Institution
Georgia College & State University
Education•Milledgeville, Georgia, United States•
About: Georgia College & State University is a education organization based out in Milledgeville, Georgia, United States. It is known for research contribution in the topics: Population & Higher education. The organization has 950 authors who have published 1591 publications receiving 37027 citations.
Papers published on a yearly basis
Papers
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TL;DR: The authors describes a service learning project implemented mid-semester in response to the September 11, 2001, attacks, where students developed and implemented a community-wide effort to collect care packages for U.S. troops deployed to Afghanistan.
Abstract: This article describes a service learning project implemented midsemester in response to the September 11, 2001, attacks. The project applied course topics while allowing students to positively channel their anxiety. Students developed and implemented a community-wide effort to collect care packages for U.S. troops deployed to Afghanistan. The article presents the project’s evolution, successes, and problems. The pros and cons of service learning through changing a course midsemester are also discussed. This project description may be instructive to readers who are contemplating service learning class projects. It should also be of interest to instructors who sense the need to change a course midsemester.
9 citations
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20 Jun 2011TL;DR: A separation of concern into requirements engineering, model development and conceptualisation is the starting point for this paper.
Abstract: Models, modelling languages, modelling frameworks and their background have dominated conceptual modelling research and information systems engineering for last four decades. Conceptual models are mediators between the application world and the implementation or system world. Design science distinguishes the relevance cycle as the iterative process that re-inspects the application and the model, the design cycle as the iterative model development process, and the rigor cycle that aims in grounding and adding concepts developed to the knowledge base. This separation of concern into requirements engineering, model development and conceptualisation is the starting point for this paper.
9 citations
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TL;DR: Results imply that differences in dietary breadth contribute more to the structural and regulatory differentiation of venoms than differences in diet, and if expanded niche breadth is associated with increased variation in venom composition.
Abstract: Species interactions are fundamental ecological forces that can have significant impacts on the evolutionary trajectories of species. Nonetheless, the contribution of predator-prey interactions to genetic and phenotypic divergence remains largely unknown. Predatory marine snails of the family Conidae exhibit specializations for different prey items and intraspecific variation in prey utilization patterns at geographic scales. Because cone snails utilize venom to capture prey and venom peptides are direct gene products, it is feasible to examine the evolution of genes associated with changes in resource utilization. Here, we compared feeding ecologies and venom duct transcriptomes of individuals from three populations of Conus miliaris, a species that exhibits geographic variation in prey utilization and dietary breadth, in order to determine the extent to which dietary differences are correlated with differences in venom composition, and if expanded niche breadth is associated with increased variation in venom composition. While populations showed little to no overlap in resource utilization, taxonomic richness of prey was greatest at Easter Island. Changes in dietary breadth were associated with differences in expression patterns and increased genetic differentiation of toxin-related genes. The Easter Island population also exhibited greater diversity of toxin-related transcripts, but did not show increased variance in expression of these transcripts. These results imply that differences in dietary breadth contribute more to the structural and regulatory differentiation of venoms than differences in diet.
9 citations
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TL;DR: There was no evidence of a trophic cascade either in terms of leaf damage or tree growth, and more variation in arthropod density among trees within sites than variation inArthropoddensity among sites, indicating the importance of micro-site variation in structuring Arthropod communities.
Abstract: Predation pressure and resource availability often interact in structuring herbivore communities, with their relative influence varying in space and time. The operation of multiple ecological pressures and guild-specific herbivore responses may combine to override simple predictions of how the roles of plant quality and predation pressure vary in space. For 2 years at the Coweeta LTER in the Southern Appalachian Mountains, we conducted a bird exclosure experiment on red oak (Quercus rubra) saplings to investigate the effects of bird predation on red oak arthropod communities. We established bird exclosures at six sites along an elevational gradient and estimated variation in foliar nitrogen and bird predation pressure along this gradient. Foliar nitrogen concentrations increased with elevation while our index of bird predation pressure was variable across sites. Greater arthropod densities were detected inside exclosures; however, this result was mainly driven by the response of phloem feeders which were much more prevalent inside exclosures than on control trees. There was little evidence for an effect of bird predation on the other arthropod guilds. Consequently, there was no evidence of a trophic cascade either in terms of leaf damage or tree growth. Finally, we found more variation in arthropod density among trees within sites than variation in arthropod density among sites, indicating the importance of micro-site variation in structuring arthropod communities.
9 citations
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TL;DR: In this paper, the authors derived new chemical profiles for the core and envelope of white dwarfs appropriate for pulsational studies of ZZ Ceti stars from the complete evolution of progenitor stars, evolved through the main sequence and the thermally-pulsing asymptotic giant branch (AGB) stages.
Abstract: We compute new chemical profiles for the core and envelope of white dwarfs appropriate for pulsational studies of ZZ Ceti stars. These profiles are extracted from the complete evolution of progenitor stars, evolved through the main sequence and the thermally-pulsing asymptotic giant branch (AGB) stages, and from time-dependent element diffusion during white dwarf evolution. We discuss the importance of the initial-final mass relationship for the white dwarf carbon-oxygen composition. In particular, we find that the central oxygen abundance may be underestimated by about 15% if the white dwarf mass is assumed to be the hydrogen-free core mass before the first thermal pulse. We also discuss the importance for the chemical profiles expected in the outermost layers of ZZ Ceti stars of the computation of the thermally-pulsing AGB phase and of the phase in which element diffusion is relevant. We find a strong dependence of the outer layer chemical stratification on the stellar mass. In particular, in the less massive models, the double-layered structure in the helium layer built up during the thermally-pulsing AGB phase is not removed by diffusion by the time the ZZ Ceti stage is reached. Finally, we perform adiabatic pulsation calculations and discuss the implications of our new chemical profiles for the pulsational properties of ZZ Ceti stars. We find that the whole $g-$mode period spectrum and the mode-trapping properties of these pulsating white dwarfs as derived from our new chemical profiles are substantially different from those based on chemical profiles widely used in existing asteroseismological studies. Thus, we expect the asteroseismological models derived from our chemical profiles to be significantly different from those found thus far.
9 citations
Authors
Showing all 957 results
Name | H-index | Papers | Citations |
---|---|---|---|
Gene H. Brody | 93 | 418 | 27515 |
Mark D. Hunter | 56 | 173 | 10921 |
James E. Payne | 52 | 201 | 12824 |
Arash Bodaghee | 30 | 122 | 2729 |
Derek H. Alderman | 29 | 121 | 3281 |
Christian Kuehn | 25 | 206 | 3233 |
Ashok N. Hegde | 25 | 48 | 2907 |
Stephen Olejnik | 25 | 67 | 4677 |
Timothy A. Brusseau | 23 | 139 | 1734 |
Arne Dietrich | 21 | 44 | 3510 |
Douglas M. Walker | 21 | 76 | 2389 |
Agnès Bischoff-Kim | 21 | 46 | 885 |
Uma M. Singh | 20 | 40 | 1829 |
David Weese | 20 | 46 | 1920 |
Angeline G. Close | 20 | 35 | 1718 |