INTRODUCTION Evaluation of students' learning in clinical education system is one of the most important and challenging issues that facilities in this field have been facing. The present study aimed to evaluate the role of feedback during evaluation in increasing emergency medicine residents' clinical skills. METHOD The present experimental study was performed on all second year emergency med...

In this paper, we investigate a general class of partial channel state information feedback strategies for communication over flat fading multiple antenna channels with t transmitters and r receivers. Specifically, we consider scenarios where the partial channel state information is sent back from the receiver to the transmitter in the form of n beamformer vectors with corresponding power alloc...

Uplink communication in a cellular radio network is considered where the base station in each cell employs a linear or decision feedback (DF) multiuser receiver. The problem of minimizing the total transmit power over the receiver lter coeÆcients is considered under the constraint that all the users of the network achieve their signal-to-interference ratio (SIR) objectives. A distributed, stoch...

A coding scheme is proposed for the memoryless Gaussian broadcast channel with correlated noises and feedback. For all noise correlations other than ±1, the gap between the sumrate the scheme achieves and the full-cooperation bound vanishes as the signal-to-noise ratio tends to infinity. When the correlation coefficient is −1, the gains afforded by feedback are unbounded and the prelog is doubl...

Multiple-input multiple-output (MIMO) spatial multiplexing wireless systems achieve high spectral efficiencies by demultiplexing the incoming bit stream into multiple substreams. Spatial multiplexing is of practical importance because the multiple substreams can be decoded using linear receivers. Unfortunately, this reduction in complexity degrades the probability of error performance. To overc...

complies with the regulations of the university and meets the accepted standards with respect to originality and quality. Optical receivers have an important role in high data rate wireline data communication systems. Nowadays, these receivers have data rates of multi Gb/s. To achieve such high data rate in the design of optical receivers, all the amplifiers in the signal path need to be wideba...

In a single hop broadcast packet erasure network, we demonstrate that it is possible to provide multirate packet delivery outside of what is given by the network min-cut. This is achieved by using a deterministic non-block-based network coding scheme, which allows us to sidestep some of the limitations put in place by the block coding model used to determine the network capacity. Under the netw...

We formulate and study a cryptographic problem relevant to wireless: a sender, Alice, wants to transmit private messages to two receivers, Bob and Calvin, using unreliable wireless broadcast transmissions and short public feedback from Bob and Calvin. We ask, at what rates can we broadcast the private messages if we also provide (information-theoretic) unconditional security guarantees that Bob...

We consider a symbol-synchronous code-division multiple-access (CDMA) system that is equipped with a multiuser decision-feedback receiver and for which power control is available. The users are each assigned a quality-of-service (QoS) threshold to be guaranteed by the system, and to cover scenarios for which there are multiple classes of users, these are not required to be equal to each other. ...