1,720,967 research outputs found
Best management strategies for the Australian dairy industry using multiple linear regression techniques
Get PDFDairy farmers in Australia are under increasing pressure to demonstrate that their production systems are environmentally friendly (Armstrong et al. 2000). These farmers need assistance in evaluating the impact on their profitability of a range of environmental and social management practices. In 2000, the Australian Dairy Research and Development Corporation conducted a large-scale telephone survey of 1826 Australian
dairy farms to examine current on-farm management practices in relation to milk production and farm and farmer demographics (DRDC 2001). The questionnaire results
from the 196 dairy farms in the sub-tropical region of South East Queensland and Northern New South Wales were analysed in three steps. Firstly, multiple linear
regression models were produced for all dairy farms within the region. Secondly, farms that produced less than 750kL per annum were treated as a separate population and a
specific model was developed for these cases. Finally, farms that produced in excess of 750 kilolitres (kL) were analyzed and a linear model was developed for members of this population. An important outcome of the analysis was the construction of management profiles of farmers in different milk production classes, in particular, identification of the specific management practices which define a farmer’s ability to produce optimal yield
Trade-offs between the Economic, Social and Environmental Objectives in Optimal Resource Management in the Fang Watershed, Chiang Mai Province, Thailand
No full textAbstractThe objective of this study was to find the relationships and trade-offs between the citrus farms and the natural resource management at the watershed level. Data collection were done among 149 households in Chai Prakan, Fang and Mae Ai districts, Chiang Mai, Thailand. A weighted multi-goal programming was employed with eight model objectives/goals covering economic, social and environmental aspects. These were maximization of annual equivalent value (AEV) of cropping systems, employment and revenue from non-timber forest products and minimization of revenue variance, dependence from external inputs, expenditure on pesticides, nitrogen use, soil erosion. This study looked at trade-offs between decisions at the farm and watershed level, economic and environmental objectives, economic and social objectives, and social and environmental objectives. If decisions on optimal land use were done at the farm level, farm land in the watershed would be allocated to mixed fruit trees and annual crops while if they were done at the watershed level, land would be planted to fruit trees and some forests and not so much annual crops. Trade-off analysis between different objectives revealed that expenditure on pesticides or nitrogen use as well as soil erosion could be substantially reduced for only a relatively small decrease in the annual equivalent value and employment. On the other hand, employment could not be much reduced without scarifying farmers’ income. Nevertheless, further reductions in the environmental goals would lead to rapid rates of reduction in employment and the annual equivalent value
A Data Mining Approach to Simulating Land Use Decisions Modeling Farmers Crop Choice from Farm Level Data for Integrated Water Resource Management.
No full textNatural resource management policies in Thailand and their use in the Mae Chaem Catchment
No full textImpact of Public- and Private- Sector Maize Breeding Research in Asia, 1966-1997/98: Impact of Maize Breeding Research in Thailand: Public- and Private-Sector Collaboration
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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
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