Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 63 for “"Grand Challenge"”.
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Making a grand challenge: the social-symbolic work of conserving nature
… unwieldy. Scholars are called upon to study how grand challenges like these develop and how organisations respond to them. Scholars and practitioners alike tend to focus on the received and ostensibly objective facts of these challenges, obfuscating the role actors play in socially constructing …
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Shifting the frame: how internal change agents contextualize and co-construct strategic responses to grand challenge issues within and beyond the firm
… business responses to social-ecological grand challenges. Prior research has suggested that problem identification and attribution help to foster meaning and action on societal issues. In particular, framing theory has offered significant insight into individual actors' cognitive …
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Two Minds for One Vehicle: A Case Study in Deliberative and Reactive Navigation
… with two nearly identical vehicles in the DARPA Grand Challenge afforded a practical opportunity for such a case study. Both base vehicles were developed by modifying Club Car Pioneer XRT 1500 on-demand four wheel drive base platforms. Cliff was designed to use the reactive paradigm, while Rocky …
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The relative effects of perceived company ethics versus remuneration package satisfaction on employee engagement
… unethical ways. This research answers the grand challenge in terms of which one of the employee engagement influencing forces of perceived company ethics and remuneration package satisfaction are stronger influences by using a quantitative approach. The financial services industry has been …
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Towards engineering living functional materials
… fertilizers that promote plant growth. The grand challenge to bridge the concept-to-product gap is twofold: scalability and safe deployment. First, most model microorganisms cannot produce a macroscale matrix to sustain themselves as standalone devices. The field of engineered living …
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Catalytic conversion of methane to partially oxidized products over copper-exchanged zeolites
… of methane to liquid oxygenated compounds is a grand challenge in catalysis. Although natural gas can be processed industrially in large-scale facilities, new catalytic processes are required that economically directly convert methane to liquid products in small-scale units to exploit highly …
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Nanocrystal Synthesis and Thin Film Formation for Earth Abundant Photovoltaics
… to on-demand energy at the global scale is a grand challenge of our time. The fabrication of solar cells from nanocrystal inks comprising earth abundant elements represents a scalable and sustainable photovoltaic technology with the potential to meet the global demand for electricity. Solar …
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Measurement and modeling of brain tissue and engineered polymer response to concentrated impact loading
… brain tissue mechanics. While this is a grand challenge that many have sought to address, this need is acute when considering spatially localized deformation of brain tissue under high rates, such as in collisions that cause traumatic brain injury (TBI). This thesis sought to address this …
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Development of Neural Networks for Biomolecular Structure Prediction with Applications to Protein Design
A grand challenge in biology is to create computational models of the interactions betweenabitrary biomolecular structures. In this dissertation, I describe the development of neural network models for predicting the structure of biomolecular complexes including proteins, nucleic acids, and small …
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De novo design of protein binders as functional therapeutics
… target structure information alone remains a grand challenge. A general computational design framework includes (1) generation of binder backbones, (2) sequence design and side-chain refinement, (3) resampling, and (4) prediction of binding and evaluation of the minibinders as a monomer. In …
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Arc Path Collision Avoidance Algorithm for Autonomous Ground Vehicles
… (IGVC) and on our 2004 entry into the DARPA Grand Challenge. The arc path model was used because of the simplicity of the calculations and because it can accurately represent the base kinematics for Ackerman or differentially steered vehicles. Clothoid curves have been used in the past to …
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Investigation on advanced image search techniques
… rule. Experimental results on four large scale, grand challenge datasets have shown that the proposed oRGB-SIFT descriptor improves recognition performance upon other color SIFT descriptors, and the CSF, the CGSF, and the CGSF+PHOG descriptors perform better than the other color SIFT descriptors. …
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Face recognition using multiple features in different color spaces
… machine learning. The recent Face Recognition Grand Challenge (FRGC) program reveals that uncontrolled illumination conditions pose grand challenges to face recognition performance. Most of the existing face recognition methods use gray-scale face images, which have been shown insufficient to …
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Statistical Scheduling of Economic Dispatch and Energy Reserves of Hybrid Power Systems with High Renewable Energy Penetration
… energy reserves will contribute to the emerging grand challenge of renewable energy integration into the existing power system facilities.</p> <p>A genetic algorithm based approach is used for solving the minimization of the power operating cost. The IEEE 24-bus reliability test system …
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Texture-Informed Approach for Hurricane Loss Estimation: How Discounting Neighborhood Texture Leads to Under-Valuing Wind Mitigation
… and recovery to predisaster mitigation. And, a grand challenge in championing for this shift is effectively communicating natural hazard risks and the value of mitigating structures (to reduce those risks). Present tools for loss estimation overlook building-level variations in wind loading …
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“A resource in and of itself”: Grid-scale Batteries and the Politics of Storage
… Power Plants’ to the US’s Energy Storage Grand Challenge, grid-scale batteries – which attach to the electricity grid to buffer supply and demand – are sites of intensifying research, speculation and legislation. They are increasingly positioned as a transformative means to mitigate and …
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Hierarchy Aligned Commonality Through Prototypical Networks: Discovering Evolutionary Traits over Tree-of-Life
A grand challenge in biology is to discover evolutionary traits, which are features of organisms common to a group of species with a shared ancestor in the Tree of Life (also referred to as phylogenetic tree). With the recent availability of large-scale image repositories in biology and advances in …
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Accelerating Atmospheric Modeling Through Emerging Multi-core Technologies
… program complexity. Atmospheric modeling is a grand-challenge problem that could make good use of these architectures if they were more accessible to the average programmer. To that end, software tools and programming methodologies that greatly simplify the acceleration of atmospheric modeling …
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Reactive Navigation of an Autonomous Ground Vehicle Using Dynamic Expanding Zones
… through unstructured terrain presents many challenges. The task becomes even more difficult with increasing obstacle density, at higher speeds, and when a priori knowledge of the terrain is not available. Reactive navigation schemas are often dismissed as overly simplistic or considered to …
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Regularization methods on solving Poisson’s equation and Poisson Boltzmann equation with singular charge sources and diffuse interfaces
Numerical treatment of singular charges is a grand challenge in solving Poisson-Boltzmann (PB) equation for analyzing electrostatic interactions between the solute biomolecules and the surrounding solvent with ions. For diffuse interface models in which solute and solvent are separated by a smooth …
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