1,710 research outputs found
Improvement of direct methanol fuel cell performance using nove PtRu nanowire network as an anode material
No full textAn application of polarized domains in ferroelectric thin films using scanning probe microscope
No full textThe feasibility of utilizing PZT films as future data storage media was investigated using a modified AFM. Applying voltages between a conductive AFM tip and the PZT films causes the switching of ferroelectric domains. The domains are observed using an EFM imaging technique. The experimental results and calculations revealed that the electrostatic force generated between the polarized area and the tip is a main contributor for the imaging of the polarized domains. The written features on ferroelectric films were less than 100 nm in diameter, implying the possibility of realizing data storage devices with ultra-high area density. The disappearance of the polarized images without any applied voltage was observed, which is a drawback in this application of PZT thin films.X1120sciescopu
The influence of high-intensity exercise training on the W(lim)-T(lim) relationship
No full textWhen exercise to exhaustion is performed using at least two different intensities, work to fatigue (W(lim)) can be expressed as a linear function of time to fatigue (T(lim)). Whereas the slope of this function is related to endurance ability, the y-intercept is associated with the potential to perform high intensity interval exercise. The purpose of the present investigation was to determine the influence of 8-wk intermittent high-intensity exercise training on the y-intercept derived from the W(lim)-T(lim) relationship. Eight healthy, untrained male students (19.1 +/- 0.6 yr) completed five 60-s bouts of maximal exercise on the cycle ergometer, three times a week, for 8 wk. Seven controls avoided regular activity for the same period. Prior to and immediately following the training period, the W(lim)-T(lim) relationship, VO2max, and total work completed in five 60-s exercise bouts on the cycle ergometer were determined. Correlational analysis established relationships between the y-intercept and total work accomplished in the interval test pre- (r = 0.90; P < 0.01; N = 15) and post-training (r = 0.92; P < 0.0 1; N = 15), confirming that the y-intercept is related to the ability to perform exercise of this nature. Moreover, the ''anaerobic'' energy yield, calculated from total work and oxygen consumed during the interval exercise, was also related to the y-intercept (r = 0.78; P < 0.01). Interval training significantly increased both the y-intercept (P = 0.0015) and total work accomplished in the interval test (P = 0.001), while the slope of the W(lim)-T(lim) relationship (critical power) remained unchanged. Changes in the y-intercept were correlated to changes in total work accomplished (r = 0.85; P < 0.01). Furthermore, peak post-exercise plasma lactate concentration resulting from the interval task increased from 12.2 +/- 1.6 to 16.3 +/- 0.9 mmol.-1 (P = 0.003), while oxygen consumed during this exercise demand was not significantly changed with training (P = 0. 166). The present study has demonstrated that not only does the y-intercept of the W(lim)-T(lim) relationship provide a measure of the ability to undertake repeated bouts of maximal, high intensity exercise, but that this particular characteristic is also responsive to exhaustive interval training
Lim brothers: owner-operators of W.K. Gardens
No full textArticle about W.K. Gardens restaurant. Original submission for "The BC Almanac Book of Greatest British Columbians" by Mark Forsythe and Greg Dickson (Harbour Publishing, 2005), p.136-137.https://viuspace.viu.ca/bitstream/handle/10613/2910/WK%20Gardens.pdf?sequence=
Problem Based Learning in Medical Education: Handling Objections and Sustainable Implementation
No full textWilliam K Lim Department of Paraclinical Sciences, Faculty of Medicine and Health Sciences, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, 94300, MalaysiaCorrespondence: William K Lim, Email [email protected]: The introduction of problem-based learning (PBL) in 1969 is considered the greatest innovation in medical education of the past 50 years. Since then, PBL has been implemented in different educational settings across virtually all health professions. However, some PBL schools gradually faced resistance from academic staff who were more familiar with traditional teacher-centred curricula. At times this has resulted in reversion to tradition or compromise whereby PBL is implemented within a lecture-based curriculum. Resistance can also emerge in a traditional school when a PBL curriculum is being considered for implementation. One of the first signs of this erosion is doubts about PBL raised in the form of objections or criticisms. This perspective review describes eight objections raised to assert why PBL is inferior or untenable. The background to each objection is provided together with evidence-informed rebuttals derived from professional practice and the published literature. Best practices are discussed for sustainable management of a PBL-based curriculum. A well-implemented PBL curriculum with appropriate and cost-effective infrastructure, training, teaching-learning activities, and assessment will position schools to harness the full benefit of PBL in training medical and health professionals.Keywords: problem-based learning, lecture-based curriculum, educational philosophy, facilitator, traditional lecture
A PARAMETER-IDENTIFICATION METHOD FOR ROBOT DYNAMIC-MODELS USING A BALANCING MECHANISM
No full textX111sciescopu
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