1,721,035 research outputs found
Evaluation of the role of thesympathetic nervous system in the glucoregulatory response to insulin-induced hypoglycemia in the rat.
No full textSystem Dynamics modeling of tumor growth: a possible tool for optimization of pharmacological treatment?
No full textProcess-based modeling has been widely used to simulate the behavior of all kinds of biological systems. Recent modeling studies on plants, proposed a new concept of autotoxicity as a main driver, along environmental gradients, of plant systems development (Mazzoleni et al., 2010). The release of autotoxic compounds was showed to be responsible for the generation of ring-like spatial patterns of individual plants, presenting an increase of dead biomass in their central growth zone (Cartenì et al., 2012). This has been recently associated to the levels of washing out of turnover products, showing that the occurrence of spatial patterns is dependent on the balance between positive and negative feedbacks by nutrients and toxic products respectively (Marasco et al., 2013).
In oncology, simulation modeling was used to understand and predict tumor growth and also to anticipate the effects of different therapies (Anderson and Quaranta, 2008). In this work we discuss the possible application of the autotoxicity hypothesis on modeling the growth of solid tumors. In particular, simulations are implemented showing the development and the spatial arrangement, in relation to different levels of vascularization, of 3 different layers: (i) proliferating, (ii) quiescent and (iii) necrotic cell
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
Present and future of tyrosine kinase inhibitors in renal cell carcinoma: analysis of hematologic toxicity.
No full textTyrosine kinase inhibitors (TKIs) have dramatically improved the outcome of renal cell carcinoma (RCC) patients. The use of these agents requires early and appropriate management of side effects such as hematologic adverse events (HAE), in order to avoid unnecessary dose reductions and transitory or definitive treatment discontinuations. Beyond the increased infective risk, myelosuppression contributes to TKI-related fatigue, thus reducing both patients' quality of life and overall survival (OS). However, the frequency and severity of myelosuppression vary among sunitinib, sorafenib, pazopanib and axitinib, based on their different kinase selectivity. Their activity against fms-related tyrosine kinase 3 (FLT3 or CD135) and c-kit, which are essential for survival and differentiation of hemopoietic progenitor cells, is critical to determine the hematologic toxicity profiles. This review describes the molecular mechanisms underlying the TKI effects exerted on hematopoiesis and immune response and related recent patents, of drugs already approved or still under evaluation in RCC, highlighting the potential impact of these effects on tumor response to treatment
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
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