Uwe Roth

Modeling of time and document aging for request prediction—one step further

An important problem of prediction algorithms is the treatment of document aging and the change in user request behavior. This paper proposes a possibility to model time in a standard prediction scenario and analyses the results in a test environment. The knowledge of characteristics in the generated test sessions is also applied to real user logs to determine explicit values of implicit access log information. With this technique, client server communication on the Internet should be improved.

Advanced Studies on Link Proposals and Knowledge Retrieval of Hypertexts with CBR

In this paper, several problems in associating hyperlinks to text and the diverse possibilities to overcome these problems are discussed. At the current stage, an important aspect is knowledge retrieval of hypertexts. Our advanced studies on hyperlink management focus mainly on a concept similar to Case-Based Reasoning (CBR) systems as a possibility for the automatic generation of links for hypertexts in addition to traditional textual based methods. A detailed discussion of the basic ideas of CBR and an evaluation of its usefulness follows. Finally, methods to evaluate the quality of the proposals are described.

What Do Hyperlink-Proposals and Request-Prediction Have in Common?

This paper focuses on fundamental similarities between proposing links for hypertexts and predicting user-requests. It briefly outlines the theoretical background of both categories of problems and, as an example, explores common implementation strategies for handling them. Even though there are some important differences between link-proposals and prediction of requests, we believe that in regarding these categories as special cases of a more general and abstract mathematical model, improvements on the one side will also result in advantages for the other.

Routing based workflow for construction of distributed applications

Dynamic reconfiguration is absorbing more and more research focus for its increasing demand in inconstant distributed application. In This work we propose a routing based workflow to model the dataflow, runtime state and control management of cooperating components. Routing based workflow successfully realizes dynamic reconfiguration by the way of modifying routing structure and simplifies the hard problem of maintaining consistence into rather easy issue of synchronization. A detailed analysis is also given to show the great flexibility for construction of software architecture and potential applications.

A Flexible Middleware Platform with Piped Workflow

Middleware emerges as an excellent solution for the complicated distributed computing application. But as the appearance of new devices and new applications, the inflexibility of traditional middleware system becomes more serious and urgent. In this paper we propose a new flexible middleware platform which adopts the technologies of piped workflow and computational modules to provide a modular and extensible platform for future applications. The piped workflow provides a very flexible mechanism to organize all computational modules working together. During the running time, all computational modules communicate only with data channel of the piped workflow through which they can keep extremely independent, and the flexible flow control strategy makes the application programmer convenient to arrange all functional components for variable customer requirements.