1,720,963 research outputs found
Quantitative study of benthic fauna in a Humboldt Bay salt marsh
Get PDFMy thesis is an inventory of invertebrate species found in the low region of a Humboldt Bay salt marsh during four seasons, from July 1999 to April 2000. Invertebrates are an integral part of the salt marsh, contributing to detritus breakdown and food web support. There is insufficient documentation of salt marsh invertebrates in many parts of the world, including the Pacific North American coast. I found indigenous species that were previously known from Humboldt Bay, including Streblospio benedicti, and Assiminea californica. One introduced species of amphipod, Paracorophium sp., was found that is a new arrival to the Pacific Coast. The amphipod Hyale anceps was expected to occur in Humboldt Bay but had not previously been reported. The most abundant taxon was the polychaete family Sabellidae, at 1,968 worms from 10 samples; the least abundant was one Ovatella myosotis snail. Species diversity and evenness varied moderately from sample to sample, indicating the need for repeated sampling in future studies. The sampling method I used, with core diameter 8.5 cm and a sample depth of 2 cm, is a working technique for future salt marsh benthic studies to improve upon. The 0.5 mm mesh size was effective in retaining organisms. The "abundance" samples were randomly chosen and used a consistent sampling technique with the corer. This method collected both macrofauna and meiofauna. The "diversity" samples used a searching technique where field assistants sampled as many benthic macrofauna species as possible. This second method collected several species, such as Armadilloniscus coronocapitalis, that were not found in the abundance samples.Thesis (M.A.)--Humboldt State University, Biological Sciences, 200
Quantitative study of benthic fauna in a Humboldt Bay salt marsh
No full textMy thesis is an inventory of invertebrate species found in the low region of a Humboldt Bay salt marsh during four seasons, from July 1999 to April 2000. Invertebrates are an integral part of the salt marsh, contributing to detritus breakdown and food web support. There is insufficient documentation of salt marsh invertebrates in many parts of the world, including the Pacific North American coast. I found indigenous species that were previously known from Humboldt Bay, including Streblospio benedicti, and Assiminea californica. One introduced species of amphipod, Paracorophium sp., was found that is a new arrival to the Pacific Coast. The amphipod Hyale anceps was expected to occur in Humboldt Bay but had not previously been reported. The most abundant taxon was the polychaete family Sabellidae, at 1,968 worms from 10 samples; the least abundant was one Ovatella myosotis snail. Species diversity and evenness varied moderately from sample to sample, indicating the need for repeated sampling in future studies. The sampling method I used, with core diameter 8.5 cm and a sample depth of 2 cm, is a working technique for future salt marsh benthic studies to improve upon. The 0.5 mm mesh size was effective in retaining organisms. The abundance samples were randomly chosen and used a consistent sampling technique with the corer. This method collected both macrofauna and meiofauna. The diversity samples used a searching technique where field assistants sampled as many benthic macrofauna species as possible. This second method collected several species, such as Armadilloniscus coronocapitalis, that were not found in the abundance samples
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
