Search results

Filter

Filetype

Your search for "*" yielded 530849 hits

A chip for linearization of RF power amplifiers using predistortion based on a bit-parallel complex multiplier

This paper presents a custom chip for linearization of RF power amplifiers using digital predistortion. The chip has been implemented in a standard digital 0.8 mu m CMOS process with standard static cells and single-phase clocking. A systolic complex multiplier based on distributed arithmetic constitutes the core of the chip. The nonlinear function is realized with a look-up table containing compl

In diabetic eyes, multifocal ERG reflects differences in function between the nasal part and the temporal part of the macula.

PURPOSE: The purpose of the present study was to compare retinal function between the perifoveal nasal and perifoveal temporal areas of diabetic eyes using multifocalERG (mfERG). METHODS: We included 36 eyes from 27 patients with diabetes (age 58 ± 14 years; duration of diabetes 13 ± 9 years; HbA(1c) 7.1 ± 1.8%) and a control group with 18 eyes from 18 healthy subjects (age 57 ± 11 years). Retin

Heparin-binding protein: a diagnostic biomarker of urinary tract infection in adults.

Urinary tract infections (UTIs) are associated with significant morbidity and high frequency of antibiotic prescription. Diagnosing UTI is often difficult, particularly in the critically ill patient and in patients with unspecific and mild symptoms. The standard rapid tests have limited value, and there is a need for more reliable diagnostic tools. Heparin-binding protein (HBP) is released from ne

Meanwhile on the Other Side of the Pond: Why Biopharmaceutical Inventions that Were “Obvious to Try” Still Might Be Non-Obvious – Part I

Following the seminal US Supreme Court decision in KSR v. Teleflex, the law of (non)-obviousness has once more become a major topic in US patent law. Of crucial importance to the biopharmaceutical industry is in particular the following question: Under what circumstances should an invention that was "obvious to try" be considered to be obvious in fact under current US patent law? In that regard, a

Uncoupled antenna matching for performance optimization in compact MIMO systems using unbalanced load impedance

Some MIMO applications require antennas to be closely spaced, which result in mutual coupling among antennas and high spatial correlation for signals. In order to compensate for the performance degradation due to correlation and coupling, impedance matching networks may be used. Recently, it was shown that uncoupled matching networks could be optimized against a given performance metric with the c

Levodopa Treatment Improves Functional Recovery After Experimental Stroke.

BACKGROUND AND PURPOSE: Delayed treatment of patients with stroke with levodopa/benserazide contributes to enhanced functional recovery, but the mechanisms involved are poorly understood. The present study was designed to investigate if levodopa/benserazide treatment improves recovery of lost neurological function and contributes to tissue reorganization in the rat brain after stroke. METHODS: Mal

Modeling auxin transport and plant development

The plant hormone auxin plays a critical role in plant development. Central to its function is its distribution in plant tissues, which is, in turn, largely shaped by intercellular polar transport processes. Auxin transport relies on diffusive uptake as well as carrier-mediated transport via influx and efflux carriers. Mathematical models have been used to both refine our theoretical understanding