| Creating, Using and Updating Thesauri Files for AutoMap and ORA |
26 Jul 2012 |
60 pages |
| Authors:
Abhinav Sangal; Kathleen M Carley; Neal Altman; Michael K Martin; CARNEGIE-MELLON UNIV PITTSBURGH PA INST OF SOFTWARE RESEARCH INTERNAT
|
 | AutoMap [1] is text analysis software that performs Network Text Analysis by running an automated process on a corpus of raw text data to generate one or more meta-networks which include the nodes and links representing relations among entities described. Automap uses thesaurus files [1] when creating meta-networks. These thesaurus files are list which allows the association of words or phrases found in texts with abstract concepts and/or node classes ... |
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| Endogenous Split Awards as a Bid Protest and Procurement Management Tool |
18 Jul 2012 |
74 pages |
| Authors:
Peter J Coughlan; William Gates; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
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| When competitors for a federal government contract feel that the contract has been unfairly or unlawfully awarded, they can protest the contract award. A protest stops a contract award while the protest is evaluated for merit and remedy, as appropriate. While legitimate award protests improve procurement efficiency, integrity, and accountability, frivolous award protests create significant contract delays and cost growth. There is increasing interest in mechanisms that reduce frivolous contract ... |
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| Endogenous Split Awards as a Protest Management Tool: A Modeling & Computational Approach |
May 2012 |
57 pages |
| Authors:
Peter J Coughlan; William Gates; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
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| Bid Protests & Split Awards: Agenda Managing bid protests in DoD procurement Simple model of bidding & protest process Split awards as a protest management tool Key question: What is the right split? Bids & prices with fixed split awards Bids & prices with endogeneous split awards |
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| Optimal Pulse Shapes for SHPB Tests on Soft Materials |
Dec 2011 |
20 pages |
| Authors:
Mike Scheidler; John Fitzpatrick; Reuben Kraft; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| For split Hopkinson pressure bar (SHPB) tests on soft materials, the goals of homogeneous deformation and uniform uniaxial stress in the specimen present experimental challenges, particularly at higher strain rates. It has been known for some time that attainment of these conditions is facilitated by reducing the thickness of the specimen or by appropriately shaping the loading pulse. Typically, both methods must be employed. Pulse shapes are often tailored to ... |
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| Model Based Studies of the Split D Differential Eddy Current Probe (Preprint) |
Nov 2011 |
10 pages |
| Authors:
Jeremy S Knopp; Mark P Blodgett; R D Mooers; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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| This paper presents preliminary modeling work of split D differential probes, in both regular differential and reflection modes. This work is a prelude for a more in-depth model validation study using split D type probes. A modeling comparison is made for both air and ferrite cores. Lastly, numerical and experimental results are compared. |
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| New Approaches to the Parameterization of Gravity-Wave and Flow-Blocking Drag due to Unresolved Mesoscale Orography Guided by Mesoscale Model Predictability Research |
30 Sep 2011 |
7 pages |
| Authors:
Stephen D Eckermann; NAVAL RESEARCH LAB WASHINGTON DC SPACE SCIENCE DIV
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| When surface flow impinges on orography with horizontal scales of 1-500 km, a variety of mesoscale dynamical responses can result, including gravity waves, upstream blocking, flow splitting and lee vortices. These dynamics produce important drag forces on the larger scale atmosphere. Because global numerical weather and climate prediction (NWCP) models under-resolve orography at these scales, all credible NWCP systems must include parameterizations of these missing orographic mesoscale drag (OMD) forces. ... |
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| Impact of Institutional- and Individual-Level Discrimination on Medical Care and Quality of Life among Breast Cancer Survivors |
Jul 2011 |
82 pages |
| Authors:
Scarlett Gomez; CANCER PREVENTION INST OF CALIFORNIA FREMONT
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| During this reporting period, we completed analysis and reported on the qualitative focus group and one-on-one interviews, finalized the survey and cognitive guide for testing the survey in the cognitive phase, completed translation of the survey and cognitive guide documents into Spanish, Chinese and Tagalog, and completed 36 total cognitive interviews with breast cancer survivors from 7 racial/ethnic groups. Because of the complexities of issues that were identified in the ... |
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| Molecular Phylogenetics of Aedes japonicus, a Disease Vector That Recently Invaded Western Europe, North America, and the Hawaiian Islands |
Jul 2010 |
11 pages |
| Authors:
Emilie C Cameron; RichArd C Wilkerson; Motoyoshi Mogi; Ichiro Miyagi; Takako Toma; Heung-Chul Kim; Dina M Fonseca; WALTER REED ARMY INST OF RESEARCH SILVER SPRING MD
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| We used two mitochondrial loci (nicotinamide adenine dinucleotide dehydrogenase subunit 4 and cytochrome oxidase II) and a nuclear locus (28S-D2 spacer) for a total of 1337 bp to evaluate the relationships among the four subspecies of Aedes (Finlaya) japonicus Theobald. Ae. j. japonicm was recently introduced into the United States and has been expanding rapidly. We also included in our analysis a morphologically very closely related species, Aedes (Finlaya) koreicus ... |
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| Study of Spin Splitting in GaN/AlGaN Quantum Wells |
11-May-2009 |
6 pages |
| Authors:
Ikai Lo; Jih-Chen Chiang; NATIONAL SUN YAT-SEN UNIV KAOHSIUNG (TAIWAN) DEPT OF PHYSICS
|
| In the past year, the electronic properties of device-quality InGaN/GaN and AlGaN/GaN quantum wells were investigated by optical and transport measurements. Spin splitting of two-dimensional electron gas in GaN/AlxGa1-xN heterostructures were studied in detail. The result of the investigation can be separated into two parts. One is the study of HEMT made of AlGaN/GaN heterostructures, from the sample growth (by MBE) to the device process (by FIB), to investigate the ... |
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| A Wigner Distribution Analysis of One Dimensional Scattering |
Mar-2009 |
87 pages |
| Authors:
Brent R Lacy; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| We applied the Wigner Distribution Function, a distribution function of time and frequency based on an initial function of either of those variables, to a series of time based correlation functions. These time based correlation functions were the result of a 1-dimensional free particle wave packet, the reactant wave function, which had propagated through a quantum potential well and then had components of the reactant wave function that exited the ... |
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| Evaluation of the StressWave Cold Working (SWCW) Process on High-Strength Aluminum Alloys for Aerospace |
Feb-2009 |
61 pages |
| Authors:
Eric T Easterbrook; Michael A Landy; STRESSWAVE INC KENT WA
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| This report was developed under a SBIR contract. A new and innovative cold working process called StressWave Cold Working (SWCW) was investigated and compared to the conventional split sleeve cold working method that is used to enhance the fatigue life of fastener holes in high strength aluminum alloys used on USAF aircraft structures. StressWave cold working was found to be superior in enhancing fatigue lives compared to split sleeve cold ... |
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| LGIST: Learning Generalized Image Schemas for Transfer |
Feb-2008 |
31 pages |
| Authors:
Paul Cohen; Carole Beal; UNIVERSITY OF SOUTHERN CALIFORNIA MARINA DEL REY INFORMATION SCIENCES INST
|
| This research was funded under a Thrust D award to develop algorithms for gist memory. Gists are abstractions that preserve the important causal events in activities or episodes, eliding details. The point of this research was to develop a new kind of representation, image schemas, and associated learning methods. The learning agent was called Jean. Jean is a model of early cognitive development based loosely on Jean Piaget's theory of ... |
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| Left Handed Materials Research for Air Force Applications |
02 JAN 2008 |
4 pages |
| Authors:
Sheldon Schultz; CALIFORNIA UNIV REGENTS SAN DIEGO LA JOLLA CA
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| The words "Left Handed Materials" in the Title were one early way of expressing what is now termed "Negative Index (of refraction) Metamaterials" or NIMs In our proposal for this grant we focused on four general Goals: (1) Lowering the losses for the wire and SRR (split ring resonators) based unit cell construction designed to produce a desired negative permittivity (c) and negative permeability (micron) set of values. (2) Extend ... |
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| Processing of Training Range Soils for the Analysis of Energetic Compounds |
SEP 2007 |
34 pages |
| Authors:
Alan Hewitt; Susan Bigl; Marianne Walsh; Sylvie Brochu; Kevin Bjella; Dennis Lambert; ENGINEERING RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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| Large soil samples are often necessary to represent areas where analytes are distributed as particulates. Proper processing of these large samples impose additional time, space, and equipment requirements on the laboratory community servicing environmental programs to investigate military training ranges. Part of this study evaluated the robustness of two methods used to process large soil samples for the determination of energetic munitions residues whole sample mechanical grinding (comminution) and solvent ... |
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| Feasibility Investigation into Strengthening of Timber Bridge Stringers |
MAY 2007 |
142 pages |
| Authors:
Anthony J. Lamanna; Arda Akbiyik; James C. Ray; Gerardo I. Velazquez; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
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| The majority of timber bridges in the United States are nearing the end of their service life. They exhibit several types of damage, which occurs in their structural elements such as timber stringers. The most commonly encountered damage type in timber stringers in bridge structures is horizontal splits. Researchers investigated the feasibility of repairing timber stringers that showed signs of horizontal splitting along the length of the member. Timber stringer ... |
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| Photonic Band Gap Devices for Commercial Applications |
12 OCT 2006 |
43 pages |
| Authors:
Ahmed Sharkawy; Shouyuan Shi; Caihua Chen; Dennis Prather; EM PHOTONICS INC NEWARK DE
|
| In our effort to develop and demonstrate the design, fabrication, and experimental characterization of functional photonic crystal devices in both 2D and 3D structures, we identified various tasks and goals towards achieving the proposed applications. Two-dimensional photonic crystal structures will be used for in-plane optical signal distribution and routing while three-dimensional structures will be used for out-plane signal distribution, to provide high-density optically interconnected optoelectronic PhC circuits to distribute the ... |
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| Rough Set Based Splitting Criterion for Binary Decision Tree Classifiers |
26-Sep-2006 |
182 pages |
| Authors:
Dariusz G Mikulski; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND WARREN MI
|
| Pattern recognition applications often use inductive reasoning to find hidden relationships and concepts within a data set. Many computational models and heuristics exist to assist in induction [12, 14, 18, 22, 26, 37]. Even so, researchers continue to actively develop new inductive methods [8, 10, 45, 46]. The research in this thesis advances induction for pattern classification by presenting the derivation and application of a new measure of inlon%ation based ... |
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| Experimental Investigation of the Aerodynamic Ground Effect of a Tailless Lambda-Shaped UCAV with Wing Flaps |
JUN 2006 |
209 pages |
| Authors:
Jason T. Mostaccio; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| This experimental study adequately identified the ground effect region of a lambda-shaped unmanned combat air vehicle (UCAV). The lambda planform used in this study was originally tested in a previous experiment to determine the stability and control characteristics generated out-of-ground-effect. The following study extends the existing database by analyzing the inherent aerodynamic behavior that is produced by employing trailing edge flap deflections while flying in-ground-effect (IGE). To accomplish this objective, ... |
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| Part II - Effects of Cross-Sectional Partitioning on Active Noise Control in Round Ducts |
MAY 2006 |
37 pages |
| Authors:
Jeremy M. Slagley; Steven E. Guffey; WEST VIRGINIA UNIV MORGANTOWN DEPT OF INDUSTRIAL ENGINEERING
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| Active noise control (ANC) is particularly useful in hard-walled ducts where plane waves propagate. Higher order mode waves are much more difficult to control Basic acoustic principles dictate that the cut-on frequency at which higher order modes will first begin to eclipse simple plane waves in a duct will be determined by the cross-sectional diameter of the duct. The lowest frequency for higher order modes will increase as duct diameter ... |
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| High-Frequency Electromagnetic Propagation/Scattering Codes |
31 DEC 2005 |
160 pages |
| Authors:
MONOPOLE RESEARCH THOUSAND OAKS CA
|
| The objective of our effort was to develop computational methods for constructing high-frequency asymptotic solutions in scattering on perfectly conducting objects. The emphasis of the first stage of our work was to describe high frequency phenomena in terms of numerically implemented evolution of wavefronts associated with the propagating waves. The wavefront evolution algorithm is implemented for the leading high frequency mechanisms including: free-space propagation, reflection on smooth surfaces, wave-front splitting ... |
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| High Frequency Electromagnetic Propagation/Scattering Codes |
DEC 2005 |
160 pages |
| Authors:
Thomas Jaroszewicz; Elizabeth Bleszynski; Marek Bleszynski; MONOPOLE RESEARCH THOUSAND OAKS CA
|
| The objective of our effort was to develop computational methods for constructing high-frequency asymptotic solutions in scattering on perfectly conducting objects. The emphasis of the first stage of our work was to describe high frequency phenomena in terms of numerically implemented evolution of wave-fronts associated with the propagating waves. The wave-front evolution algorithm is implemented for the leading high frequency mechanisms including: free-space propagation, reflection on smooth surfaces, wave-front splitting ... |
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| Management of the Contracts and Grants Used to Construct and Operate the Babylon Police Academy |
26 OCT 2005 |
42 pages |
| Authors:
OFFICE OF INSPECTOR GENERAL ARLINGTON VA SPECIAL INSPECTOR GENERAL FOR IRAQ RECONSTRUCTION
|
| audit report is one of a series of reports addressing controls over cash, contract management, and grant management for the Coalition Provisional Authority South-Central Region. This audit report discusses the deficiencies in the Coalition Provisional Authority South-Central Region s process for managing 11 contracts, 4 grants, and 1 grant modification awarded for more than $7.3 million establish and operate the Babylon Police Academy (the Academy). |
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| The Microwave Behavior of an Anisotropic Negative Index Medium |
24 OCT 2005 |
11 pages |
| Authors:
J. S. Derov; B. W. Turchinetz; E. E. Crisman; A. J. Drehman; S. R. Best; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
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| Free space microwave measurements are reported for a split ring and post type metamaterial which exhibits negative refraction in a frequency band between 13.5 and 14.5 GHz. Varying azimuthal angles and magnitudes are achieved by changing the polarization of the transmitter and receiver relative to each other and to the anisotropic axes of the material. The amplitude of the cross-polarized transmission has been measured at 50% of the co-polarization level. ... |
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| A Systematic Approach to Higher-Order Parabolic Propagation in a Weakly Range-Dependent Duct |
28 SEP 2005 |
33 pages |
| Authors:
Robert F. Gragg; NAVAL RESEARCH LAB WASHINGTON DC ACOUSTICS DIV
|
| Energy-conserving transformations are exploited to split a monochromatic field in a weakly inhomogeneous waveguide into a pair of components that undergo uncoupled parabolic propagation in opposite directions along the waveguide axis. A systematic series of such transformations is developed to accomplish this splitting at increasing order of approximation while avoiding backscatter. In order to emphasize fundamentals, this technique is applied in what is arguably the simplest nontrivial case: waves of ... |
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| Dantzig-Wolfe Decomposition for Solving Multi-Stage Stochastic Capacity-Planning Problems |
13-Jul-2005 |
31 pages |
| Authors:
Kavinesh J Singh; Andy B Philpott; R K Wood; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH
|
| We describe a general multi-stage stochastic integer-programming model for planning discrete capacity expansion of production facilities. A scenario tree represents uncertainty in the model. Variable splitting leads to two forms of this model: the first allows multiple expansions of each facility over the planning horizon while the second allows at most one. Dantzig-Wolfe decomposition of either split-variable model results in a binary master problem that solves easily, as its linear-programming ... |
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| Population Structure and Evolution of the Bacillus cereus Group |
DEC 2004 |
13 pages |
| Authors:
Fergus G. Priest; Margaret Barker; Les W. Baillie; Edward C. Holmes; Martin C. Maiden; HERIOT-WATT UNIV EDINBURGH (UNITED KINGDOM)
|
| Representative strains of the Bacillus cereus group of bacteria, including Bacillus anthracis (11 isolates), B. cereus (38 isolates), Bacillus mycoides (1 isolate), Bacillus thuringiensis (53 isolates from 17 serovars), and Bacillus weihenstephanensis (2 isolates) were assigned to 59 sequence types (STs) derived from the nucleotide sequences of seven alleles, glpF, gmk, ilvD, pta, pur, pycA, and tpi. Comparisons of the maximum likelihood (ML) tree of the concatenated sequences with individual ... |
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| Anisotropic Diffusion Despeckling for High Resolution SAR Images |
NOV 2004 |
7 pages |
| Authors:
Chen Xi; Wang Chao; Zhang Hong; Tang Yixian; BEIJING NORMAL UNIV (CHINA)
|
| The main purpose of this work is to perform a new denoising method based on a nonlinear anisotropic diffusion for the reducing of the multiplicative speckle in high resolution Synthetic Aperture Radar (SAR) images. In order to be applicable to the sampled data and reduce computing complexity, an efficient discretization scheme, e.g. additive operator splitting (AOS) scheme, is chosen here for the proposed approach. Examples are given comparing the new ... |
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| Time Development of Recurrent Nova CI Aquilae's 2000 Outburst Between 0.8 and 2.5 Microns |
FEB 2004 |
10 pages |
| Authors:
David K. Lynch; J. C. Wilson; Richard J. Rudy; Catherine Venturint; Stephan Mazuk; Neal A. Miller; Richard C. Puetter; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GREENBELT MD GODDARD SPACE FLIGHT CENTER
|
| We report 0.8 2.5 micrometer spectrophotometry of CI Aquilae at eight epochs between 2000 May 9 and 2001 June 2 UT, corresponding to approximately 3 and 391 days after peak brightness. Near peak brightness, the spectra showed emission lines that were characteristic of a low-excitation, nitrogen-rich shell. Within a few weeks, the spectra began to show higher excitation/ionization emission lines indicative of a harder illuminating source: the neutral metal lines ... |
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| New Spectroscopic Data of Erbium Ions in GaN Thin Films |
2003 |
7 pages |
| Authors:
F. Pelle; F. Zuzel; J. M. Zavada; D. S. Lee; A. J. Steckl; CINCINNATI UNIV OH NANOELECTRONICS LAB
|
| Optical properties of erbium ions in MBE-grown GaN-thin films are reported. Three types of sites were identified using site selective laser excitation. The main center is ascribed to the Er3+ ions substituted in the Ga sub-lattice while the two other centers are assigned to Er-related defects. The lifetimes of the 4S3/2 and 4I13/2 multiplets of the main center are strongly quenched with increasing Er concentration. The complex decay profile of ... |
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| MBE Growth and Characterization of Hg Based Compounds and Heterostructures |
03 JUN 2002 |
10 pages |
| Authors:
C. R. Becker; X. C. Zhang; K. Ortner; J. Schmidt; A. Pfeuffer-Jeschke; WUERZBURG UNIV (GERMANY F R) PHYSIKALISCHES INST
|
| The molecular beam epitaxy (MBE) growth of Mercury Cadmium Telluride (Hg(1-x)Cd(x)Te) alloys and type III HgTe/Hg(1-x)Cd(x)Te heterostructures has been discussed, including similarities and differences between the (0 0 1) and (1 1 2)Beta orientations. Furthermore, the MBE growth of HgTe-based quantum wells (QWs) with the incorporation of Mn are additional topics. An investigation of the optical properties of type III superlattices with a normal band structure has lead to information ... |
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| Near-Field Photoluminescence Spectroscopy of Localized States in InGaAsN Alloys |
JAN 2002 |
6 pages |
| Authors:
A. M. Mintairov; P. A. Blagnov; T. Kosel; J. L. Merz; V. M. Ustinov; NOTRE DAME UNIV IN DEPT OF ELECTRICAL ENGINEERING
|
| We used near-field magneto-photoluminescence scanning microscopy to study structural and optical properties of quantum-dot-like compositional fluctuations in GaAsN and InGaAsN alloys. We show that these fluctuations manifest themselves by the appearance of narrow emission lines (half width 0.5-2 meV) at temperatures below 70 K. We estimated the size, density, and nitrogen excess of individual compositional fluctuations (clusters), revealing phase-separation effects in the distribution of nitrogen in GaAsN and InGaAsN. We ... |
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| Vibration Study of Nitrogen Incorporation in InGaAsN Alloys |
JUN 2001 |
4 pages |
| Authors:
A. M. Mintairov; P. A. Blagnov; J. L. Merz; V. M. Ustinov; A. S. Vlasov; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| We present an infrared (IR) reflectivity and Raman study of In(x) Ga(1-x)As(1-y)N(y) (x =0 and ^0.08, y ^0.03) alloys grown by molecular beam epitaxy. We observed: strong diagonal Raman components of GaAs-type phonons indicating a local trigonal distortion of the alloy lattice induced by nitrogen ordering; indium induced splitting of the Ga-N type vibration indicating a formation of different local nitrogen atomic arrangements; a sharp (halfwidth^1 cm(-1)) IR mode at ... |
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| 3D Digital Data-Storage Using Two-Photon Process: A Demonstration Task/ Novel Multifunctional Chromophores for Electro-Optic and Other Photonics Applications |
JUN 2001 |
8 pages |
| Authors:
Paras N. Prasad; STATE UNIV OF NEW YORK AT ALBANY RESEARCH FOUNDATION
|
| New opto-electronic and composite materials with enhanced photonic performance were developed and that applicators in 3D optical data-storage, 3D optical-circuitry, 3D micro-fabrications and photorefractivity were studied. Two-photo based technology was used to do photo-crosslinking at a precise volume location to produce complex 3D opticalcircuitry such a waveguide splitters and grating couplers as well as for fabricating MEMS. Another area of our activity bas been in preparation of photonic band gap ... |
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| Linearly-Polarized Photoluminescence from Type II ZnSe/BeTe Quantum Wells with Atomically-Flat Interfaces |
JUN 2001 |
4 pages |
| Authors:
A. A. Toropov; S. V. Sorokin; S. V. Ivanov; N. Hori; M. Ichida; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
|
| This paper reports on improvements in the MBE growth of ZnSe/BeTe QW heterostructures with ZnTe-like interfaces resulting in observation of two narrow oppositely polarized PL peaks. The peaks are attributed to recombination of holes localized by mono-layer fluctuations of the% BeTe QW thickness with electrons from either left or right ZnSe layer. This interpretation is in qualitative agreement with the estimation of the carries conflnement energies performed within the effective ... |
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| Electron and Nuclear Spin Interactions in the Optical Spectra of Single GaAs Quantum Dots |
28-May-2001 |
5 pages |
| Authors:
D Gammon; Al L Efros; T A Kennedy; M Rosen; D S Katzer; D Park; S W Brown; V L Korenev; I A Merkulov; NAVAL RESEARCH LAB WASHINGTON DC
|
| Fine and hyperfine splittings arising from electron, hole, and nuclear spin interactions in the magnetooptical spectra of individual localized excitons are studied. We explain the magnetic field dependence of the energy splitting through competition between Zeeman, exchange, and hyperfine interactions. An unexpectedly small hyperfine contribution to the splitting close to zero applied field is described well by the interplay between fluctuations of the hyperfine field experienced by the nuclear spin ... |
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| Region Segmentation via Deformable Model-Guided Split and Merge |
APR 2001 |
8 pages |
| Authors:
Lifeng Liu; Stan Sclaroff; BOSTON UNIV MA DEPT OF COMPUTER SCIENCE
|
| An improved method for deformable shape based image segmentation is described. Image regions are merged together and/or split apart, based on their agreement with an a priori distribution on the global deformation parameters for a shape template. Perceptually motovated crtieria are used to determine where/how to split regions, based on the local shape properties of the regions group's bounding contour. A globally consistent interpretation is determined in part by the ... |
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| Cost-Benefit Analysis of Single Siting Depot Level Maintenance for the Light Armored Vehicle |
DEC 2000 |
67 pages |
| Authors:
Ronald S. Wilson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In 1998, Commander, Marine Corps Logistics Bases established the Executive Planning Group (EPG) to develop and coordinate strategy to enhance the depots' maintenance and supply capabilities in order to increase the competitiveness of their services and provide a direction for future depot operations. One of the intiatives introduced by the EPG was to conduct an analysis to determine if consolidating depot maintenance for the LAV from the current workload scenario ... |
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| Technologies for Future Precision Strike Missile Systems - Missile Aeromechanics Technology |
SEP 2000 |
11 pages |
| Authors:
Eugene L. Fleeman; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
|
| This paper provides an assessment of the state-of-the-art of new aeromechanics technologies for future precision strike missile systems. The aeromechanics technologies are grouped into specific discussion areas of aerodynamics, propulsion, and airframe materials technologies. Technologies that are addressed in this paper are: *Missile aerodynamics technologies. Assessments include aerodynamic configuration shaping, lattice tail control, split canard control, forward swept surfaces, bank-to-turn maneuvering, and flight trajectory shaping. * Missile propulsion technologies. Assessments ... |
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| Changing Mass Applications in an Advanced Time Domain Ship Motion Program |
JUN 2000 |
|
| Authors:
Paul R. Wynn; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
 | Models are developed for a state-of-the-art time-domain ship motion program to predict ship motions during flooding and green water on deck events. Water mass from the flooding and green water is incorporated into the dynamic equations of motion using time-dependent mass and moment of inertia terms. Green water on deck includes three subproblems: the problem of water shipping on deck, the problem of motion of water trapped ... |
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| The Expeditionary Air Operations Center |
07 FEB 2000 |
26 pages |
| Authors:
Mark H. Simpson; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| Improvements in information technologies, and communications have produced dramatic efficiencies in many information dependent organizations. A long period of decreased military budgets, and a major decrease in force structure have created an environment where we must leverage new information technologies to create efficiencies that will increase combat power as described in Joint Vision 2020. The heavy and forward-based Air Operations Center is an organization where ... |
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| Static Tester for Characterization of Optical Near-Field Coupling Phenomena |
2000 |
7 pages |
| Authors:
Ferry Zijp; Yourii V. Martynov; PHILIPS RESEARCH LABS EINDHOVEN (NETHERLANDS)
|
| We present an experimental set-up for systematical studies of optical near-field coupling phenomena using a solid immersion lens (SIL) to surpass the conventional far field diffraction limit. The set-up incorporates a microscope objective lens with NA=0.80 in combination with a hemispherical SIL manufactured from glass with refractive index n=1.887 and a laser with a wavelength of 430 nm. Test samples are positioned within the evanescent decay distance from the bottom ... |
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| A Semiclassical Study of Tunneling Effects in Aziridine |
NOV 1999 |
31 pages |
| Authors:
Yin Guo; Angela K. Wilson; Cary F. Chabalowski; Donald L. Thompson; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The tunneling effects in the molecular inversion of aziridine are investigated. A full-dimensional potential was constructed based on ab initio results and used to study the effect of vibrational excitations on tunneling. Using the semiclassical approach that incorporates tunneling into classical trajectory calculations, it is found that excitations of all the modes except the reaction coordinate have negligible effects on tunneling. This allows accurate ... |
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| Slim-trees: High Performance Metric Trees Minimizing Overlap Between Nodes |
OCT 1999 |
18 pages |
| Authors:
Caetano Traina Jr.; Agma Traina; Bernhard Seeger; Christos Faloutsos; CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE
|
| In this paper we present the Slim-tree, a dynamic tree for organizing metric datasets in pages of fixed size. The Slim-tree uses the "fat-factor" which provides a simple way to quantify the degree of overlap between the nodes in a metric tree. It is well-known that the degree of overlap directly affects the query performance of index structures. There are many suggestions to reduce overlap in ... |
|
| Comparison of Two Cell-Based Assays for Screening Dioxin and Dioxin-Like Compounds in Sediments |
JUL 1999 |
12 pages |
| Authors:
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
|
| The purpose of this technical note is to report the results of studies comparing two cell-based assays as screening tools for dioxins and related compounds in sediments. The Reuber H4IIE rat hepatoma cell line and the recombinant 101L human hepatoma cell line were used to assay 2,3,7,8- tetrachlorodibenzo-p-dioxin (TCDD) toxic equivalents (TEQs) in split samples of the same sediment extracts. The two methods were compared for sensitivity and correlation with ... |
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| Mesoscopic Superconductors in Proximity to Nanomagnets |
18 JUN 1999 |
4 pages |
| Authors:
V. T. Petrashov; I. A. Sosnin; I. Cox; A. Parsons; C. Troadec; LONDON UNIV (UNITED KINGDOM)
|
| We report a study of electron transport through mesoscopic superconducting (aluminum) wires with ferromagnetic (nickel) and superconducting electrodes in the temperature range of 0.28-1.5 K in magnetic fields up to 5 T. We observe spectacular changes in the differential voltage-current characteristics, dV/dI vs I. when the measuring current is injected from the ferromagnetic electrodes: the dV/dII curves become non-symmetric with respect to the current direction and show the regions with ... |
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| Magnetic Field-Induced Type-I Type-II Transition in (ZuMu)Se/(ZaBe)Se Spin Superlattices |
18 JUN 1999 |
4 pages |
| Authors:
B. Koenig; U. Zehnder; D. R. Yakovlev; W. Ossau; T. Gerhard; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
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| We have performed a magnetooptical study on spin superlattice structures fabricated on the basis of (ZnMn)Se/(ZnBe)Se. The band alignment of a Zn(0.91)Mn(0.09)Se/ Zn(0.972)Be(0.028)Se superlattice was found to undergo a type-I to type-Il transition for one of the exciton spin component. This spin superlattice formation manifests itself in an asymmetric Zeeman splitting of a spatially direct exciton resulting from a spin dependent change of the exciton binding energy. A pronounced broadening ... |
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| Progressive Failure Modeling in Notched Cross-Ply Fibrous Composites |
MAR 1999 |
58 pages |
| Authors:
Linda E. Craugh; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The objective of this study was to model and simulate progressive failure initiating from a notch tip in a laminated fibrous composite subjected to tensile in-plane loading. The micro/macro-level approach was used for this study. The micro-level analysis used the 3-D unit cell model while macro-level analysis used the finite element analysis technique. A cross-ply laminate with double-edge notches was studied to investigate delamination, fiber splitting, and transverse matrix cracking ... |
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| Breast Cancer and Estrogen Biosynthesis in Adipose Tissue |
OCT 1998 |
185 pages |
| Authors:
Serdar E. Bulin; TEXAS UNIV AT DALLAS
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| The long-term objective of this application was to determine the cellular and molecular mechanisms responsible for increased aromatase expression in breast adipose fibroblasts proximal to malignant epithelial cells. Our results are supportive of the following hypothesis: Regional differences in relative proportions of histological components of the breast adipose tissue (e. g., fibroblasts vs. mature adipocytes) may be the primary cause of estrogenic concentration gradients, since regions ... |
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| Video Summarization by Curve Simplification |
JUL 1998 |
22 pages |
| Authors:
Daniel DeMenthon; Vikrant Kobla; David Doermann; MARYLAND UNIV COLLEGE PARK LANGUAGE AND MEDIA PROCESSING LAB
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| A video sequence can be represented as a trajectory curve in a high dimensional feature space. This video curve can be analyzed by tools similar to those developed for planar curves. In particular, the classic binary curve splitting algorithm has been found to be a useful tool for video analysis. With a splitting condition that checks the dimensionality of the curve segment being split, the video curve can be recursively ... |
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| Stretching the Umbilical Cord: The Theory, Practice and Future of the Split Air Operations Center |
JUN 1998 |
155 pages |
| Authors:
L. T. Wight; AIR UNIV MAXWELL AFB AL SCHOOL OF ADVANCED AIRPOWER STUDIES
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| This study addresses the question of whether or not the Air Force should continue to develop a Split Air Operations Center (AOC) capability whose components are geographically separated, electronically connected, and codependent for task accomplishment. The author analyzes the dilemma created by the Joint Forces Air Component Commander's (JFACC s) desire to collocate with both his AOC and the Joint Forces Commander (JFC) at a forward location, counterbalanced by the ... |
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Reports by Keyword(s)
SPLITTING
