Digital Commons Network^™

Characterization And Generation Of Streaming Video Traces, John N. Shahbazian

USF Tampa Graduate Theses and Dissertations

This thesis describes two methods collectively called Time Series Generation (TSG) that can be used to generate time series inputs modeling packet loss to test IP-based streaming video software. The TSG methods create packet loss models that recreate the mean, variance, and autocorrelation signatures of an actual trace. The synthetic packet loss traces can have their inherent statistics altered, thus allowing for thorough testing of video software in ways that could not be done on actual networks. The two methods comprising TSG, which are individually called the primary and secondary method, use the principle of iterated uniformity to create a …

Characterization And Formation Of Particulate Nitrate In A Coastal Area, Melissa Cheryl Foster Evans

USF Tampa Graduate Theses and Dissertations

Particulate nitrates play important roles in the atmosphere. They consist mainly of NH₄NO₃ and NaNO₃, products from the reactions of gaseous HNO₃ with gaseous NH₃ and sea salt, respectively. The gas-to-particle phase conversion of nitrate changes its deposition characteristics and ultimately changes the transport and deposition rates of the locally produced species. Studies were conducted to develop background information on the particle concentrations and size distributions and the chemistry and kinetics behind the interactions.

The predominant nitrate species in the Tampa Bay area was identified as coarse mode NaNO₃. NH_{4 …}

Evaluation Of Pile Driving Lead Section, Kadir Uslu

USF Tampa Graduate Theses and Dissertations

Driving piles constitute a large portion of the high-capacity foundations used today. They transfer structural loads to deep bearing strata when adequate surficial soils are not available. The mechanisms required to install these piles generally consist of a hammer, hammer lead, a crane, and various support rigging.

This study focused on lead sections, specifically, one which was manufactured by Berminghammer Foundation Equipment, Inc. The dimensions and strength of a lead section must be capable of supporting both the pile driving hammer and the longest anticipated pile for a given site. The strength of the section must be capable of withstanding …