1,720,970 research outputs found
Irrigation of grape and pomegranate by using soil sensors in Apulia Region, Italy
No full textSoil and plant water status can be monitored through different devices, each having advantages and drawbacks. Some plant/soil sensors, such as soil matric potential sensors, can play a key role in scheduling irrigation in orchards and vineyards managed by a more water-efficient use. Soil matric potential (Ψm) is an indicator that can be used for irrigation since it can be easily automated with on-time data acquisition. The midday stem water potential (Ψstem) is considered a very reliable and accurate indicator of plant water status, but it cannot be automated. The Ψm values, automatically collected with data loggers and transmitted through Internet connection on mobile phones/laptops, allowed to keep a good water status for both wine grape and pomegranate. The mean Ψm values at 25 and 50 cm depth showed a good correlation with Ψstem, indicating that midday stem water potential could be estimated by using Ψm values, thus saving time and labor. Since the Ψstem is a reliable indicator of the plant water condition, with Ψm soil sensors, we could either manage irrigation or estimate Ψstem values in a much easier and faster way than using the Scholander chamber (or the pump-up chamber
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
Geophysical field zoning for nitrogen fertilization in durum wheat (Triticum durum Desf.)
Full text linkThe current social context requires an increase in food production, improvement of its quality
characteristics and greater environmental sustainability in the management of agricultural
systems. Technological innovation plays a great role in making agriculture more efficient and
sustainable. One of the main aims of precision farming (PF) is optimizing yield and its quality,
while minimizing environmental impacts and improving the efficient use of resources. Variable rate techniques (VRT) are amongst the main management options for PF, and they
require spatial information. This work incorporates maps of soil properties from low induction
electromagnetic measurements into nitrogen (N) balance calculations for a field application
of VRT nitrogen fertilization of (Triticum durum Desf., var. Tirex). The trial was conducted in
2018–19 at Genzano di Lucania (PZ, Italy) geologically located on the clayey hillsides of the
Bradanica pit and the Sant’Arcangelo basin. Three soil homogeneous areas were detected
through low induction electromagnetic measurements and used as uniform management
zones. The amount of nitrogen fertilizer to be applied by VRT was calculated on the base of
estimated crop nitrogen uptake and soil characteristics of each homogeneous area. Crop
response to VRT was compared to uniform nitrogen application (UA) on the whole field. The
application of VRT resulted in a reduction of 25% nitrogen fertilizer with the same level of
yield respect to UA. Grain protein content, as well as gluten content and N content, were significantly higher in VRT than in UA. As a consequence of lower nitrogen input and higher levels of N removal, VRT reached a higher nitrogen use efficiency than UA, and this indicates a
lower environmental impact and a higher economic profitabilit
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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