Boosting business with data analysis

__Abstract__ Pretty much every modern organisation collects a mountain of data on a daily basis as it goes about its business. But all that data is of little real value unless it is properly analysed and used to anticipate client behaviour and needs

Model independent study of the Dirac structure of the nucleon-nucleon interaction

Relativistic and non-relativistic modern nucleon-nucleon potentials are mapped on a relativistic operator basis using projection techniques. This allows to compare the various potentials at the level of covariant amplitudes were a remarkable agreement is found. In nuclear matter large scalar and vector mean fields of several hundred MeV magnitude are generated at tree level. This is found to be a model independent feature of the nucleon-nucleon interaction.Comment: 5 pages, 2 figures, results for V_lowk added, to appear in PR

Relativistic nucleon optical potentials with isospin dependence in Dirac Brueckner Hartree-Fock approach

The relativistic optical model potential (OMP) for nucleon-nucleus scattering is investigated in the framework of Dirac-Brueckner-Hartree-Fock (DBHF) approach using the Bonn-B One-Boson- Exchange potential for the bare nucleon-nucleon interaction. Both real and imaginary parts of isospin-dependent nucleon self-energies in nuclear medium are derived from the DBHF approach based on the projection techniques within the subtracted T -matrix representation. The Dirac potentials as well as the corresponding Schrodinger equivalent potentials are evaluated. An improved local density approximation is employed in this analysis, where a range parameter is included to account for a finite-range correction of the nucleon-nucleon interaction. As an example the total cross sections, differential elastic scattering cross sections, analyzing powers for n, p + 27Al at incident energy 100 keV < E < 250 MeV are calculated. The results derived from this microscopic approach of the OMP are compared to the experimental data, as well as the results obtained with a phenomenological OMP. A good agreement between the theoretical results and the measurements can be achieved for all incident energies using a constant value for the range parameter.Comment: 10 pages, 16 figure

LA PROBLEMÁTICA CHANKA: ANÁLISIS SOCIOPOLÍTICO DE LAS SOCIEDADES TARDÍAS DE LA SIERRA CENTRO SUR ANDINA

Se presenta un panorama sobre la arqueología prehispánica tardía de la sierra centro sur peruana, territorio comúnmente denominado como “Chanka”, en el cual se desarrollaron numerosas entidades sociopolíticas; algunas enfrentadas entre sí, mientras que otras interactuaban social y culturalmente. El Tawantinsuyu conquistó estos territorios tras la derrota de los Chankas en el Cusco, para lo cual algunos de los vecinos de los Chankas (como los quichuas), se aliaron al expansivo estado cusqueño. En base a la revisión de los datos, el territorio de desarrollo de los Chankas fue la actual provincia de Andahuaylas y no la actual región de Ayacucho.It presents a view on the prehispanic archeology of the Peruvian southeastern center, commonly called “Chanka”, in which numerous socio-political entities were developed; Some facing each other, while others interacted socially and culturally. The Tawantinsuyu conquered these territories after the defeat of the Chankas in Cusco, for which some of the neighbors of the Chankas (like the Quichuas), allied themselves with the expansive state cusqueño. Based on the review of the data, the development territory of the Chankas was the present province of Andahuaylas and not the current region of Ayacucho