1,720,999 research outputs found
Separazione e dosaggio di zuccheri nei mieli per GC-capillare dopo reazione con metossiammina e silanizzazione
No full textAndamento meteorologico e stato nutrizionale dei meleti e vigneti trentini: analisi dei dati del decennio 1987-1996
No full textInvestigation of compost-mulch in the vineyards of Trentino: effects on the soil and culture
No full text
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 the differences among samples from agricultural trials analyzed by routine procedures experimental or only analytical?
No full textMany experimental researches in the agricultural field involve chemical analyses. For a correct statistical data processing, it should be important to discriminate between the variability induced by the analytical method and by other sources of variation (experimental treatments and other causes of systematic variability). The object of the present communication is to present a simple and economical method for the evaluation of the analytical variability which does not require to replicate the analysis of each sample. The analytical method used in this study was the plant tissue determination of phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), manganese (Mn), boron (B), copper (Cu), zinc (Zn), and sulfur (S) by plasma emission spectrometry (ICP). The repeatability and the reproducibility of the method for each element was obtained by analysing two times per day a reference sample. The use of these parameters in the statistical processing of the analytical data from experimental trials for a correct result interpretation are discussed
Ruolo degli antigeni fungini nella diagnosi delle micosi invasive in terapia intensiva
No full textAssumendo per il beta-D-glucano un cut-off di 80 pg/mL abbiamo ottenuto i seguenti risultati: sensibilità 78.0%, specificità 69.2%, RR 2.68 (IC 95%, 1.52 – 4.71) e OR 4.54 (IC 95%, 2.21 – 9.32). Analizzando la curva ROC, il cut-off migliore è stato pari a 179 pg/mL (sensibilità 64.0%, specificità 92.3%). Per quanto riguarda il galattomannano, il cut-off di 0.5 ng/mL ha riportato: sensibilità 45.0%, specificità 89.1%, RR 3.06 (IC 95%, 2.23 – 4.19) e OR 5.03 (IC 95%, 3.10 – 8.18). Analizzando la curva ROC, si è confermato ottimale il valore di cut-off utilizzato. Per quanto riguarda i fattori confondenti presi in considerazione, nessuno è risultato essere statisticamente significativo.
Conclusioni. Il dosaggio degli antigeni è risultato utile per la diagnosi precoce delle micosi invasive nella nostra UTI, nonostante sia difficile ottenere dei valori di specificità e sensibilità elevati a causa della eterogeneità dei pazienti e delle loro comorbilità
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