1,720,954 research outputs found
Education for sustainable agriculture: the old and new curricula for agricultural sciences in South African schools
Get PDFAbstractThis article explores the support given to Education for Sustainable Agriculture (ESA) bythe South African Agricultural Sciences school curricula. It compares two post-apartheidcurricula: the current Curriculum Assessment Policy Statements (CAPS) and the phased-outNational Curriculum Statement (NCS) for Agricultural Sciences in terms of content,knowledge requirements, cognitive processes and philosophies of education for sustainableagriculture, as well as the role of assessment and the stated purpose of the curricula. Whilethe NCS had a vision of sustainable agriculture and of a progressive curriculum, these aimswere not supported in the detail of the curriculum. The CAPS presents a shift back to moretraditional, discipline-based agriculture, with a detailed curriculum, which provides moresupport for ESA in terms of fundamental ecological knowledge as well as sustainableagriculture strategies. However, the CAPS, has fewer requirements for practical agriculture,higher order learning and engagement with broad socio-economic issues. The paperconcludes with recommendations for supporting ESA, through teacher education andamendments to the assessment requirements
The impact of communal land-use on the biodiversity of a conserved grassland at Cathedral Peak, uKhahlamba-Drakensberg Park, South Africa : implications for sustainable utilization of montane grasslands.
Get PDFThesis (M.Env.Dev.)-University of KwaZulu-Natal, Pietermaritzburg, 2004.South African grasslands are under-conserved and there is a need to expand conservation
efforts beyond the boundaries of protected areas. While communal grasslands have
conservation potential they are generally over-utilized and the impact of communal land-use
on biodiversity is poorly studied. At the same time there is pressure on protected areas to
allow for the sustainable utilization of biodiversity. The aim of this study was to examine the
impact of communal land-use on various components of biodiversity and to make
recommendations regarding communal use of protected areas.
A fence-line study was conducted to assess the impact of eight years of controlled communal
land-use on biodiversity in the uKhahlamba-Drakensberg Park. The communally used land
(referred to as the lease land) which was used for controlled grazing as well as plant collection
was compared with land under formal conservation. Vegetation was sampled using the
importance score method and veld condition assessments. Selected invertebrate taxa were
sampled using sweep netting, colour pan traps and transects and were identified to
morphospecies level.
Multivariate statistics revealed that sites generally grouped according to landscape position
rather than land-use. No significant differences were found in diversity, evenness, richness or
veld condition between the lease and conservation land. However, more than twenty-five
percent of vegetation and invertebrate species were found exclusively in the lease or
conservation land, suggesting that different suites of species were supported by the two landuses.
Four alien plant species were found exclusively in the lease land, while one vulnerable
and one rare plant species were found only in the conservation land.
Further research is required to assess whether biodiversity was diminished by controlled
communal. While the lease concept may offer potential as a low-use buffer zone, localised
damage from cattle paths and weak enforcement of grazing agreements were areas of concern.
Keywords: communal grass)ands, grassland flora, grassland invertebrates, transfrontier park.Page 39 of component A - missing
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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