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Investigation Of The Baroreflex Of The Rat : Steady State And Dynamic Features, Xiaorui Tang

Dissertations

The baroreflex is one of the most important feedback systems in the body to maintain blood pressure variation within the homeostatic range. In this dissertation, the important features of the carotid and aortic baroreflexes have been extensively investigated on ventilated, central nervous system intact, neuromuscular blocked (NMB) rats using different control system and signal processing tools. Studies have demonstrated that sinoaortic denervation (SAD) caused substantial increases in the blood pressure variability. Comparing the pre- and post-SAD blood pressure spectra, there was a significant increase of power in the very low frequency region (0.00195 -0.2 Hz), and a significant decrease of …

Bilinear Time-Frequency Representations Of Heart Rate Variability And Respiration During Stress, Rindala Saliba

Dissertations

Recently, joint time-frequency signal representation has received considerable attention as a powerful tool for analyzing a variety of signals and systems. In particular, if the frequency content is time varying as in signals of biological origin which often do not comply with the stationarity assumptions, then this approach is quite attractive. In this dissertation, we explore the possibility of better representation of two particular biological signals, namely heart rate variability (HRV) and respiration. We propose the use of time-frequency analysis as a new and innovative approach to examine the physical and mental exertion attributed to exercise. Two studies are used …

Detection Of Sexual Cues: An Assessment Of Nonaggressive And Sexually Coercive College Males, Rita Kenyon-Jump

Dissertations

Seventy-four nonaggressive and 78 sexually coercive college males, as determined by the Sexual Experiences Survey (Koss & Oros, 1982) and ranging in age from 18-25 years, participated in a study designed to assess their ability to detect specific behavioral cues of female partners’ unwillingness to engage in kissing, genital fondling, and sexual intercourse. Contrary to prediction, a 2 (nonaggression and sexual coercion) X 3 (kissing, fondling, and intercourse) analysis of variance revealed no statistically significant difference between the nonaggressive and sexually coercive males in their ability to detect cues of female unwillingness to engage in kissing, genital fondling, and sexual …

The Impact Of Feeding Methods On Exclusion From Child Care For Infants Under Six Months Of Age, Elizabeth G. Jones Edd, Mph, Rd

Dissertations

The increasing numbers of women entering the work force have created a greater need for accessible, quality, and affordable child care. Concurrently there is rising concern about the transmission of infection in child care settings. There is evidence, but no consensus, that breastfeeding may offer protection from infection, especially during the first months of life. However, employed/student mothers report that efforts to maintain breastfeeding are not well supported at the work/school site. The purpose of this investigation was to examine the impact of infant feeding methods on the exclusion rate due to illness among infants less than six months of …

The Evolving Biology Textbook In Chicago Secondary Schools: From The Progressive Era To The Present, Addie Beatrice Cain

Dissertations

No abstract provided.

Gender Difference As A Factor In Psychological Crisis, Paula Laufer

Dissertations

The study's purpose was to examine possible gender differences in problem perception and desired treatment outcome of 311 persons (135 males and 176 females) selected from a pool of 1500 clients seeking treatment at an outpatient mental health clinic in a medium-sized midwestern city. One hundred males and one hundred females were randomly selected for inclusion.

Literature related to crisis theory, research in linguistics, and gender role indicated evidence supporting gender role differences in a variety of interpersonal situations. Clients' verbatim written statements and their reactions to a standard problem checklist at the time of intake provided the data base …

Path-Goal Theory Of Leader Behavior And Its Relation To Job Satisfaction As Moderated By The Intrinsic Motivation Of The Task, Diane Lloyd Gillo

Dissertations

The path-goal theory of leadership, based on an expectancy formulation of motivation, provides a potent schema for the investigation of the relationship between leader behavior and subordinates' satisfactions in the workplace. The inclusion of task related satisfactions has been dealt with as a contingency factor, but this study included the measurement of task design variables consistent with the task design literature.

According to the path-goal theory, leaders are effective because of their impact on subordinates' motivation, ability to perform effectively, and satisfactions. The study was designed to analyze the relationship between the independent variable of leader behavior and the dependent …

Design And Analysis Of An Instrument System For Rheological Testing Of Whole Blood Samples, Robert Rimvydas Sinusas

Dissertations

The dissertation covers the conceptual design of a rheometer for testing whole blood samples through to the clotting state. While the design aims at increased measurement accuracy, the design employs well known technologies and available components.

The main reason for preoccupation with blood testing is that recent investigations have indicated that physiological disorders can be correlated with rheological properties of blood. The pursuit of an improved means of correlation is initiated with a survey of the rheological properties of blood. The relevance of these blood properties is then discussed. From this discussion a broader blood model is developed as a …

The Integrated Basic Science Course At Kalamazoo Valley Community College, Dorothy Nichols Hackett

Dissertations

No abstract provided.

The Effect Of Local Heat Application On The Human Skin, Fred Berthold Benjamin

Dissertations

No abstract provided.