Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1918. / The entire thesis text is included in file. Typescript. Illustrated by author, except for photos. Title from title screen of thesis/dissertation PDF file (viewed May 12, 2009) Includes bibliographical references (p. [iii]-[iv]).

Thesis (M.S.)--Oregon State University, 1979. / Typescript (photocopy). One ill. folded in pocket. Includes bibliographical references. Also available on the World Wide Web.

Thesis--University of Missouri, School of Mines and Metallurgy, 1910. / Typescript. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed March 19, 2009)

Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1907. / J. T. Vitt determined to be John Thomas Vitt and P. A. Philippi determined to be Paul Andrew Philippi from "Forty-First Annual Catalogue. School of Mines and Metallurgy, University of Missouri". The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed )

The results of a laboratory Investigation into the pore pressure characteristics of an extrasensitive marine clay are presented. The soil samples were obtained from the Port Mann area of British Columbia. Experimental work consisted of the performance of long-duration triaxial shear tests with pore-pressure measurements. A stress-controlled triaxial machine equipped with a null-indicating type pore-pressure device was employed for all shear tests. The observed data show that for this soil a slow build-up of pore pressure occurs for both increases in cell pressure and axial stresses in the triaxial test. Even in saturated specimens the slow build-up effect prevailed. The rates of build-up observed for changes in axial stress were slower than those recorded for changes in cell pressure. Measurements at the upper end of some specimens, and at the centre of others, indicated that the pore pressure required more time to reach equilibrium, at the ends of cylindrical specimens. The hypothesis is put forward that the observations can be explained by plastic deformations of the adsorbed layers surrounding the particles. Strength and pore pressure parameters have been obtained for the soil. An automatic control has been developed to assist in the performance of long-duration tests. The apparatus employs the photo-electric effect to control movements of pore water. A detailed description of this device is presented. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

Speech compression is a method of electromyographically reducing the speech signal, resulting in a decrease in the time required for presentation of a message by increasing the number of words per minute. Research in the area of speech compression has to this time been focused on determining the listener response by means of comprehension testing. While comprehension testing uncovers the individual's ability to resolve, organize, and recall a message at accelerated rates, it gives no information about the listener's psychophysical response to compression. Does the individual find listening to compression to be tension-provoking or stressful? Or can a listener accommodate accelerated speech without stress? The purpose of this study was to determine the individual's acceptance of compressed speech. "Acceptability" was operationally defined as finding no significant differences between tension levels produced while listening to normal speech rate as compared to tensions produced while listening to compressed speech rates. Tension levels were determined by an electromyograph which measures the amount of tension within a muscle. The specific hypotheses researched were: Hypothesis 1. Sampled muscular tension levels will differ significantly with Order of Presentation. Hypothesis 2. Sampled muscular tension levels will differ significantly with Rate of Presentation. Hypothesis 3. Sampled muscular tension levels will differ significantly between Males and Females. Hypothesis 4. Sampled muscular tension levels will show significant interaction between Order of Presentation and Rate of Presentation. Hypothesis 5. Sampled muscular tension levels will show significant interaction between Order of Presentation and Sex of the Listener. Hypothesis 6. Sampled muscular tension levels will show significant interaction between Rate of Presentation and Sex of the Listener. Hypothesis 7. Sampled muscular tension levels will show significant interaction among Order of Presentation, Rate of Presentation, and Sex of the Listener. A 6 x 3 x 2 factorial de sign was constructed to examine muscular tension levels. The controlled factors were Order of Presentation, Rate of Presentation, and Sex of Listener. Rate of Presentation included three speech sample s: normal (189 words per minute), speech compressed 25% (252 words per minute), speech compressed 50% (378 words per minute). These rates were arranged into six presentational patterns, composed of the three rates varied by its position within the sequence. Each Order of Presentation was presented to a male and a female listener, resulting in twelve subjects. The dependent variable was muscular tension within the trapezius muscle produced by the listener as he heard the experimental presentation. The sample was selected from speech students enrolled in Fundamentals of Speech at Portland State University. Winter Term, 1970. Apparatus used to collect tension level readings were: bipolar surface electrodes, differential amplifier, oscilloscope, stereo tape recorder, and multi-functioned voltmeter. The muscle tension levels were analyzed statistically by the three -factor analysis of variance test for significance. The finding of no significant differences at the. 05 level of confidence for any of the experimental conditions warranted rejection of the research hypotheses. The conclusion drawn from this finding was that compression within the limits used in this study is an acceptable mode of presentation based on the criterion that tension levels produced by compression differ only by chance from tension produced while listening to normal speech. It seems feasible, therefore, to substitute compression for normal speech in conditions where usage would be desirable.

published_or_final_version / Industrial Engineering / Master / Master of Philosophy

No description available.

Compressed sensing is an emerging field, which proposes that a small collection of linear projections of a sparse signal contains enough information for perfect reconstruction of the signal. In this thesis, we study the general problem of modeling and reconstructing spatially or temporally correlated sparse signals in a distributed scenario. The correlation among signals provides an additional information, which could be captured by joint sparsity models. After modeling the correlation, we propose two different reconstruction algorithms that are able to successfully exploit this additional information. The first algorithm is a very fast greedy algorithm, which is suitable for large scale problems and can exploit spatial correlation. The second algorithm is based on a thresholding algorithm and can exploit both the temporal and spatial correlation. We also generalize the standard joint sparsity model and propose a new model for capturing the correlation in the sensor networks.

Compressed sensing is an emerging field, which proposes that a small collection of linear projections of a sparse signal contains enough information for perfect reconstruction of the signal. In this thesis, we study the general problem of modeling and reconstructing spatially or temporally correlated sparse signals in a distributed scenario. The correlation among signals provides an additional information, which could be captured by joint sparsity models. After modeling the correlation, we propose two different reconstruction algorithms that are able to successfully exploit this additional information. The first algorithm is a very fast greedy algorithm, which is suitable for large scale problems and can exploit spatial correlation. The second algorithm is based on a thresholding algorithm and can exploit both the temporal and spatial correlation. We also generalize the standard joint sparsity model and propose a new model for capturing the correlation in the sensor networks.