Doctor of Philosophy in Physics

dissertationLithium is generally considered to be a simple metal, given its simple electronic structure with one valence electron. It is considered to follow a nearly free electron model and have a nearly spherical Fermi surface. However, away from ambient conditions, the behavior of lithium become much less simple. Under high pressures, lithium undergoes a series of symmetry-breaking phase transitions, even a metal to insulator transition; at low temperatures, lithium also undergoes a temperature-driven martensitic transformation. In this work, these deviations from simple models in lithium are investigated, both at ambient pressure and under high pressures, from the relative high temperature phenomenon of melting to low temperature measurements of superconductivity

Social License to Operate: Hydraulic Fracturing-Related Challenges Facing the Oil & Gas Industry

The crossroads of urban development and improved technology allowing oil and gas development in new areas can result in contentious community issues. The debate over one of the improved technologies – i.e., hydraulic fracturing – can be highly emotional. Consequently, industry must address community issues, earning trust and therefore a “social license to operate.” This paper provides fundamental knowledge of the social license to operate concept, validates its application to the oil and gas industry, particularly with respect to shale gas development, discusses the current status of social license in the unconventional development sphere, analyzes current ongoing efforts for shale gas developers to monitor and establish a social license, and identifies potential new methods of encouraging, establishing, and monitoring a social license to operate. The paper also proposes a new institutional framework in which to promote the social license to operate, “The Center for Social License to Operate in the Oil & Gas Industry.

When Victims Refuse and Prosecutors Decline: Examining Exceptional Clearance in Sexual Assault Cases

This study examines the predictors of sexual assault case clearance, with a focus on arrest and two types of exceptional clearance: victim refusal to cooperate and prosecutorial declination to prosecute. Using National Incident Based Reporting System (NIBRS) data on crime incidents that contain a sexual offense (N = 21,977), we estimated a multinomial regression model to examine the predictors of different clearance types for cases of sexual assault. Results indicated that the likelihood of victim refusal decreases in cases perpetrated by strangers, involving victim injury, occurring in public, and involving multiple offenses. A similar pattern of findings was observed for the decision to decline to prosecute a case. In addition, prosecutors are more likely to decline to prosecute cases with male victims and older victims. We discuss the implications of our findings and directions for future research

Intimate partner violence and the overlap of perpetration and victimization: Considering the influence of physical, sexual, and emotional abuse in childhood

Using data from Wave 4 of the National Longitudinal Study of Adolescent to Adult Health, this study examined the independent relationship of childhood maltreatment type (emotional, sexual, physical) on IPV victimization and perpetration; then mutually exclusive categories of IPV involvement (victimization, perpetration, and victimization/perpetration) were investigated. IPV victimization and perpetration were assessed using items from the revised Conflict Tactics Scales. A series of binary regression models and multinomial regression models were estimated. Models were stratified across gender. Results uncovered significant relationships between child physical abuse and IPV victimization as well as IPV perpetration for males and females, but this effect was reduced when emotional maltreatment was added to the model. When IPV victimization/perpetration was considered, maltreatment effects changed. For males, physical maltreatment remained significantly related to victimization only and physical, sexual, and emotional maltreatment were related to victimization/perpetration. For females, physical maltreatment remained significantly related to IPV victimization only and emotional maltreatment was related to perpetration only and to victimization/perpetration. Screening and intervention for maltreatment, including emotional maltreatment, among children as well as adults with IPV histories may be important to preventing first IPV experiences and stemming current involvement

Rigor in the Multicultural Psychology of the Whole Person: Embracing the Challenge

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Exploring the views of dentists and dental support staff regarding multiple caries in children

This paper explores the reasons for multiple caries in children from the viewpoint of clinical practice, namely General Dental Practitioners (GDPs) and their teams, to identify obstacles to reducing inequalities in caries experience. The context of the research is the distribution of dental caries in UK communities where disease prevalence correlates with deprivation and these sub-groups are not attending for dental care on a regular basis. A focus group of dentists, along with individual interviews with dentists and dental support staff were chosen to explore the perceptions of GDPs, Dental Therapists, and Dental Nurses. The content analysis of the data highlighted six main themes. These included sugar, in terms of the amount, availability and the marketing of it; socioeconomic associations with dental caries experience; the dentists’ role; the National Health Service (NHS) dental contract in terms of time-constraints in meeting targets and finally, the management of the child with multiple caries. This research suggests that there are possible barriers to the delivery of equitable care to populations. These include availability and access to GDPs along with the perceptions held by GDPs. Training aimed to develop a targeted behavioural approach towards deprived sub-groups is required in order to avoid unintended social exclusion