896 research outputs found
Biological nitrogen fixation of fabaceae in acid soils of Tabasco, Mexico
No full textLa fijación biológica de nitrógeno (FBN) es un
proceso que ocurre en la naturaleza y representa
la fuente de N más barata para los suelos ácidos
del trópico húmedo. El objetivo de este trabajo
fue cuantificar la cantidad de N fijado por cuatro
especies de fabáceas a través de técnicas
isotópicas con 15N, en un suelo de sabana
en México. Los tratamientos se establecieron
bajo un diseño de bloques completos al
azar, con cuatro repeticiones. Las variables
evaluadas fueron; biomasa fresca (BF), materia
seca (MS), número de nódulos (NN), masa
seca de nódulos (MSN), Nitrógeno total (Nt)
y Nitrógeno fijado biológicamente (Nf). Los
resultados muestran que Mucuna deerengiana L.
presentó mayor producción de BF y MS (17,50 y
5,47 Mg ha-1) así como MSN (58,79 mg planta-1)
y también mayor contenido de Nt y Nf (526,94 y
522,11 kg ha-1) respectivamente, en comparación
con Cajanus cajan L., Phaseolus lunatus L. y
Sesbania emerus L., especies que mostraron
valores bajos en dichas variables. Se concluye
que Mucuna deerengiana L. tolera bien los factores
desfavorables que predominan en los suelos
ácidos y por ello expresa una eficiencia superior
a 500 kg ha-1 de Nf; se considera adecuada para
aumentar el nivel de nitrógeno en los suelos de
sabana sin aplicar fertilizantes químicos.Biological nitrogen fixation is a process
that occurs in nature and is the cheapest
source of N for humid tropical acid soils. The
aim of this study was to quantify the amount
of N fixed by species of fabaceae through
15N isotopic techniques, in a savanna soil in
Mexico. The treatments were established under
a design of a randomized complete block, with
four replicates. The variables evaluated were:
fresh biomass (FB), dry matter (DM), nodule
number (NN), nodule dry mass (NDM), total
nitrogen (tN) and biologically fixed nitrogen (fN).
Our results show that Mucuna deerengiana L.
had higher production of FB and DM (17.50
and 5.47 Mg ha-1), NDM (58.79 mg plant-1)
and higher content of tN and fN (526.94 and
522.11 kg ha-1) respectively, compared with
Cajanus cajan L., Phaseolus lunatus L. and
Sesbania emerus L., species that showed low
values in these variables. We conclude that
Mucuna deerengiana L. tolerates unfavorable
factors prevailing in acid soils and therefore
has efficiency greater than 500 kg ha-1 fN; we
consider it appropriate to increase the level
of nitrogen in savanna soils, without applying
chemical fertilizers.Fil: Córdova-Sánchez, Samuel.
Universidad Autónoma de Chiapas (México). Centro Maya de Estudios AgropecuariosFil: Cárdenas-Navarro, Raúl.
Universidad Michoacana de San Nicolás de
Hidalgo. Instituto de Investigaciones Agropecuarias y ForestalesFil: Peña-Cabriales, Juan José.
Centro de Investigación y Estudios Avanzados (Guanajuato, México)Fil: Castelán-Estrada, Mepivoseth.
Colegio de Postgraduados (México). Campus Tabasco.Fil: Lobbit-Phellipe, Cristian.
Universidad Michoacana de San Nicolás de
Hidalgo. Instituto de Investigaciones Agropecuarias y ForestalesFil: Vera-Núñez, José Antonio.
Universidad Michoacana de San Nicolás de
Hidalgo. Instituto de Investigaciones Agropecuarias y Forestale
Observatorio de bibliometría y cienciometría USTA Métricas de autor FICHA BIBLIOMÉTRICA Cristian Fernando Tellez Piñerez
No full textInforme de las métricas de autor del Dr. Cristian Fernando Tellez Piñerez de las
publicaciones indexadas en Google Académico cuyo objetivo es entregar un insumo
para el fortalecimiento de las capacidades y potencialidades de los autores de la
Universidad Santo Tomás en el posicionamiento y visibilidad de sus publicaciones.Report of the author metrics Cristian Fernando Tellez Piñerez of the publications
indexed in Google Scholar whose objective is to provide an input for the
strengthening of the capacities and potentialities of the authors of the Santo Tomás
University in the positioning and visibility of their publications.http://unidadinvestigacion.usta.edu.c
Imports under a foreign exchange constraint
No full textThe traditional model of import behavior -- which looks only at the gross domestic product (GDP) and real import prices as explanatory variables -- failed to predict or explain the developing countries'import slumps in the early 1980's. This paper expands on a more useful model, the Hemphill, which incorporates the traditional variables (relative prices and domestic income) with the variables introduced by Hemphill (foreign exchange receipts and international reserves). Section 2 of this paper discusses the theoretical models in the present study. The traditional model, used here as a benchmark, is presented first, and is later extended to include foreign exchange constraints. Section 3 presents the empirical estimates of the general import models that include foreign constraints, and two special cases, the Hemphill and benchmark models, using pooled, cross-section time series. Section 4 concludes that policy makers must look at the policies that affect GDP and prices and the availability of foreign exchange when trying to estimate import behavior in developing countries.Economic Theory&Research,Environmental Economics&Policies,Economic Stabilization,Inequality,Geographical Information Systems
Cinématographie roumaine : visibilité et agentivité des langues minoritaires dans le film R.M.N. de Cristian Mungiu
No full textThe article addresses the visibility and agency of minority languages in Cristian Mungiu's film R.M.N.. The author explores how this film, set in a multiethnic village in Transylvania, uses linguistic diversity to reveal racial, cultural, and social tensions. The film depicts an environment where multiple languages coexist, but latent conflicts emerge, particularly with the arrival of foreign workers. These dynamics highlight issues related to racism and populism while illustrating the complexity of linguistic interactions in a multilingual society
Manifestaciones del Teatro del Absurdo en las obras de Cristian Cortez
No full textThis work presents a study of the characteristics of the Theatre of the Absurd in Latin America and in particular Ecuador, through the study of the work of the Ecuadorian author Cristian Cortez. We review the origins of the genre from the original works of its founders -such as Samuel Beckett and Eugene Ionesco in Europe- and base our analysis in the classification made by Martin Esslin in his book Theatre of the Absurd. This study pays particular attention to the conditions in which this genre developed in Latin America, the cultural, political, social and economic aspects, and the main similarities with its origins in Europe. The analysis is based on five short plays by Cristian Cortez. The contrast among these plays is analyzed from the motivations of the author to the means that he uses to fulfill his objective. Among his plays, the most outstanding elements are mainly related with women and their struggles to live their lives and fulfill their desires in Latin American society. As we will show, the plays analyzed have many of the elements that define the theatre of the absurd and make the author a perfect example of this theatrical movement in Latin America
The Non-Equilibrium Ising Model in Two Dimensions: a Numerical Study
No full textIn this paper, we study the boundary-driven ferromagnetic Ising model in two dimensions. In this non-equilibrium setting, in the low temperature region, the Ising model has phase separation in the presence of a current. We investigate, by means of numerical simulations, Kawasaki dynamics with magnetization reservoirs. The results show that, in the stationary non-equilibrium state, the Ising model may have uphill diffusion and magnetization profiles with three discontinuities. These results complement the results of a previous paper by Colangeli, Giberti, Vernia and the present author [9]. They also allow to state a full picture of the hydrodynamic limit
On Hopf algebras with triangular decomposition
No full textIn this survey, we first review some known results on the representationtheory of algebras with triangular decomposition, including the classification of the simple modules. We then discuss a recipe to construct Hopf algebras with triangular decomposition. Finally, we extend to these Hopf algebras the main results of a previous work of the author regarding projective modules over Drinfeld doubles of bosonizations of Nichols algebras and groups.Fil: Vay, Cristian Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentin
A Knowledge Graph Embeddings based Approach for Author Name Disambiguation using Literals
No full textScholarly data is growing continuously containing information about the
articles from a plethora of venues including conferences, journals, etc. Many
initiatives have been taken to make scholarly data available as Knowledge
Graphs (KGs). These efforts to standardize these data and make them accessible
have also led to many challenges such as exploration of scholarly articles,
ambiguous authors, etc. This study more specifically targets the problem of
Author Name Disambiguation (AND) on Scholarly KGs and presents a novel
framework, Literally Author Name Disambiguation (LAND), which utilizes
Knowledge Graph Embeddings (KGEs) using multimodal literal information
generated from these KGs. This framework is based on three components: 1)
Multimodal KGEs, 2) A blocking procedure, and finally, 3) Hierarchical
Agglomerative Clustering. Extensive experiments have been conducted on two
newly created KGs: (i) KG containing information from Scientometrics Journal
from 1978 onwards (OC-782K), and (ii) a KG extracted from a well-known
benchmark for AND provided by AMiner (AMiner-534K). The results show that our
proposed architecture outperforms our baselines of 8-14% in terms of the F1
score and shows competitive performances on a challenging benchmark such as
AMiner. The code and the datasets are publicly available through Github:
https://github.com/sntcristian/and-kge and
Zenodo:https://doi.org/10.5281/zenodo.6309855 respectively
Scientific signature guide of the author and the institution
No full textEs la firma que todo autor e investigador debería tener en el momento de registrar y publicar sus artículos científicos. El que siempre la registre de la misma forma en los buscadores, motores de búsqueda, bases de datos y otros le permitirá incrementar la Visibilidad, Impacto, Posicionamiento y Reconocido en las comunidades científicas.This is the signature that every author and researcher should have when registering and publishing their scientific articles. Always registering it in the same way in search engines, databases, and other applications will increase your visibility, impact, positioning, and recognition in the scientific community
A Dialogue on the Romanian Contribution to the Project of Total Theatre: Ion Sava and The Round Theatre (1944)
No full textLecturer PhD Cristian Rusu (1972) is a stage designer at the Cluj‐Napoca National Theatre and a visual artist. He teaches art history and stage design at the Faculty of Theatre and Film at Babeș‐Bolyai University, Cluj‐ Napoca. He holds a PhD from Babeș‐Bolyai University with a thesis on The Project of Total Theatre 1919‐1970 (2015). As a stage designer, he is the co‐author of several highly acclaimed, awardwinning theatre productions in national and international theater festivals. As a visual artist, he is represented by Galeria Plan B Berlin
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