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.
Results
Showing 1 to 20 of 354 for “"Criticality"”.
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Alternative Methods in Criticality
In this thesis two new methods of calculating the criticality of a nuclear system are introduced and verified.
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Targeting Theory: Criticality and The City
… critical thinking, targeting raises a problem of criticality with the selective eradication of boundaries that, while suggesting flow, might fail to account for socio-political or ideological implications. This thesis highlights the transitivity in targeting which exposes the flow of networks as …
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Criticality and parallelism in combinatorial optimization
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Self-organized criticality in neuromorphic nanowire networks
L'abstract è presente nell'allegato / the abstract is in the attachment
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The Nature of Asymmetry in Fluid Criticality
… of the nature of asymmetry in fluid criticality, especially for vapor-liquid equilibra in one-component fluids and liquid-liquid equilibra in binary fluid mixtures. The conventional mixing of physical variables in scaling theory introduces an asymmetric term in diameters of …
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Hybridized Criticality and Elementary Excitations in LiHoF4
… properties of LiHoF<sub>4</sub>. Quantum criticality in rare earth ferromagnet LiHoF<sub>4</sub> is complicated by the presence of strong crystal field and hyperfine interactions resulting, e.g., in incomplete mode softening reported by Rønnow et al. We construct a systematic framework for …
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Fission Multiplicity Distribution Sampling in MCNP6 Criticality Calculations
… neutron energy spectrum is conserved, the criticality of a system remains the same without regard to the actual physical fission process. However, the fissioning of a nucleus leads to the emission of any number of neutrons with some probability with correlated emission energies that is a …
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Characterizations of plutonium nitrate solutions for criticality calculations
In the modeling of plutonium nitrate systems for criticality calculations, the chemical formula is usually assumed to be Pu(N03)4 (where plutonium is in the +4 valence state). However in a unique situation of chemistry, plutonium has four oxidation states (III), (IV), (V), and (VI) that can exist …
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Dynamic Criticality Analysis of Industrial Assets and System
… to identify their “critical” assets. Criticality analysis, a well-recognised method for providing a systematic basis for deciding what assets should have priority within a maintenance management process, is used for this purpose. Evidence from industrial practices reveals that although …
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Modeling Freight Network Robustness and Criticality in Ontario, Canada
This dissertation explores criticalities that arise in a freight transportation network for the multi-regional economically active province of Ontario, Canada. A significant economic contributor and generator of freight trips, Ontario relies on its transportation system for the movement of goods. A …
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MCFlow: Middleware for Mixed-Criticality Distributed Real-Time Systems
… from these assumptions, several \emph{mixed-criticality scheduling} approaches have been proposed. However, to date there has been no quantitative comparison of system schedulability or run-time overhead for the different approaches. In this dissertation, we present what is to our knowledge …
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Criticality and thermal analyses of separated actinides in transmutation
… of a large amount of radiation. A neutron criticality code was used to determine the effective neutron multiplication factor for varying quantities of curium and americium oxide held within spherical or cylindrical containers. These geometries were investigated both in air and in water. …
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Aspects of quantum criticality in itinerant electron ferromagnetic systems
… We apply a standard theory of itinerant quantum criticality to a quantum-critical end-point in a three-dimensional ferromagnet, before speculating on ZrZn\(_2\) being a test-bed of our results. Then we consider two explanations for the appearance of a first-order phase transition at low …
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Assessing the criticality of germanium as a by-product
… a critical metal. Current methods for assessing criticality include frameworks that rely on geopolitical risk metrics, geological reserves, substitutability, and processing limitations during extraction among others but there is a gap in understanding the complex supply and demand dynamics that …
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Predicting and identifying signs of criticality near neuronal phase transition
… data recorded in anaesthetised rats. The criticality hypothesis associated with brain state change is examined using neuronal avalanches for experimentally recorded rat local field potential (LFP) data and mean-field pseudoLFP simulation data. We compare three different implementations of …
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A team coaching model for developing criticality in undergraduate students
… to facilitate critical dialogue and develop criticality in student-team work. It explored three unconnected areas: criticality, critical dialogue and team coaching. The paucity of studies in critical dialogue in undergraduate business education, the overarching definition of coaching in …
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Impact of nuclear data libraries for criticality calculation of HTGR
… among evaluated nuclear data libraries affect criticality calculation for High-Temperature Gas-cooled Reactors (HTGR). Accurate nuclear data is essential for reactor safety analysis. However, previous studies have reported significant differences in calculated keff for HTGR systems when …
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Exotic phases and quantum criticality in gapless correlated electron systems
In this thesis, I theoretically studied exotic phases of matter than arise due to strong interactions between electrons in three different scenarios. Firstly, at a stripe melting phase transition, which may be relevant for the high temperature superconductors, where we propose a specific type of …
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Effects of alcohol and error criticality on alphanumeric target acquisition
… system was used to define low- and high-criticality search trials. Search time, touch accuracy, the number of trials completed, percent "give-ups," and hand travel time were all significantly degraded by the alcohol dosages used. An alcohol-by-criticality interaction was observed for …
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Divergent Criticality – A Mechanism of Neural Function for Perception and Learning
… or ‘self- organising’ mechanism – Divergent Criticality. The methodology incorporated three studies: Pilot, Developmental and Exploratory. Over the three studies, Divergent Criticality was tested by developing a functional Affordance measure to address the Research Question – are perceptions …
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