1,721,001 research outputs found
Outbreak investigation in a production system
No full textPittman, Jeremy. (2011). Outbreak investigation in a production system. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/140770
Small-scale fisheries and adaptive capacity to climate change in the Americas
No full textThis data set includes a number of variables on the adaptive capacity of small-scale fisheries in three countries: Brazil, Uruguay, and Ecuador
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Physical versus behavioural emissions reductions: Quantifying and comparing emissions reduced by behaviour and emissions reduced by technology of net-zero communities
Full text linkModern climate change research calls for more diverse and creative solutions past simply improving technology; there is not one solution to climate change. A multidisciplinary field like planning can affect both physical changes in a city or behaviour changes in people to reduce greenhouse gas emissions. Despite these considerations, behavioural emissions reductions remain an underexplored topic of literature, especially in terms of emission quantification. Without this information, planners cannot make the most informed and resource efficient policy decisions to combat climate change. This thesis fills this literature gap by quantifying behavioural emissions reductions and comparing them to the best-case scenario for physical emissions, net-zero communities, in the context of Ontario’s first, recently completed, net-zero community located in London, Ontario. This thesis also begins to explore relationships and patterns between sources of behavioural emissions reductions and how they can compound into greater reductions. Within the study area, net-zero homes produced 6.89 fewer tonnes of CO2e/year compared to the average home, 67.5% of which were physical emissions reductions and 32.5% of were behavioural. Residents here generally improved few behaviours to a large magnitude rather than improving many/all behaviours to a small magnitude. While no specific behaviour patterns were identified, the there was evidence in favour of patterns existing, which could by identified with a larger sample. Overall, while behavioural emissions reductions were less effective than physical, they can be implemented both concurrently and instead of physical when necessary. There is also potential for behavioural emissions reductions to be more effective than physical given the right context and if behavioural patterns are used to their fullest
Effect of fenbendazole on shedding and embryonation of Ascaris suum eggs from naturally infected sows
No full textObjectives: To determine reduction of Ascaris suum egg shedding and ovicidal effects in naturally infected commercial female breeding swine treated with fenbendazole.
Materials and methods: Five shedding and three embryonation experiments across three commercial sow farms were conducted. Ascaris suum-infected sows were allocated to four treatments: untreated controls; 545.5 mg fenbendazole, 1 day (Treatment 1); 545.5 mg fenbendazole, 3 consecutive days (1636.5 mg total) (Treatment 2); and 1636.5 mg fenbendazole, 1 day (Treatment 3). Fecal samples were collected and evaluated by a standard flotation method (shedding study) or eggs were isolated and incubated (embryonation study) to determine embryonation rates. Groups were compared for time-to-negative (Kaplan-Meier survival analysis); percent negative (chi-square analysis); environmental burden (analysis of variance); and embryonation rates (analysis of variance).
Results: Time-to-negative ranges were 9.3-13.1, 8.9-13.1, and 9.8 days post treatment (DPT) for treatments 1, 2, and 3, respectively; control ranges were 13.4-28.2 DPT. Treatment sows were 90%-100% negative, compared to 0.0%-28.6% of controls. Environmental burden ranges were 7.0%-60.9%, 13.9%-60.8%, and 29.3% (treatments 1, 2, and 3, respectively) and 60.4%-219.0% for controls. All treatment values differed from controls (P
Implications: Fenbendazole at various dosages is effective against A suum infections in sows. Treatment should begin 14 days prior to movement into clean farrowing facilities. Under the conditions of this study, fenbendazole demonstrates ovicidal activity against A suum at 4-8 DPT.This is an article from Pittman, Jeremy S., Gil H. Myers, Kenneth J. Stalder, and Locke A. Karriker. "Effect of fenbendazole on shedding and embryonation of Ascaris suum eggs from naturally infected sows." Journal of Swine Health and Production 23, no. 5 (2015): 252-263. Posted with permission.</p
Landscape Connectivity Analysis for Conservation Planning in Southern Ontario
Full text linkThe strategic planning of land conservation is a critical undertaking in urban/peri-urban areas. Natural areas in cities and their surroundings exist in an environment of competitive land use pressures, where the allocation of available land may be complex and politically charged. Organizations pursuing land conservation in these areas must balance biodiversity aims with fiscal and resource limitations, a competitive market, and the need for decision-making accountability.
To support the prioritization of conservation lands for protection, analysts may incorporate landscape connectivity analysis. By quantifying how the configuration of habitat facilitates species movement, connectivity analysis provides a rationale for conservation planning that supports the dispersal of species across the urban/peri-urban matrix.
While connectivity analysis is useful for conservation planners, several factors have created a confusing environment for those interested in employing it. These include the rapid proliferation of connectivity research, the inconsistent use of methods and terminology, and an absence of updated selection guidelines for practitioners. Thus, my research evaluates how conservation organizations may best use landscape connectivity analysis to support conservation planning in urban/peri-urban areas.
In this thesis, a systematic review of urban/peri-urban connectivity literature is followed by application of review results to a conservation planning case study in Southern Ontario. Reflections on these two research phases support a proposed framework that outlines the pivotal decisions, organizational limitations, and best practices for using landscape connectivity analysis for conservation planning. This provides tangible benefit for organizations protecting and stewarding natural lands, particularly in areas like the urban/peri-urban matrix of Southern Ontario
A Relative Landscape-Level Habitat Quality Model for the Burrowing Owls of the Canadian Prairies
Full text linkThe range and population of the Burrowing Owls as flagship migratory species of the open prairie
landscape are in decline across the northernmost portion of their global range in Canada. Multiple
sources of degradation, including those induced by human footprint, are attributed to this declining
trend. Yet the degradation caused by these factors is yet to be quantified and mapped at the
landscape-level.
Using the InVEST habitat quality model, the habitat quality values for these endangered birds were
quantified, mapped, and evaluated across both the historic and current ranges of these species in the
Canadian Prairie ecosystem. In doing so, four different general categories of disturbance, namely the
modified landscape, transportation network, urban areas, and energy infrastructure were considered.
Also, variations of habitat quality values were modelled across the current range of these species
upon the consideration of the different combinations of these sources of disturbance at this spatial
extent.
The results of the study illustrate that despite the differences in the relative habitat quality values
between the historic and current ranges of Burrowing Owls, these variations are not statistically
significant between the two ranges when all sources of degradation are considered concurrently in
the study area. Across the current range, also, the difference in habitat quality values is not
statistically significant between the considered scenarios, even when specific habitat patches are
assessed.
Nevertheless, the habitat quality was most affected by the transportation network data layer,
followed by the energy and urban data layers. Consequently, the delineated spatial sources of
disturbance can only be considered to have intensified the synergistic association between the other
factors attributed to the decline of these species including the prolonged impact of grassland
iv
conversion activities of the past, which has altered the configurational characteristics of the
landscape, as well as to the other environmental factors affecting the population of these endangered
species across the study area and beyond.
Considering the existing composition of land use/cover and share of specified sources of
disturbance in habitat quality degradation across the current range of Burrowing Owls, conservation
measures can be applied beyond the designated critical habitat boundaries for these species to
preclude the potential future impacts of these sources of degradation. Further studies are still
required to assess habitat quality values under the anthropogenic sources of degradation beyond the
considered spatial extent and with regard to the other sources of disturbance across the global range
of these species
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