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Signal Processing Techniques In Heart Rate And Systolic Arterial Blood Pressure Variability Studies, Christopher O'Bara

Theses

Power spectral analysis of heart rate and systolic arterial blood pressure variability provides a window to the activity of the autonomic nervous system. To derive power spectra from raw blood pressure and electrocardiogram signals, many steps of signal processing must be performed. Most popular methods of spectral analysis require evenly spaced samples; therefore interpolation and resampling techniques must be used.

The results of the present study indicate that different interpolation techniques result in spectral distortions that vary depending upon the interpolation methods used as well as physiological parameters such as heart and respiration rate. Different interpolation methods applied to heart …

Heart Rate Variability Studies On Ambulatory Subjects Using Ekg Derived Respiration, Xiaorui Tang

Theses

Power spectral analysis of heart rate variability (HRV) provides a powerful non-invasive too] for exploring the balance between sympathetic and parasympathetic components of the autonomic nervous system. In the spectrum of HRV, there are three distinct peaks. The high frequency (HF) band (0.15 to 0.4 Hz) is correlated with parasympathetic activity and this is the band of interest 'in the study.

Two OTOUPS Of SL113jeCtS were considered in this work, stroke survivors and subjects performing an oral presentation in front of an audience. Data were collected with a Holter monitor to allow for ambulatory recording. Respiration was derived from the …

Model Parameter Identification For Rod And Cone Oscillatory Potentials, Kehur Banker

Theses

The use of signal modeling of the oscillatory potential (OP) of the electroretinogram (ERG), in the study of cone-rod interaction is investigated. ERG response data were analyzed for red, orange, blue and white flashes on no background and with red flashes on a blue background (to suppress rod responses). The OP signals were extracted from the ERG by digital bandpass filtering and a signal model was fitted through a simplex algorithm to produce the parameters including "OP envelope-amplitude", latency in terms of "center-time" of the OP-envelope and OP frequency. Amplitude for red flashes with or without a blue background showed …

Influences Of Cardiac And Respiratory Parameters On Heart Rate Variability, Melissa Leifer

Theses

Heart rate variability is a result of variation in the activity of the sympathetic and parasympathetic nervous systems. Methods have been developed to determine the level of parasympathetic activity by observing the heart rate variability spectrum. Most of the previously published research uses only level of parasympathetic activity and respiratory rate to draw conclusions about the interactions of the autonomic nervous system with physiological parameters. In order to gain a complete understanding of the autonomic nervous system and the mechanisms responsible for heart rate variability, respiratory volume, cardiac variables and pulmonary variables need to be considered. In addition, amount of …

Three Dimensional Diaphragm Simulation Model For The Relationship Of The Tension, Pressure And Shape, Zhangming He

Theses

Weakness of inspiratory muscles is a major cause of respiratory failure. There are many clinical circumstances in which it may occur. The diaphragm is a major respiratory muscle. It has been difficult to quantify its shape, curvature and length.

To solve this question, a three dimensional diaphragm equation was derived on the, assumption that the diaphragm is only attached at its periphery to the rib cage and the abdomen is filled with fluid. Computer programs were developed to fit the equation to the diaphragm contours obtained from plane X rays.

The results indicate that the ratio of transdiaphragmatic pressure to …

An Analysis Of Management Philosophies: The Economic Benefits Of Job Enrichment And Proactive Management Techniques, William C. Slizewski

Theses

This thesis examines the various managerial philosophies active in the American corporate environment in the late 1900's, their roots, and diverse influences. The management philosophies employed by an organization greatly influences the perceptions held by that organization's employees, the public, and other firms.

In recent years many management "gurus" have touted their programs as the key to the establishment of profitable managerial procedures. While a few programs have succeeded in turning organizations around, some enterprises are still in the development stage of their newfound philosophies and time will tell whether or not the programs will be successful. And then there …

A Multicompartmental Model For The Simulation Of Soluble Gas Exchange In The Lungs, Chitaranjan Varadhan

Theses

No abstract provided.

Adding New Life To Years: A Senior Peer Exercise Program, Cynthia Lymm Pearl Nayer

Theses

The thesis "Adding New Life to Years: A Senior Peer Exercise Program" explores the development and impact of a peer-led exercise program aimed at improving physical, social, and emotional health among older adults. Recognizing the challenges associated with aging—such as decreased mobility, social isolation, and chronic health issues—the study focuses on engaging active seniors as volunteer leaders to conduct low-intensity exercise classes for frail elderly participants.

This program aims to foster mutual benefits: healthy senior volunteers experience enhanced self-worth, social engagement, and physical fitness, while the frail elderly improve in areas like blood pressure, mood, and perceived self-efficacy. Grounded in …

Spectral Analysis Of Heart Rate Variability: Acquisitionalysis Software Development, David James Delong

Theses

This work develops an acquisitionalysis software application to investigate the spectral content of the heart rate variability signal derived from an electrocardiographic (EKG) waveform. The location and strength of the frequency content reveals general information concerning sympathetic and parasympathetic activity within the autonomic nervous system of the study subject. Current investigations into pediatric head trauma patients have revealed specific correlations between spectral content of the heart rate variability and overall patient recovery. The levels of serum catecholamines, specifically epinephrine and norepinephrine, are also investigated for a possible correlation with both trauma severity and spectral power of the heart rate variability …

Options And Limits In A Woman's World, Teresa A. Davis

Theses

This is a study of women who are ascribed the role of mother, but who would also like to pursue a satisfying career. These women experience multiple demands when trying to fulfill these multiple roles. The study focused on how women integrate motherhood and employment. The methodology employed in this study was qualitative. Information was solicited through the use of informal personal interviews conducted by the researcher. A single hour interview was conducted with each participant in the research project. The sample consisted of 10 full - time working mothers who volunteered to participate in the project.

The purpose of …

My Student Years, David J. Urgo

Theses

None provided.

Bathrooms Can Be Easier To Use!, Kathryn Kochanowski

Theses

None provided.

The Effects Of Position And Gender In Evaluating Job Factors, Yen-Yueh Yin

Theses

This study investigated the extent to which corporate recruiters and students share an understanding of desirable job factors. To identify the differences between the two groups, 114 students and 26 recruiters completed a questionnaire on twenty three job factors. Univariate analyses revealed significant differences between the two groups. The implications of these findings for recruitment, selection, and career counseling are discussed.

Muscle In Motion: Four Of The Most Common Overuse Injuries Of The Bicyclist, Carol France Kalafatic

Theses

Not Included

Bioenergy And Emotions, Vickie C. Walter

Theses

This thesis explores the concept of bioenergy as an integral force underlying both human physiology and emotional experience. Drawing on a wide range of historical, cultural, and scientific perspectives, the work examines how different traditions and researchers have conceptualized and attempted to measure or influence this subtle energy. The discussion begins with Wilhelm Reich’s notion of “orgone energy,” a vital force he linked to psychological health and emotional regulation. Reich’s controversial theories and experimental devices are considered in the broader context of psychoanalysis and somatic therapy.

The study then traces parallels between Reich’s work and ancient energy systems such as …

A Metalsmith's Guide To Toxicology, Margery Beth Rose

Theses

Not listed.

Biocatalytic Oxidation Of Nitrilotriacetate, Saul Hammerman

Theses

The specific scope of this work is to study the biological and chemical effects of a single genetic strain of bacteria, Bacillus subtilis #9524, on the specific destruction to innocuous products of sodium nitrilotriacetate (NTA) and sodium tripolyphosphate (STPP). Insofar as the same strain of bacteria was used each time, under limited variability and sterile conditions, the side effects of multiple bacterial strains and their inter-relationships among themselves and the organic substrates are eliminated. This has allowed for excellent replication of results.

This is a generalized technique for the evaluation of the biodegradability of a compound. Whereas tests with activated …