Introduction: Feedback cards are recommended as a feasible toolfor structured written feedback delivery in clinical education whileeffectiveness of this tool on the medical students’ performanceis still questionable. The purpose of this study was to comparethe effects of structured written feedback by cards as well asverbal feedback versus verbal feedback alone on the clinicalperformance of med...

This paper addresses the problem of equalization space-time codes with transmit diversity. We derive a symbol-by-symbol MAP equalizer/decoder for space-time coded signals over frequency selective channels. We describe a turbo equalization/decoding scheme where the results of the decoding are fed back to the equalizer. Simulation results show an improved equalizer performance due to the feedback.

A multiple decision delay decision-feedback equalizer (MDDDFE) is proposed for short-burst data communication over frequency-selective Rayleigh-fading indoor wireless channels. Simulation results show that MDDDFE can maintain low average bit error rate without incurring too much computational overhead. In particular, approximately 3dB gain over the conventional single DFE approach is obtainable...

Rumelhart & Zipser's (1986) competitive learning algorithm is an account of unsupcrvised learning and, as such, might be considered a potential model of free classification behavior in humans. However, selective learning effects (e.g. Dickinson, Shanks & Evenden, 1984) suggest that human learning, ai least under conditions of feedback, may be better characterized by an error-correcting system. ...

The pH-sensitive chromoionophores brought the dream of the ion-selective membrane scientist close to realization. With the help of these molecules, one can build pH-sensitive, ion-selective electrodes and look into the bulk of solvent polymeric membranes during potentiometric measurements (spectropotentiometry) and image concentration profiles in situ with high spatial and temporal resolution. ...

The presented review summarizes experimental data obtained with a mouse model when investigating the relationship between inhibition of prostaglandin production and hematopoiesis. While prostaglandin E2 acts in a negative feedback control of myelopoiesis, inhibition of cyclooxygenases, responsible for its production, shifts the feedback to positive control. Based on these relationships, agents ...

In the primary visual cortex, neurons with similar response preferences are grouped into domains forming continuous maps of stimulus orientation and direction of movement. These properties are widely believed to result from the combination of ascending and lateral interactions in the visual system. We have tested this view by examining the influence of deactivating feedback signals descending f...

Retinal bipolar cells (BCs) transmit visual signals in parallel channels from the outer to the inner retina, where they provide glutamatergic inputs to specific networks of amacrine and ganglion cells. Intricate network computation at BC axon terminals has been proposed as a mechanism for complex network computation, such as direction selectivity, but direct knowledge of the receptive field pro...