Now showing items 452-471 of 597

• #### Random observations on random observations: Sparse signal acquisition and processing ﻿

(2010)
In recent years, signal processing has come under mounting pressure to accommodate the increasingly high-dimensional raw data generated by modern sensing systems. Despite extraordinary advances in computational power, ...
• #### Rapid prototyping of wireless communications systems ﻿

(2002)
This thesis introduces rapid prototyping methodology which overcomes important barriers in the design and implementation of digital signal processing (DSP) algorithms and systems on embedded hardware platforms, such as ...
• #### Rare gas alkali ionic excimers ﻿

(1989)
The rare gas alkali ionic excimers (RgA)$\sp+$ are investigated as possible VUV laser sources. The detection of emission from (XeRb)$\sp+$ at 165 nm using laser produced plasma soft x-ray excitation is reported. In addition ...
• #### Rate-distortion optimized packet scheduling for video streaming ﻿

(2006)
Internet video streaming places new demands on source coding and network transport algorithms. The challenge is to deliver compressed video packets before their play-out deadline, despite of varying throughput, packet ...

(1970)
• #### REAL-TIME RECONSTRUCTION AND NOISE PERFORMANCE FOR A TIME-OF-FLIGHT POSITRON EMISSION TOMOGRAPHY SYSTEM ﻿

(1982)
Several researchers have proven the benefits of using time-of-flight data in Positron Emission Tomography (TOFPET). Related areas which are investigated here are: (1) The mathematical description of the measurement and ...
• #### Realizing Ultra Energy-efficient Hardware Systems through Inexact Computing ﻿

(2014-04-25)
In this dissertation, novel methodologies for designing energy-efficient hardware systems that deliver just "good-enough" results are proposed by leveraging the principles of inexact computing, wherein perceptually- or ...
• #### Reconfigurable heterogeneous DSP/FPGA based embedded architectures for numerically intensive computing workloads ﻿

(2007)
Telecommunications and multimedia form a vast segment of the embedded systems market. Variations in standards coupled with the desire for software programmability often result in software based implementations executing ...
• #### RECONSTRUCTION OF SIGNALS FROM PHASE: EFFICIENT ALGORITHMS, SEGMENTATION, AND GENERALIZATIONS ﻿

(1982)
It is well known that the phase of the Fourier transform of a signal contains a significant amount of information about the signal. Under certain circumstances the knowledge of phase is sufficient to recover the original ...
• #### REDUCED BANDWIDTH DELTA NETWORKS ﻿

(1987)
As multiprocessor architectures become more prevalent, understanding the performance of interconnection networks becomes more critical. Because the cost of these networks is high, it is desirable to use the least sophisticated ...
• #### Reduced exchange coupling in perpendicular multilayers ﻿

(1997)
The ideal magnetic switching mechanism for magnetic recording is isolated domain coherent rotation. However, in typical Pd/Co and Pt/Co multilayers with high coercivity, the dominant switching mechanism is domain wall ...
• #### Reducing dynamic power consumption in next generation DS-CDMA mobile communication receivers ﻿

(2003)
Reduction of the power consumption in portable wireless receivers is an important consideration for next-generation cellular systems specified by standards such as the UMTS, IMT2000. This thesis explores the design-space ...
• #### Regime Change: Sampling Rate vs. Bit-Depth in Compressive Sensing ﻿

(2012)
The compressive sensing (CS) framework aims to ease the burden on analog-to-digital converters (ADCs) by exploiting inherent structure in natural and man-made signals. It has been demonstrated that structured signals can ...
• #### Resistive switching in silicon oxide-based systems ﻿

(2010)
Voltage-controlled resistive switching in various gap systems on SiO2 substrates is demonstrated. The nanosized gaps are made by several means using different materials including metals, semiconductors and amorphous carbon. ...
• #### Resistor networks and optimal grids for the numerical solution of electrical impedance tomography with partial boundary measurements ﻿

(2010)
The problem of Electrical Impedance Tomography (EIT) with partial boundary measurements is to determine the electric conductivity inside a body from the simultaneous measurements of direct currents and voltages on a subset ...
• #### Resource allocation in wireless CDMA multimedia networks ﻿

(1999)
In this thesis we developed a resource allocation framework for wireless code division multiple access (CDMA) networks that support multi-class traffic with different data rates and bit error rate requirements. We proposed ...
• #### Respiratory motion correction techniques in positron emission tomography/computed tomography (PET/CT) imaging ﻿

(2010)
The aim of this thesis is to design, implement, and evaluate respiratory motion correction techniques that can overcome respiratory motion artifacts in PET/CT imaging. The thesis is composed of three main sections. The ...
• #### RESTORATION AND FUNCTIONAL ANALYSIS OF NUCLEAR MEDICINE IMAGES ﻿

(1982)
The nuclear medicine physician uses visual interpretation of a movie-like display of the beating human heart to detect wall motion abnormalities which might be related to impaired cardiac function. The present work is ...
• #### Rethinking Image Compression for the Object Detection Task ﻿

(2015-12-03)
Traditionally, image compression algorithms, such as JPEG, have been designed for human viewers' satisfaction. Increasingly however, more and more images are being viewed by computers, for performing computer vision tasks ...
• #### Reward Scheduling for QoS in Cloud Applications ﻿

(2012-09-05)
The growing popularity of multi-tenant, cloud-based computing platforms is increasing interest in resource allocation models that permit flexible sharing of the underlying infrastructure. This thesis introduces a novel ...