1,721,178 research outputs found
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
Studies on the coastal water quality in relation to the health of green mussel Perna viridis (Linnaeus)
Full text linkThe thesis presents an account on the physiological response of green
mussel, Perna viridis (Linnaeus) to the temporal and spatial variations in
the environmental parameters of the mussel beds. Condition index, a nonspecific
biomarker which integrates physiological responses of mussels to
multiple stressors is evaluated as the intrinsic response to the variable
environment. The cytological response in the mussels is also elucidated
with reference to the trace metal and organochlorine concentrations of the
shellfish waters. Baseline information on the sanitary quality of the
coastal waters and the extent of faecal contamination of the mussel beds
is also presented.
• The study area covers the mussel beds off Someshwara and Surathkal of
Dakshina Kannada District, Kamataka, where green mussel, P. viridis
contributes to a significant fishery of commercial importance.
• The variations in water temperature, salinity, dissolved oxygen (DO), pH
and the qualitative and quantitative variations in seston of the mussel beds
were studied to evaluate their temporal and site-specific differences
between the two mussel beds.
• With the onset of monsoon a sharp decline in the water temperature,
salinity and pH of the mussel beds was noticed. Bottom water
temperature at Someshwara mussel beds varied between 2S.20°C in
August and 31.1S0C in April. At Surathkal mussel beds, water
temperature ranged between 26. 10°C in August and 31.4SoC in May. The
mean water temperature of the mussel beds varied significantly (p<O.OS
Experimental and participatory Mussel farming activity in Karnataka
Full text linkCommercial mussel farming gained rapid strides since 1996 in India and in the recent years, the
farmed mussel production of the country crossed 18,432 t (2009). This leap in mussel production
was observed mainly in the State of Kerala, though efforts to popularize the technology were
undertaken in the States of Karnataka, Goa, Maharashtra and Tamil Nadu. Karnataka State is
endowed with several estuaries along its 300 km coastline that offers natural productive sheltered
environment suitable for the development of mariculture. Though shrimp farming practices are in
vogue in tidal areas along the coastal areas, presentIy many environmental issues impede its progress
in the region. The technology for farming filter-feeding bivalves in suspended farming facilities,
presented encouraging results at several coastal and estuarine areas of this State
Aggregation based Cuttlefish fishery
Full text linkCephalopods are actively sought in artisanal fisheries with highly selective gears and fishing techniques based on knowledge of their biology and behaviour (Reid et al., 2005). Such techniques use substrates for egg deposition or use live sexually mature females as lures for attracting males while targeting spawning cuttlefishes
Cuttlefish biology
Full text linkThe Class Cephalopoda comprising of squids, cuttlefishes and octopus includes the largest known living invertebrates within the animal Kingdom. Cephalopods have well developed head and a body consisting of a muscular mantle and mantle cavity. Head bears circumoral appendages (arms, tentacles), a feature that reflects the origin of the name ‘Cephalopoda’, which is derived from the union of the two Greek words: ‘kefale’, head, and ‘pous’, feet. These soft-bodied bilaterally symmetrical groups are commercially important fishery resources occurring in all marine habitats in depth ranging from intertidal to over 5,000 m. Salinity is considered as the limiting factor restricting their distribution between 27 and 37 psu, with few exceptions
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
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