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- Contributor(s)
- Joseph Triglav; Erika Howe; Jaskirat Cheema; Blaire Dube; Mark J. Fenske; Nicholas Strzalkowski; Leah R. Bent
- Date issued
- 2019
- Description
- Prolonged sitting, common in many workplaces, reduces blood flow to the lower limb and has negative health outcomes. CoreChair is an active-sitting chair that encourages increased movement to help mitigate these outcomes. Physiological and cognitive measures were recorded in ten participants over four hours of sitting in both the CoreChair and a traditional office chair. Sitting in both chairs led to increases in calf circumference (p
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Yasaman Amannejad; Diwakar Krishnamurthy; Behrouz Far
- Date issued
- 2019
- Description
- Delivering fast response times for user transactions is a critical requirement for Web services. Often, a Web service has Service Level Agreements (SLA) with its users that quantify how quickly the service has to respond to a user transaction. Typically, SLAs stipulate requirements for Web service response time percentiles, e.g., a specified target for the 95th percentile of response time. Violating SLAs can have adverse consequences for a Web service operator. Consequently, operators require systematic techniques to predict Web service response time percentiles. Existing prediction techniques are very time consuming since they often involve manual construction of queuing or machine...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Tracy O'Connor
- Date issued
- 2019
- Description
- In order to stimulate engagement in microbiology, a reading-writing assignment based on a narrative popular science book was created for a one-semester introductory microbiology course. In order to encourage critical thinking, students were required to formulate a question related to the book to research and report on. Active learning was supported by guidance and feedback at each stage of the assignment. The assignment components were graded according to a rubric based on the learning outcomes: reading comprehension, question formulation, literature research, synthesis, and written communication. Median scores for the assignment components indicated that students successfully...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Shawn X. Liu
- Date issued
- 2019
- Description
- In 2008 Alberta Education proposed a change of high school mathematics curriculum from the previous Pure Math-10, 20, 30 and Applied Math-10, 20, 30 to Math 10-C, Math 20-1, Math 30-1, Math 20-2, Math 30-2, Math 10-3 Math 20-3 and Math 30-3. The new high school mathematics curriculum was implemented in 2010 and the first group of high school graduates with this new mathematics curriculum got into the post-secondary institutions in 2013. With the old mathematics curriculum, the prerequisite was Pure Math 30 for the students taking mathematics or statistics courses in science and engineering (including nursing) in any post-secondary institutions in Alberta. With the new mathematics...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Brett McCollum
- Date issued
- 2018
- Type
- article
- Appears in collection(s)
- Science and Technology; Centres & Institutes
- Contributor(s)
- Alice Liboiron; Kendra Garbutt; Lynn Moorman; Dorothy P. Hill; Nisha Panesar
- Date issued
- 2018
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Nicholas Strzalkowski; Aaron D. Chau; Liu Shi Gan; Zelma H. T. Kiss
- Date issued
- 2018
- Description
- The cerebellum is implicated in the pathophysiology of numerous movement disorders, which makes it an attractive target for noninvasive neurostimulation. Continuous theta burst stimulation (cTBS) can induce long lasting plastic changes in human brain; however, the efficacy of different simulation protocols has not been investigated at the cerebellum. Here, we compare a traditional 50-Hz and a modified 30-Hz cTBS protocols at modulating cerebellar activity in healthy subjects. Seventeen healthy adults participated in two testing sessions where they received either 50-Hz (cTBS50) or 30-Hz (cTBS30) cerebellar cTBS. Cerebellar brain inhibition (CBI), a measure of cerebello-thalamocortical...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Brett McCollum
- Date issued
- 2018
- Type
- article
- Appears in collection(s)
- Science and Technology; Centres & Institutes
- Contributor(s)
- Jack K. Leacy; Shaelynn Zouboules; Carli R. Mann; Joel D. B. Peltonen; Gurkan Saran; Cassandra E. Nysten; Heidi E. Nysten; Tom D. Brutsaert; Ken D. O’Halloran; Mingma T. Sherpa; Trevor A. Day
- Date issued
- 2018
- Description
- Neurovascular coupling (NVC) is the temporal link between neuronal metabolic activity and regional cerebral blood flow (CBF), supporting adequate delivery of nutrients. Exposure to high altitude (HA) imposes several stressors, including hypoxia and hypocapnia, which modulate cerebrovascular tone in an antagonistic fashion. Whether these contrasting stressors and subsequent adaptations affect NVC during incremental ascent to HA is unclear. The aim of this study was to assess whether incremental ascent to HA influences the NVC response. Given that CBF is sensitive to changes in arterial blood gasses, in particular PaCO2, we hypothesized that the vasoconstrictive effect of hypocapnia during...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Brett McCollum
- Date issued
- 2018
- Type
- article
- Appears in collection(s)
- Science and Technology; Centres & Institutes
- Contributor(s)
- Cale A. Templeton; Nicholas Strzalkowski; Patti Galvin; Leah R. Bent
- Date issued
- 2018
- Description
- Aim: To examine tactile sensitivity in the leg and foot sole of below-knee amputees (diabetic n = 3, traumatic n = 1), and healthy control subjects (n = 4), and examine the association between sensation and balance. Method: Vibration perception threshold (VPT; 3, 40, 250Hz) and monofilaments (MF) were used to examine vibration and light touch sensitivity on the intact limb, residual limb, and homologous locations on controls. A functional reach test was performed to assess functional balance. Results: Tactile sensitivity was lower for diabetic amputee subjects compared to age matched controls for both VPT and MF; which was expected due to presence of diabetic peripheral neuropathy. In...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Brett McCollum
- Date issued
- 2018
- Type
- article
- Appears in collection(s)
- Science and Technology; Centres & Institutes
- Contributor(s)
- Nicholas Strzalkowski; Ryan M. Peters; J. Timothy Inglis; Leah R. Bent
- Date issued
- 2018
- Description
- Cutaneous afferents convey exteroceptive information about the interaction of the body with the environment and proprioceptive information about body position and orientation. Four classes of low-threshold mechanoreceptor afferents innervate the foot sole and transmit feedback that facilitates the conscious and reflexive control of standing balance. Experimental manipulation of cutaneous feedback has been shown to alter the control of gait and standing balance. This has led to a growing interest in the design of intervention strategies that enhance cutaneous feedback and improve postural control. The advent of single-unit microneurography has allowed the firing and receptive field...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Dale G. Paton; Simone Ciuti; Michael S. Quinn; Mark S. Boyce
- Date issued
- 2017
- Description
- Migrations of large ungulates are globally threatened in environments affected by increasing human disturbance, rising large carnivore predation, deteriorating habitat quality, and changing climate. Animals migrating outside of protected areas can be exposed to greater human pressure, and this effect can be stronger when humans are perceived to be a predation risk, such as during hunting seasons. Using four consecutive years of satellite telemetry data (n = 138 migration events), we compared habitat selection, movement, and behavior of a large partially migratory herbivore while migrating through a heterogeneous landscape in spring and fall. We tested the hypothesis that fall hunting...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Pamini Thangarajah; Peter Zizler
- Date issued
- 2017
- Description
- Let X be a real-valued wide sense stationary process over a finite non-abelian group G. We provide results on optimal orthogonal decomposition of X into real-valued mutually orthogonal components and using this decomposition we develop a test for correlation of X over the group G. Applications of these results to the analysis of variance of the carry-over effects in the cross-over designs in clinical studies are given. Our focus will be on groups S[subscript 3], S[subscript 4], and A[subscript 4].
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Tracy Lee; Kim Good; Winston Jamieson; Michael S. Quinn; Ashok Krishnamurthy
- Date issued
- 2017
- Description
- In Alberta, Canada beef producers share the landscape with large carnivores where interactions can lead to negative outcomes. We had 672 Alberta beef producers complete an online survey in spring 2014 to access the occurrence and outcomes of cattle-carnivore interactions.•We found that a majority (64%) reported losses from carnivore depredation. The average rate of calf depredation was reported at 2%, but the rate was highly variable between producers (ranging from 0 to 25% calf loss annually). The direct annual economic loss to depredation for survey respondents was $2 million. This can be extrapolated with a number of assumptions provincially to $22 million.• Alberta's Wildlife Predator...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Nicholas Strzalkowski; R. Ayesha Ali; Leah R. Bent
- Date issued
- 2017
- Description
- Single unit microneurography was used to record the firing characteristics of the four classes of foot sole cutaneous afferents [fast and slowly adapting type I and II (FAI, FAII, SAI, and SAII)] in response to sinusoidal vibratory stimuli. Frequency (3-250 Hz) and amplitude (0.001-2 mm) combinations were applied to afferent receptive fields through a 6-mm diameter probe. The impulses per cycle, defined as the number of action potentials evoked per vibration sine wave, were measured over 1 s of vibration at each frequency-amplitude combination tested. Afferent entrainment threshold (lowest amplitude at which an afferent could entrain 1:1 to the vibration frequency) and afferent firing...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Michael M. Tymko; Caroline A. Rickards; Rachel J. Skow; Nathan C. Ingram-Cotton; Michael K. Howatt; Trevor A. Day
- Date issued
- 2016
- Description
- Steady-state tilt has no effect on cerebrovascular reactivity to increases in the partial pressure of end-tidal carbon dioxide (PETCO2). However, the anterior and posterior cerebral circulations may respond differently to a variety of stimuli that alter central blood volume, including lower body negative pressure (LBNP). Little is known about the superimposed effects of head-up tilt (HUT; decreased central blood volume and intracranial pressure) and headdown tilt (HDT; increased central blood volume and intracranial pressure), and LBNP on cerebral blood flow (CBF) responses. We hypothesized that (a) cerebral blood velocity (CBV; an index of CBF) responses during LBNP would not change with...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- Katja Hoehn; Elaine Marieb
- Date issued
- 2016
- Description
- Creating a textbook involves ensuring that the content, text, and visual diagrams explain concepts well and as accurately as possible. This includes breaking the text into “bite-sized” palatable chunks that give the students the opportunity to pause, reflect on, and apply what they have learned from each section. The visuals are often just as important as the text; realistic, vibrantly-coloured three-dimensional art is integral for student learning in this subject as it helps to teach the concepts through visualization in addition to theory. The figures must teach well not only on the page, but also when projected on a classroom screen or when viewed on a mobile device. Having a...
- Type
- article
- Appears in collection(s)
- Science and Technology
- Contributor(s)
- V. J. Cox; G. R. Fox; A. B. Jacobsen; R. J. Kelly; Alice Liboiron; J. R. Henderson; Dorothy P. Hill
- Date issued
- 2016
- Description
- The Crown of the Continent Ecosystem (CCE) encompasses a 72,000 sq. km area of the Rocky Mountains in southwestern Alberta, southeastern British Columbia, and northwestern Montana. Known for its biodiversity, including a full compliment of mammalian carnivores, managing this ecosystem across many jurisdictional boundaries is challenging. With many stakeholders involved in the Crown of Continent Ecosystem, tracking the research being conducted in this area is essential. This publication includes an annotated bibliography of more than 250 research documents published between between 2000-2015 and makes recommendations as to which areas and topics require further study within the Crown of...
- Type
- article
- Appears in collection(s)
- Science and Technology