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 160 for “"GW"”.
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A Full-Wave Investigation of the Use of a 'Cancellation Factor' in GW-Airglow Interaction Studies
<p>Atmospheric gravity waves (GWs) perturb minor species involved in the chemical reactions of airglow emissions in the mesopause region of the earth's atmosphere. The so-called 'Cancellation Factor' (CF) is defined as a transfer function relating the amplitude of airglow brightness fluctuation to …
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THE ASTROPHYSICAL GRAVITATIONAL WAVE BACKGROUND: IMPACTS OF PRIMARY AND SECONDARY ANISOTROPIES ON THE GW-LSS CROSS-CORRELATION
… quiet, weak and independent sources of GWs of either astrophysical (Astrophysical Gravitational Wave Background-AGWB) or cosmological origin create a Stochastic Gravitational Wave Background (SGWB). In this work we focus on AGWB energy density anisotropies. Major contribution to such …
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The search for unmodeled gravitational-wave transients in the Advanced LIGO-Virgo Era
… 2015 and 2017, the era of gravitational-wave (GW) astronomy began in a spectacular fashion. The Advanced-era GW detectors directly observed GW transients from two types of compact-binary sources: binary black holes (e.g., GW150914) and binary neutron stars (e.g., GW170817). Compact-binary …
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Development of techniques for quantum-enhanced laser-interferometric gravitational-wave detectors
… laser- interferometric gravitational wave (GW) detectors was carried out. The basic theory of GWs and laser-interferometric GW detectors, quantum noise in GW detectors, the theory of squeezed states including generation, degradation, detection, and control of squeezed states using …
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Bestimmung der Masse und Breite des W-Bosons im semileptonischen Zerfallskanal mit dem OPAL Detektor bei LEP
… Bestimmung der Masse Mw und der Zerfallsbreite Gw des W-Boson genannten Eichbosons. Analysiert wurden dazu Daten, die mit dem OPAL-Experiment in den Jahren 1997 bis 2000 aufgezeichnet wurden. Von den möglichen Zerfällen der erzeugten W-Bosonpaare werden nur semileptonische betrachtet, bei denen …
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Exploring Chinese Graduate Students' Learner Identity in Group Work in Western Academia: Perceptions, Representations and Challenges
Group work (GW) is commonly used in many countries around the world. The emerging predominance of GW assignments represents a major trend in higher education (Burdett & Hastie, 2009) as employers highly value teamwork skills and seek the development of these in university graduates (Cranmer, 2006). …
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Enhancing the detection and the reconstruction of gravitational-wave transients in the LIGO-Virgo-KAGRA data using weak assumptions on the astrophysical sources
… the first observation of a gravitational-wave (GW) in 2015, the LIGO and Virgo detectors reported tens of astrophysical signals interpreted as mergers of compact objects. These observations provide invaluable tests of the General Relativity and open a new era of astronomy, unveiling compact …
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Evaluation of drug-drug interaction in the EHR data
… (emergency department, ED; general ward, GW; intensive care unit, ICU). We also tried to reveal the difference in drug pairs causing DDI alerts and reasons for alert overrides among the three departments by analyzing a longitudinal electronic health record (EHR) data and its alert and …
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Dynamics of Atmospheric Gravity Wave Breaking in the Mesopause Region
<p>GWs significantly impact the Mesosphere and Lower Thermosphere (MLT), and as a consequence of GW breaking, atmospheric turbulence plays an essential role in the mixing and transport of momentum, mass, and chemical materials in MLT. The main focus of this research for the fulfillment of the …
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Deep learning methods for enabling real-time gravitational wave and multimessenger astrophysics
A new era of gravitational wave (GW) astronomy has begun with the recent detections by LIGO. However, we need real-time observations of GW signals and their electromagnetic (EM) and astro-particle counterparts to unlock its full potential for scientific discoveries. Extracting and classifying the …
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Advances in Gromov–Wasserstein optimal transport: linearization, multi-marginal generalization, barycenters and transfer operators
… with a primary focus on the Gromov–Wasserstein (GW) transport problem. Figuratively, this transport problem offers a relaxed way of finding a correspondence that retains the geometry between given inputs, and evaluating how far they are from being isometric. After briefly introducing various …
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Effect of the GentleWave System on dentin microhardness and sealer penetration: an in vitro study
… study investigates the impact of the GentleWave (GW) System on dentin hardness and sealer penetration in root canal treatment, aiming to assess its potential advantages over conventional techniques. Conventional instrumentation can alter root canal anatomy, necessitating irrigation methods that …
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Studies of gravity wave and thermal tide and their interactions in the middle atmosphere
Gravity waves (GWs) and tides are two strongest and most persistent waves in the middle atmosphere of the Earth. They are usually generated in the lower atmosphere and propagate upward to the middle and upper atmosphere, where they play important roles in the atmospheric composition, chemistry, …
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Investigation of a gravity wave ducting event in the upper mesosphere
Atmospheric gravity waves (GWs) play an important role in the transport of energy and momentum throughout the Earth’s atmosphere. GW effects couple the lower regions of the atmosphere with the middle and upper regions of the atmosphere and the neutral atmosphere with the ionosphere. The effects are …
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Quasiparticle calculations in atoms and many-body core-valence partitioning
… Method calculations in atoms using Hedin's GW approximation with various vertex corrections, leading to polarizabilities and quasiparticle energies, which are electron addition (removal) energies corresponding to the lowest few unoccupied (highest few occupied) electron states. Issues of …
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Quasiparticle calculations in atoms and many-body core-valence partitioning
… Method calculations in atoms using Hedin's GW approximation with various vertex corrections, leading to polarizabilities and quasiparticle energies, which are electron addition (removal) energies corresponding to the lowest few unoccupied (highest few occupied) electron states. Issues of …
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Pulsations in the white dwarf primary of a cataclysmic variable star
… of preliminary observations of the Dwarf Nova GW Librae , the first Cataclysmic Variable star found to have a DAY primary. A brief introduction to Cataclysmic Variables and the pulsating white dwarfs is given, and the significance of GW Librae to these fields of study is discussed. In this …
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Analysis methods for gravitational wave from binary neutron star coalescences: investigation on the post-merger phase
… sources for advanced gravitational wave (GW) detectors. The forthcoming addition of the advanced Virgo interferometer to the LIGO detector network will greatly improve the estimation of GW characteristics and therefore the capabilities to test features in the GW signal emitted by the …
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