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 2644 for “"planetary"”.
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Subsurface Planetary Investigation Techniques and Their Role for Assessing Subsurface Planetary Composition
<p>Subsurface planetary investigation techniques are of high interest and importance for the scientific community. Not only they can enhance our knowledge of the history of planetary formation but also can lead to information about its future. Whether the investigation is being conducted remotely …
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Aspects of planetary formation.
… Institute of Technology. Dept. of Earth and Planetary Sciences.
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Fluids in Planetary Systems
From the early stages of planetary accretion and differentiation to the geomorphology of planetary surfaces and the evolution of life, fluids play an integral role in shaping planetary bodies. Fluid properties and processes were investigated under a range of planetary conditions through (1) …
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Planetary Materials Science and Astrobiology
Planetary materials contain signatures of diverse processes in their mineralogy, chemistry, textures and assemblages. The record contained in planetary materials reflects the complex and commonly overprinting relationships between many processes. Discerning what mechanisms have operated to produce …
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Planetary Praxes and Sustainable Universities
What is sustainability in Higher Education (HE)? How should it be represented? Who gets to decide? This thesis offers a response to a particular technocratic and teleological way of thinking about sustainability in Higher Education, which has a series of high profile advocates in theory and policy. …
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Local Extinctions for Planetary Nebulae
Made available in DSpace on 2014-12-14T05:15:28Z (GMT). No. of bitstreams: 1 7708977.pdf: 6128946 bytes, checksum: 96a303b573cca8583e508b0d8fb3d2e4 (MD5) Previous issue date: 1976
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Population Discrimination Among Planetary Nebulae
Made available in DSpace on 2014-12-09T18:33:59Z (GMT). No. of bitstreams: 1 6808092.pdf: 3154378 bytes, checksum: 4222944d29d2612abb1cafac0f157c8f (MD5) Previous issue date: 1967
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Planetary radar ranging error analysis.
… Institute of Technology, Dept. of Earth and Planetary Sciences, 1971.
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Infrasound Propagation in Terrestrial Planetary Atmospheres
… acoustic waves in different terrestrial planetary atmospheres. The model, which includes gravity, molecular viscosity, and thermal conduction, has been developed using numerical solutions in Fortran, and is validated for the atmospheric conditions of Earth, Mars, and Venus. Empirical …
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Algorithmic thinking in Babylonian planetary theory
… (BMA). Through analysis of procedure texts and planetary tables, it demonstrates that Babylonian astronomers employed systematic techniques resembling sequential execution, conditional branching, and procedure calls, while also anticipating higher-level structures such as iteration, recursion, …
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Small-scale structures in planetary nebulae
Two planetary nebulae (PNe) were studied in order to investigate small scale molecular structures in planetary nebulae, the survival of which affects the structure and composition of the interstellar medium (ISM) from which the next generation of stars is born. Molecular hydrogen (H[subscript 2]) …
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Three essays on our planetary future
… as a normative inquiry, the thesis advances the “planetary future” as a generative political metaphor. Reflecting the tension between natural dependency and human freedom, this metaphor aims not only to remind us of our shared vulnerability, as engendered by ecological decay and omnicidal weapons, …
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Modelling biogeochemical controls on planetary habitability
… cycles that may serve to regulate planetary climate. A stellar evolution model was developed to investigate the control of increasing main-sequence stellar luminosity on the boundaries of the radiative habitable zone, which was then coupled with a zero-D biogeochemical carbon cycle …
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The Evolution of Planetary Nebula Nuclei
The evolution of planetary nebula nuclei (PNNs) is examined with the aid of the most recent available stellar evolution calculations and new observations of these objects. Their expected distribution in the log L-log T plane is calculated based upon the stellar evolutionary models of Paczynski, …
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Trajectory optimization involving powered planetary swingbys,
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1973.
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Increased autonomy for planetary rover operations
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Hydrogen-deficient central stars of planetary nebulae
Central stars of planetary nebulae are low-mass stars on the brink of their final evolution towards white dwarfs. Because of their surface temperature of above 25,000 K their UV radiation ionizes the surrounding material, which was ejected in an earlier phase of their evolution. Such fluorescent …
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Rotating, hydromagnetic laboratory experiment modelling planetary cores
… a series of laboratory experiments motivated by planetary cores and the dynamo effect, the mechanism by which the flow of an electrically conductive fluid can give rise to a spontaneous magnetic field. Our experimental apparatus, meant to be a laboratory model of Earth's core, contains liquid …
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A Network Communications Strategy for Planetary Habitats
… have become key design constraints in planetary habitats. This thesis develops and evaluates a method for integrating communications infrastructure within the architectural design of planetary habitats. To lay the groundwork and baseline for required data and systems in a planetary …
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