1,720,957 research outputs found
Towards digital descriptions of all extant reptile species
No full textUetz, Peter, Darko, Yaa Adarkwa, Zeliff, Dustin (2023): Towards digital descriptions of all extant reptile species. Megataxa 10 (1): 27-42, DOI: 10.11646/megataxa.10.1.6, URL: https://www.mapress.com/mt/article/download/megataxa.10.1.6/5217
FIGURE 2 in Towards digital descriptions of all extant reptile species
No full textFIGURE 2. Number of species with descriptions and images in the Reptile Database (A) 4,206 species descriptions contain information about other species, so even though the latter species do not have a description, information about them may be derived from those species that do. (B) Coverage of species by descriptions and/or photos.Published as part of <i>Uetz, Peter, Darko, Yaa Adarkwa & Zeliff, Dustin, 2023, Towards digital descriptions of all extant reptile species, pp. 27-42 in Megataxa 10 (1)</i> on page 30, DOI: 10.11646/megataxa.10.1.6, <a href="http://zenodo.org/record/10149170">http://zenodo.org/record/10149170</a>
FIGURE 3. Currently available descriptions across different families. The 5 in Towards digital descriptions of all extant reptile species
No full textFIGURE 3. Currently available descriptions across different families. The 5 number columns show the number of species in each family (species), the number of species with descriptions or without (desc, no desc), the percentage of species with descriptions (percent), and the number of species without (left). The left bar chart shows the percentage of species with/out descriptions (blue/yellow). The right bar chart shows the absolute number of species with/out descriptions (blue/orange). Note that Iguanidae contains all 8 families now considered Iguanidae (s.l.), e.g. Opluridae etc. The Lamprophiidae (s.l.) also contain Atractaspididae, Psammophiidae, and Pseudoxyrhophiidae. Gymnophthalmidae (s.l.) contain Alopoglossidae and Anguidae (s.l.) contain Diploglossidae.Published as part of <i>Uetz, Peter, Darko, Yaa Adarkwa & Zeliff, Dustin, 2023, Towards digital descriptions of all extant reptile species, pp. 27-42 in Megataxa 10 (1)</i> on page 32, DOI: 10.11646/megataxa.10.1.6, <a href="http://zenodo.org/record/10149170">http://zenodo.org/record/10149170</a>
FIGURE 1 in Towards digital descriptions of all extant reptile species
No full textFIGURE 1 Species descriptions in the Reptile Database over time and ranked by information content. (A) Timeline over which descriptions have been added to the Reptile Database. (B) Descriptions ranked by "size". Each species with a description is shown as a vertical bar, with the hight indicating its size in characters (i.e., "bytes" or letters without spaces, Y axis). The X axis shows the ranked series of species. One example is shown in the insert, namely the description of Lampropeltis alterna. This description has 623 characters and is on the shorter end of the spectrum. The tail end of this graph shows ~700 species in which the description only consists of a reference, e.g., "Description: McDowell 1979: 51" (here: for Candoia aspera Ģnther 1877), hence they are very short.Published as part of <i>Uetz, Peter, Darko, Yaa Adarkwa & Zeliff, Dustin, 2023, Towards digital descriptions of all extant reptile species, pp. 27-42 in Megataxa 10 (1)</i> on page 29, DOI: 10.11646/megataxa.10.1.6, <a href="http://zenodo.org/record/10149170">http://zenodo.org/record/10149170</a>
Genomic comparison of DBA/2J and C57Bl/6J strains of Mus musculus and best practice of genome alignment for bioinformatics analyses
Full text linkAlcohol use disorder is known to have significant genetic components that contribute to an individual’s susceptibility to the disease. Mouse models are commonly used to study the mechanisms underlying alcohol use disorder, with C57BL/6J (B6) and DBA/2J (D2) being two of the more prominently used inbred strains. Research in the Miles Laboratory has used these two strains, and genetic panels of mice derived from them, to identify potential genes associated with variance in ethanol-related behaviors using quantitative trait loci (QTL) analysis. For example, Ninein (Nin) was identified as a potential candidate gene for the anxiolytic effects of ethanol, discovered because it resides in the confidence interval for a QTL and shows mRNA expression differences between B6 and D2 mice. This differential expression was identified using counts of RNA-Seq reads that have been aligned to a reference genome, specifically the B6 reference genome. Due to the known genetic differences between the two strains, it is possible that the D2 samples could benefit from being aligned to a D2 genome instead of the B6. This would lead to better results overall due to improved read alignment and identification of novel splicing events that might be seen in D2 mice. To test this hypothesis, a dataset consisting of deep (150 million reads) sequencing of RNA from nucleus accumbens of both B6 and D2 mice was used for multiple bioinformatics analyses (differential expression, gene ontology, semantic similarity, differential exon utilization, splice site location, and alternative splicing) with both B6 aligned D2 counts and D2 aligned D2 counts. End results of each analysis were then compared for significant differences in outcomes. The results of this analysis show that when aligning D2 samples to the D2 genome a majority of differentially expressed genes and differentially utilized exons are retained from the B6 aligned analysis while many new genes and exons are identified that are unique to the D2 aligned analysis
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
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