Article Free Access Share on Consortium: a framework for transactions in collaborative environments Authors: Vram Kouramajian Knight-Ridder Information, Inc., Mountain View, CA and Information Technology Development, Rice University, Houston, Texas Knight-Ridder Information, Inc., Mountain View, CA and Information Technology Development, Rice University, Houston, TexasView Profile , Ross Dargahi Knight-Ridder Information, Inc., Mountain View, CA and Information Technology Development, Rice University, Houston, Texas Knight-Ridder Information, Inc., Mountain View, CA and Information Technology Development, Rice University, Houston, TexasView Profile , Jerry Fowler Center for Information Infrastructure and Computing Sciences, Baylor College of Medicine, Houston, TX and Information Technology Development, Rice University, Houston, Texas Center for Information Infrastructure and Computing Sciences, Baylor College of Medicine, Houston, TX and Information Technology Development, Rice University, Houston, TexasView Profile , Donald Baker Information Technology Development, Rice University, Houston, Texas Information Technology Development, Rice University, Houston, TexasView Profile Authors Info & Claims CIKM '95: Proceedings of the fourth international conference on Information and knowledge managementDecember 1995 Pages 260–265https://doi.org/10.1145/221270.221585Published:02 December 1995Publication History 1citation325DownloadsMetricsTotal Citations1Total Downloads325Last 12 Months0Last 6 weeks0 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

Article Free Access Share on The time index+: an incremental access structure for temporal databases Authors: Vram Kouramajian Department of Computer Science, The Wichita State University, Wichita, Kansas Department of Computer Science, The Wichita State University, Wichita, KansasView Profile , Ibrahim Kamel Department of Computer Science, University of Maryland, College Park, Maryland Department of Computer Science, University of Maryland, College Park, MarylandView Profile , Ramez Elmasri Computer Science Engineering Department, The University of Texas at Arlington, Arlington, Texas Computer Science Engineering Department, The University of Texas at Arlington, Arlington, TexasView Profile , Syed Waheed Computer Science Engineering Department, The University of Texas at Arlington, Arlington, Texas Computer Science Engineering Department, The University of Texas at Arlington, Arlington, TexasView Profile Authors Info & Claims CIKM '94: Proceedings of the third international conference on Information and knowledge managementNovember 1994 Pages 296–303https://doi.org/10.1145/191246.191298Online:29 November 1994Publication History 17citation423DownloadsMetricsTotal Citations17Total Downloads423Last 12 Months6Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my Alerts New Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

The Virtual Notebook System (VNS) is a distributed collaborative hypertext system that has made a successful transition from research prototype to commercial product. Experience in developing and deploying the VNS in diverse settings including biomedical research, undergraduate education, and collaborative system prototyping has developed insight into the use of systems for computer-supported cooperative work (CSCW). This paper provides a brief overview of the VNS, discusses some of its strengths and weaknesses with respect to collaboration, and draws some conclusions about the impact of metaphor and extensibility on the collaborative process.

This paper addresses the issues of declustering temporal index and access structures for a single processor multiple independent disk architecture. The temporal index is the Monotonic B/sup +/-Tree which uses the time index temporal access structure. We devise a new algorithm, called multi-level round robin, for assigning tree nodes to multiple disks. The multi-level round robin declustering technique takes advantage of the append-only nature of temporal databases to achieve uniform load distribution, decrease response time, and increase the fanout of the tree by eliminating the need to store disk numbers within the tree nodes. We propose two declustering techniques for the time index access structures; one considers only time proximity while declustering, whereas the other considers both time proximity and data size. We investigate their performance over different types of temporal queries and show that various temporal queries have conflicting allocation criteria for the time index buckets. In addition, we devise two disk partition techniques for the time index buckets. The mutually exclusive technique partitions the disks into disjoint groups, whereas the shared disk technique allows the different types of buckets to share all disks.>

Article Free Access Share on Temporal database modeling: an object-oriented approach Authors: Ramez Elmasri Computer Science Engineering Department, The University of Texas at Arlington, Arlington, Texas Computer Science Engineering Department, The University of Texas at Arlington, Arlington, TexasView Profile , Vram Kouramajian Office of The Vice President for Research & Information Technology, Rice University, P.O. Box 1892, Houston, Texas Office of The Vice President for Research & Information Technology, Rice University, P.O. Box 1892, Houston, TexasView Profile , Shian Fernando Computer Science Engineering Department, The University of Texas at Arlington, Arlington, Texas Computer Science Engineering Department, The University of Texas at Arlington, Arlington, TexasView Profile Authors Info & Claims CIKM '93: Proceedings of the second international conference on Information and knowledge managementDecember 1993 Pages 574–585https://doi.org/10.1145/170088.170429Published:01 December 1993Publication History 6citation841DownloadsMetricsTotal Citations6Total Downloads841Last 12 Months10Last 6 weeks4 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

The authors present a storage model for temporal databases that accommodates large amounts of temporal data. The model supports efficient search for object versions based on temporal conditions, using a time index. They define an access structure, the monotonic B/sup +/-tree, that is suitable for implementing a time index for append-only temporal databases. The storage model uses a combination of magnetic disks and write-once optical disks to keep current, past, and even future states of a database online and readily accessible. It provides an automatic archiving of both object versions and time index blocks to optical disks.>