| Theory and Application of an Eye-Point Dependent Metric for Multiresolution Terrain Models |
20-Oct-2008 |
11 pages |
| Authors:
William Ribarsky; Zachary Wartell; NORTH CAROLINA UNIV AT CHARLOTTE
|
 | We further developed our interactive visualization for terrain change detection and investigated a broader range of data structures for probabilistic surface modeling. Detecting changes in LIDAR scans creates an overwhelming number of change models. These models should be grouped into meaningful higher level events. For example, a set of 100 removed trees grouped into a deforestation event. These events would provide a semantic index into the set of change models. ... |
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| Globally Convergent Numerical Methods for Coefficient Inverse Problems |
23-Sep-2008 |
108 pages |
| Authors:
Michael V Klibanov; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Coefficient Inverse Problems (CIPs) for Partial Differential Equations (PDEs) represent a very important tool for such needs of the Army as imaging of unknown targets hidden in cluttered heterogeneous backgrounds. The goal of this project is the development of globally convergent numerical methods for a wide class of CIPs. These methods are tested on mathematical models of the interest to the Army such as imaging of antipersonnel land mines and ... |
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| Developing `Superbeams' for Improved Propagation Through Turbulence |
31 JAN 2008 |
14 pages |
| Authors:
Greg Gbur; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Studies of the behavior of partially coherent beams and other special beam classes on propagation through atmospheric turbulence were undertaken. A pair of new tools were developed to study the behavior of special beam classes in turbulence: a generator of partially coherent field realizations and an angular spectrum technique for propagating partially coherent fields in turbulence analytically. These tools were used in preliminary investigations of partially coherent fields and non-diffracting ... |
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| Resonant Optical Circuits Based on Coupling Between Whispering Gallery Modes in Dielectric Microresonators |
30 DEC 2007 |
|
| Authors:
Vasily N. Astratov; Wei Cai; Mohamed A.-Hasan; NORTH CAROLINA UNIV AT CHARLOTTE
|
 | The project was devoted to advancing understanding of the optical properties of mesoscopic systems of coupled spherical cavities. Using numerical modeling we studied optical coupling between spherical cavities with detuned whispering gallery mode (WGMs) resonances. The results were found to be in agreement with experiments performed on size-mismatched bispheres with controllable inter-cavity gaps. We observed a new type of optical modes termed "nanojet-induced modes" in straight chains of microspheres. Due ... |
|
| CRI Summer Conference (2005) on Inverse Scattering Held in Charlotte. North Carolina on May 30 - June 3, 2005 |
30 AUG 2005 |
43 pages |
| Authors:
Mike Fiddy; Sergey I. Kabanikhin; Akira Ishimaru; Francesco Zirilli; Greg Gbur; Qing Liu; Gary Brown; Marc Saillard; Lawrence Carin; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The Center for Optoelectronics and Optical Communications at the University of North Carolina at Charlotte hosted a workshop on Inverse Scattering from May 30th to June 3rd. Topics discussed included inverse surface reconstruction, inversion of objects in random media and below rough surfaces, inversion of penetrable and partially coated objects and properties of non-scattering scatterers. This was a residential workshop organized along the lines of a Gordon Conference, with talks ... |
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| Patterning of Cells on Bioresist for Tissue Engineering Applications |
13 JUL 2005 |
|
| Authors:
Yusif Umar; Muthiah Thiyagarajan; Craig Halberstadt; K. E. Gonsalves; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Engineering functional tissues and organs successfully depends on the ability to control cell orientation and distribution. Materials used for such purposes therefore have to be designed to facilitate cell distribution and eventually guide tissue regeneration in 3D. The field of tissue engineering hinges on developing degradable polymeric scaffolds that promote cell proliferation and expression of desired physiological behaviors through careful control of the polymer surface. The development of materials for ... |
|
| Policing and Psychopathy: The Case of Robert Phillip Hansen |
25 AUG 2004 |
50 pages |
| Authors:
J. S. Sanford; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The psychological construct of psychopathy has received considerable attention in the extant research. This is especially the case with respect to explaining the behavioral and personality dynamics of various offenders and criminal groups. Recently, the efficacy of the psychopathy concept has been extended outside the correctional context and applied to individuals and collectives in various organizational settings. One such environment, not yet subjected to scrutiny, is the occupation of policing ... |
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| Membrane Estrogen Receptor Alpha Targeting and its Association with SHC in Regulating Breast Cancer Cell Proliferation |
JUN 2004 |
37 pages |
| Authors:
Robert X-D Song; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Estrogen receptor a, (ERa), the dominant isoform in mammary gland, is a dual functional protein capable of acting as a transcriptional factor regulating gene transcription in the nucleus (genomic effect), or a signaling molecule on the membrane mediating estrogen rapid actions (non-genomic effect) to activate MAPK and Akt pathways. Currently, the functions of the nuclear ERa is very well studied, but the biological role of the membrane-associated ERa is still ... |
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| Inverse Nottingham Effects Cooling of Semiconductors with Resonant Tunneling |
31 MAR 2004 |
23 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Heat removal by Inverse Nottingham Effect (INE) is a new concept utilizing hot electrons emitted from the semiconductor surface into the vacuum via field emission. The replenishment of hot electrons in the semiconductor as a result of reestablishment of thermal equilibrium constitutes cooling. To avoid heating from current crowding, tips are replaced by a double barrier resonant tunneling structure (DBRT) at the surface of a semiconductor to allow efficient field ... |
|
| A New Type of Silicon Superlattice: Hetero-Epilattice |
27 MAY 2003 |
11 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| This paper introduces a new type of superlattice, consisting of a semiconductor such as silicon sandwiched between adsorbed oxygen atoms. Compared to heterojunction quantum structures, this type of superlattice allows a wider variety of man-made solid because of tolerance to interfacial strain. Experimentally, Si/O superlattice is epitaxial with defect density below 10(exp 9)/sq cm. A 9-period structure shows electroluminescence with a peak at 2.2eV, and an effective barrier height of ... |
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| Wavelet-Based Signal and Image Processing for Target Recognition |
30 NOV 2002 |
5 pages |
| Authors:
Barry G. Sherlock; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The PI visited NSWC Dahlgren, VA, for six weeks in May-June 2002 and collaborated with scientists in the G33 TEAMS facility, and with Marilyn Rudzinsky of T44 Technology and Photonic Systems Branch. During this visit the PI also presented six educational seminars to NSWC scientists on various aspects of signal processing. Several items from the grant proposal were completed, including (1) wavelet-based algorithms for interpolation of 1-d signals and 2-d ... |
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| Wavelet Based Feature Extraction for Target Recognition and Minefield Detection |
21 MAY 2002 |
7 pages |
| Authors:
Barry G. Sherlock; NORTH CAROLINA UNIV AT CHARLOTTE
|
| This project produced advances in the theory of wavelets and two- channel filter banks, and the development of new algorithms for the generation of wavelet filters and the wavelet based processing of image data, with a view towards their usefulness in image analysis for target recognition. These results include implementation of simulated annealing and Discrete Wavelet Transform algorithms, derivation of parameterizations for various useful spaces of wavelets, derivation of expressions ... |
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| Wavelet-Based Signal and Image Processing for Target Recognition |
2002 |
7 pages |
| Authors:
Barry G. Sherlock; NORTH CAROLINA UNIV AT CHARLOTTE
|
| For the initial year of the project new wavelet based signal and image processing algorithms were developed, specifically directed towards usefulness in target recognition applications. Classical spatial and frequency domain image processing algorithms were generalized to process discrete wavelet transform (DWT) data. Results include adaptation of classical filtering, smoothing and interpolation techniques to DWT. From 2003 the research direction changed, in keeping with changes in the direction of ONR's Probability ... |
|
| A Novel Principle for Data Processing from Hand-Held Ground Penetrating Radars |
26 JUN 2001 |
35 pages |
| Authors:
Michael V. Klibanov; Thomas R. Lucas; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The goal of this project was to develop a new algorithm of inverse problems to image locations and electrical properties of land mines using GPR data. These parameters, in turn, might be used on a next stage as an input for the classification procedure. Such a method has been developed and tested on models. Accurate images of mine-like targets are demonstrated. Comparison with the best competing algorithm in the field ... |
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| Challenges in Nanoelectronics |
JUN 2001 |
|
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The size of electronic devices has been decreasing to nanometer size regime which requires quantum mechanics to understand its operation and optimization. Many features associated with quantum effects are not all desirable from the engineering point of view: the charging of a nano-capacitor runs into Coulomb blockade: the dielectric constants of nanoparticles is much reduced: the binding energy of the shallow dopants in a nanoscale quantum dots becomes many times ... |
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| Wavelet-Based Feature Extraction for Target Recognition and Minefield Detection |
20 NOV 2000 |
5 pages |
| Authors:
Barry G. Sherlock; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The P.I. visited the Naval Surface Warfare Center (NSWC) in Dahlgren, VA, for one week in January to continue his established collaboration with NSWC personnel. In particular, the work with Ronald Gross on the development of a MATLAB demonstration suite, and with Dr. Addison Jump on wavelet theory, deserve mention. Details are given in Section II of the progress report. The collaboration with NSWC personnel has been ... |
|
| Twelfth International Symposium on Methodologies for Intelligent Systems (ISMIS'00) Held in Charlotte, North Carolina on October 11-14, 2000 |
14 OCT 2000 |
663 pages |
| Authors:
Zbigniew W. Ras; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The amount of on-line information is growing exponentially. Much of this information is unstructured and language-based. To deal with this flood of information, a number of tools and language technolo- gies have been developed. Progress has been made in areas such as in- formation retrieval, information extraction, filtering, speech recognition, machine translation, and data mining. Other more specific areas such as cross-lingual retrieval, summarization, categorization, distributed re- trieval, and topic ... |
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| Analysis of the Revised Army Career Transitions Survey (ACTS) and Comparison With the Fall 1996 Sample Survey of Military Personnel (SSMP): results and Recommendations |
APR 2000 |
38 pages |
| Authors:
Robert A. Giacalone; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The Army Career Transition Survey (ACTS) was an exit survey designed to measure soldier satisfaction with various aspects of Army life and to determine whether dissatisfaction with these aspects was related to leaving the Army. The purpose of the present study was to analyze the current ACTS data, to compare responses to ACTS items with responses to comparable items on the Sample Survey of Military Personnel ... |
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| Application of Artificial Neural Networks in the Design of Control Systems |
2000 |
8 pages |
| Authors:
Hong H. Mu; Y. P. Kakad; B. G. Sherlock; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The paper develops important fundamental steps in applying artificial neural networks in the design of intelligent control systems. Different architectures including single layered and multi layered of neural networks are examined for controls applications. The importance of different learning algorithms for both linear and nonlinear neural networks is discussed. The problem of generalization of the neural networks in control systems together with some possible solutions ... |
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| Wavelet Based Feature Extraction for Target Recognition and Minefield Detection |
20 NOV 1999 |
5 pages |
| Authors:
Barry G. Sherlock; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The P.I. spent the summer at the Naval Surface Warfare Center (NSWC) in Dahlgren, VA, working, on the project and providing general technical assistance and education to NSWC personnel. Productive collaboration included: development of Matlab demonstration suite (with Ron Gross), optimizing RF absorption characteristics of multilayer rubber surfaces (with Jack Shuler), and wavelet theory (with Addison Jump). Ph.D. student Steven Moore was self supporting for ... |
|
| In Search of Luminescence in Silicon |
18 NOV 1999 |
9 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Two schemes were studied: (1) IAG-Superlattices (Interface-Adsorbed- Gas) were fabricated in a silicon MBE system capable of exposure to oxygen at 10(exp -7) Torr for adsorption. Si deposition is between 5 to 20nm at room temperature with annealing temperature between 800 to 950C, forming 3nm Si nano- particles. Photoluminescence shows two peaks located at 1.7eV and 2.35eV. The former originates from the interior, whereas the latter ... |
|
| Multi-Resolution Wavelet Methods for the Simulation of Flames |
SEP 1999 |
7 pages |
| Authors:
Wei Cai; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The main results of this grant is a hybrid high order algorithm for the study of 2-D detonation waves, and the development of an adaptive wavelet ADI method as a direct pr as a preconditioner for implicit time depedent integration of viscous Navier Stokes equations. Convergence acceleration using the wavelet AD as a preconditioner is studied for the reaction diffusion equations. Also parallel implementation of the wavelet AD preconditioner is ... |
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| Nanoscopic Studies of Quantum Effects in Silicon Quantum Dots |
11 AUG 1999 |
7 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Under ARO supports, we have advanced the following fundamental knowledge in the man-made quantum phenomena: observation of resonant tunneling via the nano-particles of silicon embedded in a silicon dioxide matrix; theoretical models of dielectric constant, doping, capacitance and excitons in Si nano-particle, and visible light emission from superlattices consisting of alternate layers of silicon with adsorbed oxygen forming an epitaxial Si/O superlattice. Moreover this superlattice represents a new kind under ... |
|
| Studies of Silicon Nanocrystals |
28 FEB 1998 |
28 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Quantum mechanical devices utilize the wave nature of electrons for their operations whenever the electron mean-free-path exceeds the appropriate dimensions of the device structure. Some of the issues such as the tunneling time, the reduction of the dielectric constant and the drastic increase in the binding energy of dopants were studied. In the past several years, certain schemes appeared which may facilitate the realization of silicon quantum devices, such as ... |
|
| Holographic Optical Interconnects for Multichip Modules |
19 JUN 97 |
51 pages |
| Authors:
Michael R. Feldman; NORTH CAROLINA UNIV AT CHARLOTTE
|
| For the past few years we have been working on the development of an optically interconnected Multichip Module (MCM). The MCM is composed of a planar transparent substrate, containing thin film electrical connections. GaAs laser array chips and silicon CMOS VLSI chips with integrated photodetectors are flip- chip bonded to one side of the substrate, while Computer Generated Holograms (CGHs) are fabricated on the other side of the substrate. The ... |
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| Research on Relations between Wavelets and Operators |
1997 |
68 pages |
| Authors:
Xingde Dai; NORTH CAROLINA UNIV AT CHARLOTTE
|
| During the period of the support, I have done some work related with my research, education of graduate students, and application of my results in industry which will be described this in four sections as follows: (1) Some Results and Publications. (2) Ph.D. Thesis directed. (3) Conferences and Presentations. (4) Transition to Industry. |
|
| A Conference on Wavelets, Relations with Operators and Applications |
04 SEP 96 |
32 pages |
| Authors:
Xingde Dai; NORTH CAROLINA UNIV AT CHARLOTTE
|
| During July 24-28 there was a conference on 'Wavelets, relations with operators and applications'. Funding for this conference was provided by AFOSR, NSF and UNCC. There were 64 (including 3 from UNCC) participants registered for the Conference. This was an international conference. Participants are from eleven countries (including US). We exchanged ideas with the guide Weiss' group and David Larson's group and many other participants. New ideas and new problems ... |
|
| Measure of Creep Characteristics of Asphalt Concrete |
OCT 95 |
136 pages |
| Authors:
C. Liu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| This research sought to evaluate the shell procedures as a tool for predicting rutting of asphalt mixtures under simulated F-15 traffic. Half the asphalt mixtures used for the test sections were designed with marshall procedures and the balance with the Gyratory Testing Machine. Predictions of both mixtures were made with sample from the paver and from cores extracted from the mat. Creep characteristics were obtained with unconfined static and dynamic ... |
|
| International Workshop on Light Emission and Electronic Properties of Nanoscale Silicon |
APR 94 |
95 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE
|
| This workshop assembled significant recent research in electronic transport and luminescence in nanoscale silicon structures, together with a diverse selection of fabrication techniques, in order to begin to address the critical physics and fabrication issues in using this exciting new material for optoelectronic applications. |
|
| Ground-State Energies of One- and Two-Electron Silicon Dots in an Amorphous Silicon Dioxide Matrix |
15 JUN 1992 |
7 pages |
| Authors:
Davorin Babic; Raphael Tsu; Richard F. Greene; NORTH CAROLINA UNIV AT CHARLOTTE
|
| The one- and two-electron ground-state energies of a silicon sphere embedded in an amorphous silicon dioxide matrix are calculated as a function of the sphere size. The electron-electron interaction and polarization effects are treated by perturbation; our quantum-mechanical, calculation is valid for small spheres with radii between 10 and 40 A. For large spheres, classical electrostatics is used. A universal effective capacitance is defined in terms of the difference in ... |
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| Reconfigurable Interconnects Using Computer Generated Holograms and Spatial Light Modulators, |
22 MAY 1992 |
|
| Authors:
James E. Morris; Michael R. Feldman; NORTH CAROLINA UNIV AT CHARLOTTE
|
| An efficient method of implementing programmable optical interconnects is needed for communication between processors in optically interconnected VLSI processor arrays, between optical logic gates in optical computers, and between chips, modules and boards in general purpose VLSI systems. Previously proposed methods of implementing programmable connections with Spatial Light Modulators (SLM's) suffer from high power dissipation and/or long reconfiguration times. The use of SLM's to directly encode a hologram would result ... |
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| Motion of Continuous Fibers through a Newtonian Resin for High Fiber Volume Fraction, |
AUG 1990 |
|
| Authors:
L. N. Hjellming; J. S. Walker; NORTH CAROLINA UNIV AT CHARLOTTE
|
| This paper treats the motion of long, unidirectional, continuous fibers through a Newtonian resin. There is a consolidation force on the top row of fibers or an effective force on all the fibers due to their tension and curvature in a filament-wound cylinder. An asymptotic analysis for high fiber volume fraction is presented. The present rigorous asymptotic solution leads to the same expressions as a previous application of the lubrication ... |
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| Thermal Curing Cycles for Composite Cylinders with Thick Walls and Thermoset Resins, |
OCT 1989 |
|
| Authors:
L. N. Hjellming; J. S. Walker; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Autoclave temperature histories to cure thick-section composite cylinders with graphite fibers and thermoset resins are presented. The two cylinders considered have wall thicknesses of 0.15 m and 0.3 m. The first objective was to achieve a consolidation period when the resin viscosity is everywhere relatively low for a reasonably long period of time. The second objective was to complete curing with the constraint that the temperature never exceeds 180 deg ... |
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| Environmental and Water Quality Operational Studies. Morphologic Effects of Lower Mississippi River Dike Fields |
MAY 86 |
|
| Authors:
Nelson R. Nunnally; Linda B. Beverly; NORTH CAROLINA UNIV AT CHARLOTTE
|
| Dikes are used extensively on large, meandering rivers to help maintain navigation channels. Dike fields alter flow velocities and sedimentation patterns, thereby affecting river morphology and the amount and quality of aquatic habitat. Some investigators have theorized that sedimentation induced by the dike fields constructed on the lower Mississippi, largely since 1960, is altering river morphology and aquatic hatibat in a manner similar to the changes that have been observed ... |
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| Differences in Task Behavior and Attitudes in Two Organizational Settings by Race. |
30 JUN 1976 |
|
| Authors:
William R. Allen; John A. Ruhe; NORTH CAROLINA UNIV AT CHARLOTTE
|
| This report pulled together two studies in different organizational settings--a university and a naval recruit center. The ANOVA analysis compared differences and consistencies by tasks between leader race, subordinate race, group composition, group size, and settings on number of output and intervening variables such as productivity of groups, duration of speech, satisfaction, self-esteem, Bales IPA behavior. Group composition and size had a significant effect through both studies on the self-esteem ... |
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Reports by Corporate Author
