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 20 of 24 for “"Parsec"”.
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Transverse polarization structure of parsec-scale radio jets
The magnetic fields that thread extragalactic radio jets play an important role in the emission properties and evolution of these objects; knowledge of the structure and evolution of these magnetic fields is therefore important in forming a better understanding of jets by imposing constraints on …
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Parsec-scale polarization of the jet in quasar 4C 71.07
… be well aligned with the jets in quasars on kiloparsec-scales, but on parsec-scales, the picture is less clear with apparently large misalignments between field and jet seen in a number of sources. This raises the question: are jet magnetic fields becoming aligned on parsec-scales? This thesis …
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Tolerating asymmetric data races with minimal hardware support
… We evaluate Pacman for all the SPLASH2 and PARSEC applications. Our results show that Pacman is effective and has minimal overhead. ii
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A near-infrared view of luminous quasars: black hole masses, outflows and hot dust
… emission to probe ionised gas extended over kilo-parsec scales in luminous $z\gtrsim2$ quasars. Broad [OIII] velocity-widths and asymmetric structure indicate that strong outflows are prevalent in this population. We estimate the kinetic power of the outflows to be up to a few percent of the …
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Rayleigh—Taylor-Instability Evolution in Colliding-Plasma-Jet Experiments with Magnetic and Viscous Stabilization
… in inertial confinement fusion implosions to parsec-scale supernova remnants. The evolution of this interchange instability in a plasma is influenced by the presence of viscosity and magnetic fields, both of which have the potential to stabilize short-wavelength modes. Very few experimental …
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Investigating the Low-Mass Stellar Initial Mass Function in Draco
… libraries (Padova, BaSTI, Dartmouth, Victoria, PARSEC), and a binary star model. For a single-sloped power-law IMF model, we find that the IMF slope steepens by up to 0.7 dex for radii between 150 and 300pc, while the binary fraction remains approximately constant. The absolute values of the IMF …
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A new population of very high-energy gamma-ray sources detected with H.E.S.S. in the inner part of the Milky Way
… disc for the parent population of less than 100 parsec.
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An unbiased infrared H2 search for embedded flows from young stars in Orion A
… die Jets schnell bis auf eine Länge von einigen Parsec aus und werden dann langsam wieder kürzer. Sie sind zuerst sehr leuchtkräftig, die H2 Helligkeit nimmt aber im Lauf der protostellaren Entwicklung ab. Die Längen- und H2 Leuchtkraftentwicklung lässt sich im Wesentlichen durch eine zuerst sehr …
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Proximity coherence for chip-multiprocessors
… behaviour of parallel benchmark suites such as Parsec and SPLASH-2. This thesis presents work detailing the sharing patterns observed when running the full benchmarks on a simulated 32-core x86 machine. The results reveal considerable locality of shared data accesses between threads with …
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ATAC : A 1000-core cache coherent processor with on-chip optical network
… simulations with Graphite [20] using Splash2, Parsec, and synthetic benchmarks, we show that ATAC with ACKwise out-performs a chip with conventional interconnect and cache coherence protocols. On 1024-core evaluations, ACKwise protocol on ATAC outperforms the best conventional cache coherence …
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Modelling Of Protostellar Jets Using Intense Lasers
… the Hubble Space Telescope, astronomers observe parsec-scale plasma jets emerging from Young Stellar Objects and colliding with the interstellar medium, generating shock structures. A set of mathematically rigorous scaling transformations exists allowing dynamic scaled models of radiative, yet …
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The relation between atomic and molecular gas: the Magellanic Clouds and beyond
… atomic and molecular gas relation at sub-kiloparsec and kilo- parsec scales. I conclude that it is essential to incorporate diffuse cloud components into theoretical models of galaxy ISM evolution and molecular cloud formation because of their important role in the galactic ecosystem.
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Neutral Networks of Real-World Programs and their Application to Automated Software Evolution
… to reduce the energy consumption of the popular PARSEC benchmark applications by 20% as compared to the best available public domain compiler optimizations. The applications presented herein apply evolutionary computation techniques to existing software using common software engineering tools. By …
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Detectability of Self-Lensing Supermassive Black Hole Binaries in Quasars
… hole binaries (SMBHB) have been discovered at parsec (pc) and kiloparsec separations, there are currently no unambiguous detection of SMBHBs (Tremblay et al. 2016; Bansal et al. 2017)[1][2]. One promising new detection technique is through gravitational self-lensing events which may be possible …
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Understanding the Earliest Stages of High-mass Star Formation
… stages, and signatures of triggering within the parsec-scale clumps hosting OB stars. Our study of the W3 GMC comprises an analysis of the young stellar objects (YSO), the regions currently hosting on-going high-mass star formation, the environment, history, and compact source population. Spitzer …
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Automated performance characterization of applications using hardware monitoring events
… speedup of 1.73 from three applications in the PARSEC benchmark suite. Our system provides programmers with a guideline of what, where, and how to fix the detected performance problems in applications, which would have otherwise required considerable architectural knowledge.
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A Global Hydrodynamic Investigation into the Transport of Material in Protoplanetary Discs
… when placing our disc at a distance of 140 parsec, the circumplanetary discs of these embedded planets remain likely unobservable in ALMA Bands 6 and 7. This theoretical work, set against the backdrop of recent progress in protoplanet detection therefore offers valuable contributions to our …
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A hierarchical software development environment for performance oriented parallel programming
… and built such an interface and environment (Parsec -- the Parallel System for Efficient Computation) along with prototype mapping and loading tools as a follow-on to our original TIPS environment. The system utilizes the process-port-channel model of parallel program description and supports …
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