1,354,946 research outputs found
A Generative System to support architectural and urban design
No full textThe work presents a system able to generate three-dimensional models of buildings, directly within a 3D geobrowser as Google EarthTM. For this purpose we have developed the prototype of a parametric application that allows the designer to handle the architectural shape by using the main constraints belong to urban regulations.
The system integrates two different research topics: modelling in geo-referenced
environment and modelling constraints. Compared to the related works (Building
Modeling within georeferenced environment), our application is the first Generative Design System based on the urban regulation. It is a Decision Support System (DDS), useful at the early stage of city planning as well as at the stage of architectural design. Some case studies are presented in order to test the Generative Design System:
the design of residential buildings in an Italian city
Asimetrías en el tablero comunitario : el crecimiento frente a la equidad
No full textAda Lattuca, ALADI. Secretaría General
D pseudo-bosons in quantum models
No full textWe show how some recent models of PT-quantum mechanics perfectly fit into the settings of D pseudo-bosons, as introduced by one of us. Among the others, we also consider a model of non-commutative quantum mechanics, and we show that this model too can be described in terms of D pseudo-bosons. © 2013 Elsevier B.V
Valores de tolerancia térmica máxima y mínima de tres especies de peces del Canal Beagle aclimatados a distintas temperaturas
No full textEsta base de datos contiene los valores de tolerancia térmica máxima y mínima de tres especies de peces (Odontesthes nigricans, Eleginops maclovinus y Galaxias maculatus) del Canal Beagle aclimatados a distintas temperaturas (2, 4, 10, 12 y 16 ºC).Fil: Lattuca, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentin
CARATTERIZZAZIONE DEL PROFILO QUALITATIVO DI CONDIMENTI A BASE DI OLI EXTRAVERGINI AROMATIZZATI CON OLI ESSENZIALI
No full textEl devenir del equilibrio de poder y el surgimiento de los sistemas “polares”
No full textEl equilibrio de poder es uno de los términos más repetidos por los estudiosos de las Relaciones Internacionales. No obstante ello, en su utilización hallamos una especial ausencia en su clarificación respecto de su contenido, y de allí la diversidad de opiniones algunas contrastantes, del término en cuestión. Algunos autores, no ayudan a desvelar sus intenciones cuando lo utilizan (Haas, 2008) y en conclusión se piensa que el problema no es la ausencia de significados sino que tiene demasiados. Sin embargo el concepto , a pesar de la diversidad de significados y usos es indispensable para la interpretación y comprensión de las relaciones internacionales...Fil: Lattuca, Ada. Universidad Nacional de Rosario; Argentina
An architectural generative design process
No full textThe paper discusses about architectural and urban design tools, and reports a prototype of parametric application that allows the designer to handle the architectural shape by using urban regulations. It is a Decision Support System (DSS), useful at the early stage of city planning as well as at the early stage of architectural design. The System integrates two different research topics: modelling in geo-referenced environment and modelling through constraints. Compared to the related works (Building Modelling on geo-referenced environment), our application is the first Generative System based on the urban regulation. Three case studies are presented to test the System
Clinical evaluation of morphology discrimination: An algorithm for rhythm discrimination in cardioverter defibrillators
No full textThe aim of this study was to test the new morphology discrimination diagnostic algorithm for ICDs that differentiates supraventricular tachycardias (SVTs) from VTs by analysis of ventricular depolarization complexes morphology. Twenty-five patients implanted with a St. Jude Ventritex single chamber ICD were studied during electrophysiological evaluation at predischarge and were followed for 7 +/- 4 months. Sensitivity and specificity for VT detection and overall diagnostic accuracy of the morphology discrimination algorithm were calculated on 326 detected events. At electrophysiological evaluation, the algorithm was tested during 67 episodes of right atrial pacing, during 119 episodes of RV pacing (at basal interventricular septum and RV apex) and during 27 episodes of sustained AF: specificity was 98%, sensitivity was 66%, and diagnostic accuracy was 80%. Ah episodes of AF were correctly diagnosed as SVT. Exclusion of detections related to pacing at the basal interventricular septum, resulted in a specificity of 98%, a sensitivity of 85%, and a diagnostic accuracy of 93%. During follow-up, evaluation of the morphology discrimination algorithm on 113 spontaneous episodes (31 VTs, 31 AF, 7 SVTs, and 44 sinus tachycardias) exhibited a specificity of 89%, a sensitivity of 100%, and a diagnostic accuracy of 92%. In conclusion, the morphology discrimination algorithm exhibits a high specificity in discriminating VTs from SVTs, although with a corresponding reduction in sensitivity. The preliminary experience on spontaneous episodes is promising. To correct for the reduction in sensitivity, it is advisable to use this algorithm in parallel with other algorithms for rhythm discrimination (sudden onset, stability) coupled with extended high rate
Non-Hermitian Hamiltonian for a modulated Jaynes-Cummings model with PT symmetry
No full textWe consider a two-level system such as a two-level atom, interacting with a cavity field mode in the rotating wave approximation, when the atomic transition frequency or the field mode frequency is periodically driven in time. We show that in both cases, for an appropriate choice of the modulation parameters, the state amplitudes in a generic {-}excitation subspace obey the same equations of motion that can be obtained from a emph{static} non-Hermitian Jaynes-Cummings Hamiltonian with symmetry, that is with an imaginary coupling constant. This gives further support to recent results showing the possible physical interest of symmetric non-Hermitian Hamiltonians. We also generalize the well-known diagonalization of the Jaynes-Cummings Hamiltonian to the non-Hermitian case in terms of pseudo-bosons and pseudo-fermions, and discuss relevant mathematical and physical aspects
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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