1,722,517 research outputs found
Edgeworth Expansions and Jackknife Methods
Full text link1 online resource (PDF, 22 pages)Hinkley, David; Bo-Cheng, Wei. (1982). Edgeworth Expansions and Jackknife Methods. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/199412
Geometrical Method of Asymptotic Conditional Inference Based on the Subset Parameters
Full text link1 online resource (PDF, 24 pages)Wei, Bo-Cheng; Tsai, Chih-Ling. (1983). Geometrical Method of Asymptotic Conditional Inference Based on the Subset Parameters. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/199424
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
Compression after impact behavior of flat and tapered Single-Double carbon composite specimens
Full text linkThis research investigates the damage tolerance with compression after impact (CAI) testing procedure of five sets of specimens, that were manufactured using the card-sliding technique with non-crimp fabrics (NCFs) and adopting a Single-Double (SD) stacking sequence. Before undergoing CAI tests, initial damage was generated in the specimens with low-velocity impacts. Two sets of specimens are flat with a constant cross-section and they are manufactured with ±45° and ±30° NCFs, respectively. Two sets feature a tapered cross-section and the same NCFs as the flat ones, and the fifth set consists of tapered specimens with the same fiber orientation as one of the tapered sets but feature NCFs with different areal density. The CAI tests were performed according to the ASTM standard, using an infra-red camera and a digital image correlation system to record the thermal transient and the displacement of the specimens. Finite Element Analyses are validated and compared with the experimental results. The failure modes are discussed focusing on the various damage mechanisms, highlighting the effect of the tapered cross-section, the different NCFs, and the stacking sequence. This research provided insights on NCFs composite damage tolerance after low-velocity impact damage, highlighting the effect of adopting the novel SD stacking sequence and card-sliding method to taper the laminate. The analysis underscores the possibility to develop composites mitigating delamination risks and promoting intra-laminar damage
The neural correlates of attention orienting in visuospatial working memory for detecting feature and conjunction changes
No full text
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
- …
