INTERNATIONAL EFFECTS OF CANADA'S WESTERN GRAIN STABILIZATION PROGRAM

Canada's Western Grain Stabilization program is analyzed to determine the extent to which it acts as a buffer between the Canadian grains economy and the international grains economy. A dynamic stochastic simulation model is constructed to examine how Canada's Western Grain Stabilization Program modifies the transmission of: (a) domestic yield variability to the foreign grain market and (b) foreign demand variability to the domestic grains market. With respect to (a), the program was found to aggravate international uncertainty only very slightly while with respect to (b) it was found to substantially reduce domestic uncertainty.Agricultural and Food Policy, International Relations/Trade,

Metaphorical use of language in educational discourse : a theoretical and empirical investigation.

This thesis investigates metaphor used by teachers and textbook writers, and the impact\ud on children. The theoretical investigation clarifies definitions and descriptions of\ud metaphor, to establish a valid, adequate framework for analysis of metaphor in ordinary,\ud contextualised interaction. A "prosaics of metaphor" is developed, including metaphor\ud identification procedures, a set of graded descriptors of metaphor, and interactional units\ud of analysis to investigate metaphor in talk. Theoretical issues of the coherence of the\ud category "prosaic metaphor", and the relation between prosaic and poetic metaphor, are\ud discussed.\ud Two linked empirical investigations are centred around a ten year old child's discourse\ud experience in a U.K. primary classroom. The first analyses transcribed talk, collected\ud across several different lessons, for use of metaphor in relation to teaching/learning\ud goals. Results include information on the frequency, distribution and nature of metaphor\ud in use, and insights into how metaphor is signalled and supported in teacher-pupil\ud interaction. Metaphor use is explained in terms of contextual demands, and the set of\ud graded metaphor descriptors is refined. The second investigation uses a variation of\ud Think Aloud methodology to explore understanding of metaphors in scientific texts.\ud Analysis shows how knowledge brought to a text, selection of metaphors, the place of\ud metaphor in text structure, and peer or adult mediation can influence understanding and\ud learning.\ud The study reveals how metaphor choice can oversimplify concepts and skills which\ud children need to acquire in the middle years of education. Interaction is shown as central\ud in providing access to new ideas through metaphor. These results carry implications for\ud textbook writers, teachers, and others who may mediate content through metaphor. The\ud thesis contributes to the field of metaphor studies through links found between child and\ud adult use of metaphor, and through the development of tools for analysing metaphor in\ud interaction, which can be refined and extended to other discourse contexts

Landscapes of empathy: spatial scenarios, metaphors and metonymies in responses to distant suffering

This study re-analyses focus group data on responses to human rights abuses, to investigate how participants’ experiences in their local social and physical worlds influence empathy with distant suffering others. Metaphors, metonymies, narratives and typifying scenarios were identified in the discourse dynamics. Scenarios, metaphors and metonymies of space and place emerge as particularly significant in the dialogic co-construction of moral reasoning. Embodied experiences, specifically encounters with people begging in the street, become emblematic of perceived threats to personal space that should feel private and secure. Systematic spatial metaphors construct a landscape of empathic understanding with an optimal distance for empathy, neither too close nor too far. Faced with distant suffering others in prompt materials, participants respond with parallel reasoning on the symbolic landscape. Implications for increasing empathic understanding of distant others are discussed

A 10-Year Retrospective Case Study of the Relation between Four Summative Assessment Measures in a Graduate Speech-Language Pathology Program

Assessment is essential to ensure that quality levels of teaching and learning are maintained in graduate programs in Communication Sciences and Disorders (CSD). In this article, we present a ten-year retrospective case study of one CSD master’s program approach to address speech-language pathology program-level summative assessment. We evaluated the strength of the relation between three departmental summative measures (i.e., Grand Rounds [Capstone Course] final grade percentages, Written Comprehensive examinations, Oral Comprehensive examinations) and the national Praxis Examination in Speech-Language Pathology (5331). The strongest correlations were between the Grand Rounds final grade percentages, Written Comprehensive examinations, and the Praxis. The weakest correlations were between the Oral Comprehensive examinations and the other examination types. The study findings demonstrate the concurrent validity of Grand Rounds final grade percentages, Written Comprehensive examinations, and the Praxis. Capstone courses should be considered for their benefit in Praxis preparation, whereas oral comprehensive examinations may better serve as formative rather than summative assessment

Appendicular skeletal muscle in hospitalised hip-fracture patients: development and cross-validation of anthropometric prediction equations against dual-energy X-ray absorptiometry

© The Author 2014. Published by Oxford University Press on behalf of the British Geriatrics Society.All rights reserved. Reproduced by permission of Oxford University PressBackground: accurate and practical assessment methods for assessing appendicular skeletal muscle (ASM) is of clinical importance for the diagnosis of geriatric syndromes associated with skeletal muscle wasting. Objectives: the purpose of this study was to develop and cross-validate novel anthropometric prediction equations for the estimate of ASM in older adults post-surgical fixation for hip fracture, using dual-energy X-ray absorptiometry (DEXA) as the criterion measure. Subjects: community-dwelling older adults (aged ≥65 years) recently hospitalised for hip fracture. Setting: participants were recruited from hospital in the acute phase of recovery. Design: validation measurement study. Measurements: a total of 79 hip fracture patients were involved in the development of the regression models (MD group). A further 64 hip fracture patients also recruited in the early phase of recovery were used in the cross-validation of the regression models (CV group). Multiple linear regression analyses were undertaken in the MD group to identify the best performing prediction models. The linear coefficient of determination (R2) in addition to the standard error of the estimate (SEE) were calculated to determine the best performing model. Agreement between estimated ASM and ASMDEXA in the CV group was assessed using paired t-tests with the 95% limits of agreement (LOA) assessed using Bland–Altman analyses. Results: the mean age of all the participants was 82.1 ± 7.3 years. The best two prediction models are presented as follows: ASMPRED-EQUATION_1: 22.28 – (0.069 * age) + (0.407 * weight) – (0.807 * BMI) – (0.222 * MAC) (adjusted R2: 0.76; SEE: 1.80 kg); ASMPRED-EQUATION_2: 16.77 – (0.036 * age) + (0.385 * weight) – (0.873 * BMI) (adjusted R2: 0.73; SEE: 1.90 kg). The mean bias from the CV group between ASMDEXA and the predictive equations is as follows: ASMDEXA – ASMPRED-EQUATION_1: 0.29 ± 2.6 kg (LOA: −4.80, 5.40 kg); ASMDEXA – ASMPRED-EQUATION_2: 0.13 ± 2.5 kg (LOA: −4.77, 5.0 kg). No significant difference was observed between measured ASMDEXA and estimated ASM (ASMDEXA: 16.4 ± 3.9 kg; ASMPRED-EQUATION_1: 16.7 ± 3.2 kg (P = 0.379); ASMPRED-EQUATION_2: 16.6 ± 3.2 kg (P = 0.670)). Conclusions: we have developed and cross-validated novel anthropometric prediction equations against DEXA for the estimate of ASM designed for application in older orthopaedic patients. Our equation may be of use as an alternative to DEXA in the diagnosis of skeletal muscle wasting syndromes. Further validation studies are required to determine the clinical utility of our equation across other settings, including hip fracture patients admitted from residential care, and also with a longer-term follow-up

Revisiting Ruddick: Feminism, pacifism and non-violence

This article explores feminist contentions over pacifism and non-violence in the contextof the Greenham Common Peace Camp in the 1980s and later developments offeminist Just War Theory. We argue that Sara Ruddick’s work puts feminist pacifism, its radical feminist critics and feminist just war theory equally into question. Although Ruddick does not resolve the contestations within feminism over peace, violence and the questions of war, she offers a productive way of holding the tension between them. In our judgment, her work is helpful not only for developing a feminist political response to the threats and temptations of violent strategies but also for thinking through the question of the relation between violence and politics as such

Even More Rapidly Rotating Pre-main-sequence M Dwarfs with Highly Structured Light Curves: An Initial Survey in the Lower Centaurus-Crux and Upper Centaurus-Lupus Associations

Using K2, we recently discovered a new type of periodic photometric variability while analyzing the light curves of members of Upper Sco. The 23 exemplars of this new variability type are all mid-M dwarfs, with short rotation periods. Their phased light curves have one or more broad flux dips or multiple arcuate structures which are not explicable by photospheric spots or eclipses by solid bodies. Now, using Transiting Exoplanet Survey Satellite data, we have searched for this type of variability in the other major sections of Sco-Cen, Upper Centaurus-Lupus (UCL), and Lower Centaurus-Crux (LCC). We identify 28 stars with the same light curve morphologies. We find no obvious difference between the Upper Sco and the UCL/LCC representatives of this class in terms of their light curve morphologies, periods, or variability amplitudes. The physical mechanism behind this variability is unknown, but as a possible clue we show that the rapidly rotating mid-M dwarfs in UCL/LCC have slightly different colors from the slowly rotating M dwarfs—they either have a blue excess (hot spots?) or a red excess (warm dust?). One of the newly identified stars (TIC242407571) has a very striking light curve morphology. At about every 0.05 in phase are features that resemble icicles. The icicles arise because there is a second periodic system whose main feature is a broad flux dip. Using a toy model, we show that the observed light curve morphology results only if the ratio of the two periods and the flux-dip width are carefully arranged

Orbiting clouds of material at the Keplerian co-rotation radius of rapidly rotating low mass WTTs in Upper Sco

Using K2 data, we have identified 23 very low mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability not easily explained by well-established physical mechanisms such as star spots, eclipsing binaries, or pulsation. All of these unusual stars are mid-to-late M dwarfs without evidence of active accretion, and with photometric periods generally <1 day. Often the unusual light curve signature takes the form of narrow flux dips; when we also have rotation periods from star spots, the two periods agree, suggesting that the flux dips are due to material orbiting the star at the Keplerian co-rotation radius. We sometimes see “state-changes” in the phased light curve morphologies where ∼25% of the waveform changes shape on timescales less than a day; often, the “state-change” takes place immediately after a strong flare. For the group of stars with these sudden light curve morphology shifts, we attribute their flux dips as most probably arising from eclipses of warm coronal gas clouds, analagous to the sling-shot prominences postulated to explain transient Hα absorption features in AB Doradus itself and other rapidly rotating late type stars. For another group of stars with somewhat longer periods, we find the short duration flux dips to be highly variable on both short and long timescales, with generally asymmetric flux dip profiles. We believe that these flux dips are due to particulate clouds possibly associated with a close-in planet or resulting from a recent collisional event.PostprintPeer reviewe