1,721,006 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
Polymerase chain reaction for the diagnostic identification of HIVinfection
No full textThe Acquired Immune deficiency Syndrome (AIDS), caused by the Human Immunodeficiency Virus (HIV) is now a worldwide social problem. Routine diagnostic procedures to identify infected individuals are based on the presence of antibodies against viral epitopes in the serum. There is nevertheless impelling need to detect directly the virus in people infected by HIV, independently of a serological response. In this study we describe the procedure which allows amplification of a specific segment of the HIV genome, through the Polymerase Chain Reaction (PCR), in infected individuals. This new approach represents a precious tool towards the diagnosis of HIV infection, it can be easily and quickly carried out on a large scale and will be capable of identifying HIV infected subjects before the development of antibodies
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
Multiple signaling pathways of the insulin-like growth factor 1 receptor in protection from apoptosis.
No full textThe type 1 insulin-like growth factor receptor (IGF-1R), activated by its ligands, protects several cell types from a variety of apoptotic injuries. The main signaling pathway for IGF-1R-mediated protection from apoptosis has been previously elucidated and rests on the activation of phosphatidylinositol 3-kinase, Akt/protein kinase B, and the phosphorylation and inactivation of BAD, a member of the Bcl-2 family of proteins. In 32D cells (a murine hemopoietic cell line devoid of insulin receptor substrate 1 [IRS-1]), the IGF-1R activates alternative pathways for protection from apoptosis induced by withdrawal of interleukin-3. One of these pathways leads to the activation of mitogen-activated protein kinase, while a third pathway results in the mitochondrial translocation of Raf and depends on the integrity of a group of serines in the C terminus of the receptor that are known to interact with 14.3.3 proteins. All three pathways, however, result in BAD phosphorylation. The presence of multiple antiapoptotic pathways may explain the remarkable efficacy of the IGF-1R in protecting cells from apoptosis
Studies on the relationship between cell proliferation and cell death: apposite patterns of SGP-2 and ornithine decarboxylase mRNA accumulation in PHA-stimulated human limphocytes
No full textCombinations of a btk inhibitor and fluorouracil for treating cancers
No full textThe present application describes therapies for the effective treatment of colon and colorectal carcinomas. The present invention relates to a pharmaceutical kit, comprising combinations of a BTK inhibitor and fluorouracil, for the treatment of colon and colorectal carcinomas also in the case in which such carcinomas are drug resistant and therefore allows to overcome cancer drug resistance
STUDIES ON THE RELATIONSHIP BETWEEN CELL-PROLIFERATION AND CELL-DEATH - OPPOSITE PATTERNS OF SGP-2 AND ORNITHINE DECARBOXYLASE MESSENGER-RNA ACCUMULATION IN PHA-STIMULATED HUMAN-LYMPHOCYTES
No full textTo assess the relationship between cell proliferation and cell death, the mRNA accumulation of ornithine decarboxylase (ODC)and sulfated glycoprotein 2 (SGP-2) were measured in human peripheral blood lymphocytes (HPBL), 2-6 hours after stimulation with phytohemoagglutinin (PHA). A consistent amount of SGP-2 mRNA in quiescent HPBL, an early and progressive decrease of SGP-2 mRNA and a parallel increase of ODC mRNA accumulation, were observed, in PHA-stimulated HPBL, suggesting that concomitant repression of SGP-2 and induction of ODC genes contribute for the cell entering the cell cycle
- …
