Superfield approach to the spontaneous breakdown of local supersymmetry

The goal of this thesis is to obtain a superfield formulation of local supersymmetry, and to construct via this formalism a model of spontaneous local supersymmetry breakdown. In the first chapter, the superfield method and some globally supersymmetric models are reviewed. These include Lagrangians for massive interacting chiral multiplets, and models for both massive and massless vector multiplets. In particular, the globally supersymmetric extension of the Higgs mechanism, due to Fayet, is described in detail. This model will form the basis of a locally supersymmetric model incorporating spontaneous supersymmetry breakdown in the third chapter. None of this work is original. The second chapter is devoted to gauging supersymmetry without superfields . The earliest supergravity theories (those not involving matter coupling) are reviewed. The fiber bundle approach is described, and shown to be ambiguous. An alternative algebraic scheme for dealing with gravi¬ tational symmetries is given. Superfield supergravity in two dimensions forms the subject matter of the third chapter. A brief glimpse of a one-dimensional locally supersym¬ metric theory (the spinning particle) is given. Its two-dimensional analogue, the spinning string, is obtained first without recourse to superfields, and then via an elegant superfield Ansatz due to Howe. It is shown how to derive this Ansatz and its transformation. Finally, a locally supersymmetric version of the Fayet model is given. The generalised Higgs mechanism works to remove the Goldstone spinor, but via a gauge field (the gravitino) which is forced to be non-dynamical in two dimensions. The methods of the third chapter are extended to four dimensions in the fourth chapter. The corresponding vielbein is derived, and shown not to transform covariantly without the addition of new terms. An attempt is made to find these terms, and it is argued that no additions can render the vielbein covariant. Consequently the approach of the third chapter proves inapplicable to four dimensions, and no matter-supergravity coupling can be obtained in this way. Three appendices on the history of anticommuting variables, the use of differential forms, and on some useful identities, complete the thesis

Tulane University Office of Development

As an intern with the Development Department, I served as support for Julianne Nice, Assistant Vice President for University Program Development and interim Director of Major Gifts

El panel de la pasión de Santa Clara y las clarisas de Palma de Mallorca: un estudio preliminar

The large panel painting of the Passion in Palma de Mallorca is an impressive but little-studied work. This essay introduces a long-term, collabo- rative project that will examine the panel’s religious, historical, and art histor- ical significance. While earlier scholarship has largely focused on questions of dating and stylistic attribution, we also explore possible explanations for the panel’s anomalous style as well as its meanings to the Clarissan nuns of Palma de Mallorca, who, we believe, were the panel’s primary viewers. We argue for the importance of this female community in commissioning the altarpiece and determining its key subjects and themes. These Clares shared with their pow- erful allies, the Franciscan Order, the papacy, and the royal house of Mallorca, a desire to serve and strengthen Christianity throughout their known world. The nuns could not participate in missionary activity abroad, but close to home were the non-Christian residents of Mallorca. For the nuns of Santa Clara, the presence of Jewish neighbors was especially disturbing. The Mallorca panel of the Passion was primarily devotional; it does not overtly preach through its pic- tures a Christian supremacy over “infidels”. Nevertheless, the far-reaching goals of the Church and the Franciscans affect the panel in concrete ways, from its Byzantine-inflected style to its unusual attention to the Jews of the Passion story.La gran tabla de la Pasión de Palma de Mallorca es una obra impresionante pero poco estudiada. Este ensayo presenta un proyecto colabo- rativo a largo plazo que examinará la importancia histórica religiosa, histórica y artística del panel. Si bien los estudios anteriores se han centrado en gran medida en cuestiones de datación y atribución estilística, se aportan posibles explicaciones sobre el estilo anómalo del panel, así como sus significados para las monjas Clarissas de Palma de Mallorca, quienes, creemos, fueron las prin- cipales espectadoras del panel. Se destaca la importancia de esta comunidad femenina en el encargo del retablo y la determinación de sus sujetos y temas clave. Estas Clarisas compartían con sus poderosos aliados, la Orden Francis- cana, el papado y la casa real de Mallorca, el deseo de servir y fortalecer la cristiandad en todo el mundo conocido. Las monjas no podían participar en la actividad misionera en el extranjero, pero tenían cerca residentes no cris- tianos de Mallorca. Para las monjas de Santa Clara, la presencia de vecinos judíos resultaba especialmente inquietante. El panel de Mallorca de la Pasión fue principalmente devocional; no se evidencia a través de sus imágenes una supremacía cristiana sobre los "infieles". Sin embargo, los objetivos de gran alcance de la Iglesia y los franciscanos afectan al panel de maneras concretas, desde su estilo con inflexión bizantina hasta su atención inusual a los judíos de la historia de la Pasión.Humanidade

Prison Productions: Textiles and Other Military Supplies from State Penitentiaries in the Trans-Mississippi Theater during the American Civil War

This thesis examines the state penitentiaries of Louisiana, Arkansas, and Texas that became sources of wartime supplies during the Civil War. A shortage of industry in the southwest forced the Confederacy to use all manufactories efficiently. Penitentiary workshops and textile mills supplied a variety of cloth, wood, and iron products, but have received minimal attention in studies of logistics. Penitentiary textile mills became the largest domestic supplier of cloth to Confederate quartermasters, aid societies, citizens, slaves, and indigent families. This study examines how penitentiary workshops converted to wartime production and determines their contribution to the Confederate war effort. The identification of those who produced, purchased, distributed, and used penitentiary goods will enhance our knowledge of overall Confederate supply

Regional impact of port and transport policies - the Ecuador case.

Massachusetts Institute of Technology. Dept. of Urban Studies and Planning. Thesis. 1972. M.C.P.Leaf number 29 used twice.Includes bibliographical references.M.C.P

Structural Analysis and Test Comparison of a 20-Meter Inflation-Deployed Solar Sail

Under the direction of the NASA In-Space Propulsion Technology Office, the team of L Garde, NASA Jet Propulsion Laboratory, Ball Aerospace, and NASA Langley Research Center has been developing a scalable solar sail configuration to address NASA s future space propulsion needs. Prior to a flight experiment of a full-scale solar sail, a comprehensive test program was implemented to advance the technology readiness level of the solar sail design. These tests consisted of solar sail component, subsystem, and sub-scale system ground tests that simulated the aspects of the space environment such as vacuum and thermal conditions. In July 2005, a 20-m four-quadrant solar sail system test article was tested in the NASA Glenn Research Center s Space Power Facility to measure its static and dynamic structural responses. Key to the maturation of solar sail technology is the development of validated finite element analysis (FEA) models that can be used for design and analysis of solar sails. A major objective of the program was to utilize the test data to validate the FEA models simulating the solar sail ground tests. The FEA software, ABAQUS, was used to perform the structural analyses to simulate the ground tests performed on the 20-m solar sail test article. This paper presents the details of the FEA modeling, the structural analyses simulating the ground tests, and a comparison of the pretest and post-test analysis predictions with the ground test results for the 20-m solar sail system test article. The structural responses that are compared in the paper include load-deflection curves and natural frequencies for the beam structural assembly and static shape, natural frequencies, and mode shapes for the solar sail membrane. The analysis predictions were in reasonable agreement with the test data. Factors that precluded better correlation of the analyses and the tests were unmeasured initial conditions in the test set-up

Ground Testing A 20-Meter Inflation Deployed Solar Sail

Solar sails have been proposed for a variety of future space exploration missions and provide a cost effective source of propellantless propulsion. Solar sails span very large areas to capture and reflect photons from the Sun and are propelled through space by the transfer of momentum from the photons to the solar sail. The thrust of a solar sail, though small, is continuous and acts for the life of the mission without the need for propellant. Recent advances in materials and ultra-low mass gossamer structures have enabled a host of useful space exploration missions utilizing solar sail propulsion. The team of L Garde, NASA Jet Propulsion Laboratory (JPL), Ball Aerospace, and NASA Langley Research Center, under the direction of the NASA In-Space Propulsion Office (ISP), has been developing a scalable solar sail configuration to address NASA s future space propulsion needs. The 100-m baseline solar sail concept was optimized around the one astronomical unit (AU) Geostorm mission, and features a Mylar sail membrane with a striped-net sail suspension architecture with inflation-deployed sail support beams consisting of inflatable sub-Tg (glass transition temperature) rigidizable semi-monocoque booms and a spreader system. The solar sail has vanes integrated onto the tips of the support beams to provide full 3-axis control of the solar sail. This same structural concept can be scaled to meet the requirements of a number of other NASA missions. Static and dynamic testing of a 20m scaled version of this solar sail concept have been completed in the Space Power Facility (SPF) at the NASA Glenn Plum Brook facility under vacuum and thermal conditions simulating the operation of a solar sail in space. This paper details the lessons learned from these and other similar ground based tests of gossamer structures during the three year solar sail project

Efficiently interdicting a time-expanded transshipment network

A network interdictor' has a limited supply of resource with which to disrupt a network user's" flow of supplies in a capacitated transshipment network. The interdictor's problem of minimizing the maximum flow through the network is a difficult- to-solve integer programming problem but we show that a heuristic based on Lagrangian relaxation is very effective in approximately solving the problem. We implement algorithms in C to approximately solve both the static (without considering time) and dynamic network interdiction problems. Static test networks range in size from 25 nodes and 64 arcs to 400 nodes and 1519 arcs. Using an IBM Rs/6000 Model 590 workstation, we find optimal solutions for seven of 12 test networks and solve the largest problem in only 31.0 seconds. We model a dynamic network in time-expanded form in order to assign time weights of 0 or 1 to flow, include repair time of interdicted arcs, and provide a schedule to the network interdictor that identifies arcs and time periods for interdictions. Dynamic networks range in size from 525 nodes and 1, 344 arcs to 40,400 nodes and 153,419 arcs (in time-expanded form). We find near- optimal solutions in 13 of 24 test networks and solve the largest network in 1729.5 secondshttp://archive.org/details/efficientlyinter00derbLieutenant Commander, United States NavyApproved for public release; distribution is unlimited