Now showing items 690-709 of 1907

• #### 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 ...
• #### GR-FET application for high-frequency detection device ﻿

(2013)
A small forbidden gap matched to low-energy photons (meV) and a quasi-Dirac electron system are both definitive characteristics of bilayer graphene (GR) that has gained it considerable interest in realizing a broadly ...
• #### Gradient Estimation for Sensitivity Analysis and Adaptive Multiuse Interface Rejection in Code-division Multiple-access Systems ﻿

(1997-07-20)
In this paper, we consider a direct-sequence code-division multiple-access (DS-CDMA) system in the framework of a discrete-event dynamic system (DEDS) in order to optimize the system performance. Based on this formulation, ...
• #### Gradient estimation for stochastic optimization of optical code-division multiple-access systems. II. Adaptive detection ﻿

(1997-05-20)
For pt.I see ibid., vol.15, no.4, p.731-41 (1997). We develop infinitesimal perturbation analysis (IPA)-based stochastic gradient algorithms for deriving optimum detectors with the average probability of bit error being ...
• #### Gradient Estimation for Stochastic Optimization of Optical Code-Division Multiple-Access Systems: Part I -- Generalized Sensitivity Analysis ﻿

(1997-05-20)
For optimizing the performance of optical code-division multiple-access (CDMA) systems, there is a need for determining the sensitivity of the bit-error rate (BER) of the system to various system parameters. Asymptotic ...
• #### Graphene Ambipolar Multiplier Phase Detector ﻿

(2011-10)
We report the experimental demonstration of a multiplier phase detector implemented with a single top-gated graphene transistor. Ambipolar current conduction in graphene transistors enables simplification of the design ...
• #### Graphene Photonic Devices for Terahertz and Mid-Infrared ﻿

(2013-11-08)
Graphene and other strictly two-dimensional materials are the rising stars on the horizon of material science, condensed matter physics and engineering. The richness of optical and electronic properties of graphene attract ...
• #### Half-Duplex Estimate-and-Forward Relaying: Bounds and Code Design ﻿

(2006-07-01)
We propose a coding scheme for half-duplex estimate-and-forward relaying. Our first contribution is to present an achievable rate for the estimate-and-forward protocol. We also derive the achievable rate for the special ...