1,720,959 research outputs found
Scheduling of flexible configuration aircraft: strategic opportunities and operating policies
No full text
labeling, identification and recognition of wine-relevant odorants in expert sommeliers, intermediates and untrained wine drinkers.
No full textIn this study we examined the development of wine expertise. We asked four groupsö
untrained wine drinkers, second- and third-level trainee sommeliers, and professional somme-
liersöto engage in a range of olfactory tasks to assess perceptual and semantic aspects of
expertise. These tasks included identification, recognition, and description of a range of domain-
specific and common odour stimuli, including wines. Trainee sommeliers were significantly
poorer at identification of wine-relevant odours than untrained wine drinkers and professional
sommeliers. Trainee and professional sommeliers were, however, significantly better than untrained
wine drinkers in a delayed matching-to-sample wine-recognition task, but not in the case of other
odorous stimuli. The wine-description task demonstrated a degree of skill, in terms of specificity
and quantity of wine-relevant descriptors, as a function of expertise. These results, of one of the
first studies of examining wine expertise by a cross-sectional developmental approach, indicate
that perceptual aspects of expertise are probably rapidly acquired, being present even in the second-
and third-level trainees, while semantic expertise is slower to develop, and may incur time for the
identification of wine-specific odorants during training
LDPC codes based on serially concatenated multiple parity-check codes
No full textThis letter proposes a new class of serially concatenated
codes that can be viewed as Low-Density Parity-
Check (LDPC) codes. They are derived from Multiple Serially
Concatenated Single Parity-Check (M-SC-SPC) codes, but they
use different components, that we call Multiple Parity-Check
(MPC) codes. In comparison with M-SC-SPC codes, the new
scheme achieves better performance with similar complexity. The
proposed codes can represent an alternative to the well-known
family of Repeat Accumulate (RA) codes, being based on the
same principles
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
- …
