1,720,957 research outputs found
Character analysis of adaptations for tarsal pollen collection in the Bombyliidae (Insecta: Diptera): the benefits of putting your foot in your mouth
No full textNeff, John L., Simpson, Beryl B., Evenhuis, Neal L., Dieringer, Gregg (2003): Character analysis of adaptations for tarsal pollen collection in the Bombyliidae (Insecta: Diptera): the benefits of putting your foot in your mouth. Zootaxa 157: 1-14, DOI: 10.11646/zootaxa.157.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.157.1.
FIGURES 2–6 in Character analysis of adaptations for tarsal pollen collection in the Bombyliidae (Insecta: Diptera): the benefits of putting your foot in your mouth
No full textFIGURES 2–6. Female tarsal setae of Bombyliidae. 2. Neodiplocampta paradoxa, foretarsus with capitate setae, 231 x. 3. Dipalta serpentina, apex of foretarsal capitate seta, 800 x. 4. Dipalta serpentina, foretarsal capitate setae plus microtrichia, 800 x. 5. Neodiplocampta paradoxa, foretarsus plus apex of tibia, 63 x. 6. Bombylius major, tarsomere 5 and pretarsus of foreleg with lanceolate setae, 370 x.Published as part of Neff, John L., Simpson, Beryl B., Evenhuis, Neal L. & Dieringer, Gregg, 2003, Character analysis of adaptations for tarsal pollen collection in the Bombyliidae (Insecta: Diptera): the benefits of putting your foot in your mouth, pp. 1-14 in Zootaxa 157 on page 7, DOI: 10.11646/zootaxa.157.1.1, http://zenodo.org/record/509343
FIGURES 7–12 in Character analysis of adaptations for tarsal pollen collection in the Bombyliidae (Insecta: Diptera): the benefits of putting your foot in your mouth
No full textFIGURES 7–12. Female tarsal setae of Bombyliidae. 7. Poecilognathus sulphureus, spatulate setae, 2000 x. 8. P. sulphureus, lateral view tarsomeres 3, 4, and 5 with microtrichia, normal setae and apicoventral spatulate setae, 300 x. 9. Hemipenthes jaennickeana, apex foretarsal spatulate setae, 2660 x. 10. Exoprosopa eremita, distal tarsomeres and pretarsus with weakly spatulate setae, 270 x. 11. H. jaennickeana, foretarsal spatulate setae plus microtrichia, 990 x. 12. P. lucifer, lateral view of foretarsomere 2 with elongate, weakly clavate setae, 160 x.Published as part of Neff, John L., Simpson, Beryl B., Evenhuis, Neal L. & Dieringer, Gregg, 2003, Character analysis of adaptations for tarsal pollen collection in the Bombyliidae (Insecta: Diptera): the benefits of putting your foot in your mouth, pp. 1-14 in Zootaxa 157 on page 8, DOI: 10.11646/zootaxa.157.1.1, http://zenodo.org/record/509343
The Pollination Ecology of Orchis Spectabilis L. (Orchidaceae)
Get PDFAuthor Institution: Department of Biology, University of AkronThree woodland sites were selected for collecting data on the frequency of pollination of Orchis spectabilis by bumblebees in northeast Ohio. A total of 82 hours was spent at 2 of these sites, which were chosen for observing the foraging o£ Bombus queens on spring ephemerals. The effect of Aesculus glabra, Dicentra canadensis, Geranium maculatum, Iris pseudacorus, and Pedicularis canadensis in attracting bumblebees in relation to 0. spectabilis pollination was also studied. Of the 123 bumblebees captured, 74% foraged on flowers and 26% hunted for nesting sites. Caging experiments on 0. spectabilis indicated 4% self-compatibility and 100% outcrossing fertility and suggested a required animal pollen vector. In the two populations studied, 17-21% of the plants flowered while fruit production ranged 0—11%. Seed production measured by two methods averaged 3485 seeds/fruit and 6656 seeds/fruit, respectively. Both methods indicated more than adequate seed set to replace the existing populations even if only one fruit/season was produced. 0. spectabilis is a woodland plant species relying on chance visits by either woodlandor meadow-dwelling Bombus queens for pollination. The limited occurrence of this plant species in northeast Ohio has not been attributed to the low pollinator frequency it receives
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
- …
