| 3-D Metal-Organic Framework Based on Cationic 2-D Cuprate Layers: Cu3(OH)4[C10H6(SO3)2] |
10-Nov-2009 |
7 pages |
| Authors:
Deryn Chu; Dat T Tran; Natasha A Chernova; Allen G Oliver; Scott R Oliver; ARMY RESEARCH LAB ADELPHI MD
|
 | We describe herein a three-dimensional Cu(II) based metal-organic framework, copper hydroxide 2,6-naphthalenedisulfonate, Cu3(OH)4[C10H6(SO3)2]. The compound contains embedded positively charged 2-D copper oxide layers. This higher dimensionality of inorganic connectivity leads to far greater thermal stability (375-deg C vs 245-deg C) over our previously reported three-dimensional metal-organic framework containing embedded 1-D cuprate chains. The structure, crystallinity, morphology, and properties of the material are discussed. The magnetic susceptibility exhibits a broad maximum ... |
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| 3D Modeling of Iran and Surrounding Areas from Simultaneous Inversion of Multiple Geophysical Datasets |
30-Sep-2009 |
10 pages |
| Authors:
Charles J Ammon; Monica Maceira; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
|
| The objective of this work is to help improve seismic monitoring technology through the development and application of advanced multivariate inversion techniques to generate realistic, comprehensive, and high-resolution 3D models of the seismic structure of the crust and upper mantle that satisfy independent geophysical datasets. Our focus is on the region surrounding Iran from the east coast of the Mediterranean in the west, to Pakistan in the east, an area ... |
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| Three Dimensional (3D) Topology Builder |
24-Sep-2009 |
|
| Authors:
Paul Watson; Mike L Mathews; Chris Evans; LASER SCAN INC STERLING VA
|
 | In this project, the LSI and ISpatial team addressed this obstacle by researching and developing a system capable of: 1) Creating a 3D topology model automatically from a number of different data models of varying formats and quality. 2) Maintaining this topology as feature data was modified on-the-fly. 3) Providing a web-service based automated data quality tool that is based on topological data and is capable of detecting errors that ... |
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| A Three-Dimensional Foil Bearing Performance Map Applied to Oil-Free Turbomachinery |
Apr-2009 |
22 pages |
| Authors:
Christopher Dellacorte; Kevin C Radil; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH GLENN RESEARCH CENTER
|
| To effectively apply compliant foil gas bearings to increasingly larger and more challenging turbomachinery, a comprehensive method that compares a foil bearing's capabilities with the application's operating requirements is needed. Extensive laboratory and field experience suggests foil bearing failure is generally due to thermal stress brought on by excessive viscous power loss; therefore a map that graphically relates component and system-level parameters (bearing size, applied loads, and shaft rotational speeds) ... |
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| Three-Dimensional (3D) Distribution |
11-Mar-2009 |
36 pages |
| Authors:
Michael P Peterman; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Joint sustainment in the 21st century must support full-spectrum operations by executing operational distribution capabilities with the Sustainment Trinity. The Sustainment Trinity is the framework that provides operational logistics commanders an ability to visualize the environment and affect the system of systems. The Sustainment Trinity provides operational distribution with a three-dimensional (3D) expeditionary approach (capacity); sees the strategic/operational/tactical distribution capabilities and links those capabilities to the tactical customer's needs (visibility); ... |
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| Geometric, Statistical, and Topological Modeling of Intrinsic Data Manifolds: Application to 3D Shapes |
Jan-2009 |
137 pages |
| Authors:
Djamila Aouada; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The increasing size and complexity of data often invokes the extraction of information from their reduced representations while preserving their inherent structure. In this thesis, we explore the statistical, geometric and topological intrinsic information contained in high dimensional data. We focus on applications related to 3-dimensional objects, and model their 2-dimensional surfaces using compact curved-skeletal models that we refer to as 'squigraphs'. These models are multi-level representations that superpose global ... |
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| Toward Three Dimensional Circuits Formed by Molten-Alloy Driven Self-Assembly |
Dec-2008 |
6 pages |
| Authors:
Madan Dubey; Christopher J Morris; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Self-assembly opens new possibilities in three-dimensional (3-D) device structures, and here we report on our progress toward a self-assembling 3-D circuit. A major challenge to such a system has been the fabrication of large numbers of free-standing, microfabricated parts, and we have overcome this challenge by developing a new wafer-bond and release process. We present this process on 100 mm diameter wafers, and finally show initial assembly results. |
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| Construction of 3-D Audio Systems: Background, Research, and General Requirements |
Oct-2008 |
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| Authors:
Simon P Parker; Geoffery Eberle; Russell L Martin; Ken I McAnally; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) AIR OPERATIONS DIV
|
| Over the last few years one of the most promising advances for Human Machine Interfaces (HMI) has been the development of 3-Dimensional Audio (3-D Audio). The Air Operations Division of DSTO has been engaged in an extensive research program developing 3-D audio for the military aviation environment. This document is intended to provide some general background and to list some of the broader requirements that need to be considered when ... |
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| A New Regional 3-D Velocity Model for Asia from the Joint Inversion of P-Wave Travel Times and Surface-Wave Dispersion Data |
30-Sep-2008 |
10 pages |
| Authors:
Delaine T Reiter; William L Rodi; WESTON GEOPHYSICAL LEXINGTON MA
|
| Accurate travel-time predictions for regional seismic phases are essential for locating small seismic events with the accuracy needed for nuclear monitoring decisions. Travel times calculated through a three-dimensional (3-D) Earth model have the best chance of achieving acceptable prediction errors, if the model is constrained by sufficient data. With this motivation, we have developed a self-consistent 3-D P and S velocity model of the crust and upper mantle in a ... |
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| Visualization of a Text Network Structure Using X3D |
MAY 2008 |
44 pages |
| Authors:
Andrew M. Neiderer; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD COMPUTATIONAL AND INFORMATION SCIENCES DIR
|
| This report describes a dynamic extensible three-dimensional (3-D) (X3D) scene graph for visualizing text documents. It was developed at the U.S. Army Research Laboratory as a tool for social network analysis: specifically, to view a network of nodes where a node is a noun within a news article. Keyword and target nodes are represented as X3D spheres of different radii and color. Keyword node attraction to a specific target node ... |
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| Semi-Analytical Approach to Three-Dimensional Shape Optimization Problems |
APR 2008 |
|
| Authors:
Michael Zabarankin; STEVENS INST OF TECH HOBOKEN NJ
|
| A semi-analytical approach to three-dimensional (3-D) shape optimization problems for a viscous incompressible fluid under the assumption of zero (low) Reynolds number has been developed. It couples the theory of generalized analytic functions with the adjoint equations-based method. A solution to Stokes equations governing the behavior of the fluid has been reduced to integral equations based on the Cauchy integral formula for k-harmonically analytic functions. The fluid velocity and boundary ... |
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| Design, Implementation, and Characterization of a Dedicated Breast Computed MammoTomography System for Enhanced Lesion Imaging |
01-Mar-2008 |
29 pages |
| Authors:
Randolph L McKinley; DUKE UNIV DURHAM NC
|
| The overall goal of this work was to design, implement, and characterize a novel dedicated mammotomography system for enhanced lesion detection. This novel system allows fully 3-D imaging of a pendant, uncompressed breast using novel 3-D complex orbit capabilities. A prototype system has been designed, developed, and extensively characterized with a number of figures of merit including SNR, dose efficiency, and contrast sensitivity. Results indicate the potential for sub dual-view ... |
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| Biomineralized 3-D Nanoparticle Assemblies with Micro-to-Nanoscale Features and Tailored Chemistries |
07-Jan-2008 |
30 pages |
| Authors:
Ken H Sandhage; Jennifer A Lewis; GEORGIA INST OF TECH ATLANTA SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
|
| This collaborative research project has focused on the integrated use of robust biomimetic or biological silica assembly processes with shape-preserving chemical conversion reactions to produce freestanding 3-D structures with selectable microscale morphologies, nanoscale features, and tailored, non-silica chemistries. Biomimetic 3-D silica structures have been synthesized through Direct-Write Assembly using polyamine-based inks, followed by templated conformal silicification. With proper selection of ink composition and silicification conditions, robust silica structures were formed ... |
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| Prey Fields and Habitat of Deep Divers: 3D Characterization and Modeling of Beaked and Sperm Whale Foraging Areas |
Jan-2008 |
11 pages |
| Authors:
Douglas P St Nowacek; Louis Laurent; David J Moretti; Patrick N Halpin; DUKE UNIV BEAUFORT NC MARINE LAB
|
| The physical and biological characteristics of the areas inhabited by deep diving odontocetes are poorly understood. Our long term goals are: i) to measure and characterize the biomass in areas and at depths inhabited by beaked and sperm whales; ii) to measure and characterize the physics of these environments; iii) to assemble the characteristics measured (i) and (ii) into a depth integrated, 3- dimensional habitat model; the model will include ... |
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| Computer Assisted Cancer Device -- 3D Imaging |
31-Oct-2007 |
8 pages |
| Authors:
Michael Liebman; Kevin Woods; Albert V Porambo; JACKSON (HENRY M) FOUNDATION ROCKVILLE MD
|
| It is well documented that breast cancer is frequently missed on mammograms, leading to delayed detection and potentially less successful treatment. Our studies show that approximately 32% of cancers can be detected early using mammograms. While current Computer-Assisted Detection (CAD) technology is designed to capture as many of these cancers as possible, it is not able to offer information specific enough to assist the radiologist in determining the best course ... |
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| X-Ray 3D Metrology System for SOFC Development |
OCT 2007 |
17 pages |
| Authors:
Steve Wang; XRADIA INC CONCORD CA
|
| Report developed under a SBIR contract. This SBIR project sought to develop an x-ray system for nondestructively imaging the internal three-dimensional structure of solid oxide fuel cells (SOFC) - a CT scanner for fuel cells with sub-50 nm resolution. During the Phase I project, Xradia completed two key tasks that demonstrate the use of this technology in routine SOFC development, specifically for studying Sulfur contamination. |
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| Spatial Databases |
19 SEP 2007 |
|
| Authors:
Vijay Gandhi; James Kang; Shashi Shekhar; MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Spatial database research has continued to advance greatly since three decades ago, addressing the growing data management and analysis needs of spatial applications. This research has produced a taxonomy of models for space, conceptual models, spatial query languages and query processing, spatial file organization and indexes, and spatial data mining. However, emerging needs for spatial database systems include the handling of 3D spatial data, temporal dimension with spatial data, and ... |
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| What Can Casual Walkers Tell Us About a 3D Scene? (PREPRINT) |
AUG 2007 |
10 pages |
| Authors:
Diego Rother; Kedar A. Patwardhan; Guillermo Sapiro; MINNESOTA UNIV MINNEAPOLIS INST FOR MATHEMATICS AND ITS APPLICATIONS
|
| An approach for incremental learning of a 3D scene from a single static video camera is presented in this paper. In particular, we exploit the presence of casual people walking in the scene to infer relative depth, learn shadows, and segment the critical ground structure. Considering that this type of video data is so ubiquitous, this work provides an important step towards 3D scene analysis from single cameras in readily ... |
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| Wind Profiles in Gentle Terrains and Vegetative Canopies for a Three-Dimensional Wind Field (3DWF) Model |
JUL 2007 |
40 pages |
| Authors:
Yansen Wang; Ronald Cionco; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD COMPUTATIONAL AND INFORMATION SCIENCES DIR
|
| The objective of this study is to establish a simple wind profile parameterization for the U.S. Army Research Laboratory's (ARL) diagnostic Three-Dimensional Wind Field (3DWF) Model in gentle terrain and vegetation canopies. The Project Wind in Non-uniform Domains (WIND) data was applied for the analysis of wind profiles in open terrain, forest edge, and the interior of forest. A wind profile parameterization scheme was proposed according to this analysis and ... |
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| Multi-scale 3D Scene Flow from Binocular Stereo Sequences (Preprint) |
JUN 2007 |
30 pages |
| Authors:
Rui Li; Stan Sclaroff; BOSTON UNIV MA DEPT OF COMPUTER SCIENCE
|
| Scene flow methods estimate the three-dimensional motion field for points in the world using multi-camera video data. Such methods combine multi-view reconstruction with motion estimation. This paper describes an alternative formulation for dense scene flow estimation that provides reliable results using only two cameras by fusing stereo and optical flow estimation into a single coherent framework. Internally, the proposed algorithm generates probability distributions for optical flow and disparity. Taking into ... |
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| Three-Dimensional Propagation and Scattering Around a Conical Seamount |
JUN 2007 |
|
| Authors:
Wenyu Luo; MASSACHUSETTS INST OF TECH CAMBRIDGE JOINT PROGRAM IN APPLIED OCEAN SCIENCE AND ENGINEERING
|
| In this thesis, a numerically efficient three-dimensional propagation and scattering model is developed based on the three-dimensional coupled mode theory for axisymmetric bathymetry. The three-dimensional coupled mode approach applied in this thesis is fundamentally identical to the one applied in earlier models, such as the one presented by Taroudakis. Thus, it is based on a Fourier expansion of the acoustic field around a seamount, with each azimuthal expansion coefficient being ... |
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| Three-Dimensional Nanobiocomputing Architectures With Neuronal Hypercells |
JUN 2007 |
51 pages |
| Authors:
Sergey Lyshevski; Vlad Shmerko; Svetlana Yanushkevich; Marina Lyshevski; MICROSYSTEMS AND NANOTECHNOLOGIES WEBSTER NY
|
| Microsystems and Nanotechnologies investigated a novel 3D3 (Hardware Software Nanotechnology) technology to design super-high performance computing and processing platforms utilizing molecular hardware within an enabling organization and architecture. The design technology is based on utilizing a three-fold solution: (1) Innovative hardware - 3D-topology molecular hardware (device module- system) within enabling organization/architecture solutions utilizing molecular integrated circuits (MICs); (2) Novel software - computer-aided-design (CAD) tools supported by new synthesis and design ... |
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| Infrastructure for 3D Imaging Test Bed |
11-May-2007 |
11 pages |
| Authors:
Hamid Krim; NORTH CAROLINA STATE UNIV AT RALEIGH
|
| In this report, we describe an experimental test bed we constructed with a variety of sensor modalities for data generation and model validation. Computer generated 3D target models are now routinely used in graphics and computer aided design, and increasingly in computer vision and image processing. This test bed serves primarily three purposes, (1) Data generation or targets for modeling and analysis (2) Emulation of realistic scenarios, (3) Algorithm verification ... |
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| Meso-Scale Self-Assembly Pilot Study |
17 APR 2007 |
9 pages |
| Authors:
Babak A. Parviz; WASHINGTON UNIV SEATTLE DEPT OF ELECTRICAL ENGINEERING
|
| The project investigates the formation of micro-scale structures using capillary force-driven self-assembly. Two main activities were undertaken during the course of the project: determination of the proper self-assembly environment and scaling of the metal contacts, and development of microfabrication processes that can generate micron-scale single crystal silicon parts that can participate in a self-assembly process. The effect of the alloy composition, chemical composition of the self-assembly environment, and contact metallization ... |
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| Euclidean Position Estimation of Static Features using a Moving Camera with Known Velocities |
09 MAR 2007 |
11 pages |
| Authors:
David Braganza; Darren Dawson; Tim Hughes; CLEMSON UNIV SC DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The estimation of 3D Euclidean coordinates of features from 2D images is a problem of significant interest. In this paper we develop a 3D Euclidean position estimation strategy for a static object using a single moving camera whose motion is known. The Euclidean depth estimator which is developed has a very simple mathematical structure and is easy to implement. Numerical simulations and preliminary experimental results using a mobile robot in ... |
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| Development of a Three Dimensional Perfectly Matched Layer for Transient Elasto-Dynamic Analyses |
DEC 2006 |
152 pages |
| Authors:
Anthony N. Johnson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A time-dependent, three-dimensional finite element approach to the development of a perfectly matched layer for numerical calculations of surface wave radiation in a half space is presented. The development of this new element required the coupling of a system of linear, second-order, partial differential equations which describe elastic wave propagation into a single weak-form (Galerkin) wave equation, from which the characteristics of a composite finite element matching layer were derived. ... |
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| Three Dimensional Immobilization of Beta-Galactosidase on a Silicon Surface (Preprint) |
DEC 2006 |
28 pages |
| Authors:
Heather R. Luckarift; Lorena Betancor; Jim C. Spain; GEORGIA INST OF TECH ATLANTA SCHOOL OF CIVIL ENGINEERING
|
| Many alternative strategies to immobilize and stabilize enzymes have been investigated in recent years for applications in biosensors. The entrapment of enzymes within silica-based nanospheres formed through silicification reactions provides high loading capacities for enzyme immobilization, resulting in high volumetric activity and enhanced mechanical stability. Here we report a strategy for chemically-associating silica nanospheres containing entrapped enzyme to a silicon support. Beta-Galactosidase was used as a model enzyme due to ... |
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| Initial Results from a Cartesian Three-Dimensional Parabolic Equation Acoustical Propagation Code |
DEC 2006 |
|
| Authors:
Timothy F. Duda; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| A three-dimensional (3D) parabolic equation acoustical propagation code has been developed and run successfully. The code is written in the MATLAB language and runs in the MATLAB environment. The code has been implemented in two versions, applied to: (1) Horizontal low-frequency (100 to 500 Hz) propagation through the shallow water waveguide environment; (2) Vertical high-frequency propagation (6 to 15 kHz) to study normal-incidence reflection from the lower side of the ... |
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| Non Destructive 3D X-Ray Imaging of Nano Structures & Composites at Sub-30 NM Resolution, With a Novel Lab Based X-Ray Microscope |
NOV 2006 |
|
| Authors:
S. H. Lau; Andrei Tkachuk; Hongtao Cui; Frederick Duewer; Michael Feser; Yuxing Wang; Wenbing Yun; XRADIA INC CONCORD CA
|
| In this article we describe a 3D x-ray microscope based on a laboratory x-ray source operating at 2.7, 5.4 or 8.0 keV hard x-ray energies. X-ray computed tomography (XCT) is used to obtain detailed 3D structural information inside optically opaque materials with sub-30 nm resolution. Applications include imaging internal 3D arrays of nanostructures of smart materials, polymer nanocomposites, porosity and structural imaging within fuel cells; understanding the internal workings of ... |
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| Control Interface for Driving Interactive Characters in Immersive Virtual Environments |
NOV 2006 |
9 pages |
| Authors:
Stephen H. Lane; Henry Marshall; Timothy Roberts; SOVOZ INC PRINCETON JUNCTION NJ
|
| The effectiveness of training Soldiers in immersive 3D virtual environments is currently limited by character control interfaces that require users to learn actions, for example moving a joystick or pressing a button, that do not necessarily enhance the user's physical performance in equivalent real world tasks and situations. In order to address this need, an advanced man/machine user interface has been developed utilizing inertial position, orientation, ultrasonic range and foot ... |
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| Three-Dimensional Digital Microstructure |
NOV 2006 |
5 pages |
| Authors:
C. F. Cornwell; R. W. Noack; E. J. Abed; HIGH PERFORMANCE TECHNOLOGIES INC ABERDEEN MD
|
| We report on a systematic means of generating a finite element (FE) mesh for realistic three-dimensional (3D) microstructure systems that are suitable for FE analysis. The relationship between a materials microstructure and its properties are well documented and drive efforts to model the substructure evolution of textured materials. An accurate 3D computer representation of the microstructure arrangement of a material is essential to modeling the behavior and performance of materials ... |
|
| Computer Assisted Cancer Device - 3D Imaging |
OCT 2006 |
9 pages |
| Authors:
Albert V. Porambo; Lee Bronfman; Steve Worrell; Kevin Woods; Michael Liebman; HENRY M JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE ROCKVILLE MD
|
| The technical objective of the Computer Assisted Cancer Device project is to develop a platform technology that will allow for a significant improvement in the accuracy of interpreting mammograms through the use of Second Generation Computer Assisted Detection (2nd Generation CAD) that is designed for using not only the current year's screening mammograms (as is common in first generation commercial CAD) but also any additional clinically relevant information (e.g. prior ... |
|
| Fabrications of Photonic Bandgap Structures in Si and Ge Substrates Using Laser-Assisted Nanoimprinting of Self-Assembled Nanoparticles |
SEP 2006 |
32 pages |
| Authors:
Yongfeng Lu; NEBRASKA UNIV LINCOLN DEPT OF ELECTRICAL ENGINEERING
|
| The fabrications of periodic dielectric structures at nanoscales, which are called photonic bandgap (PBG) structures, have attracted the interests of researchers due to the applications in a variety of fields such as optoelectronics, photonics, sensors, photo catalysts, and energy harvesting coatings. One- and two-dimensional PBG structures have been realized because such systems are very amenable to conventional fabrication techniques. However, three-dimensional (3-D) PBG structures are still remained as an important ... |
|
| Incorporating Digisonde Traces into the Ionospheric Data Assimilation Three Dimensional (IDA3D) Algorithm |
11 MAY 2006 |
8 pages |
| Authors:
Trevor W. Garner; TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS
|
| This study incorporated virtual height traces measured by ionosondes directly into an objective analysis (OA) algorithm. The OA algorithms ingest available data sets to construct coherent maps that represent the larger scale behavior of the ionosphere. A forward model which calculates the virtual height profile form a given electron density distribution was developed and incorporated into the Ionospheric Data Assimilation Three Dimensional (IDA3D) OA algorithm. In addition, IDA3D was modified ... |
|
| Three-Dimensional Nanobiocomputing Architectures with aleph-Hypercells: Revolutionary Super-High-Performance Computing Platform |
MAY 2006 |
34 pages |
| Authors:
Sergey Lyshevski; Vlad Shmerko; Svetlana Yanushkevich; Marina Lyshevski; MICROSYSTEMS AND NANOTECHNOLOGIES WEBSTER NY
|
| Microsystems and Nanotechnologies developed a revolutionary 3D3 (Hardware-Software-Nanotechnology) technology to design three-dimensional (3D) nanobiocomputing architectures and Integrated Circuits (ICs). Our technology was based on the design of 3D computing architectures utilizing a threefold solution: (1) innovative hardware (device/module/system-level and 3D ICs); (2) novel software - Computer Aided Design (CAD) supported by new synthesis and design methods; and (3) enabling nanotechnology. The solution and innovations developed ensure information processing pre-eminence and ... |
|
| Characterization and Model Assessment for Impact Damage Evolution in Functionally Graded Composites Using a Novel Nanosecond Deformation Measurement System |
30 APR 2006 |
48 pages |
| Authors:
Stephen R. McNeill; Michael A. Sutton; Hugh A. Bruck; SOUTH CAROLINA UNIV COLUMBIA OFFICE OF SPONSORED PROGRAMS
|
| The principal goal of this research is to experimentally measure the three-dimensional transient deformation processes that occur in armor systems undergoing a range of dynamic loading conditions. The development of a 3-D image correlation system using digital cameras capable of acquiring images every 5 nano-seconds were used. Due to the nature of the cameras. extensive algorithms for the removable of image distortions were required. The image correlation technology was transferred ... |
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| Seafloor Scattering in Three Dimensions by Time Domain Finite Differences |
13 FEB 2006 |
|
| Authors:
Ralph A. Stephen; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| We were unsuccessful at making progress with the 3-D SEM research. As a complementary effort, we have packaged our 2-D TDFD code for distribution through the Ocean Acoustics Library (http://oalib.saic.com/). At a recent workshop on "Seismoacoustic applications in marine geology & geophysics" it was recognized that long range acoustic propagation in the ocean is not completely trapped in the SOFAR channel even in very deep water. The evidence comes from ... |
|
| Institutionalizing the Tri-Focal View: Continuing a Performance Evaluation Concept |
07-Feb-2006 |
17 pages |
| Authors:
J M Lizarraga; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| The Marine Corps prides itself on its ability to identify potential leaders during Officer Candidate School (OCS) using a unique in-depth analysis often referred to as the tri-focal view, or 360-degree review. The tri-focal view encompasses how the staff views the candidate's performance, how his peers view his performance, and how he (the candidate) views his own performance. This methodology has proved to be an effective litmus test for leadership ... |
|
| An Adjoint State Method for Three-Dimensional Transmission Traveltime Tomography Using First-Arrivals |
30 JAN 2006 |
23 pages |
| Authors:
Shingyu Leung; Jianliang Qian; CALIFORNIA UNIV LOS ANGELES DEPT OF MATHEMATICS
|
| Traditional transmission travel-time tomography hinges on ray tracing techniques. We propose a PDE-based Eulerian approach to travel-time tomography so that we can avoid the cumbersome ray-tracing. We start from the eikonal equation, define a mismatching functional and derive the gradient of the nonlinear functional by an adjoint state method. The resulting forward and adjoint problems can be efficiently solved by using the fast sweeping method; a limited memory BFGS method ... |
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| Exploiting Instruction Level Parallelism in Geometry Processing for Three Dimensional Graphics Applications |
2006 |
12 pages |
| Authors:
Chia-Lin Yang; Barton Sano; Alvin R. Lebeck; DUKE UNIV DURHAM NC DEPT OF COMPUTER SCIENCE
|
| Three-dimensional (3D) graphics applications have become very important workloads running on today's computer systems. A cost-effective graphics solution is to perform geometry processing of 3D graphics on the host CPU and have specialized hardware handle the rendering task. In this paper, the authors analyze microarchitecture and SIMD instruction set enhancements to a RISC superscalar processor for exploiting instruction-level parallelism (ILP) in geometry processing for 3D computer graphics. The results show ... |
|
| Gray-Scale Lithography for MEMS Applications |
2006 |
3 pages |
| Authors:
Christopher M. Waits; Reza Ghodssi; Madan Dubey; ARMY RESEARCH LAB ADELPHI MD
|
| Micro-electro-mechanical systems (MEMS) fabrication technologies originated directly from integrated circuit (IC) fabrication. IC devices require only two-dimensional or planar structures to be fabricated because there are no mechanical operations taking place. Therefore, structures fabricated for MEMS devices have been traditionally designed with nominally vertical sidewalls (anisotropic etching), undercut sidewalls (wet isotropic etching), or sidewalls that have limited angles due to the crystallographic orientation of the substrate (wet anisotropic etching). A ... |
|
| Three-Dimensional Finite-Volume ELLAM Implementation |
2006 |
9 pages |
| Authors:
C. I. Heberton; T. F. Russell; L. F. Konikow; G. Z. Hornberger; COLORADO UNIV AT DENVER
|
| A three-dimensional finite-volume Eulerian-Lagrangian Localized Adjoint Method (ELLAM) has been developed, tested, and successfully implemented as part of the U.S. Geological Survey (USGS) MODFLOW/MOC3D ground-water modeling package. The USGS ELLAM code simulates solute transport in ground water for a single dissolved constituent subject to advective transport, hydrodynamic dispersion (including mechanical dispersion and diffusion), mixing from fluid sources, and simple chemical reactions (including linear sorption and decay). The implementation conserves mass ... |
|
| Direct-Write Assembly of Three-Dimensional Photonic Crystals: Conversion of Polymer Scaffolds to Silicon Hollow-Woodpile Structures |
20 DEC 2005 |
6 pages |
| Authors:
Gregory M. Gratson; Florencio Garcia-Santamaria; Virginie Lousse; Mingjie Xu; Shanhui Fan; Jennifer A. Lewis; Paul V. Braun; ILLINOIS UNIV AT URBANA-CHAMPAIGN BECKMAN INST AND COORDINATED SCIENCE LAB
|
| Impressive developments in silicon microfabrication are enabling new applications in photonics, microelectromechanical systems (MEMS), and biotechnology. Yet conventional Si microfabrication techniques require expensive masks and time-consuming procedures, including multiple planarization or bonding steps, to generate three-dimensional (3D) structures. In contrast, direct-write approaches, such as laser scanning and ink deposition, provide rapid, flexible routes for fabricating 3D micro-periodic structures. However, these approaches are currently limited to polymeric structures that lack the ... |
|
| Tangible GIS for Real-Time Human Interaction with Landscape Models |
01 DEC 2005 |
9 pages |
| Authors:
L. Mitas; H. Mitasova; C. Ratti; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MARINE EARTH AND ATMOSPHERIC SCIENCES
|
| New technologies that combine the flexibility of digital landscape representation with 3D physical scale models are changing users' interaction with geospatial data. This study investigated the coupling of open source GRASS Geographic Information System (GIS) with the Illuminated Clay system to explore the possible development of a Tangible Geospatial Modeling system that allows users to interact with landscape analysis and simulations using a flexible physical model. In this system, the ... |
|
| Eye-Safe Laser Radar 3-D Imaging |
01 DEC 2005 |
23 pages |
| Authors:
Roger Stettner; Howard Bailey; Richard Richmond; ADVANCED SCIENTIFIC CONCEPTS INC SANTA BARBARA CA
|
| This paper reviews the progress of Advanced Scientific Concepts, Inc (ASC) flash ladar 3-D imaging systems and presents their newest single-pulse 128 x 128 flash ladar 3-D images. The heart of the system, a multifunction ROIC based upon both analog and digital processing, is described. Of particular interest is the obscuration penetration function, which is illustrated with a series of images. An image tube-based low-laser-signal 3-D FPA is also presented. ... |
|
| Three-Dimensional Nano-Lithography for Emerging Technologies |
27 SEP 2005 |
11 pages |
| Authors:
Dennis W. Prather; DELAWARE UNIV NEWARK
|
| Grayscale lithography has shown particular success in the pursuit of surface machining capabilities because of the flexibility and convenience it offers in the fabrication of arbitrary three-dimensional surfaces. Accordingly, grayscale lithography has been demonstrated for a wide range of applications, including refractive and diffractive optical elements for focusing and beam shaping, optical interconnects, and MEMS. While our original motivation for this research area was the fabrication of three different micro-optical ... |
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| Materials and Modulators for True 3-Dimensional Displays |
SEP 2005 |
66 pages |
| Authors:
Michael Bass; UNIVERSITY OF CENTRAL FLORIDA ORLANDO SCHOOL OF OPTICS/CREOL
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| The research conducted in this program primarily concerned identification of materials that would serve in scalable real time 3D displays. Such materials would have to experience two photon absorption of two different wavelengths near infrared beams of light only at the intersection of the two beams. Upon such excitation the material would have to emit visible light. Our focus on scalable materials led us to first study organic dyes dissolved ... |
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| Through-Wall Synthetic Aperture Radar (TWSAR) 3D Imaging: Algorithm Design |
24 AUG 2005 |
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| Authors:
Greg B. Barrie; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Typical synthetic aperture radar (SAR) images are two-dimensional, providing range and azimuth information, but furnish few details with respect to elevation. One approach to extend SAR to three-dimensional imaging is to replace the single antenna element by an array of antenna elements. The simplest such implementation of this would be a linear array oriented vertically. This report contains two sections, the first outlining data and image processing for a threedimensional ... |
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| Packing in Two and Three Dimensions |
24 AUG 2005 |
176 pages |
| Authors:
Gustavo H. Martins; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH
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| This dissertation investigates Multidimensional Packing Problems (MD-PPs): the Pallet Loading Problem (PLP), the Multidimensional Knapsack Problem (MD-KP), and the Multidimensional Bin Packing Problem (MD-BPP). In these problems, there is a set of items, with rectangular dimensions, and a set of large containers, or bins, also with rectangular dimensions. Items cannot overlap (share the same region in space), and, when packed, must be completely located within the bin. We develop new ... |
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| Polarimetric Imaging Laser Radar (PILAR) Program |
01 MAY 2005 |
35 pages |
| Authors:
RICHARD D. RICHMOND; Bruno J. Evans; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
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| The US Air Force Research Laboratory has been developing the Polarimetric Imaging Laser Radar (PILAR) system. The purpose of the PILAR program is to demonstrate a 3-dimensional imaging laser radar sensor suitable for installation on an unmanned air vehicle (UAV). The program will demonstrate that such a sensor can be produced in a size and weight that is compatible with a UAV while maintaining sensor performance that meets mission requirements. ... |
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Reports by Keyword(s)
*THREE DIMENSIONAL
