1,721,753 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
Are leukocyte and platelet abnormalities and complete blood count ratios potential prognostic markers in canine sepsis?
Full text linkBackground: Sepsis is a common disease in which early diagnosis and prognosis assessment are the main aims in order to arrange a prompt and effective treatment. Objectives: (1) To compare leukogram parameters (WBC, segmented and band neutrophils,lymphocytes,monocytes),plateletcount(PLT),meanplateletvolume(MPV), and some leukocyte/platelet ratio such as NLR, NBNLR, PLR, and MLR between dogs with systemic inflammatory response syndrome (SIRS) and sepsis. (2) To investigate any difference in the trend of these latter parameters between survivors and non-survivors septic dogs. Animals: 57 dogs with confirmed sepsis and 57 dogs with non-septic SIRS. Methods: A review of the medical records was conducted in order to find dogs with sepsis. Sepsis was defined as the presence of an infectious focus with fulfillment of systemic inflammatory response syndrome criteria (SIRS). Septic dogs had to have a CBC at admission and another CBC within 48h from the previous timepoint. Purebreds with CBC breed-related abnormalities were excluded, together with dogs without confirmed sepsis and dogs with only a single CBC. NLR, NBNLR, PLR, and MLR were calculated. Univariate analysis of all blood parameters studied was assessed between SIRS and septicdogs. Generalized Estimating Equations models for repeated measures were used to test if the blood parameters studied were modified between survivors and non-survivors in the septic group. Results: Septic dogs had lower median segmented neutrophils count and NLR compared to SIRSdogs (p=0.02andp=0.04, respectively).Lastly,septicdogs hada higherprevalenceoftoxicneutrophilthanSIRSdogs(p=0.01).Wefoundthatfora1-unit increase of PLR and MLR, the risk of death increased by 50.5 and 60%, respectively. Conclusion and Clinical Importance: Evaluation of NLR at hospital admission may be a useful marker of inflammation, although it showed low sensitivity in differentiating SIRS and septic dogs. The monitoring of some CBC parameters, especially PLR and MLR may be useful in the establishment of prognosis in septic dogs
Emodialisi veterinaria nel cane: risultati del primo anno di attività del Centro di Emodialisi e Purificazione Ematica Veterinaria (CEPEV) dell'Università di Pisa
No full textIntroduzione e Scopo del lavoro - Le terapie
sostitutive renali extracorporee e le tecniche
di purificazione ematica costituiscono una
realtà in continua espansione nel panorama veterinario
mondiale. L’emodialisi, infatti, rappresenta
spesso l’unica chance terapeutica per pazienti
in insufficienza renale acuta, iperkaliemia
e sovraccarico di fluidi. Lo scopo del presente
lavoro è stato di valutare l’attività clinica del
primo Centro universitario italiano di Emodialisi
e Purificazione Ematica Veterinaria (CEPEV)
ad un anno dall’apertura, in termini di numero
di pazienti ricevuti, diagnosi, tipologia di trattamento
ricevuto, numero di interventi per pazienti
e mortalità intra ed inter-trattamento.
Materiali e metodi - Il presente studio ha
preso in considerazione tutti i pazienti pervenuti
presso il CEPEV per terapia renale sostitutiva
extracorporea in dodici mesi di attività.
Risultati - Il 71,43% dei pazienti presentava
AKI mentre il 28,57% AKI/CKD. La percentuale
complessiva di sopravvivenza è risultata pari
al 68,18%, con un valore del 83,84% in AKI e
del 66,67% in AKI/CKD. La condizione di AKI
risultava secondaria a tossicosi nel 38,09%, ad
infezione nel 33,33%, ad ostruzione delle vie
urinarie nel 9,52%, ad amiloidosi nel 4,76% e ad
eziologia sconosciuta nel 14,30%.
Discussione - L’elevata percentuale di sopravvivenza
sembra indicare il trattamento emodialitico
intermittente quale efficace strumento
terapeutico non solo del soggetto affetto da
danno renale acuto ma anche del paziente con
malattia renale cronica scompensata
Contrast enhancement ultrasonography (CEUS) of renal perfusion in dogs with acute kidney injury (AKI)
No full textAcute kidney injury (AKI) is due to a sudden decrease in renal function. Given the close correlation between the changes in renal microperfusion and renal function, we suggested an ultrasonography study of renal perfusion with CEUS in dogs with AKI, before being subjected to dialysis therapy. The present study aims to investigate whether ultrasound with contrast represents a sensitive diagnostic survey for the study of renal perfusion changes
A limited sampling, simple and useful method for determination of glomerular filtration rate in cats by using a new accurate HPLC method to measure iohexol plasmatic concentrations
Full text linkGlomerular filtration rate (GFR) is still a highly underutilized tool in cats because available methods are not easy to be performed in clinical practice. Iohexol (IOX) has been shown to be a useful and reliable marker of GFR both in animals and in humans. The aim of the present study was to develop a rapid and reliable method for measuring IOX in feline plasma and to evaluate the accuracy of limited sampling models to establish a low-cost and clinically suitable GFR test. IOX concentrations were determined by using a new HPLC-UV method. GFR was assessed as plasma clearance of IOX, which was calculated by dividing dose administered by area under the curve of plasmatic concentration versus time (AUC), and indexed to body weight (BW). Correlation and agreement analysis between the GFR values obtained by a seven-point clearance method and the GFR values determined by the application of simplified sample combinations indicated that the 3-blood sample clearance model (5, 30, and 60 min) was the best simplified method because it provided an accurate GFR value in only one hour. The reported method is a simple and accurate way of GFR determination, which may be easily used in a clinical setting
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