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 21 for “"Space Studies"”.
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A fluid loop actuator for active spacecraft attitude control - A Parametric Sizing Model and the Design, Verification, Validation and Test with a Prototype on an Air Bearing
Active spacecraft attitude control by using a pumped fluid as the inertial mass has potential advantages over reaction wheels, including high torque, lower power consumption, reduced jitter and prolonged lifetime. Previous work addressed conceptual and mission-specific control aspects, and one …
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Investigation Of Material Properties Of Sintered Black Point-1 Lunar Regolith Simulant
The quest for establishing a human presence and development beyond the Earth, especially on the moon has opened up opportunities for future plans for lunar bases and settlements. However, the cost of using resources outside the lunar environment can inhibit this form of expansion, therefore the …
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Firmware Design and Testing for Data Handling and Control of Time Delay Integration Image Sensors in an Earth Observation Payload
Earth observation is becoming more and more important in this age of information. It provides critical information in every field of work be it military, scientific research, disaster management, urban planning and many others. Better planning in all these fields is possible with more detailed …
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Mechanical Structure Design and Analysis of Focal Plane Unit (Fpu) for Earth Observation (Eo) Payload
… image plane in the temperature extremes of the space environment. Secondly, the mechanics also needs to handle harsh launching loads to get the satellite in space. The important constraints of this design are the mass and volume which need to be considered during the design. Optical performance …
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On the feasibility of landing the dream chaser space vehicle in South Africa
The Dream Chaser is a space vehicle currently under development by the Sierra Nevada Corporation for purposes of carrying humans and cargo to low Earth orbit. In 2016, the United Nations entered into an agreement with Sierra Nevada Corporation to fly experimental payloads on the Dream Chaser. The …
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Design of the Electronics Subsystem for a High-Resolution Electro-Optical Payload Using Systems Engineering Approach
… meticulous characterizations of high-resolution space applications. This dissertation puts forward the argument that the system being studied is a subsystem of a larger system and that systems engineering principles can be applied to the subsystem design process also. The aim of this dissertation …
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Space Art + Space Science a polymathic paradigm shift in the art/science dialogue
… has been more influenced by the arts than space exploration. The artistic visions of yesteryear are the technological realities of today. These realities in turn create new possibilities for artistic expression. However, Space Art and Space Science have shared a convoluted history. Their …
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Low cost and portable software defined radio ground station
… enhanced their popularity. Now that getting into space has become more accessible there is an influx of information available from small satellites, however the information is not being utilized too efficiently on Earth. One reason as to why this is evident is because traditional ground stations, …
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Identifying Ionospheric Scintillation in the South Atlantic Magnetic Anomaly using motion-affected GPS data from a ship-based receiver
… variations along the ray path. As a result, spacebased navigation systems can encounter increased errors in position accuracy or complete loss of lock. These are risk factors for modern aircraft and ocean vessels which rely on access to accurate Position, Navigation and Timing (PNT) services …
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Designing of a solar panel deployment mechanism for small satellite
… has been a considerable increase of low cost space mission. Almost every small satellite has appendages like Solar Panels OR Antennas. These appendages have large inertial forces with low structural rigidity and mass to size ratio. These appendages are in stowed position in launcher to …
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Evaluating the Performance of the Resampled nSight-2 Sensor's Spectral Configuration in Discriminating Wetland Plant Species Using Advanced Classifiers and Spectroscopy.
… that carries strategic wavebands for vegetation studies, i.e. red-edge and near-infrared. The study also evaluated the performances of non-parametric machine learning algorithms in classifying wetland plant species using nSight-2 spectral configuration. The results showed a high discrimination …
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Queue scheduling the Alan Cousins Telescope
The Alan Cousins Telescope is a 0.75-m automatic photoelectric telescope situated at the South African Astronomical Observatory, in Sutherland. The telescope was designed and built to execute a range of photometry programmes, but is used mainly for the long-term monitoring of variable stars. In …
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Estimates on Oscillatory Singular Integral Operators
… to the operator’s behavior over any function space. Studies on such operators are rooted in the deep theories developed by Fourier, Calder´on, Zygmund, and Stein. In this work we show results on a new oscillatory singular integral operator with Calder´on-Zygmund kernel and a generalized phase …
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Soundscape and the Experience of Positive Silence
… within the related fields of Sound Art and Sound Studies with the practice component including soundwalks, sound installation, exhibition and phenomenological enquiry initiated through listenings and reflections. Current research in this area has explored the value of silence through quiet space …
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Introducing Astronomy Into High School Physics Curriculum Through The Use Of The University Of North Dakota Observatory
… field trip to the John D. Odegard School of Aerospace Sciences to tour Aviation and Space Studies facilities at UND on April 25, 2012. Students were given a pre-test at the start of the course, daily exit surveys at the end of each class period, and a post-test at the end of the two weeks. These …
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The Asteroid Miners: Space Mining and Resource Making in the Commercial Space Era
… bubble had burst." One, written by prolific space industry journalist, Jeff Foust, explained that the question of whether or not the space mining industry had "boomed" or "bubbled" had been answered, as almost all existing space mining companies at the time had been acquired by other …
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Single Layered Periodic Structure Loaded Textile Patch Antennas
… the application of wearable antenna arrays with space suit, since this thesis has collaboration with the University of North Dakota (UND) Space Suit Laboratory in the Space Studies Department. Topics include; platform interaction and placement of the antenna system. The goal is to increase …
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Therapeutic targeting of the ATP7A copper transporter in cancer
… to export excess Cu into the extracellular space. Studies have shown that many cancer cells exhibit increased Cu demand. Elevated Cu levels have been linked to enhanced kinase activity of MEK1/2 and ULK1/2, promoting tumor growth in BRAF- and KRAS-driven cancers. Cu has also been reported to …
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An evaluation of the effects of floor space and lysine deficient diets on the growth rate of finishing pigs and an analysis of post-restriction compensatory gain
… of market weight pigs with no available shackle space to be harvested. Due to this, producers worked to implement strategies to slow the pigs’ growth as they approached market weight. Due to facility limitations within a processing plant, pigs exceeding 136 kg are not easily harvested and …
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