609 research outputs found
On the relative projective space
No full textLet (C, ⊗, 1) be an abelian symmetric monoidal category satisfying certain exactness conditions. In this paper we define a presheaf P n C on the category of commutative algebras in C and we prove that this functor is a C-scheme in the sense of B. Toen and M. Vaquié. We give another definition and prove that they give isomorphic C-schemes. This construction gives us a context of non-associative relative algebraic geometry. The most important example of the construction is the octonionic projective spaceFil: Data, Matias Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Matemática; ArgentinaFil: Osorio Morales, Maria Juliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Investigaciones Matemáticas "Luis A. Santaló". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Matemáticas "Luis A. Santaló"; Argentin
Replication Data for: Social and Political Trust in a Low Trust Society
No full textOnline supplement, data and code (R file) to reproduce the results in "Social and Political Trust in a Low Trust Society", published by Political Behavior (2022-01-18
The Rufous-thighed Kite Harpagus diodon is not an endemic breeder of the Atlantic Forest: lessons to assess Wallacean shortfalls
No full textThe migratory Rufous-thighed Kite Harpagus diodon is widely distributed in South America, and a recent spatiotemporal analysis of its distribution that was largely based on citizen science data concluded that it breeds (almost) exclusively in the Atlantic Forest, constituting a ‘hidden endemism’, and that it is a complete migrant, overwintering in the eastern Amazonian lowlands. However, that study missed key data from large areas that would have resulted in a different biogeographical pattern. Here, we reject the ‘hidden endemism’ hypothesis and show that the Rufous-thighed Kite is a more widespread breeder. We propose that to uncover Wallacean shortfalls of migratory birds correctly, (1) citizen science data must be integrated with thorough bibliographical searches and specimen examination and (2) life-cycle categories should be critically determined: failing to recognize the importance of these two key issues can undermine the ability of researchers to uncover the true extent of breeding ranges and timing of migration, resulting in erroneous ecogeographical patterns. By proposing and following a set of recommendations, and using previously unpublished and published documented records mostly from the southwestern portion of the distribution of Rufous-thighed Kite, we here show that this species breeds in the Cerrado of eastern Bolivia and is present during the austral spring and summer in the Austral Yungas but largely absent during the austral autumn and winter, mirroring the seasonality of the species in the Atlantic Forest.Fil: Areta, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; ArgentinaFil: Juhant, Matias Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentin
Diseños de parches de material compuesto mediante un algoritmo de optimización topológica
No full textTradicionalmente, la rehabilitación de las estructuras metálicas afectadas por alguna patología que pone en riesgo su vida en servicio se realiza empleado distintas técnicas de reparación, como soldadura, atornillado de parches o refuerzos de placas de acero. No obstante, en los últimos años se ha extendido el uso parches adheridos de materiales compuestos, para llevar a cabo reparaciones en componentes dañados. Típicamente, la metodología empleada para el diseño de estos parches de material compuesto se basa en procesos iterativos, donde se adoptan arbitrariamente parches con distinta geometría y se verifica la estabilidad de la fisura en cada caso. Sin embargo, este proceso de diseño no garantiza que la forma del parche sea la óptima, sino que permite establecer comparativamente la eficiencia de una configuración determinada en relación con otra. En el presente trabajo se ha propuesto un algoritmo de optimización topológica aplicado a materiales ortótropos. Con el objetivo de evaluar la capacidad del modelo se ha analizado el caso práctico de un componente mecánico, fisurado y reparado con parches de material compuesto, solicitado a distintos tipos de cargas. Los resultados obtenidos se han comparado con estudios paramétricos llevados a cabo por otros autores. Este análisis comparativo ha permitido evidenciar el potencial del algoritmo desarrollado para ser aplicado al diseño eficiente de parches de material compuesto.Fil: Braun, Matias Nicolas. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Construcciones; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Villa, Edgardo Ignacio. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Construcciones; ArgentinaFil: Rocco, Claudio Guillermo. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Construcciones; Argentina1st Iberic Conference on Theoretical and Experimental Mechanics and Materials & 11th National Congress on Experimental MechanicsPortoPortugalUniversidade do Porto. Faculdade de Engenharia. Instituto de Ciência e Inovação em Engenharia Mecânica e Gestão Industria
Numerical modeling of the oedometrical behavior of Collapsible Loess
No full textLoess covers more than 10% of continental lands all around the world. The macrostructure of these soils collapses when water content increases, greatly decreasing soil volume. Two mechanisms are responsible for the collapse: the expansion of clay bridges and/or the dissolution of precipitated salts that join coarse particles forming an open microstructure. Double oedometer tests are widely used in geotechnical practice to estimate relative collapse or collapse potential. The main goal of this work is to evaluate the stress–strain behavior under zero-lateral displacement conditions of undisturbed loess samples tested at natural moisture content and inundated with water. Numerical models are developed by using the Comsol Multiphysics Software. Two elastoplastic models were implemented: the modified Cam Clay model (MCC) and the extended Barcelona Basic model (EBB). Numerical models were calibrated with experimental data by using a least square technique. The results show the capacity and limitations of the MCC and EBB models to represent the mechanical behavior of collapsible loess before and after water flooding. This work demonstrates the potential of the EBB model to predict the mechanical behavior of loess, using a limited amount of data obtained from uncontrolled-suction oedometer tests.Fil: Giomi, Ignacio. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Estudios Avanzados en Ingeniería y Tecnología. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Estudios Avanzados en Ingeniería y Tecnología; ArgentinaFil: Francisca, Franco Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Estudios Avanzados en Ingeniería y Tecnología. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentin
Tectonostratigraphic significance of the neogene sedimentary record of northwestern Austral-Magallanes Basin, Argentinean Patagonia
No full textDespite their geodynamic significance, the stratigraphy and paleoenvironments of the lower-middle Miocene clastic deposits, genetically related to subductiondriven lithospheric processes at the latitude of the Chile Triple Junction are poorly known. These beds, outcropping along the foothills of the Southern Patagonian Andes in the northwestern edge of the Austral-Magallanes Basin, include the marine Centinela Formation transitionally covered by the continental Río Zeballos Group. The aim of this work is to present an integrated stratigraphic section and to discuss its paleoenvironmental evolution, based on facies analysis. We inquired into possible tectonic-drivers during continentalization including a short extensional episode affecting the basal Miocene sequences associated to the initial stages of the Andean uplift. We measured a 980 m-thick succession, subdivided into three sedimentary units (SU I, SU II and SU III). The lower SU I is dominated by shallow marine, bioturbated sandstones and heterolithic deposits. SU II is dominated by interbedded medium- to pebbly-grained cross-stratified sandstones and mudstones, interpreted as fluvial channels and floodplains with incipient paleosols. Following, SU II shows a clear upward increase in the sandstone/mudstone ratio. Topping the sequences, SU III is composed of structurless and cross-bedded conglomerates interbedded with coarse-grained sandstones, interpreted as channel and sheet-flood deposits within an alluvial fan. The whole coarsening upward trend, from shallow marine to fluvial and finally to alluvial fan deposits, suggests that these deposits were influenced by a progressive reduction in accommodation space. The sequence is covered by basalts, truncated by a regional relictic surface composed of terrace conglomerates of the Rodados Patagónicos , reflecting basin abandonment and generation of a bypass surface during the late Miocene-Quaternary. Based on our results, published U-Pb detrital ages, and thermochronological data, we relate the evolution of the Neogene sedimentary systems to a synchronous contraction-related eastward migration of the deformation front of the adjacent Andean orogenic belt, followed by neutral tectonics.Fil: Aramendía, Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; ArgentinaFil: Cuitiño, José Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; ArgentinaFil: Ghiglione, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Bouza, Pablo Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentin
Crop species transferability of G-SSR and EST-SSR markers to Neltuma affinis spreng
No full textAim of study: To examine the transferability of G-SSR (genomic simple sequence repeats) and EST-SSR (expressed sequence tag simple sequence repeats) markers developed for several Neltuma species to N. affinis, a species with no genomic data.
Area of study: West-Center of Entre Ríos province, Argentina. The set of molecular markers here proposed can be used to analyze samples from the entire species’ distribution range.
Material and methods: Twenty-five genomic G-SSRs and eleven EST-SSRs from multiple species were amplified in thirty N. affinis genotypes. Polymorphism, discrimination power and possible deviations from Hardy-Weinberg equilibrium were assessed.
Main results: Seventeen highly polymorphic G-SSRs were successfully transferred to N. affinis, with a PIC (polymorphic information content) average value of 0.811 and a He (expected heterozygosity) average value of 0.694; thirteen were validated, showing very low frequencies of null alleles and no linkage disequilibrium. Additionally, seven polymorphic EST-SSRs were transferred. As expected, PIC and He average values were low. Six out of seven markers were validated, and very low frequencies of null alleles and no linkage disequilibrium were observed.
Research highlights: This work provides information on the levels of microsatellites’ cross transferability to N. affinis, and its polymorphism degree. Two sets of polymorphic SSRs (genomic and expressed) to study the genetic status of the species are proposed.Instituto de Recursos BiológicosFil: Soldati, María Cristina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; ArgentinaFil: Gavier Pizarro, Gregorio Ignacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; ArgentinaFil: Morales, Matias. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Morón. Facultad de Agronomía y Ciencias Agroalimentarias; ArgentinaFil: Pomponio, Maria Florencia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; ArgentinaFil: Zelener, Noga. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro de Investigación de Recursos Naturales; Argentin
Author Correction: Lossy mode resonance sensors based on lateral light incidence in nanocoated planar waveguides (Scientific Reports, (2019), 9, 1, (8882), 10.1038/s41598-019-45285-x)
No full textPublisher Copyright: © 2020, The Author(s).Three supplementary files containing Visualizations S1-S3 were omitted from the original version of this Article. This has been corrected in the HTML version of the Article; the PDF version was correct at the time of publication
SIBO21 collection of SYNOP reports available from SLLP (LA PAZ/ALTO) at 15 and 21 UTC
No full text---- The bulletin collects SYNOP reports:
FM 12 (SYNOP, Report of surface observation from a fixed land station).
(Refer to WMO No.306 - Manual on Codes for the definition of WMO international codes)
---- The SIBO21 TTAAii Data Designators decode (2) as:
T1 (S): Surface data.
T2 (I): Intermediate synoptic hour.
A1A2 (BO): Bolivia.
(2: Refer to WMO No.386 - Manual on the GTS - Attachment II.5)
---- The bulletin collects reports from stations:
Ascencion de guarayos, San javier, Concepcion, San ignacio de velasco, San matias, Cochabamba, Viru-viru, Santa cruz/el trompillo, San jose de chiquitos, Vallegrande, Robore, Puerto suarez, Sucre, Potosi, Monteagudo, Camiri, Villamontes, Yacuiba, Bermejo and Tarij
SMBO02 collection of SYNOP reports available from SLLP (LA PAZ/ALTO) at 12 and 18 UTC
No full text---- The bulletin collects SYNOP reports:
FM 12 (SYNOP, Report of surface observation from a fixed land station).
(Refer to WMO No.306 - Manual on Codes for the definition of WMO international codes)
---- The SMBO02 TTAAii Data Designators decode (2) as:
T1 (S): Surface data.
T2 (M): Main synoptic hour.
A1A2 (BO): Bolivia.
(2: Refer to WMO No.386 - Manual on the GTS - Attachment II.5)
---- The bulletin collects reports from stations:
Ascencion de guarayos, San javier, Concepcion, San ignacio de velasco, San matias, Cochabamba, Viru-viru, Santa cruz/el trompillo, San jose de chiquitos, Vallegrande, Robore, Sucre, Puerto suarez, Potosi, Monteagudo, Camiri, Villamontes, Yacuiba, Bermejo and Tarij
- …
