Pedro Alexandre Lopes de Sousa Martins

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The convergence of several factors, including advances in wireless and sensory technologies, has created the conditions for constructing highly autonomous and proactive applications. The Information Society Technologies' CORTEX (Cooperating Real-time Sentient Objects: Architecture and Experimental Evaluation) project under which we've developed, applied,(More)
The objective of the present study was to investigate the tensile biomechanical properties of the human female bladder. Tissue samples were obtained from 13 cadavers without pelvic floor dysfunctions. We performed uniaxial tensile tests to measure the stiffness and maximum stress of the bladder tissue. Correlations were calculated using the Pearson(More)
To investigate the tensile biomechanical properties of round and uterosacral ligaments. 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 correlation coefficient.(More)
The round-trip duration measurement technique is fundamental to solve many problems in asynchronous distributed systems. In essence, this technique provides the means for reading remote clocks with a known and bounded error. Therefore, it is used as a fundamental building block in several clock synchronization algorithms. In general, the technique can be(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)
Silicone breast implants have been used for cosmetic and reconstructive breast surgery for several decades. Rupture and silicone leakage are well-known complications for silicone mammary implants. However, in the last years, an unexpected high prevalence of rupture and silicone leakage have been reported for the Poly Implant Prothèse (PIP) manufacturer,(More)
In a recent paper we introduced a new model to deal with the problem of handling application timeliness requirements in environments with loose real-time guarantees. This model, called the Timely Computing Base (TCB), is one of partial synchrony. From an engineering point of view, it requires systems to be constructed with a small control part, a TCB(More)
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)
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 of this paper(More)