5,445 research outputs found
Modeling eating disorders of cognitive impaired people
Millions of people all around the world suffer from eating
disorders, known as anorexia nervosa, bulimia nervosa, pica, and others. When eating disorders coexist with other mental health disorders, eating disorders often go undiagnosed and untreated; a low number of sufferers
obtain treatment for the eating disorder. Unfortunately, eating disorders have also the highest mortality rate of any mental illness, upwards of 20%.
This paper focuses on monitoring eating disorders of cognitive impaired people as patients with the Alzheimer’s disease. The proposed approach relies on the application of Ambient Intelligence (AmI) technologies and a new method for the detection of abnormal human behaviors in a controlled environment
Bulk viscosity in 2SC and CFL quark matter
The bulk viscosities of two color-superconducting phases, the color-flavor
locked (CFL) phase and the 2SC phase, are computed and compared to the result
for unpaired quark matter. In the case of the CFL phase, processes involving
kaons and the superfluid mode give the largest contribution to the bulk
viscosity since all fermionic modes are gapped. In the case of the 2SC phase,
ungapped fermionic modes are present and the process u+d u+s provides the
dominant contribution. In both cases, the bulk viscosity can become larger than
that of the unpaired phase for sufficiently large temperatures (T >~ 1 MeV for
CFL, T >~ 0.1 MeV for 2SC). Bulk viscosity (as well as shear viscosity) is
important for the damping of r-modes in compact stars and thus can potentially
be used as an indirect signal for the presence or absence of
color-superconducting quark matter.Comment: 8 pages, 3 figures, contribution to the proceedings of QCD@Work 2007,
Martina Franca (Italy
The heuristic strategies for assessing wireless sensor network: an event-based formal approach
Wireless Sensor Networks (WSNs) are increasingly being adopted in critical applications. In these networks undesired events may undermine the reliability level; thus their effects need to be properly assessed from the early stages of the development process onwards to minimize the chances of unexpected problems during use. In this paper we propose two heuristic strategies: what-if analysis and robustness checking. They allow to drive designers towards optimal WSN deployment solutions, from the point of view of the connection and data delivery resiliency, exploiting a formal approach based on the event calculus formal language. The heuristics are backed up by a support tool aimed to simplify their adoption by system designers. The tool allows to specify the target WSN in a user-friendly way and it is able to elaborate the two heuristic strategies by means of the event calculus specifications automatically generated. The WSN reliability is assessed computing a set of specific metrics. The effectiveness of the strategies is shown in the context of three case studies
Charm physics prospects at the Belle II experiment
Belle II is a major upgrade of the Belle experiment and will operate at the B-factory SuperKEKB in Japan. Here we discuss the expected sensitivity of Belle II for D0 - D¯ 0 mixing and CP violation measurements in the charm sector,
which will benefit from a factor 50 increase in statistics and an improved vertex detection. The impact on the determination of CKM parameters from the measurements of purely leptonic D mesons decays is discussed. A novel method of flavour tagging to substantially increase the sample of D0 and D¯ 0 is also presented
Locking-free curved elements with refined kinematics for the analysis of composite structures
A new class of refined curved beam elements is proposed for the accurate stress analysis of composite structures. The element
possesses three-dimensional capabilities and it is suited for the study of curved laminates and fiber-reinforced composites at
the microscopic scale. The numerical issues associated with membrane and shear lockings are overcome by means of assumed
interpolations of the strain components based on the mixed interpolation of tensorial components method (MITC). Higher-order
expansions with only displacement unknowns are employed for the cross-section assumptions at the component level, enabling
the computation of component-wise stress fields. For this purpose, a hierarchical set of Legendre functions is implemented, which
allows the user to tune the kinematics of the element through the polynomial order input. The detrimental effects of locking in
composite modeling are investigated and the robustness and efficiency of the beam element is assessed through comparison against
solutions from the literature and refined solid models
Non-collinear quasi phase matching and annular profiles in difference frequency generation with focused Gaussian beams.
We present and experimentally test a simple model for difference frequency generation (DFG) in periodically-poled crystals with gaussian pumping beams. Focusing of input beams originates several non-collinear quasi-phase-matching configurations of the interacting wavevectors, which contribute to the idler output field. In this picture, we accurately describe a number of effects, such as the occurrence of annular idler intensity profiles and the asymmetric trend of DFG power vs temperature. Finally, we quantitatively test the model by means of an indirect measurement of the crystal poling period
Secondary Baryon Asymmetry in pi(+-)p Collisions
The process of secondary baryon production in pi(+-)p collisions at high
energies in the central and forward fragmentation regions is considered in the
framework of the Quark-Gluon String Model. The contribution of the
string-junction mechanism to the baryon production is analysed. The results of
numerical calculations are in reasonable agreement with the experimental data
on the Lambda/bar(Lambda) and p/bar(p)$ asymmetries.Comment: Contribution to the Proceedings of QCD@Work 2007, International
Workshop on Quantum Chromodynamics, Theory and Experiment, Martina
Franca-Valle d'Itria, Italy, June 16-20, 2007 (6 pages and 4 figures
Congruences of lines in , quadratic normality, and completely exceptional Monge-Amp\`ere equations
The existence is proved of two new families of locally Cohen-Macaulay sextic
threefolds in , which are not quadratically normal. These
threefolds arise naturally in the realm of first order congruences of lines as
focal loci and in the study of the completely exceptional Monge-Amp\`ere
equations. One of these families comes from a smooth congruence of multidegree
which is a smooth Fano fourfold of index two and genus 9.Comment: 16 page
Signals of Warped Extra Dimensions at the LHC
We discuss the signatures of the spin-2 graviton excitations predicted by the
Randall-Sundrum model with one warped extra dimension, in dilepton and diphoton
production at LHC. By using a specific angular analysis, we assess the ranges
in mass and coupling constant where such gravitons can be discriminated against
competitor spin-1 and spin-0 objects, that potentially could manifest
themselves in these processes with the same mass and rate of events. Depending
on the value of the coupling constant to quarks and leptons, the numerical
results indicate graviton identification mass ranges up to 1.1-2.4 TeV and
1.6-3.2 TeV for LHC nominal energy of 14 TeV and time-integrated luminosity of
10 and 100~, respectively.Comment: 8 pages, Talk given at QCD@Work - International Workshop on QCD -
Theory and Experiment, 20 - 23 June, 2010, Martina Franca Ital
A static analysis of three-dimensional sandwich beam structures by hierarchical finite elements modelling
A static analysis of three-dimensional sandwich beam structures using one-dimensional modelling approach is presented within this paper. A family of several one-dimensional beam elements is obtained by hierarchically expanding the displacements over the cross-section and letting the expansion order a free parameter. The finite element approximation order over the beam axis is also a formulation free parameter (linear, quadratic and cubic elements are considered). The principle of virtual displacements is used to obtain the problem weak form and derive the beam stiffness matrix and equivalent load vectors in a nuclear, generic form. Displacements and stresses are presented for different load and constraint configurations. Results are validated towards three-dimensional finite element solutions and experimental results. Sandwich beams present a three-dimensional stress state and higher-order models are necessary for an accurate description. Numerical investigations show that fairly good results with reduced computational costs can be obtained by the proposed finite element formulation
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