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  • Computer Programming and Software  (258)
  • 2020-2023
  • 2000-2004  (258)
  • 1970-1974
  • 2002  (258)
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  • 2020-2023
  • 2000-2004  (258)
  • 1970-1974
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  • 1
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    Method for distributed object communications based on dynamically acquired and assembled software components (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: A method for acquiring and assembling software components at execution time into a client program, where the components may be acquired from remote networked servers is disclosed. The acquired components are assembled according to knowledge represented within one or more acquired mediating components. A mediating component implements knowledge of an object model. A mediating component uses its implemented object model knowledge, acquired component class information and polymorphism to assemble components into an interacting program at execution time. The interactions or abstract relationships between components in the object model may be implemented by the mediating component as direct invocations or indirect events or software bus exchanges. The acquired components may establish communications with remote servers. The acquired components may also present a user interface representing data to be exchanged with the remote servers. The mediating components may be assembled into layers, allowing arbitrarily complex programs to be constructed at execution time.
    Keywords: Computer Programming and Software
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Conceptual Study of Intelligent Data Archives of the Future (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: A conceptual architecture study is under way to address the problem of getting the most scientific value from the large volumes of Earth and space science data that NASA expects to accumulate in the future. This involves efficient storage and access, but goes beyond that to facilitate intelligent data understanding and utilization through modeling realistic virtual entities with predictive capabilities. The objective of the study is to formulate ideas and concepts and to provide recommendations that lead to prototyping and implementation in the period from 2010 to 2020. The approach consists of the definition of future scenarios and needs for data usage in applications (in consultation with scientific and applications users), projection of advances in technologies, and an abstraction of an intelligent archive architecture. Strategic evolution is considered in various areas such as storage, data, information and knowledge management, data ingest and mining, user interfaces, and advances in intelligent data understanding algorithms.
    Keywords: Computer Programming and Software
    Type: Tenth Goddard Conference on Mass Storage Systems and Technologies in cooperation with the Nineteenth IEEE Symposium on Mass Storage Systems; 75-91; NASA/CP-2002-210000
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    FY 2002 Report on Software Visualization Techniques for IV and V (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: One of the major challenges software engineers often face in performing IV&V is developing an understanding of a system created by a development team they have not been part of. As budgets shrink and software increases in complexity, this challenge will become even greater as these software engineers face increased time and resource constraints. This research will determine which current aspects of providing this understanding (e.g., code inspections, use of control graphs, use of adjacency matrices, requirements traceability) are critical to the performing IV&V and amenable to visualization techniques. We will then develop state-of-the-art software visualization techniques to facilitate the use of these aspects to understand software and perform IV&V.
    Keywords: Computer Programming and Software
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    NASA TECHNICAL REPORTS
  • 4
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    Software Safety Assurance of Programmable Logic (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Programmable Logic (PLC, FPGA, ASIC) devices are hybrids - hardware devices that are designed and programmed like software. As such, they fall in an assurance gray area. Programmable Logic is usually tested and verified as hardware, and the software aspects are ignored, potentially leading to safety or mission success concerns. The objective of this proposal is to first determine where and how Programmable Logic (PL) is used within NASA and document the current methods of assurance. Once that is known, raise awareness of the PL software aspects within the NASA engineering community and provide guidance for the use and assurance of PL form a software perspective.
    Keywords: Computer Programming and Software
    Type: OSMA Software Assurance Symposium 2002; Jan 01, 2002; Unknown
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Bi-Level Integrated System Synthesis (BLISS) for Concurrent and Distributed Processing (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The paper introduces a new version of the Bi-Level Integrated System Synthesis (BLISS) methods intended for optimization of engineering systems conducted by distributed specialty groups working concurrently and using a multiprocessor computing environment. The method decomposes the overall optimization task into subtasks associated with disciplines or subsystems where the local design variables are numerous and a single, system-level optimization whose design variables are relatively few. The subtasks are fully autonomous as to their inner operations and decision making. Their purpose is to eliminate the local design variables and generate a wide spectrum of feasible designs whose behavior is represented by Response Surfaces to be accessed by a system-level optimization. It is shown that, if the problem is convex, the solution of the decomposed problem is the same as that obtained without decomposition. A simplified example of an aircraft design shows the method working as intended. The paper includes a discussion of the method merits and demerits and recommendations for further research.
    Keywords: Computer Programming and Software
    Type: AIAA Paper 2002-5409 , 9th AIAA/NASA/USAF/ISSMO Symposium on Multidisciplinary Analysis and Optimization; Sep 04, 2002 - Sep 06, 2002; Atlanta, GA; United States
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    NASA TECHNICAL REPORTS
  • 6
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    What's coming in Fortran 2000 (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Keywords: Computer Programming and Software
    Type: Workshop on the Mathematics of Mathematical Software; June, 1-4 2002; Portland, OR; United States
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    NASA TECHNICAL REPORTS
  • 7
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    Using CONFIG for Simulation of Operation of Water Recovery Subsystems for Advanced Control Software Evaluation (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: A hybrid discrete/continuous simulation tool, CONFIG, has been developed to support evaluation of the operability life support systems. CON FIG simulates operations scenarios in which flows and pressures change continuously while system reconfigurations occur as discrete events. In simulations, intelligent control software can interact dynamically with hardware system models. CONFIG simulations have been used to evaluate control software and intelligent agents for automating life support systems operations. A CON FIG model of an advanced biological water recovery system has been developed to interact with intelligent control software that is being used in a water system test at NASA Johnson Space Center
    Keywords: Computer Programming and Software
    Type: 02ICES-114 , JSC-CN-7399 , 32d International Conference on Environmental Systems (ICES); 15-`18 Jul. 2002; San Antonio, TX; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Descriptive Study Analyzing Discrepancies in a Software Development Project Change Request (CR) Assessment Process and Recommendations for Process Improvements (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: The Change Request (CR) assessment process is essential in the display development cycle. The assessment process is performed to ensure that the changes stated in the description of the CR match the changes in the actual display requirements. If a discrepancy is found between the CR and the requirements, the CR must be returned to the originator for corrections. Data will be gathered from each of the developers to determine the type of discrepancies and the amount of time spent assessing each CR. This study will determine the most common types of discrepancies and the amount of time spent assessing those issues. The results of the study will provide a foundation for future improvements as well as a baseline for future studies.
    Keywords: Computer Programming and Software
    Type: JSC-CN-7640
    Format: application/pdf
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  • 9
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    Software for Estimating Costs of Testing Rocket Engines (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: A high-level parametric mathematical model for estimating the costs of testing rocket engines and components at Stennis Space Center has been implemented as a Microsoft Excel program that generates multiple spreadsheets. The model and the program are both denoted, simply, the Cost Estimating Model (CEM). The inputs to the CEM are the parameters that describe particular tests, including test types (component or engine test), numbers and duration of tests, thrust levels, and other parameters. The CEM estimates anticipated total project costs for a specific test. Estimates are broken down into testing categories based on a work-breakdown structure and a cost-element structure. A notable historical assumption incorporated into the CEM is that total labor times depend mainly on thrust levels. As a result of a recent modification of the CEM to increase the accuracy of predicted labor times, the dependence of labor time on thrust level is now embodied in third- and fourth-order polynomials.
    Keywords: Computer Programming and Software
    Type: NASA/NP-2002-06-00024-SSC
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Software Assists in Extensive Environmental Auditing (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The Base Enivronmental Management System (BEMS) is a Web-based application program for managing and tracking audits by the Environmental Office of Stennis Space Center in conformity with standard 14001 of the International Organization for Standardization (ISO 14001). (This standard specifies requirements for an environmental-management system.) BEMS saves time by partly automating what were previously manual processes for creating audit checklists; recording and tracking audit results; issuing, tracking, and implementing corrective-action requests (CARs); tracking continuous improvements (CIs); and tracking audit results and statistics. BEMS consists on an administration module and an auditor module. As its name suggests, the administration module is used to administer the audit. It helps administrators to edit the list of audit questions; edit the list of audit locations; assign manditory questions to locations; track, approve, and edit CARs; and edit completed audits. The auditor module is used by auditors to perform audits and record audit results: It helps the auditors to create audit checklists, complete audits, view completed audits, create CARs, record and acknowledge CIs, and generate reports from audit results.
    Keywords: Computer Programming and Software
    Type: NASA/NP-2002-10-00039-SSC
    Format: text
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