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  1. No Access

    Chapter and Conference Paper

    The Effect of Menopause on the Sexual Dimorphism in the Human Retina – Texture Analysis of Optical Coherence Tomography Data

    Sexual dimorphism in the human retina has recently been connected to gonadal hormones. In the study herein presented, texture analysis was applied to computed mean value fundus (MVF) images from optical cohere...

    Ana Nunes, Pedro Serranho, Hugo Quental… in Image Analysis and Recognition (2020)

  2. No Access

    Chapter and Conference Paper

    Characterization of the Retinal Changes of the 3xTg-AD Mouse Model of Alzheimer’s Disease

    In this work, we imaged the retina of wild-type and triple-transgenic mice model of Alzheimer’s disease (AD) (3xTg-AD), at the ages of one and two months, by optical coherence tomography. Texture analysis of c...

    Hugo Ferreira, João Martins, Ana Nunes… in XV Mediterranean Conference on Medical and… (2020)

  3. No Access

    Chapter and Conference Paper

    Sexual Dimorphism of the Adult Human Retina Assessed by Optical Coherence Tomography

    In this work, we imaged the retina of healthy age-matched female and male subjects with optical coherence tomography to assess the existence of localised sex-related differences in the retina. Texture analysi...

    Ana Nunes, Pedro Serranho, Hugo Quental… in XV Mediterranean Conference on Medical and… (2020)

  4. Chapter and Conference Paper

    AJITTS: Adaptive Just-In-Time Transaction Scheduling

    Distributed transaction processing has benefited greatly from optimistic concurrency control protocols thus avoiding costly fine-grained synchronization. However, the performance of these protocols degrades si...

    Ana Nunes, Rui Oliveira, José Pereira in Distributed Applications and Interoperable Systems (2013)

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  5. No Access

    Chapter and Conference Paper

    Voice Quality of European Portuguese Emotional Speech

    In this paper we investigate parameters related to voice quality in European Portuguese (EP) emotional speech. Our main objectives were to obtain, to our knowledge for the first time, values for the parameters...

    Ana Nunes, Rosa Lídia Coimbra… in Computational Processing of the Portuguese… (2010)

  6. No Access

    Chapter and Conference Paper

    SIRS Dynamics on Random Networks: Simulations and Analytical Models

    The standard pair approximation equations (PA) for the Susceptible-Infective-Recovered-Susceptible (SIRS) model of infection spread on a network of homogeneous degree k predict a thin phase of sustained oscillati...

    Ganna Rozhnova, Ana Nunes in Complex Sciences (2009)

  7. No Access

    Chapter and Conference Paper

    General Relativity As an Attractor to Scalar-Tensor Gravity Theories

    We investigate the conditions under which general scalar-tensor gravity theories relax towards General Relativity. We extend the work of Damour and Nordtvedt [2] by studying the effects of the inclusion of a c...

    José P. Mimoso, Ana Nunes in The Non-Slee** Universe (1999)

  8. No Access

    Chapter and Conference Paper

    Invariant Tori and Cylinders for a Class of Perturbed Hamiltonian Systems

    We start with a relativistic model of the Kepler Problem, which is an isoenergetically non-degenerate central force problem in 2 dimensions. Then we prove the persistence of invariant cylinders and tori for a ...

    Ernesto A. Lacomba, Jaume Llibre, Ana Nunes in The Geometry of Hamiltonian Systems (1991)