1,721,176 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
INDUZIONE SELETTIVA DI MORTE CELLULARE PER CATASTROFE MITOTICA IN CELLULE TUMORALI: EFFETTI DELLA PURINA SINTETICA REVERSINA
Get PDFReversine, a synthetic purine isolated from a combinatorial library, has been shown to induce the de-differentiation of adult cells, including fibroblasts, to stem-cell-like progenitors, as treated cells could be induced to differentiate into several cell types, thus creating a new stem cell source for tissue regeneration. The observation that reversine treatment, while inducing cell reprogramming, also caused growth arrest, suggested its possible application as an anticancer agent. Herein we reported reversine lethal effects on several tumor cells from different tissues and we clarified the mechanism of cell death induced by the molecule. Moreover, this molecule seems to be selective for cancer cells because of the lack of the induction of cell death in normal fibroblast with the same condition of treatment. Comparison of reversine effects on the cell cycle of normal and cancer cells also elucidated the mechanism of its dual activity as de-differentiating or anti-cancer drug, depending on the cell type and the status of the cell cycle checkpoints
Variations on the Author
Get PDF“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
Get PDFWe 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 Demographic Transition and the Ecological Transition: Enriching the Environmental Kuznets Curve Hypothesis
Get PDFThe impact of population growth on the environment is an issue that is highly debated yet comparatively under-researched empirically. This is true despite a vast number of published articles on the link between population and environmental changes speculating on the sign of the environmentpopulation elasticity. Although the issue can ultimately only be settled at the empirical level, the above contributions have been largely speculative. It was only in the mid-1990s that population was accounted for in the empirical work on the relationship between environmental quality/degradation and income within the framework of the Environmental Kuznets Curve (EKC) hypothesis. While empirical EKC investigations have provided a useful contribution to the issue, a further important step can be made. Population in the EKC hypothesis is not treated like income but it serves, so to speak, just as a normalizing variable. As it turns out, however, also for population can we formulate a hypothetical behavior of its evolution over time vis-à-vis income, that can be accommodated within an EKC framework. This is the Demographic Transition. With the exception of Baldwin (1995) none of the studies mentioned so far have investigated the nexus between pollution, environmental degradation, and income within the conceptual framework of the two transitions: the demographic and the ecological one. The present paper represents the first econometric analysis of Demographic and Ecological Transitions. We incorporate the former into the EKC framework, thus obtaining an enriched EKC hypothesis. Very long time series for 17 OECD countries in the case of CO2 emissions support our empirical approach
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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