1,721,028 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
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
Abstract 4577: Appropriately delivered curcumin causes recruitment of natural killer cells into glioblastoma brain, stabilizing M1 polarization of tumor-associated microglia
No full textAbstract
Glioblastoma (GBM) is the most insidious form of primary adult brain tumor with a mean life expectancy of 12-24 months. Previously, we have used the non-invasive strategies of (1) intranasal delivery of a glioblastoma-directed curcumin (CC) adduct (CC-CD68Ab) and (2) the intraperitoneal (i.p.) infusion of a lipid-encapsulated formulation of CC-phytosome to rescue orthotopically GL261-implanted GBM mice and study the effect of CC on the phenotype of the tumor-associated microglial cells (TAMs). Both treatment regimens not only caused tumor remission in 50-60% of GL261-implanted GBM mice, but also induced a dramatic change in the tumor-associated Iba1+ TAMs, suppressing the tumor-promoting Arginase1high, IL10high, iNOSlow, IL12low M2-type TAMs, while simultaneously inducing the Arginase1low, IL10low, iNOShigh, IL12high M1-type TAMs. Concurrently, we observed a marked induction and phosphorylation-mediated activation of microglial p65 NF-kB and STAT1, with concomitant suppression and inactivation of STAT3. p-STAT1high, p-STAT3low M1 microglia are known to cause IL12-dependent recruitment/activation of tumoricidal NKp46high natural killer (NK) cells. In determining the kinetics of CC-induced M1 repolarization of M2-TAMs, we observed that five days of CCP treatment (i.p.) was sufficient to induce a dramatic change in the tumor-associated Iba1+ TAMs, inhibiting the tumor-promoting M2-type TAM population, while activating M1-type microglia. As expected, we observed a concomitant recruitment of NKp46high NK cells into the GBM tumor. Cognizant of the fact that NK cells activate and stabilize the M1-microglia, we eliminated the NK cells in these GBM mice using the NK cell-targeted antibody NK1.1 Ab to observe a significant reduction in CC-evoked repolarization of TAMs. Our results demonstrate a unique oncoimmunotherapeutic function of CC, which when appropriately delivered, not only eliminates GBM directly, but also indirectly elicits recruitment and activation of tumoricidal NK cells and M1-TAMs. Furthermore, maintenance of this CC-evoked M1 phenotype is contingent upon CC-induced recruitment and activation of NK cells. Thus, when delivered appropriately, CC functions on GBM both directly as well as by stimulating and recruiting an army of immune cells that eliminate both GBM and GBM-initiating cells.
Citation Format: Sumit Mukherjee, Angela Fried, Rahman Hussaini, Richard White, Aheli Chatterjee, Probal Banerjee. Appropriately delivered curcumin causes recruitment of natural killer cells into glioblastoma brain, stabilizing M1 polarization of tumor-associated microglia [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 4577. doi:10.1158/1538-7445.AM2017-4577</jats:p
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
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