Cardiovascular Attributable Risk and Risk Factors Evaluations as a Matter of Statistics and Data Mining Confluences

Cardiovascular diseases represent a severe threat for humanity, being the first cause of death and hospitalization in both genders. An impressive number of studies have been developed in order to identify a set of factors causing this kind of illness, but only few of them were able to pay significant resources in analyzing large population samples (tens of thousands) and for longer periods of time (decades). This paper’s objective is to continue the previous researches of the eProCord project and to validate with concrete data the theoretical model developed for the attributable risk (AR). It will consider the same risk factors for myocardial infarction identified by INTERHEART study and the same work hypothesis. We will also evaluate if a certain value of the AR is also confirmed by the invoked disease of the patient. Using statistical and data mining tools we will investigate the prediction potential of the chosen factors and the opportunity to extend them in order to capture any cardiovascular disease. The empirical tests rely for now on a sample of 236 patients.Cardiovascular Disease, Myocardial Infarction, Attributable Risk, Roc, Data Mining, Classification

Distortion of Wigner molecules : pair function approach

We considered a two dimensional three electron quantum dot in a magnetic field in the Wigner limit. A unitary coordinate transformation decouples the Hamiltonian (with Coulomb interaction between the electrons included) into a sum of three independent pair Hamiltonians. The eigen-solutions of the pair Hamiltonian provide a spectrum of pair states. Each pair state defines the distance of the two electrons involved in this state. In the ground state for given pair angular momentum $m$, this distance increases with increasing $|m|$. The pair states have to be occupied under consideration of the Pauli exclusion principle, which differs from that for one-electron states and depends on the total spin $S$ and the total orbital angular momentum $M_L=\sum m_i$ (sum over all pair angular momenta). We have shown that the three electrons in the ground state of the Wigner molecule form an equilateral triangle (as might be expected) only, if the state is a quartet ($S=3/2$) and the orbital angular momentum is a magic quantum number ($M_L=3 m ; m=$ integer). Otherwise the triangle in the ground state is isosceles. For $M_L=3 m+1$ one of the sides is longer and for $M_L=3 m-1$ one of the sides is shorter than the other two

Analytical solution to the Schrodinger equation of a laser-driven correlated two-particle system

The time-dependent quantum system of two laser-driven electrons in a harmonic oscillator potential is analysed, taking into account the repulsive Coulomb interaction between both particles. The Schrodinger equation of the two-particle system is shown to be analytically soluble in case of arbitrary laser frequencies and individual oscillator frequencies, defining the system. Quantum information processing could be a possible field of applicationComment: 5 page

Analytic Solution of a Relativistic Two-dimensional Hydrogen-like Atom in a Constant Magnetic Field

We obtain exact solutions of the Klein-Gordon and Pauli Schroedinger equations for a two-dimensional hydrogen-like atom in the presence of a constant magnetic field. Analytic solutions for the energy spectrum are obtained for particular values of the magnetic field strength. The results are compared to those obtained in the non-relativistic and spinless case. We obtain that the relativistic spectrum does not present s states.Comment: RevTeX, 8 pages, to be published in Phys. Lett.

In between crystalline and transparent. The skyscraper in Friedrichstrasse by Mies Van der Rohe

[EN] Crystalline qualities of glass were very appreciated by Expressionism. Some years later, transparency became a keystone for the Modern Movement. Mies van der Rohe drew his entry for the Friedrichstrasse Competition in 1921, in a moment of transition between both architectonical movements. The aim of this article is to show how the graphic documents made by Mies exemplify this change of tendency. His representation of the glazed enclosure evolves from opaque reflection to a partial transparency that shows the inner structure. This process confirms the importance of structural conception for the architectural form. These drawings show the beginning of a new poetic of transparency, for its author as for Modernism.[ES] Los arquitectos expresionistas apreciaron el simbolismo cristalino del vidrio. Unos años más tarde el Movimiento Moderno ensalzó su transparencia. Mies van der Rohe dibuja su propuesta para el concurso de Rascacielos en la Friedrichstrasse en 1921, en un momento de transición entre ambas corrientes arquitectónicas. El objetivo de este artículo es analizar la documentación gráfica elaborada por Mies como ejemplo de este cambio de tendencia. Su representación del cierre acristalado evoluciona desde el reflejo casi opaco hacia una transparencia parcial que hace visible la estructura interior. Este proceso confirma la importancia de la concepción estructural de la forma arquitectónica. Estos dibujos muestran el principio de una poética de lo trasparente, tanto para su autor como para la arquitectura moderna.Resano Resano, D. (2017). Entre lo cristalino y lo transparente. El rascacielos en la Friedrichstrasse de Mies van der Rohe. EGA. Revista de Expresión Gráfica Arquitectónica. 22(31):132-139. doi:10.4995/ega.2017.3507SWORD1321392231Drexler, A. & schulze, F. (1986) The Mies van der Rohe Archive, New York, Garland.Neumeyer, F. (1995) The Artless Word: Mies van der Rohe on the Building Art. From the Spanis Edition: La palabra sin artificio, Madrid, El Croquis.Scheerbart, P. (1914) Glassarchitectur. From the edition in Spanish: (1998) La arquitectura de cristal, Murcia Colegio Oficial de Aparejadores y Arquitectos Técnicos.Taut, B. (1922a) without tittle. Frühlicht, 3, 84-85.Taut, B. (1922b) Ludwig Mies van der Rohe. Hochhaus. Frühlicht, 4, 122-124.Tegethoff, W. (1985). The Villas and Country Houses. Nueva York, MOMA

Violation of non-interacting V\cal V-representability of the exact solutions of the Schr\"odinger equation for a two-electron quantum dot in a homogeneous magnetic field

We have shown by using the exact solutions for the two-electron system in a parabolic confinement and a homogeneous magnetic field [ M.Taut, J Phys.A{\bf 27}, 1045 (1994) ] that both exact densities (charge- and the paramagnetic current density) can be non-interacting $\cal V$-representable (NIVR) only in a few special cases, or equivalently, that an exact Kohn-Sham (KS) system does not always exist. All those states at non-zero $B$ can be NIVR, which are continuously connected to the singlet or triplet ground states at B=0. In more detail, for singlets (total orbital angular momentum $M_L$ is even) both densities can be NIVR if the vorticity of the exact solution vanishes. For $M_L=0$ this is trivially guaranteed because the paramagnetic current density vanishes. The vorticity based on the exact solutions for the higher $|M_L|$ does not vanish, in particular for small r. In the limit $r \to 0$ this can even be shown analytically. For triplets ($M_L$ is odd) and if we assume circular symmetry for the KS system (the same symmetry as the real system) then only the exact states with $|M_L|= 1$ can be NIVR with KS states having angular momenta $m_1=0$ and $|m_2|=1$. Without specification of the symmetry of the KS system the condition for NIVR is that the small-r-exponents of the KS states are 0 and 1.Comment: 18 pages, 4 figure