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Three Research Essays On Human Behaviors In Social Media, Jiao Wu
Three Research Essays On Human Behaviors In Social Media, Jiao Wu
Theses and Dissertations
Social Media (SM) has grown to be one of the most popular Internet technologies for individual users and has fostered a global community. For instance, recent statistics reveal that monthly active users of Facebook are almost 1.5 billion by Mar 2015. At the same time, 20% of internet users in the US are expected to have Twitter accounts. This figure has grown from 15.2% in 2012, and is expected to rise to 24.2% by 2018 (Twitter 2015).
People like spending their time on SM to track the latest news, seek knowledge, update personal status, and connect with friends. It is …
Gravitational-Wave Science With The Laser Interferometer Gravitational-Wave Observatory, Madeline Wade
Gravitational-Wave Science With The Laser Interferometer Gravitational-Wave Observatory, Madeline Wade
Theses and Dissertations
Gravitational-waves, as predicted by Einstein’s theory of general relativity, are oscillations of spacetime caused by the motion of masses. Although not yet directly detected, there is strong evidence for the existence of gravitational-waves. Detectable gravitational waves will come from dramatic astrophysical events, such as supernova explosions and collisions of black holes. The Laser Interferometer Gravitational-wave Observatory (LIGO) is a network of detectors designed to make the first direct detection of gravitational waves. The upgraded version of LIGO, Advanced LIGO (aLIGO), will offer a dramatic improvement in sensitivity that will virtually guarantee detections.
Gravitational-wave detections will not only illuminate mysterious astrophysical …
Topics In Broadband Gravitational-Wave Astronomy, Sydney Joanne Chamberlin
Topics In Broadband Gravitational-Wave Astronomy, Sydney Joanne Chamberlin
Theses and Dissertations
The direct detection of gravitational waves promises to open a new observational window onto the universe, and a number of large scale efforts are underway worldwide to make such a detection a reality. In this work, we attack some of the current problems in gravitational-wave detection over a wide range of frequencies.
In the first part of this work, low frequency gravitational-wave detection is considered using pulsar timing arrays (PTAs). PTAs are a promising tool for probing the universe through gravitational radiation. Supermassive black hole binaries (SMBHBs), cosmic strings, relic gravitational waves from inflation, and first order phase transitions in …