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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
291

Climate Driven Glacial Retreat, Surface Uplift, and the Rheological Structure of Iceland: Insights from cGPS Geodesy

Compton, Kathleen, Compton, Kathleen January 2016 (has links)
In Iceland, glaciers cover approximately 11% of the land surface and comprise the country's largest reservoir of freshwater. Increases in summer temperatures since the mid-1980s have led to rapid mass loss from the Icelandic ice caps of 9.5-11.4 Gt/yr, and continuously operating GPS stations nationwide have recorded rapid and accelerating surface uplift. Understanding the behavior of Icelandic ice caps-and their relationship to surface uplift, which is modulated by the rheological structure of the crust and upper mantle-has important implications for water resource management and geohazards analysis. The goals of this study are twofold. First, we aim improve the current estimates of glacial isostatic adjustment (GIA)-related uplift in Iceland and to examine if and how uplift rates have changed over the last several decades. Secondly, we explore the utility of motion recorded by continuously operating Global Positioning System stations (cGPS) as an independent measure of ice cap mass variation over both decadal and annual time scales. We take advantage of the now longstanding cGPS network in Iceland and consider position time series from 62 stations across the entire island. Observations made by cGPS stations from 1995-2014.7 show a broad region of rapid uplift in central Iceland with near zero uplift observed along the coastal regions to the north and west. The most rapid uplift and uplift accelerations occur near the center of the island, between the Vatnajökull and Hofsjökull ice caps, with rates exceeding 30 mm/yr and accelerations of 1-2 mm/yr². Statistically significant uplift and uplift accelerations are recorded at 27 of the 62 cGPS stations, and estimates for the timing of uplift initiation correlate with Arctic warming trends and observations of increasing summer temperatures since the mid-1980s. These results represent a significant improvement over previous uplift estimates and indicate a likely relationship between accelerated ice cap melting and contemporaneous changes in uplift rates. Incorporating cGPS-recorded information about modern-day uplift rates affects estimates of mantle viscosity. Ice cap thinning rates are computed by a weighted least squares estimation scheme utilizing cGPS-derived secular uplift rates and accelerations and Green's functions for an elastic layer over a Maxwell viscoelastic half-space. We test a range of viscosities from 8 x 10¹⁷ and 1 x 10²⁰ Pa·s and find that thinning rates computed with low viscosities between 2 x 10¹⁸ and 1 x 10¹⁹ Pa·s match independently derived ice cap thinning rates best, in accordance with previous upper mantle viscosity estimates. Similar estimation techniques demonstrate the utility of cGPS to provide a seasonal mass variation time series as a potential low-cost compliment to traditional field-based mass balance measurements. We use estimates of secular site velocity and acceleration to reduce the time series and focus only on the annual periodic motion. The increased temporal resolution afforded by the daily cGPS position estimates recovers the interannual variability in the timing and magnitude of accumulation and melt seasons with a small RMS reduction relative to a sinusoidal model. We also find we are able to identify of the effects of both ice cap insulation as well as reduced surface albedo following volcanic eruptions.
292

Interrelationships between Measures of Personal-social Adjustment and Measures of Improvement in a Hospital Setting

Koehn, Sharon 01 1900 (has links)
The purposes of this study were (1) to explore the possibility that sociometry can be a valuable prognostic method in milieu therapy, and (2) to investigate the validity of the "Draw-a-Group" (DAG) projective technique for measuring interpersonal responsiveness.
293

The Influence of Teacher-pupil Relationships on the Social Adjustment of Homemaking Students in a Small Rural High School

Malone, Rebecca Park 01 1900 (has links)
The present study purposes to determine whether or not teacher-pupil relationships bring about improvement in the social adjustment of homemaking students in a small rural high school. It further purposes to determine the nature and extent of any measurable improvement.
294

Mutual Influences in Romantic Attachment, Religious Coping, and Marital Adjustment

Pollard, Sara E. 08 1900 (has links)
This study examined associations among romantic attachment anxiety and avoidance, positive and negative religious coping, and marital adjustment in a community sample of 81 heterosexual couples. Both spouses completed the Experiences in Close Relationships Scale (ECR), a brief measure of religious coping (Brief RCOPE), the Dyadic Adjustment Scale (DAS), and a demographic questionnaire as part of a larger study. Multilevel modeling (MLM) for the actor-partner interdependence model (APIM) was used. Attachment avoidance was inversely related to positive religious coping. In contrast, attachment anxiety was directly related to negative religious coping. Positive religious coping buffered the relationship between attachment avoidance and marital adjustment. In contrast, attachment anxiety was detrimental to marital adjustment regardless of positive religious coping, and positive religious coping was related to higher marital adjustment only in the context of low attachment anxiety. Surprisingly, the spouse's attachment anxiety was inversely related to the respondent's marital adjustment only when the respondent reported low levels of negative religious coping, whereas in the context of high negative religious coping, the partner's attachment anxiety was related to higher marital adjustment. Results support using attachment theory to conceptualize religious coping and the consideration of both attachment and religious coping constructs in counseling.
295

Personality Traits as Related to Vocational Interest Patterns

Conekin, Albert McKenzie 12 1900 (has links)
The purpose of the study was to analyze the personality traits of an individual as measured by a standardized personality test instrument and the vocational interest patterns as measured by a standardized vocational interest test. An attempt was made to determine if these identifiable personality traits were related to the ten reordered vocational clusters by means of a simple analysis of variance technique. In order to achieve this purpose, the following hypothesis was developed for investigation: There would be significant differences among the ten vocational clusters identified by the SVIB (Technical Cluster, Intellectual Cluster, Scientific Cluster, Business Cluster, Social Service Cluster, Creative Cluster, Office-Clerical Cluster, Sales Cluster, Concrete Transactions Cluster, and Physical Cluster) on the personality traits as measured by the 16 PF Questionnaire (Sizothymia- Affectothymia, Intelligence, Emotionality-Ego Strength, Submissiveness-Dominance, Desurgency-Surgency, Superego Strength, Threctia-Parmia, Alaxia-Protension, Praxernia-Autia, Artlessness-Shrewdness, Adequacy-Apprehension, Conservatism- Radicalism, Adherence-Self Sufficiency, Integration of Self Concept, and Ergic Tension).
296

Maladjustment and the Distortion of Self-Perception

Love, William Allen 01 1900 (has links)
Contemporary psychology has shown an increasing interest in the self-concept of the individual. This interest has grown in large measure from studies of perception. Many theorists have felt that perception in general and self-perception in particular is a function of the needs of the organism, as well as a function of the external stimuli. It is the purpose of this study to investigate the relationships between distortions in self-perception and total level of adjustment in a population of college students.
297

Made in the USA: A Reality or a Fantasy How the Republican Tax Reform Encourages Executives to Bring Back Manufacturing

Dollar, Alena Victoria 01 January 2017 (has links)
The following thesis outlines the benefits of manufacturing in the United States because of the new Republican tax reform. House Speaker Paul Ryan and President Donald Trump have been proposing large corporate tax cuts, full expensing of capital expenditures, a border adjustment tax, and repatriation of foreign cash flows. These changes will encourage more corporations to manufacture in the USA because the USA will be more globally competitive, a key focus of the Republican administration.
298

The effect of cervical spinal manipulation on elbow flexion torque

15 July 2015 (has links)
M.Tech. (Chiropractic) / The purpose of this study was to establish whether cervical spinal manipulation induces an appreciable and sustainable alteration in muscle torque performance regarding the elbow flexor muscles. Forty asymptomatic individuals participated in this study. Twenty individuals were randomly assigned to either an experimental or control group. Participants selected had to be between 18 and 40 years of age and had to present with cervical motion restrictions involving the fourth to sixth cervical vertebrae, as determined by motion palpation assessment. Participants were randomly recruited from the University of Johannesburg and surrounding areas, based on their response to information pamphlets and word of mouth. The experimental group received cervical spinal manipulation involving the lower cervical segments on three separate occasions. The control group received no intervention. Elbow flexion torque assessments were conducted using the Biodex System 3, isokinetic dynamometer. Two assessments were done prior to intervention and one test following one week of intervention, to ascertain whether cervical manipulation can provoke a sustainable improvement in elbow flexion performance. Cervical range of motion (CROM) assessment was used as a secondary objective evaluation to assess the effectiveness of the manipulation procedures, considering that improvement in cervical range of motion following spinal manipulation is well documented. Minimal improvement in elbow flexion torque involving both arms was observed in the experimental group following one weeks‟ intervention however, no statistical significance was reported. Gender relations regarding the elbow flexion torque performances revealed and improvement in strength in the male participants and a reduction in performance in the female participants. Statistical significance was reported although the significance regarding intervention remains unclear. No sustainable improvement in elbow flexion torque was revealed following spinal manipulative therapy and therefore does not provide conclusive evidence to substantiate the motor neuron excitability theory. The contradictory results with regards to the female participants bring into context an indefinite and unfamiliar neuromusculoskeletal paradigm which requires additional research to clarify these anomalous findings.
299

The Perfect Angel Hypothesis: The Effect of Parents' False Perceptions on Children's Adjustment

Myers, Sonya 08 May 2004 (has links)
This study explored the effects of parental false perceptions of their children's temperament on their subsequent school behavior problems. Participants were parents and teachers of 97 kindergarten children in an urban southern community. Both parents and teachers completed questionnaires on children's temperament, while teachers reported on children's school behaviors. Results indicate that both parent and teacher report of child temperament is related to school behavior problems, however, when parental ratings are more favorable than teacher ratings, this favorability is related to more internalizing and externalizing behaviors in school. In addition, parents rated their children higher on negative emotions, while parents and teachers rated similarly on effortful control. Furthermore, parent ratings of children's negative emotions were predictive of behavior problems above and beyond teacher's report. Findings highlight the relation of parental perceptions to children's school behavior problems and the utility of parent-teacher collaboration in improving children's school adjustment.
300

Contextual and Dispositional Influences on Low-Income Children's School Adjustment

Myers, Sonya Shaniece 18 May 2007 (has links)
Examination of child temperament and early adult-child relationships is of vital importance to children's socio-emotional development, school success, and the prevention of future problem behaviors. In response, the current project examined the interaction of parenting style, child temperament, and the quality of the teacher-child relationship in predicting low-income children's school adjustment. One hundred fifty-four children (70 girls and 84 boys), their parents, lead teachers, and teacher aides participated in this study with data collected in both preschool (Head Start) and in Kindergarten. Parents completed questionnaires pertaining to parenting styles and child temperament, while teachers also completed questionnaires on child temperament, teacher-child relationships, social / behavioral adjustment at school, and academic achievement. Children also reported on their relationships with teachers using a puppet interview format. Analyses indicate that children's effortful control and negative reactivity are associated with a wide range of academic, behavioral, and socio-emotional variables. Results of the current study also provide evidence that negative reactivity, parental hostility, and teacher-child conflict are related to children's social-emotional and academic difficulties; however, effortful control and reduced teacher-child conflict moderate the effects of these negative factors on lowincome preschoolers' school adjustment. Results are discussed in terms of the utility of intervention efforts aimed at reducing negative parent-child and negative teacher-child relationships in order to promote positive school adjustment for low-income children.

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