Now showing items 651-670 of 1823

• GENERALIZED REPLACEMENT IN ITERATIVE RESTORATION ALGORITHMS ﻿

(1983)
A new formulation of an iterative restoration algorithm is presented in this dissertation for the solution of noisy, non-linear restoration problems. The constraints and distortions are assumed to be known and are modeled ...
• Generation of diffraction-free beams for applications in optical microlithography ﻿

(1997-03-01)
A new concept based on a Fabry–Perot interferometer for the generation of nondiffracting Bessel beams is described and proposed for potential applications in microlithography such as the fabrication of small isolated ...
• Generation of nearly nondiffracting Bessel beams with a Fabry–Perot interferometer ﻿

(1997-11-01)
A new concept for generating zero-order Bessel beams was studied theoretically. The spatial intensity distribution was calculated numerically using a wave optics model. Approximate analytical expressions were derived to ...
• Genomic Detection Using Sparsity-inspired Tools ﻿

(2011)
Genome-based detection methods provide the most conclusive means for establishing the presence of microbial species. A prime example of their use is in the detection of bacterial species, many of which are naturally vital ...
• A Geometric Hidden Markov Tree Wavelet Model ﻿

(2003-08-01)
In the last few years, it has become apparent that traditional wavelet-based image processing algorithms and models have significant shortcomings in their treatment of edge contours. The standard modeling paradigm exploits ...
• Geometric Methods for Wavelet-Based Image Compression ﻿

(2003-08-01)
Natural images can be viewed as combinations of smooth regions, textures, and geometry. Wavelet-based image coders, such as the space-frequency quantization (SFQ) algorithm, provide reasonably efficient representations for ...
• Geometric Tools for Image Compression ﻿

(2002-11-01)
Images typically contain strong geometric features, such as edges, that impose a structure on pixel values and wavelet coefficients. Modeling the joint coherent behavior of wavelet coefficients is difficult, and standard ...
• Geometry Compression of Normal Meshes using Rate-Distortion Algorithms ﻿

(2003-06-01)
We propose a new rate-distortion based algorithm for compressing 3D surface geometry represented using triangular normal meshes. We apply the Estimation-Quantization (EQ) algorithm to compress normal mesh wavelet coefficients. ...

(1971)
• Getting Real: A Naturalistic Methodology for Using Smartphones to Collect Mediated Communications ﻿

(2012)
This paper contributes an intentionally naturalistic methodology using smartphone logging technology to study communications in the wild. Smartphone logging can provide tremendous access to communications data from real ...
• Giant Terahertz-Wave Absorption by Monolayer Graphene in a Total Internal Reflection Geometry ﻿

(2017)
We experimentally demonstrated significant enhancement of terahertz-wave absorption in monolayer graphene by simply sandwiching monolayer graphene between two dielectric media in a total internal reflection geometry. In ...
• Giant tunable Faraday effect in a semiconductor magneto-plasma for broadband terahertz polarization optics ﻿

(2012)
We report on a giant Faraday effect in an electron plasma in n- InSb probed via polarization-resolved terahertz (THz) time-domain spectroscopy. Polarization rotation angles and ellipticities reach as large as π/2 and 1, ...
• GNOMES: A Testbed for Low-Power Heterogeneous Wireless Sensor Networks ﻿

(2003-05-20)
Continuing trends in sensor, semiconductor and communication systems technology (smaller, faster, cheaper) make feasible very dense networks of fixed and mobile wireless devices for use in many different sensing and ...
• Gold coated iron phosphide core–shell structures ﻿

(2017)
Core–shell particles Fe2P@Au have been prepared beginning with Fe2P nanorods, nanocrosses and nanobundles prepared from the solvothermal decomposition of H2Fe3(CO)9(μ3-PtBu). Iron phosphide structures can be produced from ...
• Gold nanoshells: Optical properties and femtosecond electron dynamics ﻿

(1998)
The chemistry, optical properties, and femtosecond electron dynamics of gold nanoshells are described. The gold nanoshells consist of Au-coated Au$\sb2$S nanoparticles prepared via aqueous phase chemistry using HAuCl$\sb4$ ...
• Golden-Eye: A server-side location-sensing system for wireless LANs ﻿

(2004)
Determining the location of a wireless client is a key problem for location-aware systems and for security applications. Many recent studies have used Bayesian methods to determine location from wireless LAN signals, but ...
• GPU Accelerated Reconfigurable Detector and Precoder for Massive MIMO SDR Systems ﻿

(2015-12-02)
We present a reconfigurable GPU-based unified detector and precoder for massive MIMO software-defined radio systems. To enable high throughput, we implement the linear minimum mean square error detector/precoder and further ...
• GPU Accelerated Scalable Parallel Decoding of LDPC Codes ﻿

(2011-11-01)
This paper proposes a flexible low-density parity-check (LDPC) decoder which leverages graphic processor units (GPU) to provide high decoding throughput. LDPC codes are widely adopted by the new emerging standards for ...
• A GPU Implementation of a Real-Time MIMO Detector ﻿

(2009-10-01)
Multiple-input multiple-output (MIMO) is an existing technique that can significantly increase throughput of the system by employing multiple antennas at the transmitter and the receiver. Realizing maximum benefit from ...
• GPU-based Acceleration of Symbol Timng Recovery ﻿

(2012-12-20)
This paper presents a novel implementation of graphics processing unit (GPU) based symbol timing recovery using polyphase interpolators to detect symbol timing error. Symbol timing recovery is a compute intensive procedure ...