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ETD Embargos: Are There Discipline-Based Differences in Candidates' Selections?
No full textIt is frequently assumed that graduate students seeking to embargo their Electronic Theses and Dissertations (ETDs) are either scientists/engineers planning to patent their discoveries or liberal arts majors planning to publish their manuscripts in book form. A study has been undertaken to discover if the data available on embargo selection by degree candidates at a research university supports that assumption. Since embargo restricts access to valuable research, it is important that we have a better understanding of how it is being applied.
This poster compares selection of embargos by students in five divisions of the university—the colleges of agriculture, engineering, science and mathematics, liberal arts, and education. Embargo selection data will be compared for the academic years of 2009/2010 through 2014/2015.
Students submitting ETDs to the university repository have three embargo options: (1) no restriction, (2) access provided only to users with university credentials, and (3) global embargo. Previous research has shown the overall use of both option (2) and option (3) at this university has increased every year from 2009 through 2014. This study will show whether this trend has continued into 2015 and if the same trend is observed for all five colleges or if there are discipline-based differences.Presented at conferenc
Regime transition of ion Bernstein instability driven by ion shell velocity distributions
Get PDFLinear kinetic dispersion theory is used to investigate a regime transition of the ion Bernstein instability driven by a proton velocity distribution with positive slopes with respect to the perpendicular velocity, f(p)(v(vertical bar)approximate to 0,v)/v>0. The unstable waves arising from this instability are ion Bernstein waves with proton cyclotron harmonic dispersion. However, in the inner magnetosphere, particularly inside of the plasmapause where plasmas are dominated by a cold background, the instability leads to ion Bernstein waves which approximately follow the cold plasma dispersion relation for fast magnetosonic waves and are, therefore, fast magnetosonic-like. Subsequently, the relevant waves have been termed fast magnetosonic waves and many studies have assumed the cold plasma dispersion relation to describe them. On the other hand, how the dispersion properties of ion Bernstein waves become fast magnetosonic-like has not yet been well understood. To examine this regime transition of the instability, we perform linear dispersion analyses using a two-component proton model of f(p)(v) = f(M)(v) + f(s)(v), where f(M) is a Maxwellian velocity distribution and f(s) is an isotropic shell velocity distribution. The results show that the unstable waves are essentially ion Bernstein waves; however, when the shell proton concentration becomes sufficiently small (less than 10), the unstable waves approach the cold plasma dispersion relation for fast magnetosonic waves and become fast magnetosonic-like. Although a reduced proton-to-electron mass ratio of 100 has been used for convenience, which reduces the number of unstable modes involved by lowering the lower hybrid frequency, this does not change the overall regime transition picture revealed in this study.PublishedYe
Promoting a Juvenile Awards Approval Plan: Using Collaboration and Selected Projects for Improved Visibility and Findabilty to Promote Juvenile Collections in Academic Libraries
Get PDFThis article describes a project to promote an approval plan for purchasing award-winning juvenile books. The overall project utilizes a combination of projects for promoting awareness and use of the awards books and the juvenile collection in general. The promotion plan included collaborative work with teacher education faculty, projects to increase the visibility of the juvenile collection in the library, and projects to improve the findability of the juvenile books via the online catalog and an online subject guide. Initial assessment of the plan indicates some success with increased book circulation and increased use of the online guide.PublishedYe
Teaching Students the How and Why of Source Evaluation: Pedagogies that Empower Communities of Learning and Scholarship
Get PDFEvaluating information sources is an essential part of the research process, but many students fail to grasp its importance. In order to sustain and participate in the research practices that create new knowledge, students must learn to work purposefully with sources. This presentation highlights strategies and classroom activities that can be used to stimulate students’ critical thinking in relation to their information needs and the adequacy of sources to address these needs.N
To be seen and heard: Realizing the benefits of diversity and responding to the needs of minority academic librarians
No full textDiversity continues to be an important topic of conversation for librarians--we talk about the importance of representing a variety of viewpoints in our collections, providing diverse programs that meet the needs of a broad range of constituents, and investigating ways that we as a profession can better reflect the demographics of our changing communities. In many of these conversations, though, the need for diversity is taken as a given. But if our diversity efforts, especially those related to recruitment, are to be successful, we need to define what we mean by “diversity” and explicitly state the goals we hope to achieve by creating a more diverse workforce. The work of diversity does not end with hiring people from underrepresented groups; we will also need to invest time and energy in creating inclusive environments, those in which differences are seen as strengths to be taken advantage of rather than difficulties to be overcome or avoided. In creating these more inclusive environments, we will need to identify the varying needs of librarians from diverse backgrounds. Listening to these voices--voices that are often marginalized--and addressing the concerns raised will allow us as individuals to work more productively together, thus creating a stronger profession
A Solution of Rigid Perfectly Plastic Deep Spherical Indentation based on Slip Line Theory
Get PDFDuring indentation it is often important to determine the relationship between the average pressure and the yield strength. This work uses slip line theory to determine this relationship for the case of a rigid sphere indenting a frictionless perfectly plastic half-space (i.e. no hardening). The results show that the ratio between the average contact pressure and the yield strength decreases as the depth of indentation is increased. Note that the slip-line analysis does not include the effects of pile-up or sink-in deformations. However, the slip-line theory has also been compared to data generated using the finite element method (FEM). The theory and the FEM results appear to agree well.Submitte
The Vascular Flora of the Red Hills Forever Wild Tract, Monroe County, Alabama
Get PDFThe Red Hills Forever Wild Tract (RHFWT) is a 1785 ha property that was acquired in two purchases by the State of
Alabama Forever Wild Program in February and September 2010. The RHFWT is characterized by undulating
terrain with steep slopes, loblolly pine plantations, and mixed hardwood floodplain forests. The property lies 125 km southwest of Montgomery, AL and is managed by the Alabama Department of Conservation and Natural Resources with an emphasis on recreational use and habitat management. An intensive floristic study of this area was conducted from January 2011 through June 2015. A total of 533 taxa (527 species) from 323 genera and 120 families were collected with 148 taxa being county records. Asteraceae was the most collected family with 71 species.
Poaceae and Fabaceae were the next largest families with 48 and 45 species, respectively. Quercus was the largest
genus, represented by 12 species and one named hybrid. Fifty-nine non-native species were collected during the
surveys. Plant collections were deposited at the Alabama Natural Heritage Section Herbarium (ALNHS), with duplicates deposited at the Anniston Museum of Natural History Herbarium (AMAL), Jacksonville State University
(JSU), and Auburn University Herbarium (AUA).PublishedYe
Chesapeake Bay nitrogen fluxes derived from a land-estuarine ocean biogeochemical modeling system: Model description, evaluation, and nitrogen budgets
Get PDFThe Chesapeake Bay plays an important role in transforming riverine nutrients before they are exported to the adjacent continental shelf. Although the mean nitrogen budget of the Chesapeake Bay has been previously estimated from observations, uncertainties associated with interannually varying hydrological conditions remain. In this study, a land-estuarine-ocean biogeochemical modeling system is developed to quantify Chesapeake riverine nitrogen inputs, within-estuary nitrogen transformation processes and the ultimate export of nitrogen to the coastal ocean. Model skill was evaluated using extensive in situ and satellite-derived data, and a simulation using environmental conditions for 2001-2005 was conducted to quantify the Chesapeake Bay nitrogen budget. The 5 year simulation was characterized by large riverine inputs of nitrogen (154 x 10(9) g N yr(-1)) split roughly 60: 40 between inorganic: organic components. Much of this was denitrified (34 x 10(9) g N yr(-1)) and buried (46 x 10(9) g N yr(-1)) within the estuarine system. A positive net annual ecosystem production for the bay further contributed to a large advective export of organic nitrogen to the shelf (91 x 10(9) g N yr(-1)) and negligible inorganic nitrogen export. Interannual variability was strong, particularly for the riverine nitrogen fluxes. In years with higher than average riverine nitrogen inputs, most of this excess nitrogen (50-60%) was exported from the bay as organic nitrogen, with the remaining split between burial, denitrification, and inorganic export to the coastal ocean. In comparison to previous simulations using generic shelf biogeochemical model formulations inside the estuary, the estuarine biogeochemical model described here produced more realistic and significantly greater exports of organic nitrogen and lower exports of inorganic nitrogen to the shelf.PublishedYe
Are we underestimating the genetic variances of dimorphic traits?
Get PDFPopulations often contain discrete classes or morphs (e.g., sexual dimorphisms, wing dimorphisms, trophic dimorphisms) characterized by distinct patterns of trait expression. In quantitative genetic analyses, the different morphs can be considered as different environments within which traits are expressed. Genetic variances and covariances can then be estimated independently for each morph or in a combined analysis. In the latter case, morphs can be considered as separate environments in a bivariate analysis or entered as fixed effects in a univariate analysis. Although a common approach, we demonstrate that the latter produces downwardly biased estimates of additive genetic variance and heritability unless the quantitative genetic architecture of the traits concerned is perfectly correlated between the morphs. This result is derived for four widely used quantitative genetic variance partitioning methods. Given that theory predicts the evolution of genotype-by-environment (morph) interactions as a consequence of selection favoring different trait combinations in each morph, we argue that perfect correlations between the genetic architectures of the different morphs are unlikely. A sampling of the recent literature indicates that the majority of researchers studying traits expressed in different morphs recognize this and do estimate morph-specific quantitative genetic architecture. However, ca. 16% of the studies in our sample utilized only univariate, fixed-effects models. We caution against this approach and recommend that it be used only if supported by evidence that the genetic architectures of the different morphs do not differ.PublishedYe
Simulation studies of a recorder in three dimensions
Get PDFThe aeroacoustics of a recorder are explored using a direct numerical simulation based on the Navier–Stokes equations in three dimensions. The qualitative behavior is studied using spatial maps of the air pressure and velocity to give a detailed picture of jet dynamics and vortex shedding near the labium. In certain cases, subtle but perhaps important differences in the motion of the air jet near the edge of the channel as compared to the channel center are observed. These differences may be important when analyzing experimental visualizations of jet motion. The quantitative behavior is studied through analysis of the spectrum of the sound pressure outside the instrument. The effect of chamfers and of changes in the position of the labium relative to the channel on the tonal properties are explored and found to be especially important in the attack portion of the tone. Changes in the spectrum as a result of variations in the blowing speed are also investigated as well as the behavior of the spectrum when the dominant spectral component switches from the fundamental to the second harmonic mode of the resonator tube