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 28 for “"FIREBALL"”.
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Morning light : the secret history of the Tagish Lake Fireball
… Territory in northern Canada. The size of the fireball and the contrail that it left behind caught the attention of meteoriticists, who suspected it was a carbonaceous chondrite. Amongst the public, however, reactions to the event were varied, and conspiracy theorists emerged, claiming that the …
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Observation and Modelling of Meter-Class Earth impacting Asteroids
… to meter-sized and larger meteoroids observed as fireballs. Fireball event characteristics directly point to the properties and structure of the parent body from which the meteoroid originated. In-atmosphere fireball data paired with in-space observations bring much context to both observations. …
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Spectral characterization of actinide signatures for nuclear remote sensing applications
… Distinguishing between a nuclear and non-nuclear fireball and determining the nuclear material and amount present in the fireball are necessary to inform response accordingly. Spectroscopy provides potential avenues for remote detection of nuclear material, and methods can be developed to monitor …
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Influence of hormonal chemicals and genotypes on fruit growth of Lycopersicon esculentum Mill
… nutrient solution to tomato seedlings of 'Fireball' and 'Red Cherry' significantly delayed anthesis of 'Fireball', but not 'Red Cherry'. Ovary diameter at anthesis, final fruit diameter, and fruit weight of both cultivars were unaffected. Irrespective of treatments, a significant positive …
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Multispectral optical depth measurements in post-detonation high explosive fireballs
… depth measurements were made in post-detonation fireballs from five different high explosives. PETN, HMX-based PBXN-5, RDX, an 80% RDX/20% aluminum mixture, and PETN-based Primasheet 1000 explosives were detonated in a 2.18L explosive test chamber. Charges were 125mg or 250mg explosive output …
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A "fireball of emotion": a qualitative case study exploring the experiences of crisis and crisis intervention for people diagnosed with "borderline personality disorder", their family and friends, and professionals who work with them.
The aim of this study was to explore the perspectives of people diagnosed with "borderline personality disorder" (BPD) and relevant stakeholders regarding experiences of crisis and subsequent crisis intervention. Crisis and the use of crisis intervention is described as frequent for people …
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Using optical techniques to measure aluminum burning in post-detonation explosive fireballs
… what the aluminum is reacting in the explosive fireball. Efforts in aluminum combustion have focused on aluminum monoxide (AlO) emission because it is easy to measure, and it is a combustion marker in some cases; however, the first part of the current study has indicated that explosive fireballs …
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Production inclusive de particules dans les collisions relativistes de noyaux lourds
… dominant) entraînent la formation d’une "fireball" M, laquelle se désintègre ensuite en une particule m que l’on détecte et une "fireball" résiduelle M’. La désintégration est de nature statistique et contrôlée par le rapport des densités d’états du système final M’ + m et initial M. Tous …
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Explosive energy yield analysis of World Trade Center crash
… and the corresponding energy yielded by the fireball was estimated by studying videotapes of the crashes. The calculated volume of fuel vapor, which is consumed to form the fireball, is a fraction of the estimated total fuel aboard the plane upon impact. Due to thermal expansion, the fuel …
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Mechanisms of the Wurtzite to Rock Salt Phase Transitions in Galium Nitride
… mechanisms for this transition. We then used FIREBALL to do density functional theory calculations and found enthalpy barrier heights for the transition pathway. We used this to determine the mechanisms that are the most favorable for GaN. The most favorable mechanisms for GaN are those that …
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A Search for Muon Neutrinos from Gamma-Ray Bursts wih the IceCube 22-String Detector
… out via the GRB Coordinate Network (GCN). The fireball model describing the physics of GRBs predicts the emission of muon neutrinos from these bursts. IceCube is a cubic kilometer neutrino detector buried in the deep antarctic ice at the South Pole that can be used to find these prediceted but …
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The Elastic Properties of Carbonaceous Chondrites
… meteorite collections, but are evidenced in the fireball population.
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Experimental investigation of optical and electrical properties of various explosive fireballs
… quantitative experimental data of explosive fireballs at early time scales is crucial for validating 1-D numerical models of spherical charges. While numerical modeling remains a powerful tool for elucidating explosive phenomena, such predictions still require some degree of physical …
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Developmental changes in nitrogen and protein of tall and dwarf tomato seedlings Lycopersicon esculentum Mill
… Nesslerization technique. The tall tomato 'Fireball' differs from the dwarf 'Md. 412-4' in several ways: (1) the tall has more total nitrogen and protein; (2) it exhibits a significant increase in protein during the initial 48-hours of seeds imbibition; (3) it has a higher amount of protein …
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IMPACT OF THE PRE-EQUILIBRIUM STAGE OF ULTRA-RELATIVISTIC HEAVY ION COLLISIONS: ISOTROPIZATION, PHOTON PRODUCTION AND ELLIPTIC FLOWS
… equilibrated quark-gluon plasma during the whole fireball lifetime. This early contribution enhances the spectrum mainly in a transverse momentum range ($p_T>2-3 GeV$) where thermal emission becomes less important. The pre-equilibrium phase has an impact also on the photon elliptic flow, since …
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The Formation of Distal Impact Ejecta
… that forms a massive expanding vapor plume or fireball. In this model molten droplets or spherules condense from the vapor. We model the expanding vapor plume using a one dimensional Lagrangian hydrocode. The condensation of droplets is treated by directly coupling the equations for homogeneous …
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The very high energy gamma ray burst GRB190114C as observed by MeerKAT
… to put an upper limit on the radial size of the fireball, and compare this to other GRBs. Beyond the GRB, we take a commensal approach to study its intriguing and expansive background. We survey the field for potential radio transients or variables. We apply the LOFAR Transients Pipeline (TraP) …
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Early time dynamics & longitudinal structure of high-energy heavy-ion collisions
… insights into the longitudinal structure of the fireball.<br /><br /> In the first main part of the thesis, we simulate the 3+1 D classical Yang-Mills dynamics of the collisions of longitudinally extended nuclei, described by eikonal color charges in the CGC framework. By varying the longitudinal …
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Foundational Investigations & Astronomical Implications of Quantum Gravity
… between the Lorentz factor of a pulse-producing "fireball" and the TeV energy scale. For an ordinary toroidally compactified extra dimension, transient radio-pulse searches probe the electroweak energy scale (â ¼0.1 TeV), enabling comparison with the Large Hadron Collider.
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