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Aerospace and Electronics Conference, 2008. NAECON 2008. IEEE National

Date 16-18 July 2008

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Displaying Results 1 - 25 of 82
  • [Commentary]

    Publication Year: 2008 , Page(s): 1 - 3
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    Freely Available from IEEE
  • [Commentary]

    Publication Year: 2008 , Page(s): 1 - 45
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    Freely Available from IEEE
  • [Society related mateiral]

    Publication Year: 2008 , Page(s): 1 - 86
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    Freely Available from IEEE
  • Contributor listings

    Publication Year: 2008 , Page(s): 1 - 5
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    Freely Available from IEEE
  • Table of contents

    Publication Year: 2008 , Page(s): 1 - 10
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    Freely Available from IEEE
  • Author index

    Publication Year: 2008 , Page(s): 1 - 6
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    Freely Available from IEEE
  • [Breaker page]

    Publication Year: 2008 , Page(s): 1
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    Freely Available from IEEE
  • Collaborative Decision Support for Layered Sensor Webs

    Publication Year: 2008 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5417 KB) |  | HTML iconHTML  

    Collaborative decision support is critical to providing the warfighter much-needed Universal situational awareness (USA) and a better understanding of information flowing from complex sensor webs. USA requires the ability to rapidly correlate sensor data and provide easy-to-understand collaborative decision support tools. The design knowledge company (TDKC) is currently developing the XTM collaborative argumentation toolkit (XCAT) for the air force research Laboratory's (AFRL) sensors directorate. XCAT will provide a capability to: (1) manage sensor data streams; (2) collaborate with other entities to facilitate the decision process; (3) parameterize sensor network health and status ;(4) correlate the sensor information with other intelligence data; and (5) provide argumentation tools to augment decision making and course-of-action selection. View full abstract»

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  • Multi-modal Advanced Technology for Real-Time Information eXchange (MATRIX)

    Publication Year: 2008 , Page(s): 6 - 9
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4855 KB) |  | HTML iconHTML  

    This research and development concentrates on the progress achieved to-date in reference to the establishment of a multi-modal collaboration framework for use in any type of information technology related infrastructure. The framework builds on the knowledge and experience achieved in the developmental phase of the multi-modal advanced technologies for real-time information exchange (MATRIX) framework which was funded by the Department of Defense as a Small Business Innovative Research (SBIR) phase II effort. Completely pluggable and robust, MATRIX will act as the omnipresent application-interface meant to serve any type of collaborative environment including the human to human, resource to resource, and human to resource collaborative functions. To better service current and future customers, the MATRIX framework leverages open source technologies to join all customer requirements with the latest in cutting edge technology. View full abstract»

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  • Communication And Collaboration Cognition Systems: A Sociological Process For Integrating Standalone Technologies With The Global Information Grid

    Publication Year: 2008 , Page(s): 10 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (12082 KB) |  | HTML iconHTML  

    This thought experiment discusses concepts that should be considered when performing systems integration and systems engineering efforts applicable to integrating standalone avionic and electronic cognition systems to attain complex adaptive communication and collaboration capabilities. The concepts are artificial sensory and cognition systems; biomimetics; engineering and systems engineering memes; and informational silos and their relationships to memes and memes integration problems. Put simply, from a problematic perspective, one problem is the following: Design and development teams oftentimes encounter technical challenges when attempting to integrate standalone, biomimetically-based, communication and collaboration cognition systems that were not designed to be integrated with other systems. A second problem is the following: Design and development teams oftentimes integrate systems based only on their machine-centered designs and functions and without consideration of human factor elements such as informational silos, memes and corporate cultures. A third problem is the following: Teams might encounter other systems integration and systems engineering problems and roadblocks too such as proprietary information; perceptual lenses; blind spots; and interdisciplinary and professional prejudgments, parochialisms and stereotypes. The latter can also interfere with efforts to integrate standalone systems (developed by different companies) and can also interfere with the systems being capable of providing individually attained information into command and control networks within required response times. Use of sociological processes related to holistic systems engineering, systems thinking and non-traditional professionals can be used to solve people-rated problems, to categorized unknowns for mitigating risks, and to then perform systems integration regarding communication and collaboration cognition systems. View full abstract»

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  • Affordable Design Solutions based on Colaboratilve Decision Techniques

    Publication Year: 2008 , Page(s): 20 - 25
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6314 KB) |  | HTML iconHTML  

    When acquiring air force (AF) weapon systems, the department of defense now demands more performance for less cost. AF systems cannot be acquired simply for greater performance, but must be balanced against the cost to arrive at a "best value" investment. Increasing the insight into performance, cost and risk trade-offs early in the product design process is key to enabling affordable AF solutions to be created and deployed. Frontier Technology, Inc. (FTI) has matured a decision support infrastructure that is built upon the integration of DoD-accepted decision-making methods combined with unique, collaborative insight into technical parameters driving cost. The FTI integrated cost as an independent variable (I-CAIV) tool facilitates the documentation of both AF high-level capabilities as well as the generation of multiple stakeholder and/or warfighter priorities. This structure includes performance requirements that are linked to objectives and thresholds in a manner that enables users to understand how requirements "drive" cost during the design process. FTI has developed this collaborative infrastructure from multiple DoD SBIRs focused on different aspects of affordability analysis. The Air Force, Army, and Navy have awarded SBIR efforts to mature collaborative infrastructure and integrate different DoD community-accepted data sources into the I-CAIV process and framework. These investments have resulted in a tool that can be used to visualize performance, cost, risk and schedule of multiple alternatives in threedimensionsidentifying the "knee of the performance vs. cost curve. View full abstract»

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  • Trust and Decision Making: An Empirical Platform (CCP 204)

    Publication Year: 2008 , Page(s): 26 - 30
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6054 KB) |  | HTML iconHTML  

    The trust literature emphasizes trust in automation, thus neglecting the interpersonal aspects of how distributed personnel develop trust. Interpersonal trust represents the willingness of individuals to accept vulnerabilities from the actions of others. Vulnerability is critical aspect of trust research, yet few studies have manipulated vulnerability. Non-verbal cues may have an influence on the trust process, suggesting that features of collaborative tools may influence how individuals build trust. The present study will implement a 3times4 mixed design. Participants will select a convoy route based on: 1) graphical displays of enemy zones and historical Improvised Explosive Device (IED) occurrences; 2) route parameters (e.g., fuel required); and 3) information from a local expert. Vulnerability will be manipulated by altering the frequency of IEDs and the location of `red forces' to create low, moderate, and high vulnerability conditions (within subjects factor). Information from local experts will be presented via one of four conditions: 1) audio/video with low emotion; 2) audio/video with high emotion; and 3) audio only; and 4) chat (between subjects factor). Findings from this research will support the development of new collaborative tools for the Command and Control (C2) domain. View full abstract»

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  • Attribute Based Access Control and Security for Collaboration Environments

    Publication Year: 2008 , Page(s): 31 - 35
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5396 KB) |  | HTML iconHTML  

    Proliferation of collaboration environments brings new issues to the area of security. In this paper, we briefly describe the characteristics of security associated with collaboration environments. We also discuss and analyze several schemes in different areas of security, including access control, secure group communication, and security management. Another contribution of this paper is a proposed access control model with more flexibility and ability to address trust and privacy preserving issues based on attributes. View full abstract»

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  • Aristotle - A Social Networking Solution Designed and Built for the Air Force Research Laboratory

    Publication Year: 2008 , Page(s): 36 - 40
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2639 KB) |  | HTML iconHTML  

    Aristotle is a social networking solution designed and built for the Air Force Research Laboratory (AFRL). Aristotle is a Web 2.0 based application utilizing PeoplePoint Systems' developed user interface (UI) and optimized graph data model technology. Aristotle started as a science & technology (S&T) project, exploring ways to enhance AFRL's situational awareness. The specific AFRL design goal was to make it easy for people to identify, connect, and collaborate with AFRL people and provide intuitive access to comprehensive data about AFRL projects. View full abstract»

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  • Modeling and Design of Super High Speed Permanent Magnet Synchronous Motor (PMSM)

    Publication Year: 2008 , Page(s): 41 - 44
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4309 KB) |  | HTML iconHTML  

    Because of the advantages of compact size and high efficiency, today PMSM motor has attracted the attention in aerospace applications. We have designed a super high speed PMSM motor with 92% efficiency novel for a cryo-cooler compressor for NASA recently. The rated speed of the motor is 136 krpm and the rated output power is 1.85 kW. Considerable attention has been paid in the design due to the super high speed range of operation. In the paper, we will present our analysis and design approach based on computer modeling and simulation. View full abstract»

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  • Performance Analysis of Large Cylindrical Arrays Comprised of Subarray Panels

    Publication Year: 2008 , Page(s): 45 - 52
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (7935 KB) |  | HTML iconHTML  

    Using classical array theory this paper presents directivity, sidelobe, and bandwidth performance analysis over narrow and wide bandwidths in the microwave frequency region for several large cylindrical array configurations comprised of panel subarrays. The degree of main beam spreading, grating lobe levels, and directivity loss is presented for several designs involving trade-offs between true time delay beam scanning and phase shifter beam scanning. It is also shown that the grating lobes may be reduced with an amplitude taper across the array. View full abstract»

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  • Analysis of Coupled Oscillator Array Including Effects of Amplitude Dynamics

    Publication Year: 2008 , Page(s): 53 - 55
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2775 KB) |  | HTML iconHTML  

    This paper investigates the effects of amplitude dynamics on the operation of coupled oscillator arrays. The free running frequencies for achieving constant phase progression and arbitrary amplitude distribution are developed. A code structure that implements the system dynamics is suggested. Numerical results show that amplitude dynamics have significant effects on main beam errors and the side lobe levels if non-uniform amplitude distribution is employed. View full abstract»

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  • Genetic Algorithm: Application to Scattered Data Problems using Lipschitz Interpolation

    Publication Year: 2008 , Page(s): 56 - 58
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3427 KB) |  | HTML iconHTML  

    In this paper, a low computational method of efficiently and quickly handling large multivariate scattered data sets with a genetic algorithm for design parameter optimization is presented. The method presented combines the use of a genetic algorithm and the linear interpolation technique identified as Lipschitz Interpolation. Using this method we have improved the performance of the algorithm in two ways, the variance of the solution and the total algorithm evaluation time (an improvement of magnitude 90%). View full abstract»

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  • Determination of Electronic Warfare Receiver's Instantaneous Dynamic Range Using Music Method

    Publication Year: 2008 , Page(s): 59 - 67
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (8824 KB) |  | HTML iconHTML  

    The purpose of this paper is to find the limit of instantaneous dynamic range (IDR) for electronic warfare (EW) receivers with two-signal detection capability. In order to make the limit independent of the order of music method, very high order is used. Two signal detection criterions are used. One criterion is through the eigenvalue distribution. The other is through the frequency identification using the music spectral analysis. General behavior of IDR vs. frequency shows a small IDR at small frequency separation and that IDR reaches a saturation value at some frequency separation. This is the expected result. In order to apply to practical EW receiver design, analog-to-digital converters (ADCs) with various numbers of bits are used to calculate the IDR. The calculated results for ADC with different number of bits are curve fitted to represent the IDR vs. frequency separation. These curves can be used as the limit for digital EW receiver designs. View full abstract»

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  • A Comparison of Multispectral Transforms

    Publication Year: 2008 , Page(s): 68 - 73
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5619 KB) |  | HTML iconHTML  

    This research compares the results of five multispectral transforms applied to images of carbonized scrolls to determine which transform creates the best readable image. These transforms are vector quantization with principal components analysis, noise subspace projection, interference-and-noise-adjusted principal components analysis, convex cone analysis, and penalized discriminant analysis with principal components analysis. One approach to interference-and-noise-adjusted principal components analysis called signal-to-interference-plus-noise-ratio-based principal components analysis had the highest readability score according to a subjective judgment of 30 randomly selected individuals. However, convex cone analysis created a resultant image with the highest signal-to-noise ratio. View full abstract»

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  • Parametric Model of High-Resolution Radio-Frequency Dismount Data

    Publication Year: 2008 , Page(s): 74 - 77
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4302 KB) |  | HTML iconHTML  

    With recent advancements in radar technology, RF characterization of dismounts has become feasible. This paper presents the initial steps taken in developing a physically-relevant parametric RF dismount model. The model assumes the data is composed of multiple interacting attributed scattering centers that can be associated to human body elements. View full abstract»

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  • The Role of Propagation Effects in Airborne RF Communication Systems Design

    Publication Year: 2008 , Page(s): 78 - 84
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (7539 KB) |  | HTML iconHTML  

    Recent years have seen the emergence of Unmanned Aerial Systems performing roles that use various Radio Frequency (RF) systems. Thus, there is a need to use accurate and broadly capable signal propagation models to capture multi-path effects as well as atmospheric effects in system requirements analysis. One such model, the Variable Terrain Electromagnetic Parabolic Equation (VTRPE) model, enables the required analysis for a wide range of applications. The work presented in this paper uses VTRPE to analyze signal propagation in multi-path environments and places the results in a system design context drawing conclusions to aid in airborne RF systems design. View full abstract»

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  • A Non-Linear Flash Analog to Digital Architecture for Sinusoidal Input Signals

    Publication Year: 2008 , Page(s): 85 - 88
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3180 KB) |  | HTML iconHTML  

    We hypothesize that we can improve the footprint by using a static non-linear flash encoding scheme for Analog to Digital (A/D) converters for an important set of functions. This architecture can reduce the number of comparators and resisters in a flash converter by 25%.. View full abstract»

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  • Error Detection and Correction - A novel technique implementing Dual Rail Logic and Rollback recovery Architecture

    Publication Year: 2008 , Page(s): 89 - 91
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2813 KB) |  | HTML iconHTML  

    This paper investigates a computer architecture that provides fault detection in the execution elements, redundancy and error coding in memory storage elements, and incorporates software that allows rollback to a recovery boundary in the executing program when errors do occur. The architecture is intended for use in an environment where any errors encountered would be in the processors current computational instructions. The use of dual-rail logic is proposed for the purpose of providing single-bit error detection in computational units. This approach will be step towards creating a reliable computation environment in space based applications where the environment is quite hostile to computing systems. View full abstract»

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  • Research Issues Related to the Visualization of Complex and Networked Systems

    Publication Year: 2008 , Page(s): 92 - 93
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (222 KB) |  | HTML iconHTML  

    A number of research issues are discussed on how best to visualize performance and vulnerability in complex and distributed network systems. A powerful paradigm would be to convey information about a distributed network to a decision maker using natural attributes of display systems such as color, shape, and other variables. Future visualizations are hypothesized to enable decision makers to better understand complex visualizations so they can allocate scarce resources to protect their networks. View full abstract»

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