ERA: Education & Research Archive

University of Alberta research openly shared with the world.

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@Risk North 3 12
This open event, hosted by The Canadian Association of Research Libraries and co-sponsoring organizations including Canadian Research Knowledge Network, Library and Archives Canada, Bibliothèque et Archives nationales du Québec, Internet Archive Canada, Digital Research Alliance of Canada, and the Digital Preservation Coalition provided an opportunity for those at Canadian institutions who have strategic or operational responsibility for long-term access and preservation of digital content to learn from each other about progress, practices and policies for digital preservation in a Canadian context.
Academic Writing Resources and Research 4
The University of Alberta provides a variety of writing supports that are accessible, learner-centered, relevant, and responsive to the community's diverse needs.
ACCES Research Group 10
The Alberta Continuing Care Epidemiological Studies (ACCES) was a province-wide research program involving over 2,000 older adults residing in designated assisted/supportive living facilities (DAL) and in long-term care facilities (LTC) between 2006 and 2009, their family caregivers, and the facilities in which they lived. The objectives of ACCES were: a) to examine the health, social needs, and quality of care of older adults in DAL and LTC facilities in Alberta, b) to identify the mix of services provided to these residents, including assistance from family caregivers, and c) to examine health outcomes across settings, taking resident and facility characteristics into account.
Agricultural, Food and Nutritional Science, Department of 557
The Department of Agricultural, Food, and Nutritional Science offers thesis programs leading to Master of Science and Doctor of Philosophy degrees, as well as course-based programs leading to Master of Agriculture, Master of Engineering and Master of Science degrees. The Department has active research programs in the following areas of specialization: Animal Science, Plant Science, Food Science and Technology, Nutrition and Metabolism, Bioresource and Food Engineering, Rangeland and Wildlife Resources and Bioresource Technology
Agricultural, Life, and Environmental Sciences, Faculty of 37
The Faculty of ALES is where global challenges are met with innovative solutions. Every day, world-class research is conducted by the finest minds in the natural sciences, social sciences and business. While we are one of the oldest faculties on campus, our cross disciplinary approach, and commitment to excellence, positions us uniquely to provide solutions to some of the world’s most complex problems.

Recent Submissions

Access status: Authenticated ,
Environment: The Hill Times Policy Briefing, May 6, 2026
(2026-05-06) Hill Times Publishing
Access status: Authenticated ,
Artificial Intelligence: The Hill Times Policy Briefing, May 4, 2026
(2026-05-04) Hill Times Publishing
Access status: Authenticated ,
The Hill Times, Wednesday, May 6, 2026
(2026-05-06) Hill Times Publishing
The newspaper of Parliament.
Access status: Open Access ,
Landmarks Reset Self-Localization but Not Goal-Localization: Evidence for Interactive Error Propagation in Navigation
(2026-05-06) Chen, Yue; Chan, Jasmin; Gulawani, Advait M.; Mou, Weimin
This study investigated how self-localization errors, specifically position and heading errors, propagate to goal-localization error during navigation. Goal error can be defined as the difference between position and heading errors. The interactive-propagation hypothesis posits that position and heading errors arising from the same cues (e.g., self-motion) are correlated. Because goal computation incorporates both components, shared error can partially cancel, and the degree of cancellation is determined by their correlation. If landmarks reset position but not heading, this selective intervention may weaken their correlation, thereby reducing shared error and limiting the reduction of goal error even when position error itself is reduced. In contrast, the independent-propagation hypothesis holds that resetting position errors alone is sufficient to reduce goal errors. Two experiments in an immersive virtual environment tested these hypotheses. Participants learned five goal locations and two landmark locations arranged around a designated home location. After walking a two-leg path toward one landmark, they replaced the original goal locations either with or without the landmark visible at the test position. In Experiment 1, landmarks provided positional but not heading information; in Experiment 2, they provided both. The results showed that selectively reducing position error without reducing heading error failed to reduce goal error but decreased the correlation between position and heading errors. In contrast, reducing both errors reduced goal error without altering their correlation. These findings demonstrated that goal-localization errors depend not only on the magnitude of individual self-localization errors but also on their covariance structure, supporting the interactive-propagation hypothesis.
Access status: Open Access ,
Preliminary analysis of the effects of thermal cycling on the mechanical properties of Kevlar®/Epoxy tubular braided composites for use in satellite components
(2026-05-04) Gye, Daniel; Fald, Kyla; Carey, Jason P.; Ead, Ahmed S.
Satellites in low Earth orbit (LEO) are exposed to several hazardous conditions including large temperature fluctuations. Materials with non-zero coefficients of thermal expansion (CTE) can develop thermal stresses that lead to failure. Tubular braided composites (TBCs) are a customizable type of fiber reinforced polymer composite (FRPC) and are manufactured with high-strength fibers and polymer resins to create a cylindrical structure optimal for load bearing applications with a near-zero CTE. Despite this, TBCs have not been used in satellites, nor have they had the effects of thermal cycling on their mechanical behaviour evaluated. This preliminary work studied the effect of relatively low amounts of thermal cycling on the mechanical performance of Kevlar®/Epoxy TBCs to pre-emptively assess their viability in satellite structural applications. Samples made with one of three braid angles (35°,45°, and 55°) were exposed to either zero, five, or 10 cycles between −50℃ and 120℃, before being tensile tested to find their elastic modulus and ultimate tensile strengths (UTS). Thermal cycling decreased the average elastic modulus and UTS of the 35° TBCs by 16.6% and 13.8% after five cycles, and 17.0% and 33.5% after 10 cycles respectively. The 45-degree TBC’s average elastic modulus and UTS increased by 8.9% and 7.3% after five cycles, then decreased by 25.8% and 22.2% after 10 cycles. The 55° TBC’s average elastic modulus and UTS decreased by 9.3% and 25.1% after five cycles, and 30.7% and 36.2% after 10 cycles. Normality and equal variance of the data were verified with Kolmogorov-Smirnov and Bartlett’s tests respectively. Single factor ANOVA tests were also used to verify the significance of change between the mechanical property averages and were succeeded by Tukey’s test to determine which specific pairs of averages were significantly different. Before TBCs can be used in satellites, further evaluation must be performed. This may include variation in materials, greater cycle counts, alternate cycle durations, or different temperature change rates.