Physical Sciences and Mathematics Commons^™

A Bootstrap Method To Analyze An Intervention Model With Autoregressive Error Terms, Scott D. Mcknight

Dissertations

The analysis of a particular time-series intervention model involving lag one autoregressive (AR(1)) error terms is the focus of this dissertation. The method of ordinary least squares, and several two stage procedures that are commonly used to analyze this intervention model are examined. The two stage Cochrane-Orcutte, Durbin, and generalized least squares procedures each requires estimation of the AR(1) parameter in stage one before hypothesis testing about the intervention parameters can be performed in stage two. Using Monte Carlo experiments we show that the AR(1) estimates commonly used in these procedures are poor and consequently the stage two hypothesis tests …

The Theory And Applications Of Stratified Graphs, Reza Rashidi

Dissertations

Physical design is one of several stages in the design of a VLSI chip. In this stage, the specifications of an electrical circuit are converted into a geometrical model. Problems concerning the physical design stage can often be studied by means of graphs. The problems encountered here are routing problems and concern placement of vertices, which represent wires, into layers. All this gives rise to a class of graphs whose vertices are partitioned into classes. Such graphs are called stratified graphs. In this dissertation, we formally define stratified graphs, study their properties, and investigate various algorithmic problems related to these …

High Breakdown Rank-Based Estimates For Linear Models, William H. Chang

Dissertations

No abstract provided.

An Office Document Retrieval System With The Capability Of Processing Incomplete And Vague Queries, Qianhong Liu

Dissertations

TEXPROS (TEXt PROcessing System) is an intelligent document processing system. The system is a combination of filing and retrieval systems, which supports storing, classifying, categorizing, retrieving and reproducing documents, as well as extracting, browsing, retrieving and synthesizing information from a variety of documents. This dissertation presents a retrieval system for TEXPROS, which is capable of processing incomplete or vague queries and providing semantically meaningful responses to the users. The design of the retrieval system is highly integrated with various mechanisms for achieving these goals. First, a system catalog including a thesaurus is used to store the knowledge about the database. …

Hydrogeology And Hydrogeochemistry Of Government Marsh, North St. Joseph County, Michigan, Michael C. Kasenow

Dissertations

A hydrogeologic and hydrogeochemical investigation was conducted at Government Marsh located in St. Joseph County, Michigan from May, 1988, to November, 1993. Information on glacial geology, topography, drainage patterns, hydraulic conductivity, vegetation, water chemistry, and static water table elevations has been collected and analyzed. Data were collected in order to determine directions of ground water flow and areas of recharge and discharge. Bail-down tests, grain-size analysis, and permeameters were used to determine hydraulic conductivity adjacent to and within the wetland. Water table elevations and chemistry were analyzed from wells adjacent to the wetland perimeter and within the boundaries of the …

Isospectral Graphs And The Expander Coefficient, Ian Campbell Walters Jr.

Dissertations

The expander coefficient of a graph is a parameter that is utilized to quantify the rate at which information is spread throughout a graph. The eigenvalues of the Lapladan of a graph provide a bound for the expander coefficient of the graph. In this dissertation, we construct many pairs of isospectral graphs with different expander coefficients.

In Chapter I, we define the problem and present some preliminary definitions. We then introduce two constructions that are related to graph composition and that may be employed to produce cospectral and isospectral graphs.

In Chapter II, we investigate the connectivity of and distance …

Comparisons Of Several Medians In A Lognormal K-Sample Context Where Some Data May Be Left-Censored, Stavros Costa Pouloukas

Dissertations

No abstract provided.

A Spectroscopic Study Of Nitrogen, Nitrogen/Helium And Fluorobenzenes In A Corona Supersonic Discharge, Jing-Chen Luo

Dissertations

No abstract provided.

Structural Characterization Of Recombinant Polypeptides Of &-Spectrin, Yirong Xu

Dissertations

No abstract provided.

Lithium Binding To Human Rbc Membranes And Substrates Of Second Messenger Systems, Qinfen Rong

Dissertations

No abstract provided.

Synthesis Of Enantioenriched Piperidine-Based, Spirocyclic Analogues Of Af64a And Acetylcholine, Nam Huh

Dissertations

No abstract provided.

Chiral Isoparathion Methyl As A Stereospecific Probe Of Phosphorothiolate Mechanism Of Action; Novel Synthetic Approaches Toward Isoquinolone Alkaloids: Pancratistatin Study, Seungmin Ryu

Dissertations

No abstract provided.

Development And Functional Properties Of Intramolecular Crosslinked Hemoglobin, Qunyang Zhang

Dissertations

No abstract provided.

Synthesis Of Malathion, Malaoxon, And Isomalathion Enantiomers And Examination Of Their Interactions With Acetylcholinesterase, Clifford E. Berkman

Dissertations

No abstract provided.

Segmental Motions Of Oxidized Human Erythrocyte Spectrin-Actin: A Spin Label Epr Study, Benito O. Kalaw

Dissertations

No abstract provided.

An Investigation Into Clay Intrinsic Properties, Surface Modifications And Applications, G Robert Goss

Dissertations

No abstract provided.