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 75 for “"Icy"”.
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Thermal history models of icy satellites.
Thesis. 1975. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Icy futures : carving the northern sea route
The research examines intersections between globalisation and climate change in the (re)emergence of a 'Northern Sea Route' through the Russian Arctic, which some speculate could soon rival or replace the Suez Canal as major global trade artery. The research explores shifts in the contemporary …
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Thermal Drilling and Anchoring on Icy Planetary Bodies
… under vacuum. For safe mobility in the toughest icy terrains, a single anchor should be capable of supporting an entire rover’s weight. Anchoring strengths in excess of 130N were demonstrated, which is the full weight of 100kg on Europa. This 130N anchoring force was supported by even the weakest …
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Chemical composition of Saturn's rings and icy satellites.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1974.
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Modeling Non-Rotational Ocean Circulation and Heat Distribution in Icy Moons
Subsurface oceans beneath the ice shells of icy moons like Europa and Enceladus are considered promising environments for extraterrestrial life. Their long-term habitability depends on internal heating and efficient vertical heat transport to maintain liquid water beneath the surface. This study …
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Deformation of icy moons induced by heat flux variations from the ocean
Title: Deformation of icy moons induced by heat flux variations from the ocean Author: Martin Kihoulou Department: Department of Geophysics Laboratoire de Planétologie et Géosciences Supervisor: Prof. RNDr. Ondřej Čadek, CSc., Department of Geophysics Dr. Gaël Choblet, Laboratoire de Planétologie …
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Cryogenic penetration and relaxation behavior of dry and icy lunar regolith simulants
NASA and other international space agencies have identified a return to the lunar surface as a primary objective for the coming decade. Speculation about resources in space – from platinum-group metals to water ice – has permeated space-focused media, culminating with the establishment of a price …
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Effect of temperature-dependent ice properties on ice shell convection for icy ocean worlds
… are a critical control on the habitability of icy ocean worlds. Here, we present a systematic study evaluating the effect of temperature-dependent material properties on these dynamics. We review the published thermal conductivity data for ice, which demonstrates that the most commonly used …
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Icy Satellite Tectonic, Geodynamic and Mass Wasting Surface Features: Constraints on Interior Processes and Evolution
… types of geologic features found on three icy satellites of Jupiter and Saturn, and the resulting data. Trends in the data provide insight into feature formation, and to both surface and interior processes occurring in icy satellites. Topics include: i) linear features and despinning …
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Manufacture and characterization of sintered icy lunar regolith simulants, and implications for space resources and planetary science, The
… reserves, which will be followed by excavating icy lunar regolith, and extracting the volatiles from within it. Before any of these activities can be performed, icy lunar regolith must be characterized and understood, beginning with the emplacement and modification of water ice in lunar cold …
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Design and Construction of an Optical Polarimeter for the Study of Ice-like Analogs using Near Zero Phase Angle Measurements
… effects. Radar data for Mercury, Moon and other Icy Galilean satellites exhibit high circular polarization ratios with decreasing phase angle that indicates the possible presence of icy deposits in the polar craters. An examination of powder samples with known composition and grain sizes was …
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Synthetic, Structural and Thermochemical Studies of N-Heterocyclic Carbene (NHC) and Tertiary Phosphine Ligands in the Ni(CO)2(L)x (L-PR3, NHC) Systems
… carbenes of the type Ni(CO)2(NHC)2 (NHC = ICy [N, N'-bis(cyclohexylimidazol)-2-ylidene], IMes [N, N'- bis(2, 4, 6-trimethylphenyl)-imidazol)-2-ylidene]) have been prepared. The complexes Ni(CO)2(ICy)2 (8) and Ni(CO)2(IMes)2 (9) have been synthesized and characterized by single crystal X-ray …
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Deformation and its surface expression in stressed planetary materials
… surfaces. When forces change within rocky and icy layers of planetary bodies, constituent materials of these layers adjust on the microscale; energetically favorable alignment of microstructural materials builds across scales to result in deformation, preferred directions for material transport …
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Nature and Dynamics of Earth and Planetary Cores From High-Pressure Properties of Iron -Rich Alloys
… structure and thermal evolution of large icy satellites such as Ganymede and Callisto. The successful TDTR measurements at high pressures make a solid step towards obtaining the thermal transport properties of iron and iron-rich alloys under extreme conditions.
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Planetary Seismology using Single-Station and Small-Aperture Arrays: Implications for Mars and Ocean Worlds
… results for a future surface mission to an icy ocean world. If mock-lander instruments were unprotected from the wind, noise levels were 50 dB higher than those on the ground. However, once seismometers were shielded via burial, noise performances were similar to the ground-coupled …
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Experimental and Modeling of Pneumatic Tire Performance on Ice
… interaction dynamics, it is evident that icy road conditions and tire operational parameters play a vital role in determining the overall performance of the vehicle. With the reduction of traction available at the surface in icy conditions, the dynamics of the vehicle becomes more …
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A Histological Study of the Effects of Controlled Freezing on Human Gingival Tissue
… The prefix CRYO-derives from the Greek KRYMOS (icy cold). Cryosurgery, or the clinical use of freezing procedures, is distinct from the cold applications used to reduce fever or swelling and to alleviate pain. It also differs from the moderate reduction in temperature effected by hypothermia or …
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Autonomous Salting Robot: A Deicing Revolution
… two issues threatening individuals living in icy conditions: injury due to slipping and falling while salting walkways and avoidance of salting due to the laborious nature of the task. Introducing the ASR eliminates these problems by offering consumers an autonomous method of deicing walkways …
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Identifying cold-air damming in the region of the Ozark Plateau
Following the events of March 2014 in which icy, hazardous conditions stranded motorists along the roadways and interstate highways of eastern Arkansas, an investigation is launched to determine if the event was the result of cold-air damming occurring in the region. This investigation led to a …
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Feedback control of many differential-drive robots with uniform control inputs
… control for an ensemble of robots with unicycle kinematics under the constraint that every robot receives ex- actly the same global control inputs. Each robot in the ensemble scales its given control inputs by a bounded model parameter and thus may achieve a turning rate and forward speed …
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