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 66 for “"local time"”.
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A Non-Standard Approach to Brownian Local Time
Made available in DSpace on 2014-12-14T13:09:44Z (GMT). No. of bitstreams: 1 8009129.pdf: 5475012 bytes, checksum: dd01d0cf8640e1df34440035d4865bbe (MD5) Previous issue date: 1979
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Local Time as a Derivative of Occupation Times
Made available in DSpace on 2014-12-09T22:17:24Z (GMT). No. of bitstreams: 1 6604190.pdf: 1210328 bytes, checksum: a7bb08b2abe8bf9efa914578800eb8bb (MD5) Previous issue date: 1965
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On the Interaction between Gravity Waves and Atmospheric Thermal Tides
… GWs, tides and their interactions on a local time scale instead of a global scale in the two GCMs. The local time GWs in eCMAM are found to have a strong seasonal dependence, with the majority of the forcings at the winter pole at latitudes where the diurnal variations are weak limiting …
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A study of interhemispheric magnetic conjugacy and large scale magnetosphere-ionosphere coupling using SuperDARN radars
… boundary, ionospheric conductivity and magnetic local time. In chapter 4, we use data from the mid-latitude SuperDARN radars between Jan-2011 and Aug-2012 to compile a database of SAPS events spanning about six hours in magnetic local time. The event database is used to analyze the average …
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Comparison and Investigation of Solar Spectral Irradiance with Solar Aspect Monitor
… ISS orbit allows observations from 7:00 to 16:00 local hours over a one-month period from mid-June to mid-July of 2010 and observation of the local-time variation of NO abundance in the lower thermosphere is derived. The uniquely stable solar activity during 2010 allows the local time variation of …
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Hydrodynamic Characterization of 3D Fluidized Beds Using Noninvasive Techniques
… are opaque. Traditionally, the monitoring of local fluidized bed hydrodynamics has been done with intrusive probes that disturb local structure and the collection of data over large areas is time consuming. X-ray computed tomography (CT), as a noninvasive technique, can quantify local …
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Understanding how low energy electrons control the variability of the Earth's electron radiation belts
… hazards to operational satellites. On the timeframe of hours, both the energy and particle flux of the radiation belts can change by orders of magnitude. Variations in the high energy relativistic electron flux depend on transport, acceleration, loss processes, and importantly, on the lower …
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An Experimental Investigation of Thermal Boundary Layer Structure and Heat Transfer in Oscillating Flows Using CARS Spectroscopy and Cold -Wire Anemometry
… to provide a more detailed description of the time-resolved structure of a thermal boundary layer in the oscillating flow. The cold-wire technique provides for increased data acquisition rates relative to CARS, at the expense of an ambiguous, systematic error associated with the intrusive …
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Preconditioning techniques for stochastic partial differential equations
… thesis is about preconditioning techniques for time dependent stochastic Partial Differential Equations arising in the broader context of Uncertainty Quantification. State-of-the-art methods for an efficient integration of stochastic PDEs require the solution field to lie on a low dimensional …
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Momentum, mass, heat, and vorticity balances from oceanic measurements of current and temperature
The local dynamics of low-frequency motions in the MODE region are investigated from three arrays of moored measurements of current and temperature. Tests for lowest-order balances of horizontal momentum, mass, heat, heat and vorticity within established errors are carried out. Geostrophic …
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Describing and Predicting Breakthrough Curves for non-Reactive Solute Transport in Statistically Homogeneous Porous Media
… can be specified in several ways namely, local time-dependent dispersivity, average time-dependent dispersivity, apparent time-dependent dispersivity, apparent distance-dependent dispersivity, and local distance-dependent dispersivity. Theoretical analysis showed that, when dispersion was …
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Experiences of district nurses working during the September and February 2010 - 2011 earthquakes in Christchurch, New Zealand
… in the world and on 4 September 2010 at 4.35am local time, Christchurch in New Zealand’s South Island experienced a 7.1 magnitude earthquake. A second earthquake of 6.3 magnitude struck on 22 February 2011 at 12:51pm local time. Although the first earthquake rated higher on the Richter scale, it …
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Heat transfer from a circular cylinder in a pulsating crossflow
… cylinder were experimentally determined. Local, time-averaged heat transfer data at constant wall temperature is reported for Reynolds numbers between 3 x 10<sup>4</sup> and 9 x 10<sup>4</sup>. Pulsation amplitudes were generally small (<10 per cent) with frequencies up to and beyond the …
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A Geographical Comparison of the Relationship Between Aerosol Optical Depth and Fine Particulate Matter in Indiana
This study looked at the time period of June through mid-October, 2013, based on the results of earlier studies that the strongest correlation between the PM2.5 and AOD data sets occurs during the summer and fall. Terra satellite data was used in this study due to availability of images for the …
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Non-migrating tides in the Martian thermosphere
… higher latitudes and allow for studying the local time variations of tides. The analysis presented here shows that the longitudinal structure attributed to non-migrating tides is dominated by wavenumber 2 and wavenumber 3 harmonics during the periods studied. Comparison with the Neutral Ion …
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Visualizing fluidized beds with X-rays
… operating with a variety of flow conditions. 3-D local, time-averaged gas holdup is calculated from CT data, while dynamic features are captured by X-ray stereography. The results show that CT is most effective on glass bead fluidized beds. Due to high X-ray attenuation, glass bead CT data has …
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Development of an efficient 3-D CFD software to simulate and visualize the scavenging of a two-stroke engine
… to efficiently simulate the three-dimensional, time-dependent, Navier-Stokes equations within the complex, real-world geometry of the two-stroke engine with moving piston and rotating crankshaft. Due to the high temperature in the cylinder after combustion, a temperature dependent treatment of …
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Spatiotemporal variation of PM2.5 over the contiguous United States
… This research aims to identify the locations, times of day, and months of the year at which people are most likely to be exposed to high PM2.5 concentrations using data from ground monitors across the contiguous United States. K-means clustering was utilized to group of the diurnal and seasonal …
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Vertically Propagating Tides in the Martian Atmosphere
… are strongest in the upper atmosphere in a fixed local time reference frame. However, the energy carried by these tides and the region of deposition has not been well characterized. Moreover, it has been challenging to obtain a global understanding of the behavior of tides due to observations …
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On Self-Similar Gaussian Processes
… integrability conditions. The existence of the local time and a version of Tanaka's formula are derived. These results are applied to a general class of self-similar processes that includes the bifractional Brownian motion. On the other hand, we establish a comparison result on the Laplace …
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