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 43 for “"free-floating"”.
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Development of an Emulated Free-Floating Environment for On-Earth Testing of Space Robots
<p>The ability to perform experiments on space robotic systems within a laboratory setting is crucial to development and testing of satellites and space robots prior to launch. One of the most widely used techniques which recreate the on-orbit motion of space robots and targets is …
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Theoretical and Experimental Investigation of Free-Floating Space Manipulator Motion Control Using Reinforcement Learning
… the critical motion planning problem for a 6DOF free-floating space manipulator using model-free Reinforcement Learning. This problem is caused by dynamic coupling between the spacecraft and robotic manipulator, which significantly affects control and precision in the space environment. This …
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An experimental evaluation of a free-floating superconducting solenoid as a low-level accelerometer
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1979.
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Oscillating Energy Harvester for UUV Applications
… potential energy profile configurations: free-floating, linear monostable, nonlinear monostable, and bistable. Active control was desired and two strategies were explored but deemed to be too costly to implement. The performance of each configuration was evaluated and it was found that the …
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Practical military applications of timetabling, path planning, and time-varying networks for maximizing mission success and minimizing risk
… models. The last paper, "Navigating Free-Floating Minefields via Time-Evolving Voronoi Graphs," is ready for submission pending journal-specific formatting. We use environmental data to generate Voronoi graphs representing static "snapshots" of a free-floating minefield over time. …
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Dream Machine
… art modeling, respectively—offer themselves up freely as subjects of voyeurism and surveillance. Other stories, such as "Network Support" and "Dream Machine" involve characters who abandon their physical forms to disappear into the internet, existing as free-floating data and radiant …
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Particulate fluxes in the subtropical convergence region and other marine environments of New Zealand
… traps deployed at set water depths on free-floating sediment trap arrays was the preferred design. Basal high density brines with formalin as a poison/preservative were employed for deployments scheduled to last 2-3 days in the winter and spring of 1993. Pilot studies in autumn 1992 and …
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Bridging Simple Models and Observations of the Flexure Zone around Antarctica
… region between the grounded ice sheet and the free floating ice shelves, where the ice flexes due to the rise and fall of ocean tides. Surface elevation data from ICESat-2 were analyzed at several sites on the Ross Ice Shelf, and flexure bounds were identified using a derivative-based detection …
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Effect of glycosidases and proteases on biofilms formed on black buna-N rubber
… used. No survivors remained after planktonic (free floating) cells of both P. fluorescens and L. monocytogenes were incubated with Purafect®. Reduction in overall numbers of P. fluorescens and L. monocytogenes attached in mixed culture by Purafect® appeared to involve a combination of release …
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Comparative studies on the currency board regime and its impact on Hong Kong’s economy.
… order to compare the historical performance of free-floating and currency board regimes for Hong Kong. I apply some advanced econometrics tools to identify my structural VAR models and offer appropriate analysis. My first empirical model suggests that output returns to a steady state much faster …
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The effect of inert biomass support media on activated sludge treatment of a high-strength industrial wastewater
… media were tested, NOR-PAC and Linpor used as free-floating supports, and BIONET used as a fixed-bed support. The effect of the media on substrate and oxygen utilization, and solid-liquid separation was investigated. Substantial attached growth did not occur on the NORPAC and BIONET media. The …
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Exoproteomics of the Pseudomonas aeruginosa biofilm matrix reveals the role of a novel secretion system
… biofilms, which conform more closely to the free-floating aggregates thought to occupy chronic infection sites. Moreover, these aggregates are encased in a large volume of exopolymeric matrix material, which presents an opportunity to study the matrix in more detail. Herein I describe a …
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In vitro pharmacological inhibition of myofibroblast differentiation and force generation in a collagen-GAG matrix
… phenotype. NR6WT fibroblasts were seeded into free-floating cylindrical CG matrices (8 mm in diameter, n=6) and treated with serum-containing media supplemented with TGF-[beta]1 (3 ng/ml) or both TGF-[beta]1 (3 ng/ml) and Y--27632 (10 [mu]M) for 12 days.
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Dynamics and evolution of dense stellar systems
… arguments. Light objects, which could represent free-floating planets or brown dwarfs, are predominantly lost from the cluster, as expected from simple analytical arguments, but may remain in the halo in larger numbers than expected. Using a recent null detection of planetary-mass microlensing …
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Development and experimental validation of self-centering buckling-restrained braces with shape memory alloy
… of the brace using a set of concentric tubes and free-floating anchorage plates that cause the SMA rods to elongate when the brace is both in tension and compression. Using a five-story building as context, half-scale SC-BRBs are designed and fabricated for experimental validation. To characterize …
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Cod removal, nitrification and denitrification kinetics and mathematical modeling of an integrated fixed film activated sludge (IFAS) system
… full scale studies with two types of media: (i) free floating media and (ii) media fixed in frames. Amongst biofilm support media in the first category, sponge cuboids (Captor) were selected. For the second category, rope type Ringlace media was selected. Following preliminary screening for …
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The determinants of the exchange rate volatility: A case study for South Africa
… with this global trend, South Africa adopted a free-floating exchange rate system in the mid-1990s and implemented an explicit inflation-targeting framework in the early 2000s. This policy transition, which emphasized the internal value of the rand, inadvertently led to increased exchange rate …
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THE EFFECT OF BIOFILM CARRIER LENGTH ON NITRIFICATION IN MOVING BED BIOFILM REACTORS: AN EXAMINATION OF MIXING INTENSITY, SHOCK LOADINGS, AND PH CHANGES
Biofilms grown on free-floating attachment surfaces, as in integrated fixed film activated sludg (IFAS) and moving bed bioreactors (MBBRs) are commonly used in wastewater treatment, but little is known about how media geometry affects the biofilms and process performance. The objective of this …
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Modeling fluid interactions with the rigid mush in alloy solidification
… the analogous interface is the transition of free-floating solid particles to a rigid dendritic network. Various models for grain attachment are investigated, and found to produce significant artifacts caused by the discrete nature of their implementation on the numerical grid. To reduce the …
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Development and evaluation of novel antimicrobial solutions against biofilms and planktonic microbial growth
… and ethanol, were used against planktonic (free-floating) microorganisms and biofilms (aggregated microorganisms). The Planktonic assay implemented use of a Millipore Filtration system. The Biofilm assays incorporated the MBEC plate, which included use of a 96-well plate with a specially …
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