1,720,959 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
Mulched rip lines stop soil erosion under annual cropping on steep slopes in northwest tasmania
No full textA new soil erosion control technique has been developed for use on steep slopes used for annual cropping. A purpose-built implement has been designed for installing the mulched rip lines. Immediately after sowing of the crop a 2-tined implement is used with a wheeled tractor to install rip lines on the level across the slope. Cereal straw is laid at the same time by the implement on top of the rip lines at the rate of approximately 5 tonnes/hectare. The rip lines are spaced from 25 to 80 metres apart depending on the slope of the paddock. This methods of erosion control is designed to keep runoff water on the paddock by slowing water movement down slope with the straw and getting the water to infiltrate into the soil via the rip lines. As an added bonus, any soil moving down slope is trapped by the straw and so prevented from leaving the paddock
Soil health for farming in Tasmania
No full textSoil Health for Farming in Tasmania is a practical reference for those who are interested in identifying readily observable soil attributes that impact on farm management. The book describes soil properties important for farming in Tasmania and the distribution of the major soil orders around the State. The book has an emphasis on what you can see and feel that will indicate a soil's health with some guidance on what can be done about managing in a practical on-the-paddock way. Soil properties important in determining soil health are covered including structure, texture, organic matter, pH and compaction. Guidance is given on a range of soil management issues including tillage, drainage, irrigation, rotations and erosion control. Soil health is identified as an important key to sustainable land management in order to protect and improve long-term agricultural productivity, surface water quality, and habitats of all organisms, including people
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
Assessment and management of inherent and dynamic soil properties for intensive agriculture in the North Island, New Zealand and Tasmania, Australia
No full textThe primary aim of the research reviewed in this thesis has been to provide information required by land managers on inherent and dynamic soil properties for sustainable intensive agriculture. A soil survey in the Te Puke district, New Zealand, found the soils to be young with the majority having a layer of tephra in their profiles which gives rise to low overall nutrient status and free draining properties. Soils in north west Tasmania were found to be predominantly Red Ferrosols formed on basalt. The Ferrosols are characteristically strongly structured, strongly acid and have high organic carbon contents. The Ferrosols surveyed were being managed at their optimum land capability or better, with little evidence of soil degradation. The importance of taking a morphological approach to the studies of soil health is illustrated by comparing data from similar paddock histories across the soil orders studied. The differences in physical properties and soil carbon contents between soil orders were pronounced. The measured effects of cropping on soils varied depending on inherent differences between the soils studied. Soil carbon levels were found to be falling with increased years of cropping on all soils studied. Strong correlations were found between soil carbon and a range of soil physical, chemical and biological properties. Target levels of soil carbon are suggested for cropping systems, which can be used as an indicator of sustainability. The soil properties and paddock variables found to be significantly correlated with crop yield varied, depending on crop and soil type. Two easily applied measures of soil structure were correlated to crop production on heavier textured soils. Research into the off-site effects of agriculture in north west Tasmania found that there were high levels of water turbidity caused by soil erosion from cropped paddocks and high levels of nutrients emanating from dairy pastures on drained lowland areas. There has been a positive change in farmer perceptions and soil management practices over a ten-year period in north west Tasmania. Several information brochures have been published for farmers to assess and manage their soils for sustainable production. The research undertaken and reviewed here has produced information on inherent and dynamic soil properties required by farmers for sustainable intensive agriculture. The work has played a major role in the understanding of how soil management has an impact both on and off site and in influencing soil management on farms in both Tasmania and the Bay of Plenty, New Zealand
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
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