Uncertainty in Reverberation-Chamber Antenna-Efficiency Measurements in the Presence of a Phantom.

The effect of a user's proximity on wireless device performance is critical to test the device under realistic conditions. In this work, we propose and demonstrate an improved uncertainty estimation method for antenna efficiency measurements in a reverberation chamber. The improved method separately computes uncertainties due to the effects of chamber loading by a phantom and the effects of antenna mismatch introduced by this phantom, illustrating the sensitivity of uncertainty to close-proximity user effects. We demonstrate that, while the impact of the phantom may be significant on antenna efficiency, and, it has some influence on the uncertainty in the measurement, its impact on overall uncertainty may be insignificant. This is demonstrated using the two-antenna method in the presence of a phantom close to the antenna under test. We illustrate the method by summarizing the antenna efficiencies with their uncertainties and the impact of the phantom for important communication bands. Due to the large effect of the user on antenna performance, this type of measurement and its uncertainty evaluation is a valuable way to characterize antenna efficiency including user effects.

[Pregnancy after transobturator insertion of a suburethral sling: a case report and review of the literature]. / Grossesse après soutènement sous-urétral par voie trans-obturatrice (Monarc).

Rare cases of pregnancy occur after surgical treatment of an urinary incontinence. We report the case of a 37-year-old patient became pregnant 5 months after trans-obturator insertion of a suburethral sling (Monarc). The pregnancy was monitored regularly and no sign of urinary incontinence was observed. Caesarean delivery was decided at 40 weeks gestation. The patient has remained quite continent, one year after delivery. The appropriate mode of delivery is discussed.

[Haemophagocytic syndrome in pregnancy: a case report]. / Syndrome d'activation macrophagique et grossesse: à propos d'un cas.

Haemophagocytic syndrome (HPS) results from an inappropriate stimulation of macrophages in bone marrow and lymphoid organs, leading to haemophagocytosis and hypercytokinemia. HPS may be primitive, essentially in pediatric population, or secondary to malignancy, infection or autoimmune disease. This disease is rare and prognosis is poor. A small number of cases during pregnancy have been described in literature. We report one HPS case in a pregnant patient at 21 week's gestation with systemic lupus erythematosus. We discuss diagnostic difficulties, obstetrical complications and therapeutic options.