Objetivo. Determinar el perfil de ácidos grasos (AG), ácido linoleico conjugado (ALC) e isómeros en leche vaca producida condiciones orgánicas sureste México. Materiales y métodos. Durante un año se colectaron 48 muestras leche, proveniente tres unidades producción (UP 1, 2 3) tanque colector (TC) del municipio Tecpatán, Chiapas (12 meses x 4 = 48), siguiendo las pautas establecidas normativida...

Let G be a graph embedded in a surface and let F be a set of even faces of G (faces bounded by a cycle of even length). The resonance graph of G with respect to F, denoted by R(G;F), is a graph such that its vertex set is the set of all perfect matchings of G and two vertices M1 and M2 are adjacent to each other if and only if the symmetric difference M1 ⊕M2 is a cycle bounding some face in F. ...

Resum En aquest article es presenta l’evolució que ha sofert recentment l’educació a distància des d’una nova perspectiva, la ciència del web, que estudia com el web ha evolucionat tecnològicament, però també socialment i organitzativament. El web, una solució tecnològica inicialment pensada per a compartir informació, és avui dia present en totes les activitats quotidianes, en qualsevol àmbit ...

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In this talk I discuss two relations between normative reasoning and formal argumentation. First I consider formal argumentation as a kind of normative reasoning. An attack of argument A on argument B is interpreted either as “either A is not accepted or B should be accepted” or as “A and B cannot both be accepted, and it is preferred to accept A over B”. The difference between the two interpre...

The processing performed by a feed-forward neural network is oft en int erpreted through use of decision hyperplanes at each layer. T he adaptation process, however, is normally explained using the picture of gradient descent of an error land scape. In thi s paper t he dynamics of t he decision hyperplanes is used as t he model of the adaptat ion process. An electro-mechanical analogy is drawn ...