Abstract¡G This thesis studies the memory effect due to bias perturbation on digital predistortion technique, and employs multi-tone continuous wave signal and digital modulation signals with different bandwidth to discuss the performance of digital predistortion technique. Memory effect makes a great impact on the digital predistortion technique, and bias perturbation is one of the major causes. Lowering the bias perturbation can improve the effectiveness of digital predistortion technique. Another focus of this thesis is to design a Class E power amplifier in 0.18 £gm CMOS process. The power amplifier uses cascode structure to alleviate the breakdown voltage problem and employs power combining technique to achieve impedance transformation on chip for the purpose of increasing the output power and efficiency.

Business School, Diss.--Copenhagen, 2006.

Thesis (Ph.D.)--Murdoch University, 2008. / Thesis submitted to the Faculty of Law and Business. Includes bibliographical references (p. 352-358)

Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (p. 81-86).

Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (leaves 59-63).

Thesis (Ph. D.)--Ohio State University, 2003. / Title from first page of PDF file. Document formatted into pages; contains xii, 107 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Douglas B. Downey, Dept. of Chemistry. Includes bibliographical references (p. 92-98).

No description available.

A Thesis submitted to The University of Arizona College of Medicine - Phoenix in partial fulfillment of the requirements for the Degree of Doctor of Medicine. / Purpose: compare the Southwestern Indigenous Cognitive Assessment (SWICA), a novel tool for screening AI older adults in Arizona, with The Montreal Cognitive Assessment (MoCA), a commonly used memory screening tool, for comparison of cultural bias. Methods: Cultural bias was assessed by retrospectively comparing coded participant responses to 16 questions about their cultural context. Intrasample variation on MoCA and SWICA tests was controlled by using the participants as their own controls. Data were analyzed using a multiple regression general linear model on SPSS software. Results: Scores on the SWICA test were independently associated with English use in the home (Beta = .396, p = .026), years of education (Beta = 335, p = .027), and ease of learning (Beta = .361, p = .029), but not age (Beta = .366, p = .054). Scores on the MoCA test were independently associated with age (Beta = ‐.491, p = .001), English use in the home (Beta = ‐.320, p = .039) , and years of education (Beta = ‐.284. p = .030), but not ease of learning (Beta = ‐.267, p = .067). Conclusions: Scores were similar on both tests (t=3.934, p=.001), and were independently associated with English use in the home and years of education. SWICA was uniquely associated with ease of learning and MoCA was uniquely associated with age. This preliminary comparison demonstrates the usefulness of SWICA, and validation of this tool is recommended.

På samma sätt som saker och ting kategoriseras, grupperar sig människor till ”vi” och ”dem”. Tidigare forskning har visat att både en gärningsman och ett vittnes etniska ursprung har avgörande betydelse för hur en gärningsman bedöms vid ett brott. Denna studie undersökte om deltagarnas och gärningsmannens etniska ursprung inverkade på attityden till att vittna vid ett brott. Studien var en kvasiexperimentell enkätundersökning där sammanlagt 166 skolelever i årskurs 9, varav 81 av utländskt ursprung fick besvara påståenden utifrån en fiktiv berättelse då gärningsmannens etnicitet manipulerades. Ingen skillnad kunde påvisas mellan de olika etniska gruppernas attityd till att vittna beroende på gärningsmannens etnicitet. Dock påvisades en skillnad mellan de olika etniska gruppernas attityd till att vittna oberoende gärningsmannens etnicitet. Således gav hypoteserna inget stöd. Resultatet kan bero på att skoleleverna i studien kom från heterogena skolor, och på så vis kunnat utveckla en social samhörighet med varandra.

The field of molecular magnetism has expanded rapidly since the discovery of single molecule magnets (SMMs) in the 1990’s and has witnessed extraordinary advances in the last several decades. One of the current trends in molecular magnetic research is to incorporate metal ions that have pronounced single-ion anisotropy in an effort to improve magnetic exchange interactions. The 4d and 5d transition metal ions have large spin-orbit coupling parameters which contribute to the orbital angular momentum effects that lead to anisotropic behavior. The work herein describes efforts to synthesize and characterize new cyanide-bridged molecular materials incorporating 4d and 5d transition metal ions, specifically the [Os(CN)_(6)]^(3-), [Mo(CN)_(6)]^(3-) and [W(CN)_(8)]^(3-) ions. The 5d hexacyanometallate [Os(CN)_(6)]^(3-) was incorporated into a trinuclear cyanide bridged molecule and the [Fe(CN)_(6)]^(3-) analog was prepared as a reference compound for assessing the effect of the 5d versus 3d metal ion on the magnetic properties. Both molecules exhibit SMM bistability with a pronounced increase (~90 %) in the blocking temperature (TB) of the OsIII analogue. In addition to typical SMM behavior, both compounds exhibit exchange-biased SMM behavior, a shift in the quantum tunneling of the magnetization (QTM) from zero field. This exchange-bias can be turned “on” or “off” depending on the presence of interstitial methanol molecules. New trigonal bipyramidal (TBP) molecules incorporating the rarely studies hexacyanomolybdate(III) ion are presented in chapter III of this dissertation. The molecules of general formula [M(tmphen)_(2)]_(3)[Mo(CN)_(6)]_(2) (M = V^(II), Mn^(II) and Fe^(II); tmphen = 3,4,7,8-tetramethyl-1,10-phenanthroline), represent additions to a large homologous family of TBP molecules reported by the Dunbar group over the years. The [Mo(CN)_(6)]^(3-) ion was prepared in situ by loss of one cyanide ligand from [Mo(CN)_(7)]^(4-). Of particular interest among the compounds reported is the V_(3)Mo_(2) analog which exhibits extraordinarily strong antiferromagnetic coupling (estimated J = -134 cm^(-1). The observed exchange coupling parameter is more than twice the current record for the antiferromagnetic coupling parameter for a cyanide-bridged magnetic molecule. Another set of results were obtained using the octacyanometallate anion [WV(CN)_(8)]^(3-) as a building block for the synthesis and magnetic studies of a family of new cyanide-bridged magnetic materials. The compounds exhibit several different structural motifs including three 0-D molecular compounds (two pentanuclear molecules and a linear trinuclear molecule) and a 1-D chain, findings that illustrate the structural versatility of the octacyanotungstate(V) ions. The TBP molecule, [Mn(tmphen)_(2)]_(3)[W(CN)_(8)]_(2), exhibits evidence for an out-of-phase signal when subjected to ac measurements in zero applied field. The 1-D chain also reveals evidence for the beginning of an out-of-phase signal under zero applied field which hints at single chain magnet behavior.