1,720,988 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
Trends in fishery resource utilisation on the Great Fish Estuary
Full text linkPotts, W.M., Cowley, P.D., Corroyer, B. & Næsje, T.F. 2005. Trends in fishery resource utilisation on the Great Fish Estuary. - NINA Report 50. 34pp.
The Great Fish Estuary, located in the Eastern Cape Province, is becoming an increasingly popular fishing venue. A resource utilisation study consisting of a series of roving creel interview surveys was conducted in the estuary between March 200 I and February 2002 and between October 2003 and September 2004. During interviews with resource users, demographic informat ion as well as catch, effort, bait, duration of the fishing trip and number of rods/lines were obtained. Recreational shore fishers dominat ed during both study periods (54 %, both periods), followed by subsistence fishers (40 % - 1st st udy period, 23 % - 2nd study period) and recreat ional boat fishers (5 % - 1st study period, 23 % - 2nd st udy period). The increase in recreational boat fishers between the two study periods, was most probably attributed to the increased sampling on weekend days during the second study period and to the improved infrastructure at the Fish River Diner Caravan Park. Spotted grunter (Pomadasys commersonnii) and dusky kob (Argyrosomus japonicus) dominated the catches during both st udy periods. The overall catch per unit effort was lower during the second (0.19 fish/angler-hour) than during the first (0.22 fish/angler-hour) study period, while the distribution of fishing effort was more widespread during the second study period than in the fi rst . The total fishing effort during the second study period was twice as high (122 044 hrs), while the total catch was only o ne third higher (18 978 fish) than in the first study period (60 436 hrs and 12 752 fish, respectively). Results from the two study periods were used to make recommendations for the design of future estuarine fishery surveys. While the study showed a variety of short -term fluctuations, long term monitoring studies are recommended to examine trends in the Great Fish Estuary fisheries and other estuarine fisheries in South Africa.
Subsistence fishery, recreational fishery, bait fishery, datacollection protocols, managemen
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
Movements and area use by small spotted grunter (Pomadasys commersonnii) in the Great Fish Estuary (South Africa): implication for management
Full text linkNæsje, T.F., Childs, A.R., Cowley, P.D., Thorstad, E.B., Økland, F., Weerts, S., and Buthelezi, P. 2005. Movements and area use by small spotted grunter (Pomadasys commersonnii) in the Great Fish Estuary (South Africa): implication for management. - NINA Report 55. 46 pp.
Great Fish Estuary Programme: Behaviour and management of important estuarine fishery species A project within the South Africa / Norway Programme on Research Cooperation The aim of the programme is to investigate the movement behaviour, migrations and habitat use of important estuarine fishery species (spotted grunter and dusky kob) and local exploitation from fisheries to contribute to the development of a sustainable utilisation strategy. Background The utilisation of estuarine fish resources plays a major role in the local economy and food supply in many parts of South Africa. Many fish species that spend parts of their life in estuaries, such as the spotted grunter (Pomadasys commersonnii) and dusky kob (Argyrosomus japonicus), are exploited for both food (subsistence and small scale fisheries) and recreation. Such estuarine species may also form an important component of commercial coastal fisheries. Due to the poor status of many of the estuarine associated fish stocks, the sustainability of these fisheries is in question. It is therefore urgent to develop sound management practices based on adequate knowledge of the migratory behaviour, population biology, and habitat use of the targeted species. Project purpose The purpose of this project is to investigate the movement behaviour of two of South Africa’s most important estuarine fishery species, the spotted grunter and dusky kob, the exploitation of these species in estuaries and its implications for management. The movements and activity patterns of the spotted grunter and dusky kob are recorded by making use of acoustic telemetry methods, while the fisheries data are collected using structured visual surveys and on-sight direct contact roving creel (interview) surveys. Results from the project will contribute significantly to ensure sustainable utilization of these heavily targeted species. movement behaviour, Pomadasys commersonnii, area use, fisheries, managementpublishedVersio
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
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