1,720,964 research outputs found
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
Heavy metal pollution of aquatic systems in oil producing communities of delta state, Nigeria
Get PDFObjective: This study was designed to determine the heavy metal pollution status of some rivers and creeks within oil producing communities in Delta state of Nigeria.Methodology and Results: Water and fish samples were collected from six Rivers in Delta state viz: Egbokodo River in Warri, River Ethiope in Sapele, Urie River in Igbide Isoko, Asaba-Ase creek, Aragba River in Abraka, and Uzere Creek. Water fresh, and ready to eat fish samples were analyzed for heavy metals (lead, cadmium, manganese, copper, iron and nickel) levels. Most heavy metals were marginally below the residual level recommended by the World health organisation (WHO) and Federal Environmental Protection Agency (FEPA). Iron cadmium and Nickel were detected in all samples irrespective of the site of collection. Nickel exceeded the WHO standard limit (0.6) in fresh fish samples from Aragba (0.89) and Asaba-Ase (0.7), while fresh fish sample from Ethiope river had marginally higher Manganese concentrations (0.57) than recommended by WHO (0.5)Conclusion and application of results: Fish from each of these rivers were marginally safe in their concentration of the studied metals. Caution and constant monitoring to prevent increased concentration and to the aquatic fauna and resultant toxicity to human consumers through the trophic web is important. Further investigation and routine monitoring will enable optimal recommendations and policies for surface water and fauna monitoring of the Niger Delta region in Nigeria.Keywords: Heavy metals; Pollution; fish; Delta state; Nigeri
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Haematologic and Biochemical Parameters of Haemogregarine-infected and Non-infected African Hinge-Back Tortoises in Ibadan, Nigeria
No full textThis study was conducted to evaluate haematological and biochemical parameters of haemogregarine-infected (h-infected) andnon-infected African hinge-back tortoises in Ibadan, Nigeria. Blood samples were collected from 120 tortoises, of which 70 were Kinixys belliana and 50 were K. homeana. Stained thin smears were examined for haemogregarines using light microscope. Haematological and biochemical analyses were carried out following standard procedures. A total of 91(75.83 %) tortoises were positive for haemogregarines. Significantly (P<0.05) lower values of haematocrit (23.92 %), haemoglobin (5.21g/dl) and mean corpuscular haemoglobin concentration (MCHC) (21.78 %) were recorded for h-infected tortoises with haematocrit (33.29 %), haemoglobin (8.31g/dl) and MCHC (24.96 %). Higher values of white blood cells (WBC) (7.26 x 109 /L) and lymphocytes (2.71x109 /L), were observed in h-infected than non-infected with WBC (5.58 x 109 /L) and lymphocytes (2.15x109 /L). Higher values of haematocrit and haemaglobin were recorded for K. Homeana. Males had higher haematocrit (27.27 %) and WBC (7.09 x 109 /L) than females with haematocrit (24.35 %) and WBC (6.93 x 109 /L). Females had higher MCHC, haemoglobin and calcium values than males. The lower values of haematocrit, haemoglobin and MCHC obtained for h-infected tortoises were expected since haemogregarines are usually found intra-erythrocytic in their host thereby destroying affected erythrocytes and causing a decrease in haematocrit value. Higher WBC counts in h-infected tortoises is typical in diseased conditions. The higher level of calcium in female tortoises is due to their reproductive cycle especially vitellogenesis and egg formation. Hypo-proteinaemia recorded in h- infected tortoises was attributed to parasitism. It is concluded that majority of haematological and biochemical analytes showed considerable variations with level of infection status, species and gender.
Keywords: Kinixys belliana; Kinixys homeana; Haematology; Plasma biochemistry; Haemogregarine parasites 
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