1,721,266 research outputs found
New genus and subgenus of South American long-horned bees (Apidae, Eucerini)
No full textFreitas, Felipe V. (2022): New genus and subgenus of South American long-horned bees (Apidae, Eucerini). Zootaxa 5196 (4): 595-600, DOI: https://doi.org/10.11646/zootaxa.5196.4.
FIGURE 2 in New genus and subgenus of South American long-horned bees (Apidae, Eucerini)
No full textFIGURE 2. Savannychapis interrupta (Urban 1989): Female (Paratypus) in a) lateral and b) frontal views; specimen from Bahia, Brazil. Male in d) dorsal and e) frontal views; specimen from Mato Grosso, Brazil. g) detail of the three-segmented maxillary palpi, and h) sterna of male, to highlight the structure of S6 with two apicolateral carinae, not converging near the midline, and with basolateral depressions. Both specimens were studied by Dr. Danuncia Urban (DZUP) and used to confirm the identity of the vouchers included in the phylogenetic study subsidizing the proposal of the new genus. Scale bars = 2 mm.Published as part of Freitas, Felipe V., 2022, New genus and subgenus of South American long-horned bees (Apidae, Eucerini), pp. 595-600 in Zootaxa 5196 (4) on page 598, DOI: 10.11646/zootaxa.5196.4.8, http://zenodo.org/record/723582
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
FIGURE 3 in Tadpole buccal secretory glands as new support for a Neotropical clade of frogs
No full textFIGURE 3. Buccal epithelium of a tadpole of a species of Leptodactylus of the L. marmoratus group) (former Adenomera) stained with Periodic Acid Schiff. Main frame: the arrows point to secretory ridges on the ventral surface of the ventral velum. Inset: secretory pits at the posterior edge of the buccal roof.Published as part of Giaretta, Ariovaldo A., Freitas, Felipe G., Antoniazzi, Marta M. & Jared, Carlos, 2011, Tadpole buccal secretory glands as new support for a Neotropical clade of frogs, pp. 38-44 in Zootaxa 3011 (1) on page 41, DOI: 10.11646/zootaxa.3011.1.4, http://zenodo.org/record/528077
FIGURE 2 in Tadpole buccal secretory glands as new support for a Neotropical clade of frogs
No full textFIGURE 2. Buccal epithelium of a tadpole of L. labyrinthicus stained with Periodic Acid Schiff. Main frame: the arrows point to secretory ridges on the ventral surface of the ventral velum. Inset: secretory pits at the posterior edge of the buccal roof.Published as part of Giaretta, Ariovaldo A., Freitas, Felipe G., Antoniazzi, Marta M. & Jared, Carlos, 2011, Tadpole buccal secretory glands as new support for a Neotropical clade of frogs, pp. 38-44 in Zootaxa 3011 (1) on page 41, DOI: 10.11646/zootaxa.3011.1.4, http://zenodo.org/record/528077
FIGURE 4. T in Synopsis of the bee genus Thygater Holmberg 1884 (Hymenoptera, Apidae) in the Brazilian state of Minas Gerais, with the description of a new species and a key to all Brazilian species
No full textFIGURE 4. T. anae—♀: A—frontal view, B—lateral view, C—dorsal view (DZUP Santa Tereza—ES, Brasil, 8/11/1967, C.T. & C. Elias lg, Paratype); ♂: D—frontal view, E—lateral view, F—dorsal view (UFMG 1200097). Scale bar = 1mm.Published as part of Freitas, Felipe V. & Silveira, Fernando A., 2017, Synopsis of the bee genus Thygater Holmberg 1884 (Hymenoptera, Apidae) in the Brazilian state of Minas Gerais, with the description of a new species and a key to all Brazilian species, pp. 1-29 in Zootaxa 4238 (1) on page 9, DOI: 10.11646/zootaxa.4238.1.1, http://zenodo.org/record/34498
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
Savannychapis Freitas 2022, New genus
No full textSavannychapis Freitas New genus Type species: Gaesischia interrupta Urban 1989c [p. 90] Diagnosis: The genus Savannychapis is easily recognizable among the remaining Neotropical genera closely related to Gaesischia (Dasyhalonia Michener, LaBerge and Moure, Florilegus Robertson, Gaesochira Moure and Michener, Hamatothrix Urban, Micronychapis Moure and Michener, Pachysvastra Moure and Michener, Platysvastra Moure, Santiago Urban, and Svastrina Moure and Michener) by (i) the maxillary palpi with three palpomeres (Fig. 2-e); by the (ii) sixth sternum of males with a posterolateral carinae on each side of the median line, approaching, but neither attaining the apex of the sternum nor each other near the median line (Fig. 2-f); (iii) T6 without lateral parts elevated or forming tooths. Among Neotropical Eucerini, the only other genus with the combination of three or fewer palpomeres and carinae on S 6 in some of its species is Melissoptila Holmberg; however, the presence of elevations or tooths on the laterals parts of T6 is a diagnostic character for that genus together to the number of maxillary palpomeres, while Savannychapis lacks elevations on lateral parts of T6. Etymology: The name is a free combination of savanna in reference to the Cerrado (Brazilian savanna), where the type species seems to be endemic, plus the suffix - nychapis regarding its sister genus Micronychapis. Included species: Savannychapis interrupta (Urban 1989) comb. n. Distribution: This species seems to have a broad distribution in the domain of Cerrado (Brazilian savanna), with records in the Brazilian states of Bahia, Mato Grosso, and Minas Gerais.Published as part of Freitas, Felipe V., 2022, New genus and subgenus of South American long-horned bees (Apidae, Eucerini), pp. 595-600 in Zootaxa 5196 (4) on pages 596-597, DOI: 10.11646/zootaxa.5196.4.8, http://zenodo.org/record/723582
- …
