Дисертації з теми "Aerospace engineering, n.e.c"
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Bejarano, Roberto Villa. "An Investigation Into| I) Active Flow Control for Cold-Start Performance Enhancement of a Pump-Assisted, Capillary-Driven, Two-Phase Cooling Loop II) Surface Tension of n-Pentanol + Water, a Self-Rewetting Working Fluid, From 25 ?C to 85 ?C." Thesis, University of Nevada, Reno, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1565813.
Повний текст джерелаCold-start performance enhancement of a pump-assisted, capillary-driven, two-phase cooling loop was attained using proportional integral and fuzzy logic controls to manage the boiling condition inside the evaporator. The surface tension of aqueous solutions of n-Pentanol, a self-rewetting fluid, was also investigated for enhancing heat transfer performance of capillary driven (passive) thermal devices was also studied. A proportional-integral control algorithm was used to regulate the boiling condition (from pool boiling to thin-film boiling) and backpressure in the evaporator during cold-start and low heat input conditions. Active flow control improved the thermal resistance at low heat inputs by 50% compared to the baseline (constant flow rate) case, while realizing a total pumping power savings of 56%. Temperature overshoot at start-up was mitigated combining fuzzy-logic with a proportional-integral controller. A constant evaporator surface temperature of 60°C with a variation of ±8°C during start-up was attained with evaporator thermal resistances as low as 0.10 cm2–K/W. The surface tension of aqueous solutions of n-Pentanol, a self-rewetting working fluid, as a function of concentration and temperature were also investigated. Self-rewetting working fluids are promising in two-phase heat transfer applications because they have the ability to passively drive additional working fluid towards the heated surface; thereby increasing the dryout limitations of the thermal device. Very little data is available in literature regarding the surface tension of these fluids due to the complexity involved in fluid handling, heating, and experimentation. Careful experiments were performed to investigate the surface tension of n-Pentanol + water. The concentration and temperature range investigated were from 0.25%wt. to1.8%wt and 25°C to 85°C, respectively.
Phillips, David. "Analysis and Parameter Estimation of the Aerodynamic and Handling Qualities of the C-130A Modified With Wing Tip Tanks." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-11302004-185835/.
Повний текст джерелаHe, Jiliang. "Silyhydrazines : chemistry and pyrolytic conversion to Si-N-C ceramic materials." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29044.
Повний текст джерелаMcAvoy, Camille Z. "Palladium-catalyzed C-N cross-coupling reactions toward the synthesis of drug-like molecules." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73388.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. ).
The development of methodologies for C-N bond formation reactions is an important scientific challenge because of many academic and industrial applications. This work will focus particularly on palladium-catalyzed cross-couplings of amine-containing compounds with aryl halides. The scope of the BrettPhos precatalyst for the cross-coupling of ortho-substituted aryl iodides with amides is studied using substrates with a variety of functional groups. Due to potential metal-chelating issues with some of the substrates used in this study, a proposed ligand synthesis is discussed in which one of the methoxy groups of BrettPhos is replaced with a morpholine capable of occupying palladium's open coordination site during its catalytic cycle. A final C-N bond formation study focuses on the cross-coupling of aryl halides with amidine salts. For this cross-coupling, a methodology has been developed that can be applied to various electron-rich, electron-poor, and electron-neutral substrates. Furthermore, the products of this cross-coupling can be used for a subsequent electrocyclization through a reaction with aldehyde, demonstrating that a relatively simple two-pot methodology can be used to make relatively complex substrates with pharmaceutical applications. Both amides and amidines are common moieties in drug-like molecules because of the various biological activities of these functional groups. Potential medicinal applications of the developed cross-coupling of amidine salts with aryl halides methodology are described. Thus, methodologies for various palladium-catalyzed, C-N cross-couplings as well as a potential ligand synthesis to be used for palladium catalysis are herein discussed.
by Camille Z. McAvoy.
S.B.
Camardo, Andrew T. "C-JUN N-TERMINAL KINASE INHIBITORY NANOTHERAPEUTICS FOR REGENERATIVE ELASTIC MATRIX REPAIR IN ABDOMINAL AORTIC ANEURYSMS." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1499868307678719.
Повний текст джерелаShi, Zhangsheng. "Strain engineering of Co-N-C catalyst toward enhancing the HER and ORR electrocatalytic activities." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/207078/8/Zhangsheng_Shi_Thesis.pdf.
Повний текст джерелаDong, Jin Xiang 1961. "Effect of silicon on the kinetics of Nb(C,N) precipitation during the hot working of steels." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31048.
Повний текст джерелаIt was found that the rate of Nb(C,N) precipitation in hot deformed austenite increases with Si concentration. This phenomenon is attributed to the increases in both the Nb diffusivity and the activities of C and N that result from Si addition. Based on the Dutta and Sellars model, an expression for the effect of strain rate on the precipitation start time has been proposed. The present experimental results can then be extrapolated to mill conditions.
Saluru, Deepak Chaitanya. "Active Fault Tolerant Model Predictive Control of a Turbofan Engine using C-MAPSS40k." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338333795.
Повний текст джерелаRobertson, Cole D. "A Computational and Design Characterization for the Flowfield behind a C-130 during an Unmanned Aerial Vehicle Docking." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563533448658585.
Повний текст джерелаMöslinger, Anja. "Particle Trajectory Simulations for SCIENA-N : Conversion surface design for an ENA sensor head." Thesis, Luleå tekniska universitet, Rymdteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-83034.
Повний текст джерелаRose, Michael Benjamin. "Statistical Methods for Launch Vehicle Guidance, Navigation, and Control (GN&C) System Design and Analysis." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1278.
Повний текст джерелаJedrey, Richard M. "Development of a Discretized Model for the Restricted Three-Body Problem." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306856595.
Повний текст джерелаLatif, Shehzad A. "Effects of lightning of low-frequency navigation systems." Ohio : Ohio University, 2008. http://www.ohiolink.edu/etd/view.cgi?ohiou1204233932.
Повний текст джерелаRahil, Issam. "Elaboration et caractérisation de revêtements à base de nitrure de chrome, carbonitrure et carbure de titane élaborés par pulvérisation magnétron." Phd thesis, Ecole nationale supérieure d'arts et métiers - ENSAM, 2013. http://pastel.archives-ouvertes.fr/pastel-00967251.
Повний текст джерелаShohel, Muhammad Shah Newaz. "Panting Fatigue of Welded Steel Tee Details." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428328220.
Повний текст джерелаMaurer, Andreas. "Methods for Multisensory Detection of Light Phenomena on the Moon as a Payload Concept for a Nanosatellite Mission." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80785.
Повний текст джерелаSoboh, Yousef. "Anaerobic Co-Digestion of Algal Biomass and a Supplemental Carbon Source Material to Produce Methane." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4485.
Повний текст джерелаGruwell, Ammon Bradley. "High-Speed Programmable FPGA Configuration Memory Access Using JTAG." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6321.
Повний текст джерелаBaalla, Younes. "Development and Use of a Computer Program “Hyper-N” to Predict the Performance of Air Vehicles Traveling at Hypersonic Speeds." 2010. http://trace.tennessee.edu/utk_gradthes/684.
Повний текст джерелаBenaboud, R. "Etude thermodynamique et élaboration de dépôts métalliques (W-N-C, Ti-N-C) par PEALD (Plasma Enhanced Atomic Layer Deposition) pour la réalisation d'électrodes de capacités Métal/Isolant/Métal dans les circuits intégrés." Phd thesis, 2009. http://tel.archives-ouvertes.fr/tel-00441093.
Повний текст джерела(10587056), Rohan Gajanan Deshmukh. "System Analysis of a Numerical Predictor-Corrector Aerocapture Guidance Architecture." Thesis, 2021.
Знайти повний текст джерелаAerocapture has been envisioned as a potential orbit insertion technique for planetary destinations with an atmosphere. Despite not being flight proven technique, many studies found in the literature and recent mission proposals have employed aerocapture into their respective mission designs. The potential varying levels of trajectory dispersions experienced during atmospheric flight at each destination drives the need for robust and fuel-efficient guidance and control solutions. Existing guidance algorithms have relied on tracking precomputed reference trajectories, which are computed using significant simplifications to the flight mechanics, are not generally designed to be fuel-efficient, and require tedious performance gain tuning. When simulated with higher levels of uncertainty, the existing algorithms have been shown to produce large orbit insertion errors. Furthermore, existing flight control methodologies have been limited in scope to bank angle modulation. While some studies have introduced new methodologies, such as drag modulation and direct force control, they haven’t been tested at the same level of rigor as the existing methods. Advances in on-board computational power are allowing for modern guidance and control solutions, in the form of numerical predictor-corrector algorithms, to be realized. This dissertation presents an aerocapture guidance architecture based on a numerical predictor-corrector algorithm. Optimal control theory is utilized to formulate and numerically obtain fuel-minimizing flight control laws for lifting and ballistic vehicles. The unified control laws are integrated into a common guidance algorithm. The architecture is utilized to conduct Monte Carlo simulation studies of Discovery-class and SmallSat-class aerocapture missions at various planetary destinations.
Aswathi, S. "Effective Property Estimation of Carbon Composites using Micromechanical Modeling." Thesis, 2014. http://hdl.handle.net/2005/3196.
Повний текст джерелаMcKenna, Amanda Marie. "Characterizing groundwater-surface water interactions in Great Smoky Mountains National Park using hydrologic, geochemical & isotopic data." 2007. http://etd.utk.edu/2007/McKennaAmanda.pdf.
Повний текст джерела(7013471), NIRANJAN RAVI. "Integration of UAVS with Real Time Operating Systems and Establishing a Secure Data Transmission." Thesis, 2019.
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