1,720,955 research outputs found
The econometric estimation of the domestic demand for broiler meat in South Africa(1971-2012)
Full text linkThesis (MSc. (Agricultural Economics)) -- University of Limpopo,2015The aim of the study was to estimate the future demand for broiler meat in South Africa.
The first objective of the study was to identify factors that affect the demand of broiler
meat. The second objective of the study was to determine whether the variation in
specific economic factors have a significant effect on the quantity of broiler meat
demanded in South Africa. The third objective of the study was to determine whether
the variation in joint economic factors have a significant effect on the quantity of broiler
meat demanded in South Africa. The data used in the study were obtained from
Department of Agriculture, Forestry and Fisheries under Directorate Agricultural
Statistics and Economic Analysis. Log-log model was used on historical time series data
starting from 1971 to 2012 to estimate the demand of broiler meat in South Africa. Data
were further categorized into two periods; that is; 1971 to 1995 and 1996 to 2012, to
check the effect of policy changes on the demand for broiler meat which is the
deregulation of agricultural markets. The results of the study revealed that the main determinants of broiler meat demand include price of broiler meat, price of beef, price of pork, price of mutton and the level of income. The regression results for the period 1971 to 1995 reveals that broiler meat demand was inelastic with respect to price of broiler meat. The results of the study further revealed that beef, mutton and pork are the substitutes of broiler meat and they have significant effect on the demand for broiler meat. The regression results for the period 1996 to 2012 indicated that all the factors have significant effect on the demand for broiler meat with the exception of mutton price.
The results further indicated that short-run price elasticity of demand ranged from 0.531
to 0.932 and long-run demand elasticities ranged from 0.695 to 1.73 for the period
between 1971 and 1995. This implied that broiler consumers were more responsive to
price changes in the long-run. In addition, price elasticity of demand ranged from 0.152
to 0.190 in the short-run for the period between 1996 and 2012, while in the long-run the
elasticities ranged from 0.530 to 1.05 signifying that behavioral adaptation plays a
significant role on the changes of price. Income elasticity in both short and long-run
stood at 8.631 and 8.394 respectively for the period between 1971 and 1995.
On the other hand, for the period between 1996 and 2012 it stood at 1.787 in the short run and 2.755 in the long-run. This signifies that income had a greater effect on the
demand for broiler meat for both periods. However, the effect was even greater for the
period between (1971 and 1995) implying that the effect of income on broiler meat
demand is fading away today in South Africa. This may further imply that in the future
broiler meat in South Africa will be considered as an inferior good. It is on the basis of these results that the study recommends that more research be undertaken in order to understand the nature of broiler meat industry in South Africa before any policy development is made. The study for the time being, also recommends that the Department of Agriculture provide a policy instrument such as subsidies on animal feeds, purposefully to encourage more farmers in broiler production. This recommendation will increase production in pursue to respond to the high demand for broiler meat in the country
An investigation teachers' instructional decisions on the development of learners' entrepreneurial skills in agricultural sciences in the Limpopo Province, South Africa : a case of the Sekhukhune District
Full text linkThesis (Ph. D. Education (Science Education)) -- University of Limpopo, 2021The development of learners’ entrepreneurial skills in Agricultural Sciences remains as
one of the crucial aspects in the midst of the high unemployment rate in South Africa.
Development of these skills depends on the capacity of teachers’ instructional decisions.
These skills play a significant role in the agricultural sector as this sector experiences
changes in the production and marketing of agricultural products. These significant
changes demand relevant skills, such as negotiation skills, critical thinking skills and
creativity skills, in order to support these changes and also for school leavers to remain
relevant in the 21st century.
Therefore, it is against this background that the study sought to investigate teachers’
instructional decisions on the development of learners’ entrepreneurial skills in an
Agricultural Sciences classroom. The social reconstructionism theory was used as a
framework to guide how teaching and learning should be structured in order to develop
agricultural entrepreneurial skills. The study was submersed in the exploratory mixed
method approach. Purposive and systematic sampling were used to select 4 teachers
and 100 Grade 12 Agricultural Sciences learners from 4 local secondary schools in the
Sekhukhune District of Limpopo, from whom the data were collected through the use of
observational inventory and questionnaires. Interpretative analysis and a multinomial
logistic regression model were used to analyse the collected data.
The study found that Agricultural Sciences lessons were dominated by traditional
methods for both teaching and assessment because teaching is geared towards passing
control tests and examinations rather than towards the development of skills.
Furthermore, a lack of professional knowledge was also visible, where lessons were not
properly planned and the teachers’ inability to relate the lesson to reality was evident. It
was also observed from the results of the multinomial logistic regression that other factors
that influence the development of agricultural entrepreneurial skills include, among
others, the type of questions asked, the learning environment and the number of practical
lessons. The study further found that 68% of learners prefers to learn through interact
methods other than the traditional methods. The results further indicated that learners
have positive attitudes towards learning agricultural entrepreneurship and they also use
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some this knowledge in their daily activities. Therefore, as a result of this study, the
researcher recommends that the Department of Basic Education, in conjunction with
institutions of higher learning, provide regular workshops or training opportunities for
Agricultural Sciences teachers so that they become relevant practitioners of developing
learners’ agricultural entrepreneurial skills. The workshops should focus mainly on
planning a lesson for a vocational subject like Agricultural Sciences, and emphasis should
be placed on the type of resources relevant to the teaching of Agricultural Sciences
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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