Massive Gravity in de Sitter Space via Gravitational Higgs Mechanism

In this paper we discuss massive gravity in de Sitter space via gravitational Higgs mechanism, which provides a nonlinear definition thereof. The Higgs scalars are described by a nonlinear sigma model, which includes higher derivative terms required to obtain the Fierz-Pauli mass term. Using the aforesaid non-perturbative definition, we address appearance of an enhanced local symmetry and a null norm state in the linearized massive gravity in de Sitter space at the special value of the graviton mass to the Hubble parameter ratio. By studying full non-perturbative equations of motion, we argue that there is no enhanced symmetry in the full nonlinear theory. We then argue that in the full nonlinear theory no null norm state is expected to arise at the aforesaid special value. This suggests that no ghost might be present for lower graviton mass values and the full nonlinear theory might be unitary for all values of the graviton mass and the Hubble parameter with no van Dam-Veltman-Zakharov discontinuity. We argue that this is indeed the case by studying full nonlinear Hamiltonian for the relevant conformal and helicity-0 longitudinal modes. In particular, we argue that no negative norm state is present in the full nonlinear theory.Comment: 22 pages, comments and references added. Phys.Rev.D versio

Jacobi Structures in R3\mathbb{R}^3

The most general Jacobi brackets in $\mathbb{R}^3$ are constructed after solving the equations imposed by the Jacobi identity. Two classes of Jacobi brackets were identified, according to the rank of the Jacobi structures. The associated Hamiltonian vector fields are also constructed

Quality management in socioeducational action

Nowadays. the quality of the services offered to citizens is of the almost importance. All public services ,ust be efficacious and excellent. The organisations and professionals who participate in socio educotiollal-action are greatly concerned with quality. Stimulating intemal qualiry management of services will boost process building and will make it possible to bring in tire necessary improvements in order to cater to social demands.En la actualidad es imprescindible plantearse la calidad de los servicios que se ofrecen a la ciudadanía. A cualquier servicio público hay que exigirle eficacia y excelencia. Organismos y profesionales que intervienen en la acción socioeducativa, tienen una gran preocupación por la calidad. Estimular la gestión de la calidad interna de los servicios potenciará el establecimiento de procesos que permitirán introducir las mejoras necesarias para dar respuestas a les demandas sociales.

About policies in intervention : institutional assignments and the responsibility of the professionals

.Los sistemas de protección social y el conjunto de servicios públicos tienen que garantizar los derechos sociales universales. El circuito de atención queda bien definido a partir de toda la normativa y la clasificación de las servicios. Se necesita una diversificación del proceso de ayuda de los recursos. La necesidad de poder ofrecer respuestas globales a problemáticas que se tienen que analizar globalmente implica defender el principio de la interdisciplinariedad. Hacen falta profesionales con una buena formación, motivación, compromiso solidaridad: una tipología adecuada de profesionales para responder a las necesidades presentes con unas buenas condiciones de trabajo.Any system for social protection , and the public services as a whole, must guarantee universal social rights . The circuit of al/ention has already been well defined by allthe service's regulations and classification. There is a need for the diversification of the aid process and resources. The need to be able to ojfer global responses 10 problems that have to be analysed globally meanS defending the principie of interdisciplinarity. There is a shortage of professionals with good training , motivation, commitment and solidarity: a suitable typology for professionals who will respond lo present day needs with good employment conditions