Digital Commons Network^™

Adaptive Space-Time Processing For Wireless Communications, Xiao Cheng Bernstein

Dissertations

Adaptive space-time processing techniques have been found to increase the capacity of two major, multiple-access wireless communication systems: Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA).

In an IS-54 TDMA system, the frequency re-use factor has to be set to 7 so that cells with the same spectrum are separated far enough to meet a required carrier-to-interference ratio (CIR). Space processing uses multiple antennas which, in turn, provide alternative signal paths in order to cancel interferences and combat multipath fading. We have proposed the eigencanceler method and have reviewed the theoretical optimum combining and the feasible direct …

Identifying And Exploiting Concurrency In Object-Based Real-Time Systems, Guohui Yu

Dissertations

The use of object-based mechanisms, i.e., abstract data types (ADTs), for constructing software systems can help to decrease development costs, increase understandability and increase maintainability. However, execution efficiency may be sacrificed due to the large number of procedure calls, and due to contention for shared ADTs in concurrent systems. Such inefficiencies are a concern in real-time applications that have stringent timing requirements. To address these issues, the potentially inefficient procedure calls are turned into a source of concurrency via asynchronous procedure calls (ARPCs), and contention for shared ADTS is reduced via ADT cloning. A framework for concurrency analysis in object-based …

On Optimal Design And Applications Of Linear Transforms, Mehmet V. Tazebay

Dissertations

Linear transforms are encountered in many fields of applied science and engineering. In the past, conventional block transforms provided acceptable answers to different practical problems. But now, under increasing competitive pressures, with the growing reservoir of theory and a corresponding development of computing facilities, a real demand has been created for methods that systematically improve performance. As a result the past two decades have seen the explosive growth of a class of linear transform theory known as multiresolution signal decomposition. The goal of this work is to design and apply these advanced signal processing techniques to several different problems.

The …

On The Optimization Problems In Multiaccess Communication Systems, Gangsheng Wang

Dissertations

In a communication system, the bandwidth is often a primary resource. In order to support concurrent access by numerous users in a network, this finite and expensive resource must be shared among many independent contending users. Multi-access protocols control this access of the resource among users to achieve its efficient utilization, satisfy connectivity requirements and resolve any conflict among the contending users. Many optimization problems arise in designing a multi-access protocol. Among these, there is a class of optimization problems known as NP-complete, and no polynomial algorithm can possibly solve them. Conventional methods may not be efficient arid often produce …

Anaerobic Digestion And Acid Hydrolysis Of Nitrocellulose, Fong-Jung Tai

Dissertations

In this investigation, studies were conducted to evaluate the biodegradation of nitrocellulose in anaerobic batch reactors with and without the supplemental carbon inducers, such as cellulose, cellobiose, and lactose. Results from the anaerobic study show that degradation of nitrocellulose alone is difficult and that nitrocellulose degradative enzymes could be induced by the three inducers tested. As high as 48.91% conversion could be obtained at Cellulose/Nitrocellulose ratio of 1 to I. Studies also indicated that type 20 and 50 celluloses would be more effective and optimum pH was about 6.4 in biodegradation of nitrocellulose. Three testing systems, namely, single-stage, two-stage, and …

An Investigation Of The Mechanism Of Advanced Oxidation Processes (Aop) Involving Free Radicals And Charged Species., Yaw-Kuen Lin

Dissertations

Hydrogen peroxide is a key component in Advanced Oxidation Processes (AOP). Its decomposition at different pH conditions has been studied and some interesting results were observed. When the pH value of hydrogen peroxide solution is less than 9, its rate of decomposition is independent of pH. On the other hand, in the pH range of 9-12.6, its rate of decomposition increases as pH increases, and goes through a maximum value then suddenly decreases with respect to pH. A reaction kinetic model with three rate constants in the form of beta probability function was used to describe the experimental data of …

Weathering The Storm Persevering Through A Difficult Time, Lynn Allchin-Petardi

Dissertations

No abstract provided.

A Case Study Of The Change Process In An Urban Public School As Teachers React To Mandated Change, Susan Kurland

Dissertations

No abstract provided.

A Study Of The Influence Of Organizational Context On The Purpose, Structure, Operation And Impact Of School Leadership Teams In Suburban Elementary Schools, Aurora Marie Morris-Chase

Dissertations

No abstract provided.

A History Of The Helen C. Peirce School Trust, 1915-1938, Janice Marienthal Rosales

Dissertations

No abstract provided.

The Relationship Between Child Sexual Abuse And Hypoactive Sexualdesire Disorder In Adult Women: An Investigation Of Contributory Factors And Treatment Outcomes, David B. Sarwer

Dissertations

No abstract provided.

A Return Of Christianity: The Christian Education Of Korean- American Children In The Chicago Area By Parents, 1965-1995, Mark Yoon

Dissertations

No abstract provided.

School Reform: Leadership Through Shared Decision-Making, Mary Juliet Martel Edd

Dissertations

Educational reform has a long history and schools have gone through cycles of change. This study, however, focuses on the last ten years of reform, often referred to as the restructuring movement. Shared decision making is one of the fundamental changes promoted by this current reform effort. Restructuring the decision-making process to include teachers and parents is a significant change from the hierarchical process that has been in place in most of today's schools. It is time to recognize that schools are complex social institutions that experience change only through its people. By giving those closest to children a stronger …

An Evaluation Case Study Of The Effects Of A Learning Style Awareness Program For Ninth Graders At An Independent School, Dorene Casey Mclaughlin Edd

Dissertations

The purpose of this study was to examine the implementation of a year-long learning style awareness program and its effects on locus of control and academic achievement in a ninth grade population. This study was also designed to collect subjective data from students on their perceptions of responsibility for their own achievement, ability to identify their individual learning style, a willingness to ask for help, and in addition, over parental conflict. This study was conducted, using a sample of 76 ninth graders, at an independent college preparatory school in a large Southern California city. All subjects were administered the National …

The Wrath Of Ignorance: Schizophrenic Policies In Access To Health Care For Undocumented Latinas, Antonia J. Spadaro Edd

Dissertations

This study focuses on the problems of health care access experienced by undocumented Latinas: women from Mexico, Central and South America, and the Caribbean. Those who are undocumented may encounter significantly reduced access to health care, for the risk of discovery causes them to be more furtive in their activities. Undocumented immigrants to the U.S., especially Latin women, confront myriad obstacles in obtaining health care that are sociocultural, political, economic, and personal. The problem of competing policies in the health care arena represents one of the most formidable obstacles for undocumented persons. These conflicting conditions are such that some services …

A Study Of The Concomitant Problems Facing Most Of The "At-Risk" African American Students In The Benton Harbor Elementary School System: A Case For An Alternative Model, Simon M. Honore

Dissertations

Problem

It would appear that the problem of school truancy, retention, and subsequent academic failure is a major educational crisis which puts most of the African American students at risk in the Benton Harbor area schools.

Purpose

The purpose of this study has been to determine the concomitant educational problems facing the "at-risk" African American students in the Benton Harbor Elementary School System and to suggest positive changes through an alternative model.

Results

The results of the survey indicated that approximately 90-95% of Benton Harbor educators agreed to changes. Administrators and teachers strongly agreed that the recommendations, based on the …

The Empirical Development Of A Curriculum On The Issues Concerning The History Of Ancient Israel, Ruzica Gregor

Dissertations

Problem. An understanding of Israel's history is crucial to a Christian view of history, including its morals and values, and is a foundation stone of most conservative Christians including Seventh-day Adventists and their religious educational philosophy. There is a vital need for a curriculum that provides reasonable answers to the most frequently asked questions about Israel's early history and builds a solid base for the Christian/Adventist faith. The purpose of this study was to meet this need by empirically developing a curriculum for religion majors in Seventh-day Adventist colleges. Issues discussed include the Philosophical Background and Importance of History; the …

The Relative Effectiveness Of Face-To-Face And Telephone Contact By Community Mental Health Workers During Psychiatric Inpatient Treatment Of Children And Adolescents, Bruce Patrick Hackworth

Dissertations

Problem. With the advent of managed care has come the increasing necessity to provide effective and efficient services to children and families experiencing severe emotional disturbances. The use of cost-effective and therapeutically effective services is at the crux of an effective service delivery system. Few studies have considered the usefulness and comparative effectiveness of face-to-face versus telephone interventions in therapeutic situations. This study considered the clinical value of face-to-face community mental health worker involvement during and after psychiatric inpatient hospitalizations of children and adolescents ages 11-17. The study also considered the comparative value of this follow-up when using master's-trained, mental …

Moral Orientation, Ego Maturity, And Religious Commitment : An Exploratory Study From A Developmental Perspective, Penelope Anne Webster

Dissertations

Problem. Although moral development research has focused extensively on Kohlberg's moral judgment theory and Gilligan's considerations of moral orientation, little has directly addressed the issue of integration of the voices of care and justice. This study proposed that, with maturation, a more integrated moral orientation would guide moral decision making. Integration and the impact of age, gender, ego maturity, and religious commitment were examined from a developmental perspective.

Method. A cross-sectional design was employed, with adults from two age cohorts (25-35 and 50-65). A semi-structured interview (Brown, Debold, Tappan, & Gilligan, 1991) was used to collect data. Each individual …

The Relationship Between Dissociation And Object-Relations Impairment In Adult Female Incest Survivor Clients With And Without Personality Splitting, Linda Jean Stuppy

Dissertations

Problem. Childhood incest appears to play a role in the formation of Dissociative Identity Disorder (DID) (formerly Multiple Personality Disorder). This study investigated whether a relationship exists between dissociation and object-relations impairment in incest survivors and whether DID incest survivors have higher levels of these characteristics than non-DID incest survivors.

Method. The Dissociative Experience Scale, Bell Object Relations Reality Testing Inventory and Childhood Maltreatment Interview Schedule-Short Form were completed by a sample of 60 adult female incest survivor clients. 29 who met the diagnosis for DID and 31 who did not.

The Results. All three hypotheses were supported …

Regulation Of Sarcoplasmic Reticulum Calcium Atpase (Serca2) Gene Expression In Left Ventricular Hypertrophy And Heart Failure, Ming Qi

Dissertations

No abstract provided.

Chicago Public Schools March Off To War: Participation Of The City Public Schools In The Second World War: 1941-1945, Joan L. Rog

Dissertations

No abstract provided.

An Analysis Of Selected Aspects Of The Role Of The High School Principal In The Chicagoland Area In Light Of Leadership-Orientation, Antonia C. Bouillette

Dissertations

No abstract provided.

The Synthesis Of Azure B Derivatives: Potential Pro-Drugs For Photodynamic Therapy, Carla M. Edwards

Dissertations

No abstract provided.

Pharmacologic Studies On Synthetic Analogues Of Heparin With Selective Affinity To Endogenous Serine Protease Inhibitors, Walter P. Jeske

Dissertations

No abstract provided.

The Literary Study Of Non-Fiction: An Analysis Of Selected Works By George Orwell, Richard Wright, Zora Neale Hurston, And Virginia Woolf, Kenneth S. Rogers

Dissertations

No abstract provided.

A Study Of The Relationship Between Psychological Androgyny And College Adjustment Among Korean American College Students, Daniel Donghyun Kim

Dissertations

Problem. The process of adjusting to college has been difficult for many Korean-Americans because of the tension that exists between traditional sex roles versus androgynous sex roles. While it has opened doors to new and exciting opportunities in personal growth, complex challenges of academic, emotional, and social adjustments must be made. The traditional views of the subculture have posed unique problems for young Korean Americans who have enrolled in higher education. This descriptive study examined the relationship between androgynous flexibility and the college adjustment of Korean American students. Androgynous flexibility was investigated in terms of college adjustment.

Method. The sample …

Critical Attributes Of Teachers Who Have Become Practitioners Of Authentic Assessment, Bernadette Meisenheimer

Dissertations

No abstract provided.

The American Bible College: An Eye To The Future, Larry J. Davidhizar

Dissertations

No abstract provided.

The Cognitive Appraisals And Coping Strategies Of Male Adolescent Inpatients, Kathleen Burroughs

Dissertations

No abstract provided.