Information Science

Analytic Method for Computing Instrument Pointing Jitter

Jitter can be computed more efficiently. A new method of calculating the root-mean-square (rms) pointing jitter of a scientific instrument (e.g., a camera, radar antenna, or telescope) is introduced based on a state-space concept. In comparison with the prior method of calculating the rms pointing jitter, the present method involves significantly less computation.

Posted in: Information Sciences, Briefs, TSP

Read More >>

Quantum Search in Hilbert Space

A large database would be searched in one quantum computing operation. A proposed quantum-computing algorithm would perform a search for an item of information in a database stored in a Hilbert-space memory structure. The algorithm is intended to make it possible to search relatively quickly through a large database under conditions in which available computing resources would otherwise be considered inadequate to perform such a task.

Posted in: Information Sciences, Briefs, TSP

Read More >>

Wavelet-Based Real-Time Diagnosis of Complex Systems

Changes in hardware and software can be simultaneously examined for signs of loss of control. A new method of robust, autonomous real-time diagnosis of a time-varying complex system (e.g., a spacecraft, an advanced aircraft, or a process-control system) is presented here. It is based upon the characterization and comparison of (1) the execution of software, as reported by discrete data, and (2) data from sensors that monitor the physical state of the system, such as performance sensors or similar quantitative time-varying measurements. By taking account of the relationship between execution of, and the responses to, software commands, this method satisfies a key requirement for robust autonomous diagnosis, namely, ensuring that control is maintained and followed.

Posted in: Information Sciences, Briefs, TSP

Read More >>

Coupled-Layer Architecture for Advanced Software for Robots

Decision-making and functional infrastructures interact at all levels of granularity. The title "Coupled Layer Architecture for Robotics Autonomy" (CLARATy) refers to a software architecture for robots that has been proposed to (1) improve the modularity of robotic-system software while (2) tightening the coupling between autonomy and control software subsystems. Whereas prior robotic architectures have typically been characterized by three layers, the CLARATy is characterized by only two layers. The CLARATy provides for interaction of decision-making and functional infrastructures at all levels of system granularity. This architecture is flexible enough to encompass research and application domains, and provides for an explicit coupling of artificial-intelligence and robotics techniques. The architecture is also implemented in an object-oriented fashion that makes it possible to leverage software design through both inheritance and aggregation, thereby eliminating the need for duplication of effort in the development of new software.

Posted in: Information Sciences, Briefs, TSP

Read More >>

Characteristics of Dynamics of Intelligent Systems

These characteristics are proposed as means of discriminating between living and nonliving systems. An investigation of nonlinear mathematical models of dynamics has led to the selection of characteristics that could be useful for distinguishing mathematically between the behaviors of (1) intelligent or living systems and (2) nonliving systems. As contemplated here, an intelligent or living system could range from a natural or artificial single-cell organism at one extreme to the whole of human society at the other extreme, whereas a nonliving system could be, for example, a collection of interacting particles or mechanisms. Among other findings, the investigation has revealed that living systems can be characterized by nonlinear evolution of probability distributions over different possible choices of the next steps in their motions.

Posted in: Information Sciences, Briefs, TSP

Read More >>

Decision Support for Emergency Operations Centers

The Flood Disaster Mitigation Decision Support System (DSS) is a computerized information system that allows regional emergency-operations government officials to make decisions regarding the dispatch of resources in response to flooding.

Posted in: Information Sciences, Briefs

Read More >>

NASA Records Database

The NASA Records Database, comprising a Web-based application program and a database, is used to administer an archive of paper records at Stennis Space Center. The system begins with an electronic form, into which a user enters information about records that the user is sending to the archive.

Posted in: Information Sciences, Briefs

Read More >>

White Papers

Medical Capabilities Brochure
Sponsored by Nordson EFD
Synthetic Sapphire: Extreme Performer
Sponsored by Goodfellow
The Ultimate Shaft-To-Hub Connection
Sponsored by Stoffel Polygon
Interaction of Intermodulation Products between DUT and Spectrum Analyzer
Sponsored by Rohde and Schwarz A and D
White Paper: Computer System Design for Critical Applications
Sponsored by Sealevel
The Aerospace Industry Takes a Fresh Look at Its Wire Harness Design Approach
Sponsored by Mentor Graphics

White Papers Sponsored By: