1,720,969 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
Exopolysaccharides Modify Functional Properties of Whey Protein Concentrate
No full textThe objectives of this research were to produce whey protein concentrate (WPC) with modified functionality using exopolysaccharides (BPS) producing cultures and utilize modified WPC to replace egg whites in cake. Two different BPS-producing cultures, Lactococcus lactis ssp. cremoris (JFR) and Streptococcus thermophilus (DP), producing BPS 1 and BPS2 respectively, were used in this study. One BPS-nonproducing commercial cheese culture (DYS 850) was used as control. Whey powder was utilized in this study to eliminate variations from fresh whey. Cultures grown overnight in reconstituted WPC (10 % w/w) were added directly or after overnight cooling (cooled BPS), at 2 % to reconstituted whey (6 % w/w). This gave a level of BPS similar to that found in whey from cheese made with BPS-producing cultures. Whey was then HTST pasteurized at 75 °C for 35 sec and ultrafiltered five times. Ultrafiltered whey (retentate) was spray dried at inlet and outlet air temperatures of 200 °C and 90 °C respectively to obtain WPC. In general the protein solubility of all WPC was higher at pH 7 than at pH 3. Whey protein concentrate containing BPS2 without cooling, WPC containing cooled BPS 1 and WPC containing cooled BPS2 exhibited higher protein solubility (p \u3c 0. 05) as compared to WPC containing no EPS. Also, WPC containing EPS showed lower protein denaturation (p \u3c 0. 05) than that with no E~S. Emulsifying ability of WPC containing EPS was higher (p \u3c 0. 05) than that in control. Addition of EPS to WPC significantly enhanced (p \u3c 0. 05) its· gelling ability. Foam overrun and hydrophobicity of WPC were not affected by addition of EPS. Different types of EPS used in this study modified WPC functionality to varying extents. Functionality of the WPC powders produced was tested in cake making. Control cakes were prepared using egg white powder. Specific gravity ahd viscosity of cake batter did not change when one third of the egg whites powder was replaced with WPC containing EPS. Higher levels of replacement with WPC deteriorated cake batter quality. In conclusion, data obtained from this study shows that EPS modifies WPC functionality. The extent of modification depends upon the type of EPS. Cooling of the fermentate containing EPS prior to its addition to whey further improved the functional properties of the resulting WPC. Further studies will be directed towards understanding the effect of EPS structure and their interaction with whey protein on WPC functionality
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
Biomedical Image Indexing and Retrieval Descriptors: A Comparative Study
No full textAbstractThis paper focuses on the comparison of two new proposed pattern descriptors i.e., local mesh ternary pattern (LMeTerP) and directional local ternary quantized extrema pattern (DLTerQEP) for biomedical image indexing and retrieval. The standard local binary patterns (LBP) and local ternary patterns (LTP) encode the gray scale relationship between the center pixel and its surrounding neighbors in two dimensional (2D) local region of an image whereas the former descriptor encodes the gray scale relationship among the neighbors for a given center pixel with three selected directions of mess patterns which is generated from 2D image and later descriptor encodes the spatial relation between any pair of neighbors in a local region along the given directions (i.e., 0̊, 45̊, 90̊ and 135̊) for a given center pixel in an image. The novelty of the proposed descriptors is that they use ternary patterns from images to encode more spatial structure information which lead to better retrieval. The experimental results demonstrate the superiority of the new techniques in terms of average retrieval precision (ARP) and average retrieval rate (ARR) over state-of-the-art feature extraction techniques (like LBP, LTP, LQEP, LMeP etc.) on three different types of benchmark biomedical databases
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
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