4,185 research outputs found
Cellular covers of local groups
We prove that, in the category of groups, the composition of a cellularization and a localization functor need not be idempotent. This provides a negative answer to a question of Emmanuel Dror Farjoun.Ministerio de Educación y CienciaJunta de Andalucí
Quantum circuits: charge discreteness and resonance
In a recent article, we have advanced a semiclassical theory of quantum
circuits with discrete charge and electrical resistance. In this work, we
present a few elementary applications of this theory. For the zero resistance,
inductive circuit, we obtain the Stark ladder energies in yet another way; and
generalize earlier results by Chandia et. al, for the circuit driven by a
combination d.c. plus a.c. electromotive force (emf). As a second application,
we investigate the effect of electrical resistance, together with charge
discreteness, in the current amplitude, and resonance conditions of a general
quantum circuit, including nonlinear effects up to third order on the
external sinusoidal emf
Reseña de "LA PROFESIÓN UNIVERSITARIA EN EL CONTEXTO DE LA MODERNIZACIÓN" de Teresa Pacheco Méndez y Ángel Díaz Barriga
La lectura de este libro es una lectura obligada para los docentes, explora uno de los territorios en los que el conocimiento y sus tradicionales mecanismos institucionales de preservación (la profesión y la formación de profesionales) encaran la nueva dinámica del cambio, sobrellevando sus efectos. El principal interés de los autores es salir al encuentro de los puntos de contradicción a los que se enfrentan actualmente nuestras instituciones universitarias, que asumen la elevada responsabilidad de generar conocimiento y de formar sujetos sociales, con la perspectiva de ganar terreno a la fragmentación y a la segmentación de la vida institucional, producto de la modernización
An esp manual course for waiting staff: needs analysis and development
"Nowadays, relationships with English speaking countries force to any employee to
develop social, cultural and even technological skills that is why waiters have to develop
an intermediate level of English language. In this context, English for a Specific Purpose
(ESP) becomes a very important area because that is exactly what the study will focus on.
Simple approach to the mesoscopic open electron resonator: Quantum current oscillations
The open electron resonator, described by Duncan et.al, is a mesoscopic
device that has attracted considerable attention due to its remarkable
behaviour (conductance oscillations), which has been explained by detailed
theories based on the behaviour of electrons at the top of the Fermi sea. In
this work, we study the resonator using the simple quantum quantum electrical
circuit approach, developed recently by Li and Chen. With this approach, and
considering a very simple capacitor-like model of the system, we are able to
theoretically reproduce the observed conductance oscillations. A very
remarkable feature of the simple theory developed here is the fact that the
predictions depend mostly on very general facts, namely, the discrete nature of
electric charge and quantum mechanics; other detailed features of the systems
described enter as parameters of the system, such as capacities and
inductances
A price model to assess the inflationary effects of the European Regional Policy
Social Accounting Matrices (SAM) are databases that complete the information provided by the input-output tables. They study the intersectorial relationships of an economy, the behaviour of consumers, the government or the foreign sector, while being able to close the income flow of rent. In this work, we deal with the European Regional Development Fund (ERDF) in Andalusia, a Spanish region classified as Objective 1 by the European Regional policy. We apply the Leontief model on the SAMs for 1990, 1995 and 1999 to get the gross output fall when we remove these regional funds. Furthermore, we develop a price model to assess the impact of this financial support on aggregate and sectorial prices.Social Accounting Matrix, Regional Accounting, Structural Analysis.
On the idempotency of some composite functors
We present examples of localization functors whose composition with
certain cellularization functors is not idempotent, and vice versa.Ministerio de Educación y Cienci
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