1,720,958 research outputs found
Detailed global modelling of soil organic carbon in cropland, grassland and forest soils
No full textSupporting information of the paper: Morais, T.G., Teixeira, R.F.M., Domingos, T. 2019. Detailed global modelling of soil organic carbon in cropland, grassland and forest soils. PloS One.
EDIT: Version 2 includes raster files (.tif) for each land use class (including: Attainable SOC stock, mineralization rate, and fator K). Available here: https://zenodo.org/record/4173186#.X57hYYj7SU
RothC model - TMorais implementation in MATLAB
No full textThis MATLAB© script runs the Rothamsted Carbon (RothC) Model.
This script can be used to model Soil organic carbon (SOC) stock for land use transitions between crops and also between crops and forest land use classes (and vice-versa).
Instruction for use
Open MATLAB
Import/Prepare all the data requirements as MATLAB variables
Note: Data preparation can be perform in other software and then imported to MATLAB as CSV or Excel files
Run the function: “RothC_TMorais” with the following code line:
(lu, soc_lu1, clay, DMPRPMratio, DPM, RPM, IOM, Hum, Bio, temp, prec, evap, irr, land_cover, manure_reg, man_dist, yield_reg, res_dist, for_res_uhtu)
The output of the “RothC_TMorais” function is a vector with the SOC stock (t C/ha) over 86 years
Run the function: “CFs_calculation” to calculate foreground and background CFs
Data required
Land use class (the list of land use classes is available in Morais et al. (2019))
LU classes between 1 and 63 correspond to crops
LU classes higher than 63 correspond to forest and grassland
Variable name: lu
Initial SOC stock (t C/ha)
Variable name: soc_lu1
Clay content (%)
Variable name: clay
DPM/RPM ratio (-)
Variable name: DMPRPMratio
Initial SOC stock division between pools (t C/ha):
Variable name: DPM
Variable name: RPM
Variable name: Hum
Variable name: Bio
Variable name: IOM
Monthly average temperature (ºC)
Variable name: temp
Monthly accumulated precipitation (mm)
Variable name: prec
Monthly evapotranspiration (mm)
Variable name: evap
Irrigation requirements (mm)
Variable name: irr_reg
Land cover period (1 if soil is covered and 0 if soil in bare)
Variable name: land_cover
Manure application (t C/ha)
Variable name: manure_reg
Manure application distribution between months (%/month)
Variable name: man_dist
Crop yield (if forest land use class – it is equal to zero) (t/ha)
Variable name: yield_reg
Residues distribution between months (%/months)
Variable name: res_dist
Forest residues generation (if crop land use class – it is equal to zero) (t C/ha)
Variable name: for_res_uhtu
This script was produced by Tiago Morais ([email protected] or [email protected]).
Morais, T.G., Teixeira, R.F.M., Domingos, T., 2019. Detailed global modelling of soil organic carbon in cropland, grassland and forest soils. PLoS One 14, e0222604. https://doi.org/10.1371/journal.pone.0222604
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
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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