| Experimental Characterization and Modeling of Damage in Composites Under Ballistic Impact |
MAR 2003 |
121 pages |
| Authors:
Namas Chandra; FLORIDA AGRICULTURAL AND MECHANICAL UNIV TALLAHASSEE DIV OF SPONSORED RESEARCH
|
 | The primary focus of our research is to understand the ballistic behavior of composites. It is shown that the shock response of composites is quite different from that of the metals, and the presence of heterogeneous interfaces in composites can be attributed to this fact. The interfaces cause multiple scattering, and the magnitude of scattering depends on the level of heterogeneity as indicated by impedance mismatch. In this research work ... |
|
| Roles of Unmanned Vehicles |
MAR 2003 |
56 pages |
| Authors:
J. M. Bachkosky; G.A. Begley; R.L. Rumpf; J.J. Eash; P.A. Fratarangelo; J.E. Hubbard; D.J. Katz; J.B. Mooney; A.A. Morrish; J.M. Sinnett; J.A. Smith; M. Toscano; E. Zimet; NAVAL RESEARCH ADVISORY COMMITTEE ARLINGTON VA
|
| Over the past 20 years there has been a proliferation of unmanned vehicle (UV) research and development efforts and programs. Accordingly, the NRAC was asked to assess potential concepts of operations and employment across all naval missions with respect to unmanned vehicles. Specifically the panel was tasked to examine fleet needs, requirements, and desired capabilities and recommend which concepts are considered to have the greatest potential to improve warfighting capabilities ... |
|
| A Thermal Hydraulic Model of Melt Lubrication in Railgun Armatures |
MAR 2003 |
28 pages |
| Authors:
R. E. Kothmann; F. Stefani; TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY
|
| This paper describes the first step toward a model of the liquid film at the rail/armature interface in solid armature railguns. It considers high- speed Couette flow with purely viscous heating and does not include MHD body forces or Joule heating. The focus is on coupled fluid dynamics and multi-phase heat transfer. The formulation is similar to the analysis of melt lubrication in rotating projectile bands, but our first principles ... |
|
| Effects of Short Crested Seas on the Motions of a Trolley Interfact for Ship-to-Ship Cargo Transfer |
MAR 2003 |
116 pages |
| Authors:
Chong K. Shin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL ENGINEERING
|
| This thesis sets out to explore the effects on the dynamic response of a hybrid trolley system, employed in ship to shore cargo transfer operating in a realistic short crested irregular seaway. Compared to the multi-directional long crested waves, the multi-directional nature of short crested waves enhances the realism of the modeling. A standard cosine-squared spreading law was added to the two-parameter Bretschneider spectrum. The results provide added data on ... |
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| The Use of Tactile Navigation Displays for the Reduction of Disorientation in Maritime Environments |
FEB 2003 |
6 pages |
| Authors:
Trevor Dobbins; Shaun Samways; QINTIQ LTD HANTS (UNITED KINGDOM) CENTRE FOR HUMAN SCIENCES
|
| The maritime environment can be difficult to navigate in, due to poor visual cues, leading to disorientation and the potential for operational failure. The sense of touch is often overlooked as a mode of information display, but is ideally suited to providing intuitive navigation cues. Tactile cues provide a potential method to overcome these visual limitations and provide an alternative mode of displaying information from the more common visual and ... |
|
| Army Science Board Ad Hoc Studies (CD-ROM) |
FEB 2003 |
|
| Authors:
ARMY SCIENCE BOARD WASHINGTON DC
|
 | ELECTRONIC FILE CHARACTERISTICS: 49 files; Adobe Acrobat (.PDF) and HyperText Markup Language (.HTML). PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 99.9 MB. SYSTEMS DETAIL NOTE: IBM-clone PC-compatible. ABSTRACT: Two recently completed Army Science Board Ad Hoc studies are electronically published on this CD: Adapting Future Wireless Technologies and Human Robot Interface Issues. To make better use of the capabilities of CD publication, we also include previous ... |
|
| Fisheye Menus |
FEB 2003 |
11 pages |
| Authors:
Benjamin B. Bederson; MARYLAND UNIV COLLEGE PARK INST FOR ADVANCED COMPUTER STUDIES
|
| Introduced are "fisheye menus" which apply traditional fisheye graphical visualization techniques to linear menus. This provides for an efficient mechanism to select items from long menus, which are becoming more common as menus are used to select data items in, for example, e-commerce applications. Fisheye menus dynamically change the size of menu items to provide a focus area around the mouse pointer. This makes it possible to present the entire ... |
|
| Rendering Tcl/Tk Windows as HTML |
FEB 2003 |
|
| Authors:
William J. Hansen; CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST
|
| Tool Control Language (Tcl) is a programming language having a Toolkit (Tk) library that provides a standard set of graphical user interface (GUI) widgets. Since these are aimed at direct presentation via a window manager, Tcl/Tk applications are not compatible with Web-based service delivery environments. Several tools provide some help, but do not provide a migration path for eventual full conversion to Web-based delivery. This note suggests a new approach. ... |
|
| Structure and Modeling of Optical Wavefronts in High-Reynolds-Number Turbulent Aero-Optic Flows |
27 JAN 2003 |
44 pages |
| Authors:
Haris J. Catrakis; CALIFORNIA UNIV IRVINE AERONAUTICS ANDFLUID DYNAMICS LABORATORIES
|
| Two new methods have been developed and demonstrated which are particularly useful for modeling the large-scale and small-scale structure of aerooptical distortions, as well as the refractive fluid interfaces or density interfaces responsible for these distortions, at high compressibility and large Reynolds numbers. The first method, termed the interfacial-thickness approach, enables the examination of optical-wavefront propagation in terms of the physical thickness of the refractive interfaces. Demonstration of this method ... |
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| Robust Treatment of Interfaces for Fluid Flows and Computer Graphics |
01-Jan-2003 |
13 pages |
| Authors:
Doug Enright; Ron Fedkiw; CALIFORNIA UNIV LOS ANGELES DEPT OF MATHEMATICS
|
| Researchers have used numerical techniques to solve partial differential equations describing physical phenomena for many years. One challenging area, the numerical treatment of interfaces, motivated the creation of a topologically robust interface capturing algorithm, the level set method of Osher and Sethian [29]. The level set method has been used to track interfaces in a wide variety of applications. Utilizing geometrical information about the interface, which is naturally obtained from ... |
|
| User Manual for the Microsoft Window Edition of the Scanning Fast-Field Program (WSCAFFIP) Version 3.0 |
JAN 2003 |
45 pages |
| Authors:
John M. Noble; ARMY RESEARCH LAB ADELPHI MD
|
| The Scanning Past-Field Program (SCAFFIP) is an atmospheric acoustic propagation model that incorporates many of the effects of the environment on the sound field such as geometrical spreading, refraction, diffraction, molecular absorption, and complex ground impedance. SCAFFIP provides the user with the attenuation levels with range and frequency for a given geometry and meteorological profile. The meteorological profile and geometry provides the model with the ability to calculate the sound ... |
|
| Simulation Laboratory for Unmanned Aerial Vehicle Research |
JAN 2003 |
8 pages |
| Authors:
Joseph Nalepka; Matthew Duquette; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| Virtual simulations are simulations that are operated at real-world time intervals and usually require human-in-the-loop intervention to accomplish a set of simulation tasks. An example of this type of simulation would be a pair of piloted aircraft working together to acquire and deliver a weapon on to a specific target. For Unmanned Aerial Vehicles (UAVs), this type of simulation will be used to address issues related to mixed fleet operations, ... |
|
| A Comparative Study of User Performance in a Map-Based Virtual Environment |
Jan-2003 |
9 pages |
| Authors:
Swan; J E II; Joseph L Gabbard; Deborah Hix; Robert S Schulman; Keun P Kim; NAVAL RESEARCH LAB WASHINGTON DC ADVANCED INFORMATION TECHNOLOGY BRANCH
|
| We present a comparative study of user performance with tasks involving navigation, visual search, and geometric manipulation, in a map-based battlefield visualization virtual environment (VE). Specifically, our experiment compared user performance of the same task across four different VE platforms: desktop, cave, workbench, and wall. Independent variables were platform type, stereopsis (stereo, mono), movement control mode (rate, position), and frame of reference (egocentric, exocentric). Overall results showed that users performed ... |
|
| Interface Conduction between Conductive ReO3 Thin Films and NdBa2Cu3O6 Thin Film |
2003 |
7 pages |
| Authors:
Manabu Ohkubo; Kumiko Fukai; Kohji Matsuo; Nobuyuki Iwata; Hiroshi Yamamoto; NIHON UNIV CHIBA (JAPAN) DEPT OF ELECTRONICS AND COMPUTER SCIENCE
|
| The Re oxide films were deposited on quartz glasses by RF reactive sputtering from a Re metal target. The lowest resistivity was observed in the film in-situ annealed at 200 deg. C in Ar atmosphere and showed the order of 10(exp -4) Ohm cm of which the value was still about 10 times as large as that of a single crystal ReO3. The temperature dependence of the resistivity revealed a ... |
|
| Anomalous X-ray Scattering for Determination of Nanostructured Alloy Formation and Site-specific Chemistry of Bragg Peak |
2003 |
12 pages |
| Authors:
G. M. Chow; NATIONAL UNIV OF SINGAPORE DEPT OF MATERIAL SCIENCE
|
| The properties of nanostructured films can be tailored by many factors such as composition, structure, preferred orientation, microstructure, interphase interface and grain boundaries. Compositional control of magnetic properties of recording media depends on the miscibility of constituent elements. However, for nanostructured materials with a large surface-to-volume ratio of atoms, the miscibility at the nanoscale may not necessarily follow the prediction of conventional phase diagram that does not consider the effects ... |
|
| Interfacial Control of Creep Deformation in Ultrafine Lamellar TiA1 |
2003 |
7 pages |
| Authors:
L. M. Hsiung; LAWRENCE LIVERMORE NATIONAL LAB CA CHEMISTRY AND MATERIALS SCIENCE DEPT
|
| Solute effect on the creep resistance of two-phase lamellar TiAl with an ultrafine microstructure creep- deformed in a low-stress (LS) creep regime WHERE A NEARLY LINEAR CREEP BEHAVIOR WAS OBSERVED has been investigated. The resulted deformation substructure and in-situ TEM experiment reveals that interface sliding by the motion of preexisting interfacial dislocations is the predominant deformation mechanism in LS creep regime. Solute segregation at interfaces and interfacial precipitation caused by ... |
|
| Plastic Relaxation Mechanics in Systems with a Twist-Bonded Layer |
2003 |
6 pages |
| Authors:
Catherine Priester; Genevieve Grenet; INSTITUT SUPERIEUR ELECTRONIQUE DU NORD- IEMN (FRANCE)
|
| With a view to investigating how a thin film twist-bonded to a host substrate can have compliant behavior from a plasticity point of view the onset and spread of edge dislocations throughout a mesa are studied. The discussion focuses on the energy relaxed by such dislocations in a mesa made from two coherently bonded lattice-mismatched layers twist-bonded onto a host substrate and patterned down to the film/host substrate interface. Our ... |
|
| Fast and Accurate Boundary Variation Method for Multi-Layered Diffraction Optics |
2003 |
40 pages |
| Authors:
L. C. Wilcox; P. G. Dinesen; J. S. Hesthaven; BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS
|
| A boundary variation method for the forward modeling of multi-layered diffraction optics is presented. The approach enables for fast and high-order accurate modeling of infinite periodic and finite aperiodic transmission optics, consisting of an arbitrary number of materials and interfaces of general shape, subject to plane wave illumination or, by solving a sequence of problems, illumination by beams The key elements of the algorithm are discussed as are details of ... |
|
| Low Frequency Noise Characterization System of Advanced Electronics Devices |
16 DEC 2002 |
32 pages |
| Authors:
Eicke Weber; Petra Specht; CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB
|
| To date, a rising need for high-speed low-noise electronic devices is observed for a wide variety of applications, including wireless or fiber communications. Low frequency noise poses a lower limit on the signal level in broadband circuits. Noise sources are related to various kinds of materials imperfections such as point or line defects, but also to interface interface defects or defects at contacts. As device dimensions decrease, the noise introduced ... |
|
| An Augmented Reality System for Military Operations in Urban Terrain |
05-Dec-2002 |
9 pages |
| Authors:
Mark A Livingston; Lawrence J Rosenblum; Simon J Julier; Dennis Brown; Yohan Baillot; Swan; J E II; Joseph L Gabbard; Deborah Hix; NAVAL RESEARCH LAB WASHINGTON DC ADVANCED INFORMATION TECHNOLOGY BRANCH
|
| Many future military operations are expected to occur in urban environments. These complex, 3D battlefields introduce many challenges to the dismounted warfighter. Better situational awareness is required for effective operation in urban environments. However, delivering this information to the dismounted warfighter is extremely difficult. For example, maps draw a user's attention away from the environment and cannot directly represent the three-dimensional nature of the terrain. To overcome these difficulties, we ... |
|
| Barrel Wear Reduction in Rail Guns: An Investigation of Silver Paste Liquid-Metal Interface |
DEC 2002 |
62 pages |
| Authors:
Michael W. Smith Jr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis tests the effects a commercial silver paste has on the damage at the projectile-rail interface of a 4" long rail gun test section. Projectiles (0.635 x 0.635 x 0.953 cm) were pushed through the rail test section at 34 plus or minus 19 m/s, while average current densities of 18 - 32 kA/cm2 was passed through the projectile - rail interface material. The specific objective is to examine ... |
|
| Aiding Planning in Air Traffic Control: An Experimental Investigation of the Effects of Perceptual Information Integration |
DEC 2002 |
7 pages |
| Authors:
Peter M. Moertl; John M. Canning; Scott D. Gronlund; Michael R. Dougherty; Joakim Johansson; OKLAHOMA UNIV NORMAN DEPT OF PSYCHOLOGY
|
| Prior research examined how controllers plan in their traditional environment and identified various information uncertainty by perceptually representing important constraints. This included integrating spatial information on the radar screen with discrete information (planned sequences of air traffic). Canning et al. (1999) and Moertl et al. (2000) reported improved planning performance and decreased workload in the planning aid condition. The purpose of this paper was to determine the source of these ... |
|
| Hybrid Verification of an Interface for an Automatic Landing |
DEC 2002 |
8 pages |
| Authors:
Meeko Oishi; Ian Mitchell; Alexandre Bayen; Claire Tomlin; Asaf Degani; STANFORD UNIV CA DEPT OF AERONAUTICS AND ASTRONAUTICS
|
| Modern commercial aircraft have extensive automation which helps the pilot by performing computations, obtaining data, and completing procedural tasks. The pilot display must contain enough information so that the pilot can correctly predict the aircraft's behavior, while not overloading the pilot with unnecessary information. Human-automation interaction is currently evaluated through extensive simulation. In this paper, using both hybrid and discrete-event system techniques, we show how one could mathematically verify that ... |
|
| Computer-Controlled Photodetector Characterization System (Design and Construction) |
DEC 2002 |
85 pages |
| Authors:
Bryan E. Herdlick; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This system was designed to evaluate the response characteristics of photodetectors operating at wavelengths in the 1 micron and 8-12 micron range. A Quartz-Tungsten-Halogen source was used for visible and near-IR energy, and a dedicated IR element provided gray-body radiation with a peak at 1150 Kelvin. A monochromator was employed in conjunction with a six-position filter wheel to provide precise control of energy incident on the photodetectors. Variations in the ... |
|
| Motion Analysis of a Trolley Interface for Ship-to-Ship Cargo Transfer |
DEC 2002 |
80 pages |
| Authors:
Brian Higgins; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The goal of this thesis is to investigate the effectiveness of a trolley interface for ship-to-ship cargo transfer. The new interface alleviates some of the torsional problems associated with existing ramp designs and can be effectively utilized for both skin-to-skin and Roll-On Roll-Off operations. A mathematical model is developed in order to predict cargo transfer rates in a seaway. Three dimensional hydrodynamic analysis data are used to calculate expected transfer ... |
|
| 3D Visualization of an Invariant Display Strategy for Hyperspectral Imagery |
DEC 2002 |
|
| Authors:
Kang S. Kim; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Spectral imagery provides multi- dimensional data, which are difficult to display in standard three-color image formats. Tyo, et al. (2001) propose an invariant display strategy to address this problem. This approach is to mimic the dynamics of human perception. The dimensionality of the data are reduced by using a Principal Component (PC) transformation, and then displayed by making used of a Hue, Saturation, and Value (HSV) display transform. This study ... |
|
| Point of Maintenance Ruggedized Operational Device Evaluation and Observation Test Report |
NOV 2002 |
114 pages |
| Authors:
Megan Gorman; Carlton Donahoo; Laurie Quill; Johnnie Jernigan; DAYTON UNIV OH RESEARCH INST
|
| The Air Force Directorate of Maintenance (USAF/ILM) and the Standard Systems Group, Maintenance Systems Division (HQ SSG/ILM) sponsored an evaluation test for the purpose of identifying potential electronic tools for use at the flightline point of maintenance. The Air Force Research Laboratory, Logistics Readiness Branch (AFRL/HESR) and the University of Dayton Research Institute (UDRI) were commissioned by SSG/ILM to independently and objectively perform the evaluation. The evaluation was conducted at ... |
|
| Human/Machine Interface Modalities for Soldier Systems Technologies |
30 OCT 2002 |
69 pages |
| Authors:
Sandeep Mulgund; John Stokes; Melanie Turieo; Marlene Devine; TIAX LLC CAMBRIDGE MA
|
| The Army's Objective Force Warrior program seeks to create a lightweight overwhelmingly lethal fully integrated individual combat system. This includes weapon, head-to-toe individual protection, networked communications, soldier-worn power sources, and enhanced human performance. Achieving this objective will in part entail the development of soldier-centric human/machine interfaces (HMIs) that optimize cognitive fightability. Such optimization is possible only if these HMIs are designed in such a way that takes into account the ... |
|
| A Virtual Reality Applications Facility for Visualization of Joint Battlespace |
04 OCT 2002 |
8 pages |
| Authors:
James E. Bernard; Carolina Cruz-Neira; IOWA STATE UNIV AMES
|
| The purchase of the flexible screen configuration helped bring the C4 on line in May 2002. Since that time, work with the C4 and the other VRAC immersive environments have increased to provide support for a wide range of ongoing work, including exciting and innovative defense contracts. |
|
| Instrumentation for the Interfacial Analysis for Biosensor Microsystems Containing Genetically Engineered Proteins |
01 OCT 2002 |
3 pages |
| Authors:
Homme W. Hellinga; DUKE UNIV MEDICAL CENTER DURHAM NC DEPT OF BIOCHEMISTRY
|
| The combined use of an atomic force microscope and ellipsometer allows determination of the structure of immobilized protein layers (thickness, orientation, surface concentration, homogeneity), kinetics of layer formation, transport properties of ligand between bulk and protein layer, and stability of the protein layer as compared to solution stability. We have characterized monolayers formed by covalent attachment of E. coli periplasmic binding proteins to glass and other substrates, and found that ... |
|
| Advanced Nondestructive Evaluation (NDE) Methods. Work Unit Directive (WUD) 40 |
OCT 2002 |
9 pages |
| Authors:
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| This bibliography consists of a compilation of publications from 1994-1999. |
|
| A DIS Entity State PDU Generator |
OCT 2002 |
|
| Authors:
Lucien Zalcman; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION SALISBURY (AUSTRALIA) SYSTEMS SCIENCES LAB
|
| The recent I/ITSEC 2001 Coalition Training Demonstration held between the US, Australian and Dutch Navies demonstrated a coalition training exercise using Advanced Distributed Simulation to simultaneously connect military training simulators in the USA, Australia and the Netherlands. Whilst participating in the setup and running of this exercise each nation used whatever tools were available to establish and maintain connectivity and interoperability. As one of the lessons learned from such a ... |
|
| Agility: Agent - Ility Architecture |
OCT 2002 |
|
| Authors:
Craig Thompson; Tom Bannon; Steve Ford; Paul Pazandak; Venu Vasudevan; OBJECT SERVICES AND CONSULTING INC BALTIMORE MD
|
| Today's agent systems are monolithic, centralized, and do not provide a clear migration path for integration with mainstream technologies (e.g., object and web technologies). The objective of the Agility project is to develop an open agent grid architecture populated with scalable, deployable, industrial strength agent grid components, targeting the theme 'agents for the masses.' The overall technical approach has been to deconstruct agent systems into components, then populate an open ... |
|
| System Operation Test Facilitating Program and Method |
24 SEP 2002 |
29 pages |
| Authors:
Kim Belenger; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A method and system are provided by the present invention for developing functional software element that operates in an environment comprising a plurality of computer programs that are being simultaneously developed. A test facilitating computer program product is utilized to simulate the plurality of computer programs as seen by the functional software element. The functional software element has one or more internal software interfaces that interact with one or more ... |
|
| Spatial and Temporal Variability in Bottom Roughness: Implications to High Frequency Subcritical Penetration and Backscatter |
20 SEP 2002 |
9 pages |
| Authors:
Kevin L. Williams; Darrell R. Jackson; Eric I. Thorsos; Dajun Tang; Kevin B. Briggs; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| Quantitative prediction of high frequency, low grazing angle penetration into, and scattering from, sand sediments requires knowledge of the roughness of the water/sand interface. Since the sediment roughness evolves due to hydrodynamic and biological processes, concurrent, co-located measurement of roughness and acoustic penetration/backscattering is essential for testing acoustic models or using such models to determine the likelihood of buried target detection. Here, we examine both roughness and acoustic measurements carried ... |
|
| Measurements and Observations of Interfacial Creep in Engineering Systems |
SEP 2002 |
145 pages |
| Authors:
Keith A. Peterson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In many applications, large shear stresses develop at interfaces between dissimilar materials during thermo-mechanical excursions, when there is a significant difference in the coefficient of thermal expansion between them, When the system is elevated to a high homologous temperature for one of the adjoining materials, the applied shear stress may allow the interface to slide without debonding by a diffusionally accommodated mechanism, thereby allowing relative dimensional changes to occur, The ... |
|
| Coupling Retinal Scanning Displays to the Human Visual System: Visual System Response and Engineering Considerations |
14 AUG 2002 |
290 pages |
| Authors:
Stuart L. Turner; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
|
| A retinal scanning display (RSD) is a visual display that presents an image to an observer via a modulated beam of light that is directed through the eye's pupil and rapidly scanned in a raster-like pattern across the retina. As compared to conventional displays that create a real image for viewing, the RSD induces a virtual image only in the mind of the observer. The spatio-temporal characteristics of the RSD ... |
|
| SEDRIS Transmittal Generation for a Dismounted Infantry Simulator |
AUG 2002 |
35 pages |
| Authors:
Andrew M. Neiderer; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD COMPUTATIONAL AND INFORMATION SCIENCES
|
| Interoperability of heterogeneous computer-based simulators is integral to today's military training Systems. This report presents a standardized solution for the distribution of environmental data resulting from a munition perforating an urban structure as computed by the U.S. Army Research Laboratory Dismounted Infantry Simulator (DISim). Synthetic Environment Data Representation and Interchange Specification (SEDRIS) transmittals are generated for such an interaction. Each SEDRIS transmittal contains resulting geometric and attribute data. The application ... |
|
| Effort Flow Analysis: A Methodology for Directed Product Evolution Using Rigid Body and Compliant Mechanisms |
AUG 2002 |
374 pages |
| Authors:
James L. Greer; TEXAS UNIV AT AUSTIN
|
| This dissertation presents a systematic design methodology for directed product evolution that uses both rigid body and compliant mechanisms to facilitate component combination in the domain of mechanical products. The methodology, known as effort flow analysis, is based on fundamental tenets from the Theory of Mechanics, and Graph Theory. Effort flow analysis uses a semantic network known as an effort flow diagram to model a product as a connected set ... |
|
| Sensor Deployment |
AUG 2002 |
4 pages |
| Authors:
Martin Taylor; MARTIN TAYLOR CONSULTING TORONTO (ONTARIO)
|
| Why do users who do not want to be flooded by data want ever bigger screens on which to display more data? It seems somewhat inconsistent for a commander to complain about the dataflood, while at the same time asking for screens that fill whole room walls. or for 3-D worktables that can present ever more data. Yet this is exactly what many commanders do. This presentation discusses the underlying ... |
|
| Multimedia Visualization of Massive Military Datasets (Atelier OTAN sur la visualisation multimedia d'ensembles massifs de donnees militaires) |
AUG 2002 |
|
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| The workshop IST-020/RWS-002 on Multimedia Visualisation of Massive Military Datasets was held at the Defence Research Establishment Valcartier, Quebec, Canada from 6-9 June 2000. Five major themes were addressed in 28 presentations with extended discussion, in separate sessions entitled: Operations Visualisation; Visualisation for Command; Network Visualisation; Data Fusion; Maths and Techniques. |
|
| A Simple 3D Visual Text Retrieval Interface |
AUG 2002 |
6 pages |
| Authors:
Ben Houston; Zack Jacobson; CONSULTING AND AUDIT CANADA OTTAWA (ONTARIO)
|
| 3D visual text retrieval interfaces are currently a fringe topic of interest. This paper suggests that 3D visual interfaces are fringe topics because of the complexity and abstract nature of many of the previous attempts in this area. In order for 3D visual interfaces to become mainstream this paper proposes that they must be concrete in the metaphor they employ, simple to use, and appear familiar to the average web ... |
|
| A Multi-Domain Spectral Method for Supersonic Reactive Flows |
AUG 2002 |
29 pages |
| Authors:
Wai-Sun Don; David Gottlieb; Jae-Hun Jung; INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
|
| This paper has a dual purpose: it presents a multidomain Ohebyshev method for the solution of the two-dimensional reactive compressible Navier- Stokes equations and it reports the results of the application of this code to the numerical simulations of high Mach number reactive flows in recessed cavity. The computational method utilizes newly derived interface boundary conditions as well as an adaptive filtering technique to stabilize the computations. The results of ... |
|
| Replaceable Components and the Service Provider Interface |
JUL 2002 |
|
| Authors:
Robert Seacord; Lutz Wrage; CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST
|
| Several popular component-based standards have emerged recently, including JavaBeans(registered) and Enterprise JavaBeans(registered) from Sun Microsystems and the Component Object Model from Microsoft. These component models are being adopted for use in software development, as they eliminate opportunities for architectural mismatch and are supported by standard services. A highly touted property of component models is that they support the development of replaceable components. Unfortunately, a robust, commercial marketplace of replaceable components ... |
|
| Self-Assembled Monolayers at the Lithium Electrode/Polymer Electrolyte Interface |
21 JUN 2002 |
75 pages |
| Authors:
Dale Teeters; TULSA UNIV OK
|
| The proposed work involved the placement of self-assembled monolayers (SAMs) on the polymer electrolyte surface to deter and/or stabilize the formation of the passivation layer between the polymer electrolyte and the lithium electrode. This work combines two very scientifically and technologically important areas, lithium polymer batteries and self-assembled monolayers, resulting in a novel study that has advanced the basic understanding of the electrode/electrolyte interface and the development of better battery ... |
|
| An Investigating of Interfacial Fracture Using Experiments, Modeling, and Simulation |
11 JUN 2002 |
24 pages |
| Authors:
T. C. Miller; E. Guan; J. Todaro; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
|
| The high cost and complexity of modern rocket systems provide multiple possibilities for failure, any one of which could result in lost lives and large capital losses. One failure mode involves deterioration of the layered materials near the inside of the rocket motor case. Rocket motor incorporates four layers of materials. Each layer contributes to motor performance in some significant way, but adds complexity and increases the number of potential ... |
|
| SHOALS Toolbox: Software to Support Visualization and Analysis of Large, High-Density Data Sets |
01-Jun-2002 |
9 pages |
| Authors:
Jennifer M Wozencraft; W J Lillycrop; Nicholas C Kraus; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| The Coastal and Hydraulics Engineering Technical Note (CHETN) described herein outlines the capabilities of SHOALS Toolbox, a stand-alone software package designed to facilitate the use of SHOALS (Scanning Hydrographic Operational Airborne Lidar Survey) and other high-density survey data in engineering analyses. The SHOALS Toolbox comprises a suite of tools with which to visualize, manipulate, and analyze SHOALS data, in keeping with current U.S. Army Corps of Engineers (USACE) computer and ... |
|
| Non-Destructive Evaluation of Materials Using Pulsed Microwave Interrogating Signals and Acoustic Wave Induced Reflections |
JUN 2002 |
38 pages |
| Authors:
R. A. Albanese; H. T. Banks; J. K. Raye; NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION
|
| A class of inverse problems is formulated for the estimation of material dielectric parameters using reflections of pulsed microwave interrogating signals from moving acoustic interfaces in the dielectric. A model for acoustic pressure-dependence of material constitutive parameters in Maxwell's equations is presented and analyzed. Theoretical and computational findings for approximation and estimation are given. |
|
| Helmet-Mounted Display (HMD) Interface Design for Head-Up Display (HUD) Replacement Exploratory Development - NTL, Inc. |
JUN 2002 |
83 pages |
| Authors:
Robert L. Shaw; NTI INC DAYTON OH
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| Increasingly, helmet-mounted displays (HMDs) are replacing "head- down" and Read-Up Displays (HUD) in advanced cockpit interface designs. HMDs offer potential advantages by providing pilots with more direct access to critical visual information, while offering greater flexibility of head movements, less weight, and less consumption of cockpit space. Much of the symbology, functionality, and mechanization found in current HMDs can be traced directly to HUDs. But, because HMDs are decoupled from ... |
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| XML as a Data Exchange Medium for DoD Legacy Databases |
JUN 2002 |
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| Authors:
Kris Pradeep; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis addresses the issue of interoperability in DoD legacy system databases and evaluates XML as a tool for transferring message data between varied systems. With the demands for increased communication, the dire requirement for a common mode of information transfer is greatly realized. Many legacy systems have developed their own unique interfaces. XML is one solution which can help ease the transition to a common interface. This thesis is ... |
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