1,720,979 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
DIETETIC AND TOXICOLOGICAL PARAMETERS EVALUATION IN AONYX CINEREUS
No full textAonyx cinereus is the smallest otter existing, listed as Vulnerable under IUCN red list. Data on diet and nutritional intake of this species in the wild are scarce. Despite this, one of the most important parameters in the management of Aonyx cinereus in captivity, is the development of an appropriate diet program. The diet should meet nutritional needs of animals, guarantee an adequate intake of essential trace elements and be free from non-essential metals that could induce harmful effects. The three subjects included in this study arrived to Maitine Zoo few months ago and are the first specimens hosted in the park. For those reasons, we collected samples of food and faces of otters on weekly basis for 7 weeks, evaluating protein, lipidic and caloric content of the daily food rations of the animals. Moreover, we analysed concentration of trace elements in food and faeces, to define if the diet is balanced and safe and to acquire information about the metabolic processes of clawed otters. This study provides scientific data on Aonyx cinereus nutritional needs, metabolism and possible exposure to detrimental contaminants, giving useful information to implement the welfare and the health status of clawed otters under human care
FAECAL EVALUATION OF PDG IN A FEMALE OKAPI (Okapia Johnstoni) TO DEFINE OESTRUS CYCLE AND FERTILE WINDOW FOR REPRODUCTION PROGRAM OF CONSERVATION
No full textFAECAL EVALUATION OF PDG IN A FEMALE OKAPI (NOME SCIENTIFICO) TO DEFINE OESTRUS CYCLE AND FERTILE WINDOW FOR REPRODUCTION PROGRAM OF CONSERVATION
Rebecca Andreini1,3, Annalisa Zaccaroni1, Renato-Piccinini,2 Giuseppe Piscopo3,4
1 DIMEVET Bologna University 2 Parco Zoo Falconara Marittima 3 Delfini Bizantini Research Association 4 Veterinary Medicine Naples University
The okapi (Okapia Johnstoni) number is declining rapidly in their native habitat and the species is listed as endangered in the IUCN red list. To increase conservation efforts and to improve the welfare of okapis under human care, the evaluation of endocrine profile is an essential part of the scientific research. The need to use a non-invasive matrix for the endocrine analysis in wild life species is linked to the difficulty in obtaining blood samples and to the necessity to not stress the animals with restraining and medical procedure that could affect their welfare. This study aims to evaluate the faecal concentration of pregnanediol-3-glucoronide (PDG) in faeces of a young female hosted in Falconara Marittima zoo, Italy. Faeces have been collected twice a week, immediately after the emission, by zoo staff from March to April 2019. Samples have been labelled and stored at – 20 °C till analysis. For hormones extraction 200 μg of faeces have been weighted and added with 2 ml of ethanol, vortexed at 100 rpm for 60 minutes, centrifuged at 2500 rpm for 20 minutes and dried. For PDG detection an ELISA kit has been used, following test procedure. As far as we know few information are available regarding oestrous cycle and reproduction of the okapi, so a comparison of our results with bibliographic data was difficult. Despite this, we analysed our results in order to define the different phases of the oestrous cycle and to estimate their length with the goal to identify the fertile window of the subject. The results will allow scientists to have a further knowledge of the physiology of this species and will represent an essential step to define best strategies for the management of the subjects under human care and to establish programmes to strengthen the effort in assisted reproduction
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
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