In ATM networks, VPCs (Virtual Path Connections) could be setup permanently or semi-permanently by network administrators to form a virtual private network or temporarily by applications to group several VCCs (Virtual Channel Connections) of users. Virtual path management is of great importance in maintaining ATM network service quality. In this paper, we propose our heuristics for three proble...

This work presents an experimental study of MIMO channel statistics and capacity via the recently proposed virtual channel representation, which describes the channel by a finite number of fixed virtual transmit/receive angles and delays. Our results confirm two important implications of virtual path partitioning: the virtual coefficients are approximately uncorrelated, and there exist fundamen...

Cochlear implant users' spectral resolution is limited by both the number of implanted electrodes and channel interactions between electrodes. Current steering (virtual channels) between two adjacent monopolar electrodes has been used to increase the number of spectral channels across the electrode array. However, monopolar stimulation is associated with large current spread and increased chann...

The Cray XT is an MPP system that scales up to 32K nodes using a bidirectional 3-dimensional torus interconnection network. Four virtual channels are used to provide point-to-point flow control and deadlock avoidance. Using virtual channels avoids unnecessary head-of-line (HoL) blocking for different network traffic flows, however, the extent to which virtual channels improves network utilizati...

Accurate and tractable channel modeling is critical to realizing the full potential of antenna arrays in wireless communications. Current approaches represent two extremes: idealized statistical models representing a rich scattering environment and parameterized physical models that describe realistic scattering environments via the angles and gains associated with different propagation paths. ...

This research is based on the realization that the desktop computing paradigm is not appropriate for television, because it is adapted to fundamentally different user aspirations and activities. Instead, the virtual channel is proposed as a model that explains the proper design of user access to personalized television programming. The virtual channel is a model that aids the organization and d...

Reported is a new mechanism for electronic transport of liquid in virtual channels. These virtual channels are formed by application of voltage to an array of polymer posts. The posts are coated with a conducting electrode and hydrophobic dielectric, and thereby capable of electrowetting. Directional channel formation, as well as splitting and merging, is also demonstrated using specific arrang...

In this paper, the channel segregation dynamic channel allocation (CS-DCA) scheme is applied to a multi-hop DS-CDMA virtual cellular network (VCN). After all multi-hop routes are constructed over distributed wireless ports in a virtual cell, the CS-DCA is carried out to allocate the channels to multi-hop up and down links. Each wireless port is equipped with a channel priority table. The transm...

VMware ESX Server provides strong security and performance isolation for virtual machine storage. Each virtual machine sees only the virtual disks that have been presented to its virtual SCSI adapters. Virtual machines cannot see the physical Fibre Channel HBAs on the ESX Server host on which they run. Nor, in typical use cases, do they see the LUNs on which their virtual disks reside. Emerging...

iran’s industry has had a considerable number of difficulties to perform so well as was expected in the post – revolutionary era. unfavorable legal, political environments combined with eight –year imposed war may be singled out as the root causes of such performances. however, this paper argues that our industry’s lack of realization of its dire need to adapt to the emerging unprecedented envi...