A arte de si: uma análise da ascese nas comunidades alternativas

In this research, we studied alternative communities that promote self-care practices, as well as environmental and community care.We problematized if there are ascetical practices in these communities - understanding asceticism from Ortega (2008) and Foucault (2006, 2009, 1998), which would be a transition from one type of subjectivity to another one to be achieved through exercises on itself, in other words, the ascetic oscillates between a refused identity to another to be drawn by an art that focuses itlself.This research was conducted through the analysis of files, observations of daily practices and interviews with open questions in order to achieve reflections and thoughts of the residents of alternative communities.For our study, we chose the Alternative Community of Campina, located in the Capon Valley/Bahia; Sabiaguaba community, located in Fortaleza-CE; and the National Meeting of Alternative Communities (ENCA). The research points to ways of living that create new subjectivities, in which the subject feels responsible for taking care of themselves, others and the environment

Propriedades físicas de bicamadas magnéticas

The magnetic order of bylayers composed by a ferromagnetic film (F) coupled with an antiferromagnetic film (AF) is studied. Piles of coupled monolayers describe the films and the interfilm coupling is described by an exchange interaction between the magnetic moments at the interface. The F has a cubic anisotropy while the AF has a uniaxial anisotropy. We analyze the effects of an external do magnetic field applied parallel to the interface. We consider the intralayer coupling is strong enough to keep parallel all moments of the monolayer an then they are described by one vector proportional to the magnetization of the layer. The interlayer coupling is represented by an exchange interaction between these vectors. The magnetic energy of the system is the sum of the exchange. Anisotropy and Zeeman energies and the equilibrium configuration is one that gives the absolute minimum of the total energy. The magnetization of the system is calculated and the influence of the external do field combined with the interfilm coupling and the unidirectional anisotropy is studied. Special attention is given to the region near of the transition fields. The torque equation is used to study dynamical behavior of these systems. We consider small oscillations around the equilibrium position and we negleet nonlinear terms to obtain the natural frequencies of the system. The dependence of the frequencies with the external do field and their behavior in the phase transition region is analized