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 30 for “"inflection points"”.
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Investigation of Inflection Points as Brace Points in Multi-Span Purlin Roof Systems
… was conducted to evaluate the behavior of inflection points as brace points in multi-span purlin roof systems. Seven tests were conducted using "C" and "Z" purlins attached to standing seam and through fastened panels. These tests were subjected to uniform gravity loading by means of a …
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Development of a rapid test to determine moisture sensitivity of HMA (Superpave) mixtures
… APA results do not indicate any stripping inflection points. The HWTD results show stripping inflection points. The APA results show wet tests are severe at lower temperatures whereas dry tests show high rut depth at higher temperatures. The HWTD results show improvement in the performance …
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Shear flow instabilities in viscoelastic fluids
… inertial instabilities of inviscid flows with inflection points. We begin part I with a previously known short-wave instability of Upper Convected Maxwell and Oldroyd–B fluids at zero Reynolds number in Couette flow. We show that if the Weissenberg number is large, the instability persists with …
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Velocity distribution in steep rough channel
… of logarithmic law was examined and the inflection points in tranquil and rapid flow regime were studied. Also the velocity coefficients in tumbling regime were studied. The findings were confirmed through the analysis of data taken from project 405 of the Civil Engineering Department. A …
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Porosity studies of isoreticular mixed-ligand metal-organic frameworks
… vapour sorption at 298 K. Sorption isotherm inflection points indicate that structural changes occur, and empirical evidence point to weak bilayer···bilayer interactions in 1′ which allow the separation of the bilayers as well as the limiting effect on structural changes of the methoxy group …
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Critical breaking
… to these case studies are also introduced as inflection points and potential alternative expressions of critical breaking analysis. The goal of this thesis is to provide a way to engage with breakdown and error and more than simply the negation of the good or as a sensationalist talking point, …
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Flow through Rigid Vegetation Hydrodynamics
… by a velocity spike near the bed and an inflection point near the top of the dowel arrays. With two dowel layers, the velocity profile in the region behind a tall dowel exhibits multiple inflection points and the highest turbulence intensities are found there.
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Variable complexity modeling of postbuckled stiffeners for delamination initiation
… load-end shortening plots. The nodallines and/or inflection points of the out-of-plane deflection along the free edge in the postbuckled configuration are found to be delamination critical sites. Both interlaminar shear stress tangent to the free edge and tensile interlaminar normal stress are …
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Real Algebraic Geometry of the Sextic Curves
… to each class, such as the bitangents, inflection points, and tensor eigenvectors. We also study the real tensor rank of plane sextics, the construction of quartic surfaces with prescribed topology, and the avoidance locus, which is the locus of all real lines that do not meet a given …
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The Space-time Structure of an Axisymmetric Turbulent Boundary Layer Ingested by a Rotor
… layer. The mean flow along the tail developed inflection points in the outer regions and the associated velocity and turbulence stress profiles were self-similar with a recently proposed embedded shear layer scaling. As the mean flow decelerates downstream, the large-scale motions energize and …
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Creating supply chain visibility : a case study on extending Intel's Unit Level Traceability to customers
… can effectively prepare a response for when inflection points occur and motivate customer ULT adoption. The timing of the adoption is largely sensitive to when customers are ready to bring on this sort of change and understanding what factors will cause this need. Ultimately, this project …
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Simulation of Early Stand Development in Intensively Managed Loblolly Pine Plantations
… which was conditioned to correspond with inflection points of basal area growth curves from observed data. Early silvicultural treatment response functions were also developed. These equations modify growth for shearing and piling, discing, and bedding site preparation methods, …
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Faults and fractures in the Niobrara Formation of Wattenberg field, Colorado
… Faults were discovered by interpreting inflection points in cumulative dip plots and azimuth walkout plots derived from a borehole image log in a vertical well. On the image log fractures are consistently found in both the Niobrara chalk and marl benches. The individual benches are not …
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Fynbos connectivity as a function of dispersal distance and the implications for bird conservation in the greater Cape Town area
… relationship is not linear but sigmoidal with inflection points at 45% connectivity. This raises the question of a connectivity threshold in the Fynbos Biome. Characteristics of the landscape are assessed and it is shown that Fynbos vegetation in the greater Cape Town area is highly fragmented. …
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Analysis and characterization of ancillary service demand response strategies for variable air volume HVAC systems
… airflow reduction, and zone temperature rise. Inflection points on the curves that delineate performance effectiveness are found to result from maximum or minimum terminal unit damper positions. In the future, the development of mathematical functional forms of these characterization curves …
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The Effects of Curvature on Turbulent Boundary Layers Over a 3D Bump Geometry: An Experimental Study Using BeVERLI Hill
… reflects on the embedded shear layers with inflection points which can create conditions for linear instabilities to grow, thus enhancing coherent turbulent motions. Furthermore, the thesis discusses the challenges in separating the influence of curvature from pressure gradient effects in …
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Whistles of Sympatric Species of Bottlenose Dolphins (Tursiops truncatus) and Spotted Dolphins (Stenella frontalis) in the Bahamas: Acoustic Characteristics and Contextual Use
… in these populations were duration and number of inflection points, which may aid in individual differentiation or identification. Whistle acoustic parameters were also found to vary with behavioral context and group composition in spotted dolphins. Specifically, significantly more whistles …
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An Analysis of Trends of Generic Drugs and Biologic Prices in the U.S.
… website database. We segmented the data using inflection point detection and conducted piecewise linear regression to find differences in the trends for the segments defined by the inflection points. We used R Project for Statistical Computing version 3.6.1 for the analysis.</p> …
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A Wiener Chaos Based Approach to Stability Analysis of Stochastic Shear Flows
… we demonstrate that it is neither the number of inflection points in a defect, nor the input variance attributed to a defect, that influences the variance in stability characteristics for Poiseuille flow, but the shape/symmetry of the defect. Conversely, we show the symmetry of defects to be less …
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Deconstructing places : a data-driven ethnography of neighborhood change for one New York city block
… impact, where change can accelerate at so-called inflection points where technological progress in society is meeting the built environment and the people operating within. At these points, the speed of a neighborhood can increase rapidly causing displacement and gentrification and at other times, …
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