5,900 research outputs found
Model-based Optimization of Compressive Antennas for High-Sensing-Capacity Applications
This paper presents a novel, model-based compressive antenna design method
for high sensing capacity imaging applications. Given a set of design
constraints, the method maximizes the sensing capacity of the compressive
antenna by varying the constitutive properties of scatterers distributed along
the antenna. Preliminary 2D design results demonstrate the new method's ability
to produce antenna configurations with enhanced imaging capabilities
More on microstate geometries of 4d black holes
We construct explicit examples of microstate geometries of four-dimensional
black holes that lift to smooth horizon-free geometries in five dimensions.
Solutions consist of half-BPS D-brane atoms distributed in .
Charges and positions of the D-brane centers are constrained by the bubble
equations and boundary conditions ensuring the regularity of the metric and the
match with the black hole geometry. In the case of three centers, we find that
the moduli spaces of solutions includes disjoint one-dimensional components of
(generically) finite volume.Comment: 25 page
Examining the impact of community factors on student truancy
Truancy has been an ongoing issue in the lives of many urban and low-income students. Poor school attendance has been one of the earliest indicators of academic failure, delinquency, crime, poverty and etc. Although there have been a number of different definitions for truancy, the law has consistently stated that underage students must attend school. It has been clear that addressing and combating truancy has been an issue in many cities. Research has identified many truancy risk indicators and various community factors have appeared to impact truancy rates. Additionally, within an urban setting, the availability of public transportation to and from school has also been implicated as a factor in school attendance. This current study examined the relationship between student truancy rates and community factors and the availability of student transportation. The results found that high school students had higher absent rates, that community factors were not related to number of absences, and a significant interaction between transportation and high school students
Entropy-expansiveness for partially hyperbolic diffeomorphisms
We show that diffeomorphisms with a dominated splitting of the form
, where is a nonhyperbolic central bundle that
splits in a dominated way into 1-dimensional subbundles, are entropy-expansive.
In particular, they have a principal symbolic extension and equilibrium states.Comment: 15 pages, 1 figur
Real-time audio interaction in serious games for music learning
In this LBD, we present several Apps for playing while learning music or for learning music while playing. The core of all the games is based on the good performance of the real-time audio interaction algorithms developed by the ATIC group at Universidad de Ma Ìlaga (SPAIN).Universidad de MĂĄlaga. Campus de Excelencia Internacional AndalucĂa Tech. This work has been funded by the Ministerio de Econom ıa y Competitividad of the Spanish Government under Project No. TIN2013-47276-C6-2-R and by the Junta de AndalucĂa under Project No. P11-TIC-7154
A first-principles study and some applied researches of high-temperature superconductors and other low-dimensional functional materials
This thesis comprises two parts: The first is a fundamental theoretical study of hightemperature
superconductors (HTS), addressing the energy balances involved in the
superconducting pairing (research started under supervision of Prof. A.J. Leggett, in
stays at the University of Illinois at Urbana-Champaign, USA). The study presents an
extension, to the case of HTS, of equations originally derived for simple
superconductors by G.V. Chester that link the energy saved by the
superconductivity with the structural properties of the materials. The second part
addresses applied aspects of various micro and nanostructured functional materials,
including both HTS (optimization of superconducting devices, as bolometric
radiation sensors, hybrid piezoelectric-superconducting films, and other) and
electrostatic nanostructured microporous (ENM) media for nanofluid filtration
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