Karen Witting

A publishing system for efficiently creating dynamic Web content

This paper presents a publishing system for efficiently creating dynamic Web content. Complex Web pages are constructed from simpler fragments. Fragments may recursively embed other fragments. Relationships between Web pages and fragments are represented by object dependence graphs. We present algorithms for efficiently detecting and updating Web pages affected after one or more fragments change. We also present algorithms for publishing sets of Web pages consistently; different algorithms are used depending upon the consistency requirements. Our publishing system provides an easy method for Web site designers to specify and modify inclusion relationships among Web pages and fragments. Users can update content on multiple Web pages by modifying a template. The system then automatically updates an Web pages affected by the change. Our system accommodates both content that must be proof-read before publication and is typically from humans as well as content that has to be published immediately and is typically from automated feeds. Our system is deployed at several popular Web sites including the 2000 Olympic Games Web site. We discuss some of our experiences with real deployments of our system as well as its performance.

A fragment-based approach for efficiently creating dynamic web content

This article presents a publishing system for efficiently creating dynamic Web content. Complex Web pages are constructed from simpler fragments. Fragments may recursively embed other fragments. Relationships between Web pages and fragments are represented by object dependence graphs. We present algorithms for efficiently detecting and updating Web pages affected after one or more fragments change. We also present algorithms for publishing sets of Web pages consistently; different algorithms are used depending upon the consistency requirements.Our publishing system provides an easy method for Web site designers to specify and modify inclusion relationships among Web pages and fragments. Users can update content on multiple Web pages by modifying a template. The system then automatically updates all Web pages affected by the change. Our system accommodates both content that must be proofread before publication and is typically from humans as well as content that has to be published immediately and is typically from automated feeds.We discuss some of our experiences with real deployments of our system as well as its performance. We also quantitatively present characteristics of fragments used at a major deployment of our publishing system including fragment sizes, update frequencies, and inclusion relationships.

Century: Automated Aspects of Patient Care

Remote health monitoring affords the possibility of improving the quality of health care by enabling relatively inexpensive out-patient care. However, remote health monitoring raises new a problem: the potential for data explosion in health care systems. To address this problem, the remote health monitoring systems must be integrated with analysis tools that provide automated trend analysis and event detection in real time. In this paper, we propose an overview of Century, an extensible framework for analysis of large numbers of remote sensor-based medical data streams.

Health Information Exchange: Integrating the Healthcare Enterprise (IHE)

The effective and accurate exchange of information within and between healthcare organizations is dependent on the use of health information standards by all participants in the collection, use, and exchange of information. Numerous Standards Development Organizations (SDOs) create and maintain a variety of health information standards, all of which are intended to support interoperability. Integrating the Healthcare Enterprise (IHE) supports interoperability though the inclusion of key health information standards in profiles that are developed through a collaborative process directed toward priority health information needs.

Monitoring distributed systems: a publish/subscribe methodology and architecture

To support complex, rapidly changing, high-volume Web sites many components contribute to keeping the content current. Monitoring the workflow through all these components is a challenging task. This paper describes a system in which monitoring objects created by the various heterogeneous, distributed components are distributed to any application choosing to present monitoring information.

Monitoring Distributed Systems

To support complex, rapidly changing, high-volume websites many components contribute to keeping the content current. Monitoring the workflow through all these components is a challenging task. This paper describes a system in which monitoring objects created by the various heterogeneous, distributed components are distributed to any application choosing to present monitoring information.