Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references. Also available on the World Wide Web.

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The present study examined the relationship between early rearing experience and reproductive competence in captive adult giant pandas (Ailuropoda melanoleuca) and spectacled bears (Tremarctos ornatus). Life history information of 52 giant pandas and 34 spectacled bears were obtained from the International Studbook and by interviewing staff at institutions housing the subjects. The early rearing experience variables included duration of mother rearing, social access within 1-yr period following maternal separation, and birth origin. Correlation, Chi-square, and logistic regression analyses were used to analyze the data. Contrary to findings from studies with other animals, the results generally suggest that early rearing experience is not related to adult reproductive success in giant pandas and spectacled bears. Alternative explanation and limitation of the study were discussed; suggestions were made for future study.

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The scattering mechanisms responsible for Giant Magneto-Resistance (OMR) in magnetic multilayers are believed to be related to many aspects of the multilayer structure. X-ray scattering techniques provide a powerful method with which to study the bulk and interface morphology in these systems, and are therefore crucial in developing an understanding of the dominant factors influencing the magnitude of the OMR. Reflectivity measurements performed on a series of Co/Cu multilayers, sputter deposited onto etched silicon, reveal no variation in the interface roughness with etching voltage, the thickness of the individual layers also remaining constant. The observed decrease in the OMR cannot, therefore, be attributed to variations in spacer thickness or interfacial spin-independent scattering. Electron and X-ray Diffraction measurements suggest the reduction in GMR is due to a loss of antiferromagnetic coupling associated with a transformation of the texture from a randomly oriented to well oriented (111) polycrystalline texture, and subsequent reduction in the volume fraction of (100) oriented grains. Interfaces within Co/Cu are found to propagate with a high degree of conformality with increasing bilayer number, with an out-of-plane correlation length well in excess of 300Å. In contrast, the Co/Pt system exhibits a limiting out-of-plane correlation length of the order of 350Å arising from a columnar growth mode. X-ray Reflectivity and Diffraction measurements provide no structural interpretation for the 3-fold enhancement in the rate of increase of the saturation conductivity, as a function of spacer thickness, in Fe/Au (100) compared to Fe/Au (111), or why large oscillations in the GMR occur for the (100) orientation only. Such observations are, however, consistent with the existence of a channelling mechanism in Fe/Au (100). Grazing Incidence Fluorescence data indicates that Nb acts as a surfactant in Fe/Au (111) growth on sapphire. The influence of different defect types within multilayers has also been observed.

Master of Arts / Department of English / Daniel A. Hoyt / In this project, the opening chapters of a novel, a fifty-foot man falls to the ground in Athens, Ohio. He is pronounced dead at the scene. What begins as a bizarre happening in a small college town soon spirals into an event with global repercussions. The federal government puts together a team of four scientists: Peter, a biologist; Jonathon, an archaeologist; Alexa, a forensic scientist; and Carly, a geneticist. As politicians, the media, and religious figures latch on to the giant man, the scientists try to determine if the body is real. Meanwhile, a religious cult develops in Athens. The cult believes the body is the Judeo-Christian God because it resembles images of God in popular and classic works of art. The giant man came from up in the clouds, has a white, billowing beard, and is old. Cult members tie bandanas around their eyes because they believe humans are not meant to look upon the body of God. The novel is told from a third-person omniscient point of view and shows the far-reaching consequences of such a fantastic event in our contemporary world. The novel delves into the mind of the Pope, a mortician, a lawyer, clergymen, students at Ohio University, the mayor of Athens, and a four-year-old boy, among many others. These characters try to come to terms with what it means to have the unreal and the impossible happen in their ordinary lives.

This PhD thesis deals with research activity in organic electronics, an extremely exciting field offundamental science, which is complemented by relevant applications in every-day life: optoelectronics,solar energy conversion (photovoltaics), sensing and information technology, just to mentiona few. In this area, charge transfer/energy transfer processes, as well as light matter interaction,play a major role. Within this topic, this work focus on the theoretical study of the electronic structureand related charge transfer/spectroscopic properties of various molecular systems: Coronenecrystals, F4TCNQ/perylene co-crystals, polythiophenes, PCPDT/PCPDT-BT homo- and copolymerbased on thiophene, chemisorbed ferrocene on Si(111) substrate. Particular attention wasdevoted to the calculation of infrared (IR) and electronic spectra associated with the so-called “polaronsignature” in doped organic semiconductors. To assess the reliability and physical meaning of electronic quantities involved in the calculations(like the HOMO/LUMO gap, theoretical spectroscopic intensity and vibrational modes, pursuingthe comparison between neutral and charged systems) a number of different levels of the theoryhave been systematically varied from HF (Hartree-Fock) to “pure” DFT (Density Functional Theory),as well as hybrid B3LYP (Becke 3-Parameter (Exchange), Lee, Yang and Parr 1,2) and longrange corrected Coulomb-Attenuating Method (CAM-B3LYP) functionals. In the attempt to untanglethe physics underlying the polaron formation in charged molecular systems (as evidenced by theoccurrence of giant intensity bands found in IR spectra), the mapping of the vibrational mode betweenneutral and charged systems has been calculated. A major achievement in this work is thatthe vibrational (giant) mode associated with the “polaron” emerges as a new mode (peculiar of thecharged state) not related to any mode existing in the neutral system.