Central-processing-unit schedulers have traditionally allocated resources fairly among processes. By contrast, a fair Share scheduler allocates resources so that users get their fair machine share over a long period.
Abstract.A core element of an adaptive hypertext systems is the user model. This paper describes Personis, a user model server. We describe the architecture, design and implementation. We also describe the way that it is intended to operate in conjunction with the rest of an adaptive hypertext system. A distinctive aspect of the Personis user model server follows from our concern for making adaptive systems scrutable: these enable users to see the details of the information held about them, the processes used to gather it and the way that it is used to personalise an adaptive hypertext. We describe how the architecture supports this. The paper describes our evaluations of the current server. These indicate that the approach and implementation provide a workable server for small to medium sized user collections of information needed to adapt the hypertext.
A disadvantage of Link State routing schemes is that exact shortest path calculations require a complete topology. which can overload the capacity of small nodes in a large network. Arca routing schemes (when destination names are structured corresponding to the network topology) allow nodes to reduce the size of routing tables, by recording only one cnuy for an entire region rather than one for each node in the region. We describe a general hierarchical routing scheme that allows all nodes to participate in a distributed routing network, using close to optimal paths, with short routing tables, and a reduction of topology information for minor nodes.
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