In his first term as president, George W. Bush was confronted with one of the worst national attacks in United States history: the September 11 terrorist attacks of 2001. Through the devastation, however, President Bush triumphed in unifying and guiding this nation during what would become the height of his rhetorical leadership. Following his reelection in 2004, President Bush faced one of the worst natural disasters in the nation's history: Category 4 Hurricane Katrina. In its aftermath, Katrina became known as "one of the worst mishandled disasters ever." Utilizing Kenneth Burke's pentad, this study analyzes the president's rhetorical response and the primetime network news coverage following each crisis in an attempt to determine how President Bush could fare so well in one instance, consoling and leading the American people, while falling short in his second major crisis during his term as president. / Master of Arts

Práce pojednává o využití support vector machines v detekci řečové aktivity. V první části jsou zkoumány různé druhy příznaků, jejich extrakce a zpracování a je nalezena jejich optimální kombinace, která podává nejlepší výsledky. Druhá část představuje samotný systém pro detekci řečové aktivity a ladění jeho parametrů. Nakonec jsou výsledky porovnány s dvěma dalšími systémy, založenými na odlišných principech. Pro testování a ladění byla použita ERT broadcast news databáze. Porovnání mezi systémy bylo pak provedeno na databázi z NIST06 Rich Test Evaluations.