| Multi-Scale Characterization of Inhomogeneous Morphologically Textured Microstructures (Preprint) |
Apr-2009 |
9 pages |
| Authors:
J E Spowart; G B Wilks; M A Tschopp; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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 | A computationally efficient microstructure characterization technique is presented that separately identifies morphological texture and any orientation dependence of second-phase clustering via a concise visual representation. This technique, the Vector Multi-Scale Analysis of Area Fractions (VMSAAF), is then applied to computer-generated microstructures to understand the effects of second-phase area fraction, aspect ratio, alignment propensity, variant orientation, and degree of microstructure banding on the homogenous length scale- a metric used to quantify ... |
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| Improved Chem/Bio Protection Clothing for Military Personnel by Probing Nanoscale Structure in Block Copolymers |
23-Dec-2008 |
7 pages |
| Authors:
Karen I Winey; PENNSYLVANIA UNIV PHILADELPHIA PA RESEARCH SERVICES
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| We report a systematic investigation of the morphology of sulfonated styrenic pentablock copolymer solutions and membranes obtained from Kraton Polymers LLC. The polymer studied was poly((t-butyl-styrene)-b-(ethylene-r-butylene)-b- (styrene-r-styrene sulfonate)-b-(ethylene-r-butylene)-b-(t-butyl-styrene)). Small angle x-ray scattering (SAXS) revealed that the solutions exhibited micellar morphologies. The solution SAXS data was modeled using the Kinning-Thomas model to obtain radius of the micelle core, the radius of closest approach between two micelles and the number density of ... |
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| Electro-Responsive Behaviour Multi-Wall Nanotubes/Gelatin Composites and Cross-Linked Gelatin Electrospun Mats |
11 FEB 2008 |
26 pages |
| Authors:
Soo-Young Park; KYUNGPOOK NATIONAL UNIV DAEGU (SOUTH KOREA) DEPT OF POLYMER SCIENCE
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| Swelling, states of water, morphology, stability in the aqueous solution, and electro-mechano- chemical bending behaviors of the gelatin/chitosan blend system were studied in order to clarify the potential use of this blend system as an actuator. The gelatin/chitosan blend system was prepared in order to avoid dissolution of the pure chitosan film system in an aqueous medium and the rigidity and easy degradation of the pure gelatin system in the ... |
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| Improved Pinning Morphology in HTS with Order of Magnitude Increase in Jc and Pinned Field |
27 JAN 2008 |
16 pages |
| Authors:
Bill W. Mayes; Roy Weinstein; HOUSTON UNIV TX OFFICE OF CONTRACTS AND GRANTS
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| In 2004 most scientists working to increase Jc in HTS believed that continuous columnar pinning centers (CCPCs) were ideal. This was based upon elegant ionic radiation studies yielding increased Jc. Our contrary evidence augered for performing an experiment comparing Jc for a wide range of pinning center (PC) continuities and diameters (including CCPCs) produced by high energy ions. (Increased discontinuity correlated with lower diameter.) Multiple-in-line-damage (MILD) PCs had not been ... |
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| Enhancement and Development of Numerical Models for Simulating Coastal Sediment Transport and Morphology Evolution |
01-Jan-2008 |
19 pages |
| Authors:
Hans Hanson; LUND UNIV (SWEDEN) DEPT OF WATER RESOURCES ENGINEERING
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| The main objectives of the research reported here were: (1) to develop an analytical model of erosion due to wave impact and sediment transport in the overwash; (2) to validate the model with high-quality field data; and (3) to develop methods to employ the model for estimating the statistical properties of morphological response in connection with storms based on long time series of input data on waves and water level. ... |
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| Regional Morphology Analysis Package (RMAP): Empirical Orthogonal Function Analysis, Background and Examples |
OCT 2007 |
22 pages |
| Authors:
Kenneth J. Connell; Magnus Larson; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| This System-Wide Water Resources Program (SWWRP) technical note describes software for analyzing beach profile and shoreline position data by means of Empirical Orthogonal Functions (EOFs) Patterns obtained through EOF analysis can often be related to the physical processes shaping the beach morphology and extend understanding of how the morphology responds to changes in the forcing (e.g. wave and water level conditions) or to anthropogenic activities (e.g., beach nourishment, coastal structures). ... |
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| Enhancement and Development of Numerical Models for Simulating Coastal Sediment Transport and Morphology Evolution |
OCT 2007 |
16 pages |
| Authors:
Hans Hanson; LUND UNIV (SWEDEN) DEPT OF WATER RESOURCES ENGINEERING
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| The GENESIS model has been successfully used in numerous prototype studies involving long-term beach evolution. The model represents longshore subaqueous sand transport processes. However, in many projects, subarial processes such as swash transport and dune erosion plays an important role, not only for the short-term storm erosion but also for the long term evolution. For this reason, the GENESIS modeling system was further developed to include these processes. The proposed ... |
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| Data Report: Laboratory Testing of Longshore Sand Transport by Waves and Currents; Morphology Change Behind Headland Structures |
AUG 2007 |
123 pages |
| Authors:
Mark B. Gravens; Ping Wang; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
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| Data from five series of movable bed laboratory experiments are presented in this report. These experiments were conducted in the Large-scale Sediment Transport Facility at the U.S. Army Engineer Research and Development Center, Vicksburg, MS. The data collected from these experiments is being used to improve longshore sand transport relationships under the combined influence of waves and currents and the enhancement of predictive numerical models of beach morphology evolution, in ... |
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| Identifying Novel Drug Targets for the Treatment of Tuberous Sclerosis Complex Using High Throughput Technologies. Addendum |
JUL 2007 |
22 pages |
| Authors:
David Sabatini; WHITEHEAD INST FOR BIOMEDICAL RESEARCH CAMBRIDGE MA
|
| In a patient with Tuberous Sclerosis Complex (TSC), the problematic cells that initiate and constitute tumors have lost TSC1 or TSC2 function. A promising approach for treatment would be to target members of the pathway with which TSC1/2 proteins interact. In cultured drosophila cells, we proposed to rapidly identify genes whose RNAa-mediated reduction in expression (1) Prevents growth proliferation of TSC1 or TSC2 deficient cells without affecting normal cells. (2) ... |
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| Role of Gradient and Multiscale Interface Morphology in Three-Dimensional Reinforcements in Composites (Preprint) |
APR 2007 |
10 pages |
| Authors:
Ajit K. Roy; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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| The interface morphology tailoring between the constituent phases in composites (e.g., fiber-matrix, inter-lamina, inter-yarn, nano-constituents-matrix, etc.) is essential in optimizing composite properties. In the case of composite strength, the mismatch of properties between the phases causes stress concentration at the interfaces, which in turn causes the initiation of damage and failure. A way of minimizing the mismatch of properties at the interface is demonstrated to reduce the interface stress concentration ... |
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| Community Sediment Transport Model |
2007 |
|
| Authors:
W. R. Geyer; Christopher R. Sherwood; Timothy Keen; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | The goal of this project is to produce an open-source model that couples hydrodynamics (circulation and waves), sediment transport, and morphodynamics. The need and value for such a model has been well established by previous NOPP-supported planning efforts (Sherwood et al., 2000; 2002) and the feasibility of the proposed approach has been demonstrated by incorporation of sediment-transport and morphology algorithms into the ONR-supported Regional Ocean Modeling System (ROMS). The model ... |
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| Morphology and Phase Transitions in Styrene-Butadiene-Styrene Triblock Copolymer Grafted with Isobutyl Substituted Polyhedral Oligomeric Silsesquioxanes (Postprint) |
2007 |
9 pages |
| Authors:
Daniel B. Drazowski; Andre Lee; Timothy S. Haddad; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
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| Two symmetric triblock polystyrene-butadiene-polystyrene (SBS) copolymers with different styrene content were grafted with varying amounts of isobutyl-substituted polyhedral oligomeric silsesquioxane (POSS) molecules. The POSS octamers, R'R7Si8O12 were designed to contain a single silane functional group, R', which was used to graft onto the dangling 1,2 butadienes in the polybutadiene block and seven identical organic groups, R=isobutyl (iBu). Morphology and phase transitions of these iBu-POSS modified SBS were investigated using small ... |
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| Unraveling Dynamic Mechanical Deformation in Segmented Polyurethanes: From High Strain-Rate Hardening to Complete Fold Recovery |
NOV 2006 |
8 pages |
| Authors:
A. J. Hsieh; J. Yi; B. D. Pate; M. C. Boyce; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MECHANICAL ENGINEERING
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| In light of the increased threat from terrorist activities in recent years, there is a critical need for lightweight transparent ballistic shield materials that are mechanically robust and have multi-functional properties. Transparent segmented polyurethanes (PU) in particular have shown potential for use as rigid ballistic shields and as lens materials for flexible C/B protective face masks. The performance specifications required for each application are quite different, and the current state-of-the-art ... |
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| Novel Role of Candidate Tumor Suppressor ANX7 Gene in Prostate Cancer |
01-Mar-2006 |
18 pages |
| Authors:
Meera Srivastava; HENRY M JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE ROCKVILLE MD
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| A detailed analysis of ANX7 levels in hundreds of prostate cancer specimens revealed that expression of this candidate tumor suppressor gene is specifically altered in metastatic and hormone refractory prostate cancers. Overexpression of ANXA7 killed prostate cancer cells by apoptosis. So we hypothesized that the ANX7 gene kills prostate cancer cells by increasing IP3-Receptor expression thereby potentiating the IP3-dependent apoptotic calcium signaling pathway. We found that the ANX7 induced apoptotic ... |
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| Processing, Properties and Morphology of Optical Limiting Silk Membranes |
28 FEB 2006 |
9 pages |
| Authors:
Ronald K. Eby; AKRON UNIV OH INST OF POLYMER SCIENCE
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| This Final Report is in memory of the PI: Professor Ronald Eby who passed away in Sep 2006. The goal of his program was to provide the basis for membranes and coatings that will absorb strong IR radiation to protect DOD sensors. Their approach is to use the Green Fluorescent Protein (GFP) to provide the absorption and silk protein to provide a good compatible matrix. They have previously demonstrated that ... |
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| Reply to "The Morphological Response Time Of Nearshore Profiles" |
06 JAN 2006 |
5 pages |
| Authors:
Nathaniel G. Plant; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MARINE GEOSCIENCES DIV
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| O'Hare and Huntley identify two problems in Plant et al. [2001] (hereafter, PRW2001), which ultimately lead them to conclude that sandbars and the "equilibrium" profile (as defined by PRW2001) may interact on the same timescales. We acknowledge the first problem (a mistake in a derivation) and find that the second problem raises an interesting point (how to correctly interpret an ad hoc treatment of Bagnold's efficiency factor). However, we find ... |
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| ATR Using Multi-view Morphing |
Aug-2005 |
38 pages |
| Authors:
Mubarak Shah; UNIVERSITY OF CENTRAL FLORIDA ORLANDO
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| In 2005, reviewed current research literature in view morphing and matching for single views, and discussed a feature based approach to sparse view morphing that also shows promise for compression of the model data corpus. Worked on a new Bayesian approach for the problem from a mid-level segmentation problem. We obtained good results for feature-based morphing, as well as preliminary demonstration of the novel object representation. In 2006, we completed ... |
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| An Unstructured Grid Morphodynamic Model with a Discontinuous Galerkin Method for Bed Evolution |
24 APR 2005 |
40 pages |
| Authors:
Ethan J. Kubatko; Joannes J. Westerink; Clint Dawson; NOTRE DAME UNIV IN DEPT OF CIVIL ENGINEERING AND GEOLOGICAL SCIENCES
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| A new unstructured grid two-dimensional, depth-integrated (2DDI), morphodynamic model is presented for the prediction of morphological evolutions in shallow water. This modelling system consists of two coupled model components: (1) a well verified and validated continuous Galerkin (CG) finite element hydrodynamic model; and (2) a new sediment transport/bed evolution model that uses a discontinuous Galerkin (DG) method for the solution of the sediment continuity equation. The DG method is a ... |
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| Novel Role of Candidate Tumor Suppressor ANX7 Gene in Prostate Cancer |
MAR 2005 |
18 pages |
| Authors:
Meera Srivastava; HENRY M JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE ROCKVILLE MD
|
| The purpose of this study is to determine the mechanism and the signaling pathway by which the ANX7 gene induces death of prostate cancer cells. The ANX7 induced apoptotic pathway involves calcium and cytochrome c release and morphological changes, nuclear fragmentation and chromatin condensation. Overexpression of ANX7 reduces the percentage of cells that are capable of responding to the IP3-generating agonist acetylcholine with a reduction in the magnitude of the ... |
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| Scenario Development and Force Requirements using Morphological Analysis |
01 FEB 2005 |
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| Authors:
Tomas Eriksson; Tom Ritchey; SWEDISH DEFENCE RESEARCH AGENCY STOCKHOLM
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| Morphological analysis (MA) is a non-quantified modelling method for structuring and analyzing technical, organizational and social problem complexes. It is well suited for developing scenarios, and the method is highly appropriate for complex cases where expertise from several areas is required. It is also useful for developing and relating operational and tactical scenarios to force requirements. Using MA for problem solving or scenario generation typically involves workshop sessions supported by ... |
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| Morphology and Properties of Model Block and Graft Copolymers |
27 JAN 2005 |
33 pages |
| Authors:
Samuel P. Gido; Jimmy W. Mays; MASSACHUSETTS UNIV AMHERST
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| For this project a number of new polymer materials were synthesized including trifunctional, tetrafunctional and hexafunctional regular graft copolymers. Additionally, a range of poly(cyclohexadiene) (PCHD) homopolymers and block copolymers containing PCHD blocks were prepared. The morphologies of the regular graft copolymers, and PCHD containing block copolymers were determined by TEM and SAXS. Additionally, the morphologies of cyclic block copolymers were studied and compared to their linear analogs. The tensile mechanical ... |
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| Monte Carlo Simulation of a Solvated Ionic Polymer with Cluster Morphology |
2005 |
31 pages |
| Authors:
Jessica L. Matthews; Emily K. Lada; Lisa M. Weiland; Ralph C. Smith; Donald J. Leo; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MATHEMATICS
|
| A multiscale modeling approach for the prediction of material stiffness of the ionic polymer Nafion is presented. Traditional rotational isomeric state theory is applied in combination with a Monte Carlo methodology to develop a simulation model of the conformation of Nafion polymer chains on a nanoscopic level from which a large number of end-to-end chain lengths are generated. The probability density function of end-to-end distances is then estimated and used ... |
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| Strategic Decision Support Modeling with Morphological Analysis |
2005 |
|
| Authors:
SWEDISH DEFENCE RESEARCH AGENCY STOCKHOLM
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| Morphological analysis: a generalized method for structuring and analyzing complex problem fields which are inherently non-quantifiable, contain non-resolvable uncertainties, cannot be causally modelled or simulated and require a judgmental approach. |
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| Morphology and Viscoelastic Properties of Polystyrene Blended with Fully Condensed Polyhedral Oligomeric Silsesquioxanes |
18 OCT 2004 |
38 pages |
| Authors:
Madhu Namani; Hai-Ping Geng; Andre Lee; Rusty L. Blanski; MICHIGAN STATE UNIV EAST LANSING DEPT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCE
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| Polyhedral oligomeric silsesquioxane (POSS) offers a unique approach to examine the effect of molecularly dispersed nanoscopic fillers on rheological properties of entangled polymer melts. Experiments were performed using a nearly-monodisperse molecular weight polystyrene (PS) blended with varying amounts of two fully condensed POSS molecules surrounded with phenethyl and styrenyl groups. Due to the chemical similarity between these organic moieties surrounding the silicon-oxygen framework (SiO1.5) of POSS and PS, we were ... |
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| Sedimentology of a Morphologically Complex Seafloor Environment, New Jersey Continental Shelf |
25 AUG 2004 |
5 pages |
| Authors:
Christopher K. Sommerfield; DELAWARE UNIV LEWES COLL OF MARINE STUDIES
|
| The overarching goal of this research was to advance our understanding of "geologic clutter", acoustic anomalies created by natural sub- seafloor features such as infilled paleochannels, using the continental shelf off New Jersey as a natural laboratory. As part of the ONR Geoclutter initiative, the objectives of this project were as follows: (1) to identify modern Holocene sedimentary processes responsible for the morphology and sedimentological heterogeneity of the seafloor; and ... |
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| The Influence of Bottom Morphology on Far Field Reflectance |
14 JUL 2004 |
12 pages |
| Authors:
Ronald V. Zaneveld; Emmanuel S. Boss; OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
|
| We have carried out analyses of the CoBOP field data in order to meet the objectives regarding the use of measured IOP in the models, Results of the analysis have been published in the Limnology and Oceanography special issue (Boss and Zaneveld, 2002). This paper analyzes the distribution of IOP near the bottom and in the water column of a shallow reef and sand area at Lee Stocking, Bahamas. We ... |
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| Surf Zone Eddies Coupled with Rip Current Morphology |
01-Jul-2004 |
16 pages |
| Authors:
Jamie H MacMahan; Ad J Reniers; Ed B Thornton; Tim P Stanton; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY
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| Energetic very low frequency (VLF) surf zone eddies (SZE) were observed on a beach composed of shore-connected shoals with quasi-periodic incised rip channels at Sand City, Monterey Bay, California. Incident waves consisted of predominantly shore-normal narrow-banded swell waves. SZEs were located outside the gravity region in along-shore wave number, spaced within the VLF band, and did not appear to exist in higher-frequency bands. The SZEs were significant and constant in ... |
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| Spectral Analysis of Breast Cancer on Tissue Microarrays: Seeing Beyond Morphology |
MAY 2004 |
39 pages |
| Authors:
David L. Rimm; YALE UNIV NEW HAVEN CT SCHOOL OF MEDICINE
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| Spectral imaging is a mechanism of tissue examination that combines spectral (color) with spatial information. The Varispec(tm) device fractionates the light into 10 nm bands and then collects images containing a full spectral profile for each pixel. The resulting spectral profile is then analyzed using a genetic algorithm based software package called GENIE. GENIE allows combination of spectral and spatial information for binary inclusion into user defined classes. This IDEA ... |
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| On the Generation of the Hubble Sequence Through an Internal Secular Dynamical Process |
2004 |
11 pages |
| Authors:
Xiaolei Zhang; NAVAL RESEARCH LAB WASHINGTON DC
|
| The secular evolution process, which slowly transforms the morphology of a galaxy over its lifetime, could naturally account for observed properties of the great majority of physical galaxies if both stellar and gaseous accretion processes are taken into account. As an emerging paradigm for galaxy evolution, its dynamical foundation had been established in the past few years, and its observational consequences are yet to be fully explored. The secular evolution ... |
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| Complex-Shaped Microcomponents by the Reactive Conversion of Biology Templates |
15 DEC 2003 |
16 pages |
| Authors:
Kenneth H. Sandhage; Rajesh Naik; GEORGIA TECH RESEARCH CORP ATLANTA
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| This project has been aimed at: 1)developing a better understanding of the manner in which the morphology and nanostructure of biologically-derived silica microtemplates evolve during the course of reactive conversion, and 2) determining which reaction parameters have the greatest impact on changes in morphology during such reactive conversion. The most significant accomplishments have been: Demonstration (via high resolution TEM analyses) that the reaction of SiO2 diatom frustules with Mg(g) at ... |
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| Anytime Coevolution of Form and Function |
01-Jan-2003 |
9 pages |
| Authors:
Magdalena D Bugajska; Alan C Schultz; NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR APPLIED RESEARCH IN ARTIFICIAL INTELLIGENCE
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| This paper describes an approach to continuous coevolution of form (the morphology) and function (the control behavior) for autonomous vehicles. This study focuses on coevolution of the characteristics such as beam width and range of individual sensors in the sensor suite, and the reactive strategies for collision-free navigation for an autonomous micro air vehicle. The results of the evolution of the system in a fixed simulation model were compared to ... |
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| Lateral Composition Modulation in InAs/GaSb Superlattices |
01-Jan-2003 |
6 pages |
| Authors:
D W Stokes; R L Forrest; J H Li; S C Moss; B Z Nosho; B R Bennett; L J Whitman; M Goldenberg; HOUSTON UNIV TX DEPT OF PHYSICS
|
| We report the analysis of lateral composition modulation in (InAs)m/(GaSb)m superlattices by x-ray diffraction. Vertical and lateral satellite peaks for a 140 period structure were observed. The lateral modulation wavelength, average superlattice composition, and vertical superlattice wavelength were determined. The lateral modulation was observed only along one in-plane direction resulting in quantum wire-like structures along the [110] direction. The unconventional structure of the lateral composition modulation, in which the stacking ... |
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| Step Structure and Surface Morphology of Hydrogen-Terminated Silicon: (001) to (114) |
2003 |
16 pages |
| Authors:
A. R. Laracuente; L. J. Whitman; NAVAL RESEARCH LAB WASHINGTON DC
|
| We have determined the equilibrium step structures and surface morphology for the whole range of monohydride-terminated (0 0 1) -terrace-plus-step silicon surfaces using scanning tunneling microscopy. The transformation in the equilibrium Si surface morphology caused by H-termination can be categorized into three different regimes delineated by the types of steps present on the clean surfaces. On nominal Si(0 0 1),the single-layer height B-type steps (SB) are mostly non-rebonded and rougher ... |
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| Characterization of the Morphology of Faceted Particles by Transmission Electron Microscopy |
NOV 2001 |
6 pages |
| Authors:
Shirley Turner; David S. Bright; NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD CHEMICAL SCIENCE AND TECHNOLOGY LAB
|
| Faceting in a polyhedral rutile particle was modeled from transmission electron microscopy images. A double-tilt, rotate transmission electron microscope (TEM) sample holder was used to manipulate the particle. Using this holder, it was possible to align the c axis of the particle along one of the axes of the sample holder. This alignment allowed images to be obtained of the particle in several orientations around its c axis. Assuming symmetrical ... |
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| Processing Effects on the Morphology of Hydrothermally Derived Nanocrystalline Lead Titanate |
NOV 2001 |
5 pages |
| Authors:
Zhiyuan Ye; Elliott B. Slamovich; Alexander H. King; PURDUE UNIV LAFAYETTE IN SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
|
| Nanocrystalline lead titanate was synthesized by reacting nanocrystalline titanium oxide in aqueous solutions of potassium hydroxide and lead acetate at 200 degrees C. X-ray diffraction (XRD) and TEM studies suggest that the initial KOH concentration influenced the nucleation and growth behavior of the lead titanate nanoparticles. Powders were processed in aqueous solutions containing 0.10 M lead acetate and a Pb:Ti ratio of 1, with varying concentrations of KOH. Powders processed ... |
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| Correction of Zoomed Morphology-Based Interpolation of Contours |
25 OCT 2001 |
|
| Authors:
Bruno Migeon; CHristophe Rosenberger; Pierre Marche; ORLEANS UNIV BOURGES (FRANCE) LAB VISION ET ROBOTIQUE
|
| In medical imaging, a 3D object must often be reconstructed from serial cross-sections. Usually, the cross- sections are not closely spaced so that interpolation is needed to solve the problem of anisotropy. Different interpolation technique exist, applied either on slices either on objects. Recently, a new contour interpolation method based on a zooming transform and on mathematical morphology has been developed. Thanks to the zooming transform, it works in any ... |
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| Watershed Boundaries and Relationship Between Stream Order and Watershed Morphology at Fort Benning, Georgia |
SEP 2001 |
40 pages |
| Authors:
Mark R. Graves; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
|
| This paper describes the procedures followed to develop a detailed watershed database for Fort Benning, Georgia, and the surrounding area. In addition, the relationship between watershed morphology and stream order was examined. Watershed order and a number of variables describing surface topography and the network were computed and statistical analysis procedures were used to develop a predictive relationship. Watershed boundaries were computed from a digital elevation model and assigned an ... |
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| Soot Morphology in Unsteady Counterflow Diffusion Flames |
19 JUN 2001 |
4 pages |
| Authors:
William Roberts; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| As Diesel engines consume the majority of the injected fuel in diffusion controlled combustion processes compared to the relatively short initial premixed phase, and diffusion flames have a greater propensity to form soot, particulate matter emission from Diesel engines can considerable. These particles have a much stronger thermal signature compared to gas phase products, water and carbon dioxide, and render Diesel-powered vehicles susceptible to tracking and targeting via IR sensors. ... |
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| Morphodynamics of the Mississippi River: Final Report (and) Appendix C: Data Files on Compact Disc (CD-ROM) |
JUN 2001 |
|
| Authors:
Colin R. Thorne; Oliver P. Harmar; Nicholas Wallerstein; NOTTINGHAM UNIV (UNITED KINGDOM) DEPT OF GEOGRAPHY
|
| ELECTRONIC FILE CHARACTERISTICS: 492 files; Data, Hypertext and Macro Programming Text; MS Excel. PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 167 MB. SYSTEMS DETAIL NOTE: IBM-clone PC-compatible. ABSTRACT: The Lower Mississippi River, extending from Cairo, Illinois to the Gulf of Mexico, annually transports approximately 170 million tonnes of sediment. Historically, the quantity and calibre of sediment derived from catchment erosion have been affected by changes in ... |
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| Semipermeable Membrane From Ionomeric Self-Assembling Block Copolymer |
FEB 2001 |
34 pages |
| Authors:
Dawn N. Crawford; Eugene Napadensky; Nora C. Tan; Jim Sloan; David A. Reuschle; ARMY RESEARCH LAB ADELPHI MD
|
| Morphological studies have been performed on novel polystyrene- polyisobutylene- polystyrene (PS-PlB-PS) triblock copolymer films made by different processes. The PS-PIB-PS films are composed of approximately 30% polystyrene end blocks. Small-angle x-ray scattering (SAXS) and transmission electron microscopy (TEM) confirm that a self-assembled, segregated cylindrical morphology forms in the copolymer. Dynamic mechanical analysis (DMA) is used as a tool to investigate the structure-property relationships in these polymers. Fourier-transform infrared (FTIR) spectroscopy ... |
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| A Downhill Simplex Algorithm for Estimating Morphological Degradation Model Parameters |
FEB 2001 |
15 pages |
| Authors:
Tapas Kanungo; Qigong Zheng; MARYLAND UNIV COLLEGE PARK CENTER FOR AUTOMATION RESEARCH
|
| Noise models are crucial for designing image restoration algorithms, generating synthetic training data, and predicting algorithm performance. However, to accomplish any of these tasks, an estimate of the degradation model parameters is essential. In this paper we describe a parameter estimation algorithm for a morphological, binary image degradation model. The inputs to the estimation algorithm are i) the degraded image, and ii) information regarding the font type (italic, bold, serif, ... |
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| Generalized Feature Extraction for Structural Pattern Recognition in Time-Series Data |
FEB 2001 |
120 pages |
| Authors:
Robert T. Olszewski; CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE
|
| Pattern recognition encompasses two fundamental tasks: description and classification. Given an object to analyze, a pattern recognition system first generates a description of it (i.e., the pattern) and then classifies the object based on that description (i.e., the recognition). Two general approaches for implementing pattern recognition systems, statistical and structural, employ different techniques for description and classification. Statistical approaches to pattern recognition use decision-theoretic concepts to discriminate among objects belonging ... |
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| Morphological Degradation Models and their Use in Document Image Restoration |
FEB 2001 |
20 pages |
| Authors:
Qigong Zheng; Tapas Kanungo; MARYLAND UNIV COLLEGE PARK CENTER FOR AUTOMATION RESEARCH
|
| Document images undergo various degradation processes. Numerous models of these degradation processes have been proposed in the literature. In this paper we propose a model-based restoration algorithm. The restoration algorithm first estimates the parameters of a degradation model and then uses the estimated parameters to construct a lookup table for restoring the degraded image. The estimated degradation model is used to estimate the probability of an ideal binary pattern, given ... |
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| Baseline Channel Morphology and Bank Erosion Inventory of South Fork Campbell Creek at Campbell Tract, Anchorage, Alaska, 1999 and 2000 |
2001 |
73 pages |
| Authors:
Janet H. Curran; DEPARTMENT OF THE INTERIOR WASHINGTON DC
|
| South Fork Campbell Creek drains largely undeveloped land in Anchorage, Alaska, but supports heavy use near the Bureau of Land Management (BLM) Campbell Tract facility for recreation and environmental education. To help assess the impacts of human activities in the basin on biological communities, particularly aquatic and terrestrial biota, morphological changes to the channel bed and banks were monitored for 2 years. Erosion conditions and rates of change were measured ... |
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| A NMR Study of Penetrant Diffusion in Nafion and the Associated Morphological Structure |
28 SEP 1999 |
26 pages |
| Authors:
P. T. Inglefield; A. A. Jones; W.-y. Wen; CLARK UNIV WORCESTER MA DEPT OF CHEMISTRY
|
| Pulsed field gradient NMR was used to determine the self diffusion constants for water and ethanol in Nafion (Dupont trademark) as a function of temperature and concentration. Typical values for water range from 3x10(exp -7) sq cm/sec at a temperature of 300K and a concentration of 2.5 wt% water to 1x10(exp -3)sq cm/sec at a temperature of 360K and a concentration of 24 wt%. The ... |
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| Antifreeze Polypeptides as Biomineralization Models |
25 OCT 97 |
6 pages |
| Authors:
Richard A. Laursen; TRUSTEES OF BOSTON UNIV MA
|
| During the past three years we have focused on three specific aims: (1) understanding the mechanism of ice-binding by antifreeze polypeptides (AFPs) , (2) synthesis and characterization of peptides (CBPs) that alter the morphology of a mineral, calcite, and (3) characterizing the interaction between a specific CBP and calcite. In the course of pursuing aim (1), we discovered, in the longhorn sculpin, a new class (type W) of antifreeze protein ... |
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| Characterization of the Graphite/Epoxy Interface with Various Surface Treatments under Cyclic Loading |
12 MAY 97 |
101 pages |
| Authors:
James P. Ryan; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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| The effects of graphite surface modification on fatigue crack growth resistance of the graphite/epoxy interface were examined using flexural peel specimens. Edge surfaces of pryolitic graphite were treated in an oxygen plasma for various lengths of time and subsequently bonded to a toughened epoxy to form flexural peel specimens. Fatigue crack growth rates were measured for the plasma treated and untreated specimens as a function of strain energy release rate. ... |
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| Morphology and Property Control in Polymer Thin Films and Membranes through the Use of Self-Assembling Monomers |
28 JAN 97 |
7 pages |
| Authors:
Douglas L. Gin; CALIFORNIA UNIV BERKELEY DEPT OF CHEMISTRY
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| The formation of highly ordered polymer networks using liquid- crystalline (LC) monomers was studied in the context of developing new polymers for use as piezoelectric, dye laser host, and membrane materials. Photopolymerizable, crosslinkable monomers based on thermotropic and lyotropic LC's were sought for these purposes. A precursor to a suitable chiral smectic C monomer for the formation of noncentrosymmetric polymer networks has been synthesized. Two new crosslinkable dye molecules have ... |
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| Ion Scattering and Deposition: The Role of Energetic Particles in Thin Film Growth |
14 JAN 97 |
9 pages |
| Authors:
Barbara H. Cooper; CORNELL UNIV ITHACA NY LAB OF ATOMIC AND SOLID STATE PHYSICS
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| We have used Ultra High Vacuum Scanning Tunneling Microscopy (UHV- STM) to investigate the evolution of morphology on metal surfaces irradiated with energetic ion beams. Time-lapse images were used to observe the stability and decay of isolated islands and pits subsequent to the irradiation. We developed theoretical analytic models and Monte Carlo simulations to describe island decay. Key results are: (1) monolayer height islands and pits are formed in the ... |
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| A New Supernova Remnant Over the Galactic Centre |
1996 |
8 pages |
| Authors:
N. E. Kassim; D. A. Frail; NAVAL RESEARCH LAB WASHINGTON DC
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| Improved images and a newly determined spectrum - from 80 MHz to 15 GHz - have clarified the nature of the radio source GO.33 +0.04 at the Galactic Centre. Its non-thermal spectral index and its shell-like morphology favour an interpretation that it is a supernova remnant. Furthermore, the absorption characteristics of the continuum spectrum at the lowest frequencies and its elongation along the plane suggest that, like Sgr A East, ... |
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