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 19 of 19 for “"vertical alignment"”.
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Optimal train control on various track alignments considering speed and schedule adherence constraints
… optimize train motion regimes for various track alignments, which minimizes total energy consumption subject to allowable travel time, maximum operating speed, and maximum acceleration/deceleration rates. The research problem is structured into four cases which consist of the combinations of …
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Computer analysis, learning and creation of physical arrangements of information
… physical relations, such as horizontal and vertical alignment, in determining which pieces of information are most likely related. The computer program described in this thesis demonstrates that once a computer can deduce physical relations between pieces of information, it can learn to …
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The static and fatigue behavior of low profile precast concrete sleepers
… Profile precast concrete sleepers have the same vertical dimension as traditional wooden sleepers and thus offer a promising alternative to replace wooden sleepers on tracks where maintaining vertical alignment is necessary. The structural response of Low Profile precast concrete sleepers was …
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Horizontal vorticity redistribution and vortex alignment in developing and mature tropical cyclones
… structural changes. The problem of vortex alignment (and the attendant three-dimensional redistribution of vorticity) is then re-examined in an effort to further understand the underlying dynamics of TC-like vortices tilted by vertical shear. The study is motivated in part by the analysis …
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Wide Viewing Angle Liquid Crystal Displays
… is proposed. The designed multi-domain vertical-alignment liquid crystal display predicts superb contrast ratio over wide viewing angles. Next, to increase the bright state transmittance while maintain the high contrast. Finally, to reduce the cost and improve the applicability of the …
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Wide band-gap nanowires for light emitting diodes
… with regard to the nanowire length uniformity, vertical alignment relative to the growth substrate and the nanowire areal density. In this work we directly compare feasible designs for GaN-InGaN nanowire-based LEDs using a combination of photonic simulation and modeling. We compared the directed …
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Using data to guide curriculum development : how curriculum developers use formative and summative assessment data to inform the written curriculum
… of the written curriculum in terms of guiding vertical alignment, determining the scope and sequence of the curricular content, adding specificity to the curriculum documents, identifying and correcting curriculum gaps, guiding development of formative assessment, and adapting to state and …
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Dismantling Lost Cause fables : a content analysis examining narrative and visual representations of slavery in U.S. history textbooks.
… and state-adopted texts to assess horizontal and vertical alignment across U.S. history curricula. Critical race theory informed the data collection and analysis procedures focusing on the centrality and social construction of race particularly relating to racialized enslavement in British North …
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Carbon nanotube bearings in theory and practice
… CNT bearing demonstrators by establishing a vertical bearing orientation (enabling superior rotor balance and speed, and flexibility of placement for drive mechanisms) and a more manufacturable process (employing CNTs grown in place by chemical vapor deposition, and evaluating trade-offs in …
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Spatial pattern of African Easterly Waves and their Precipitation in Northern Africa
… level of maximum vorticity (850 hPa, 700 hPa or vertically collocated) and their location with respect to 15°N (northern and southern). The spatial distribution of these waves shows that the 700 hPa AEWs initiate farther east at about 51ºE and extend farther to the north to about 45ºN. The 850 …
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Flexible and substrate-free optoelectronic devices based on III-V semiconductor nanowires
… materials systems. Embedding high performance vertically aligned III-V nanowires in a flexible matrix enables applications where there is a need for substrate-free, flexible devices. The work in this thesis looks to address this by (1) developing a repeatable method of producing …
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Coaxial recess integration of InGaAs edge emitting laser diodes with waveguides on silicon substrates : a complete solution to laser integration on ICs
… optimized to provide highly reproducible vertical alignment to maximize the coupling of the laser output beam to the dielectric waveguide. Lasers are bonded into the recesses with this solder-bonding layer during a pressure assisted temperature cycle at 220°C. The low temperature nature of …
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Modeling Truck Motion along Grade Sections
… These procedures only consider the tangent vertical profile grades in the design of climbing lanes and do not capture the impact of vertical curvature on truck performance. The dissertation describes the TruckSIM framework for modeling vehicle motion along roadway sections by considering …
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Effects of alignment on CO2 emissions from the construction and use phases of highway infrastructure
… This thesis considers the effect of highway alignment, which is a decision taken early in a project's life cycle. The gradient of a highway can have a significant impact on the fuel consumption (and hence C02 emissions) of the vehicles operating on it. To design the alignment around an …
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The Future of Parkways in the Landscape
… the Depression era to today in terms of views, alignment, vegetation, natural and cultural features, and parkway details. How is parkway design and construction different from that of typical roadways; and how does this information effect the future design and construction of parkways? In …
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Multi-scale interactions leading to tropical cyclogenesis in sheared environments
… tropical cyclogenesis problem, namely, vertical wind shear (VWS), environmental humidity, and convective organization. These factors were explored using multiple data sources including observations such as dual-Doppler radar, dropsonde soundings, and satellite data for mesoscale case …
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Hybrid Devices : Morphology Control by Self-Assembly
… DMF vapor leading to microphase separation and a vertical alignment of the microdomains. Altogether, these studies pave the way for a profound basis for the development of morphology controlled hybrid devices. In the final part of this thesis the concept of amphiphilic semiconductor polymers or …
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Employment equity transformation within various levels of management in selected South African mines
… and managed. There was further strategic (vertical) alignment between HR practices and policies and the business strategy, as well as horizontal alignment between the HR functions. Although non-success cases had implemented some of the HR policies and practices stated above, the findings …
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Microscale actuators from carbon nanotube and hydrogel composites
… to fatigue over millions of strain cycles. Vertically-aligned forests of CNTs (VACNTs) can be grown by chemical vapour deposition, and these forests can be grown in predefined shapes by depositing the growth catalyst in the desired pattern using lithography. VACNTs act as pseudo-blackbodies, …