Estimación de emisiones de co2 en suelo cultivado con zea mays en el rancho “la palma”, municipio de temoaya Estado de México

El suelo agrícola con producción de Zea mayz es un emisor de dióxido de carbono (CO)2 que ha sido poco estudiado en México, y es necesario implementar estudios que permitan conocer la contribución del suelo en la emisión de CO2, por ello esta investigación se enfoca en estimar las emisiones de dicho gas en un suelo cultivado con maíz en el Rancho "La Palma", municipio de Temoaya, Estado de México

Liftings of Nichols algebras of diagonal type I. cartan type A

After the classification of the finite-dimensional Nichols algebras of diagonal type[17,18], the determination of its defining relations[7,6], and the verification of the generation in degree-s1 conjecture[6], there is still one step missing in the classification of complex finite-dimensional Hopf algebras with abelian group, without restrictions on the order of the latter: The computation of all deformations or liftings. A technique towards solving this question was developed in[5], built on cocycle deformations. In this paper, we elaborate further and present an explicit algorithm to compute liftings. In our main result we classify all liftings of finite-dimensional Nichols algebras of Cartan type A, over a cosemisimple Hopf algebra H. This extends[2], where it was assumed that the parameter is a root of unity of order >3 and that H is a commmutative group algebra. When the parameter is a root of unity of order 2 or 3, new phenomena appear: The quantum Serre relations can be deformed; this allows in turn the power root vectors to be deformed to elements in lower terms of the coradical filtration, but not necessarily in the group algebra. These phenomena are already present in the calculation of the liftings in type A2 at a parameter of order 2 or 3 over an abelian group[11,19], done by a different method using a computer program. As a byproduct of our calculations, we present new infinite families of finite-dimensional pointed Hopf algebras.Fil: Andruskiewitsch, Nicolas. 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; ArgentinaFil: Angiono, Iván Ezequiel. 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; ArgentinaFil: Garcia Iglesias, Agustin. 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; Argentin

Venezuela and China:Independency and Dependency in the Context of Interdependent Hegemony

In a world order without a sole hegemon, the dialectic relationship between the main global players and emerging powers enables nation-states to strategically favor their national interests as well as mutually beneficial alliances, whilst the multipolar world becomes strengthened. This article draws on this context of 'interdependent hegemony' to explore the existing relationship between Venezuela, as a swing state, and China, as one of the Big Three global powers. Particularly, I focus on Venezuelan efforts to develop, at the domestic and regional level, a counterhegemonic political project against the US and how China is considered a valuable ally to acquire more independence. However, this situation of interdependence can paradoxically lead to a new kind of dependence, in this case on China. To analyze these relations, I propose a conceptual framework consisting of three dimensions: 1) the international positioning towards other Northern and Southern countries and whether the relationship is conceived in terms of conflict or cooperation; 2) the economic model and how it conditions the relationship between countries and whether relationships or dependence are generated; and 3) the development of a political and economic model which can inspire or be followed by other countries. Although China's influence and increasing power in Venezuela is unquestionable in economic terms, the Venezuelan government uses its agreements with China strategically to legitimate its policies, in the name of a South-socialist alternative, and to reaffirm its international positioning