1,721,128 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
Exploration of a tiered indicator approach to assess and track the resilience of pastoralism systems to climate and other shocks
No full textA presentation from a workshop on developing pastoral system resilience indicators, held in Addis Ababa on 14-15th December 2023
Household level modelling in CCAFS and other CRPs: Moving from ideas to action
Get PDFAcross different CGIAR centres there is a strong interest in applying farm household models
to evaluate and target adaptation to climate change and variability. The Commonwealth
Scientific and Industrial Research Organization (CSIRO), an important research partner for
the CGIAR Research Program (CRP) on Climate Change, Agriculture and Food Security
(CCAFS), has developed into a top institute in this research area, and has strong interest in
strengthening collaboration with CCAFS and other CRPs like Integrated Systems for the
Humid Tropics. In recent years CCAFS and Humid Tropics have invested a lot of time and
effort in collecting farm household level characterization data and in developing coherent
socio-economic scenarios of change in the near future. Given the current interest in household
level analyses of adaptation and mitigation options, and the availability of data and resources
within CCAFS and other CRPs the aim of the workshop was to develop a community of
practice across CGIAR centres and stimulate active CGIAR – CSIRO collaboration, thereby
more effectively sharing and further developing the wide range of tools and approaches
available in the different institutes. The workshop, besides exchanging information about new
results of on-going work and sharing of approaches and methods also produced a flexible and
stepwise work plan that could be implemented under different scenarios of available funding
Quantifying the tradeoffs between different crop residue uses
No full textDuring the December 2009 SLP meeting in Addis Ababa, Mark van Wijk (WUR) and colleagues presented some modelling work that could help quantify the tradeoffs between uses of crop residues - either incorporated in the soil to maintain soil fertility or fed to cattle. He emphasizes that the models help to quantify the consequences - 'what if' - of different decisions or strategies
From global economic modelling to household level analyses of food security and sustainability: How big is the gap and can we bridge it?
No full textPolicy and decision makers have to make difficult choices to improve the food security of local people against the background of drastic global and local changes. Ex-ante impact assessment using integrated models can help them with these decisions. This review analyses the state of affairs of the multi-scale modelling of policy interventions, with an emphasis on applications in developing countries and livestock systems. Existing models do not sufficiently capture the complexity of human–environment interactions across different scales, and especially the link between landscape and local market levels, and national and sub-national level policies and markets is missing. The paper suggests a step wise approach with increasing data needs to bridge this gap. Improvements need to be made at the description of effects of the distribution of local markets on price formation and the representation of farm diversity within a landscape. Analyses in contrasting agro-ecological systems are needed to derive generic summary functions that can be used as input for macro level model analyses. This is especially pertinent for macro level descriptions of crop and livestock production in relation to price developments and of the mosaic of different agricultural land use responses in regions with contrasting socio-economic conditions and developments
Agricultural productivity and nutrition: The role of women
No full textIt is often assumed that increasing agricultural productivity leads to a better diet. But in fact the relationship is more complex, and gender has an important role in mediating it. There are only a few harmonized datasets available, so the research team built its own tool and used it around the world in different systems. There was a sharp contrast between Africa and Asia. In East Africa, greater market orientation does not lead to better diets because money is spent in lots of ways other than nutrition. In Asia, women have much more control over agriculture and cash, which means that an increase in productivity does improve diets. In Africa, to improve diets it is better to work on crop diversification. Interview with Mark van Wijk (ILRI) for the book "A different kettle of fish? Gender integration in livestock and fish research". http://hdl.handle.net/10568/7668
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