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• 101. [Article] Investigating Variation in Coral Reef Morphology with Photomosaics and Analysis of Percent Cover

  42 pages

  Citation × Citation Citation Abstract Copy Title: Investigating Variation in Coral Reef Morphology with Photomosaics and Analysis of Percent Cover Author: Culman, Justin Year: 2017 42 pages Title: Investigating Variation in Coral Reef Morphology with Photomosaics and Analysis of Percent Cover Author: Culman, Justin Year: 2017 42 pages Close

• 102. [Article] Investigation of an Uncharacterized Aeromonas Protein involved in Host Colonization

  1 page poster

  Citation × Citation Citation Abstract Copy Title: Investigation of an Uncharacterized Aeromonas Protein involved in Host Colonization Author: Ngo, Julia Year: 2017 1 page poster Title: Investigation of an Uncharacterized Aeromonas Protein involved in Host Colonization Author: Ngo, Julia Year: 2017 1 page poster Close

• 103. [Article] Climate Change and Peruvian Potato Farming: Traditional Knowledge in Climate Change Adaptation

  58 pages. A thesis presented to the Department of Environmental Studies and the Clark Honors College of the University of Oregon in partial fulfillment of the requirements for degree of Bachelor of Arts, ...

  Citation × Citation Citation Abstract Copy Title: Climate Change and Peruvian Potato Farming: Traditional Knowledge in Climate Change Adaptation Author: Giamberso, Lisa Rose Year: 2014 58 pages. A thesis presented to the Department of Environmental Studies and the Clark Honors College of the University of Oregon in partial fulfillment of the requirements for degree of Bachelor of Arts, Spring 2014. Title: Climate Change and Peruvian Potato Farming: Traditional Knowledge in Climate Change Adaptation Author: Giamberso, Lisa Rose Year: 2014 58 pages. A thesis presented to the Department of Environmental Studies and the Clark Honors College of the University of Oregon in partial fulfillment of the requirements for degree of Bachelor of Arts, Spring 2014. Close

• 104. [Article] Understanding Morphology Dependent Luminescence in Nanostructured Silver Films: Experiments, Modeling, and Numerical Simulations

  In this dissertation we use theoretical, computational, and experimental techniques to investigate the influence of structure and environment on the optical properties of nanoscale silver films. We have ...

  Citation × Citation Citation Abstract Copy Title: Understanding Morphology Dependent Luminescence in Nanostructured Silver Films: Experiments, Modeling, and Numerical Simulations Author: Davis, Lawrence Year: 2012, 2013 In this dissertation we use theoretical, computational, and experimental techniques to investigate the influence of structure and environment on the optical properties of nanoscale silver films. We have focused our study on two types of nanoscale films, those being smooth films with nanoscale thickness and chemically deposited nanostructured films. We examine the excitation of surface plasmon resonances in both types of films and study the sensitivity of these resonances to the film structure and the properties of the surrounding dielectric environment. Using smooth films we discuss the development of methods for measurement of fluid temperature and thermo-optic coefficients based on the sensitivity of surface plasmon excitations to film thickness and permittivity of the adjacent dielectric. We then examine the role of film microstructure in determining the photoluminescent properties of chemically deposited rough silver films. We develop a physical model to describe the chemical deposition process used to fabricate the films. We also develop a Monte Carlo algorithm to simulate the film deposition and test the model. We validate the model and simulations by comparing simulated and measured structural properties of the films across a wide range of film morphologies. We examine the dependence of the ensemble photoluminescence and surface enhanced Raman scattering on the film structure and excitation power. Our experimental and computational study of film growth and morphology allows us to understand how these light emission signals are influenced by the film microstructure. We also discuss how these signals and their sensitivity to the film microstructure and dielectric environment might be exploited for biochemical sensing applications. Title: Understanding Morphology Dependent Luminescence in Nanostructured Silver Films: Experiments, Modeling, and Numerical Simulations Author: Davis, Lawrence Year: 2012, 2013 In this dissertation we use theoretical, computational, and experimental techniques to investigate the influence of structure and environment on the optical properties of nanoscale silver films. We have focused our study on two types of nanoscale films, those being smooth films with nanoscale thickness and chemically deposited nanostructured films. We examine the excitation of surface plasmon resonances in both types of films and study the sensitivity of these resonances to the film structure and the properties of the surrounding dielectric environment. Using smooth films we discuss the development of methods for measurement of fluid temperature and thermo-optic coefficients based on the sensitivity of surface plasmon excitations to film thickness and permittivity of the adjacent dielectric. We then examine the role of film microstructure in determining the photoluminescent properties of chemically deposited rough silver films. We develop a physical model to describe the chemical deposition process used to fabricate the films. We also develop a Monte Carlo algorithm to simulate the film deposition and test the model. We validate the model and simulations by comparing simulated and measured structural properties of the films across a wide range of film morphologies. We examine the dependence of the ensemble photoluminescence and surface enhanced Raman scattering on the film structure and excitation power. Our experimental and computational study of film growth and morphology allows us to understand how these light emission signals are influenced by the film microstructure. We also discuss how these signals and their sensitivity to the film microstructure and dielectric environment might be exploited for biochemical sensing applications. Close

• 105. [Article] Executive Summary: Preparing for Climate Change in the Klamath Basin of Southern Oregon and Northern California

  3 p.

  Citation × Citation Citation Abstract Copy Title: Executive Summary: Preparing for Climate Change in the Klamath Basin of Southern Oregon and Northern California Author: Climate Leadership Initiative, Barr, Brian R., Koopman, Marni E., Williams, Cindy Deacon, Doppelt, Bob, Hamilton, Roger, Vynne, Stacy, 1979- Year: 2010 3 p. Title: Executive Summary: Preparing for Climate Change in the Klamath Basin of Southern Oregon and Northern California Author: Climate Leadership Initiative, Barr, Brian R., Koopman, Marni E., Williams, Cindy Deacon, Doppelt, Bob, Hamilton, Roger, Vynne, Stacy, 1979- Year: 2010 3 p. Close

• 106. [Article] Preparing for Climate Change in the Klamath Basin

  iii, 36 p.

  Citation × Citation Citation Abstract Copy Title: Preparing for Climate Change in the Klamath Basin Author: Climate Leadership Initiative, Barr, Brian R., Koopman, Marni E., Williams, Cindy Deacon, Vynne, Stacy, 1979-, Hamilton, Roger, Doppelt, Bob, National Center for Conservation Science and Policy Year: 2010 iii, 36 p. Title: Preparing for Climate Change in the Klamath Basin Author: Climate Leadership Initiative, Barr, Brian R., Koopman, Marni E., Williams, Cindy Deacon, Vynne, Stacy, 1979-, Hamilton, Roger, Doppelt, Bob, National Center for Conservation Science and Policy Year: 2010 iii, 36 p. Close

• 107. [Article] Hidden Rotational Symmetries in Magnetic Domains

  Magnetic films have gained great attention for decades because of their broad industrial application. Their modern functionality more and more relies on their domain structure. Magnetic films usually form ...

  Citation × Citation Citation Abstract Copy Title: Hidden Rotational Symmetries in Magnetic Domains Author: Su, Run Year: 2013 Magnetic films have gained great attention for decades because of their broad industrial application. Their modern functionality more and more relies on their domain structure. Magnetic films usually form complex domain patterns with unique structures at different length scales due to the competition between short range attractive and long range repulsive interactions. The ensemble of domains is topologically disordered, although each of them possesses orientational spin order. Since simplifying complexity is the key step to understand and transform nature, finding new orders from the ostensible disordered structures would be a fascinating topic. Scattering techniques are well-known powerful tools to detect orders. Coherent soft xray magnetic resonant scattering becomes accessible with the development of synchrotron radiation facilities. We applied the technique to study the domain structure of CoPd/MnIr multilayer films with perpendicular magnetic anisotropy. By tuning incident photon energy to Co 2p&rarr3d transition edge we collected small angle magnetic scattering patterns by a charged coupled device in transmission geometry. Each pattern is an unique fingerprint of the corresponding illuminated domain structure. The patterns were analyzed by an angular correlation method. A variety of striking rotational orders were discovered. Their evolution with applied fields was investigated. The sustainabilities of the orders under the room temperature, exchange biased (EB) state, and non-EB state were compared, which suggests that certain orders can be well manipulated under the EB condition. By simulating magnetic resonant scattering from domain patterns obtained by a direct imaging method, we probed the range of emerging orders and finite size effect. Our study provides a novel approach to characterizing magnetic films and potentially can be extended to any system with a complex microstructure. Title: Hidden Rotational Symmetries in Magnetic Domains Author: Su, Run Year: 2013 Magnetic films have gained great attention for decades because of their broad industrial application. Their modern functionality more and more relies on their domain structure. Magnetic films usually form complex domain patterns with unique structures at different length scales due to the competition between short range attractive and long range repulsive interactions. The ensemble of domains is topologically disordered, although each of them possesses orientational spin order. Since simplifying complexity is the key step to understand and transform nature, finding new orders from the ostensible disordered structures would be a fascinating topic. Scattering techniques are well-known powerful tools to detect orders. Coherent soft xray magnetic resonant scattering becomes accessible with the development of synchrotron radiation facilities. We applied the technique to study the domain structure of CoPd/MnIr multilayer films with perpendicular magnetic anisotropy. By tuning incident photon energy to Co 2p&rarr3d transition edge we collected small angle magnetic scattering patterns by a charged coupled device in transmission geometry. Each pattern is an unique fingerprint of the corresponding illuminated domain structure. The patterns were analyzed by an angular correlation method. A variety of striking rotational orders were discovered. Their evolution with applied fields was investigated. The sustainabilities of the orders under the room temperature, exchange biased (EB) state, and non-EB state were compared, which suggests that certain orders can be well manipulated under the EB condition. By simulating magnetic resonant scattering from domain patterns obtained by a direct imaging method, we probed the range of emerging orders and finite size effect. Our study provides a novel approach to characterizing magnetic films and potentially can be extended to any system with a complex microstructure. Close

• 108. [Article] Elucidating the Mechanism of Dinitrogen Reduction to Ammonia: Novel Intermediates in the Protonation of Fe(DMeOPrPE)2N2

  The reduction of dinitrogen (N2) to ammonia (NH3) will continue to play a vital role in society as the population of the world grows and maintains its dependence on artificial fertilizers. This energy-intensive ...

  Citation × Citation Citation Abstract Copy Title: Elucidating the Mechanism of Dinitrogen Reduction to Ammonia: Novel Intermediates in the Protonation of Fe(DMeOPrPE)2N2 Author: Balesdent, Chantal Year: 2013, 2014 The reduction of dinitrogen (N2) to ammonia (NH3) will continue to play a vital role in society as the population of the world grows and maintains its dependence on artificial fertilizers. This energy-intensive transformation is achieved industrially by the Haber-Bosch process and naturally via nitrogenase enzymes. Recent synthetic systems attempt to produce NH3 artificially but with lower energy costs than Haber-Bosch by modeling their designs after nitrogenase. This dissertation describes the progress made in one iron-phosphine system, the water-soluble Fe(DMeOPrPE)2N2, capable of producing NH3 at room temperature and pressure. Chapter I describes the history of the coordination chemistry of N2 to a variety of metals, with a focus on iron complexes. In addition to exploring the range of coordination geometries and supporting ligands of such complexes, the application of N2 coordination complexes towards NH3 formation is analyzed. Chapter II discusses the various methods for quantifying yields of ammonia. Along with a historical perspective on the popular indophenol method, the challenges and best conditions for measuring NH3 in the Fe-DMeOPrPE system are defined. Chapter III explores a series of trans-hydrido intermediates along a potential protonation pathway of Fe(DMeOPrPE)2N2. The complete series of reduced dinitrogen ligands (N2, N2H2, N2H4, and NH3) on the Fe(DMeOPrPE)2H+ scaffold is described. Chapter IV highlights the discovery and characterization of a unique bridged Fe(I) dimer, observed during the protonation of Fe(DMeOPrPE)2N2 as a dark purple intermediate. Chapter V describes the electrochemistry of certain intermediates in the Fe-DMeOPrPE system. This insight should open new avenues for future investigations. By altering the electronics of the system, more NH3 may eventually be produced. Chapter VI provides a summary of this work. This dissertation includes previously published and unpublished co-authored material. Title: Elucidating the Mechanism of Dinitrogen Reduction to Ammonia: Novel Intermediates in the Protonation of Fe(DMeOPrPE)2N2 Author: Balesdent, Chantal Year: 2013, 2014 The reduction of dinitrogen (N2) to ammonia (NH3) will continue to play a vital role in society as the population of the world grows and maintains its dependence on artificial fertilizers. This energy-intensive transformation is achieved industrially by the Haber-Bosch process and naturally via nitrogenase enzymes. Recent synthetic systems attempt to produce NH3 artificially but with lower energy costs than Haber-Bosch by modeling their designs after nitrogenase. This dissertation describes the progress made in one iron-phosphine system, the water-soluble Fe(DMeOPrPE)2N2, capable of producing NH3 at room temperature and pressure. Chapter I describes the history of the coordination chemistry of N2 to a variety of metals, with a focus on iron complexes. In addition to exploring the range of coordination geometries and supporting ligands of such complexes, the application of N2 coordination complexes towards NH3 formation is analyzed. Chapter II discusses the various methods for quantifying yields of ammonia. Along with a historical perspective on the popular indophenol method, the challenges and best conditions for measuring NH3 in the Fe-DMeOPrPE system are defined. Chapter III explores a series of trans-hydrido intermediates along a potential protonation pathway of Fe(DMeOPrPE)2N2. The complete series of reduced dinitrogen ligands (N2, N2H2, N2H4, and NH3) on the Fe(DMeOPrPE)2H+ scaffold is described. Chapter IV highlights the discovery and characterization of a unique bridged Fe(I) dimer, observed during the protonation of Fe(DMeOPrPE)2N2 as a dark purple intermediate. Chapter V describes the electrochemistry of certain intermediates in the Fe-DMeOPrPE system. This insight should open new avenues for future investigations. By altering the electronics of the system, more NH3 may eventually be produced. Chapter VI provides a summary of this work. This dissertation includes previously published and unpublished co-authored material. Close

• 109. [Article] Solvable Particle Models Related to the Beta-Ensemble

  For beta > 0, the beta-ensemble corresponds to the joint probability density on the real line proportional to prod_{n > m}^N abs{x_n - x_m}^beta prod_{n = 1}^N w(x_n) where w is the weight of the system. ...

  Citation × Citation Citation Abstract Copy Title: Solvable Particle Models Related to the Beta-Ensemble Author: Shum, Christopher Year: 2013 For beta > 0, the beta-ensemble corresponds to the joint probability density on the real line proportional to prod_{n > m}^N abs{x_n - x_m}^beta prod_{n = 1}^N w(x_n) where w is the weight of the system. It has the application of being the Boltzmann factor for the configuration of N charge-one particles interacting logarithmically on an infinite wire inside an external field Q = -log w at inverse temperature beta. Similarly, the circular beta-ensemble has joint probability density proportional to prod_{n > m}^N abs{e^{itheta_n} - e^{itheta_m}}^beta prod_{n = 1}^N w(x_n) quad for theta_n in [- pi, pi) and can be interpreted as N charge-one particles on the unit circle interacting logarithmically with no external field. When beta = 1, 2, and 4, both ensembles are said to be solvable in that their correlation functions can be expressed in a form which allows for asymptotic calculations. It is not known, however, whether the general beta-ensemble is solvable. We present four families of particle models which are solvable point processes related to the beta-ensemble. Two of the examples interpolate between the circular beta-ensembles for beta = 1, 2, and 4. These give alternate ways of connecting the classical beta-ensembles besides simply changing the values of beta. The other two examples are "mirrored" particle models, where each particle has a paired particle reflected about some point or axis of symmetry. Title: Solvable Particle Models Related to the Beta-Ensemble Author: Shum, Christopher Year: 2013 For beta > 0, the beta-ensemble corresponds to the joint probability density on the real line proportional to prod_{n > m}^N abs{x_n - x_m}^beta prod_{n = 1}^N w(x_n) where w is the weight of the system. It has the application of being the Boltzmann factor for the configuration of N charge-one particles interacting logarithmically on an infinite wire inside an external field Q = -log w at inverse temperature beta. Similarly, the circular beta-ensemble has joint probability density proportional to prod_{n > m}^N abs{e^{itheta_n} - e^{itheta_m}}^beta prod_{n = 1}^N w(x_n) quad for theta_n in [- pi, pi) and can be interpreted as N charge-one particles on the unit circle interacting logarithmically with no external field. When beta = 1, 2, and 4, both ensembles are said to be solvable in that their correlation functions can be expressed in a form which allows for asymptotic calculations. It is not known, however, whether the general beta-ensemble is solvable. We present four families of particle models which are solvable point processes related to the beta-ensemble. Two of the examples interpolate between the circular beta-ensembles for beta = 1, 2, and 4. These give alternate ways of connecting the classical beta-ensembles besides simply changing the values of beta. The other two examples are "mirrored" particle models, where each particle has a paired particle reflected about some point or axis of symmetry. Close

• 110. [Article] Competing orders in s-wave and p-wave superconductors

  xiii, 110 p. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.

  Citation × Citation Citation Abstract Copy Title: Competing orders in s-wave and p-wave superconductors Author: Li, Qi, 1976- Year: 2009, 2008 xiii, 110 p. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. Title: Competing orders in s-wave and p-wave superconductors Author: Li, Qi, 1976- Year: 2009, 2008 xiii, 110 p. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. Close