Now showing items 15940-15959 of 39117

    • Gabriel Faure's "La Bonne Chanson", Opus 61 and "La Chanson d'Eve", Opus 95: Musical diversity versus thematic unity.

      Marsh, Stephanie.; Day, Larry (The University of Arizona., 1995)
      This document is a study of the musical and literary unity Gabriel Faure applied to the La Bonne chanson, Opus 61 and La Chanson d'Eve, Opus 95. This paper further is an in depth examination of the two versions of La Bonne chanson and how Faure uses the colorful string texture to specifically illustrate thematic material as well as textual themes. The original string quintet version will be analyzed in the voicing of string accompaniment illustrating just how Faure eliminates these unifying themes in each string color juxtaposed with thematic material in the piano accompaniment as well. In the second version, which is piano/vocal, these musical themes are far less distinct to the listener due to the complex thematic texture of the accompaniment.
    • Gaetano Donizetti, Saverio Mercadante, and the Evolution and Development of the Verdi Baritone

      Roe, Charles; Krueger, Nathan Elliott; Dauphinais, Kristin; Hirst, Grayson; Roe, Charles (The University of Arizona., 2011)
      The leading baritone roles in the operas of Giuseppe Verdi, known as Verdi baritone roles, presented new challenges for the singers who first interpreted these roles. Their demanding tessitura and complex characterizations tested the skill of a generation of singers who began their careers singing the roles of Gioacchino Rossini, Gaetano Donizetti, Saverio Mercadante, Vincenzo Bellini and Giovanni Pacini in the lighter, bel canto style. The purpose of this study is to examine the careers of singers active in Italy between 1830 and 1845 and to provide insight as to which roles written before the premiere of Verdi's Nabucco contained similar vocal and characterization demands. Through examination of available Italian opera house annals, ten singers were identified by the author as precursors to the Verdi baritone, and are categorized into three groups: the pre-Verdi baritones, the transitional baritones and the established Verdi baritones. A brief biography of each singer is included, as well as an appendix for each singer that includes roles performed, dates and locations of the performances. The title role in Donizetti's Torquato Tasso and the role of Manfredo in Mercadante's Il giuramento were determined to be the roles most similar to Verdi's Nabucco. Each role is analyzed in terms of characterization and tessitura demands, and is compared using tessitura charts that account for the frequency and duration of individual pitches. The roles are divided into sections, and each section is designated by its overall range, primary tessitura, secondary tessitura, and weighted pitches. These designations provide quantifiable evidence that each role presents similar challenges for the baritone.

      Chaille, John Sheridan. (The University of Arizona., 1983)

      Oksasoglu, Ali, 1960- (The University of Arizona., 1987)
    • Gain-bandwidth effects on the resonator filter

      Huelsman, Lawrence P.; Merrill, Douglas Richard, 1962- (The University of Arizona., 1992)
      The purpose of this study is to analyze the resonator filter, and to determine the effects of gain-bandwidth on the dominant complex conjugate pole pair. Optimization methods are then used as a design tool to determine the compensation required to shift the dominant pole pair back to their original design locations. New design values resulting from the compensation are used for the final circuit. Simulations are run to verify that the new design produces the desired magnitude response. The roots of the characteristic equation are checked to verify the proper location of the dominant pole pair. A comparison is made between the third order approximation and the fifth order one.

      Lake, Allison Katherine (The University of Arizona., 2009-05)
    • The galactic center stellar population in the near-infrared.

      Haller, Joseph William.; Rieke, Marcia J.; Black, John H.; Kennicutt, Robert C.; Olszewski, Edward W. (The University of Arizona., 1992)
      Near infrared photometry is presented for 659 stars within 2.5' of the Galactic Center from three epochs of 2.2μm and one epoch of 1.6μm observations. The data were taken with a Rockwell 64 x 64 HgCdTe IR array at the Steward Observatory 1.6m telescope and are complete to m(K) = 11.0. Additional photometry at 3.4μm for a subsample of 258 stars taken with a 58 x 62 InSb array at CTIO is also included. The sample has an average (H-K)(OBS), which is consistent with a late-type population with (H-K)₀ = 0.3 and A(V) = 31.8 mag, and luminosities several magnitudes brighter than the Baade's Window AGB. A variability analysis shows 59 stars are long period variable candidates at the 3σ level. These stars show correlations in (H-K)₀ vs. (K-L)₀ and (K-L)₀ vs. Δm(K) consistent with Mira variables on the AGB. The LPV luminosities are consistent with a population fewx10⁸ yr old which is older than the Galactic Center central cluster stars and younger than bulge stars in Baade's Window, implying the Galactic Center has repeating episodes of star formation. Observations of the CO(v = 2 ← 0) 2.3μm absorption feature taken at the CTIO 4m with the IR Spectrometer Array of the unresolved stellar emission at 9 positions within 30'' of Sgr A* are presented. It is shown that the CO band strength is highly correlated with r(SgrA*) for radii less than R(CO) ≈ 8.5'' (0.28 pc). The Galactic rotation curve has a radial gradient of -16 km s⁻¹ arcsec⁻¹ inside r(SgrA*) ≈ 10'' (0.33 pc) where it reaches a minimum. Estimates of the enclosed mass vs. radius show there is (1.7 ± 0.3) x 10⁶ M(⊙) inside r(SgrA*) = 5.2'' (0.17 pc) with a mass-to-light ratio on the order of 10. Assuming the CO absorption samples stellar emission at each projected radius, these results are strong evidence for a massive black hole at the Galactic Center.

      Thompson, Laird Alan, 1947- (The University of Arizona., 1974)
    • Galaxy Clusters in the Dark Energy Survey

      Rozo, Eduardo; McClintock, Thomas; Behroozi, Peter; Besla, Gurtina; Cheu, Elliott; Marrone, Dan; Pinto, Phil (The University of Arizona., 2018)
      Galaxy clusters are massive dark matter halos, with masses as high as a few times 10^15 M⊙, each hosting tens to hundreds of galaxies. In its first year of data, the Dark Energy Survey has detected more than 100,000 clusters and groups. The upcoming Large Synoptic Survey Telescope is poised to discover over an order of magnitude more. Both of these surveys are well positioned to use galaxy clusters to make leading constraints on cosmological parameters. Two critical components are necessary for a cluster cosmology analysis: measurements of cluster masses, and models of the abundance of dark matter halos. In this thesis I detail two studies on these topics. First, using data from the Dark Energy Survey Year 1 data release, we constrained the masses of redMaPPer clusters using weak lensing. The normalization of the mean mass–richness scaling relation was measured with 5 percent accuracy, the most accurate measurement made to date. Second, as part of the Aemulus Project, using a suite of 40 dark matter only N-body simulations in a multi-dimensional cosmological parameter space, we developed an emulator model that interpolates between these simulations to predict the halo mass function. The mass function emulator achieves better than 1 percent accuracy at mass scales necessary to perform cluster cosmology by using Gaussian Processes to interpolate the results from simulations. This fulfills the stringent requirements of the Large Synoptic Survey Telescope. Finally, I outline ongoing efforts to improve lensing models of galaxy clusters that will enable numerous avenues for performing abundance analyses.

      TRIVINOS-ARANEDA, SEGUNDO GILBERTO. (The University of Arizona., 1985)
      Esta disertación estudia la Primera Serie de Episodios Nacionales con el propósito de refutar la tesis sobre el carácter esencialmente épico de este grupo novelístico, particularmente la afirmación según la cual determinados Episodios tienen todas las características propias de la epopeya. El estudio en el nivel de la historia y del discurso de la serie muestra que Galdós no escribió relatos con las características de la epopeya sino novelas singularizadas por el triunfo de los protagonistas y los narradores sobre la fascinación ejercida por la "épica militar" y sobre el discurso que la exalta. El desengaño de la identificación de la guerra con la fiesta (Capítulo 2); la metamorfosis de los combatientes en monstruos o demonios; la tensión voces del individuo-voces de la familia-voces de la humanidad; los motivos del naufragio y del niño abandonado; el sistema analógico que equipara los horrores de la guerra con los horrores del infierno o de la pesadilla (Capítulo 4); el contraste entre el discurso militarista y el discurso pacifista o el predominio de las historias de hombres anónimos y célebres que sueñan con la paz y no con la guerra (Capítulo 5) son las principales constantes que muestran la distancia irreductible entre el Episodio y la Epopeya. Es posible hablar de una épica galdosiana únicamente en el caso de comprenderse por tal la escritura del martirio de los hombres y naciones en la época de la "guerra nacional" sobre la "guerra caballeresca" (Capítulo 6). Este estudio no evidencia sólo el rechazo del Episodio a la represión ejercida en la Epopeya contra las voces amorosas, pacifistas o antiheroicas. Reducir la Primera Serie a su dimensión liberadora sería, sin duda, mistificador, pues ella tiene también un reverso represivo. El análisis de las ceremonias de expulsión o censura de los deseos guerreros, libertinos, románticos o revolucionarios (Capítulo 7) permite concluir que las novelas de guerra escritas por Galdós están regidas por la característica tal vez más distintiva de la novela realista del siglo XIX: el miedo a los deseos socialmente perturbadores o peligrosos.
    • Galois groups and Greenberg's conjecture

      McCallum, William G.; Marshall, David Clark (The University of Arizona., 2000)
      We consider the structure of a certain infinite Galois group over Q(ζp) the cyclotomic field of p-th roots of unity. Namely, we consider the Galois group of the maximal p-ramified pro- p-extension. Very little is known about this group. It has a free pro-p presentation in terms of g generators and s relations where g and s may be explicitly computed in terms of the p-rank of the class group of Q(ζp). The structure of the relations in the Galois group are shown to be very closely related to the relations in a certain Iwasawa module. The main result of this dissertation shows this Iwasawa module to be torsion free for a large class of cyclotomic fields. The result is equivalent to verifying Greenberg's pseudo-null conjecture for the given class of fields. As one consequence, we provide a large class of examples of cyclotomic fields which do not admit free pro-p-extensions of maximal rank.
    • Galsworthy and the theme of the unhappy marriage

      Bingham, Fern Catherine, 1913- (The University of Arizona., 1937)
    • Galsworthy's "Spire of Meaning"

      Becker, Barbara E., 1911- (The University of Arizona., 1933)
    • The galvanic skin response as an indicator of selective attention

      Shean, Glen (The University of Arizona., 1964)
    • The game "Planet"

      Meehan, Matthias Patrick, 1942- (The University of Arizona., 1973)
    • Game-Enhanced Simulation as an Approach to Experiential Learning in Business English

      Warner, Chantelle; Punyalert, Sansanee; Warner, Chantelle; Dupuy, Beatrice; Reinhardt, Jonathon (The University of Arizona., 2017)
      This dissertation aims to integrate various learning approaches, i.e., multiple literacies, experiential learning, game-enhanced learning, and global simulation, into an extracurricular module, in which it remodels traditional ways of teaching input, specifically, the lexical- and grammatical-only approaches of business English at a private university in Bangkok, Thailand. Informed by those approaches, a game-enhanced simulation was specifically designed as an experiential space for L2 learners to experience the dynamic and real business contexts of language use. A strategy-simulation video game, RollerCoaster Tycoon 3 Platinum (RCT3), was selected and used in the implementation of the pilot course. The game was embedded in a global simulation of two amusement park companies – where students worked in groups of five to form characters and socially interact with others. The global simulation involved learners in a sequence of genre-based (e.g., memoranda and business presentations) and technology-based tasks (e.g., using Gmail, Google Docs, and LinkedIn). Ten second-year students from five disciplines – Accounting, Logistics Engineering, Technology and Creative Business, Logistics Management, and Airline Business Management, participated in the study. Within this game-enhanced simulation, it turned out that each student simulated the role of a department head that was relevant to her or his discipline, for example, department heads of Financial Management, Technical Service Management, Customer Relationship Management, Legal and Operations Management, and Human Capital Management. The findings show that the learners' interactivity within the gameplay depicted the pedagogical affordances of RCT3 for a business English simulation, that is, exploratory interactivity, goal-orientedness in gameplay, goal-orientedness for roleplaying, and emergent narratives. The data present how this videogame features an interplay between two game perspectives – ludology and narratology. That is, ludic affordances in RCT3 could be activated in a narrative system: meaningful personal or emergent narrative by well-designed global simulation tasks. The simulations were established through students’ interpretation and creativity in gameplay and roleplay as related to their disciplines. Moreover, the game-enhanced simulation appeared to provide learners with an effective social context for promoting global English development and professional identity formation, which moved them beyond the learning practices of traditional coursebooks and classroom settings. Students of the study had opportunities to use professional Discourses related to their disciplines as ways to establish their desired identities within the simulated global workplace.
    • Game-Theoretic Contract Models for Equipment Leasing and Maintenance Service Outsourcing

      Liao, Haitao; Hamidi, Maryam; Son, Young-Jun; Fan, Neng; An, Lingling; Liao, Haitao (The University of Arizona., 2016)
      There is a major trend that manufacturers sell their services to customers instead of selling their products. These services can be provided through leasing, warranty, or maintenance outsourcing. In this dissertation, we have studied leasing and maintenance outsourcing services from different aspects of reliability-based maintenance, game-theoretic decision making, and inventory and supply chain management. We have studied how different interactions and relationships between the manufacturer and customer in service contracting affect the decisions they make and the profits they gain. The methods used to tackle the related decision-making processes are stochastic modeling, non-convex optimization, game-theoretical framework, and simulation. For equipment leasing, two non-cooperative game-theoretic models and a cooperative model have been developed to describe the relationships between the manufacturer (lessor) and customer (lessee). Through the lease contracts, the lessor decides on the maintenance policy of the leased equipment, and the lessee decides on the lease period and usage rate. In the non-cooperative simultaneous move scenario, the lessee and the lessor act simultaneously and independently to make their decisions. In the leader-follower non- cooperative contract, the lessor is the leader who specifies the maintenance policy first, and the lessee, as the follower, decides on the lease period and usage rate accordingly. We have next determined the total maximum profit and shown that the Nash and Stackelberg equilibria are different from the total maximum solution. As a result, the players can increase their total profit by cooperation. We have implemented the cooperative solution as an equilibrium through a nonlinear transfer-payment contract. Our results illustrate that cooperation can be regarded as a value-added strategy in establishing such lease contracts. Besides, our numerical results show that although cooperation always increases the total profit of the players, the magnitude of increase is case specific. When the lease price is low or the revenue is high, the profits in the non-cooperative contracts will be close to the cooperative alternative, while the cooperation may increase the total profit significantly in other cases. For maintenance outsourcing, we have studied different bargaining scenarios in determining the contract terms. First, we have considered the Nash bargaining solution to compute the bargaining profit of players. Next, we have considered the case where players pose threat against each other in order to increase their own bargaining position. We have determined the optimal threat strategy for each player. Our result shows that although such threatening decreases the efficiency of the contract, it can dramatically increase the profit of the player with a higher bargaining position. We have finally provided a solution to the problem of how the service agent and customer can cooperate and negotiate on the price. We have determined the discounted price as a result of negotiation. Indeed, the discounted price induces the customer to choose the total maximum maintenance policy. Our numerical examples illustrate the feasibility of using such a price-discount contract in maintenance service outsourcing. Moreover, one can see that both the customer and agent can benefit from this price-discount contract.
    • Games of Decentralized Inventory Management

      Dror, Moshe; Summerfield, Nichalin Suakkaphong; Dror, Moshe; Walker, Mark; Reynolds, Stanley S (The University of Arizona., 2010)
      Any decentralized retail or wholesale system of competing entities requires a benefit sharing arrangement when competing entities collaborate after their demands are realized. For instance, consider a distribution system similar to the observed behavior of independent car dealerships. If a dealership does not have in stock the car requested by a customer, it might consider acquiring it from a competing dealer. Such behavior raises questions about competitive procurement strategies that achieve system optimal outcomes. This dissertation consists of three main bodies of work contained respectively in chapters 2, 3, and 4. In the first work -- chapter 2, we examine a decentralized system that adopts an ex-post agreed transfer payment approach proposed by Anupindi et al. (Manuf. Serv. Oper.Manag. 4(3):349-368, 2001). In particular, we state a set of conditions on cost parameters and distributions that guarantee uniqueness of pure strategy Nash equilibrium. In the second work -- chapter 3, we introduce a multilevel graph framework that links decentralized inventory distribution models as a network of stochastic programming with recourse problems. This framework depicts independent retailers who maximize their individual expected profits, with each retailer independently procuring inventory in the ex-ante stage in response to forecasted demand and anticipated cooperative recourse action of all retailers in the system. The graph framework clarifies the modeling connection between problems in a taxonomy of decentralized inventory distribution models. This unifying perspective links the past work and shades light on future research directions. In the last work -- chapter 4, we examine and recast the biform games modeling framework as two-stage stochastic programming with recourse. Biform games modeling framework addresses two-stage games with competitive first stage and cooperative second stage without ex-ante agreement on profit sharing scheme. The two-stage stochastic programming view of biform games is demonstrated on examples from all the known examples regarding operational decision problems of competing firms from the literature. It allows an “old” mathematical methodology to showcase its versatility in modeling combined competitive and cooperative game options. In short, this dissertation provides important insights, clarifications, and strategic limitations regarding collaborations in decentralized distribution system.
    • Gamification in Education

      Sandusky, Susan; UA South Educational Technology (The University of Arizona., 2015)
      Gamification in education is an up and coming idea. This paper will look at what gamification is and the effects of gamification on student motivation, homework, and assessment. Intrinsic and extrinsic motivation is discussed and the effects gamification has on both types. Learners use intrinsic motivation when first completing a gamified lesson, however, some learners turned their motivation to extrinsic motivation after a period of time. The future of gamification in e-learning is also, although brief, discussed.