Article Free Access Share on Insight lab: an immersive team environment linking paper, displays, and data Authors: Beth M. Lange Center for Strategic Technology Research, 3773 Willow Road, Northbrook, IL Center for Strategic Technology Research, 3773 Willow Road, Northbrook, ILView Profile , Mark A. Jones Center for Strategic Technology Research, 3773 Willow Road, Northbrook, IL Center for Strategic Technology Research, 3773 Willow Road, Northbrook, ILView Profile , James L. Meyers Center for Strategic Technology Research, 3773 Willow Road, Northbrook, IL Center for Strategic Technology Research, 3773 Willow Road, Northbrook, ILView Profile Authors Info & Claims CHI '98: Proceedings of the SIGCHI Conference on Human Factors in Computing SystemsJanuary 1998Pages 550–557https://doi.org/10.1145/274644.274718Published:01 January 1998Publication History 37citation776DownloadsMetricsTotal Citations37Total Downloads776Last 12 Months56Last 6 weeks10 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 Publisher SiteeReaderPDF

Article Free Access Share on Flexible list management in a directory Authors: H. V. Jagadish AT&T Labs-Research AT&T Labs-ResearchView Profile , Mark A. Jones AT&T Labs-Research AT&T Labs-ResearchView Profile , Divesh Srivastava AT&T Labs-Research AT&T Labs-ResearchView Profile , Dimitra Vista AT&T Labs-Research AT&T Labs-ResearchView Profile Authors Info & Claims CIKM '98: Proceedings of the seventh international conference on Information and knowledge managementNovember 1998 Pages 10–19https://doi.org/10.1145/288627.288636Online:01 November 1998Publication History 6citation234DownloadsMetricsTotal Citations6Total Downloads234Last 12 Months5Last 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 Alerts New Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

The increasing size and complexity of many software systems demand a greater emphasis on capturing and maintaining knowledge at many different levels within the software development process. This knowledge includes descriptions of the hardware and software components and their behavior, external and internal design specifications, and support for system testing. The Knowledge-based software engineering (KBSE) research paradigm is concerned with systems that use formally represented knowledge, with associated inference precedures, to support the various subactivities of software development. As they growing scale, KBSE systems must balance expressivity and inferential power with the real demands of knowledge base construction, maintenance, performance, and comprehensibility. Description logics (DLs) possess several features—a terminological orientation, a formal semantics, and efficient reasoning procedures—which offer an effective tradeoff of these factors. We discuss three KBSE systems in which DLs capture some of the requisite knowledge needed to support design, coding, and testing activities. We then survey some alternative approaches (to DLs) in KBSE systems. We close with a discussion of the benefits of DLs and ways to address some of their limitations.

A direct-sequence spread-spectrum communication system using an adaptive antenna array to null interference is examined. The system model is a modification of Compton's (1978) system, using a digital implementation and a directional constraint. Computer simulations are used to compare the behavior of the directionally constrained model with Compton's model with emphasis on spread-spectrum code synchronization. In the directed system, nulling of a tone jammer occurs without respect to direct-sequence code acquisition, and nulling of an off-beam desired signal occurs very slowly. Theoretical results are obtained by using the system covariance matrix, and incorporating the effects of spread-spectrum filtering to compute the system response as a function of time. The simulated results indicate that incomplete directional knowledge may be exploited to enhance signal quality and speed up code acquisition.>

We describe how movement is handled in a class of computational devices called active production networks (APNs). The APN model is a parallel, activation-based framework that has been applied to other aspects of natural language processing. The model is briefly defined, the notation and mechanism for movement is explained, and then several examples are given which illustrate how various conditions on movement can naturally be explained in terms of limitations of the APN device.