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Showing 1 to 20 of 1846 for “"polar"”.
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Polar frequency discriminators
This dissertation makes a study of frequency discriminators and their role in instantaneous frequency measuring (IFM) signal acquisition receivers. Frequency discriminators are the major building blocks of IFM. They are required to measure frequency accurately over very broad bandwidths and to have …
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Characterisation of polar (0001) and non-polar (11-20) ultraviolet nitride semiconductors
… of a range of UV structures, including c-plane (polar) AlGaN epilayers grown on AlN template, and nonpolar GaN/AlGaN MQWs grown on a-plane GaN template. The results are based primarily on transmission electron microscopy (TEM), cathodoluminescence in the scanning electron microscope (SEM-CL), …
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Understanding Jupiter’s Polar Vortex Crystals
… direction and speed of the circling circumpolar cyclones in a Jovian-like vortex crystal. In particular we explored the role of the circumpolar cyclone rest position relative to the pole and its influence on speed of circumpolar cyclone precession. Ultimately, it was found that, regardless …
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Understanding Jupiter’s Polar Vortex Crystals
… direction and speed of the circling circumpolar cyclones in a Jovian-like vortex crystal. In particular we explored the role of the circumpolar cyclone rest position relative to the pole and its influence on speed of circumpolar cyclone precession. Ultimately, it was found that, regardless …
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Molecular Thermodynamics of Polar Reactions
Made available in DSpace on 2014-12-13T18:55:34Z (GMT). No. of bitstreams: 1 7714993.pdf: 7733425 bytes, checksum: bcde21facc9afed46a9177a7612c78f7 (MD5) Previous issue date: 1977
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Dielectric Behavior in Polar Solvents
Made available in DSpace on 2014-12-05T19:37:27Z (GMT). No. of bitstreams: 1 6003894.pdf: 3343322 bytes, checksum: cde36891f9056e1b37e16e41dbae686d (MD5) Previous issue date: 1960
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Energy Transfer Dynamics in Collisions of Polar and Non-polar Gases with Functionalized Self-Assembled Monolayers
Molecular beam scattering experiments are used to investigate the extent of thermal accommodation of Ne, CD4, ND3, and D2O in collisions with long chain CH3, NH2, and OH terminated self-assembled monolayers (SAMs) on gold. Surface rigidity, internal degrees of freedom of the impinging gas, and …
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Multifrequency Scintillation in the Polar Caps
<p>In the ionosphere, plasma density structures with scales sizes ranging from a few centimeters to hundreds of kilometers are capable of modifying the phase and amplitude of a radio signal in a rapid random manner in a process called scintillation. The Coherent Electromagnetic Radio Tomography …
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Iron biogeochemistry in (sub-) Polar waters
Iron represents an important control on primary production in high nutrient low chlorophyll<br/>(HNLC) regimes and has received considerably attention during the last two decades. This<br/>work has focussed on the biogeochemistry of iron in two oceanic environments; the high<br/>latitude North …
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Comprehensive Model of Jupiter's Polar Aurora
… source of auroral X-ray emission from the Jovian polar caps, whether from electron bremsstrahlung or heavy ion precipitation, has been a topic of debate for the past 40 years, beginning with the Einstein Observatory's first measurement of X-ray emission in 1979. Since then the Roentgen satellite, …
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Spectral approximation by the polar transformation
… potentials V(r) are considered which admit the polar representation $V(r)=g(h(r)),$ where $h(r)={\rm sgn}(q)r\sp{q},$ q is fixed, and g is the polar transformation function. This representation allows the Schrodinger eigenvalues generated by V to be approximated in terms of those generated by …
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Cone penetration testing in polar snow
… 2010 in an attempt to assess the strength of polar snow; additionally, application of CPT data was considered, particularly in estimating surface bearing capacity. Almost 100 CPT tests were carried out and both qualitative and quantitative analysis of data was undertaken. Additional supporting …
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Polar Sea Ice Mapping for SeaWinds
… to observe global climate indicators such as polar sea ice. Advances in microwave remote sensing technology have allowed a large-scale and detailed study of sea ice characteristics. This thesis provides the analysis and development of sea ice mapping algorithms for the SeaWinds scatterometer. …
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Radar Altimetric Studies of Polar Ice
… regarding snow and ice surfaces in the polar regions, where darkness and cloud cover prevail. Here, data collected in the Arctic by a Ku-band microwave radar altimeter, designed and constructed in the UK, are analysed. The two main components of this study comprise data gathered in the …
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Structure of the polar electrojet antenna
Field experiments were performed in Gakona, Alaska in August and November 2002. The ionospheric conductivity was periodically perturbed using amplitude-modulated radiation from the HAARP HF transmitter (1 MW power, 14 dB gain, 3.3-5.8 MHz carrier, 0.1-40 kHz modulation). The conductivity …
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Viscosity of some polar vapor mixtures
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1957
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Extracting Polar Anisotropy Parameters from Seismic Data
With Vp, Vs, and density well logs, we can do isotropic AVO forward modeling, using isotropic Zoeppritz equations or its approximations, and a wavelet extracted from the seismic data, to get synthetic seismic data. Compared with real seismic data, these synthetic data are scaled differently, and …
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