1,002 research outputs found

    Improving Claims Resolution: Alternative Processes in Canada\u27s Immigration System

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    This thesis argues that alternative dispute resolution processes form a vital part of Canada\u27s immigration and refugee claims determination system. Using an analytical framework that draws on dispute resolution and relational feminist theory, it explores how alternative processes provide advantages over adversarial ones for claims that engage issues of power and relationships. By aligning claims with appropriate processes, system administrators can improve the fairness, efficiency and durability of resolutions. Introductory Chapters describe the administrative law structure that governs immigration and refugee claims in Canada, and the Immigration Appeal Division\u27s Early Resolution program. This unique initiative integrates alternative processes into the Immigration and Refugee Board of Canada\u27s existing appellate structure. Subsequent Chapters assess how this initiative fares against the relevant scholarship. Strengths and challenges of the current system are highlighted. Concluding sections demonstrate how enhancements to the (i) accessibility of information; (ii) clarity regarding the roles and responsibilities of system actors; and (iii) flexibility in the breadth and depth of available alternative process options, can improve the experience of system users

    Trophic Ecology and Mercury Concentrations of Canary Rockfish (Sebastes Pinniger) in the California Current System

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    Canary rockfish are a profitable fishery resource that has failed and successfully recovered in the 21st century. This study aimed to evaluate their trophic ecology through stomach content and stable isotope analysis and relate these to their mercury concentrations, biological traits, and environmental conditions. Canary rockfish consume mostly krill and teleosts with their geographic location affecting the proportion of prey items, suggesting regional environmental effects: chlorophyll-a, relief, port, and depth impact dietary choices. Mean ??13C values (-17.18 ± 0.54) significantly increased in individuals residing in deeper depths, higher latitudes, higher productivity, and higher temperatures, and in sexually mature individuals. Mean ??15N values (15.26 ± 0.63) increased in individuals within higher latitudes, hotter temperatures, and elevated productivity. Mean calculated trophic level (3.52 ± 0.64) significantly increased in larger individuals, and those residing in more complex and cooler environments. Total mercury concentrations (0.04-0.50 ppm) significantly increased with ontogenetic development, weight, Fulton’s K, and latitude. Individuals that consumed higher proportions of teleosts and were larger, sexually mature, and resided in productive, nearshore, or northern environments possessed higher mercury concentrations. Future research should explore if resource allocation changes throughout the year for Canary rockfish, and if mercury concentrations do pose a threat to regional commercial and recreational fisheries

    Damage and microstructural change in laboratory grown ice under high pressure zone conditions

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    Ice-structure interactions, where crushing is the predominant mode of failure, are characterised by zones of intense high pressure within the ice feature. This work investigates the mechanical and microstructural behaviour within these zones by using triaxial testing on laboratory grown freshwater granular ice. The latest interpretation of the behaviour of ice in high pressure zones during ice-structure interactions is presented, based on previous work at Memorial University of Newfoundland. A review of triaxial testing on ice is also presented. -- Results of triaxial testing on ice indicate the existence of two separate but overlapping deformation mechanism regimes at high and low confining pressures. High microcrack densities followed by a reduction in grain size by recrystallisation and restructuring were observed in low hydrostatic pressure tests (p 40 MPa) this was replaced by more intense recrystallisation and possible pressure melting at grain boundaries and triple points. -- Triaxial tests were used in the calibration of a pressure-dependent constitutive model for granular ice. The constitutive model is based on continuum damage mechanics and uses the reduction of the standard Burgers body to a single non-linear dashpot to model the response of ice under high stress and high strain conditions. Results show moderate agreement with test data collected from ice damaged triaxially at constant deformation rate and loaded axially at high confining pressures,. More work is needed to improve the calibration of the model further over a wider range of confining pressures

    Use of practice tracks in the medical specialties.

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    OBJECTIVES: To evaluate the use of practice tracks by each of the 24 medical specialty boards and to compare this with the experience in emergency medicine (EM). METHODS: Scripted telephone surveys were conducted with representatives of each of the specialty boards. RESULTS: Of 24 specialties currently recognized by the American Board of Medical Specialties (ABMS), 14 (58%) reported a history of a practice track. Eight boards reported never having a practice track and 2 were unsure. All practice tracks have been limited in duration, most commonly closing after a specified period. The mean duration of the practice tracks was 9.8 years, the median was 7.5 years, and the range was 3-27 years. The practice track in EM was open for 9 years. CONCLUSIONS: Practice tracks were common in the early years of most specialties and most were limited by duration. The history of the practice track in EM is not dissimilar to those of other specialties

    Suitability of soxhlet extraction to quantify microalgal fatty acids as determined by comparison with in situ transesterification

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    Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Lipids 47 (2012): 195-207, doi:10.1007/s11745-011-3624-3.To assess Soxhlet extraction as a method for quantifying fatty acids (FA) of microalgae, crude lipid, FA content from Soxhlet extracts and FA content from in-situ transesterification (ISTE) were compared. In most cases, gravimetric lipid content was considerably greater (up to 7-fold) than the FA content of the crude lipid extract. FA content from Soxhlet lipid extraction and ISTE were similar in 12/18 samples, whereas in 6/18 samples, total FA content from Soxhlet extraction was less than the ISTE procedure. Re-extraction of residual biomass from Soxhlet extraction with ISTE liberated a quantity of FA equivalent to this discrepancy. Employing acid hydrolysis before Soxhlet extraction yielded FA content roughly equivalent to ISTE, indicating that acidic conditions of ISTE are responsible for this observed greater recovery of FA. While crude lipid derived from Soxhlet extraction was not a useful proxy for FA content for the species tested, it is effective in most strains at extracting total saponifiable lipid. Lipid class analysis showed the source of FA was primarily polar lipids in most samples (12/18 lipid extracts contained 15%). This investigation confirms the usefulness of ISTE, reveals limitations of gravimetric methods for projecting biodiesel potential of microalgae, and reinforces the need for intelligent screening using both FA and lipid class analysis.2012-11-0

    Trapped and marginally trapped surfaces in Weyl-distorted Schwarzschild solutions

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    To better understand the allowed range of black hole geometries, we study Weyl-distorted Schwarzschild solutions. They always contain trapped surfaces, a singularity and an isolated horizon and so should be understood to be (geometric) black holes. However we show that for large distortions the isolated horizon is neither a future outer trapping horizon (FOTH) nor even a marginally trapped surface: slices of the horizon cannot be infinitesimally deformed into (outer) trapped surfaces. We consider the implications of this result for popular quasilocal definitions of black holes.Comment: The results are unchanged but this version supersedes that published in CQG. The major change is a rewriting of Section 3.1 to improve clarity and correct an error in the general expression for V(r,\theta). Several minor errors are also fixed - most significantly an incorrect statement made in the introduction about the extent of the outer prison in Vaidya. 17 pages, 2 figure

    Does Eating Slowly Influence Appetite and Energy Intake when Water Intake is Controlled?

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    Background: Slow eating has been associated with enhanced satiation, but also with increased water intake. Therefore, the role of water ingestion in regard to eating rate needs to be discerned. This study examined the influence of eating rate on appetite regulation and energy intake when water intake is controlled. Methods: In a randomized design, slow and fast eating rates were compared on two occasions, in 30 women (22.7±1.2y; BMI=22.4±0.4kg/m2) who consumed an ad libitum mixed-macronutrient lunch with water (300 mL). Satiation was examined as the main outcome by measuring energy intake during meals. At designated times, subjects rated hunger, satiety, desire-to-eat, thirst, and meal palatability on visual analogue scales. Paired t-tests were used to compare hypothesis-driven outcomes. Appetite ratings were compared across time points and conditions by repeated measures analysis of variance (ANOVA) using a within-subject model. Results: Energy intake and appetite ratings did not differ between conditions at meal completion. However, subjects rated less hunger and tended to rate lower desire-to-eat and greater satiety at 1 hour following the slow condition. Conclusions: Results tend to support a role of slow eating on decreased hunger and higher inter-meal satiety when water intake is controlled. However, the lack of significant differences in energy intake under these conditions indicates that water intake may account for the effects of eating rate on appetite regulation

    Triacylglycerol profiling of microalgae strains for biofuel feedstock by liquid chromatography–high-resolution mass spectrometry

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    Biofuels from photosynthetic microalgae are quickly gaining interest as a viable carbon-neutral energy source. Typically, characterization of algal feedstock involves breaking down triacylglycerols (TAG) and other intact lipids, followed by derivatization of the fatty acids to fatty acid methyl esters prior to analysis by gas chromatography (GC). However, knowledge of the intact lipid profile could offer significant advantages for discovery stage biofuel research such as the selection of an algal strain or the optimization of growth and extraction conditions. Herein, lipid extracts from microalgae were directly analyzed by ultra-high pressure liquid chromatography–mass spectrometry (UHPLC-MS) using a benchtop Orbitrap mass spectrometer. Phospholipids, glycolipids, and TAGs were analyzed in the same chromatographic run, using a combination of accurate mass and diagnostic fragment ions for identification. Using this approach, greater than 100 unique TAGs were identified over the six algal strains studied and TAG profiles were obtained to assess their potential for biofuel applications. Under the growth conditions employed, Botryococcus braunii and Scenedesmus obliquus yielded the most comprehensive TAG profile with a high abundance of TAGs containing oleic acid

    The Effects of Four Hypocaloric Diets Containing Different Levels of Sucrose or High Fructose Corn Syrup on Weight Loss and Related Parameters

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    Background: The replacement of sucrose with HFCS in food products has been suggested as playing a role in the development of obesity as a public health issue. The objective of this study was to examine the effects of four equally hypocaloric diets containing different levels of sucrose or high fructose corn syrup (HFCS). Methods: This was a randomized, prospective, double blind trial, with overweight/obese participants measured for body composition and blood chemistry before and after the completion of 12 weeks following a hypocaloric diet. The average caloric deficit achieved on the hypocaloric diets was 309 kcal. Results: Reductions were observed in all measures of adiposity including body mass, BMI,% body fat, waist circumference and fat mass for all four hypocaloric groups, as well as reductions in the exercise only group for body mass, BMI and waist circumference. Conclusions: Similar decreases in weight and indices of adiposity are observed when overweight or obese individuals are fed hypocaloric diets containing levels of sucrose or high fructose corn syrup typically consumed by adults in the United States
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