The performance of an underlay cognitive (secondary) dual-hop relaying system with multiple antennas and hardware impairments at each transceiver is investigated. In particular, the outage probability of the end-to-end (e2e) communication is derived in closed-form, when either transmit antenna selection with maximum ratio combining (TAS/MRC), or TAS with selection combining (TAS/SC) are establi...

Olivier Cassar, Sylviane Bassot, Sabine Plancoulaine, Lluis Quintana-Murci, Christine Harmant, Vladimir Gurtsevitch, Natalia B. Senyuta, Larissa S. Yakovleva, Guy de Thé, and Antoine Gessain Author affi liations: Institut Pasteur, Paris, France (O. Cassar, S. Bassot, S. Plancoulaine, L. Quintana-Murci, G. de Thé, C. Harmant, A. Gessain); Institut National de la Santé et de la Recherche Médicale...

Recently, a new paradigm for cognitive radio networks has been advocated, where primary users (PUs) recruit the secondary users (SUs) to cooperatively relay the primary traffic, and in return grant the SUs the right to access the channel. However, all existing work on such cooperative cognitive radio networks (CCRNs) operate in the temporal domain only, which limits the performance of both PUs ...

BACKGROUND Bariatric surgery is an option for sustained weight loss for the morbidly obese patient. In Brazil coexists the Unified Health System (SUS) with universal coverage and from which depend 150 million Brazilians and supplemental health security, predominantly private, with 50 million beneficiaries. AIM To compare access, in-hospital mortality, length of stay and costs for patients und...

BACKGROUND A core objective of the Society of University Surgeons (SUS) is research focused: to "advance the art and science of surgery through original investigation." This study sought to determine the current impact of the SUS on academic surgical productivity. METHODS Individual faculty data for numbers of publications, citations, and National Institute of Health (NIH) funding history wer...

An association has been reported between high levels of alexithymia and depression in patients with eating disorders. This study has examined alexithymic features and depressive experiences in patients with DSM-IV eating disorder (restricting anorexia, n=105; purging anorexia, n=49; bulimia, n=98) and matched controls (n=279). The subjects were assessed with the Toronto Alexithymia Scale (TAS-2...

Objective Comparison of the total oxidant status (TOS), total antioxidant status (TAS) and paraoxonase (PON1) serum levels in patients with nasal septum deviation (NSD) and healthy subjects. Methods The TAS, TOS, and PON1 serum levels of 47 patients with NSD (mean age 35.3) and 50 healthy subjects (mean age 37.8) were compared in this study. Results We found significantly higher TAS levels ...

CONTEXT Oxidative stress has been implicated in the pathogenesis of type 2 diabetes mellitus (T2DM) and its complications. AIMS This study was conducted to determine and compare total antioxidant status (TAS), vitamin C and E levels in T2DM patients and healthy control subjects. SETTINGS AND DESIGN Fifty-five previously diagnosed DM patients aged between 34 years and 70 years and 50 control...

Our aim was to examine some parameters of oxidative status, gelatinases, and their inhibitors and to evaluate their interrelationships in subjects with metabolic syndrome (MS). We enrolled 65 MS subjects, subdivided according to the presence or not of diabetes mellitus. We examined lipid peroxidation (expressed as thiobarbituric acid reacting substances, TBARS), protein oxidation (expressed as ...