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 “"night sky"”.
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The night sky brightness of Gozo
The aim of this project was to carry out Night Sky Brightness measurements in Gozo, with a view to comparing with data collected between 2017 and 2018. Current studies have shown that light pollution is on the increase. This has adversely affected the night sky and carries implications for ecology …
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PROPERTIES AND CORRELATION OF FLARES AND CORONAL MASS EJECTIONS AND THEIR POSSIBLE RELEVANCE ON THE SOUTHERN NIGHT SKY BACKGROUND : A STATISTICAL STUDY
… have a role in the observed variations of the night-sky background? The attempt to provide answers to the previous questions has been faced in this Thesis from an observational / statistical point of view. More precisely, the dataset that have been used in order to answer the first two …
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An Exploration into ‘noctcaelador’ in Young People of Generation Z
… 1995 and 2012) maintains its connection to the night sky amid the challenges and opportunities posed by modern technological and environmental contexts. The findings will contribute to the broader academic discourse of cultural astronomy, building on the work of psychologist William E. Kelly who …
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Durham All-Sky Camera (DAC)
In this work, the prototype of a Durham all-sky camera (DAC) was designed and constructed for the purpose of monitoring the night sky of Durham. The DAC consisted of a Fujinon fish-eye lens coupled to a monochrome 640-by-480-pixel CCD camera (DMK-21BF04 model from the ImagingSource) housed in an …
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ROAD : Rapid Optical Asteroid Detection
… streaks at the detection limit in video of the night sky. Tilt and the 3DRT are asymptotically optimal algorithms for the blind search problem, which seeks to identify near-Earth asteroids of arbitrary position and velocity using ground-based optical systems. In the process of establishing the …
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After Dark: Reading Canadian Literature in a Light-Polluted Age
… at an enormous cost. The International Dark-Sky Association has recently estimated that the energy expended on light scatter alone is responsible for no less than twelve million tons of carbon dioxide and costs municipal governments at least $1 billion annually (“Economic Issues” 2). Emerging …
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Throwing The Bones
… role do dreams play in remembering? How does the night sky connect humans to non-human animals and them both to the earth? Driven by my fierce desire to know, these essays engage deeply and creatively with research, narrative, and place in an effort to make meaning and forge connections between …
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Investigation of Mountain Waves in the Mesosphere over the Andes Mountains
… been developed to analyze data from a NIR All-Sky Imager of OH airglow emission (from about 87 km altitude), located in the Andes, with the purpose of investigating the atmospheric gravity waves generated when low level wind blows over the high mountains (referred to as Mountain Waves). These …
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Emission Line Galaxies from CADIS : High Redshift Lyman-Alpha Galaxies and Metal Poor Galaxies at Medium Redshift
… lines in three waveband windows, free of night-sky emission lines, at 700 nm, 820 nm, and 920 nm. Metal poor galaxies at 0.4<z<0.7 have been selected by their high [OIII]5007 / [OII]3727 ratios. Their oxygen abundances, determined by follow-up spectroscopy, indicate that the …
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Techniques for automated classification of nighttime ionospheric images
A large database of images of the night sky above Hawaii and Chile is being collected in order to study ionospheric structures. The images of interest are those that contain equatorial plasma bubbles (EPB) or medium-scale traveling ionospheric disturbances (MSTID). However the majority of the …
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Pulsating aurora: Source region & morphology
… aurora, a common phenomenon in the polar night sky, offers a unique opportunity to study the precipitating particle populations responsible for this subtle yet fascinating display of lights. The conjecture that the source of these electrons originates near the equator, made decades ago, …
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A dynamic web interface to a remote robot evaluated with a robotic telescope.
… not be able to appreciate the wonders of the night sky due to light pollution. Whenever weather and darkness permits, the robot processes the observation requests submitted by users via the Internet, operating all the hardware including the dome, telescope mount and cameras. The question of …
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Extreme universe space observatory on a super pressure balloon II fluorescence telescope on the ground and (briefly) in the air, The
… FT was determined to be roughly one UHECR per night of observation. These simulations and pre-flight expectations were validated by a successful field campaign in the Fall of 2022 which included measurements of calibrated light sources as well as the night sky. After a successful launch, the …
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Aladdin's Magic Lamp: Developing Methods for Calibration and Geolocation Accuracy Assessment of the DMSP OLS
<p>Nighttime satellite imagery from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) has a unique capability to observe nocturnal light emissions from sources including cities, wild fires, and gas flares. Data from the DMSP OLS is used in a wide range of studies …
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Lucky exposures: diffraction limited astronomical imaging through the atmosphere
… Nordic Optical Telescope means that 25% of the night sky is within range of a suitable reference star for I-band imaging. Typically the 1%—10% of exposures with the highest Strehl ratios are selected. When these exposures are shifted and added together, field stars in the resulting images have …
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The Wide-Field Infrared Transient Explorer (WINTER): a new near-infrared time-domain survey
… time-domain astronomy, the study of the evolving night sky. The field has exploded in the last two decades at optical wavelengths, but complementary infrared efforts have been limited by available detector technologies. In this thesis, I present the design, build, and early operations of the new …
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Placing outer space : an earthly ethnography of other worlds
… to a Chilean observatory where she studied the night sky hoping to find a "habitable planet." Many other astronomers share this goal and have designed various ways to detect a planet like Earth. The importance of these projects signifies that exoplanet astronomers are more interested in finding …
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Material Fluidity: Sense - Will - Form, Alexandria, Virginia Maritime Museum
… etching the pattern of the tides in the night sky and measuring its own shifting form in relation to the moon - its form, constantly reformulates itself, and is analogous to the ebb and flow of progress in history of maritime navigation. Located on North Union Street in Alexandria, …
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The Steeple of Light : from Frank Lloyd Wright's architectural proposal to Dale Eldred and Roberta Lord's light sculpture
… of Light which rises more than a mile into the night sky, constituting one of Kansas City’s most iconic landmarks. Powerful Xenon lamps installed on the roof of the Community Christian Church create four light lines that converge in the distance to render a breathtaking spire of light. The …
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Towards Gamma-Ray Telescopes in Australia
… two thirds of the Southern Hemisphere gamma-ray sky. Short-term and variable events, or “transients”, in the Australian night sky would thus be unobservable. To this end, Monte Carlo simulations of hypothetical IACT arrays were created to determine and optimise the expected performance and …
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