1,720,998 research outputs found
Description of two new species of ostracods from the Strait of Messina (central Mediterranean)
No full textMore than 100 years after the studies of G. Seguenza, sediment samples from the Strait of Messina (central Mediterranean) were examined in order to study
their ostracod faunas. Two new species, Anchistrocheles seguenzai n. sp. and Phlyctocythere sicula n. sp., were found, both in thanatocoenoses from the Bathyal
zone, at a depth of 545 m. Anchistrocheles seguenzai n. sp. is distinguishable from A. tenera (Breman, 1975), the only living species of the genus in Recent Mediterranean, and from the other species of the genus because of the more
reniform-subquadrangular outline of its carapace and the different height/length ratio values. In the same way, Phlyctocythere sicula n. sp. can be distinguished from P. pellucida (Müller, 1894) the only living species of the genus in Recent Mediterranean, because of its more rounded outline, less marked caudal process which is more obtuse and more shifted to the median side of the posterior end, the inflated postero-ventral area, the more acute anterior margin and the narrower marginal zone and vestibula. The stratigraphic and geographic distribution of some species of both genera is indicated
Shallow water ostracods near the Mae Khlong river mouth (NW Gulf of Thailand
No full textThe study of the ostracod fauna of shallow marine environments strongly influenced by human activity off the Mae Khlong river mouth (NW Gulf of Thailand, north of1-1/2eiehaburd allows the identification of34 species, belonging to thanatocoenosis and, subordinately, to biocoenosis. The relationships between ostracods and water depth and substrate are discussed in order to identifif species which are tolerant of the changes in these environmental parameters. °strewed distributions are also related to salinity pH and dissolved oxygen. Moreover; using the Shannon Weaver index as a measure of ecosystem health, it has been possible to highlight the deterioration of environmental conditions at the investigated sampling stations and to identify the species which are tolerant of human-induced environmental changes
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
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
Environmental monitoring through the shallow marine ostracods of Phetchaburi area (MW Gulf of Thailand)
No full textThe study of ostracod fauna of the coastal area near Phetchaburi allows the iden¬tification of 38 species. Taking into account the data of some environmental factors, it has been pos¬sible to recognize some ostracod groups which indicate relationships with depth and substrate. The application of Shannon Weaver (H') index demonstrates that the best conditions of species richness and equitability and, then, equitable environmental conditions are present in the central-southern sector of the investigated area. Conversely, stressing conditions occur in the northern sector in front of the Mae Khlong river mouth, which drains seaward pollutants and nutrients.
The sampling stations are included by us in categories corresponding to H' values. Except for those without ostracods (category 1 with H' not calculated), the sampling stations characterize other four categories. It is assumed by us that the environmental conditions improve from 1 to 5 category. When present, the ostracod species evidence in these categories some observations concerning their high or reduced capability to tolerate the variations of the environmental conditions. Species occurring in several categories are more tolerant than those present in a reduced number of categories. The for¬mer species can be labeled as opportunistic; the latter species can be considered "in equilibrium", or less opportunistic, at least. Thus, this work evidences that the ostracods can be good markers of the environmental variability, so becoming useful tools for the monitoring of a coastal area showing par¬ticular conditions linked to strong river influence and human activit
- …
