Thesis (M.S.)--West Virginia University, 2005 / Title from document title page. Document formatted into pages; contains xii, 139 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 94-95).

Thesis (Ph.D. in mechanical engineering)--Washington State University, August 2005. / Includes bibliographical references.

Thesis (M.S.)--Montana State University--Bozeman, 2006. / Typescript. Chairperson, Graduate Committee: Barry H. Pyle. Includes bibliographical references (leaves 68-72).

In principle a quantum system could be used to simulate another quantum system. The purpose of such a simulation would be to obtain information about problems which are difficult to simulate on a classical computer due to the exponential increase of the Hilbert space with the size of the system, and which cannot be readily measured or controlled in an experiment. A quantum simulator is, however, an open quantum system that will interact with the surrounding environment, which in this case are other particles in the system, and will be implemented using imperfect controls, making it subject to noise. It has been suggested that noise does not need to be controlled to the same extent as it must be for general quantum information processing. However, the effects of noise in quantum simulations are not well understood and how best to treat them in most cases is not known. In the present work we study an existing quantum algorithm for the simulation of the one-dimensional Fano-Anderson model. This algorithm was proposed for a liquid-state NMR device. We examine models of noise in the evolution using different initial states in the original model. We also add interacting spins to simulate realistic situation where an environment of spins is present. We find that states which are entangled with their environment, and sometimes correlated but not necessarily entangled have an evolution which is described by maps which are not completely positive. We discuss the conditions for this to occur and also the implications.

Syfte: Studiens syfte var att förbättra synen för närseendet för emmetropa presbyoper med tillpassade opaka infärgade pinhole linser (2 mm) och sen mäta hur dessa påverkar synskärpa, stereoseende och kontrastseende, samt jämföra detta med okorrigerad och korrigerade förhållanden för alla mätningar. Material och metoder: Mätningar för synskärpa på nära, terminal och avstånd samt stereoseende och kontrastseende utfördes tre gånger. Först utan korrektion sedan med korrektion och slutligen med opaka pinhole linsen från Nordiska Linser AB (dia 14,0 mm och baskurva 8,6 mm) i det odominanta ögat. Detta utfördes på 10 personer varav 3 exkluderades, på grund av de refraktiva kriterierna. Studiens kriterier var emmetropa presbyoper med åldersspann på 40-60 års ålder samt ej mindre pupill än 3 mm vid illumination på 85 cd/m2. Resultat: Resultatet av studien för avståndseende visade en signifikant skillnad mellan okorrigerad (-0,03 logMAR) och pinhole linsen (-0,12 logMAR) med ett p-värde på 0,05. Det fanns ingen skillnad mellan linsen och full korrektion (-0,17 logMAR). Studien visade ingen signifikant skillnad mellan okorrigerad och pinhole kontaktlinsen i de andra mätningarna (terminal p = 0,591, läsavstånd: p = 0,773, stereoseende p = 0,476, kontrastkänslighet p = 0,530). Slutsats: Pinhole kontaktlinsen visade en signifikant förbättring endast i binokulär avståndssyn jämfört med ingen korrektion. Pinhole kontaktlinser är lite bättre än okorrigerad på när- och mellanavstånd men inte lika effektiva som vid full korrigering på när- och mellanavstånd.

We experimentally investigate the phenomena of large jet rebound, a mode of fluid transfer following oblique jet impacts on hydrophobic substrates. We initially seek to describe the jet rebound regimes in tests conducted in the weightless environment of a drop tower. A parametric study reveals the dependence of the flow structure on the relevant dimensionless groups such as Reynolds number and Weber number defined on the velocity component perpendicular to the substrate. We show that significantly larger diameter jets behave similarly as much smaller jets demonstrated during previous terrestrial investigations is some parameter ranges while the flow is fundamentally different in others. Level-set numerical predictions are provided for comparisons where practicable. Simple models are developed predicting landing geometry and the onset of instability that are found to yield good agreement with experiments and simulations. Improving our understanding of such jet rebound opens avenues for unique transport capabilities.

Infinite dimensional systems such as flexible airplane wings and Vertical Axis Wind Turbine (VAWT) blades may require control to improve performance. Traditional control techniques use position and velocity information feedback, but velocity information for infinite dimensional systems is not easily attained. This research investigates the use of reduced-sensing control for these applications. Reduced-sensing control uses feedback of position measurements and an associated filter state to stabilize the system dynamics. A filter state is a nonphysical entity that appends an additional ordinary differential equation to the system dynamics. Asymptotic stability of a system using this control approach is confirmed through a sequence of existing mathematical tools. These tools include equilibrium point solutions, Lyapunov functions for stability and control, and Mukherjee and Chen's Asymptotic Stability Theorem. This thesis research investigates the stability of a beam representing an airplane wing or a VAWT blade controlled using feedback of position and filter state terms only. Both of these infinite dimensional systems exhibit asymptotic stability with the proposed reduced-sensing control design. Additionally, the analytical stability response of the VAWT is verified through numerical simulation.

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Thesis (M.S. in Bio. E.)--School of Mechanical Engineering, Georgia Institute of Technology, 2004. Directed by Hanjoong Jo. / Includes bibliographical references (leaves 46-58).

The purpose of this paper is to compose reduced proper motion diagram (RPMD) and to perform its analysis. The stars that has MKK system or those belonging to the group of subdwarf, white dwarf and metal-deficient. From possessed data catalog known binary stars were excluded. Color excess EB-V in this paper was calculated in the following two ways: •Using MKK system; •Using Shlegel method (including distance to the star). Color excess average that was calculated from EB-V results found using two above presented ways was used for 1-5 luminosity classes. calculated according to Shlegel method was used for subdwarf and metal-deficient stars. Taking into account that white dwarfs are near stars, EB-V was equated to 0. Following parameters were calculated in this paper: interstellar extinction AV, reduced proper motion HV, and absolute magnitude MV. Accuracy of used parameters was analysed. Having composed RPMD separately for each luminosity class, distribution areas of the stars were localysed by two intersecting lines. Obtained RPMD was compared to the Jones reduced proper motion diagram. Identified relation between MV and HV was approximated with line.