Now showing items 98-117 of 597

• #### Cache management in scalable network servers ﻿

(2000)
For many users, the perceived speed of computing is increasingly dependent on the performance of network server systems, underscoring the need for high performance servers. Cost-effective scalable network servers can be ...
• #### Capacity of low power multiuser systems with antenna arrays ﻿

(2005)
In this thesis, we study wireless multiuser communication systems in the regime of low spectral efficiencies, where users and the multiple access point are equipped with antenna arrays. Our first contribution is to develop ...
• #### Channel equalization algorithms for MIMO downlink and ASIP architectures ﻿

(2004)
Processors for mobile handsets in 3G cellular systems require: high speed, flexibility and low power dissipation. While computationally efficient, ASIC processors are often not flexible enough to support necessary variations ...
• #### Channel estimation for code division multiple access communication systems ﻿

(1994)
We consider the estimation of channel parameters for code division multiple access (CDMA) communication systems operating over channels with either single or multiple propagation paths. We present two approaches for ...
• #### Characterization of block memory operations ﻿

(2006)
Block memory operations are frequently performed by the operating system and consume an increasing fraction of kernel execution time. These operations include memory copies, page zeroing, interprocess communication, and ...
• #### Charge Transport and Transfer at the Nanoscale Between Metals and Novel Conjugated Materials ﻿

(2012-09-05)
Abstract Organic semiconductors (OSCs) and graphene are two classes of conjugated materials that hold promise to create flexible electronic displays, high speed transistors, and low-cost solar cells. Crucial to understanding ...
• #### Classification Techniques for Undersampled Electromyography and Electrocardiography ﻿

(2012-10-01)
Electrophysiological signals including electrocardiography (ECG) and electromyography (EMG) are widely used in clinical environments for monitoring of patients and for diagnosis of conditions including cardiac and neuromuscular ...
• #### Client Beamforming for Rate Scalability of MU-MIMO Networks ﻿

(2015-04-24)
The multi-user MIMO (MU-MIMO) technology allows an AP with multiple antennas to simultaneously serve multiple clients to improve the network capacity. To achieve this, the AP leverages zero-forcing beamforming (ZFBF) to ...
• #### Clinical Applications of a Human Cardiovascular-Respiratory System Model: Studying Ventricular Mechanics in Disease and Treatment ﻿

(2012)
Large-scale modeling allows for a broad mechanistic view of a cardiopulmonary disease, often beyond what can be observed clinically. Our group has developed a large-scale model of the human cardiovascular-respiratory system ...
• #### Code design and multiuser detection for code division multiple access systems with continuous phase modulation ﻿

(1996)
The proliferation of wireless communications services combined with the limited spectrum availability have placed the bandwidth utilization as a major performance measure. Consequently, the bandwidth allocation technique ...
• #### Code design for multiple-antenna systems ﻿

(2001)
We propose a systematic method for the design of space-time codes for AWGN slowly and fast Rayleigh fading channels. This can be accomplished by adopting a concatenated space-time code structure, where an orthogonal transmit ...
• #### Code design for the relay channel ﻿

(2007)
The design of wireless communication networks is based on the premise that networks are collections of reliable point-to-point links between communicating nodes. Such a communication model, although simple, is inefficient ...
• #### Coding for Phase Change Memory Performance Optimization ﻿

(2012-09-05)
Over the past several decades, memory technologies have exploited continual scaling of CMOS to drastically improve performance and cost. Unfortunately, charge-based memories become unreliable beyond 20 nm feature sizes. ...

(2001)
A fixed bandwidth expansion can be achieved either by coding or spreading, while each have different effect on the resultant signal space. Coding increases both Shannon and Fourier bandwidth whereas spreading only increases ...
• #### Coherent multiscale image processing using quaternion wavelets ﻿

(2006)
This thesis develops a quaternion wavelet transform (QWT) as a new multiscale analysis tool for geometric image features. The QWT is a near shift-invariant tight frame representation whose coefficients sport a magnitude ...
• #### Comparison of laser-produced plasma target materials for pumping the 109 nm xenon(2+) Auger laser ﻿

(1995)
Short wavelength lasers have many potential applications in scientific and engineering fields. The goal of this research was to improve the output energy of the Xe$\sp{2+}$ 109 nm laser. We compared cadmium, copper, gold, ...
• #### Complexed Multifunctional Metallic and Chalcogenide Nanostructures as Theranostic Agents ﻿

(2013-12-03)
Nanostructures have attracted substantial attention due to their distinctive properties and various applications. Nanostructures consisting of multiple morphologies and/or materials have recently become the focus of intense ...
• #### Component-based adaptation for mobile computing ﻿

(2002)
Component-based adaptation is a novel approach for adapting applications to the limited availability of resources such as bandwidth and power in mobile environments. Component-based adaptation works by calling on the ...
• #### Compressed Sensing for Imaging Applications ﻿

(2008)
Compressed sensing is a new sampling theory which allows reconstructing signals using sub-Nyquist measurements. This can significantly reduce the computation re­quired for both image and video whether during acquisition ...
• #### Compressive sensing for signal ensembles ﻿

(2010)
Compressive sensing (CS) is a new approach to simultaneous sensing and compression that enables a potentially large reduction in the sampling and computation costs for acquisition of signals having a sparse or compressible ...