Pedro Alexandre Lopes de Sousa Martins

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The human ear is a complex biomechanical system and is divided into three parts: outer, middle and inner ear. The middle ear is formed by ossicles (malleus, incus and stapes), ligaments, muscles and tendons, which transfers sound vibrations from the eardrum to the inner ear, linking with mastoid and Eustachian tube. In this work, a finite element modelling(More)
PURPOSE To investigate the tensile biomechanical properties of round and uterosacral ligaments. METHODS Tissue samples were obtained from 15 female cadavers without pelvic organ prolapse. Uniaxial tensile tests were performed to obtain stiffness and maximum stress of round and uterosacral ligaments. Correlations were calculated using the Pearson(More)
Besides material biocompatibility, it is possible to infer that both vaginal and urethral erosion rates associated with sub-urethral synthetic slings may be related to the mechanical properties of the meshes and also to their other properties. With the aim of understanding what distinguishes the different polypropylene meshes, used for the treatment of the(More)
INTRODUCTION Pelvic floor (PF) dysfunctions represent a frequent and complex problem for women. The interaction between the vagina and its supportive structures, that are designed to support increases in abdominal pressure, can be considered a biomechanical system. Recent advances in imaging technology have improved the assessment of PF structures. The aim(More)
BACKGROUND/AIMS This study aims to evaluate the pelvic floor (PF) tension response during simulated increased intra-abdominal pressure (IAP) and the vaginal biomechanical properties. METHODS A 3-dimensional computational finite element model for PF was developed based on magnetic resonance imaging from a nulliparous healthy volunteer. The model was used(More)
The treatment of mail objects in a mail processing centre involves many operations, in particular sorting by destination. Out of the batching problem that we can identify in such a process, there are also staa planning concerns. In this paper, we analyse a treatment area (registered mail) belonging to a mail processing center, where mail objects are treated(More)
This paper describes and discusses the work carried on in the context of the CORTEX project, for the development of adaptive real-time applications in wormhole based systems. The architecture of CORTEX relies on the existence of a timeliness wormhole, called Timely Computing Base (TCB), which we have described in previous papers. Here we focus on the(More)
Aiming to reconcile uncertainty with an application's required predictability, this innovative programming model is based on fulfilling the coverage stability and no-contamination predicates. A video demonstration illustrates the model's practical value. The convergence of several factors, including advances in wireless and sensory technologies, has created(More)