providing quality services to patients based on information technology (it) in a hospital which necessitates a suitable and implementable architecture. by searching on the internet and reputable iranian medical web sites and also by visiting the prestigious hospitals in tehran, nothing interesting was found about hospital enterprise architecture. in this paper, based on the two aspects of imple...

Thispaper describes a multi-Pentium architecture with a hierarchical memory and an II0 bus subsystem. On a board-level, this architecture achieves a very high-level of integration, by accommodating 8 Pentium processors with up to 2 Gigabytes of RAM. This hierarchical architechue has been extended to support multiple boards in a single cabinet as well as multiple cabinets connected via reflectiv...

Hierarchical multi-tenancy, which enables tenants to be divided into subtenants, is a flexible and scalable architecture for representing subsets of users and application resources in the real world. However, the resource isolation and sharing relations for tenants with hierarchies are more complicated than those between tenants in the flat Multi-Tenancy Architecture. In this paper, a hierarchi...

Traditional ad hoc networks have flat architecture, which suffers from poor scalability. Theoretical analysis and experimental results imply that throughput for each node decreases rapidly toward zero while the number of nodes increases in such architecture. Hierarchical architecture in ad hoc networks present a trade off between cellular networks and pure ad hoc networks, in that data may be f...

Grid technology is the collection of tools and services that integration widely distributed, heterogeneous, and multi-organizational resource. For better understanding grid’s structure, an object-oriented framework of C/A component is explored. Then, a hierarchical grid architecture combining data Grid, information Grid, and knowledge Grid is explored based on a general hierarchical grid archit...

Several structured peer-to-peer networks have been created to solve the scalability problem of previous peer-to-peer systems such as Gnutella and Napster. These peer-to-peer networks which support distributed hash table functionality construct a sort of structured overlay network, which can cause a topology mismatch between the overlay and the underlying physical network. To solve this mismatch...