Fred Smith, an education consultant and former analyst for the city school system's human resource division who has studied teacher attrition, found that of nearly 7,600 teachers hired in the 2001-2 school year, more than 19percentt left within one year -- 11.6percentt voluntarily -- and about a third left within two.
Similarly, resource division is present in the economic dimension.
In this paper, two intercluster interference mitigation techniques are investigated and compared, namely interference alignment and resource division multiple access.
In [16], two interference mitigation techniques have been investigated and compared, namely interference alignment and resource division multiple access.
The primary only case has been compared to the coexistence scenarios with no mitigation, resource division and different IA techniques.
For the resource division approach in this context, we consider resource sharing between the primary and secondary systems in the time domain.
Furthermore, the PSR for the resource division technique increases slightly for lower values of N and remains constant at higher values of N.
Moreover, the uncoordinated IA technique protects almost 90% of the total primary rate and the resource division protects about 65% of the total primary rate.
Using numerical results, it is established that resource division multiple access is preferable for dense cellular systems, while cochannel interference allowance is advantageous for highly sparse cellular systems.
In this direction, reuse of time or frequency channel resources (resource division multiple access) could provide the necessary spatial separation amongst clusters, an approach which basically mimics the principles of the traditional cellular paradigm only on a cluster scale.
