1,721,111 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
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
Hybrid aerogels of spirulin and whey proteins as novel cellular solids
Full text linkThis work proposes a new strategy to obtain cellular solids of spirulin (SP) cells and whey protein (WP) using the aerogel production process. To this aim, aqueous suspensions containing 20 g/100 g of a mixture of WP and SP in different ratios, were submitted to thermal gelation. The obtained hydrogels were characterised by an intense green colour and the typical unpleasant fishy odour of SP. Hydrogels were then submitted to ethanol solvent exchange and supercritical-CO2 drying, leading to hybrid aerogels, which were analysed for physical properties (colour, density, volume contraction, firmness, microstructure). The conversion of hydrogels into aerogels partially reduced their green colour. The increase in SP in the aerogel progressively decreased its firmness, so that the aerogels obtained from suspensions containing more than 10 g/100 g spirulin were not able to maintain the continuity of the aerogel network. The latter was demonstrated by SEM to consist of dried WP microgels organised in a tri-dimensional architecture embedding SP cells. The aerogel obtained from 10 g/100 g SP suspension did not swell or disintegrate upon absorption of both water and oil. Sensory analysis also showed this sample to have negligible SP odour. These results open new possibilities in the development of hybrid cellular solids with neutral sensory properties, posing the basis for a new approach to the engineering of food tissue analogues
Real regulatory capital management and bank payouts: Evidence from available-for-sale securities
Full text linkThis study examines whether payout policies create incentives for banks to engage in cherry-picking activities using available-for-sale (AfS) securities, otherwise known as gains trading. Such activities are more likely to arise in situations in which capital ratios would otherwise constrain banks’ ability to distribute resources to shareholders. Using a large sample comprising 766 unique US banks, we find a significant and positive association between total payout and realized gains on AfS securities for banks with low regulatory capital. This is consistent with the conjecture that capital-constrained banks engage in gains trading to free up resources for dividend payments or share repurchases. When partitioning our sample, we find that capital-constrained banks realize gains and losses on AfS securities only when it is costly to decrease the payout and when the monitoring level is weaker. Further analyses reveal that banks engaging in gains trading to distribute cash to shareholders exhibit significantly higher levels of future default risk and more negative extreme bank-specific daily returns, patterns that are consistent with risk-shifting. Finally, with the advent of Basel III, the practice seems to continue among banks that chose to retain prudential filters
Corporate governance and corporate social responsibility:A continuity perspective
No full textThe chapter provides an overview of corporate social responsibility (CSR), its historical evolution and contrasting views and definitions. In this context, we propose that the way in which a firm conceives its strategy in relation to its role in our society defines the continuity between corporate governance and CSR. We then discuss the key theoretical frames that have been used to study CSR: stakeholder and legitimacy theories. We provide an overview of both normative and positive arguments, and we proceed with explaining how notions of accountability aligned with a broad conceptualization of corporate governance allow to conceive CSR as a governance problem. Finally, we discuss the evolution of the role of CSR reporting, started as a voluntary practice that is nowadays increasingly regulated and under scrutiny
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