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 13 of 13 for “"DRACO"”.
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Improving Introductory Computer Science Education with DRaCO
… based on the Design Recipe and Code Outlining (DRaCO) processes. Our new pedagogy capitalizes on the algorithmic intuitions of novice students and provides a tool for students to externalize their intuitions using techniques they are already familiar with, rather than with the syntax of a …
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Investigating the Low-Mass Stellar Initial Mass Function in Draco
… in the Local Group dwarf spheroidal galaxy, Draco. Using archival HST/ACS and WFC3 optical imaging, we construct deep color-magnitude (CMD) diagrams in 3 different felds at 3 different galactocentric radii and measure the IMF by modeling the resolved lower main sequence. We model the optical …
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Validation of the DRACO Particle-in-Cell Code using Busek 200W Hall Thruster Experimental Data
… to the electric propulsion plume code DRACO as well as a validation and sensitivity analysis of the code using data from an AFRL experiment using a Busek 200 W Hall Thruster. DRACO is a PIC code that models particles kinematically while using finite differences schemes to solve the …
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Development of the DRACO ES-PIC code and Fully-Kinetic Simulation of Ion Beam Neutralization
This thesis describes development of the DRACO plasma simulation code. DRACO is an electro-static (ES) code which uses the particle-in-cell (PIC) formulation to track plasma particles through a computational domain, and operates within the Air Force COLISEUM framework. The particles are tracked on …
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Development of a Parallel Electrostatic PIC Code for Modeling Electric Propulsion
… list and Virginia Tech's System X, ranked 7th. DRACO, the Virginia Tech PIC module to Coliseum, was modified with parallel algorithms to create a full parallel PIC code. A parallel solver was added to DRACO. It uses a Gauss-Seidel method with SOR acceleration on a Red-Black checkerboard scheme. …
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Modeling Differential Charging of Composite Spacecraft Bodies Using the Coliseum Framework
… has been developing a module for COLISEUM called DRACO, a particle-in-cell based code capable of plume modeling for geometrically complex spacecraft. This work integrates a charging module into DRACO. Charge is collected via particle impingement on the spacecraft surface and converted to …
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Compact neutron sources for Nuclear Physics: from accelerator-based to laser-driven neutron beams
… of an LDNS has been carried out at the DRACO laser facility of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) in Dresden, Germany, producing neutron shots at 0,02 Hz in a high-power system in stable conditions. In addition to conventional scintillators and bubble detectors operated in …
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The Mouth of Hell in Medieval Art and Thought
… the tenth century and association with Leviathan/draco and the lion, however, led to a movement from earlier anthropomorphic representations to strongly zoomorphic types. These found their way into visionary literature, affecting the torments of the damned, particularly those torments which …
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An algebraic model of software evolution
… the Laws of Programming and the transformational Draco Paradigm. The result is an algebraic structure consisting of the states of the software product (system descriptions) ordered by a relation of relative correctness with transformations defined between the system descriptions. This structure is …
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Assessment of animal diversity in Pulau Tinggi, Mersing, Johor for conservation and indicator for potential wildlife tourism
… each wildlife species. For herpetofauna tourism, Draco melanopogon and Kaloula pulchra were selected as potential tourism products; for bat-based tourism is Pteropus hypomelanus; in camera trap, targeted species for wildlife tourism is Caloenas nicobarica and for entomotourism, lepidoptera order …
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Rethinking computer architecture and operating system abstractions for good & evil
… techniques. The thesis also develops the Draco OS and hardware mechanisms for low-overhead protection of the system call interface by caching validated system calls and arguments. In the second theme, this thesis proposes Elastic Cuckoo Page Tables, a radical rethink of virtual memory …
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How environments shape ornament morphological evolution: bringing perspective to a century of inconsistent sexual allometry analysis
… affects allometry patterns. Among Anolis and Draco lizards, light and display distances were found to prevent their ornamental dewlaps from evolving disproportionately large allometric patterns, despite being a known sexually selected structure. Not only do these allometries suggest dewlap …
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Spherically-symmetric inhomogeneities in general relativity and their effects in cosmology
… for the void observed in the direction of Draco in the WISE-2MASS galaxy survey, and a corresponding cosmic microwave background (CMB) temperature decrement in the Planck data in the same direction. We find that the present-day density and velocity profiles of the void are not well …