Roberto Padovani

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This article presents an approach to providing very high-data-rate downstream Internet access by nomadic users within the current CDMA physical layer architecture. Means for considerably increasing throughput by optimizing packet data protocols and by other network and coding techniques are presented and supported by simulations and laboratory measurements.(More)
OBJECTIVE Nonalcoholic fatty liver disease (NAFLD) is closely associated with several metabolic syndrome features. We assessed whether NAFLD is associated with carotid artery intima-media thickness (IMT) as a marker of subclinical atherosclerosis and whether such an association is independent of classical risk factors, insulin resistance, and metabolic(More)
This paper considers the application of cooperative base-station (BS) transmission schemes to the downlink of multicell networks. Based on a simplified Wyner-type network model with users clustered at the cell-edges, closed form sum rate expressions for non-fading channels are derived for dirty-paper coding (DPC), linear zero-forcing (ZF) precoding, and(More)
AT IS CURRENTLY WIDELY ACCEPTED THAT Forward Error Correcting (FEC) coding is a practical technique for increasing the transmission efficiency of virtually all digital communication channels. whatever their power or bandwidth limitations. Efficiency then applies to both the power and the bandwidth required to support a given information rate. or conversely(More)
N onalcoholic fatty liver disease (NAFLD) is a clinicopathological syndrome that is closely associated with obesity, dyslipidemia, insulin resistance, and type 2 diabetes, thus suggesting that NAFLD represents another component of the metabolic syndrome (1,2). Because it is now recognized that individuals with the metabolic syndrome are at increased(More)
In this paper, we study the potential benefit of base-station (BS) cooperation for downlink transmission in a modified Wyner-type multicell model. Besides the dirty-paper-coding (DPC) precoder, we also analyze several linear precoding schemes, including co-phasing, zero-forcing (ZF) and MMSE precoders. For the nonfading case, analytical sum rate expression(More)
OBJECTIVE To estimate the prevalence of hypovitaminosis D among type 2 diabetic adults and to assess the relationship between hypovitaminosis D and intimal medial thickening (IMT) of the common carotid artery, a marker of preclinical atherosclerosis. DESIGN, PATIENTS AND MEASUREMENTS We compared winter serum 25-hydroxyvitamin D3 [25(OH)D] concentrations(More)
This article describes the European DIMOND approach to defining reference levels (RLs) for radiation doses delivered to patients during two types of invasive cardiology procedures, namely coronary angiography (CA) and percutaneous transluminal coronary angioplasty (PTCA). Representative centres of six European countries recorded patients' doses in terms of(More)
AIMS To estimate the prevalence of cardiovascular disease (CVD) in Type 2 diabetic patients with and without non-alcoholic fatty liver disease (NAFLD), and to assess whether NAFLD is independently related to prevalent CVD. METHODS We studied 400 Type 2 diabetic patients with NAFLD and 400 diabetic patients without NAFLD who were matched for age and sex.(More)
BACKGROUND/AIMS To compare carotid intima-media thickness (IMT) - an index of early atherosclerosis - among patients with non-alcoholic steatohepatitis (NASH), patients with chronic hepatitis B (HBV) or C (HCV) and control subjects. METHODS We studied 60 consecutive patients with biopsy-proven NASH, 60 patients with HCV, 35 patients with HBV, and 60(More)