Few studies have considered in detail the ethical issues surrounding research in which investigators ask community members to engage in research subject recruitment within their own communities. Peer-driven recruitment (PDR) and its variants are useful for accessing and including certain populations in research, but also have the potential to undermine the ethical and scientific integrity of community-based research. This paper examines the ethical implications of utilizing community members as recruiters of human subjects in the context of PDR, as well as the authors' experience with a variant of PDR in a research project in South Africa. The importance of situating PDR in a comprehensive community engagement process that is responsive to the constraints of science and local needs and interests is emphasized. The paper will have relevance to bioethicists, health researchers, and research regulators concerned about the appropriate use of peer-driven recruitment strategies in health research.

Suppression of canopy tree recruitment beneath rapidly spreading thickets of Rhododendron maximum L. (Ericaceae) in southern Appalachian forests is an issue of major concern because of the potential impacts on forest productivity, hydrology and wildlife habitat. Many studies have investigated the causes of seedling inhibition beneath dense shrub understories, but few have uncovered specific mechanisms leading to seedling decline. In this study, I have examined the influence of the evergreen understory (R. maximum and Kalmia latifolia L.) on tree recruitment processes at multiple stages - seed rain, seed bank, and post-establishment seedling growth and survivorship. Effects of dense shrub cover on seed rain and seed bank density and composition were examined using a paired treatment design in which samples were collected beneath shrub-influenced and open understories. A second experiment investigated the influence of R. maximum and K. latifolia density on the growth and survivorship of Quercus seedlings, resource availability, and the rates / causes of seedling damage. I found that neither seed rain, nor seed bank density or species richness was inhibited by the presence of R. maximum or K. latifolia. Forest seed banks were dominated by sweet birch (Betula lenta L.), and were compositionally disparate from the overstory. Analysis of resource competition between shrubs and seedlings indicated that seedling performance and survivorship was a negative function of R. maximum density. Open-canopy light availability, nitrogen content in the organic horizon (litter and humus), and soil nutrient availability were potential resource-related mechanisms. Further, I found that the rates of insect herbivory on Quercus seedlings were positively correlated with R. maximum density. Kalmia latifolia had little influence on resource availability, seedling performance or herbivory rates, and does not appear to have a suppressive effect on tree seedlings. Overall, this research indicates that resource competition is the primary mechanism by which seedling suppression occurs beneath R. maximum, and that increased herbivory on seedlings may be an additional mechanism that demands further study. / Master of Science

The purpose of this study was to enhance understanding of leisure experiences by applying an organizational approach to the sociology of leisure. This organizational approach, used mainly to study work and occupations, consists of a conceptual framework derived from social systems theory and structural functionalism. The sensitizing concepts used from this framework were recruitment, socialization, and identity. In this study, I focused on the leisure group of clog dancers. My research questions, derived from this approach, include (1) How do clogging groups recruit their members? (2) How are people socialized into their role as cloggers and group members? (3) Do cloggers form a special identity because of this activity? Twenty cloggers were interviewed for this study. All of the dancers were white, and all but one were female. Most of the dancers were married, and their ages ranged from 20 to 69 years. All of the dancers have clogged for at least four years, and half of the dancers have been clogging for 10 or more years. Their educational levels covered a wide spectrum, from less than high school to Master's degrees. Occupational status and income level also varied widely. Through concept-driven interviews, the dancers indicated what they believed were important aspects of their leisure experiences. A majority of the dancers stated that they were recruited through social networks or by media influence. They experienced both formal and informal socialization in learning dance steps and how to perform as a team player in front of an audience. Finally, the dancers believed that they held a special identity because of their talents as a clogger. While each dancer derived different meanings from his/her identity as clogger, this identity appeared to be salient and psychologically central for all of the dancers interviewed. / Master of Science

This paper is a qualitative study written with an assignment description done in collaboration with the global home furnishing retailer organisation; the IKEA Group. The assignment information has worked as the foundation when constructing this paper. This paper contributes with analyses and discussions about the relationship between recruitment and inclusion. The research method was semi-structured interviews and these serve as the primary data for analysis and discussion. In this paper, inclusion is a part of sustainability, more specific social sustainability. The results from this paper show that there are several factors that can enable and optimise inclusion in a recruitment process. One way to promote inclusion can be achieved through the implementation and usage of digital tools and digital solutions in the recruitment process. To implement and use digital tools and digital solutions in the recruitment process. However, in order to enhance inclusiveness, the employee’s awareness and knowledge about inclusion and diversity on the workplace needs to be fostered.

The composition, recruitment rates and fine-scale spatial dynamics of the sessile benthic community occupying hard substrata off Lee Stocking Island, The Bahamas, was determined through photography and the deployment of artificial substrata from September 1993 to September 1996. The study spanned 10 to 250 meters in depth. The benthic community exhibited a pronounced bathymetric zonation. Filamentous and macroalgae dominated the shallow communities , but were replaced by corals, sponges and endolithic algae with increasing depth. Living cover was high above 100 m, but declined significantly below this depth, being replaced by increasing amounts of bare and sediment-covered rock surfaces. Benthic zonation was shifted downward with respect to other locations in the western Atlantic, possibly due to the clear waters of Exuma Sound allowing relatively deep light penetration. Recruitment experiments were deployed during two time inten :als from 1994 to 1995. The experiments enabled the analysis of the effects of five treatments which differed in depth, orientation and degree of exposure. Recruitment of all sessile taxa declined sharply with depth. Peak recruitment for most taxa occurred between 20 m and 50 m. Recruitment experiments retrieved from sites located above 50 m exhibited high cover of :filamentous and macroalgae on exposed surfaces. Sponges, corals and other invertebrates dominated the cryptic surfaces. Dominance by polychaetes characterized the deeper sites. Fine-scale changes in community structure were determined through repeat photography of natural substrata and artificial settling panels. Numerical change indices were generated for changes in cover and additions and losses of individual organisms occurring over time. Each change index began at a relatively low value at the 10 m depth, increased to a maximum value at 30 m or 50 m and then declined with increasing depth. Numbers of fish grazing scars were positively correlated with the loss index and negatively correlated \\ith algal cover, suggesting that fish contribute to fine-scale changes in the sessile community. Important contributors to fine-scale spatial changes within the benthic community shift from algae to corals to sponges with increasing depth.

Millard County, Utah, rural and sparsely populated, continues to experience challenges in recruiting and retaining primary health care providers. My study addressed the lack of a rigorous and systemic analysis of this problem by collecting and analyzing data from a series of semi-structured interviews conducted between January and March 2019. These interviews were with nineteen of the twenty-four known health care providers who began practice in the county from the mid1980s to 2018, as well as with four administrators. The study, taking advantage of this comprehensive analysis, provided a more extensive understanding of the root causes underlying the recruitment and retention shortcomings. Findings showed that decisions to stop practice in the county were not typically made for a single over-riding reason but occurred when the cumulative effect of negative experiences reached a tipping point, prompting the provider to seek another practice venue. Providers who left reached this tipping point in spite of most having a rural background. The study recommended implementing a comprehensive and on-going support program aimed at addressing providers concerns. The stressors associated with rural health care practices need to be regularly assessed and resolved in a timely fashion.

Understanding regulation of wild animal populations is important in ecological investigations and applied wildlife management. Progress in understanding regulatory processes has been hindered by a long-running debate over the role of density-dependent and density-independent variables in population regulation. Population regulation of exploited species is of particular interest because harvest theory is predicated on assumptions of density-dependent feedback. However, for many exploited species, the functional relationships and mechanisms of population regulation via density dependence are not quantified (e.g., Northern bobwhite (Colinus virginianus). Compounding this task is the lack of a mechanistic understanding of the influence of density-independent factors in population regulation. The overall goal of this dissertation is to investigate the roles of density-dependent and density-independent processes in bobwhite populations. Bobwhites are an excellent species to investigate the role and influence of density-dependent and density-independent factors due to their unique life history, wherein they can exhibit density dependence in survival, reproduction, or both. I provide support for the concomitant influence of density-dependent and density-independent processes operating to regulate bobwhite populations. My results support the importance of food and cover and the additive influence of density-dependent and density-independent factors on bobwhite annual survival. I also report evidence for the differential effects of covariates on survival phases. My results represent the first evidence of support for the Tub and Tap hypotheses on bobwhite survival. I also quantify a density-dependent effect on bobwhite recruitment. Collectively, these results provide new evidence for understanding the role of internal and external factors in bobwhite populations.

Reservoirs throughout the country exhibit degraded shorelines and simplified littoral habitats because of aging. This study evaluated the establishment of agricultural plantings on reservoir mudflats and the effectiveness of supplemental brush pile structures in providing recruitment habitat for juvenile fish. The mudflats of Enid Reservoir, Mississippi were seeded during the winter drawdown in October of 2016 and 2017 with agricultural plantings. Monitoring of plantings found grasses performed best in terms of establishment and providing potential fish habitat. During Summer 2017 brush piles and control sites, without brush, were sampled in Enid Reservoir using rotenone to evaluate juvenile fish use. Juvenile fish exhibited greater abundances and larger sizes, on average, in brush pile sites. Larger brush piles placed in shallower water provided the greatest benefit to juvenile fish.

Productivity, diversity and survival of estuaries are threatened by explosive coastal population growth and associated recreational activities. One major area of recreational growth has been the number of small pleasure craft motoring in shallow waters at high speeds. On the east coast of Central Florida in the Indian River Lagoon system, intense boating activity occurs year-round and intertidal reefs of the eastern oyster Crassostrea virginica with dead margins (piles of disarticulated shells) on their seaward edges are commonly found adjacent to major boating channels. The cause(s) of the dead margins is unclear. However, the disarticulated shells may be reducing reef sustainability if these surfaces are unavailable for larvae. Recruitment trials were run on eight reefs (4 with dead margins, 4 without) in three 8-week trials in 2001/2002. Significant differences were found for location on reef and season. For survival of recruits, significant differences were found for reef type, location on reef, and season. Sediment loads, percent silt/clay, and relative water motion were all found to be significantly higher on impacted reefs. Spring months were found to be the optimal time for larval recruitment to increase larval set and survival and to also decrease the effects of sedimentation and water motion. Based on these results, experimental restoration began May 2003 to develop an ecologically and economically feasible restoration protocol for this intertidal region. Four different densities of shells (0, 16, 25, 36) were attached to vexar mesh mats (45 X 45 cm) displaying shells perpendicular to the substrate. 360 mats were randomly deployed at one of six dentified optimum recruitment locations. Recruitment increased through June and was significantly higher on mats with 36 shells. This was followed by a large, expected decline in recruitment and survival in July/August, due to competition, predation and/or extreme high temperatures. Total live oysters on the restoration mats significantly increased during October 2003 through February 2003. These newly-created oyster reefs are moveable and provide optimal substrate and larval set to be transported post-recruitment to areas resource managers have slated for restoration to aid in reef sustainability. To determine the potential negative effects of flow and sediment levels on oyster larval settlement, which may be associated with an increase in boating actitivity, laboratory experiments were conducted. Eighteen trials, with competent oyster larvae, nine in flowing-water and nine in still-water were run at three sediment levels: no sediment, low sediment, and high sediment loads. Larval settlement was significantly higher in the still-water trials and both high and low sediment loads significantly reduced larval settlement.

Immune recruiters are small molecule immunotherapeutics which redirect endogenous components of the immune system to target cells to elicit anti-cancer responses. Current immune recruiters made in the Rullo Lab are heterobispecific molecules which bind receptors on cancer cells and ligand-specific antibodies. Upon antibody binding, a proximity-induced covalent reaction with nearby nucleophilic residues installs a targeting ligand onto the protein. The resultant antibody conjugate then facilitates cancer killing through immune cell recruitment. Covalency circumvents limited binding affinity of the ligand•antibody complex, however antibody•immune receptor affinity remains an issue. This thesis presents an alternative immune recruiting strategy through direct engagement of effector immune cells; monocyte covalent immune recruiters (mCIRs). mCIRs utilize a monocyte specific peptide (cp33) to bind CD64, an activating receptor on monocytes. By incorporating a sulfonyl fluoride electrophile onto the N-terminus of cp33, selective covalent labelling of CD64 was achieved within 24 h. Furthermore, mCIRs demonstrated enhanced monocyte function relative to antibody recruiting platforms. However, these constructs have demonstrated that the order of addition to the target receptor then to CD64 is critical for bridging the two species. As a result, the effect of covalency on complex simplification and monocyte function has yet to be determined. Despite this, mCIRs represent a covalent immune recruitment strategy with the potential to address shortcomings of antibody-based therapeutics. / Thesis / Master of Science (MSc)