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 88 for “"Observatories"”.
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Ray-based Physical Optics for the Design of Astronomical Observatories
… performance limiter for astronomical observatories that seek to image earth-like exoplanets. These observatories are outfitted with coronagraphs, which are designed to image faint stellar companions at high contrast using specialized pupil-plane and image-plane masks. When imaging …
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An investigation of body wave magnitude using the new digital seismic research observatories plus conventional catalogue data
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
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The Spatialization of Knowledge and Power at the Astronomical Observatories of Sawai Jai Singh II, c. 1721-1743 CE
… Centered on a group of five astronomical observatories built between 1721 and 1743 CE under the patronage of the Maharaja Dhiraja of Jaipur and Amer, Sawai Jai Singh II, this project is an analysis of the relationship between patron, architecture, and space, and as such, represents an …
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The new SAAO infrared photometric standards based on the E regions
… have been set up at the other main southern observatories, i.e. the two Australian observatories, Mount Stromlo and Siding Spring Observatory CMSO) and Anglo-Australian Observatory (AAO) and the two observatories in Chile, European Southern Observatory (ESO) and the Cerro Tololo …
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Solar wind stream interfaces: The importance of time, longitude, and latitude separation between points of observation
… longitude separation between the two observatories grew from about 2 degrees to 45 degrees. After a solar wind transition was observed at STEREO/B, the expected time-of-arrival at STEREO/A was calculated assuming ideal corotation with the Sun and negligible source evolution. The …
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High-Precision Stress Measurement in Thin Films for X-Ray Mirrors
Future X-ray observatories aim to achieve sub-arcsecond angular resolution with unprecedented sensitivity. Silicon meta-shell optics technology will enable the X-ray astronomy instrumentation community to create such an observatory. The light-weighted silicon mirrors used in meta-shell optics have …
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Gravitational microlensing and the search for extrasolar planets
… events. We analysed data obtained from different observatories: PLAXET, which includes SAAO, Sutherland, Canopus and Perth observatories, OGLE, Danish Telescope, LaSilla. For the observed microlensing target OGLE-2011-BLG-265, analysis of the data using the program supplied by Keith Horne, using …
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Cultures of Forecasting: Volatile and Vulnerable Nature, Knowledge, and the Future of Uncertainty
… practices of scientists in volcano and tsunami observatories, in planes tracking tropical storms, and bunkers dug into active volcanoes; at how instruments and technologies such as seismographs, windows, globes, speakers, and electrical tomography, mediate and transform relations with nature, …
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Radio Frequency Interference: Simulations for Radio Interferometry Arrays
… (RFI) is a massive problem for radio observatories around the world. Due to the growth of telecommunications and air travel RFI is increasing exactly when the world's radio telescopes are increasing significantly in sensitivity, making RFI one of the most pressing problems for …
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Modeling Compact Objects with Effective Field Theory
… experiments of systems that the LIGO-Virgo observatories have already detected, we show the role of the stellar structure and their coefficients in the phase evolution of the waveform, as well as the order in which they arise and the sensitivity required for the gravitational wave …
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Planar feasibility study for primary mirror control of large imaging space systems using binary actuators
… have come with advancements in ground-based observatories and space telescopes. Latest trends in ground-based observatories have been ever increasing size of the primary mirror, providing much higher apertures for more powerful image captures. The same trend can be envisioned for space …
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Wavelet analysis of geomagnetic jerks
… the geomagnetic field from 45 selected worldwide observatories. The analysis was first performed on various synthetic series made up of a """"main"""" signal of smooth variation intervals separated by singular events, a white noise and an """"external"""" signal made up of the sum of a few …
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STRONG GRAVITATIONAL LENSING MODELLING OF GALAXY CLUSTERS IN THE ERA OF BIG DATA
… accuracy. The synergy between these observatories will drastically improve the number of currently known SL systems and significantly enhance the quality of SL studies. In order to deal with large sets of galaxy clusters and/or characterized by a huge number of observables, a modeling …
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Geoneutrino production of the northern Black Hills, South Dakota, United States of America
Current neutrino observatories operate underground to isolate the detector from cosmic rays and background radiation. However, background radiation from local sources has yet to be accounted for. Current models for neutrino contributions from terrestrial rocks are formulated from bulk compositional …
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Merging neutron star and black hole binaries: Inference of their parameters and simulations of their formation and fate
… Observatory) and Virgo gravitational-wave observatories are rapidly expanding the frontiers of astrophysics. The observations enable (i) direct measurements of properties of these compact objects with information extraction from the gravitational-wave data, and seek the understanding of …
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Topics in Theoretical Gravity
… gravitational radiation. Laser interferometeric observatories are now in operation that can in principle detect some likely astrophysical sources. We study the hyperboloidal family of light beam shapes that have the potential of reducing the thermal noise and therefore increasing the sensitivity …
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Astrophysical signatures of neutron stars in compact binaries and experimental improvements on gravitational-wave detectors
… to moderate expansions. Gravitational-wave (GW) observatories such as Advanced LIGO (aLIGO) open up a new possibility to probe deep inside the NS by examining the tidal signatures in the GW waveforms.
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Non-deterministic design and analysis of parameterized optical structures during conceptual design
The next generation of space observatories will use larger mirrors while meeting tighter optical performance requirements than current space telescopes. The spacecraft designs must satisfy the drive for low-mass, low-cost systems, and be robust to uncertainty since design validation will be based …
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Radiation Damage Analysis of the Swept Charge Device for the C1XS Instrument
… that would be hard to detect using ground based observatories. However, this method introduces a number of new problems, these include placing the spacecraft into a viable and suitable orbit, pointing stability, data retrieval, power consumption, and problems associated with the vacuum of space, …
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