A conformance test is a software assurance test that is applied in order to determine if specification requirements of the software are being met. It is a time-independent model, where the software object is subjected to an a priori known test suite. The reliability of the software is the probability that it will function properly for values in the input space. Because the input space is usually very large, it is impossible to sample all input values, so in order to provide better sampling coverage, the input space is partitioned into homogeneous subspaces. Samples are drawn from each subspace for testing the software. The conformance tests based on these samples are required to pass all tests in the test suite. Based on these data, the classical statistical estimate of reliability is one. Such an estimate may be unrealistic if the sample sizes are not large. Even in such a scenario a nontrivial confidence interval is provided for the reliability.

Accurate control of streamline density is key to producing several effective forms of visualization of two-dimensional vector fields.We introduce a technique that uses an energy function to guide the placement of streamlines at a specified density.This energy function uses a low-pass filtered version of the image to measure the difference between the current image and the desired visual density.We reduce the energy (and thereby improve the placement of streamlines) by ( 1) changing the positions and lengths of streamlines, (2) joining streamlines that nearly abut, and (3) creating new streamlines to fill sufficiently large gaps.The entire process is iterated to produce streamlines that are neither too crowded nor too sparse.The resulting streamlines manifest a more hand-placed appearance than do regularly-or randomly-placed streamlines.Arrows can be added to the streamlines to disambiguate flow direction, and flow magnitude can be represented by the thickness, density, or intensity of the lines.

Image metamorphoses (morphing) is a powerful and easy-to-use tool for generating new 2D images from existing 2D images. In recent years morphing has become popular as an artistic tool and is used extensively in the entertainment industry. In this paper we describe a new technique for controlled, feature-based metamorphosis of certain types of surfaces in 3-space; it applies well-understood 2D methods to produce shape metamorphosis between 3D models in a 2D parametric space. We also describe an interactive implementation on a parallel graphics multicomputer, which allows the user to define, modify and examine the 3D morphing process in real time.

With current low-cost high-performance workstations, application-to-application throughput is limited more by host memory bandwidth than by the cost of protocol processing. Conventional network architectures are inefficient in their use of this memory bandwidth, because data is copied several times between the application and the network. As network speeds increase further, network architectures must be developed that reduce the demands on host memory bandwidth. The authors discuss the design of a single-copy network architecture, where data is copied directly between the application buffer and the network interface. Protocol processing is performed by the host, and transport layer buffering is provided on the network interface. They describe a prototype implementation for the HP Apollo Series 700 workstation family that consists of an FDDI network interface and a modified 4.3BSD TCP/IP protocol stack, and report some early results that demonstrate twice the throughput of a conventional network architecture and significantly lower latency.>

Article Free Access Share on Interactive manipulation and display of surfaces in four dimensions Author: David Banks View Profile Authors Info & Claims I3D '92: Proceedings of the 1992 symposium on Interactive 3D graphicsJune 1992 Pages 197–207https://doi.org/10.1145/147156.147205Online:01 June 1992Publication History 18citation735DownloadsMetricsTotal Citations18Total Downloads735Last 12 Months13Last 6 weeks8 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

Scheduling group meetings requires access to participants' calendars, typically located in scattered pockets or desks. Placing participants' calendars on-line and using a rule-based scheduler to find a time slot would alleviate the problem to some extent, but it often is difficult to trust the results, because correct scheduling rules are elusive, varying with the participants and the agenda of a particular meeting. What's needed is a comprehensive scheduling system that summarizes the available information for quick, flexible, and reliable scheduling. We have developed a prototype of a priority-based, graphical scheduling system called Visual Scheduler (VS).