Simple Records Matching Method for diagnostic and clinical datasets of patient’s records

Several statistical packages, either commercials or open-source, provide many methods for multi-factorial and discriminant analysis; such a software is poorly used by physicians. Appropriate models and tests have to be used pending on the kind of experiment scheme, adequate distribution assumption are needed for variables and parameters and proper data validation have to be verified for historical records. These are but a few of many critical aspects for a robust and trustable data interpretation needed in the Evidence Based Medicine era. Clinicians always wish to be able to quickly interpreter diagnostic records to discriminate, or alternatively correlate, coherent groups of patient’s records according to either descriptive characters or variable units. Practically, patient’s records are stored in spread-sheet or database which change pending on the clinical trial scope; moreover, data entry and its validation is usually poor, hence physician are used to send raw-data to the statistician without contributing, for instance, with parametric and non-parametric indication on usable distribution. We address this problem by introducing a simple “weighted” model approached with the Unique Factorisation Domain theory: records can be compare by matching each other through a score overlap and clinician can modulate tolerance of closeness stringency criteria. An intuitive paradigm of records matching method (RMM) is presented and discussed with example, computational design and programming prototyping model; freely available material concerning real-world application, are also provided by the authors

Formation of Nanotwin Networks during High-Temperature Crystallization of Amorphous Germanium

Germanium is an extremely important material used for numerous functional applications in many fields of nanotechnology. In this paper, we study the crystallization of amorphous Ge using atomistic simulations of critical nano-metric nuclei at high temperatures. We find that crystallization occurs by the recurrent transfer of atoms via a diffusive process from the amorphous phase into suitably-oriented crystalline layers. We accompany our simulations with a comprehensive thermodynamic and kinetic analysis of the growth process, which explains the energy balance and the interfacial growth velocities governing grain growth. For the $\langle111\rangle$ crystallographic orientation, we find a degenerate atomic rearrangement process, with two zero-energy modes corresponding to a perfect crystalline structure and the formation of a $\Sigma3$ twin boundary. Continued growth in this direction results in the development a twin network, in contrast with all other growth orientations, where the crystal grows defect-free. This particular mechanism of crystallization from amorphous phases is also observed during solid-phase epitaxial growth of $\langle111\rangle$ semiconductor crystals, where growth is restrained to one dimension. We calculate the equivalent X-ray diffraction pattern of the obtained nanotwin networks, providing grounds for experimental validation

Total correlations as fully additive entanglement monotones

We generalize the strategy presented in Refs. [1, 2], and propose general conditions for a measure of total correlations to be an entanglement monotone using its pure (and mixed) convex-roof extension. In so doing, we derive crucial theorems and propose a concrete candidate for a total correlations measure which is a fully additive entanglement monotone.Comment: 8 pages, 3 figures. Title changed, new result

NUT-like generalization of axisymmetric gravitational fields

The complex potential formulation of the axisymmetric problem discussed by Ernst enables us to construct new solutions from a given one, by multiplying the corresponding potential by a unit complex number. This rotation introduces naturally the NUT parameter in the metric. The generalized Kerr, Weyl, and Tomimatsu-Sato solutions are explicity constructed. Copyright \ua9 1975 American Institute of Physics

Some properties and problems of accretion disks about Kerr naked singularities

Disk accretion onto a Kerr naked singularity is investigated by examining the stable circular equatorial orbits of a test particle in a Kerr background. It is assumed that there is a mechanism (e.g., viscous stress) at large radii that disperses energy and transfers angular momentum outward and mass inward, while maintaining the accretion flow in quasi-geodesic circular orbits. The results obtained show that: (1) the radius and energy of the last stable orbit increase as the ratio of the angular-momentum density and mass (a/M) of the naked singularity increases; (2) for a/M less than the square root of (32/27) there is a region where the energy becomes negative, suggesting that more energy than the mass-energy of a test particle can be extracted; (3) pathologies related to the definition of positive and negative energy states exist for a/M between unity and the square root of (32/27); and (4) the entire mass-energy of a test particle can be extracted for a/M equal to the square root of (32/27)

Caratterizzazione idrogeologica preliminare della Valle dei Templi

Nei bacini idrografici ai quali afferisce il territorio di Agrigento si rinvengono oltre 20 sorgenti di un certo interesse, per una portata complessiva di circa 30 l/s. Alcune di queste, caratterizzate dalle migliori caratteristiche organolettiche, erano già utilizzate dall'antichità nei pressi della Valle dei Templi. La rete di cunicoli ipogea, realizzata a fini di approwigionamento idrico circa 2500 anni fa, ai nostri giorni drena anche, per la scarsa coscienza ambientale di pochi o per scarsa efficienza della rete fognante, acque reflue. I cunicoli costituirono un acquedotto sotterraneo, realizzato interamente in scavo nei termini acquiferi della successione pliopleistocenica, che servì l'antico abitato di Akragas, che secondo alcune stime, ritenute prudenziali, raggiunse una popolazione di 200.000 abitanti. La risorsa idrica distribuita era allo stesso tempo drenata, molto efficacemente, dai corpi acquiferi attraversati. Oggi possiamo stimare la portata equivalente alla piovosita efficace media annua e pari a 17 l/s