Polarization of GRB Prompt Emission

We review the recent observational results of the gamma-ray linear polarization of Gamma-Ray Bursts (GRBs), and discuss some theoretical implications for the prompt emission mechanism and the magnetic composition of GRB jets. We also report a strict observational verification of CPT invariance in the photon sector as a result of the GRB polarization measurements.Comment: 13 pages, 5 figures, 7th Huntsville Gamma-Ray Burst Symposium, GRB 2013: paper 45 in eConf Proceedings C130414

On the Kaehler rank of compact complex surfaces

Harvey and Lawson introduced the Kaehler rank and computed it in connection to the cone of positive exact currents of bidimension (1,1) for many classes of compact complex surfaces. In this paper we extend these computations to the only further known class of surfaces not considered by them, that of Kato surfaces. Our main tool is the reduction to the dynamics of associated holomorphic contractions

A note on the cone of mobile curves

S. Boucksom, J.-P. Demailly, M. Paun and Th. Peternell proved that the cone of mobile curves ME(X) of a projective complex manifold X is dual to the cone generated by classes of effective divisors and conjectured an extension of this duality in the Kaehler set-up. We show that their conjecture implies that ME(X) coincides with the cone of integer classes represented by closed positive smooth (n-1,n-1)-forms. Without assuming the validity of the conjecture we prove that this equality of cones still holds at the level of degree functions

EUROPEAN MONETARY UNION AND ROMANIA

Romania face the question of whether and in what time frame the economy will be capable of fulfilling the conditions for entering into the euro area. In general, those conditions can be understood as attaining such parameters in various fields of economic life that will ensure successful operation of the economy in the environment of the single monetary policy of the European Central Bank. This article analyzes the main issues of the euro adoption in Romania. In the medium term, an important challenge for Romania is to achieve real and nominal convergence. Within this framework, the Eurosystem emphasizes the need to perform real convergence in parallel with and not on the behalf of nominal convergence. The question of optimal timing of euro adoption has to be addressed.euro adoption, convergence, Romania

Secure Architectures for Mobile Applications

The paper presents security issues and architectures for mobile applications and GSM infrastructure. The article also introduces the idea of a new secure architecture for an inter-sector electronic wallet used in payments - STP4EW (Secure Transmission Protocol for Electronic Wallet)secure architecture, m-application, smart-cards, 3G Mobile