1,721,065 research outputs found
Suburbanization and amphibians: designed ecological solutions
No full textRegulations guiding land development around seasonal isolated wetlands disregard habitat requirements for specialized faunal inhabitants. This oversight needs to be addressed at multiple scales in order to sustain future seasonal pond inhabitants. In particular, pool-breeding amphibians are suffering worldwide decline and are susceptible to water quality, temperature, hydrology and watershed impacts. The complex aquatic-terrestrial lifecycle of amphibians
makes them sensitive to terrestrial habitat alterations and fragmentation. The temporal variation in hydroperiod within individual ponds and variation in
hydrology across ponds within a landscape create a stochastic system. In these systems amphibian populations likely function as metapopulations, and rely on juvenile dispersal and rescue effects to counter local extinction. Given the limited regulations at the local, state and federal level, maintaining amphibian breeding
populations will require efforts at the pond, migration corridor, upland habitat, watersheds and regional connectivity levels. Addressing these gaps requires
further basic research to expose hidden aspects of amphibian lifecycle patterns, in part due to their fossorial nature as well as the challenges of interpreting
metapopulation connectivity. Addressing the gaps also requires translating the ecological requirements into preservation tactics within the pressures of land
development, which poses substantial challenges. I utilized designed experiments, which serve as a hybrid research and planning approach, to navigate these complex circumstances. Here, I present a series of large-scale field experiments situated within a 500-hectare privately owned suburban development project located in Tuxedo, New York. The field experiments were implemented as part of the masterplanning process with the aim of exposing and
addressing several of these regulatory gaps from both a basic science and applied solutions perspective. A series of drift fence and pit-fall trap experiments provides data at the scale of individual breeding populations and their migration patterns to and from ponds. Larval density studies utilizing replicate enclosures evaluate the impact of within pond density versus variability of habitat quality across ponds. This analysis provides a bioassay of species performance teasing apart the presumed dominant effect of density versus variation across ponds. The results of this study indicate that physical and biotic pond scale factors have
a far greater effect on survival and fecundity than density. These results differ from the environmental consultant's evaluation of the same ponds and call into
question the current rapid assessment of pond habitat.Ph.D.Includes bibliographical references (p. 233-237)by Alexander Jacob Felso
[Dr. Alexander Jacob "Zannie" Beville as a Young Boy]
No full textPhotograph of Dr. Alexander Jacob "Zannie" Beville as a young boy. He is positioned in front of a dark background and wearing a dark color jacket. Under his jacket is he wearing a light color dress shirt with a dark color bow tie
De corpore gummoso quam divinis sub auspiciis consensu
No full textsubmittit Alexander Jacobus Düttel Ordlingensis die Julii A.R.S. MDCCLXVII ...Diss. inaug. med
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
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