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 10 of 10 for “"levitator"”.
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A low-power-extended-linear-range magnetic levitator
… to extend the linear range of a magnetic levitator. Analog Devices AD633 multipliers are used to implement nonlinear terms which compensate for the electromagnet and sensor nonlinearities, which were measured experimentally. Implementing the nonlinear compensation allows the system to be …
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The road to multi-dimensional magnetic levitation : realizing two-dimensional control in classical feedback
A stable multi-dimensional magnetic levitator was characterized and implemented. This thesis contains a full analysis of the feedback specifications, a short summary of the circuits used in the design of the setup, and results from the physical device. Two and three dimensional magnetic levitation …
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Effect of geometric parameters on drop-positioning forces for a levitated drop reactor
… and reflector of a single-axis acoustic drop levitator, in order to better understand the dependence of levitation capability on geometric parameters. Modifications to the drop levitator radiating plate are investigated using the BEM. Gor’kov’s theory is used to calculate the acoustic forces …
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Physical and chemical characterization of single atmospheric aerosols: Laboratory studies of interactions of acidic trace gases with sea -salt aerosols, and, Development efforts for an aerosol charging system using a corona discharge
… instrument was a spherical void electrodynamic levitator that was used to suspend and optically characterize the physical and chemical properties of individual aerosols. Physical measurements of the aerosols were conducted with the aid of a Mie scattering system while chemical characterization …
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Control and design of a single degree-of-freedom magnetic levitation demonstration
… setups at MIT yields a new operating, stable levitator with improved robustness.
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Hybrid optical and acoustic trapping
… optical trap, has been combined with an acoustic levitator, which moves all particles away from the edges of the microfluidic channel reducing on sticking and other negative effects.<br/><br/>A novel optically transparent ultrasonic device has been developed for easier integration into optical …
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Chemical selection rules of single-phase high-entropy oxides
… in a quadrupole lamp furnace and conical nozzle levitator at synchrotron X-ray facilities. The thermal expansion behaviors of single-phase, high-entropy, lanthanide oxides were measured. Cation size mismatch and preferred valence configurations have significant influences on the formation of …
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Phase equilibria, thermal expansion and symmetry relations within the HfO2-Ta2O5-TiO2-temperature system
… (QLF) (200 – 2000 ± 4 ˚C) and a conical nozzle levitator system equipped with a CO2 laser (CNL) (700 – 3000 ± 100 ˚C) in conjunction with synchrotron X-ray powder diffraction. These devices allow for (i) phase identification as a function of temperature, (ii) crystal structure determination …
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Experimental technique for studying high-temperature phase equilibria in reactive molten metal based systems
… the most suitable operating parameters of the levitator by direct observations of the levitated samples, as opposed to more traditional pressure mapping of the acoustic field. The size range of samples that could be reliably heated and quenched in this setup was determined to be on the order of …
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Acoustically-levitated drop reactor (ldr) employable for kinetics measurements of biochemical networks
Accurate measurement of enzyme kinetics is an essential part of understanding the mechanisms of biochemical reactions. The typical means of studying such systems use stirred cuvettes, stopped-flow apparatus, microfluidic systems, or other small sample containers. These reaction-kinetics …