<p>I develop and justify a measure of polarization based on pairwise differences between and within groups, which improves on previous approaches in its ability to account for multiple dimensions and an arbitrary number of partitions. I apply this measure to a roll-call based ideological mapping of U.S. legislators to show that while the contemporary Congress is polarized relative to mid-century levels, the current state is not historically unprecedented.</p><p>I then estimate the ideology of public opinion using survey respondent thermometer evaluations of political elites and population subgroups. I find that party affiliation is polarizing in this space, but that alternate partitions of the electorate, along racial, educational, and other socio-demographic lines, are de-polarized.</p><p>Finally, I estimate a two-dimensional latent space based on social identity trait co-occurrence. I show that positions in this space are predictive of survey respondent ideology, partisanship, and voting behavior. Further, I show that when conceived in this way, we do observe a polarization of the social space over the last half-century of American politics.</p> / Dissertation

Ultra wideband (UWB) has the potential for high data rates, ranging and positioning. A UWB communication system's design requires knowledge regarding the channel. This thesis investigates the effect that different antenna orientations have on the wireless channel; in an indoor office environment. Channel reciprocity, path loss, body shadowing and spatial correlation are investigated for the frequency band 3.1 to 10.6 GHz. The measurements are performed in the frequency domain. UWB channels are shown to be highly reciprocal in all instances. Path loss versus distance was determined for line of sight (LOS) and non-line of sight (NLOS) scenarios. Body shadowing is measured for an average Caucasian male, and the root mean square (RMS) delay spread and received power loss plotted spatially. The spatial correlation is investigated using a two dimensional grid. A comparison between the horizontal and vertical polarization is made. / Graduate

Thesis (Ph. D.)--Ohio University, June, 1991. / Title from PDF t.p.

Thesis (Ph. D.)--Ohio University, March, 1993. / Title from PDF t.p.

Thesis (Ph. D.)--University of Chicago, Dept. of Astronomy and Astrophysics, June 1997. / Includes bibliographical references. Also available on the Internet.

Thesis (M.S. - Mining and Geological Engineering)--University of Arizona. / Includes bibliographical references (leaves 149-150).

Thesis (M.S.)--University of Delaware, 2008. / Principal faculty advisors: Daniel Chester, Dept. of Computer & Information Sciences; and Christiana Honsberg, Dept. of Electrical and Computer Engineering. Includes bibliographical references.

Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 207-213). Also available via the Internet

Thesis (Ph. D.)--Princeton University, 1932.

Thesis (Ph. D.)--University of Michigan, 1930. / "By A.L. Ferguson and G.M. Chen." From the Journal of physical chemistry, v. 36, no. 4, April, 1932.