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A 2-Digit Multidimensional Logarithmic Number System Filterbank Processor For A Digital Hearing Aid., Hongbo (Jennifer). Li
A 2-Digit Multidimensional Logarithmic Number System Filterbank Processor For A Digital Hearing Aid., Hongbo (Jennifer). Li
Electronic Theses and Dissertations
This thesis addresses the design, implementation, and evaluation of a filterbank for digital hearing aids using a Multidimensional Logarithmic Number System (MDLNS). Hearing loss is a function of both frequency and input level. In a typical digital hearing instrument, the hearing loss compensation is performed by separating the incoming sound into several frequency bands which are then compressed to allow the amplification of low level signals while maintaining the amplitude of high level signals. The demands of low power consumption and small size have led to a number of advances in algorithms, semiconductor technologies and system architectures for completely-in-canal (CIC) …
A Biomechanical Model Of The Spine To Predict Trunk Muscle Forces: Optimizing The Relationship Between Spinal Stability And Spinal Loading., Stephen Hadley Morgan Brown
A Biomechanical Model Of The Spine To Predict Trunk Muscle Forces: Optimizing The Relationship Between Spinal Stability And Spinal Loading., Stephen Hadley Morgan Brown
Electronic Theses and Dissertations
The purpose of this study was to develop an optimization model of the spine that, incorporating a measure of spinal stability as a constraint, allowed for realistic predictions of trunk muscle and spine compression forces. A 3-dimensional, 52 muscle, single joint model of the lumbar spine was developed and tested in situations of pure trunk flexor and lateral bend moments. Spinal stability, about each anatomical axis, was calculated at the L4/L5 spinal joint. Estimates of the optimal level of spinal stability, in a given loading situation, obtained through the use of regression equations developed from experimental findings, were utilized as …
Affective, Cognitive, And Performance Consequences Of Self-Selected Self-Handicaps., Kelly Theresa. Powell
Affective, Cognitive, And Performance Consequences Of Self-Selected Self-Handicaps., Kelly Theresa. Powell
Electronic Theses and Dissertations
Self-handicapping is defined as the construction of obstacles or impediments to successful performance by an individual to protect or enhance self-esteem or self-image. The purpose of this research study was to explore the consequences of engaging in a behavioral self-handicapping strategy. In addition to positive and negative affect, test performance, test performance attributions, and self-efficacy were measured. Self-esteem and tendency to self-handicap served as covariates. Self-selected handicaps were examined in a quasi-experimental design. Participants chose whether to self-handicap or not by selecting either perceived distracting or enhancing music. Participants completed pre-test measures of positive affect, negative affect, self-esteem, and tendency …
Authorization-Enhanced Security Framework For Ogsa Support., Haiyan. Cheng
Authorization-Enhanced Security Framework For Ogsa Support., Haiyan. Cheng
Electronic Theses and Dissertations
Security plays an important role for a large distributed system in an open community. Without enough knowledge about the user, it is hard to make access decision to the local resources. Current Public Key Infrastructure (PKI) uses a trusted third party, called Certificate Authority (CA), to check the identity of the users. The assumption of PKI is that every entity trusts CA absolutely and equally. This is also a weakness of PKI. The security problem in a Single-Sign-On (SSO) environment is more difficult to manage. Most of the current SSO security approach relies heavily on the pre-established trust relationship. This …
Body Image And Exercise: The Role Of Eating Pathology, Internalization, And Self-Efficacy., Kelty L. Berardi
Body Image And Exercise: The Role Of Eating Pathology, Internalization, And Self-Efficacy., Kelty L. Berardi
Electronic Theses and Dissertations
Body image dissatisfaction has been demonstrated to predict engagement in a variety of health-related activities, including exercise. However, not all individuals who are dissatisfied with their bodies engage in exercise. The purpose of the study was to examine how body image dissatisfaction interacts with specific variables to influence exercise behaviour. These variables were eating pathology, internalization of social standards of attractiveness, and self-efficacy related to exercise. Participants included 194 female undergraduate students who completed a questionnaire assessing exercise participation, the Body Image Ideals Questionnaire (BIQ), the Revised Restraint Scale (RRS), the Sociocultural Attitudes Towards Appearance Questionnaire (SATAQ), and the Exercise …
Characterization Of A Novel Human Cap2 Interacting Protein: Neuronal Calcium Binding Protein 1 (Necab1)., Emilio P. Mottillo
Characterization Of A Novel Human Cap2 Interacting Protein: Neuronal Calcium Binding Protein 1 (Necab1)., Emilio P. Mottillo
Electronic Theses and Dissertations
The actin cytoskeleton is implicated in numerous processes such as cellular division, migration, endocytosislexocytosis, and more recently synaptic plasticity. Important players in controlling cytoskeletal rearrangements are the Cyclase Associated Proteins (CAPs) which are thought to link cell signalling to the dynamics of the actin cytoskeleton, via sequestration of monomeric actin subunits. CAPs are conserved throughout evolution and possess conserved functional domains. Previous studies have suggested a link between CAP proteins and vesicle trafficking and this study focussed on characterizing binding partners of human CAPs. Using a two hybrid screen of a human adult brain cDNA library, a novel human CAP …
Combustion Of Propane-Air Mixtures With Oxygenated Additives In A Closed Duct And An Si Engine., Stephen W. Mckellar
Combustion Of Propane-Air Mixtures With Oxygenated Additives In A Closed Duct And An Si Engine., Stephen W. Mckellar
Electronic Theses and Dissertations
This master's thesis outlines the project investigating the effects of oxygenated fuel additives on flame propagation and engine performance. In the first of this two-part investigation, flame speeds, in a straight duct with a curved end section, were examined. The 172 cm straight section was followed by a 90° bend section and a 30 cm straight section. With propane as the fuel and emission zero air as the oxidizer, flame speeds, using equivalence ratios of 0.8, 1.0, and 1.1, were explored. In addition, a commercial propane fuel additive blend was introduced and its flame speed compared to instrument grade propane. …
Document Analysis Using Image Processing Techniques., Yi. Lin
Document Analysis Using Image Processing Techniques., Yi. Lin
Electronic Theses and Dissertations
Image thresholding and page segmentation are necessary components of any image understanding and recognition system. In order for an OCR to function properly, texts in a document image has to be isolated and then fed to the OCR for recognition. This requires development of a robust and accurate page segmentation technique. In any page segmentation technique, a preprocessing step in terms of image restoration and thresholding is needed. This thesis therefore concentrates on the development of efficient and robust image thresholding and page segmentation algorithms. In this thesis, three efficient contrast enhancement techniques are proposed that in conjunction with the …
A Systems Analysis And Design Approach For Modelling Of Participatory Manufacturing Systems., Ruth Jill. Urbanic
A Systems Analysis And Design Approach For Modelling Of Participatory Manufacturing Systems., Ruth Jill. Urbanic
Electronic Theses and Dissertations
The goal of this research was aimed at understanding the effects of human worker attributes within the manufacturing system environment; hence, a model is needed to provide insights into the sensitivities of a manufacturing system. To this end, a framework has been developed which is valid for different perspectives and environments. A matrix methodology has been created that assesses the three levels of manufacturing complexity: product complexity to process complexity and operational complexity. The systematic approach has lead to the development of an objective measure of complexity, which can be used to "mathematically" show tradeoffs at each level. A model …
Salary Determination In The National Hockey League: The Development Of An Equitable Player Compensation Model., Jess Charles. Dixon
Salary Determination In The National Hockey League: The Development Of An Equitable Player Compensation Model., Jess Charles. Dixon
Electronic Theses and Dissertations
Nowhere else in North America is the performance of an employee so readily visible and so easily measured than in the sport of professional ice hockey (Banister, 1997). "Although the performance of professional athletes may be objectively measured and compared by the vast quantities of statistics compiled by sports analysts, controversy still surrounds whether their individual efforts justify their salaries" (Banister, 1997, p. 47). NHL salaries have become so disparate in recent years that it is quite common for certain 'marquee' players to earn 10--20 times the salary of other players competing on the same team (Banister, 1997). With 50% …
Photoblur (Original Writing, Novel)., John Sigurd. Gudmundson
Photoblur (Original Writing, Novel)., John Sigurd. Gudmundson
Electronic Theses and Dissertations
The idea that context shapes text is traceable to Aristotle who identified poetry or "making" with the form or plot that best appeals to audience expectations. Today's complex world, with its host of competing truths, requires texts that reflect this confusion. My novel reacts to this context, appealing to expectations in both form and story. What are those expectations? The current appetite for shorter texts and the popularity of the short novel might be explained by a growing alliterate population, an educated group who value books, but who have little time to read them. Yet reading hasn't declined altogether. Current …
Piles Embedded In Soft Clay Located Below The Water Table Subjected To Lateral Cyclic Loadings: Sensitivity Analysis., Deni Gunawan. Priyanto Putro
Piles Embedded In Soft Clay Located Below The Water Table Subjected To Lateral Cyclic Loadings: Sensitivity Analysis., Deni Gunawan. Priyanto Putro
Electronic Theses and Dissertations
This study presents the theoretical formulation and numerical investigations of sensitivity analysis of laterally loaded piles embedded in soft clay located below the water table. Single piles with various lengths and boundaries subjected to cyclic lateral forces and bending moments are analyzed. The groups of 3 x 3 piles with various spacing (2D, 3D, 4D, and 5D) are also analyzed in this study. For single piles, the pile structure is considered as one-dimensional beam and the supporting soft clay is defined by means of p-y model. For groups of piles, the pile members are considered as one-dimensional beams and the …
Preservice Teacher Beliefs Related To Internet Usage., Salah. Zogheib
Preservice Teacher Beliefs Related To Internet Usage., Salah. Zogheib
Electronic Theses and Dissertations
The study investigated the relationship between preservice teachers' attitudes, achievement-, and value-related motivational beliefs about the Internet and their perceived likelihood to use it in instruction. Attitudes investigated preservice teachers' confidence and liking of the Internet. Achievement-related beliefs were examined within a motivational framework that described preservice teachers' actual knowledge and perceived experience about the Internet. Value-related beliefs were constructed from six measures for which the Internet would be valuable: personal needs, future career goals, a partner, children, future students, and society in general. Likelihood of using the Internet in instruction focused on teaching needs, students' learning, and differential access …
A Geostatistical And Geographic Information Systems Study Of Grainsize Characteristics From Accreting And Eroding Beaches Along The Guyana Coast., Kazi. Arifuzzaman
A Geostatistical And Geographic Information Systems Study Of Grainsize Characteristics From Accreting And Eroding Beaches Along The Guyana Coast., Kazi. Arifuzzaman
Electronic Theses and Dissertations
Spatio-temporal difference of grain size distribution at accreting and eroding beaches along the Guyana Coast has been established in this study. Geostatistical techniques of discriminant analysis, two-way analysis of variance and one-way analysis of variance were utilized to obtain the statistical significance of size variation across the beach and between the beaches. The results of discriminant analyses indicate that there is a statistically significant variation of grain size across the beach and between the two beaches. Two way analyses of variance indicate that size is the most significant factor in contributing this variation and one-way analyses of variance indicate that …
A Parametric Investigation Into The Effect Of The Dish Depth And Spoke Angle On The Crashworthiness Characteristic Of A Four-Spoke Steering Wheel Armature., Ophelia. Nabeta
Electronic Theses and Dissertations
This thesis investigates the effect of geometric variations on the crashworthiness performance of new steering wheels. Experimental tests were carried out on steering wheel armatures from popular 1996--2001 compact vehicles. The armatures were subjected to impact loading using a drop tower testing device in which a 57 kg rigid plate impacted a steering wheel with a velocity of 3.2 m/s. The purpose of the experimental tests was to investigate the crashworthiness characteristics of steering wheel armatures from a similar vehicle line in terms of peak loads, Crush Force Efficiency, elastic response, energy efficiency, specific energy absorption and the Energy Absorption …
Chemical, Biochemical, And Cellular Aspects Of S-Nitrosothiols., Shirin. Akhter
Chemical, Biochemical, And Cellular Aspects Of S-Nitrosothiols., Shirin. Akhter
Electronic Theses and Dissertations
Nitric oxide is involved in many physiological processes including vascular control, immune responses and neurotransmission under physiological conditions. Many functions of NO are triggered by the formation of its metabolite, S-nitrosothiol. S-nitrosothiols play an important role in the delivery, storage and transport of NO. In addition, they regulate the activity of a variety of proteins and enzymes. The first part of my study is focused on studying the regulatory role of S-nitrosothiol. In this study, S-nitrosothiols including S-nitrosoglutathione (GSNO) have been demonstrated to regulate the activity of a key protein in plasma, fibrinogen, without chemically modifying it. GSNO and a …
The Construction Of Ecstasy As A Social Problem In Toronto Newspapers (Ontario)., Sean Cristin. Miller
The Construction Of Ecstasy As A Social Problem In Toronto Newspapers (Ontario)., Sean Cristin. Miller
Electronic Theses and Dissertations
Since the early 1990's there has been a considerable amount of attention given to ecstasy and raves in Toronto. This study examines newspaper coverage of ecstasy through a content analysis of all articles about ecstasy appearing in the Toronto Star, Globe and Mail and National Post from 1988 to 2002. Using a "contextual" constructionist perspective, claims-making activities of various individuals and/or groups is examined. Claims are contrasted with "objective evidence" to illustrate their constructed nature. It is concluded that ecstasy use in Toronto is not the "social problem" it is made out to be in newspaper accounts. A short discussion …
The Difference In Vocabulary Acquisition For Grade One Students Using Shared Reading Or Guided Reading., Brenda Jean. Plowman
The Difference In Vocabulary Acquisition For Grade One Students Using Shared Reading Or Guided Reading., Brenda Jean. Plowman
Electronic Theses and Dissertations
This study examined two different reading methods used in the Ontario public elementary system, shared and guided reading, and their possible effects on students' vocabulary acquisition. Both methods of instruction are supported by the Ministry of Education and are required teaching by primary educators within the Greater Essex County District School Board. The sample consisted of 47 grade one children aged 6 to 7 years of age. All of the subjects attended an Essex County public school. The children were pretested and post tested by the researcher using the same instrument to determine whether an increase in vocabulary acquisition had …
The Effect Of Turbulence On Forced Convection From A Heated Horizontal Circular Cylinder., Christopher. Sak
The Effect Of Turbulence On Forced Convection From A Heated Horizontal Circular Cylinder., Christopher. Sak
Electronic Theses and Dissertations
The effects of free stream turbulence integral length scale and turbulence intensity (root-mean-square stream-wise component of velocity fluctuation) on the rate of forced convective heat transfer from a heated horizontal circular cylinder in a cross flow of air were investigated experimentally. An internally heated 5.1 cm (2&inches;) diameter aluminium cylinder was placed horizontally in an 86 cm wide by 66 cm high (34&inches; by 26&inches;) wind tunnel. The power supplied by the internally embedded heater was kept constant in order to maintain uniform surface temperature. A perforated plate was placed at the entrance to the test section to generate the …
Two-Dimensional Measurements Of Dynamic Cumulative Spine Loading In Real-Time., Michael James. Agnew
Two-Dimensional Measurements Of Dynamic Cumulative Spine Loading In Real-Time., Michael James. Agnew
Electronic Theses and Dissertations
The purpose of this study was to develop a real time method for documenting the cumulative low back loads present in lifting tasks using a simplified regression based biomechanical model. Following model development, custom software was created and used with an electromagnetic tracking device (Fastrak(TM)) to calculate cumulative loads in real-time. Estimates obtained from the real-time method (cumulative joint compression, anterior joint shear, posterior joint shear) were compared to estimates from a dynamic link segment biomechanical model (GOBER). Estimates obtained by the real-time method were statistically different than the dynamic biomechanical model in estimates of cumulative compression and cumulative anterior …
Unhcr And The Politics Of Refugee Repatriation., Melaku T. Awoke
Unhcr And The Politics Of Refugee Repatriation., Melaku T. Awoke
Electronic Theses and Dissertations
This thesis critically examines the politics of refugee repatriation. Informed by a conceptual framework that draws on the concepts of "risk" (Beck 1992) and "governance" Rose (1999), the thesis investigates the United Nations High Commissioner for Refugees (UNHCR's) risk and governing discourses. It problematizes and rejects UNHCR's treatment of refugees "as a security risk" as well as its governing discourses and practices of "repatriation" and "containment". It advances a new perspective for understanding the politics of refugee repatriation and the governing dimensions associated with such politics.Dept. of Sociology and Anthropology. Paper copy at Leddy Library: Theses & Major Papers - …
Muta Poesis., Kay Byrne
Muta Poesis., Kay Byrne
Electronic Theses and Dissertations
This paper is produced to support my thesis show Muta Poesis. I have over the last two years sought through the use of photography to visualize the subject of death. I attempt to capture the emotive aspects of the subject of death, achieving this through the loss of natural daylight which is only apparent within the final photographic print. Within this paper I put forward the research that has become the basis for my studio practice. I explore the subject of death from the Medieval period through to the Victorian period, covering the historical evolution of death imagery and photography. …
Variation Of Bloom Filters Applied In Distributed Query Optimization., Yue (Amber). Zhang
Variation Of Bloom Filters Applied In Distributed Query Optimization., Yue (Amber). Zhang
Electronic Theses and Dissertations
Distributed query processing is important for Distributed Database Systems. Through the past years, the research focus in distributed query processing has been on how to realize join operations with different operators such as semi-join and Bloom Filter. Experiments show that using bloom filters, the hash-semijoin, almost always does better than semi-join for the query processing. However as long as you use bloom filter, you cannot avoid collisions. So in order to get the cheaper processing, some of the past work uses two or more bloom filters to do the hash-semijoin. However several factors still affect the cost and optimization result. …
Wavelet-Based Multiresolution Method For Surface Reconstruction., Shobha. Iyer
Wavelet-Based Multiresolution Method For Surface Reconstruction., Shobha. Iyer
Electronic Theses and Dissertations
One of the areas of research that has achieved tremendous importance over the recent past is the problem of reconstructing a surface of a solid polyhedral object. This problem has found vast applications in human anatomy, automobile design, medical imaging and therapy, etc. One of the foremost techniques used to solve this problem included constructing the solid from a series of slices parallel to each other. This slice data was obtained by taking horizontal cross-sections passing through the interior of the solid like slicing an apple through a number of thin horizontal planes. The piecewise linear interpolation technique was one …
Laboratory Study And Numerical Simulation Of Permanganate Oxidation Of Pooled Tetrachloroethylene., Qunli Dai
Laboratory Study And Numerical Simulation Of Permanganate Oxidation Of Pooled Tetrachloroethylene., Qunli Dai
Electronic Theses and Dissertations
The main objectives of this research are to evaluate MnO2 plugging effects on remedial efficiency of pooled tetrachloroethylene (PCE) using KMnO4 solution under a high pH condition, to develop and test a three-dimensional numerical model, and to validate the model with experimental data. Additional studies conducted to achieve the thesis objectives include kinetic studies of KMnO4 oxidation with PCE at high pH. The kinetic studies of KMnO4 oxidation of PCE were conducted using a sodium carbonate solution (1 g/l, pH = 10.6 +/- 0.1) at three different temperatures (5, 10, and 20°C) and three KMnO4 concentrations (0.2, 1, and 5 …
Metallated Group Ix And Group X Phosphinimine Complexes., Katie Tak-Kwan. Chan
Metallated Group Ix And Group X Phosphinimine Complexes., Katie Tak-Kwan. Chan
Electronic Theses and Dissertations
The focus of this research has been the preparation of late transition metal phosphinimine complexes. The thesis herein describes the synthesis of a series of monomeric Group IX phosphinimine complexes. [RhCOD(o-C 6H4PPh2NR)] (R = 2,6-C6H3(CH 3)2 44, 2,6-C6H3 iPr2 45, 3,5-C6H3(CH 3)2 46 and Ph 47) were prepared via salt metathesis under mild conditions. The analogous complexes [Rh( o-C6H4PPh2NPh)(Ph2PCH 2CH2PPh2)] 52 and [IrCOD( o-C6H4PPh2NPh)] 53 were also readily prepared by similar methods. Reactivity studies were performed on these complexes. Unexpectedly, complexes 46, 47, 52 and 53 underwent oxidative addition of methylene chloride. However, when steric bulk was introduced on the …
Depth Recovery Using A Plenoptic Camera., Mohamed. Amtoun
Depth Recovery Using A Plenoptic Camera., Mohamed. Amtoun
Electronic Theses and Dissertations
Depth recovery is a central problem in Computer Vision. Stereopsis is one of the most extensively investigated techniques amidst the approaches addressing it. Though sufficiently accurate, stereopsis is highly dependent on the success of point correspondence, an ill-posed problem that is known to suffer from a number of underlying difficulties. Single-lens stereo systems emerged recently as an effective means to thwart some of the problems of correspondence. The plenoptic camera in particular, has a special image formation geometry that claims to resolve the correspondence ambiguities and simplify depth recovery. However, to our knowledge, prior to this work, no study has …
Detection Of Cylinder Bore Non-Cleanup Using Modeling Of Piston Ring Dynamics., Matthew. Bitzer
Detection Of Cylinder Bore Non-Cleanup Using Modeling Of Piston Ring Dynamics., Matthew. Bitzer
Electronic Theses and Dissertations
A study was undertaken to develop a method of detecting an automotive engine manufacturing defect known as cylinder bore non-cleanup. This defect is best described as a rough surface finish inside any cylinder bore of an engine. This defect causes increased piston ring wear and engine noise and vibration. Recently published literature on engine vibration analysis and defect detection is presented. Special emphasis was placed on engine dynamic modeling. This study examines the effects of cylinder bore non-cleanup on the motion of the piston rings. This is accomplished by modeling the dynamics of the piston and piston rings using a …
Electron Impact Excitation Studies Of Unstable Atomic Species., Ady Kamel. Abdellatif
Electron Impact Excitation Studies Of Unstable Atomic Species., Ady Kamel. Abdellatif
Electronic Theses and Dissertations
The polarization of Balmer-alpha radiation excited in collisions of electrons with atomic hydrogen is presented for an electron energy range from threshold to 1000 eV. Measurements are in good agreement with calculations carried out using either convergent-close-coupling or R-matrix with pseudo-states approaches. Cascade is demonstrated to have a significant effect. Balmer-alpha excitation function data are also presented. A previous measurement of the polarization of Balmer-alpha following dissociative excitation of H2 by electrons is confirmed and extended. The electron impact excitation spectrum of atomic and molecular nitrogen in the VUV range (800 A--1800 A) is presented. The excitation functions of the …
Energy Absorption And Load Management Characteristics Of Aluminum Foam-Filled Braided Tubes., Christopher Richard. Powell
Energy Absorption And Load Management Characteristics Of Aluminum Foam-Filled Braided Tubes., Christopher Richard. Powell
Electronic Theses and Dissertations
The work in this thesis presents the test results of an energy absorber that functions under tensile loading. Unlike conventional energy absorbing devices that function in compression, the aluminum foam filled braided tube design has the capability of absorbing energy in tension under quasi-static and dynamic loading. A series of quasi-static tests were performed with various aluminum foam densities to understand the relationship between foam density and energy absorption. It was determined from an analysis of the data that a linear relationship exists between foam density and energy absorption per unit volume of aluminum foam. A numerical model was developed …