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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 243 for “"Lorentz"”.
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Aspects of holography in Lorentz-violating gravity
… hence, on the equivalence principle and local Lorentz invariance.</p><p>The goal of this dissertation is to re-evaluate this generally accepted wisdom. To that end, we consider a modified gravity theory called Einstein-aether theory. This theory violates local Lorentz invariance and therefore …
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Effects of Lorentz forces on flame holding.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1965. Sc.D.
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Kategorielle Langlands-Korrespondenz für die verallgemeinerten Lorentz-Gruppen
… den Fall bewiesen, dass G eine verallgemeinerte Lorentz-Gruppe SO(1, n) ist.
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Lorentz actuators for turbulence control and underwater acoustic communications
Lorentz actuator dynamics in a fluid are governed by the fundamental principles of electromagnetism and hydrodynamics and have several potential applications in the marine field. Two areas of interest where improvements would lead to significant contributions are the turbulence control and …
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A Lorentz-force actuated needle-free intraocular injection device
… patient anxiety and numerous complications. Lorentz-force actuated needle-free jet injection has been shown to successfully deliver fluid to various layers of skin, and, by its nature, may reduce intravitreal injection anxiety and complications. The challenges of adapting current …
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Lorentz-force actuated needle-free injection for intratympanic pharmaceutical delivery
… the inner ear. The real-time controlled linear Lorentz-force actuated jet injector developed in the MIT BioInstrumentation lab was found to be a feasible technology for possible improvement over current intratympanic drug delivery methods. Jet injection holes using a nozzle with a 50 [mu]m …
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Experimental implementation of Lorentz force actuators for hydrodynamic drag reduction
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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A Lorentz-force actuated controllable needle-free drug delivery system
… and tested, using a controllable linear Lorentz-force actuator. This actuator allows rapid control of the injection pressure during injections. Using this device, precise control over delivery parameters can be achieved. In addition, several portable power systems for this injector were …
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Observation and characterisation of magnetisation ripple using Lorentz transmission electron microscopy
Lorentz transmission electron microscopy (LTEM) has proved itself to be an invaluable technique when investigating in-situ micromagnetic behaviour of magnetic thin films. The nano-scale visualisation of the magnetic structure allows for not only the mapping of hysteresis behaviour, but quantitative …
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Closed-loop control of vortex shedding by means of Lorentz force
… as seawater, this has the effect of creating a Lorentz force tangential to the surface of the cylinder and oriented in the flow direction. A novel analytical expression of the Lorentz force is derived by integrating the Maxwell equations and using series expansions. This expression is then used …
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Θεωρία προσέγγισης με νόρμες του Lorentz πάνω σε ομάδες του Lie
… and large T, hence the need to introduce the new Lorentz spaces which are development in this thesis. Several interpolation and convolution theorems are proved and the target is the last convolution theorem which contains the known Hardy-Littlewood-Varopoulos theorem for the potential operator …
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Joulean heating and Lorentz force effects on gaseous detonation flow fields.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1966. Sc.D.
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Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing
… as smart phones and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional coupler (PCDC) for magnetic field sensing perpendicular (out-of-plane) to the chip surface. Built on the Silicon-On-Insulator platform, a custom …
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Study of Lorentz Effect Imaging and Neuronal Current MRI Using Electromagnetohydrodynamic Models
… over functional MRI. One potential ncMRI method, Lorentz effect imaging (LEI), has shown promise but needs a better theoretical understanding to improve its use.</p><p>We develop three computational models to simulate the LEI experiments of an electrolyte filled phantom subject to a current dipole …
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An optimized Linear Lorentz-force Actuator for biorobotics and needle-free injection
Voice coils are a configuration of Linear Lorentz-force Actuator (LLA) that offer efficient transduction of electrical energy into linear motion. The simple geometry of a typical voice coil motor makes the configuration easily tunable for custom applications. Recent advances in high-energy magnets …
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Modular Lorentz force actuators for efficient biomimetic propulsion of Autonomous Underwater Vehicles
… developed a highly scalable design for modular Lorentz force actuators for use in segmented flexible-hull undersea vehicles such as the RoboTuna being developed at Franklin W, Olin College of Engineering. The actuators were designed to directly drive tail foil sections, or vertebrae, in an …
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Needle-free interstitial fluid acquisition using a Lorentz-force actuated jet injector
… technique of extracting ISF samples using a Lorentz-force actuated jet injector. The jet injector is used to first inject a small volume of physiological saline to breach the skin, and the actuator is subsequently back-driven to create a vacuum in the ampoule and collect a sample that …
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Lorentz force actuator and carbon fiber co-winding design, construction and characterization
… carbon fiber and copper coil for use in linear Lorentz force actuators. A conventionally-wound, plastic-bobbin actuator coil and the new, co-wound coil were then tested to compare their electrical, thermal, and mechanical performance. In a needle-free injection application, the cowound coil …
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The modeling and characterization of a Lorentz-force actuator for needle-free injection
… a needle-free injector that is driven by a Lorentz-force actuator. The current model was able to generate pressures of up to 20 MPa in order to drive a jet of water based solution. In order to improve the needle-free injector, a new Lorentz-force actuator was designed and modeled using …
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