871 research outputs found
Modelling cultural shift : application to language decline and extinction
No full textCultural shift is present in many aspects of human history. Here we present a model developed to study the particular case of language shift when a minority language is in competition with another language, which is perceived by the population as being socially and economically more advantageous (Isern and Fort, J. R. Soc. Interface 2014). We show that this model can describe satisfactorily the decline on the fraction of Welsh speakers over the last century. We also apply our language shift model as an interaction term into a reaction-diffusion equation and use it to predict the spread of retreat of the area of prevalence of the Welsh language. We find that the predictions are consistent with observational data
Modelling cultural shift: application to language decline and extinction
No full textSocial Simulation Conference (2014 : Barcelona, Spain). Proceedings of the Social Simulation Conference held at Barcelona, Catalunya (Spain), September 15, 2014: 10th Artificial Economics Conference AE10th Conference of the European Social Simulation association ESSA 1st Simulating the Past to Understand Human History SPUHHHCultural shift is present in many aspects of human history. Here we present a model developed to study the particular case of language shift when a minority language is in competition with another language, which is perceived by the population as being socially and economically more advantageous (Isern and Fort, J. R. Soc. Interface 2014). We show that this model can describe satisfactorily the decline on the fraction of Welsh speakers over the last century. We also apply our language shift model as an interaction term into a reaction-diffusion equation and use it to predict the spread of retreat of the area of prevalence of the Welsh language. We find that the predictions are consistent with observational dat
The behavior of the electromagnetic sensor and its calibration for soil salinity
No full text16 Pags.- 4 Figs.- 6 Tabls. © The Authors. Under a Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).This is an English translation from the Authors of the published article :
López-Bruna D, Herrero J. El comportamiento del sensor electromagnético y su calibracíón frente a la salinidad edáfica. Agronomie 16: 95-105 (1996) hhttp://dx.doi.org/10.1051/agro:19960203 http://hdl.handle.net/10261/8412Soil salinity survey is easy with a portable electromagnetic (EM) sensor, but the readings have to be converted to a standard measure of soil salinity, such as soil saturated extract electrical conductivity (ECe). Several authors use nonlinear transformations of the EM readings to avoid collinearity between regression variables or to decrease errors in the estimates. EM data and soil samples at 1 m depth taken in an irrigated plot in three consecutive years showed that linear calibration methods are sufficiently accurate for soil salinity studies. Linear methods also seem to give information on the salinity profile, although this aspect needs to be further tested. Nonlinearities may appear between EM readings and bulk soil electrical conductivity due to the design characteristics of the EM sensor used, but they can be corrected using the technical characteristics provided by the manufacturer.Peer reviewe
Modelling cultural shift: application to language decline and extinction
No full textSocial Simulation Conference (2014 : Barcelona, Spain). Proceedings of the Social Simulation Conference held at Barcelona, Catalunya (Spain), September 15, 2014: 10th Artificial Economics Conference AE10th Conference of the European Social Simulation association ESSA 1st Simulating the Past to Understand Human History SPUHHHCultural shift is present in many aspects of human history. Here we present a model developed to study the particular case of language shift when a minority language is in competition with another language, which is perceived by the population as being socially and economically more advantageous (Isern and Fort, J. R. Soc. Interface 2014). We show that this model can describe satisfactorily the decline on the fraction of Welsh speakers over the last century. We also apply our language shift model as an interaction term into a reaction-diffusion equation and use it to predict the spread of retreat of the area of prevalence of the Welsh language. We find that the predictions are consistent with observational dat
New Axion and Hidden Photon Constraints from a Solar Data Global Fit
No full textWe present a new statistical analysis that combines helioseismology and solar neutrino observations to place upper limits to the properties of non standard weakly interacting particles. We present two applications to test the method: the well studied case of axions and the more novel case of low mass hidden photons. For axions we obtain an upper limit at for the axion-photon coupling constant of . For hidden photons we obtain the most restrictive upper limit available accross a wide range of masses for the product of the kinetic mixing and mass of at . Both cases improve the previous solar constraints based on the Standard Solar Models
Control Action Continuity on Situation-Based Obstacle Avoidance
No full textThis work is related to the analysis of reactive obstacle avoidance in general, and specifically to ND algorithms family. Contrary to many previous methods, the ND approach is not aimed at, devising a general motion law: instead, it. operates over a reduced set of possible situations that are treated by a, particular motion law. The big earning of this idea is that, it; eases the design of control, as now motion laws are specific to every identifiable situation. However, it; also raises new issues as nothing guarantees the control action continuity when the diagnostic changes. In this paper a modification of the ND approach, along with experimental results, is presented in order to improve this aspect of the method.45244
Ground composition data for the southernmost area of Lérida province, NE Spain [Dataset]
No full textMore than 3000 physical, chemical and morphological data of soils described between December 1980 and July 1981 in the southernmost part of the province of Lérida, NE Spain, are collected in this dataset. The soils are located between the coordinates 41.62°N 1.06°E, and 41.28°N 0.34°E.
Most of the soil samples were taken in backhoe dug pits where their profiles were described. The data —presented here in an Excel spreadsheet— come from the book by J. Porta & R. Julià (eds.) published in 1982 with I.S.B.N. 84-5008771-6. Moreover, two chapters were scanned from this book and included in this dataset as “Description.pdf” and “FormationClassification.pdf”. The author did not proofread the galley proofs of these chapters. The data contained in “Description.pdf” were manually transcribed in 2025 to the excel file “ProfilesLerida04clas.xlsx”.
Care must be taken with the location coordinates given the non-correction of the galley proofs and because the resources available to us 45 years ago were quite rudimentary. The excel file “ProfilesLerida04clas.xlsx” incorporates the correction of obvious errors in the coordinates and their transformation to ETRS89 from the notations used in 1980-81. The help of Ms. Rosa Gómez-Báguena with the coordinates is greatly appreciated.
We also present the file "1989 XVI Reun.SECS Lérida suelos secano", a report including discussion and data about the studied soils.This research was possible thanks to the grant PID2021-127170OB-I00 funded by
MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”, and the grant
TED2021-130303B-I00 funded by MCIN/AEI/10.13039/501100011033 and by the “European Union NextGeneration EU/PRTR”.Peer reviewe
Bull Threshers and Bindlestiffs: Harvesting and Threshing on the North American Plains
No full textThomas D. Isern is Professor of History & University Distinguished Professor of History at North Dakota State University. He is the author and coauthor of six books, including Dakota Circle: Excursions on the True Plains and Custom Combining on the Great Plains.This Kansas Open Books title is funded by a grant from the National Endowment for the Humanities and the Andrew W. Mellon Foundation Humanities Open Book Program.Bull Threshers and Bindlestiffs is a panorama on a continental canvas: the Great Plains of North America, stretching from Texas to Alberta. Onto this surface the author lays the large features of regional practice in the harvesting and threshing of wheat during the days before the combined harvester harvesting with binder and header, threshing with bull thresher and steam engine. Into the picture he places the key figures who accomplished the task of gathering the grain the farm men and women, the custom threshermen, and the bindlestiffs, or itinerant laborers. Affectionately he sketches the small details of folklife that comprised the everyday work and culture of the wheat belt building shocks, loading racks, constructing stacks, pitching bundles into the separator, hauling water to the engine, drinking deep from the crockery water jug. Bull Threshers and Bindlestiffs is a profusely illustrated study of a complex, vigorous regional culture concerned with the production of wheat a culture that centered around the annual harvest and declined with the advent of the combine. This is an examination of the interaction of culture, environment, and technology with import for the fields of agricultural history and regional history. More than that, with its grassroots research, its descriptions of tools and customs, and its lavish illustrations, it is a re-creation of a proud phase of regional life previously captured only in yellowed albumen photographs
Co film stretching induced by lattice mismatch and annealing : The role of Graphene
No full textThin Co films intercalated between a Graphene capping layer and the Ir(111) surface are of interest for spintronics applications due to their peculiar magnetic properties and to their chemical stability. The structure, and then the magnetic properties, of the Co films depend on the intercalation process which is strongly influenced by the temperature, total amount of Cobalt and quality of the capping Graphene layer. In order to identify and disentangle the effects of these contributions, we report on the structural characterisation of four Co films as a function of thickness, annealing temperature, and Graphene capping. From the structural point of view, the deposition of Co on a hot Ir substrate mimics quite well the intercalation process proving the validity of the colander model describing the Graphene role during the process
Gypsum from soils of chesas, NE Spain [Dataset]
No full textDocuments:
Chesas_Thin_sections_scans.zip
Chesas_Fig.captions1991-01.xlsxWe show data of soils developed on the outcropping gypseous nucleus of the Barbastro-Balaguer anticline, NE Spain. Chesas is the local name for the lands of this outcrop that stand out by their whitish tones. The data collected here come from soils of the municipalities —from West to East— of Peraltilla, Almunia de San Juan, Tamarite, Torá, and Iborra. The analytical methods plus details of the landscape and sampling sites can be found in: (i) the book entitled “Morfología y génesis de suelos sobre yesos” (http://hdl.handle.net/10261/84695), and (ii) the article entitled “Salada Farrachuela, a saline wetland in Tamarite de Litera, Spain” (DOI: 10.29077/bol.114.ce05.herrero).
Here we present a compressed zip file with 302 TIFF images corresponding to 151 thin sections of these soils. Most of the sections —with the prevalent size of 13.5 × 5.7 cm— were manufactured by the first author in the Institut National Agronomique de Paris-Grignon under the technical supervision of Mr. P. Guilloré, in the context of a scholarship granted by the Government of France for working in the lab of Dr. N. Fédoroff. The surviving thin sections from chesas are archived and scanned at the EEAD-CSIC in Zaragoza, Spain. Their scans are compiled in the file “Chesas_Thin_sections_scans.zip”.
Several dozen micrographs of the chesas thin sections appeared in the abovementioned book published in 1991 (http://hdl.handle.net/10261/84695). The file “Chesas_Fig.captions1991-01.xlsx” presents a tentative English translation of the 154 Figure captions for the micrographs and the other figures in the book.We acknowledge the grant PID2021-127170OB-I00 funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”, and the grant TED2021-130303B-I00 funded by MCIN/AEI/10.13039/501100011033 and by the “European Union NextGeneration EU/PRTR”.Peer reviewe
- …
