Invasive alien plants have impacted southern U.S. forests. This study focuses on quantifying current distribution, rate of dispersals, and economic losses caused by four major invaders — Chinese tallow (Triadica sebifera (L.) Small), Chinese Privet (Ligustrum sinense Lour.), European Privet (Ligustrum vulgare L.), and Japanese Honeysuckle (Lonicera japonica Thunb.). Using data from USDA Forest Service’s Forest Inventory and Analysis (FIA), National Oceanic and Atmospheric Administration (NOAA), and USGS Land Use and Land Cover (LULC), I first used logistic regressions to build occupation models for these four species. Second, I used VB.NET© (Microsoft, 2003) and Environment System Research Institute (ESRI) Arc View® 9.2 Geographical Information System (GIS) to model spatially explicit dispersal dynamics of these species. Finally, I evaluated economic losses associated with these invasions. The results of occupation models showed that landscape features, climatic conditions, forest and site conditions, forest management activities and disturbances, and forest ownership have statistically significant impacts on current distributions of all four species. The results of dispersal models showed that invasions of Chinese tallow, Chinese and European privets, and Japanese honeysuckle will be likely to appear on approximately 6.65 million acres of forest land in East Texas and Louisiana, 3.81 million acres in Mississippi and Alabama, and 12.55 million acres in Mississippi and Alabama, respectively, during the next 20 years. The estimated timber losses resulting from the invasion with no control for the next 20 years at 5% discount rate is 518 million dollars for Chinese tallow, 2.72 billion dollars for Chinese and European privets, and 11.05 billion dollars for Japanese honeysuckle. From an economic point of view, it would be most cost effective to execute high intensity control for these invasive species. Based on these findings, strategies for monitoring and mitigating these invasive species are proposed.

The purpose of this phenomenological study was to understand the lived experience of adolescents who live with chronic pain. All 10 participants were between the ages of 13 and 17 and have lived with chronic pain for at least 6 months. Data sources for the study were two interviews for each participant, participant drawn depictions of their chronic pain, and researcher journaling. The person-environment-occupation model was used to frame the research design. The study found four main themes among the data: pain identity, invisible disease, occupational loss, and uphill climb to regain life. Each theme described the essence of the common experience of adolescents living with chronic pain. Occupational therapists can benefit from incorporating this knowledge base into their practice when providing intervention for individuals living with chronic pain to improve their overall quality of life and occupational performance.

Increasingly, disability related literature recognizes the environment as an important factor in the participation in roles and in engagement in activities for individuals with disabilities; which would naturally make the environment an important concern for occupational therapists (Hammel et al., 2015). The language and methods to describe and analyze the characteristics of the environment that support or limit client participation in occupations are not as well developed in occupational therapy (Whiteneck & Djickers, 2009). This is an important gap in our practice that must be addressed. Guided by Person-Environment-Occupation Theory (Baptiste, 2017), this project attempted to address this need by developing a typology of terms for contextual factors that affect participation. It was completed with the belief that providing the terminology will increase the attention provided to these factors in practice. Environmental interventions can be more universal, are often less expensive, and change the focus from the individual’s deficits to how society can be more just and inclusive. We created the typology using a scoping review methodology to identify source literature and by searching through the selected literature for the environmental and contextual terms describing factors that impact participation. The resulting typology is divided into four areas with twelve categories of terms and 54 total terms. It aligns with the International Classification of Function (WHO, 2001) and the performance factors in the Occupational Therapy Practice Framework (AOTA, 2014). The typology is designed and meant for use across OT practice areas, in OT education, research and scholarship. This will require wide spread dissemination. A dissemination plan based on Diffusion of Innovations Theory (Rogers ,2010) starts by refining the typology with the guidance of assessment from stakeholders. After this refinement process, the typology will be introduced via outreach to occupational therapy programs, publications, and conference presentations. Widely used, this typology has the potential to expand the scope of occupational therapy and to make our interventions more effective in improving and increasing participation for more people.

It has been observed that confusion exists in literature concerning the meaning and use of the term efficacy. Confusion is worsened by the use of the term as a general term describing agonist activity. The meaning of the terms intrinsic activity, efficacy and intrinsic efficacy as used in theoretical models of drug action was investigated. The classical occupation model, the two-state model, the ternary complex model (including conformational change and ideas surrounding G-proteins) and the operational model were studied in order to understand the historical and current usage of these terms. Although efficacy estimates are often reported as a molecular property, it was shown that agonist activity is tissue dependent and cannot be fully portrayed by an efficacy estimate. It was found that efficacy has a different definition in each model. This is not always recognized in literature. It was suggested that the term efficacy should only be used in the context of a specific model / Thesis (M.Sc. (Pharmacology))--North-West University, Potchefstroom Campus, 2007.

It has been observed that confusion exists in literature concerning the meaning and use of the term efficacy. Confusion is worsened by the use of the term as a general term describing agonist activity. The meaning of the terms intrinsic activity, efficacy and intrinsic efficacy as used in theoretical models of drug action was investigated. The classical occupation model, the two-state model, the ternary complex model (including conformational change and ideas surrounding G-proteins) and the operational model were studied in order to understand the historical and current usage of these terms. Although efficacy estimates are often reported as a molecular property, it was shown that agonist activity is tissue dependent and cannot be fully portrayed by an efficacy estimate. It was found that efficacy has a different definition in each model. This is not always recognized in literature. It was suggested that the term efficacy should only be used in the context of a specific model / Thesis (M.Sc. (Pharmacology))--North-West University, Potchefstroom Campus, 2007.