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 “"RLV"”.
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The development of a simple process for producing medicinal diagnostic 18F agents for molecular imaging using positron-emission-tomography
… developed for use in the resin-linker-vector (RLV) approach for the synthesis of [18F]-fluoride radiotracers for use as imaging agents in positron-emission-tomography (PET). The RLV strategy immobilises a precursor to the desired radiotracer on a solid support which is cleaved on exposure to …
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Optimal Engine Selection and Trajectory Optimization using Genetic Algorithms for Conceptual Design Optimization of Resuable Launch Vehicles
… engine selection for Reusable Launch Vehicles (RLVs) is a key factor in the design of low cost reusable launch systems for routine access to space. RLVs typically use combinations of different types of engines used in sequence over the duration of the flight. Also, in order to properly choose …
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Supply, demand, and entrepreneurial ventures in the space launch industry
… amount of financing required for commercial RLV development coupled with significant market risk, the employment of a myriad of high-risk technologies, the lack of Federal assistance beyond early stage RLV technology development, and numerous other barriers to entry have greatly undermined …
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Air traffic management and conflict analysis for reusable launch vehicles
… access to space. Reusable Launch Vehicles (RLVs) are expected to take over a significant portion of the launch markets. Increased utilization of Spaceports will increase the frequency of interruptions to normal airspace operations and new methods of Aircraft-RLV separation need to be …
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Escherichia coli and Rhizobium leguminosarum response mechanisms to sub-lethal 2,4-dichlorophenoxyacetic acid
… on Rhizobium leguminosarum bv. viciae 3841 (Rlv) and Escherichia coli BL21, I used a novel combination of methods involving advanced microscopy and metabolomics. Rlv showed an oxidative stress response, but showed adaptive capabilities with changes to specific metabolic pathways and …
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Onboard trajectory generation for the unpowered landing of autonomous Reusable Launch Vehicles
… trajectories used. in Reusable Launch Vehicle (RLV) guidance since the early days of the Shuttle era. This shift, enabled by a new breed of algorithms harnessing modern computer power, offers improvements in performance, robustness, operational cost, and safety. This thesis develops a set of …
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Finite time suboptimal control design of nonlinear systems with θ-D technique and implementation to aerospace applications
… applications, including Reusable Launch Vehicle (RLV) landing problem, multiple satellites docking problem, and satellite maneuvering considering J<sub>2</sub> perturbation problem. In this research, contrary to the finite-time state dependent Riccati equation (FSDRE) technique , the proposed …
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A predictor-corrector guidance algorithm design for a low L/D autonomous re-entry vehicle
The Precision Landing Reusable Launch Vehicle (PL-RLV) is a low L/D, 2-stage craft with a mission plan that calls for low cost, speedy retrieval, and quick turn-around-times for successive flights. A guidance scheme that best adheres to these goals and captures the vehicle's capability is desired. …
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Reactivation of persistant tuberculosis
… model was applied and mice were treated with RlV|P-INH for 4 weeks to reduce the CFU to undetectable levels. While wild-type control mice spontaneously reactivated but controlled the infection upon cessation of chemotherapy, TNF deficient mice developed fatal reactivation of infection. The …
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Tight Discrete Formulations to Enhance Solvability with Applications to Production, Telecommunications, and Air Transportation Problems
… due to the advent of Reusable Launch Vehicle (RLV) technology. Currently, each shuttle launch cordons off a large region of Special Use Airspace (SUA) in which no commercial aircraft are permitted to enter for the specified duration. Of concern to airspace planners is the expense of routinely …