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Institution

University of Georgia

EducationAthens, Georgia, United States
About: University of Georgia is a education organization based out in Athens, Georgia, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 41934 authors who have published 93622 publications receiving 3713212 citations. The organization is also known as: UGA & Franklin College.
Topics: Population, Poison control, Gene, Genome, Virus


Papers
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Journal ArticleDOI
TL;DR: In temperate ocean surface waters and estuarine waters, growth and respiration may be increased experimentally either by raising the temperature or by increasing organic substrate concentrations, providing indirect evidence that the lim- itation is an effect of temperature on substrate uptake or assimilation.
Abstract: Active heterotrophic bacterial communities exist in all marine environments, and although their growth rates or respiratory rates may be limited by the interaction of low substrate concentrations with temperatures near their lower limit for growth, temperature and substrate con- centrations are rarely considered together as limiting factors. Moreover, attempts to evaluate meta- bolic limits by both temperature and substrate concentration have sometimes led to confusing con- clusions, because, while we can measure dissolved organic carbon (DOC) concentrations in natural waters, much of it is not readily available to heterotrophic bacteria. In spite of this procedural limita- tion, it can be helpful to regard temperature and substrate concentration as potential limiting factors that interact. In temperate ocean surface waters and estuarine waters, where bacterial growth is often reduced in winter, growth and respiration may be increased experimentally either by raising the tem- perature or by increasing organic substrate concentrations, providing indirect evidence that the lim- itation is an effect of temperature on substrate uptake or assimilation. Experimental work with bac- terial isolates also has shown a temperature-substrate interaction. In permanently cold polar waters, most heterotrophic bacteria appear to be living at temperatures well below their optima for growth. Nevertheless, bacteria in permanently cold surface waters can achieve activity rates in summer that are as high as those in temperate waters. In sea ice, rates of bacterial production are most often low, even though concentrations of substrates, including free amino acids, are sometimes much higher than they are in seawater. This suggests that at sea ice temperatures heterotrophic bacteria have low- ered ability to take up or utilize organic substrates.

574 citations

Proceedings ArticleDOI
17 May 2004
TL;DR: MWSAF (METEOR-S Web Service Annotation Framework), a framework for semi-automatically marking up Web service descriptions with ontologies, which has developed algorithms to match and annotate WSDL files with relevant ontologies.
Abstract: The World Wide Web is emerging not only as an infrastructure for data, but also for a broader variety of resources that are increasingly being made available as Web services. Relevant current standards like UDDI, WSDL, and SOAP are in their fledgling years and form the basis of making Web services a workable and broadly adopted technology. However, realizing the fuller scope of the promise of Web services and associated service oriented architecture will requite further technological advances in the areas of service interoperation, service discovery, service composition, and process orchestration. Semantics, especially as supported by the use of ontologies, and related Semantic Web technologies, are likely to provide better qualitative and scalable solutions to these requirements. Just as semantic annotation of data in the Semantic Web is the first critical step to better search, integration and analytics over heterogeneous data, semantic annotation of Web services is an equally critical first step to achieving the above promise. Our approach is to work with existing Web services technologies and combine them with ideas from the Semantic Web to create a better framework for Web service discovery and composition. In this paper we present MWSAF (METEOR-S Web Service Annotation Framework), a framework for semi-automatically marking up Web service descriptions with ontologies. We have developed algorithms to match and annotate WSDL files with relevant ontologies. We use domain ontologies to categorize Web services into domains. An empirical study of our approach is presented to help evaluate its performance.

573 citations

Journal ArticleDOI
TL;DR: A new model for interpreting GSS effects on performance (a Fit-Appropriation Model) is developed, which argues that GSS performance is affected by two factors: the fit between the task and the GSS structures selected for use and the appropriation support the group receives in the form of training, facilitation, and software restrictiveness.
Abstract: Many previous papers have lamented the fact that the findings of past GSS research have been inconsistent. This paper develops a new model for interpreting GSS effects on performance (a Fit-Appropriation Model), which argues that GSS performance is affected by two factors. The first is the fit between the task and the GSS structures selected for use (i.e., communication support and information processing support). The second is the appropriation support the group receives in the form of training, facilitation, and software restrictiveness to help them effectively incorporate the selected GSS structures into their meeting process. A meta-analysis using this model to organize and classify past research found that when used appropriately (i.e., there is a fit between the GSS structures and the task, and the group receives appropriation support), GSS use increased the number of ideas generated, took less time, and led to more satisfied participants than if the group worked without the GSS. Fitting the GSS to the task had the most impact on outcome effectiveness (decision quality and ideas), while appropriation support had the most impact on the process (time required and process satisfaction). We conclude that when using this theoretical lens, the results of GSS research do not appear inconsistent.

571 citations

Book
01 Jan 2012
TL;DR: This volume demonstrates how rigorous and relevant investigation can yield both theoretical understanding and solutions to urgent educational problems as well as recommending recommendations for proposing, reporting and advancing educational design research.
Abstract: Educational design research blends scientific investigation with systematic development and implementation of solutions to educational problems. Empirical investigation is conducted in real learning settings-not laboratories-to craft usable and effective solutions. At the same time, the research is carefully structured to produce theoretical understanding that can serve the work of others. To support graduate students as well as experienced researchers who are new to this approach, Conducting Educational Design Research integrates multiple perspectives of educational design research throughout this three-part book. Part one clarifies the educational design research origins, approach and outcomes. It also presents a generic model portraying the overall process. Part two discusses the constituent elements of the model in detail, these are: analysis and exploration; design and construction; evaluation and reflection; and implementation and spread. Part three offers recommendations for proposing, reporting and advancing educational design research. Through related readings and richly varied examples, Conducting Educational Design Research offers clear and well-documented guidance on how to conceptualize and conduct this stimulating form of inquiry. For decades, policies for educational research worldwide have swung back and forth between demanding rigor above all other concerns, and increasing emphasis on impact. These two qualities need not be mutually exclusive. This volume supports readers in grasping and realizing the potential of educational design research. It demonstrates how rigorous and relevant investigation can yield both theoretical understanding and solutions to urgent educational problems.

570 citations

Journal ArticleDOI
TL;DR: During growth in CO(2)-enriched air, leaf rubisco content remains in excess of that required to support the observed photosynthetic rates, indicating that a limitation on photosynthesis by the capacity to regenerate orthophosphate was reduced or absent after acclimation to highCO(2).
Abstract: The effect of long-term (weeks to months) CO(2) enhancement on (a) the gas-exchange characteristics, (b) the content and activation state of ribulose-1,5-bisphosphate carboxylase (rubisco), and (c) leaf nitrogen, chlorophyll, and dry weight per area were studied in five C(3) species (Chenopodium album, Phaseolus vulgaris, Solanum tuberosum, Solanum melongena, and Brassica oleracea) grown at CO(2) partial pressures of 300 or 900 to 1000 microbars. Long-term exposure to elevated CO(2) affected the CO(2) response of photosynthesis in one of three ways: (a) the initial slope of the CO(2) response was unaffected, but the photosynthetic rate at high CO(2) increased (S. tuberosum); (b) the initial slope decreased but the CO(2)-saturated rate of photosynthesis was little affected (C. album, P. vulgaris); (c) both the initial slope and the CO(2)-saturated rate of photosynthesis decreased (B. oleracea, S. melongena). In all five species, growth at high CO(2) increased the extent to which photosynthesis was stimulated following a decrease in the partial pressure of O(2) or an increase in measurement CO(2) above 600 microbars. This stimulation indicates that a limitation on photosynthesis by the capacity to regenerate orthophosphate was reduced or absent after acclimation to high CO(2). Leaf nitrogen per area either increased (S. tuberosum, S. melongena) or was little changed by CO(2) enhancement. The content of rubisco was lower in only two of the five species, yet its activation state was 19% to 48% lower in all five species following long-term exposure to high CO(2). These results indicate that during growth in CO(2)-enriched air, leaf rubisco content remains in excess of that required to support the observed photosynthetic rates.

570 citations


Authors

Showing all 42268 results

NameH-indexPapersCitations
Rob Knight2011061253207
Feng Zhang1721278181865
Zhenan Bao169865106571
Carl W. Cotman165809105323
Yoshio Bando147123480883
Mark Raymond Adams1471187135038
Han Zhang13097058863
Dmitri Golberg129102461788
Godfrey D. Pearlson12874058845
Douglas E. Soltis12761267161
Richard A. Dixon12660371424
Ajit Varki12454258772
Keith A. Johnson12079851034
Gustavo E. Scuseria12065895195
Julian I. Schroeder12031550323
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023125
2022542
20214,670
20204,504
20194,098
20183,994