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 47 for “"blocky"”.
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Three-dimensional numerical manifold method simulations for blocky rock analysis
After decades of development, people realize that there are wider and more various applications of numerical modeling and analysis. However, current feasible software tools cannot satisfy engineering and commercial goals. Therefore, a new generation of numerical modeling and analysis is imminent. …
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Chemical and Physical Modifications of Semicrystalline Gels to Achieve Controlled Heterogeneity
… a novel post-polymerization method to prepared blocky copolymers, and the effect of copolymer architecture on membrane physical properties, structure, and performance is extensively investigated. First, the blocky sulfonation of PEEK was explored to prepare blocky copolymers (SPEEK) with densely …
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Tailored Chain Sequences of Brominated Syndiotactic Polystyrene Copolymers via Post-Polymerization Functionalization in the Heterogeneous Gel State
This dissertation demonstrates the preparation of blocky brominated syndiotactic polystyrene (sPS-co-sPS-Br) copolymers with tailored chain sequences using a simple, post-polymerization functionalization method conducted in the heterogeneous gel state, and investigates the effect of sPS reaction …
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The Effect of Ionomer Architecture on the Morphology in Gel State Functionalized Sulfonated Syndiotactic Polystyrene
This dissertation presents a discussion of blocky and randomly functionalized sulfonated syndiotactic polystyrene copolymers. These copolymers have been prepared over a range of functionalization (from 2% to 10%) in order to assess the effect of the incorporation of these polar side groups on both …
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Synthetic Design of Multiphase Systems for Advanced Polymeric Materials
… homopolymer and generates a copolymer with a blocky microstructure. Solution-state functionalization yields random copolymers which provide matched sets to the blocky analogs for fundamental investigations into the effects of polymer microstructure on material properties. Halogenating PEEK …
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Crystallization Behavior, Tailored Microstructure, and Structure-Property Relationships of Poly(Ether Ketone Ketone) and Polyolefins
… the influence of microstructure (random versus blocky) of functionalized semi-crystalline polymers on physical and chemical properties, and 3) understand the influence of additive manufacturing process parameters on semi-crystalline polymer crystallization and final properties. All objectives …
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Techniques in Ambiguity
… to generating form through loosely associated, blocky parts. However, the thesis proves - through a vast series of investigations - that there is still room to explore smooth envelopes and gradients from the 90s project - as it relates to the creation of ambiguity - with the discrete, primitive …
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Numerical Validation and Refinement of Empirical Rock Mass Modulus Estimation
… rock mass quality, as defined by GSI, including "Blocky\Disturbed\Seamy" rock masses, "Very Blocky" and relatively competent rock masses are analyzed using discretely fractured numerical models. In particular the focus is on tunnel response. Tunnel closure in these simulations is compared to …
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Diagnetic modelling in Middle Jurassic clastic sediments from the Ravenscar group, Yorkshire, and the Brent group, northern North Sea
… cements and precipitated dense pockets of blocky kandites. These sediments were little affected during continued burial. However, their Recent weathering may have dissolved carbonates and feldspars as well as neomorphosing chlorite to vermiculite.The reservoir rocks of the Ninian Field have …
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An investigation of two periglacial landforms on ignimbrite blockslopes in Kluane National Park and Reserve, Yukon Territory
… of Campsite Peak above the treeline, mantling a blocky open matrix of ignimbrite cobble-to-boulder material. BSTs differ from expected solifluction characteristics by showing apparent periodicity, large sample sizes, oblique orientations relative to their slope, and material too coarse to support …
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Lithofacies of the Pliocene-Pleistocene Lucayan Limestone, Great Abaco Island, Little Bahama Bank
… observed included equant granular, equant blocky, drusy, meniscus, and needle fiber "whisker" cements. These cements reflect a variety of diagenetic environments such as the vadose, meteoric, and phreatic zones. It is not possible to use the cement types to define past sea level positions. …
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Petrology, geochemistry, diagenesis and depositional environment of the Upper Devonian - Lower Carboniferous Exshaw Formation, northwestern Alberta.
… two informal units. The lower unit consists of a blocky, calcareous, pyritic shale with chert-rich laminations. This unit is generally more competent than that of the upper more fissile, non- to slightly calcareous shale. (Abstract shortened by UMI.)Dept. of Earth Sciences. Paper copy at Leddy …
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Overcoming the limits of strain-induced martensitic transformation in metastable face-centered cubic alloys
… hardening while mitigating the formation of blocky HCP-martensite. Future suggestions for metastable alloy design are also proposed based on the current experimental and theoretical understandings.
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Review of Underground Tunneling Techniques at the New Irvington Tunnel in San Francisco, California and the Virginia and Truckee Railroad in Virginia City, Nevada
… failure zone. The west side of the tunnel has a blocky joint condition with the joints crossing each other. The joint orientations on the east side are parallel to each other and the material is of a higher degree of alteration. This is assumed to be the cause of failure on the east end of Tunnel …
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Effects of Thermal Treatments on Perfluorosulfonate Ionomer Membranes
… Î H value, which might also be related to its blocky nature. These results show that the isothermal crystallization kinetics of PFSI is affected by the counterion attached to the sulfonate group, the length of side chain, the mole% of side chains and the nature of the membrane. Water uptake …
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Beneficial Reuse of Dredged Materials in Upland Environments
… developed which partially disintegrated into a blocky structured, oxidized horizon with an abundance of redoximorphic features. During the study period, the soil chemistry of the weathering dredged materials shifted from Na-dominated to Ca and Mg-dominated system, allowing plant invasion. In the …
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The effect of solution heat treatment on the tensile and creep properties of MarM-002
… the y' can be composed of coarse lamellae or blocky y' precipitates. Increasing the volume fraction of fine y' by dissolving the coarse eutectic y' during solution treatment can raise the alloy strength. In practice the solution heat treatment temperature does not usually exceed 1220°C because …
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Organism of options : a design strategy for flexible space
… designed in the name of flexibility are blocky, boring, and actually quite inflexible because of incomplete systems, or simple bad planning. A space is designed and built to fulfill a certain request, and in order to perform properly, the space needs to be equipped with the proper systems …
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Multiscale Gaussian graphical models and algorithms for large-scale inference
… have limited modeling power that may lead to blocky artifacts. Previous works on extending trees to pyramidal structures resorted to computationally expensive methods to get solutions due to the resulting model complexity. In this thesis, we propose a pyramidal graphical model with rich …
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Carbide-free bainitic steels for wear and rolling contact fatigue resistant applications
… were utilized as ways of reducing excess of blocky retained austenite. Microstructural alterations were observed with use of optical and electron microscopy methods, as well as quantified by X-ray diffraction, including a layer-by-layer method developed specially for this work. The research …
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