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 “"Ppu"”.
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Development of a tissue-regenerative vascular graft: Structural and Mechanical Aspects
… ingrowth permissible porous polyurethane (PPU) foam and knitted reinforcement wire mesh, with the aim of providing vascular prostheses that mimic arterial mechanics. A 3D geometry of a knitted eight-loop wire mesh was imported into Abaqus CAE® 6.8-2 and assembled with a PPU tube …
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Defining the Role of Secondary DNA Structures and Transcription Factors on the Transcriptional Control of the HIF-1alpha and VEGF Promoters
… promoters contain a polypurine/polypyrimidine (pPu/pPy) tract, which are known to play critical roles in their transcriptional regulation, and are structurally dynamic where they can undergo a conformational transition between B-DNA, single stranded DNA and atypical secondary DNA structures such …
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Synoptic Comparison of Salt Marsh Spatial Structure Using Hyperspectral Imagery at NOAA National Estuarine Research Reserves.
… growing season patterns.|Patches per unit area (PPU) was an effective landscape metric for measuring patchiness of vegetation index classes for the entire landscape. The Texas, Georgia, and South Carolina sites displayed the highest PPU values, while sites in Mississippi and West Florida had the …
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Design and manufacturing of an ion electrospray propulsion system package and passively-fed propellant supply
… a fully-integrated power processing unit (PPU), propellant supply, and electrostatic ion accelerator designed for use in CubeSats. To meet the objectives of the iEPS project, development was necessary for all three components. The work described here focused on a redesign of the thruster …
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Methodologies and tools for computation offloading on heterogeneous multicores
… systems with a single Power Processing Unit(PPU) and 8 Synergistic Processor Units (SPUs). We address the issue of porting an existing sequential C/C++ codebase on to the Cell BE through compiler driven program analysis and profiling. Until parallel programming models evolve, the "interim" …
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Characterization on a magnetically levitated testbed for electrospray propulsion systems
… A fully stand-alone Power Processing Unit (PPU) capable of generating and delivering the high voltage signals needed to drive the thrusters is explained in detail. Test results of charging behavior and lifetime characterization of the emitted current are presented as a preliminary …
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Geschäftsmodell-Innovation als strategischer Erfolgsfaktor für die Edelstahlindustrie – Eine qualitative, empirische Studie am Beispiel Südostasien
… Monitoring of Tools & Dies, Pay-Per-Use (PPU) and Sustainability, have been identified, including the willingness of customers to pay for such new business models. The position of special-steel suppliers in the value-chain and possibilities for changes in the current position in the …
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Electrospray power processing unit for a monopropellant-electrospray multimode thruster
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Ionic liquid ion source emitter arrays fabricated on bulk porous substrates for spacecraft propulsion
… CubeSat, this type of thruster system, including PPU, would occupy roughly 10 % of the spacecraft volume and mass while enabling de-orbiting from an 800 km altitude in roughly 100 days, compared with many years when left to decay naturally.
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Origins and Use of Presidential Polling in Mexico, Presidential Approval in Mexico, Government Spending and Public Opinion in Mexico
… and use of the presidential polling unit (PPU). The second paper focuses on presidential approval in Mexico, and the third analyzes, yet another understudied topic, the relationship between government spending (used as proxy for policy) and public opinion (collected by the PPU). The first …