1,720,975 research outputs found
Costs and Benefits of More Efficient Irrigation Systems for Florida Chipping Potato Production
No full textThe goal of this 11-page fact sheet is to help producers and other interested parties understand how alternative irrigation systems can affect economic outcomes in agricultural operations. We used chipping potato production in the Hastings area in northeast Florida as an example to discuss factors to consider when selecting an irrigation system. Written by Jenna Rogers, Tatiana Borisova, Lincoln Zotarelli, Kelly Grogan, Jeffrey Ullman, Jessica Bertine, and Kelly Morgan, and published by the UF Department of Food and Resource Economics, September 2014
Factors Affecting the Choice of Irrigation Systems for Florida Tomato Production
No full textSeveral economic factors should be considered in selecting an agricultural irrigation system. This 7-page fact sheet compares two widely used irrigation systems for tomato production: seepage and sub-surface drip irrigation. Written by Jenna Rogers, Tatiana Borisova, Jeffrey Ullman, Kelly Morgan, Lincoln Zotarelli, and Kelly Grogan, and published by the UF Department of Food and Resource Economics, October 2014. (UF/IFAS Photo: Tyler Jones
Economic Value of Florida Water Resources: Valuing the Quality of Water for Household Needs
No full textFlorida water-resource professionals deciding whether to implement a costly water protection program or to invest in better tap water treatment technology may wonder: Are such investments justified? What are the benefits of the program or investment decision? Just how highly do Floridians value their water? This 5-page fact sheet written by Tatiana Borisova, Syed Irfan Ali Shah, Tara Wade, Xiang Bi, and Kelly Grogan and published by the UF/IFAS Food and Resource Economics Department reviews studies that help assess the value Floridians assign to maintaining or improving the quality of the water supply.
http://edis.ifas.ufl.edu/fe105
Valuing Florida Water Resources: Water Use in Irrigated Agriculture
No full textWater resources provide us with a variety of goods and services (altogether often referred to as ecosystem services or environmental services.) Part of a series entitled Economic Value of Florida Water Resources, this 5-page fact sheet written by Tatiana Borisova, Syed Irfan Ali Shah, Tara Wade, Kelly Grogan, and Xiang Bi and published by the UF/IFAS Food and Resource Economics Department assesses the economic value of the ecosystem services provided by irrigation water and shows the importance to agriculture of water resource protection and restoration.
http:edis.ifas.ufl.edu/fe105
Valuing Florida Water Resources: Water Use in Irrigated Agriculture
No full textWater resources provide us with a variety of goods and services (altogether often referred to as ecosystem services or environmental services.) Part of a series entitled Economic Value of Florida Water Resources, this 5-page fact sheet written by Tatiana Borisova, Syed Irfan Ali Shah, Tara Wade, Kelly Grogan, and Xiang Bi and published by the UF/IFAS Food and Resource Economics Department assesses the economic value of the ecosystem services provided by irrigation water and shows the importance to agriculture of water resource protection and restoration.
http:edis.ifas.ufl.edu/fe105
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
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