involved in the development of health policies
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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