N=2 Supergravity Lagrangian Coupled to Tensor Multiplets with Electric and Magnetic Fluxes

We derive the full N=2 supergravity Lagrangian which contains a symplectic invariant scalar potential in terms of electric and magnetic charges. As shown in reference [1], the appearance of magnetic charges is allowed only if tensor multiplets are present and a suitable Fayet-Iliopoulos term is included in the fermion transformation laws. We generalize the procedure in the quoted reference by adding further a Fayet-Iliopoulos term which allows the introduction of electric charges in such a way that the potential and the equations of motion of the theory are symplectic invariant. The theory is further generalized to include an ordinary electric gauging and the form of the resulting scalar potential is given.Comment: 1+34 pages LaTeX, correction of a typo in the ungauged scalar potentia

Supersymmetric Fluid Dynamics

Recently Navier-Stokes (NS) equations have been derived from the duality between the black branes and a conformal fluid on the boundary of AdS_5. Nevertheless, the full correspondence has to be established between solutions of supergravity in AdS_5 and supersymmetric field theories on the boundary. That prompts the construction of NS equations for a supersymmetric fluid. In the framework of rigid susy, there are several possibilities and we propose one candidate. We deduce the equations of motion in two ways: both from the divergenless condition on the energy-momentum tensor and by a suitable parametrization of the auxiliary fields. We give the complete component expansion and a very preliminary analysis of the physics of this supersymmetric fluid.Comment: 24 pages, Latex2

Torsion formulation of gravity

We make it precise what it means to have a connection with torsion as solution of the Einstein equations. While locally the theory remains the same, the new formulation allows for topologies that would have been excluded in the standard formulation of gravity. In this formulation it is possible to couple arbitrary torsion to gauge fields without breaking the gauge invariance.Comment: AMS-LaTeX, 25 pages. Appendices have been eliminated and the necessary concepts have been inroduced in the text. We have added some reference

Educazione terapeutica ai malati oncologici: esperienza degli infermieri italiani

Introduction. Therapeutic patient’ education is a complex process requiring a proper level of communication between the patient and the healthcare professional. Nurses play a key role in providing the patients and their families with educational activities. Objective: This paper is the report of a study which investigates the experiences of some Italian nurses with regards to their role in therapeutic education to cancer patients. Methods: Qualitative research. Semi-structured interviews were carried out with 52 nurses working in different Local Health Service Units of two northern Italy regions: Piedmont and Valle d’Aosta. To identify categories and items arising from the data, the researchers used a qualitative content analysis. Results: The interview format was classified into six main categories: a) Patient education as daily care activity; b) Relevance of communication and dialogue for educational purposes; c) Relative usefulness of written information; d) Therapeutic education recording; e) Patients’ feedbacks as a tool for assessing therapeutic education; and f) Difficult communication. Conclusions: The experience of nurses in terms of their professional role in therapeutic education for cancer patients shows the steady presence of educational activities carried out in a non-planned way. This research confirms the need to launch educational interventions for nurses. Implications for Practice: It is essential to implement an action plan to promote opportunities of professional training in the field since among the most frequent reasons for project failure in therapeutic education is the lack of expert human resource

Dust temperature in {ALMA} [C~ii]-detected high-z galaxies

At redshift z > 5, the far-infrared (FIR) continuum spectra of main-sequence galaxies are sparsely sampled, often with a single data point. The dust temperature T-d(,SED), thus has to be assumed in the FIR continuum fitting. This introduces large uncertainties regarding the derived dust mass (M-d), FIR luminosity, and obscured fraction of the star formation rate. These are crucial quantities to quantify the effect of dust obscuration in high-z galaxies. To overcome observation limitations, we introduce a new method that combines dust continuum information with the overlying [C II] 158 mu m line emission. By breaking the M-d T-d(,SED) degeneracy, with our method, we can reliably constrain the dust temperature with a single observation at 158 mu m. This method can be applied to all Atacama Large Millimeter Array (ALMA) and NOEMA [C II] observations, and exploited in ALMA Large Programs such as ALPINE and REBELS targeting [C II] emitters at high-z. We also provide a physical interpretation of the empirical relation recently found between molecular gas mass and [C II] luminosity. We derive an analogous relation linking the total gas surface density and [C II] surface brightness. By combining the two, we predict the cosmic evolution of the surface density ratio Sigma(H2) / Sigma(gas). We find that Sigma(H2)/ Sigma(gas) slowly increases with redshift, which is compatible with current observations at 0 < z < 4

Warm dust in high-z galaxies: origin and implications

ALMA observations have revealed the presence of dust in galaxies in the Epoch of Reionization (redshift $z>6$). However, the dust temperature, $T_d$, remains unconstrained, and this introduces large uncertainties, particularly in the dust mass determinations. Using an analytical and physically-motivated model, we show that dust in high-$z$, star-forming giant molecular clouds (GMC), largely dominating the observed far-infrared luminosity, is warmer ($T_d > 60\ \mathrm{K}$) than locally. This is due to the more compact GMC structure induced by the higher gas pressure and turbulence characterizing early galaxies. The compactness also delays GMC dispersal by stellar feedback, thus$\sim 40\%$of the total UV radiation emitted by newly born stars remains obscured. A higher$T_d$has additional implications: it (a) reduces the tension between local and high-$z$IRX-$\beta$ relation, (b) alleviates the problem of the uncomfortably large dust masses deduced from observations of some EoR galaxies.Comment: 14 pages, 6 figures, accepted for publication in MNRA

Pure Spinor Integration from the Collating Formula

We use the technique developed by Becchi and Imbimbo to construct a well-defined BRST-invariant path integral formulation of pure spinor amplitudes. The space of pure spinors can be viewed from the algebraic geometry point of view as a collection of open sets where the constraints can be solved and a free independent set of variables can be defined. On the intersections of those open sets, the functional measure jumps and one has to add boundary terms to construct a well-defined path integral. The result is the definition of the pure spinor integration measure constructed in term of differential forms on each single patch.Comment: 22 page