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Skip to Search Results- 2Atai, Ali Asghar.
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Confined Uniaxial Compaction Observing Triaxial Response of Granular Media under Quasi-static Loading Conditions
DownloadFall 2019
Experimental studies have been carried out in this thesis to enhance the understanding of granular material failure by observing the effects of particle size on material properties. Understanding the granular behaviour of materials is important in pharmaceutical research, product quality in the...
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Fall 2022
Plesiosaurs were a diverse group of Mesozoic marine reptiles, notable among both extinct and extant animals for their unique body planform. Despite being known for more than 300 years, many aspects of their locomotion and behavior remain as mystery. Unlike any other flapping species, plesiosaurs...
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Constructing Continuous Strain and Stress Fields from Spatially Discrete Displacement Measurements in Soft Materials
DownloadFall 2015
Recent studies show that particle tracking together with moving least-square (MLS) method is capable to interpolate displacement field and to determine strain and stress fields from discrete displacement measurements in soft materials. The goal of this study is to evaluate of the numerical...
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Continuum Based Modeling and Analysis for the Mechanics of Fiber Reinforced Hyperelastic Composite Material: Plane, Out of Plane Response and Pseudo-elasticity
DownloadFall 2023
In recent days, hyperelastic composites (i.e., elastomeric composites reinforced with fibers) have shown promising outcomes in various engineering applications involving tissue engineering, shape-morphing structures, microfluidics, wearable devices, biomechanics, and soft robotics. Typically,...
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Continuum Modelling and Analysis of a Class of One and Two Dimensional Elastic Metamaterials with Local Rotation
DownloadFall 2022
The group of materials classified as "metamaterials" have accrued great interest in the scientific community as of late for their potential to revolutionize several multidisciplinary applications. Metamaterials are defined as synthetic/man-made materials which have been engineered to possess a...
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Fall 2016
Lipid membranes represent a critically important interface in biological cells and cellular organelles and mediate all interactions between cells and their surrounding environment. Although quite fragile and negligibly thin, they can be homogeneous down to molecular dimension. Consequently, their...
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Fall 2023
Conventional control of an articulated manipulator such as robot arms involves the use of sensor measurements of joint values to calculate the position and orientation of the end-effector and to perform motion control. Conversely, in cases where direct sensing is not available, a vision-based...
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Control-Oriented Modeling and System Identification for Nonlinear Trajectory Tracking Control of a Small-Scale Unmanned Helicopter
DownloadSpring 2014
Model-based control design of small-scale helicopters involves considerable challenges due to their nonlinear and underactuated dynamics with strong couplings between the different degrees-of-freedom (DOFs). Most nonlinear model-based multi-input multi-output (MIMO) control approaches require the...
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Fall 2019
Canada is committed to reducing its greenhouse gas (GHG) emissions to mitigate the effects of global warming. A major source of GHG emissions is coal-based power generation. Replacing (fossil) coal with biomass-based feedstocks for the generation of electricity could help reduce these emissions....