1,720,954 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
Modeling the transmission dynamics and control of cassava mosaic disease with non-cassava host plants
Get PDFA Dissertation Submitted in Partial Fulfilment of the Requirements for the Master’s Degree in Mathematical and Computer Sciences and Engineering of the Nelson Mandela African Institution of Science and TechnologyFor many years cassava mosaic disease hinders cassava production in Africa. In this study,
the mathematical model for the transmission dynamics and control of cassava mosaic disease
in cassava and non-cassava host plant populations was formulated and analysed. The next generation matrix technique was employed to obtain the basic reproduction number (R0). The
local stability of the disease-free equilibrium point was determined using the Linearization
method while the normalized forward sensitivity index technique was utilized to analyse the
sensitivity of the model parameters. The optimality control technique, based on the Pontraygin
Maximum Principle, with roguing activities and insecticide application as control strategies,
has been applied to achieve the optimality of objective function. Moreover, the Incremental
Cost-effectiveness Ratio approach was used to perform a cost-effectiveness analysis on control
strategies in combating cassava mosaic disease. Lastly, the numerical simulation for the formu lated models to assess sensitive parameters, global stability and the optimal solution was per formed. The findings reveal the existence and global stability of both disease-free and endemic
equilibrium points when R0 ≤ 1 and R0 > 1 respectively. The most sensitive parameters
for the dynamics of cassava mosaic disease were found to be whitefly mortality rate (ω) and
the whitefly carrying capacity per m2
(κw). The findings from numerical simulation and cost effectiveness analysis on the optimality system conclude that the combined method of roguing
and insecticide application has higher impacts with a lower cost of controlling the disease com pared to the single control approach of roguing activities or insecticide application. Therefore,
for effective and efficient mitigation of cassava mosaic disease, results from this study suggest
the integrated approach of roguing and insecticides applicatio
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
Support Services in the Learning of Mathematics Subject in Open Secondary Schools in Mpwapwa District, Tanzania.
Get PDFA study of support services in the learning of Mathematics subject in Mpwapwa district Open Secondary Schools (OSS) in Tanzania investigated how students enrolled in OSS are supported when learning mathematics for the purpose of attaining a Certificate in Secondary Education (CSE) through The National Examinations Council of Tanzania (NECTA). Specifically, the study determined types of SSS offered by OSS, examined national form four mathematics examination performance for the past three years at the selected open schools, and identified challenges faced by students when studying mathematics in open school. A mixed research approach was employed to get the necessary information. Simple random and purposive sampling techniques were used to select respondents for data collection. Data were collected through interviews, focus group discussions, documentary review, and questionnaire. The study employed a total of 63 respondents that included students, teachers, Head of School, and Regional Coordinator. Findings revealed inadequate support services related to tutor feedback comments, study skills development, face to face tutoring, counseling and guidance services, orientation services in their school, and availability of study material services. The findings also showed that there were poor performance in mathematics subjects and that students faced challenges related to shortages of mathematics tutors, poor foundation and skills in mathematics subject, lack of interest in mathematics subject, shortage of resources including study materials, and shortage of enough time for face to face tutoring sessions and personal study. The study recommended a need for improving support services and further studies on how best to improve mathematics subject teaching and learning process.
Keywords: Student support services, student performanc
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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