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2000

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Articles 17581 - 17590 of 17590

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Reconstructing Air, Mathieu Poster Jan 2000

Reconstructing Air, Mathieu Poster

Theses

Not provided.

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Evaluation Of Packaging Materials Under Vacuum For Potential Use As Internal Cushioning For Semiconductor Industry Vacuum Machinery, Andrew Baisch Jan 2000

Evaluation Of Packaging Materials Under Vacuum For Potential Use As Internal Cushioning For Semiconductor Industry Vacuum Machinery, Andrew Baisch

Theses

This study explores a concept for applying basic packaging materials to an environment of high vacuum. This study identified three basic packaging materials and exposed them to a high vacuum environment to identify visual effects caused by the vacuum. In semiconductor and data storage industries, the machinery needed to ultimately create a computer chip often contains vacuum chambers. A common practice of the industry is to ship this machinery while under a state of high vacuum. There are parts inside these vacuum chambers that need protection from the effects of shock and vibration. By placing a sample of packaging material …

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Nonlinear Ultrasound Image Modeling: Development Of A Complete End-To-End Model For Qualitative And Quantitative Analysis Of Medical Ultrasound, Kevin Ayer Jan 2000

Nonlinear Ultrasound Image Modeling: Development Of A Complete End-To-End Model For Qualitative And Quantitative Analysis Of Medical Ultrasound, Kevin Ayer

Theses

Finite amplitude sound propagation undergoes nonlinear distortion due to continuous path interaction with the propagation medium. This distortion tends to defocus the beam causing significant lateral and contrast resolution degradation. Fundamental understanding of this interaction requires development of computational models that accurately predict the nonlinear interaction - development of media-borne harmonics - as well as produce an ultrasound image - introduction of transducer effects, interface transitions, and innovative image processing to extract harmonics. Most computational models of ultrasound propagation assume axial symmetry for computational expediency. Two notable exceptions are the K-Z-K and NLP models. A new endto- end model, NUPROP, …

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Characterization Of The Earth's Surface And Atmosphere For Multispectral And Hyperspectral Thermal Imagery, Erich Hernandez-Baquero Jan 2000

Characterization Of The Earth's Surface And Atmosphere For Multispectral And Hyperspectral Thermal Imagery, Erich Hernandez-Baquero

Theses

The goal of this research was to develop a new approach to solve the inverse problem of thermal remote sensing of the Earth. This problem falls under a large class of inverse problems that are ill-conditioned because there are many more unknowns than observations. The approach is based on a multivariate analysis technique known as Canonical Correlation Analysis (CCA). By collecting two ensembles of observations, it is possible to find the latent dimensionality where the data are maximally correlated. This produces a reduced and orthogonal space where the problem is not ill-conditioned. In this research, CCA was used to extract …

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Mortar Estimates Independent Of Number Of Subdomains, Jay Gopalakrishnan Jan 2000

Mortar Estimates Independent Of Number Of Subdomains, Jay Gopalakrishnan

Mathematics and Statistics Faculty Publications and Presentations

The stability and error estimates for the mortar finite element method are well established. This work examines the dependence of constants in these estimates on shape and number of subdomains. By means of a Poincar´e inequality and some scaling arguments, these estimates are found not to deteriorate with increase in number of subdomains.

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Monaural Cue Sound Localizer, John G. Harris, Chiang Jung Pu, Jose C. Principe Jan 2000

Monaural Cue Sound Localizer, John G. Harris, Chiang Jung Pu, Jose C. Principe

Electrical and Computer Engineering Faculty Research & Creative Works

We describe the first single microphone sound localization system and its inspiration from theories of human monaural sound localization. Reflections and diffractions caused by the external ear (pinna) allow humans to estimate sound source elevations using only one ear. Our single microphone localization model relies on a specially shaped reflecting structure that serves the role of the pinna. Specially designed analog VLSI circuitry uses echo-time processing to localize the sound. A CMOS integrated circuit has been designed, fabricated, and successfully demonstrated on actual sounds.

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Mechanical Supported Adaptable Wing, Cory Pike Jan 2000

Mechanical Supported Adaptable Wing, Cory Pike

Theses

There are several advantages to the incorporation of an adaptable wing on an aircraft. Among these are increased fuel efficiency, greater maneuverability, and an improved ability to negotiate adverse conditions. This thesis explores the concept of a mechanically supported adaptable wing, where the supports are in the form of virtual spars running lengthwise along a wing of uniform cross-section. With no cross-sectional support to the wing, the skin spanning the area between the virtual spars experiences a certain amount of deflection due to the various aerodynamic forces acting on the wing. This thesis develops a process for optimizing (minimizing) the …

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Vibration Field-To-Lab: Impact Of Time Measurement Intervals On Intensity, Frank Magnifico Jr, Jay Gerondale Jan 2000

Vibration Field-To-Lab: Impact Of Time Measurement Intervals On Intensity, Frank Magnifico Jr, Jay Gerondale

Theses

The objective of this study was to determine what impact various time measurement intervals would have on intensity levels in the trucking environment. The study was limited to timer triggered data collection associated with semi trailer vibration. The study then examined the relationship between established wake-up time intervals and the resultant intensities and PSD plots for the same field trip. In order to accomplish this, it was necessary to use multiple recorders. Each recorder was to be set with a specific time trigger threshold for recording data. Two vibration environments were analyzed using Saver vibration recording equipment. One environment was …

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Oculoplastic Surgery, Curtis W. Perone Jan 2000

Oculoplastic Surgery, Curtis W. Perone

Theses

Not Included

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Determination Of Thermal Maturity And Organic Matter Type By Principal Components Analysis Of The Distributions Of Polycyclic Aromatic Compounds, Michael A. Kruge Jan 2000

Determination Of Thermal Maturity And Organic Matter Type By Principal Components Analysis Of The Distributions Of Polycyclic Aromatic Compounds, Michael A. Kruge

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

The thermal maturity and organofacies sensitivity of polycyclic aromatic compound (PAC) distributions was explored by examination of the aromatic fractions of solvent extracts from a diverse set of 53 shales, coals and kerogen macerals which have undergone either natural or artificial maturation and which represent all three principal sedimentary organic matter (OM) types. Systematic changes with maturation were observed in the following groups of isomers: tri- and tetramethylnaphthalenes, methyl- and dimethylphenanthrenes, methyl- and dimethyldibenzothiophenes, methylpyrenes, and methylchrysenes. The maturity differences were quantified by mathematical ratios of the relative concentrations of the more thermally stable isomers to the less stable, on …

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