1,721,367 research outputs found
Why Animal Welfare & Why Now... The Social Context of Animal Welfare
No full textWalker, Jennifer. (2011). Why Animal Welfare & Why Now... The Social Context of Animal Welfare. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/118924
Dataset supporting the University of Southampton Doctoral Thesis "Detection and segmentation of fauna in seafloor imagery for biomass estimation"
No full textThis dataset is supporting the University of Southampton Doctoral Thesis "Detection and segmentation of fauna in seafloor imagery for biomass estimation".
The dataset includes: FK2018 Coco Format Labelled Images. The images were taken from AE2000f and Tuna sand labelled with 5 morphotypes in the coco segment format, Crabs, Hagfish, Flatfish, Sea Stars, and Rockfish.
The data is stored on Zenodo at https://doi.org/10.5281/zenodo.8335053
Under the CC BY license</span
Holocene Relative Sea-Level Changes from Near-, Intermediate-, and Far-Field Locations
No full textHolocene relative sea-level (RSL) records exhibit spatial and temporal variability that arises mainly from the interaction of eustatic (land ice volume and thermal expansion) and isostatic (glacio- and hydro-) factors. We fit RSL histories from near-, intermediate-, and far-field locations with noisy-input Gaussian process models to assess rates of RSL change. Records from near-field regions (e.g., Antarctica, Greenland, Canada, Sweden, and Scotland) reveal a complex pattern of RSL fall from a maximum marine limit due to the net effect of eustatic sea-level rise and glacio-isostatic uplift with rates of RSL fall as great as -69 ± 9 m/ka. Intermediate-field regions (e.g., mid-Atlantic and Pacific coasts of the United States, Netherlands, Southern France, St. Croix) display variable rates of RSL rise from the cumulative effect of isostatic and eustatic factors. Fast rates of RSL rise (up to 10 ± 1 m/ka) are found in the early Holocene in regions near the center of forebulge collapse. Far-field RSL records exhibit a mid-Holocene highstand, the timing (between 8 and 4 ka) and magnitude (between <1 and 6 m) of which varies among South America, Africa, Asia and Oceania regions.Peer reviewe
Detection and segmentation of fauna in seafloor imagery for biomass estimation
No full textMachine learning based image processing is sensitive to variation caused by hardware and observation conditions, making the use of machine learning with marine imagery particularly difficult when transferring knowledge between datasets. There is also a considerable gap between the outputs of machine learning systems and useful biological information for marine conservation purposes. This thesis investigates the effects of physics-based image normalisation and augmentation methods on the transferability of an object detection and segmentation system between two distinct datasets taken at different altitudes from the seafloor with different camera and lighting systems. Scale, colour, and lens distortion correction methods are investigated, along with augmentation methods including linear contrast, motion blur, and noise, and more advanced distorting methods such as elastic distortions and piece-wise affine transformations. A set of experiments for each combination of independent variables has been carried out, finding a clear improvement when using scale correction. When applying to low altitude datasets only there is an increase in average performance from 62.2% to 68.6%, and when transferring knowledge from high to low altitude datasets, there is an increase in performance from an average of 26.5% to 44.1% when using scale normalisation. Colour normalisation also had a large impact, when applied to low altitude data showing an increase in performance from 56.6% to 74.1%, and when transferring from high altitude to low altitude datasets showing an increase in performance from 32.7% to 38.0%. The impacts of lens distortion correction and various augmentation methods were found to be less significant. This thesis goes on to demonstrate the use of segmentation results for biomass estimation through a simple polynomial relationship between segment size and length of an individual, and previously well-established Length Weight Relationships (LWRs). The resulting method is fully scalable to larger datasets with no additional human effort required, a vast improvement on the current labour-intensive biomass estimation methods used
Seaswells
Get PDFSTAFF: Shandy Stubbs (Editor-in-Chief), Karen Price (First Copy Program Coordinator), Rosco Peters (Design/Layout Coordinator), Monica Kratz, Joshua Meunier, Deborah Walker, Jennifer Walker (Fall Semester Staff), Janet Dominy (Cover Photographer), Sharon L. Bartkovich (Faculty Adviser) – CONTENTS: Poetry, Photography, Prose, Ar
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
- …
