1,721,040 research outputs found
Geology of the Florida Group [cartographic material] /
No full textFig. 55.; Map of Florida Group showing sedimentary and igneous rocks, geological boundaries, dips and strikes, faults and fractures.; Also available online http://nla.gov.au/nla.map-vn471151. Marginal diagram
Fluorescence-based optical sensor and method for detection of lipid-soluble analytes
No full textA sensor, probe, system and method for detecting the presence of or concentration of lipid-soluble analytes such as anesthetics, which involve the use of fluorophore-containing lipid layers or similar amphiphilic structures as the sensor. The lipid layer is constituted such that it has a phase transition temperature equal to or close to the temperature at which the measurement of the analyte is conducted. Partitioning of a suitable analyte into the lipid layer results in a phase change which is then reflected in a change in a fluorescence characteristic, such as a shift in the wavelength of maximum intensity of fluorescence, of the fluorophore, in proportion to the amount of analyte
Reducing contamination of water bodies from European vegetable production systems
No full textDiverse vegetable production systems are an essential part of European food production. Nitrogen (N) fertiliser and commonly irrigation are integral to European vegetable cropping. Applications of N and irrigation are generally based on the experience of growers and technical advisors. Commonly, applications of both exceed crop requirements causing nitrate (NO3-) leaching. This can result in NO3- contamination of underlying aquifers, which can also contribute to eutrophication of natural surface water bodies. Various agronomic characteristics of vegetable crops such as shallow roots, low density planting and multiple cropping exacerbate the risk of NO3- leaching. Because of health and environmental concerns related to NO3- contaminated groundwater and eutrophication, there is appreciable and increasing societal pressure to reduce these environmental impacts. Additionally, there is increasing societal pressure to reduce emissions of phosphorus and plant protection products to water bodies. The European Union (EU) has passed several Directives to reduce contamination of water bodies from agriculture. Member States of the EU are required to comply and implement these legislations. European consumers are increasingly concerned that their food is produced with minimal environmental impact. Product certification schemes, with requirements or recommendation for N and irrigation management, are required in order to sell vegetables through many European supermarket chains. Because of legislative and consumer pressure, European vegetable growers will increasingly need to adopt science-based management approaches to reduce contamination of water bodies from their farming operations. The virtual Special Issue "Reducing contamination of water bodies from European vegetable production systems" consists of eight review papers that revise the options available to European vegetable growers. The issues facing particular European vegetable production systems are also addressed
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
Decision support systems and models for aiding irrigation and nutrient management of vegetable crops
Full text linkVegetable growers in Europe are continually under increasing pressure to optimize irrigation and nutrient management. This results from the widespread effects of climate change and of competition from other sectors for water, and increasing societal pressure to reduce nutrient contamination of water bodies. The widespread and growing adoption of drip irrigation and fertigation provides vegetable growers with the technical infrastructure for greatly improved irrigation and nutrient management. However, quantitative decisions to achieve optimal irrigation and nutrient management, and increasingly of the two together, require complex decision-making. Numerous factors regarding climate, soil characteristics, field infrastructure, and crop characteristics need to be considered. Decision Support Systems (DSSs) and simulation models are tools that process large and diverse amounts of information to provide irrigation and nutrient recommendations that are specific to individual crops and sites. Commonly, DSSs incorporate simulation models, which enables site and crop specific assessment, and the possibility for dynamic responses to fluctuations in climate etc. There is an on-going trend for web-based DSSs that can access on-line data bases such as of climate and soil data, and that users consult with smartphone Apps. This article firstly reviews several general aspects regarding the use of DSSs/models in commercial vegetable production, such as how to enhance their user-friendliness. Subsequently, it describes DSSs/models that have been developed or are being used to assist with irrigation or nutrient management, or both, of vegetable crops. The most relevant aspects of these DSSs/models are highlighted. In addition to DSSs/models for practical on-farm management, the use of DSSs/models for scenario analysis to demonstrate theoretical case studies to policy makers, growers and advisors is discussed. A focus throughout is on how to make these products attractive and effective to potential users. The geographical focus is on Europe; however, particularly relevant cases from elsewhere are also considered. With the current state of Information and Communication Technology (ICT), and considering the inevitable future developments, DSSs can provide vegetable growers with effective and user-friendly tools to assist them to optimize irrigation and nutrient management
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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