Orbiter Flying Qualities (OFQ) Workstation user's guide

This project was devoted to the development of a software package, called the Orbiter Flying Qualities (OFQ) Workstation, for working with the OFQ Archives which are specially selected sets of space shuttle entry flight data relevant to flight control and flying qualities. The basic approach to creation of the workstation software was to federate and extend commercial software products to create a low cost package that operates on personal computers. Provision was made to link the workstation to large computers, but the OFQ Archive files were also converted to personal computer diskettes and can be stored on workstation hard disk drives. The primary element of the workstation developed in the project is the Interactive Data Handler (IDH) which allows the user to select data subsets from the archives and pass them to specialized analysis programs. The IDH was developed as an application in a relational database management system product. The specialized analysis programs linked to the workstation include a spreadsheet program, FREDA for spectral analysis, MFP for frequency domain system identification, and NIPIP for pilot-vehicle system parameter identification. The workstation also includes capability for ensemble analysis over groups of missions

Virtual Machines and Networks - Installation, Performance Study, Advantages and Virtualization Options

The interest in virtualization has been growing rapidly in the IT industry because of inherent benefits like better resource utilization and ease of system manageability. The experimentation and use of virtualization as well as the simultaneous deployment of virtual software are increasingly getting popular and in use by educational institutions for research and teaching. This paper stresses on the potential advantages associated with virtualization and the use of virtual machines for scenarios, which cannot be easily implemented and/or studied in a traditional academic network environment, but need to be explored and experimented by students to meet the raising needs and knowledge-base demanded by the IT industry. In this context, we discuss various aspects of virtualization - starting from the working principle of virtual machines, installation procedure for a virtual guest operating system on a physical host operating system, virtualization options and a performance study measuring the throughput obtained on a network of virtual machines and physical host machines. In addition, the paper extensively evaluates the use of virtual machines and virtual networks in an academic environment and also specifically discusses sample projects on network security, which may not be feasible enough to be conducted in a physical network of personal computers; but could be conducted only using virtual machines

Scoping Study for a Realistic Driving Simulator: Final Report.

1. INTRODUCTION This report documents the results of a study carried out between December 1989 and March 1990 to determine the most suitable equipment to be purchased for building a driving simulator at the Institute for Transport Studies at the University of Leeds. This "scoping study" was intended to accomplish three main tasks: 1. A review of existing facilities both in the UK and elsewhere in Europe to ascertain what has already been achieved and what is the current state of the art. 2. Initial discussions with potential users on desired features to be built in to the simulator. 3. Discussions with equipment suppliers in the light of what was found out in Tasks 1 and 2, so that the appropriate equipment could be specified. The report documents in subsequent sections the findings of the first two tasks. It then summarizes the conclusions that were reached on the overall simulator design, on the required features of the simulator and on the effort required to develop an operational simulator from the various hardware components. Finally, recommendations are made on the equipment to be purchased in the light of the recommended configuration, the discussion with equipment suppliers under Task 3 and the budget allocated

Functional requirements document for the Earth Observing System Data and Information System (EOSDIS) Scientific Computing Facilities (SCF) of the NASA/MSFC Earth Science and Applications Division, 1992

Five scientists at MSFC/ESAD have EOS SCF investigator status. Each SCF has unique tasks which require the establishment of a computing facility dedicated to accomplishing those tasks. A SCF Working Group was established at ESAD with the charter of defining the computing requirements of the individual SCFs and recommending options for meeting these requirements. The primary goal of the working group was to determine which computing needs can be satisfied using either shared resources or separate but compatible resources, and which needs require unique individual resources. The requirements investigated included CPU-intensive vector and scalar processing, visualization, data storage, connectivity, and I/O peripherals. A review of computer industry directions and a market survey of computing hardware provided information regarding important industry standards and candidate computing platforms. It was determined that the total SCF computing requirements might be most effectively met using a hierarchy consisting of shared and individual resources. This hierarchy is composed of five major system types: (1) a supercomputer class vector processor; (2) a high-end scalar multiprocessor workstation; (3) a file server; (4) a few medium- to high-end visualization workstations; and (5) several low- to medium-range personal graphics workstations. Specific recommendations for meeting the needs of each of these types are presented

Flexible working policies and environments in UK Local Authorities: current practice

The research surveys the uptake of 'modern' or flexible working practices in UK Local Authorities, especially as it impacts on property and office accommodation. Nearly all permit flexible starting and finishing times for as many employees as is practical while forms of accredited hours working for at least some appropriate employees are policy in a majority. Flexible practices with property and ICT implications, working from home without a dedicated work station, formal policies, 'hot' desking, flexible offices and satellite or drop-in offices are less common (ca 10%) but have grown significantly in the last two years. A number of councils also report being at the stage of planning pilots. Five detailed case studies are reported. Three authorities have expanding strategic programmes for 'workstyle' changes or new ways of working. One has shifted its emphasis away from such plans toward higher density office usage only and one was awaiting the election result before anticipated permission to start. These cases do all come from authorities in areas of much higher than average property values and costs. While they have seen savings, they emphasise that the initiatives were equally about better work life balance and improved office environments. Green benefits and service enhancements are harder to quantify but are believed to have been achieved. Higher density of net space utilisation has uniformly been achieved. Executive commitment and clear member support are seen as critical strategic success factors. Clear liaison between HR, Property/ Facilities and ICT has been essential to operational success. Entrenched management attitudes and, at least initially, staff reluctance to change, are cited as the major drawbacks. Accounting and valuation practices can also be a barrier. Similar messages are provided by a variety of pilots, some undertaken deliberately as strategic tests, others as much more of an ad hoc response to local circumstances. Most have not, or not yet, seen net office space reduced. The more successful pilots were not 'just' either property or HR policy initiatives: indeed there is some evidence that initiatives involving only one of the two functions have been less successful. Service areas most frequently cited as being involved in changes are various property functions. Trading Standards and Social Services are other areas where the real or potential development of flexible working and shared desking is highlighted though the latter in particular is also cited as an area where workers in the office have particular mutual support needs. Higher density officing for less mobile workers is, in principle, an option more widely available. Workplace strategy should reflect future service delivery models, asset management plans and organisational development. New ways of working have been a tool for achieving changes in culture and delivery, but were, and are, a challenge to traditional mindsets. They will involve senior property professionals in a range of issues with which they have not traditionally been associated. Future property and workplace strategy will be driven by an authority's service models and aspirations as to working culture: but will also be a tool, alongside organisational development (OD) and ICT, to achieve change and improvement

The Design of a System Architecture for Mobile Multimedia Computers

This chapter discusses the system architecture of a portable computer, called Mobile Digital Companion, which provides support for handling multimedia applications energy efficiently. Because battery life is limited and battery weight is an important factor for the size and the weight of the Mobile Digital Companion, energy management plays a crucial role in the architecture. As the Companion must remain usable in a variety of environments, it has to be flexible and adaptable to various operating conditions. The Mobile Digital Companion has an unconventional architecture that saves energy by using system decomposition at different levels of the architecture and exploits locality of reference with dedicated, optimised modules. The approach is based on dedicated functionality and the extensive use of energy reduction techniques at all levels of system design. The system has an architecture with a general-purpose processor accompanied by a set of heterogeneous autonomous programmable modules, each providing an energy efficient implementation of dedicated tasks. A reconfigurable internal communication network switch exploits locality of reference and eliminates wasteful data copies

The virtual environment display system

Virtual environment technology is a display and control technology that can surround a person in an interactive computer generated or computer mediated virtual environment. It has evolved at NASA-Ames since 1984 to serve NASA's missions and goals. The exciting potential of this technology, sometimes called Virtual Reality, Artificial Reality, or Cyberspace, has been recognized recently by the popular media, industry, academia, and government organizations. Much research and development will be necessary to bring it to fruition

A report on the USL NASA/RECON project. Part 2: PC-based R and D in support of IS and R applications

This Working Paper Series entry describes the PC R and D development effort initiated as part of the NASA/RECON Project at the University of Southwestern Louisiana. This effort involves the development of a PC-based environment for the prototyping and evaluation of various tools designed to enhance the interaction between scientists and engineers and remote information systems. The design of PC-based tools for the enhancement of the NASA/RECON university-level courses is described as well as the design of a multi-functional PC-based workstation to support access to and processing of information from local, distributed, and remote sources. Course preparation activities are described in a companion report entitled A Report on the USL NASA/RECON Project: Part 1, the Development of a Transportable, University-Level, IS and R Educational Program, by Suzy Gallagher and Martin Granier, USL/DBMS NASA/RECON Working Paper Series report number DBMS.NASA/RECON-7

Fragmentation of confidential objects for data processing security in distributed systems

This paper discusses how object orientation in application design enables confidentiality aspects to be handled more easily than in conventional approaches. The idea, based on object fragmentation at design time, is to reduce processing in confidential objects; the more non confidential objects can be produced at design-time, the more application objects can be processed on untrusted shared computers. Still confidential objects must be processed on non shared trusted workstations. Rules and limits of object fragmentation are discussed together with some criteria evaluating trade-offs between fragmentation and performance