1,720,961 research outputs found
FIGURES 8–9 in New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae)
No full textFIGURES 8–9. Habitus of males: 8, Holotype of Ceratinella playa new species; 9, Erigone denticulata Chamberlin & Ivie. Scale bars = 0.25 mm.Published as part of Cokendolpher, James C., Torrence, Shannon M., Smith, Loren M. & Dupérré, Nadine, 2007, New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae), pp. 49-60 in Zootaxa 1529 on page 54, DOI: 10.5281/zenodo.17765
FIGURES 4–7 in New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae)
No full textFIGURES 4–7. Males: 4–6, Ceratinella playa new species, 4, anterior view of carapace and chelicera; 5, ventral view of pedicel to chelicera; 6, closeup view of anterior edge of dorsal scutum of abdomen; 7, Erigone denticulata Chamberlin & Ivie cephalothorax and appendages anteriolateral view; 7, Scale bars = 0.1 mm, except Fig. 6 = 0.05 mm.Published as part of Cokendolpher, James C., Torrence, Shannon M., Smith, Loren M. & Dupérré, Nadine, 2007, New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae), pp. 49-60 in Zootaxa 1529 on page 53, DOI: 10.5281/zenodo.17765
FIGURES 17–23 in New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae)
No full textFIGURES 17–23. Male and female Erigone denticulata Chamberlin & Ivie 1939 from playas in Briscoe County, Texas. 17, carapace of male; 18, pedipalpus of male, ventral view; 19, enlarged view of pedipalpal tibia of male, ventral view; 20, pedipalpal tibia of male, dorsal view; 21, epigynum, ventral view; 22, spermathecae, posterior view; 23, spermathecae, dorsal view. Abbreviations used: CD copulatory ducts, D patellar denticle, E embolus, FD fertilization ducts, PA patellar apophysis, PC paracymbium, SA suprategular apophysis, S spermatheca, TA tegular apophysis, TE tegulum, Terminology follows Hormiga (2000). Scale bars for figures 17, 18 = 0.25 mm, all other figures = 0.05 mm.Published as part of Cokendolpher, James C., Torrence, Shannon M., Smith, Loren M. & Dupérré, Nadine, 2007, New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae), pp. 49-60 in Zootaxa 1529 on page 58, DOI: 10.5281/zenodo.17765
Mermessus denticulatus Banks
No full textMermessus denticulatus (Banks) Tmeticus denticulatus Banks 1898, 243, pl. 14, fig. 29; see Platnick (2007) for further literature records. Centromerus denticulatus: Roewer 1942, 532. Erigone eschatologica Crosby in Chamberlin 1924, 643, figs 85–88. Eperigone eschatologica: Crosby & Bishop 1928, 51, figs 113–116; Millidge 1987, 37, figs 132–136; Platnick (2007). Mermessus denticulatus (Banks): Miller 2007, 132, fig. 92 (G, H). Material Examined.— U.S.A.: Texas: Floyd County: Mitchell East Playa, N 33 ° 58 ’ W 101 ° 29 ', 20 Sept. 1994, Jim Anderson (TTU-Z 13,377). Comments.—Although this spider was not collected in the present study in Briscoe and Swisher Counties, a male voucher from Anderson’s (1997) study of playas in Floyd County (the county immediately south of Briscoe County) revealed this species. This specimen was collected in the emergent vegetation in a playa. The new county record for this spider fills a blank in its recorded range. When Millidge (1987) revised the genus and updated the species description and distribution, he listed samples from Potter, Knox, and Lipscomb Counties from northwestern Texas, but did not provide specifics on the localities. Platnick (2007) listed the range of this species as U.S.A. to Colombia, introduced to Europe. The only natural history information provided by Millidge (1987) was that adults were collected from throughout the year and the only habitat mentioned was “crevices in a clay bank in Georgia.”Published as part of Cokendolpher, James C., Torrence, Shannon M., Smith, Loren M. & Dupérré, Nadine, 2007, New Linyphiidae spiders associated with playas in the Southern High Plains (Llano Estacado) of Texas (Arachnida: Araneae), pp. 49-60 in Zootaxa 1529 on page 56, DOI: 10.5281/zenodo.17765
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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