Digital Commons Network^™

Experimental Testing And Modeling Of Automotive Automatic Belt Tensioners, Jiaxin Zhao, Clark R. Barker, Larry Oliver, William Breig, Joey Edson

Mining Engineering Faculty Research & Creative Works

Automatic belt tensioners are used in serpentine belt drive systems in many automotive front end accessory drive (FEAD) applications. The dynamic characteristics of the tensioner must be well defined in order to accurately model the entire belt drive system for system simulation studies. In order to determine required tensioner performance parameters, six different configurations of a production unit were tested over a wide range of frequencies at two different amplitudes of the arm travel. Data was recorded to define the total torque generated by the tensioner as a result of the known input motion to which the arm was subjected. …

Frontal Lobe Dysfunction In Non-Clinical Compulsive Checkers, Christopher J. Boys

Dissertations and Theses @ UNI

Recent studies suggest deficits in set-shifting ability, as assessed by tasks such as the Wisconsin Card Sorting Test (WCST), in patients with obsessive-compulsive disorder (OCD). The present study examined the extent to which these deficits were demonstrated by nonclinical "checkers" selected on the basis of scores on the Maudsley Obsessional Compulsive Inventory. A modified version of the WCST was used, the Milwaukee Card Sorting Test (MCST), in order to determine whether the deficits in set-shifting ability are due to a complete lack of switching or to a dysregulation in switching. In the latter case, the individual illustrates correct set shifting …

Cancer Prevention Behavior In Traditional College-Age Individuals, Michelle Renee Hartwig

Dissertations and Theses @ UNI

The purpose of this study was to describe cancer prevention behaviors practiced by traditional college-age individuals enrolled at a four year university. Specifically, the study was designed to determine what primary and secondary prevention behaviors the students were practicing and if there was a difference in prevention behaviors between males and females. Demographic information collected was limited to sex of the participant. The behavioral categories examined included tobacco use, early detection practices, alcohol use, nutrition, physical activity, ultraviolet radiation exposure, and sexual behavior. The distribution of the 210 respondents was almost equal with 102 males and 108 females participating. The …

Low-Cost Videoconferencing For The Clinical Management Of Speech & Language Disorders, Dale Lee Burgess

Dissertations and Theses @ UNI

Videoconferencing allows participants separated by distance to see and hear each other in real time. Traditionally, videoconferencing has been associated with expensive, room-based systems that limit the number of potential users. Recent advances in technology have made it possible to videoconference via desktop computers using inexpensive software programs. This has allowed broader participation in videoconferencing, thus, making it a more affordable means of communication. The purpose of this study was to determine if desktop videoconferencing (DVC) could be used in the clinical management of individuals with communication disorders. One of the potential advantages of DVC over traditional therapy programs is …

Aerosol Particle Scavenging By Fog And Haze Droplets, Josef Podzimek

Physics Faculty Research & Creative Works

Droplet imprints in thin gelatin layers have been used for the investigation of coarse particles embedded in fog (haze) droplets in comparison to interstitial particles. Droplet samples were taken in less polluted regions of Missouri and Illinois and also in more polluted marine-urban environment in Italy. Considerable differences in particle size distribution and particle location inside the droplets have been found in samples collected on four sampling sites. The deduced relationships can be applied for the description of the aerosol scavenging process in fogs. The pollution of fog (haze) droplets may be related to the droplet mean volume radius and …

Utopia In Iowa?: Etienne Cabet And The Icarian Concept Of Progress, John Davis Higdon

Dissertations and Theses @ UNI

Nineteenth century America was a period of transition. Reform movements paralleled and sometimes replaced politics as idealistic people worked for a cornucopia of social causes. Believing man capable of finding a universally correct lifestyle, numerous activists designed communities to guide the world to peace and prosperity. One of these groups, the Icarians, following the teachings of their founder Etienne Cabet, built several utopian hamlets in the United States and existed for over half a century. Their longevity can be primarily accredited to their espousal of the philosophical doctrine of Progress. An examination of the Icarian's history shows that a quasi-religious …

The Social History Of A Moral Vision : A Qualitative Study Of The Ulster Project In Decorah, Iowa, Mark Murray Mccrory

Dissertations and Theses @ UNI

The purpose of this qualitative study was to explore the beliefs, feelings, and experiences of 10 people involved with the Ulster Project in Decorah, Iowa. In addition, the study sought to assess the merits and consequences of the Project and to evaluate the validity of the contact hypothesis. The Ulster Project is a non-profit organization, which sponsors an ecumenical summer visit of Northern Irish youth to the United States. By exposing its visitors to people of the opposite religion, the Project's long range goal is to heal the many scars which have been built up through years of violence and …

Organically Deposited Metallic Films For Device Fabrication, Thomas J. O'Keefe, M. Stroder, Matthew O'Keefe

Materials Science and Engineering Faculty Research & Creative Works

Advances in integrated circuit density, speed and complexity are dependent on lower resistance, finer line width on-chip interconnections. Methods for incorporating copper interconnects into IC fabrication processes have been developed which accomplish this objective but most of these methods use some form of blanket metal deposition that requires mechanical and/or chemical removal of excess material. To date, investigations into the selective deposition of conductor materials for device fabrication have met with limited success. A new process for selectively depositing metallic conductors using inexpensive, organic-based chemical solutions could potentially force a paradigm shift in the deposition of metals for microelectronic applications. …

A Transaction Model For Mobile Computing, Sanjay Kumar Madria, Bharat Bhargava

Computer Science Faculty Research & Creative Works

We introduce a prewrite operation before a write operation in a mobile transaction to improve data availability. A prewrite operation does not update the state of a data object but only makes visible the value that the data object will have after the commit of the transaction. Once the transaction has read all the values and declares all the prewrites, it can precommit at a mobile host. The remaining transaction's execution is shifted to the stationary host. Writes on a database consume both time and resources at the stationary host and are therefore delayed. A pre-committed transaction's prewrite values are …

Optical Digital Fragmentation Measuring Systems -- Inherent Sources Of Error, Norbert H. Maerz, Wei Zhou

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Automated optical imaging systems of measuring fragmentation are increasingly being used in the mining, comminution, and materials handling industries. These methods have been well received in many of the industries involved. Considering that in many of these applications there are no alternative ways of sizing material, having even a rudimentary measurement of size distributions allows evaluations of explosive, blast design, detonator performance, crusher and milling performance, and material degradation due to transport.

Optical methods have inherent limitations, which reflect on accuracy, precision, and reproducibility of measurement results. This stems from the fact that there are myriads of variables, which affect …

Ngoma Memories: A History Of Competitive Music And Dance Performance On The Kenya Coast, Rebecca Gearhart

Scholarship

A dissertation presented to the graduate school of the University of Florida in partial fulfillment of the Requirements for the Degree of Doctor of Philosophy.

An Interlibrary Loan System On The World Wide Web, Schubert Shou Boon Foo, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Inter-Library Loan (ILL) service is one of the services provided by libraries that offers users a way to access library resources beyond their affiliated libraries. Additionally, it allows participating libraries to share and maximize their resources. This work examines the ILL process used by libraries in Singapore and proposes that the existing paper-based manual system be replaced by a Web-based ILL system. Such a Web-based system has been successfully designed and implemented at the Nanyang Technological University. The paper presents an overview of the system requirements and architecture, implementation details and demonstrates the feasibility and advantages of the new system.

Child Sexual Abuse In Ireland: An Historical And Anthropological Note, Kevin Lalor

Articles

Child sexual abuse in Ireland has entered the public domain only in the last twenty years. This process was accelerated by a number of high profile cases which became public in the mid 1990s. Prior to the recent past, few references to child sexual abuse in Ireland exist. The first written evidence is found in the Penitentials of the early Christian period. Penance is specified for those that “misuse” children. Mention of adult child sexual relations is also found in the Brehon law texts. Historians, sociologists and anthropologists of childhood suggest that patterns of child rearing vary across time and …

Toward A Framework Of Mutualism: The Jewish Community In Genetics Research, Karen H. Rothenberg, Amy B. Rutkin

Faculty Scholarship

No abstract provided.

The Changing Nature Of Theory And Practice In Marketing: On The Value Of Synchrony, Aidan O'Driscoll, John Murray

Articles

Any academic discipline with a closely associated area of professional endeavour is profoundly affected by the relationship between its theory and practice. Synchrony in theory and practice adds value to the management of enterprise and to the advance of the discipline. Mindful of this assertion, this article explores the changing nature of theory and practice in marketing. It examines current trends in marketing practice which are occurring as a result of change in markets, technology and organisations. It assesses the state of theory in six subfields of marketing. It also considers developments in closely related management disciplines as well as …

Java, Java, Java, Chaman Sabharwal

Computer Science Faculty Research & Creative Works

Everyone is talking about Java. The driving force for this chatter is Java''s simplicity and potential power. Java is programming language, and a language for the intranet and the World Wide Web (WWW). Java is a Write On one platform and Run on Many platforms (WORM) language. For network-friendly, platform-independent applications, Java (originally Oak) is an object oriented programming language. Java source code is compiled into a virtual machine code or bytecode. This makes the Java platform independent. It can be placed on a Web site, and executed on the client side on a PC-Intel, Mac, Motorola or UNIX-Solaris machine …

Dc Link Stabilized Field Oriented Control Of Electric Propulsion Systems, Keith Corzine, S. D. Sudhoff, Steven F. Glover, H. J. Hegner, H. N. Robey

Electrical and Computer Engineering Faculty Research & Creative Works

Induction motor based electric propulsion systems can be used in a wide variety of applications including locomotives, hybrid electric vehicles, and ships. Field oriented control of these drives is attractive since it allows the torque to be tightly and nearly instantaneously controlled. However, such systems can be prone to negative impedance instability of the DC link. This paper examines this type of instability and sets forth a readily implemented albeit nonlinear control strategy to mitigate this potential problem.

Rose Ausländer (1901-1988): Austria-Hungary/Germany, Kathrin M. Bower

Languages, Literatures, and Cultures Faculty Publications

Rose Ausländer was born Rosalie Beatrice Scherzer on 11 May 1901 into a German-speaking Jewish family. She spent her childhood in Czernowitz, the capital of Bukovina, a province of the Austro-Hungarian Empire. After World War I, Bukovina was incorporated into Romania, and at the end of World War II was annexed by the Soviet Union. Rosalie Scherzer studied literature and philosophy at the university in Czernowitz but never completed a degree, largely because of the family's poverty after her father's death in 1920. To help alleviate this economic situation, she emigrated to the United States in 1921 with lgnaz Ausländer. …

Contribution Of Externally Bonded Frp To Shear Capacity Of Rc Flexural Members, Ahmed Khalifa, William J. Gold, Antonio Nanni, M. I. Abdel Aziz

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Fiber reinforced polymer (FRP) materials are continuing to show great promise for use in strengthening reinforced concrete structures. These materials are an excellent option for use as external reinforcing because of their light weight, resistance to corrosion, and high strength. Externally bonded FRP sheets have been used to increase moment capacity of flexural members and to improve confinement in compression members. Investigations into the use of externally bonded FRP sheets for shear strengthening have also been conducted and have been shown to be viable. The objectives of this study were to review the current research on shear strengthening with FRP …

Optimizing Multiagent, Multi-Injected Swell Modifier, Marshall B. Addison, Thomas M. Petry

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Interactions of expansive clay soils with transportation facilities have caused billions of dollars of damage. In the process of determining agents and methodologies to overcome expansive clay behavior, multiple injections of chemical agents into the subgrade to modify clay behavior are most promising. A study was conducted to optimize a potassium-rich solution of four parts. The modifying solution has been injected into expansive clay subgrades with success since the early 1970s. A laboratory methodology was developed to inject specimens multiple times and to conduct swell tests. Screening tests were conducted to evaluate linear effects that each of the four constituents …

Hybrid Control Of Seismic Structures With Optimal Placement Of Control Devices, Franklin Y. Cheng, Hongping Jiang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A theoretical study is carried out for optimal controller placement and effectiveness of a hybrid seismic response control system comprising a viscous fluid damper and a servovalve-controlled hydraulic actuator. A stochastic seismic response of controlled structures is first investigated with nonorthogonal damping and stiffness; then a statistical method for optimal placement of control devices on seismic-resistant structures is developed. With such placement, a hybrid system can achieve greater performance in that much less control force is required to reduce structural seismic response to a given level. This study also shows the hybrid system is superior to both active and passive …

Recent Research And Developments In Cold-Formed Steel Framing, Roger A. Laboube, Wei Wen Yu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Recent research studies at the University of Missouri-Rolla (UMR) have focused on developing a better understanding of the behavior of cold-formed steel members and truss assemblies. This research was initiated by the more widespread use of cold-formed steel in the residential construction market, and the need to provide structurally reliable, as well as highly economical design solutions. Steel trusses are commonly assembled using C-shaped sections and self-drilling screws. Based on UMR findings, appropriate design recommendations have been proposed for the web and chord members of a truss. Also of concern is the introduction of large holes in the webs of …

The Future Of Limited Liability Companies For Business And Estate Planning Purposes In Mississippi, J. Larry Lee

MC Law Review

No abstract provided.

Young V. Fordice: Challenging Dual Registration Under Section 5 Of The Voting Rights Act, Brenda Wright

MC Law Review

Symposium - An Analysis of Mississippi Cases Argued before the United State Supreme Court

Characterization Of Generalized Haar Spaces, M. Bartelt, W. Li

Mathematics & Statistics Faculty Publications

We say that a subset G of C₀(T, ℝ^k) is rotation-invariant if [Qg: g ∈ G]=G for any k x k orthogonal matrix Q. Let G be a rotation-invariant finite-dimensional subspace of C₀(T, ℝ^k) on a connected, locally compact, metric space T. We prove that G is a generalized Haar subspace if and only if P_G(ƒ) is strongly unique of order 2 whenever P_G(ƒ) is a singleton.

Employee Expectations And Job Stress: A Study Of Attrition In The Employment Of Telemarketers, Jeff Cooper

Dissertations and Theses @ UNI

The present study investigated the factors associated with the extremely high attrition rate of a large midwestern telemarketing firm. Factors associated with employee expectations, stressful organizational characteristics, and job satisfaction were explored. The research strategy involved multiple questionnaires, dissatisfaction surveys, and a semi-structured interview, that were developed by the researchers based on information obtained from the company. Current and former employees of the company participated in the study. Results indicated the presence of stressful organizational characteristics that were common between current and former employees. Sale conversion rate pressure from supervisors and inadequate training were identified as the most salient factors …

Graduate Recital In Voice, Paul Huber

Dissertations and Theses @ UNI

In partial fulfillment of the Master of Music degree requirements for performance, I performed a recital on Monday, October 26, 1998, in the Russell Hall Auditorium at the University of Northern Iowa. The recital consisted of three art songs by Gaetano Donizetti, a selection of art songs from Franz Schubert's Schwanengesang, Samuel Barber's Dover Beach, and Maurice Ravel's Don Quichotte á Dulcinee.

Gangs, Drugs, And Delinquency, Tina Renea Engstrom

Dissertations and Theses @ UNI

The main objective of this thesis is to study the link between gangs, drug use, and delinquency. Previous literature suggests that social learning and social control theories commonly provide theoretical contexts for explaining deviant behavior. The present research applies the principles of Sutherland's (1949) theory of differential association and Hirschi' s (1969) theory of social control to the delinquent behavior of gang members and their drug involvement. The present study does not attempt to explain why youths become gang members. Rather, this research uses an integration of social learning and social control theories to explain why gang members become involved …

Free To Choose, Randy E. Barnett

Georgetown Law Faculty Publications and Other Works

No abstract provided.

Database Security: Evaluation Of A Multi-Policy Access Control Model, Fei Dong

Dissertations and Theses @ UNI

As an increasing number of organizations become dependent on access to their data stored in the database, the need for adequate security measures is becoming more and more critical. Enforcing data protection means safeguarding data from unauthorized or improper disclosures or modifications. Access control policies should be independent of the mechanisms that will implement the physical control of access: this allows control mechanism to be available for different policies. Although considerable work was done on access control models and related mechanisms for databases (Castano & Fugini, 1994), current access control models and mechanisms are not flexible enough to meet the …