Since mobile hosts suffer from burst and location-dependent channel errors in wireless networks, packet fair queueing algorithm in wireline networks cannot be applied directly to wireless networks. Generally, a fair scheduler in a wireless network retains the virtual time of flow when the flow encounters channel errors. This results to the flow having higher priority when it exits from errors, ...

An understanding of the interaction between the channel and the signal space is key to reliable communication. Multipath fading channels exhibit inherent diversity that can be exploited via appropriate signaling and reception. In this paper, we develop a virtual MIMO framework for code division multiple access (CDMA) systems for maximally exploiting channel diversity at both the transmitter and...

Research in distributed video coding for low complexity encoding has shown that without knowledge of the correlation between source and side information (i.e. the behavior of the virtual dependency channel), the performance is substantially below that of well known state-of-the-art video coders. In this paper we investigate the modeling of the virtual channel for a pixel-based Wyner-Ziv coding ...

Cloud computing relies on hypervisors to isolate virtual machines running on shared hardware. Since perfect isolation is difficult to achieve, sharing hardware induces threats. Covert channels were demonstrated to violate isolation and, typically, allow data exfiltration. Several covert channels have been proposed that rely on the processor’s cache. However, these covert channels are either slo...

according to the changing business, nowadays teams are cornerstones of successful organizations, in addition, with the developments and technological innovations in communication and information, virtual teams are playing more critical role in today's business. on this basis, determining factors which affect virtual team's performance are important to both scholars and practitioners. ...

Applications typically have some local understanding of a database schema, a virtual database that may differ significantly from the actual schema of the data where it is stored. Application engineers often support a virtual database using custom-built middleware because the available solutions, including updatable views, are unable to express necessary capabilities. We propose an alternative m...

Ion channels represent a large family of membrane proteins with many being well established targets in pharmacotherapy. The 'druggability' of heteromeric channels comprised of different subunits remains obscure, due largely to a lack of channel-specific probes necessary to delineate their therapeutic potential in vivo. Our initial studies reported here, investigated the family of inwardly recti...

In the Wyner wiretap channel a sender is connected to a receiver and an eavesdropper through two noisy channels. It has been shown that if the noise in the eavesdropper channel is higher than the receiver’s channel, information theoretically secure communication from Alice to Bob, without requiring a shared key, is possible. The approach is particularly attractive noting the rise of quantum com...

As shown by Médard, the capacity of fading channels with imperfect channel-state information (CSI) can be lowerbounded by assuming a Gaussian channel input and by treating the unknown portion of the channel multiplied by the channel input as independent worst-case (Gaussian) noise. Recently, we have demonstrated that this lower bound can be sharpened by a rate-splitting approach: by expressing ...

Virtual simulations allow individuals to concretely view the future negative health consequences of present dietary choices. Integrating exemplification theory with risk communication research, the effect of using virtual simulations to exemplify the health risks of soft drink consumption was assessed across 3 weeks. A three-group pretest, posttest, and delayed posttest design (N = 62) compared...