1,720,952 research outputs found
Incorporating microclimate into habitat suitability analysis for plethodonitd salamanders
Get PDFClimate has substantial influence on the distribution of species, and climate change puts many species at risk of extirpation or extinction due to diminishing range sizes. Understanding how organisms may respond to climate change is important for spatially predicting suitable habitat for conservation planning. However, current approaches to modeling suitable habitat typically rely on climate data that do not account for important buffering effects of vegetation on near-surface microclimates and are produced at spatiotemporal scales irrelevant to a variety of organisms that thrive in microenvironments. Furthermore, commonly used species distribution models may not account for mechanistic aspects, like physiology, that are relevant to the biology and performance of a species. This dissertation integrates aspects from three main components of a species’ niche (the habitat, trait, and performance components) into robust correlative and mechanistic models for habitat suitability analysis at the microscale. This involved the development and evaluation of an approach that incorporates vegetation structure across the entire vertical profile of forests into predictions of microclimatic temperature at a highly spatially resolved scale. The resulting maps of microclimatic temperature (habitat component) were incorporated into a physiological model (trait component) that included a novel method that accounts for body-mass elevation effects for predicting the metabolic rate of three plethodontid salamander species of varying sizes, sexes, and stage classes. Predictions of suitable climatic habitat, vapor pressure deficit, and salamander physiology were combined (performance component) at varying spatial scales and temporal periods to assess spatiotemporal agreement between model approaches and to target suitable habitat at relevant biological scales to plethodontid salamanders in Great Smoky Mountains National Park. Understory vegetation structure was found to be an important addition to canopy cover in buffering near-surface temperatures and improved accuracy of microclimatic temperature estimates. The combined effects of microclimatic temperature variation with increasing plethodontid body mass along elevational gradients resulted in spatiotemporal differences in salamander energetics across species, sexes, and stage classes. Integrating physiological models with predicted suitable habitat demonstrated important spatiotemporal mismatches between model approaches, highlighting a problem with relying on static species distribution models, which neglect important temporal changes in energetic demand of plethodontid salamanders. Furthermore, this dissertation validates the importance of incorporating microclimate into species distribution models and demonstrates approaches to integrating multiple model types for spatiotemporal targeting of suitable habitat that account for temporal variations in energetic demand as well as variations among species and across stage classes. The results from this dissertation reveal the importance of predicting microclimate more accurately by accounting for the proper vegetation and biophysical buffers to near-surface temperature, and highlight the use of multiple model approaches, correlative and mechanistic, developed at proper spatial and temporal scales for spatially analyzing and targeting suitable habitat, especially for species vulnerable to climate change.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-08-01The student, Samuel Stickley, accepted the attached license on 2021-07-06 at 16:12.The student, Samuel Stickley, submitted this Dissertation for approval on 2021-07-06 at 16:40.This Dissertation was approved for publication on 2021-07-08 at 09:33.DSpace SAF Submission Ingestion Package generated from Vireo submission #16770 on 2022-01-12 at 12:53:23Made available in DSpace on 2022-01-12T22:35:00Z (GMT). No. of bitstreams: 4
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Previous issue date: 2021-07-08Embargo set by: Seth Robbins for item 121071
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Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Onl
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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