Large time behavior for vortex evolution in the half-plane

In this article we study the long-time behavior of incompressible ideal flow in a half plane from the point of view of vortex scattering. Our main result is that certain asymptotic states for half-plane vortex dynamics decompose naturally into a nonlinear superposition of soliton-like states. Our approach is to combine techniques developed in the study of vortex confinement with weak convergence tools in order to study the asymptotic behavior of a self-similar rescaling of a solution of the incompressible 2D Euler equations on a half plane with compactly supported, nonnegative initial vorticity.Comment: 30 pages, no figure

Analytical study of tunneling times in flat histogram Monte Carlo

We present a model for the dynamics in energy space of multicanonical simulation methods that lends itself to a rather complete analytic characterization. The dynamics is completely determined by the density of states. In the \pm J 2D spin glass the transitions between the ground state level and the first excited one control the long time dynamics. We are able to calculate the distribution of tunneling times and relate it to the equilibration time of a starting probability distribution. In this model, and possibly in any model in which entering and exiting regions with low density of states are the slowest processes in the simulations, tunneling time can be much larger (by a factor of O(N)) than the equilibration time of the probability distribution. We find that these features also hold for the energy projection of single spin flip dynamics.Comment: 7 pages, 4 figures, published in Europhysics Letters (2005

Context-aware mobile app for the multidimensional assessment of the elderly,

Rural areas in Europe are presenting a decreasing population density and an increasing age index. These elders usually present multiple diseases that require complex tools to identify the exact cares that they need. Currently, different frameworks can evaluate their functional status and identify the required cares to maintain their Quality of Life, together with the associated cost to the health system. Nevertheless, these frameworks are usually questionnaires that have to be performed by already overloaded professionals. In this paper, we make use of mobile technologies to build a system capable of monitoring the activities of the elderly and analysing these data to assess their functional status. The experiments carried out show us that it correctly evaluates these patients and reduces the effort required by health professionals

Magnetic Field Dependent Behavior of the CDW ground state in Per2M(mnt)2 (M = Au, Pt)

The Per2M(mnt)2 class of organic conductors exhibit a charge density wave (CDW) ground state below about 12 K, which may be suppressed in magnetic fields of order 20 to 30 T. However, for both cases of counter ion M(mnt)2 species studied (M = Au (zero spin) and M = Pt (spin 1/2)), new high field ground states evolve for further increases in magnetic field. We report recent investigations where thermopower, Hall effect, high pressure and additional transport measurements have been carried out to explore these new high field phases.Comment: 6 pages, 10 figures, 27 reference

Enriched elderly virtual profiles by means of a multidimensional integrated assessment platform

The pressure over Healthcare systems is increasing in most developed countries. The generalized aging of the population is one of the main causes. This situation is even worse in underdeveloped, sparsely populated regions like Extremadura in Spain or Alentejo in Portugal. The authors propose to use the Situational-Context, a technique to seamlessly adapt Internet of Things systems to the needs and preferences of their users, for virtually modeling the elderly. These models could be used to enhance the elderly experience when using those kind of systems without raising the need for technical skills or the costs of implementing such systems by the regional healthcare systems. In this paper, the integration of a multidimensional integrated assessment platform with such virtual profiles is presented. The assessment platform provides and additional source of information for the virtual profiles that is used to better adapt existing systems to the elders needs

Sociosexuality, commitment, sexual infidelity, and perceptions of infidelity: data from the second love web site

This study explored the association between sociosexuality (behavior, attitudes, and desire) and commitment to understand sexual infidelity in current relationships. We also explored how these variables were associated with attitudes toward infidelity. Participants were romantically involved heterosexuals (N = 252; 51 women, 201 men; Mage = 41.13, SD = 9.82) registered on a dating Web site directed at romantically involved individuals. Results showed that sociosexuality, alongside commitment, was associated with sexual infidelity. Individuals who had (versus had not) previously engaged in infidelity reported more unrestricted sociosexuality, while reporting less commitment. For individuals reporting prior sexual infidelity, unrestricted sociosexual desire and lesser commitment were associated with more permissive perceptions of infidelity. For individuals reporting no prior sexual infidelity, greater commitment was always associated with more strict perceptions of infidelity. No gender differences emerged in the analyses. Also, no differences were found according to individual motivations (i.e., looking to know other people versus seeking casual sex) or relational motivations (i.e., individual registration versus registration as a couple) underlying individuals’ registration on the Web site. These results are an important addition to the literature on infidelity by analyzing a specific sample motivated to engage in infidelity. Implications for future research are discussed.info:eu-repo/semantics/acceptedVersio

'We agree and now everything goes my way': consensual sexual nonmonogamy, extradyadic sex, and relationship satisfaction

In sexually monogamous relationships (SMR), sociosexuality, or the predisposition to engage in extradyadic casual sex, is negatively associated with relationship outcomes. However, mutually consenting to sexually nonMR (SNMR) does not hinder relationship outcomes. Recent research has extended these findings to the phenomenon of online extradyadic sexual behavior. The aim of this study was to examine whether this sexual agreement moderates the association between sociosexuality and relationship satisfaction in a sample of romantically involved heterosexuals registered on a dating Web site directed at other romantically involved heterosexuals-Second Love. A sample of 329 Portuguese heterosexuals (66% men) aged 18-68 (M = 41.47, SD = 10.19) completed a web survey. A bootstrapped moderation analysis showed the expected negative association between sociosexuality and satisfaction, b=-0.18, p = 0.013. However, this was moderated by sexual agreement, b = 1.12, p < 0.001. While individuals in SMR showed the negative association, b(women) =-0.46, p < 0.001, b(men) = -0.67, p < 0.001, for those in SNMR the association between unrestricted sociosexuality and satisfaction was positive, b(women) = 0.63, p = 0.002, b(men) = 0.46, p = 0.006. Gender did not moderate these results. The current study suggests that dating Web sites for romantically involved heterosexuals are not necessarily negative for relationship outcomes as long as there is a consensual agreement for sexual nonmonogamy. This adds to the growing body of literature examining online sexual behavior and sexual infidelity.info:eu-repo/semantics/acceptedVersio

Consensual sexual nonmonogamy, extradyadic sex, and relationship satisfaction

In sexually monogamous relationships (SMR), sociosexuality, or the predisposition to engage in extradyadic casual sex, is negatively associated with relationship outcomes. However, mutually consenting to sexually non-MR (SNMR) does not hinder relationship outcomes. Recent research has extended these findings to the phenomenon of online extradyadic sexual behavior. The aim of this study was to examine whether this sexual agreement moderates the association between sociosexuality and relationship satisfaction in a sample of romantically involved heterosexuals registered on a dating Web site directed at other romantically involved heterosexuals—Second Love.info:eu-repo/semantics/publishedVersio