Field ion microscope investigations of solid solutions Annual report

Ion microscopic studies of solute atoms in solid solution lattice

Free radical tissue damage and the protective role of antioxidant nutrients

November 17, 1988--Cover.Title from JPEG cover page (University of Missouri Digital Library, viewed June 17, 2010).Includes bibliographical references (pages 14-15)

The Impact of Dimensions of Experience on Behavior: Examining the Role of Deprivation and Threat in Early Childhood

Deprivation, defined as the absence of expected cognitive and social inputs, is associated with worse executive functioning. Threatening experiences, defined as the presence of atypical traumatic learning experiences, are associated with impaired fear learning processes. No prior work has examined the effects of deprivation and threat together outside of adolescence. The present study examines how deprivation and threat are associated with behavior in children 4-7 years old. Children (N = 63) completed executive functioning and fear conditioning tasks. To operationalize deprivation and threat, an index score was created from each relevant measure from child and parent report. Deprivation was associated with worse cognitive control. Threat was associated with greater attentional bias towards threat-related cues and greater generalization of physiological response during fear extinction. All analyses controlled for age, gender, IQ, and other experiences (deprivation or threat). Future work should examine neural mechanisms underlying behavioral changes associated with early adversity.Master of Art

Trembling on the Precipice of Possibility: A Story About Becoming a Teacher Educator for Social Justice

AbstractThis article describes the strategy of creating an illustrated story book as an attempt to invite teacher education candidates to engage in deeper reflection and critical analysis common sense which shapes their teaching. In the process of describing how to teach preservice teachers to teach for social justice the author uses examples from her own development as a teacher educator for social justice. The author suggests four elements that may be critical to teaching teacher candidates to persevere in rigorous critique of their own common sense. They are imagery and intensifying metaphor; foolishness; a dialectic of criticality and joy; and communal sharing.            Keywords: teacher education, critical analysis, preservice teachers, social justic

How Early Adversity Becomes Biologically Embedded and Associated Risk for Psychopathology

The Dimensional Model of Adversity and Psychopathology is a model that links dimensions of early adversity to specific neurobiological mechanisms, which are then associated with risk for psychopathology across development. The model differentiates between the impact of deprivation and threat on neurobiological functioning. Deprivation is conceptualized as the absence of or lack of complexity in expected cognitive and social inputs. Threat is conceptualized as harm or threat of harm to oneself or a close other. Prior research has linked deprivation and threat in childhood with unique associations with behavior across the lifespan. However, more research is needed to understand how deprivation and threat may impact different neurobiological systems and how those associations influence risk for psychopathology in early childhood and adolescence. Across three papers, the current work examines how deprivation and threat are associated with differences in brain structure, physiological response during fear learning, and neural activation during a social evaluation task. Results suggest distinct associations of deprivation and threat on brain structure in early childhood. Additionally, threat was associated with altered fear learning in youth and less ventrolateral prefrontal cortex activation during peer social evaluation. These studies may contribute to understanding mechanistic targets for future intervention for youth with adversity exposure across childhood and adolescence.Doctor of Philosoph

Quantitative treatment of the creep of metals by dislocation and rate-process theories

An equation for the steady-state rate of creep has been derived by applying the theory of dislocations to the creep of pure metals. The form of this equation is in agreement with empirical equations describing creep rates. The theory was also used to predict the dependence of steady-state rate of creep on physical constants of the material and good agreement was obtained with data in the literature for pure annealed metals. The rate of creep was found to decrease with increasing modulus of rigidity. This relation suggest that one of the requirements for a heat-resisting alloy is that its matrix be a metal that has a high modulus of rigidity and therefore a high modulus of elasticity

A survey of the behavior of carbon in tungsten as revealed by field-ion microscopy technical report no. 1

Behavior of carbon in tungsten as revealed by field-ion microscop