Now showing items 844-863 of 1884

• #### INVESTIGATION OF LITHIUM - NIOBIUM TRIOXIDE THIN FILMS IN MIS STRUCTURE (FERROELECTRIC) ﻿

(1986)
Thin film LiNbO(,3) was deposited on silicon substrates by using r.f. sputtering techniques under different conditions. A set of films was deposited with different substrate temperatures and with different gas mixtures ...
• #### Investigation of Reliability of Hydraulic Robots for Hazardous Environments Using Analytic Redundancy ﻿

(1999-01-01)
The Rosie mobile worksystem is a robot that is on the cutting edge of hazardous environment robotics. It is a heavy-duty hydraulic robot designed for nuclear reactor decontamination and dismantlement. The robot consists ...

(1972)
• #### Investigations in improving image visualization and quality in positron emission tomography/computed tomography (PET/CT) imaging ﻿

(2010)
Positron Emission Tomography/Computed Tomography (PET/CT) is a widely used imaging modality for managing patients with cancer. The combination of PET and CT can provide both functional and anatomic information of disease ...
• #### IO-lite: A copy-free UNIX I/O system ﻿

(1997)
Memory copy speed is known to be a significant barrier to high-speed communication. We perform an analysis of the requirements for a copy-free buffer system, develop an implementation-independent applications programming ...
• #### Ionization of Rydberg atoms by half-cycle pulses: Effect of pulse shape and rise time ﻿

(1998)
The ionization of potassium np Rydberg atoms with $n\sim388$ by pulsed unidirectional electric fields, termed half-cycle pulses (HCPs), with various well-characterized shapes (rectangular, triangular, and sawtooth) and ...
• #### Isolating the Performance Impacts of Network Interface Cards through Microbenchmarks ﻿

(2004-06-01)
This paper studies the impact of network interface cards (NICs) on network server performance, testing six different Gigabit Ethernet NICs. Even with all other hardware and software configurations unchanged, a network ...
• #### Issues related to data mining with self organizing maps ﻿

(2004)
This thesis demonstrates that the clustering by Kohonen's Self-Organizing Map algorithm (KSOM) can be significantly improved by magnification control. As a second contribution, the thesis proposes a fully automated technique ...
• #### Iterative design of l(p) digital filters ﻿

(2008)
The design of digital filters is a fundamental process in the context of digital signal processing. Being essential building blocks, digital filters are used in diverse areas ranging from medical imaging or audio and video ...
• #### Iterative Multiuser Detection and Decoding ﻿

(1998-11-20)
An iterative detection and decoding algorithm is explored for a convolutionally coded DS-CDMA system. The optimum decoding strategy is to consider the trellises of all the users simultaneously, but this has exponential ...
• #### Iterative Temporal Motion Planning for Hybrid Systems in Partially Unknown Environments ﻿

(2013)
This paper considers the problem of motion planning for a hybrid robotic system with complex and nonlinear dynamics in a partially unknown environment given a temporal logic specification. We employ a multi-layered ...

(1972)
• #### Jacobi-like Matrix Factorizations with CORDIC-based Inexact Diagonalizations ﻿

(1994-06-20)
We propose a CORDIC-based Jacobi-like method for parallel computation of the eigenvalues of Hermitian (and real symmetric) matrices and the SVD of real matrices using inexact diagonalizations. It is predicted on the fact ...
• #### Joint Compression and Speckle Reduction of SAR Images using Embedded Zerotree Models ﻿

(1996-03-01)
We propose a new method for speckle reduction in synthetic aperture radar (SAR) imagery based on the embedded zerotree image compression algorithm. This new approach to denoising is inspired by the realization that the ...
• #### Joint Detection Strategies for Orthogonal Frequency Division Multiplexing ﻿

(2000-04-20)
Traditional OFDM implementations use conventional Fourier filters for data modulation, via the IFFT operation. Much research suggests wavelet based OFDM provides performance gains, due to superior spectral containment ...
• #### Joint detection strategies for orthogonal frequency division multiplexing ﻿

(2000)
Traditional OFDM implementations use conventional Fourier filters for data modulation, via the IFFT operation. Much research suggests wavelet based OFDM provides performance gains, due to superior spectral containment ...
• #### Joint Distributions for Arbitrary Variables ﻿

(1994-10-01)
We compare the methods of Cohen (1971) and of Baraniuk and Jones (see Proc. IEEE ICASSP-93, p.320-323, 1993) for obtaining joint distributions for arbitrary variables. We show that the two methods produce identical results ...
• #### Joint Distributions of Arbitrary Variables Made Easy ﻿

(1996-09-01)
The successful application of joint time-frequency distributions to problems in time-varying spectral analysis has stimulated considerable interest in distributions of other variables for use when a strict time-frequency ...
• #### Joint Distributions of Arbitrary Variables Made Easy ﻿

(1998-09-01)
The successful application of joint time-frequency distributions to problems in time-varying spectral analysis has stimulated considerable interest in distributions of other variables for use when a strict time-frequency ...
• #### Joint Distributions of Arbitrary Variables Made Easy ﻿

(1998-10-01)
In this paper, we propose a simple framework for studying certain distributions of variables beyond time-frequency and time-scale. When applicable, our results turn the theory of joint distributions of arbitrary variables ...