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2024 — Dielectric characterization of materials and lossy filter design using reflected group delayRésumé
Filters play a significant role in different types of communication systems such as radars, cellular mobile and satellite communication. They are helpful in improving the performance of a communication system by restricting the transmission to the intended frequency band and rejecting the interfering signals from outside. Filters are expected to provide distortion free transmission to the signals in the passband and thus require flat in-band response and an adequate amount of out-of-band rejection. Filter technologies employing coaxial, waveguide and dielectric resonators can meet these requirements but at the cost of large size. Low loss in these filter technologies can be … Lire la suite
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2017 — Randomized Control Trial of the Efficacy of Parent-Directed Presurgery Shaping and Exposure to Anesthetic Mask for Prevention of Preoperative Anxiety in ChildrenRésumé
The detrimental effects of children’s anxiety during anesthesia induction are welldocumented. Though pharmacological approaches (e.g., sedative) are efficacious, they have potential negative consequences. As such, non-pharmacological approaches (e.g., parental presence, anesthetic mask exposure) may be preferable. Recent research has demonstrated the utility of a parent-directed intervention involving exposure to the anesthetic mask in increasing child compliance and decreasing anxiety at anesthetic induction. In the mentioned study, anesthetic mask exposure occurred on the day of surgery, and employing the mask exposure intervention earlier may be beneficial. The current randomized control trial examined the efficacy of parent/guardian-directed anesthetic mask exposure and shaping … Lire la suite
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2014 — SNAP® for Schools: Impact on Internalizing SymptomsRésumé
Stop Now And Plan (SNAP®) is an empirically supported cognitive behavioural program for children identified as at-risk who present with externalizing problems. The purpose of this investigation was to examine the effectiveness of the SNAP® Schoolbased program as a universal prevention program for non-identified children, specifically, the effectiveness of the program for reducing emotion dysregulation, intolerance of uncertainty, anxiety sensitivity, and other internalizing symptoms. It was hypothesized that the SNAP® School-based program would reduce emotion dysregulation, and would reduce internalizing constructs such as intolerance of uncertainty and anxiety sensitivity in non-identified, school-aged children. The sample included 65 children (Meanage= 8.05, … Lire la suite
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2025 — ‘My spirit is fed’: Exploring land-based, culturally appropriate active living strategies to facilitate holistic well-being among on-reserved youth: A Smart Platform studyRésumé
A constructivist grounded theory approach with an Indigenous lens was used for a qualitative analysis of questions on culture, mental health, physical activity, and land-based activities. This analysis was undertaken as a part of the Smart Platform: Smart Indigenous Youth (SIY) project. The goals of the SIY were to increase physical activity using a cultural land-based active living intervention along with a technological component through an app. This thesis focused on the impact of the intervention on the mental health of on-reserve Indigenous youth in southern Saskatchewan; eleven on-reserve Indigenous youth shared their perceptions in focus groups before and after … Lire la suite
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2016 — Beliefs about the Healthfulness of Common FoodsRésumé
The primary focus of this research was to evaluate beliefs about the healthfulness of common foods. There is widespread agreement that a whole foods, plants-based diet, such as that depicted by Canada’s Food Guide, promotes optimal health. However, many processed foods are marketed with nutrition messages that are purportedly designed to assist people in making healthier food choices, but may in fact be misleading. This study evaluated beliefs about the healthfulness of 30 common foods across three categories, whole, processed, and highly processed foods, and compared them to an objective measurement of nutritiousness. An array of food choice items, including … Lire la suite
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2025 — Determinants of food choice: The role of nudging, affective forecasting, habitual behaviour, and valuesRésumé
Modern eating habits have created a tremendous burden of disease in Canada and other western countries. There is a large research literature that has investigated interventions for improving dietary health in the population, including work that focuses on rational or conscious factors (e.g., the provision of health information) and heuristic factors (e.g., social norms and priming healthier food choices). More broadly, researchers have worked to identify determinants of food choice to better understand why people select particular foods, resulting in an array of known factors that in some way predict food choice. The current research was designed to examine and … Lire la suite
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2020 — Experimental and Numerical Studies of Solvent Non-Equilibrium Dissolution and Exsolution Behavior in a Heavy Oil SystemRésumé
One of the most important mechanisms of foamy oil is the solvents’ non-equilibrium dissolution and exsolution behavior. Therefore, the real-time capturing of these dynamic properties is crucial in analyzing how foamy oil evolves under non-equilibrium state. In this research, various of solvent dissolution and exsolution tests were conducted in real-time visualization systems for direct quantifications of foamy oil behavior. Test conditions include visualization in both bulk phase and porous media. For bulk phase, visualization tests were realized in a high-pressure Hele-Shaw-like visual cell, and for porous media, a high-pressure etched glass micromodel was used. Tested solvent-heavy oil systems include CO2-heavy … Lire la suite
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2018 — Optimizing Rough Set Flow Graph InferenceRésumé
Bayesian networks (BNs) are a tool for managing uncertainty. A BN consists of a directed acyclic graph (DAG) and a corresponding set of conditional probability tables (CPTs). The probabilistic conditional independencies encoded in the DAG indicate that the product of the CPTs is a joint probability distribution. A central step in probabilistic inference is to eliminate variables. More specifically, every variable in the BN, but not appearing in a given query, must necessarily be eliminated. Eliminating these variables in any order will yield a correct result. It is well-known, however, that the order in which these variables are eliminated can … Lire la suite
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2016 — A Study of Petrography, Fluid Inclusions and Graphite Alteration of the Phoenix Uranium Deposit, Athabasca Basin, Northern Saskatchewan, CanadaRésumé
The Phoenix unconformity-related uranium (URU) deposit, located in the southeastern Athabasca Basin, is associated with a NE-trending, moderately SE-dipping reverse fault crosscutting the unconformity between the Proterozoic Athabasca Group and the Archean – Paleoproterozoic basement. The mineralisation occurs mainly along the faulted graphite zones or at the intersection of the faults and unconformity and is associated with pervasively developed tourmaline alteration. Primary aqueous fluid inclusions were studied in post-diagenetic, pre- to syn-mineralisation quartz overgrowths and vug-filling drusy quartz in sandstone (QBSN2), and syn- to post-mineralisation, veinfilling coarse-grained drusy quartz in both sandstone (QBSN3) and basement (QBSM4). Only a few liquid-dominant … Lire la suite
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2016 — Development of multi-stage fractional programming methods for electric power system planning under uncertaintyRésumé
For electric power systems, although satisfying soaring power demand is critical for regions and countries, climate change mitigation by reducing carbon emissions is one of major challenges. Consequently, the primary obstacle for electric power system management is to tackle the trade-off between economic and environmental issues. Moreover, electric power systems exhibit a great number of complexities, associated with uncertainties and dynamics in system components, parameters and their interactions, such as future end-user demand, emission amounts and system violation. Therefore, efficient programming techniques are desired to deal with these uncertainties and complexities of the dual-objectives for maximizing economic profits and minimizing … Lire la suite
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2023 — Depositional environment and hydrothermal-diagenetic history of pre-salt carbonate in an Early Cretaceous rifted basin, offshore BrazilRésumé
This study aimed to reveal the depositional and hydrothermal-diagenetic history for the sampled carbonates of the Macabu Formation, in Campos Basin, offshore Brazil. It also investigated the possible alteration conditions affecting these rocks, including: temperature, water pH, pCO2, and fluid origins. The carbonates of the Macabu Formation and their equivalent formations are commonly reported with lithologies composed of stevensite, spherulitic calcite, shrub-like calcite, dolomite matrix, and different forms of silica formed from hydrothermal alteration. However, no spherulite and shrub-like calcite have been observed in the samples investigated herein from well S2. The lithologies of the Upper and Lower units are … Lire la suite
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2019 — Sound Radiation Responses and Acoustic Behvior of Sandwich PanelRésumé
Sandwich structures with decent sound insulation and absorption properties have been widely used in the engineering fields such as aerospace engineering, marine engineering and civil and construction engineering. Investigations on the acoustic behavior of sandwich structures is of practical importance, not only for engineers but to researchers in the field. A numerical study of the vibro-acoustic and sound transmission loss (STL) of an aluminum honeycomb core sandwich panel with fabric-reinforced graphite (FRG) composite face sheets is performed in the present research. The honeycomb sandwich structure, faced with an FRG composite face sheet, has acoustic advantages over other types of sandwich … Lire la suite
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2024 — Application of data-driven and physics-driven models in predicting vibratory responses of nonlinear dynamic systemsRésumé
The investigation of chaotic vibrations is essential for understanding the vibro-responses of engineering structures subjected to external excitations. This understanding is crucial for developing advanced strategies to control chaotic structural instability and sensitivity. Traditional methods for investigating chaotic vibration behavior rely on physics-based model establishment, where physical models are mathematically analyzed through complex calculations of differential equations. Although the development of analytical and numerical theories is relatively mature, the costly human labor required for feature engineering and high demands for expert knowledge in mathematical and physical domains limit its application in engineering fields to a certain extent. Therefore, this research … Lire la suite
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2016 — On the Changes and Influences of the Absolute Truth of Neo-Confucianism in Pre-Modern ChinaRésumé
The following paper focuses on the changes and influences of the absolute truth of Neo-Confucianism in pre-modern China. First of all, Li of Neo-Confucianism attempted to replace the highest divine of Tian/Shangdi but actually became the amalgamation with the divine and the absolute truth. Through the resistance against Li by Chinese thinkers, the principles of Li were replaced by the idea of “public” as the highest truth of political ideology in the late pre-modern China. However, those thinkers did not break the “continuative mode of thought” which was the way of thinking of the absolute truth of Li, and “the … Lire la suite
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2016 — Formulations of Shadowed Sets and Three-Way Approximations of Fuzzy SetsRésumé
A three-way, three-valued, or three-region approximation of a fuzzy set is constructed from a pair of thresholds ( ; ) with 0 < 1 on its membership function. An element whose membership grade equals to or is greater than is put into the positive region, an element whose membership grade equals to or is less than is put into the negative region, and an element whose membership grade is between and is put into the boundary region. A fundamental issue in constructing such three-way approximations is the interpretation and determination of a pair of thresholds on the unit interval [0; 1]. … Lire la suite
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2016 — Development of Fractional Programming Methods for Environmental Management Under UncertaintyRésumé
Rapid economic development and population growth has accelerated environmental degradation and resource scarcity. There is growing recognition of the importance of environmental conservation and sustainable development. Sustainable environmental management may benefit from integrating a variety of factors into decision-making processes, such as economic, environmental, social, technical, legislative, and political considerations. Moreover, environmental systems are often involved in a multitude of uncertainties, which significantly intensifies the complexity of systems analysis. In this thesis, a set of fractional programming methods are developed to solve multiobjective environmental management problems under uncertainties. Factorial analysis is introduced to explore the interactions of uncertain system parameters … Lire la suite
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2015 — Factorial Probabilistic Methodologies for Water Resources and Hydrologic Systems Analysis Under Interactive UncertaintiesRésumé
Water resources issues have become increasingly prominent worldwide. Optimization and simulation techniques are recognized as powerful tools to deal with water resources issues in an effective and efficient way. Nevertheless, various uncertainties and complexities exist in water resources and hydrologic systems, posing significant challenges to water resources planning and hydrologic predictions. Advanced optimization and simulation methodologies are thus desired to address the challenges involved in solving complex water resources problems. In this dissertation research, a set of factorial probabilistic methods have been developed, which mainly deal with two types of problems: one is the inexact optimization for water resources planning … Lire la suite
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2016 — An Experimental Study of CO2 Dissolution into a Heavy Oil Without or With a Porous MediumRésumé
In this thesis, phase behaviours of three different solvents (i.e., CO2, CH4, and C3H8) in the Colony and McLaren heavy oils were experimentally studied. The diffusivities of CO2 in the Colony heavy oil without or with an unconsolidated porous medium at different initial pressures and a constant temperature were measured and compared. In addition, the temperature dependence of the CO2 diffusivity in the Colony heavy oil was noted. Three different theoretical diffusion models for determining the diffusivity of a solvent in a liquid phase were applied and analyzed. More specifically, first, two series of PVT tests of the Colony heavy … Lire la suite