1,720,965 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
The effect of a 12–week home–based exercise intervention programme on cardio-metabolic disease risk factors
Get PDFDissertation presented in the partial fulfillment of the requirements for the degree of Master of Science in the Department of Biokinetics and Sports Science at the University of Zululand, South Africa, 2012.This study evaluated the use, safety, and short-term benefits of a home-based physical
activity programme, on cardio-metabolic disease risk factors.
Sedentary individuals (n=67) were recruited for the study and those that qualified
obtained medical clearance to participate. Participants received an individual log book to record
their full day activities and meals, and were instructed to complete the home–based programme
three days/week for 12 weeks. The home-based programme consisted of three exercise routines
(aerobic, resistance and stretching). Outcomes included changes from baseline to 12 weeks in:
weight, body mass index (BMI), waist to hip ratio, fat percentage, systolic and diastolic blood
pressure, resting heart rate, fasting total cholesterol, and fasting blood glucose.
Forty-six participants completed the study. A significant improvement between baseline
and 12 weeks post intervention for diastolic blood pressure (77 mmHg – 68 mmHg; 11.7%, p <
0.05) was identified. From baseline to 12 weeks a decrease of 9% was noted in the number of
participants in the moderate risk category while the number of participants in the low risk
category increased by 19%. No other statistically significant differences were detected between
the baseline and 12 weeks.
Despite the observation that minimal statistically significant changes occurred as a
result of the 12–week intervention, scores evidently show that the physical activity programme
was beneficial in eliciting some positive changes (%) that may reduce cardiovascular risk. More
prominent effects may have been observed with the inclusion of a calorie restriction programme.University of Zululan
The effects of a low-carbohydrate, high-fat diet on type 2 diabetic patients
Get PDFThesis submitted to the Department of Human Movement Science in fulfilment of the requirements for the award of Philosophiae Doctor in Human Movement Science, Faculty of Science and Agriculture at the University of Zululand, 2019.Diabetes amongst South Africans is increasing at an alarming rate. With 8.27% – 9% of the population suffering from diabetes, the majority is Type 2. It is predicted that diabetes will have doubled by 2030. The aims of this study were first to determine the effectiveness of a low carbohydrate high fat diet (LCHFD) on Type 2 diabetic patients. Secondly, to see what the effects of a concurrent physical activity programme with an LCHFD will have on Type 2 diabetic patients. Lastly, this study aimed to determine the effects on cholesterol and lipoproteins using an LCHFD on Type 2 diabetic patients. Participants were recruited from patients registered at the Richards Bay Diabetic Clinic and surrounding area in Zululand, KwaZulu-Natal, South Africa and were screened and received approval by a medical doctor at the diabetic clinic for participation in the study. Twenty-eight female and eleven male Type 2 diabetics (N = 39) aged 31-71 years were assigned into either a concurrent physical activity and LCHFD group (DiExG) (n = 14) which followed a 16-week program consisting of physical activity program entailing walking a minimum of 10 000 steps daily (measured using a pedometer wristband) combined with an LCHFD requiring participants not to consume more than 50grams (g) of carbohydrates per day for the 16-week experimental period, LCHFD only group (DietG) (n = 11) which were required to follow an LCHFD requiring participants not to consume more than 50g of carbohydrates per day or control group (ConG) (n = 14), whose members continued with their normal daily activities throughout the 16-week period.
Of the initial 39 patients with Type 2 diabetes mellitus who were eligible to participate in the study, 35 patients (DiExG: n=12, DietG: n=10, ConG: n=13) completed the study and were included in the final analysis. The results revealed no significant (p>0.05) changes in glycated haemoglobin (HbA1c), glucose and insulin in either the DiExG (HbA1c: p=0.592; 8.3% decrease, glucose: p=0.477; 11.1% decrease and insulin: p=0.367; 44.1% increase) or DietG (HbA1c: p=0.822; 0% change, glucose: p=0.108; 11.0% decrease and insulin: p=0.976; 4.2% decrease). No significant (p>0.05) changes were found in the DiExG and DietG regarding body mass (p=0.999; 2.0% decrease and p=0.991; 2.5% decrease; respectively), body mass index (BMI) (p=0.999; 2.2% decrease and p=0.998; 2.3% decrease; respectively), percentage body fat (%BF) (p=0.693; 16.7% decrease and p=0.928; 13.0% decrease, respectively), waist circumferences (p=0.929; 5.4% decrease and p=0.71; 6.3% decrease, respectively), hip circumference (p=0.85; 5.8% decrease and p=0.414; 7.0% decrease; respectively) and waist-to-hip ratio (WHR) (p=0.999; 0% difference and p=0.999; 0% difference, respectively). No significant (p>0.05) changes were observed in total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG) and high-density lipoprotein cholesterol (HDL-C) in either the DiExG (TC: p=0.791; 2.0% increase, LDL-C: p=0.704; 7.4% increase, TG: p=0.477; 9.5% decrease and HDL-C: p=0.989; 0% change) or DietG (TC: p=0.881; 0% change, LDL-C: p=0.744; 13.8% decrease, TG: p=0.677; 17.9% increase and HDL-C: p=0.844; 0% change).
In conclusion, neither an LCHFD alone or in combined with a physical activity programme failed to elicit improvements in insulin sensitivity and should not indisputably be included in a treatment regime to manage or improve body composition in Type 2 diabetics. As such, adoption of an LCHFD, either alone or combination with physical activity, should not unequivocally be adopted as part of the treatment approach for Type 2 diabetics and should carefully be weighed against the benefits of more traditional dietary and/or physical activity interventions. This study further concludes that the LCHFD with or without exercise has no beneficial or negative adaptations to cholesterol in Type 2 diabetics
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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