1,720,995 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
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
Post-transplant lymphoproliferative disorders in liver and kidney recipients : a single institution experience
No full textBackground. Post-transplant lymphoproliferative disorders (PTLD) represent a heterogenous group of disease ranging from reactive polyclonal
hyperplasia to aggressive non-Hodgkin lymphomas (NHL) and in the majority of cases they are associated with Epstein-Barr virus (EBV).
PTLD develop as a consequence of the severe impairment of T cell function and the related reduction of T cell control on EBV latently infected B cell due to immusoppressive therapy after solid organ (SOT) or hematopoietic stem cell transplantation (HSCT). Aims. We analyzed the
clinical features, treatment and outcome of a series of adult patients who developed NHL after liver and kidney transplantation. Methods. We retrospectively studied the clinical data of 16 patients that developed
NHL occurred at our institution between 1998 and 2010. Results. 16 patients (M/F ratio 2.2) with a median age of 42 years (range 20-59) developed NHL after liver, 3 cases, and kidney, 13 cases, respectively.
Previous liver diseases were: hepatitis C virus cirrhosis in two cases and primary sclerosing cholangitis in one case; previous kidney diseases were: glomerulonephritis in 10 cases and congenital syndrome in three
cases. Median time from transplantation to PTLD was 111.5 (range 3-360) months. Six patients experienced acute transplant rejection that required intensification of immunosuppressive therapy. Hematologic
diagnosis included 12 monomorphic PTLD (10 diffuse large B lymphoma, 1 peripheral T cell lymphoma, 1 anaplastic large cell lymphoma), 2 classical Hodgkin lymphoma-type PTLD, 1 lymphoplasmacytic lymphoma and 1 extranodal marginal zone lymphoma. Histologic
diagnosis was made on lymph node and on extranodal tissue in seven and nine cases, respectively. Available histologic analysis of tumor tissue demonstrated that EBV was positive in 62% of cases. CD20 expression was available in all but two patients and was positive in 71% of cases. At diagnosis seven patients were in stage IV, two in stage
III, one in stage II and 6 in stage I; median IPI and Mayo prognostic score were 2 and 1, respectively. Ten patients presented with extranodal disease; central nervous system (CNS) involvement was not observed.
Eleven patients received immuno-chemotherapy (including anthracyclines) with rituximab and two only chemotherapy; among them only
four patients required reduction of doses because of liver/renal toxicity, and one patient experienced infective toxicity (WHO grade 1-2). One patient was treated with only radiotherapy and two patients were
observed because of indolent disease. After a median follow up of 51 months (range 1-128) from the end of therapy, 13 patients are alive and in complete remission, two are lost to follow up and one patient died for progressive disease.CONCLUSIONS: Although the limited number of patients involved, and the peculiar subset of renal and liver allograft in which the risk of PTLD is low-intemediate, our study demonstrated that the majority of our patients developed aggressive NHL and an immuno-chemoterapic regimen is feasible, well tolerated and allow to obtain an elevated percentage of remission
Immunophenotypes in "classical" B-cell chronic lymphocytic leukemia. Correlation with normal cellular counterpart and clinical findings
No full textThis study evaluates the expression of a series of membrane antigens, normally expressed by B-lymphocytes of the lymphocytic mantle and marginal zone, in 90 selected cases of "classical" (mouse red blood cell-receptor+, CD20+, CD5+, surface immunoglobulin +/-) B-chronic lymphocytic leukemia (B-CLL) with the aim of contributing toward identifying the normal counterpart of B-CLL and any correlations between surface antigen pattern and certain clinical characteristics. Clustered (CD23, 25, 39, 40, 27, 1c, w75) and unclustered (NuB1, 7F7, KiB3) monoclonal antibodies (MoAb) were tested. Almost all cases showed high reactivity to CD23, 27, w75, 39, 40, and NuB1: expression of CD1c was very low and that of 7F7, KiB3, and CD25 was variable. The reactivity of 7F7 and KiB3 was strictly correlated, and they correlated individually with CD25. Results show that the most frequent B-CLL phenotype (CD19+, 5+, 23+, 27+, 39+, NuB1+, KiB3 +/-, 7F7 +/-, and CD25 +/-) corresponds to one or more cellular subsets in the mantle zone. No correlation was found between MoAb expression, surface immunoglobulin (SIg) class or type, clinical stage, disease activity, or age at diagnosis. The only difference (statistically borderline) was the expression of 7F7 and KiB3 (in young versus old patients). This suggests that modulations in the expression of surface antigens do not affect the clinical behavior of the disease
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