1,720,955 research outputs found
Implications of floodplain dynamics for reservoir operation
Get PDFDrought and flood events cause billions of dollars of economic damages in the United States and other countries every year. To alleviate both types of disaster, reservoirs regulate inflow, decreasing downstream variability. However, one blind spot in current reservoir operation, specifically considering flood and drought management, is the impacts of current operation on the demands which operation is subject to in the future. Reservoirs are operated considering event and seasonal scales but influences processes, such as socioeconomic development, that occur over much longer time scales and in turn feedback to influence reservoir decisions. Recent and ongoing progress in understanding coupled social-hydrological systems provides a path to begin pro-actively managing reservoirs considering socio-economic dynamics. We develop a proof-of-concept model for feedbacks between reservoir operation and floodplain development, a specific case of socio-economic feedbacks, and discuss its potential implications for reservoir management.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-12-01The student, Kevin Wallington, accepted the attached license on 2018-12-12 at 13:40.The student, Kevin Wallington, submitted this Thesis for approval on 2018-12-12 at 13:46.This Thesis was approved for publication on 2018-12-12 at 16:42.DSpace SAF Submission Ingestion Package generated from Vireo submission #13304 on 2019-02-08 at 11:42:04Made available in DSpace on 2019-02-08T18:44:45Z (GMT). No. of bitstreams: 3
WALLINGTON-THESIS-2018.pdf: 2211484 bytes, checksum: ff9461d742396d7f081f283cd718b28d (MD5)
Thesis Final Draft.docx: 4720292 bytes, checksum: 1095eeac75f0c5842360a6d58a68f51f (MD5)
LICENSE.txt: 4213 bytes, checksum: 05a22085cc6b9e1ff3979d3adfee3b97 (MD5)
Previous issue date: 2018-12-12Embargo set by: Seth Robbins for item 109990
Lift date: 2021-02-08T18:44:50Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 109990 on 2021-02-09T10:15:30Z
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Improving phosphorus management through coordinated watershed modelling and systems analysis
Get PDFSubmission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01The student, Kevin Wallington, accepted the attached license on 2023-09-22 at 00:43.The student, Kevin Wallington, submitted this Dissertation for approval on 2023-09-22 at 00:51.This Dissertation was approved for publication on 2023-10-06 at 14:31.DSpace SAF Submission Ingestion Package generated from Vireo submission #19835 on 2024-03-01 at 13:47:53Phosphorus (P) management is a challenging problem bridging energy, agricultural, and environmental sectors. While P fertilizer has been critical to achieving high crop yields, P fertilizer runoff and P discharge from agricultural processing facilities also contribute to harmful algae blooms and hypoxia. Moreover, “legacy” P lingers in watersheds and can sustain high P loads long after remediation begins. This dissertation provides new tools, techniques, and insights to better understand (1) the dynamics of legacy P and (2) how and when water quality and crop production targets can be reached. At the watershed scale, estimates for the lag times induced by in-stream P legacies have been especially abstract and understated. Existing watershed models have not been capable of providing more concrete estimates because existing models overlook or oversimplify in-stream P processes. As our first objective, we update the latest release of the Soil and Water Assessment Tool (SWAT+), a widely used watershed management model, to better represent in-stream P retention and remobilization (SWAT+P.R&R). SWAT+P.R&R improves the representation of internal model fluxes and, in a first diagnostic analysis, helps reconcile in-stream P retention theory (that P is retained at low flows and remobilized at high flows) and a discordant dataset in the Upper Sangamon River watershed (USRW) – a point source impacted watershed in the U.S. corn belt. We then leverage SWAT+P.R&R to evaluate the magnitude, longevity, and spatial cascade of legacy P remobilization in the USRW. Our results illustrate the “spiraling recovery” of P loads after a hypothetical point source remediation, where locations further downstream take longer to recover to baseline load levels. At the watershed outlet, in-stream legacy P contributions are equivalent to 30% of the baseline average annual P loads for three years after remediation. While some prior research suggests that in-stream legacies last less than one year, our results show that in-stream legacies do not approach exhaustion (95% remobilized) until at least 9 years after remediation. Finally, through reachability analysis, we characterize the minimum time until a combined P loss reduction and crop nutrient target can be hit. In contrast to existing legacy P studies that use simulation-based scenario analysis, reachability analysis back-propagates a “target set” for the system and describes the set of all initial conditions from which the target can be reached within a given horizon. In addition, our analysis shows that the optimal fertilizer rate strategy is, in general, bang-bang (meaning the rate is either at its minimum or maximum) and characterizes the trade-off between an interim crop nutrient deficit and the minimum hitting time for the joint target. Our results indicate it will take 41 years to reach the combined P loss reduction and crop nutrient requirements, compared to 27 years to reach the loss reduction target only. If crop nutrient requirements are to be met in the interim, it could take years or decades longer to reach the combined terminal target. The tools and techniques developed here are of broader value to the research and management communities, as SWAT+P.R&R can be applied for other watersheds and our reachability analysis can serve as a template for other water resource systems problems. Overall, the tools, techniques, and insights provided in this dissertation can help equip watershed researchers and managers to more accurately recognize the challenges they face with regard to legacy P and set a course toward realistic management targets
Implications of floodplain dynamics for reservoir operation
No full textDrought and flood events cause billions of dollars of economic damages in the United States and other countries every year. To alleviate both types of disaster, reservoirs regulate inflow, decreasing downstream variability. However, one blind spot in current reservoir operation, specifically considering flood and drought management, is the impacts of current operation on the demands which operation is subject to in the future. Reservoirs are operated considering event and seasonal scales but influences processes, such as socioeconomic development, that occur over much longer time scales and in turn feedback to influence reservoir decisions. Recent and ongoing progress in understanding coupled social-hydrological systems provides a path to begin pro-actively managing reservoirs considering socio-economic dynamics. We develop a proof-of-concept model for feedbacks between reservoir operation and floodplain development, a specific case of socio-economic feedbacks, and discuss its potential implications for reservoir management.LimitedAuthor requested closed access (OA after 2yrs) in Vireo ETD syste
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
