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Allmond, Jon, Ryan Birkelbach, Joe Campbell, Will Chapman, Karl Hassenftatz, Andrew Laidler, Tood Lucht, et al. "Recapitalization of Amphibious Operation and Lift." Thesis, Monterey, California : U.S. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/7278.
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Includes supplementary material.CAPSTONE PROJECT REPORT
System Engineering and Analysis Cohort 18A and Temasek Defense Systems Institute
Approved for public release, distribution unlimited
The aging Whidbey Island and Harpers Ferry class ships, LSD-41 and 49 respectively, comprise just over one third of the amphibious navy. However, a solution to the capability gap created by the loss of these ships is needed to maintain the effectiveness of the amphibious fleet across a broad spectrum of mission areas. This research effort considers future ship designs and fleet architectures to meet the capability gaps left by the decommissioning of the LSD-41 and 49 class ships. With respect to lift capacity, performance capability, cost and a risk assessment, the analysis showed the LPD-17 or a LSD(X) approximately 30% larger than the existing classes to be acceptable replacement classes. This analysis also supports further research to determine the most robust fleet architecture apart from the current eleven LHA or LHD, eleven LPD and eleven LSD paradigm.
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Stewart, Neil Sutherland. "Enhanced microcomputer operation of X-ray diffractometers and subsequent applications." Thesis, Robert Gordon University, 1992. http://hdl.handle.net/10059/577.
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The work described within this thesis is mainly concerned with the solution and refinement of the molecular structures of a variety of novel compounds. A number of X-ray and neutron diffractometers have been utilised for the analysis of specific compounds, depending on the nature of the investigation. Each of the instruments represented differing levels of computer automation and instrumentation. A powder diffractometer, representing old technology was interfaced to a microcomputer to enhance the instruments performance. A brief overview is given of the numerical processes involved in the elucidation and refinement of molecular structures from X-ray and neutron diffraction data. Particular attention has been placed on the role of computers to perform these calculations. The operation of the diffractometers employed in this study has been discussed comparing the benefits of each. A detailed report of the techniques used to enhance the low resolution diffractometer and of the experiments performed to highlight the increased performance has been included. Single crystal and powder diffraction studies were made of a wide variety of crystalline materials ranging from steroids to organometallic compounds. The X-ray structures were solved using Direct and Patterson vector methods from experimental data collected on a four circle diffractometer at Aberdeen University. Neutron diffraction experiments, performed at the Rutherford Appleton Laboratory, were commissioned to determine and refine the positions of the hydrogen atoms of two known structures, previously solved by Xray studies. Finally a critical evaluation of current computer automated diffractometers is presented, highlighting the new areas of instrument development.
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Haskiya, Wasim. "Robotic assembly : chamferless peg-hole assembly operation from X/Y/Z directions." Thesis, De Montfort University, 2000. http://hdl.handle.net/2086/4816.
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Restadh, Petter. "The Ratliff-Rush Operation for Certain Monomial Ideals in K[x, y]." Thesis, Uppsala universitet, Algebra och geometri, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328743.
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Lin, Jiunn-Yuan. "Optimisation of multi-pulse pumping for collisional excitation X-ray lasers." Thesis, University of Essex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265028.
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Pietruszka, Renee B. "Operation and characteristics of the Flash X-Ray Generator at the Naval Postgraduate School." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26130.
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Installation of the Model 112A Pulserad Pulsed X ray Generator at the Naval Postgraduate School Flash X ray Facility was completed in August of 1988. Characterization of the Pulserad 112A is essential to its effective use in future radiation effects study. This study will describe the basic system components, the principles of beam generation, an the characteristics of the radiation output. Fundamentals of radiation dosimetry and their application to flash X-ray sources will be discussed. Finally, the results of initial mapping of the radiation field generated by the Model 112A Pulserad Pulsed X-Ray Generator will be presented
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Wang, Li Ge. "Particle breakage mechanics in milling operation." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28950.
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Milling is a common unit operation in industry for the purpose of intentional size reduction. Considerable amount of energy is consumed during a grinding process and much of the energy is dissipated as heat and sound, which often makes grinding into an energy-intensive and highly inefficient operation. Despite many attempts to interpret particle breakage during a milling process, the grindability of a material in a milling operation remains aloof and the mechanisms of particle breakage are still poorly understood. Hence the optimisation and refinement in the design and operation of milling are in great need of an improved scientific understanding of the complex failure mechanisms. This thesis aims to provide an in-depth understanding of particle breakage associated with stressing events that occur during milling. A hybrid of experimental, theoretical and numerical methods has been adopted to elucidate the particle breakage mechanics. This study covers from single particle damage at micro-scale to bulk comminution during the whole milling process. The mechanical properties of two selected materials, i.e. alumina and zeolite were measured by indentation techniques. The breakage test of zeolite granules subjected to impact loading was carried out and it was found that tangential component velocity plays an increasingly important role in particle breakage with increasing impact velocity. Besides, single particle breakage via in-situ loading was conducted under X-ray microcomputed tomography (μCT) to study the microstructure of selected particles, visualize the progressive failure process and evaluate the progressive failure using the technique of digital image correlation (DIC). A new particle breakage model was proposed deploying a mechanical approach assuming that the subsurface lateral crack accounts for chipping mechanism. Considering the limitation of existing models in predicting breakage under oblique impact and the significance of tangential component velocity identified from experiment, the effect of impact angle is considered in the developed breakage model, which enables the contribution of the normal and tangential velocity component to be rationalized. The assessment of breakage models including chipping and fragmentation under oblique impact suggests that the equivalent normal velocity proposed in the new model is able to give close prediction with experimental results sourced from the public literature. Milling experiments were performed using the UPZ100 impact pin mill (courtesy by Hosokawa Micron Ltd. UK) to measure the comminution characteristics of the test solids. Several parameters were used to evaluate the milling performance including product size distribution, relative size span, grinding energy and size reduction ratio etc. The collective data from impact pin mill provides the basis for the validation of numerical simulation results. The Discrete Element Method (DEM) is first used to model single particle breakage subject to normal impact loading using a bonded contact model. A validation of the bonded contact model was conducted where the disparity with the experimental results is discussed. A parametric study of the most significant parameters e.g. bond Young’s modulus, the mean tensile bond strength, the coefficient of variation of the strength and particle & particle restitution coefficient in the DEM contact model was carried out to gain a further understanding of the effect of input parameters on the single particle breakage behavior. The upscaling from laboratory scale (single particle impact test) to industrial process scale (impact pin mill) is achieved using Population Balance Modelling (PBM). Two important functions in PBM, the selection function and breakage function are discussed based on the single particle impact from both experimental and numerical methods. An example of predicting product size reduction via PBM was given and compared to the milling results from impact pin mill. Finally, the DEM simulation of particle dynamics with emphasis on the impact energy distribution was presented and discussed, which sheds further insights into the coupling of PBM and DEM.
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Bender, Howard A. "Analysis of the operation and plasma dynamics of extreme-ultraviolet and soft x-ray lasers." Doctoral diss., University of Central Florida, 1998. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/13443.
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University of Central Florida College of Arts and Sciences ThesisExtending lasing action into the extreme ultaviolet and soft x-ray regions of the electromagnetic spectrum has been a natural progression in the continuing development of short wavelength radiation sources. However fundamental difficulties with the media used to produce short wavelength lasers has in general hindered the widespread development and use of such lasers in applications. Up to now all EUV and soft x-ray lasers have operated with plasmas as the gain medium to support lasing. This is a general requiremnt imposed by 1) the characteristics of short wavelength radiation as it originates from highly energetic atomic transitions and 2) the fundamental aspects of lasing at these wavelengths. Thus the plasma environment has been the defining characteristic in achieving lasing in the EUV and soft x-ray spectral regions. This thesis presents investigations into two types of EUV/Soft x-ray lasers that describe the operation and associated plasma dynamics of these devices. The first is a numerical investigation into a recombination pumped x-ray laser at 13.5 nm operating in a Li plasma. Using a collisional-radiative model of the atomic system, simulations were performed to determine the plasma conditions necessary to produce gain that were observed in reported experiments. The second investigation is the experimental development and operation of a capillary discharge driven laser operating at 46.9 nm in Ar. This device is a new generation of EUV/Soft X-ray laser based on a small scale driver system. The first interferometric probing experiments of this device will be discussed and related to the plasma dynamics of the capillary discharge.
Ph.D.;
Physics
Arts and Sciences;
Physics
162 p.
xiii, 162 leaves, bound : ill. ; 28 cm.
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Kusi-Obodum, Christian. "Alfonso X and Islam : narratives of conflict and co-operation in the Estoria de España." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8095/.
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Medieval Iberian literary tradition constitutes a vast corpus of writings with which to study interfaith relations – in particular, Christian attitudes towards Muslims. This thesis focuses on works produced in the thirteenth century under king Alfonso X of Castile-Leon. Scholars have often looked to Alfonso X's poetry and legal texts to explore Christian responses to Islam, at a pivotal moment of Christian domination in the Peninsula. The thesis looks to Alfonso's historiography (the Estoria de España), which has received much less attention from scholars of interfaith relations. This study employs a historical-critical method of interpretation to explore the transmission and reformulation of Christian society's attitudes towards Islam. It offers a sophisticated analysis of the narratives of three prominent figures in the history of Spanish Islam: a) the Prophet Muhammad, b) Ibn Abi Amir al-Mansur, and c) King al- Mamun of Toledo. The study reveals the wide-ranging and contrasting attitudes towards Muslims visible not only in the writings of Alfonso X, but throughout the broader historiography and literature of medieval Spain. The thesis explains how these contradictions are rooted in the paradoxes of conflict and co-operation among the faiths in the Peninsula. It concludes that the ambivalence of Christian writers allows for the coexistence of both disdain and respect for Muslims in medieval society.
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Lauf, Thomas Verfasser], Günther [Akademischer Betreuer] [Hasinger, and Stephan [Akademischer Betreuer] Paul. "Analysis and Operation of DePFET X-ray Imaging Detectors / Thomas Lauf. Gutachter: Günther Hasinger ; Stephan Paul. Betreuer: Günther Hasinger." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1013436253/34.
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Neiser, Richard A. "Considerations in the design and operation of synchrotron radiation beamlines (including a discussion on the properties of synchrotron radiation." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/101246.
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The X-ray optics of synchrotron radiation beamlines are considered in this paper. The characteristics of synchrotron radiation which make it the premier source of light for studies in many regions of the electromagnetic spectrum are given. A chapter is devoted to the collimating, focusing and monochromating optics of two X-ray diffraction beamlines at the National Synchrotron Light Source. The beamlines are operated by the Naval Research Laboratory (NRL) and the Oak Ridge National Lab (ORNL). The major optical components of these beamlines are reviewed in regards to their function and their flexibility. A detailed analysis is performed on the NRL X-ray collimating mirror. The mirror is treated as an elastically bent beam. Deflection and slope error equations are developed which relate the shape of the bent mirror to its ideal surface. Visible light diffraction patterns collected from the mirror helped to establish operating conditions which provide good collimation. When the observed patterns are wed to the theoretical calculations, estimates of the average figure error are made. Finally, the effect of a highly collimated synchrotron beam on the reproducibility of the integrated intensities from polycrystalline materials is considered. The calculations show that except for the most fine grained materials, representative intensity measurements can only be made when the sample is permitted to move.M.S.
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Steiniger, Klaus. "High-Yield Optical Undulators Scalable to Optical Free-Electron Laser Operation by Traveling-Wave Thomson-Scattering." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234847.
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All across physics research, incoherent and coherent light sources are extensively utilized. Especially highly brilliant X-ray sources such as third generation synchrotrons or free-electron lasers have become an invaluable tool enabling experimental techniques that are unique to these kinds of light sources. But these sources have developed to large scale facilities and a demand in compact laboratory scale sources providing radiation of similar quality arises nowadays. This thesis focuses on Traveling-Wave Thomson-Scattering (TWTS) which allows for the realization of ultra-compact, inherently synchronized and highly brilliant light sources. The TWTS geometry provides optical undulators, through which electrons pass and thereby emit radiation, with hundreds to thousands of undulator periods by utilizing pulse-front tilted lasers pulses from high peak-power laser systems. TWTS can realize incoherent radiation sources with orders of magnitude higher photon yield than established head-on Thomson sources. Moreover, optical free-electron lasers (OFELs) can be realized with TWTS if state-of-the-art technology in electron accelerators and laser systems is utilized. Tilting the laser pulse front with respect to the wavefront by half of this interaction angle optimizes electron and laser pulse overlap by compensating the spatial offset between electrons and the laser pulse-front at the beginning of the interaction when the electrons are far from the laser pulse axis. The laser pulse-front tilt ensures continuous overlap between electrons and laser pulse while the electrons cross the laser pulse cross-sectional area. Thus the interaction distance can be controlled in TWTS by the laser pulse width rather than laser pulse duration. Utilizing wide, petawatt class laser pulses allows realizing thousands of optical undulator periods. This thesis will show that TWTS OFELs emitting ultraviolet radiation are realizable today with existing technology for electron accelerators and laser systems. The requirements on electron bunch and laser pulse quality of these ultraviolet TWTS OFELs are discussed in detail as well as the corresponding requirements of TWTS OFELs emitting in the soft and hard X-ray range. These requirements are derived from scaling laws which stem from a self-consistent analytic description of the electron bunch and radiation field dynamics in TWTS OFELs presented within this thesis. It is shown that these dynamics in TWTS OFELs are qualitatively equivalent to the electron bunch and radiation field dynamics of standard free-electron lasers which analytically proves the applicability of TWTS for the realization of an optical free-electron laser. Furthermore, experimental setup strategies to generate the pulse-front tilted TWTS laser pulses are presented and designs of experimental setups for the above examples are discussed. The presented setup strategies provide dispersion compensation, required due to angular dispersion of the laser pulse, which is especially relevant when building compact, high-yield hard X-ray TWTS sources in large interaction angle setups. An example of such an enhanced Thomson source by TWTS, which provides orders of magnitude higher spectral photon density than a comparable head-on interaction geometry, is presented, tooInkohärente und kohärente Lichtquellen werden in allen Feldern der physikalischen Forschung intensiv eingesetzt. Im Besonderen ermöglichen hoch-brilliante Röntgenquellen, wie Synchrotrone der dritten Generation und Freie-Elektronen Laser, einzigartige Experimentiertechniken wodurch diese zu unverzichtbaren Werkzeugen wurden. Sie sind allerdings auch im Umfang zu Großforschungseinrichtungen herangewachsen. Um den hohen Bedarf an hoch-brillianten Lichtquellen zu decken, besteht daher die Notwendigkeit neuartige und kompakte Quellen zu entwickeln welche auf dem Maßstab eines Labors realisierbar sind. Diese Dissertation widmet sich der Traveling-Wave Thomsonstreuung (TWTS) welche die Realisierung ultra-kompakter, intrinsisch synchronisierbarer und hoch-brillianter Röntgenquellen ermöglicht. TWTS ist eine Methode der Streuung von Laserpulsen an relativistischen Elektronen. Dabei durchquert ein Elektronenpuls mit nahezu Lichtgeschwindigkeit einen Laserpuls. Während der Durchquerung beginnen die Elektronen im Feld des Laserpulses zu oszillieren wobei sie Strahlung emittieren. Die ausgesandte Strahlung besitzt eine deutlich kürzere Wellenlänge als das Laserfeld aufgrund der hohen Elektronengeschwindigkeit und der damit verbundenen großen Dopplerverschiebung. Das besondere an TWTS ist, dass Elektronen- und Laserpropagationsrichtung einen Winkel einschließen sowie pulsfrontverkippte Hochleistungslaserpulse eingesetzt werden. Dadurch können um Größenordnungen längere Interaktionsdistanzen als in herkömmlichen frontalen Thomsonstreuungsanordnungen erreicht werden. TWTS ermöglicht dadurch die Realisierung optischer Freie-Elektronen Laser (OFEL) und inkohärenter Strahlungsquellen mit einer um Größenordnungen erhöhten Photonenausbeute gegenüber Thomsonstreuungsquellen in frontalen Interaktionsanordungen. Werden modernste Elektronenbeschleuniger und Lasersysteme genutzt, dann ist der Betrieb optischer Freie-Elektronen Laser bereits heute mit TWTS möglich. Das wird in der Dissertation am Beispiel eines Vakuumultraviolettstrahlung emittierenden TWTS OFEL gezeigt. Dessen Anforderungen an die Qualität der Elektronen- und Laserpulse werden im Detail in der Arbeit besprochen sowie weitere Beispiele weicher und harter Röntgenstrahlung emittierender TWTS OFEL präsentiert. Diese Anforderungen werden anhand von Skalierungsvorschriften ermittelt welche aus einer selbstkonsistenten, 1.5 dimensionalen Theorie zur Wechselwirkung zwischen Elektronen und Laserfeld in TWTS abgeleitet sind. Sowohl die Theorie zur Wechselwirkung als auch die Ableitung der Skalierungsvorschriften sind Teile dieser Dissertation. Eine wichtige Erkenntnis der Theorie ist die qualitative Äquivalenz von Elektronen- und Strahlungsfeldbewegungsgleichungen in TWTS zu denen herkömmlicher Freie-Elektronen Laser. Das beweist analytisch die Möglichkeit zur Realisierung eines OFEL mit TWTS. Einen weiteren wichtigen Teil dieser Dissertation bildet die Arbeit zur Generierung der Laserpulse mit verkippter Pulsfront. Optische Aufbauten zur Verkippung der Laserpulsfront werden vorgestellt und für einige der präsentierten TWTS OFEL ausführlich dargelegt. Die Aufbauten verkippen nicht nur die Laserpulsfront sondern gewähren gleichzeitig Kontrolle über die Laserpulsdispersionen. Dadurch kann während der gesamten Interaktionen eine ausreichend hohe Qualität des Laserfeldes sichergestellt werden, was für TWTS OFEL und inkohärente TWTS Lichtquellen mit großem Interaktionswinkel unbedingt notwendig ist. Ein Beispiel einer inkohärenten TWTS Lichtquelle wird ebenfalls präsentiert. Diese emittiert Strahlung mit einer um Größenordnungen höheren spektrale Photonendichte als eine herkömmliche Thomsonquelle in einer frontalen Streuanordnung mit vergleichbaren Laser- und Elektronenpulsen
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Gonçalves, Priscila Madruga Ribeiro. "OPERAÇÃO CONDOR: LEI DE ANISTIA Nº 6.683/79 X TRATADOS DE DIREITOS HUMANOS." Pontifícia Universidade Católica de Goiás, 2013. http://localhost:8080/tede/handle/tede/2677.
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Previous issue date: 2013-05-06This work is linked to the line of research on "International Relations", of the Post-Graduate strictly in Law, International Relations and Development at the Pontifical Catholic Univeridade of Goiás and analyzes the possible contradictions between National Law and the International Direinto issues involving human rights, especially the question of internalization of norms of international law to adjudicate crimes committed during the military dictatorship. We started from the hypothesis that the Brazilian Federal Constitution greets, from the Constitutional Amendment 45 of 2004, which added § 3 of Art. 5th treaties and conventions that deal with the status of Human Rights Constitutional Amendment, through which the rules should be interpreted as a higher-ranking international front alluded to the internal laws infra. Operation Condor, international relations between countries of the Southern Cone during the Military Dictatorship, serves as the object for the development of this study about International Law and Comparative Law regarding the apparent divergence of opinion as to the legislative process and court between the Southern Cone countries on issues relating to international relations and conventions on Human Rights. Currently, Brazil is the only country in Latin America that have not punished the perpetrators of the military dictatorship because of constitutional legislation (Amnesty Law No. 6.683/79) which is in obvious conflict with international standards and the trend of the constitutionalization fundamental rights and guarantees of the human person, especially with regard to art. 5, § 3 of the CF/88. Unlike their neighbors, former partners of the organization of terror, Argentina, Paraguay, Uruguay, Chile and Peru, Brazil has not yet manifested itself in view of the recommendations of the Inter-American Court of Human Rights to prosecute and punish those responsible for crimes committed during the dictatorship Military, unlike the Brazilian Supreme Court, in ADPF No. 153, as manifested by not revocability of Law 6.683/79 front ace Human Rights Conventions to which Brazil is a signatory. From this divergence of understandings between the Brazilian Supreme Court and Court of Human Rights, sought to present possible solutions to the antinomy material between the Brazilian National Law and International Law, focusing on the possibility of punishment for crimes committed during the Military Dictatorship forward to Operation Condor.
Este trabalho vincula-se à linha de pesquisa sobre Relações Internacionais , do Programa de Pós-Graduação stricto sensu em Direito, Relações Internacionais e Desenvolvimento da Pontifícia Univeridade Católica do Estado de Goiás e analisa as possíveis antinomias entre Direito Interno e Direinto Internacional nas questões que envolvem Direitos Humanos, sobretudo à questão da internalização das normas de Direito Internacional para processar e julgar os crimes cometidos no período da Ditadura Militar. Parte-se da hipótese de que a Constituição Federal brasileira recepciona, a partir da Emenda Constitucional 45 de 2004, que acrescentou o §3º ao art. 5º aos tratados e convenções que versem sobre Direitos Humanos o status de Emenda Constitucional, através do qual devem ser interpretadas as normas internacionais aludidas como hierarquicamente superiores frente às leis internas infraconstitucionais. A Operação Condor, símbolo das relações internacionais entre os países do Cone Sul durante o período da Ditadura Militar, serve de objeto para o desenvolvimento do presente estudo acerca de Direito Internacional e Direito Comparado quanto às evidentes divergências de entendimento quanto ao processo legislativo e jurisdicional entre os países do Cone Sul diante de questões ligadas às relações internacionais e às convenções de Direitos Humanos. Atualmente, o Brasil é o único país da America Latina que ainda não puniu os algozes da Ditadura Militar em razão de legislação infraconstitucional (Lei de Anistia nº 6.683/79) a qual se encontra em evidente conflito com as normas internacionais e a tendência da constitucionalização dos direitos e garantias fundamentais da pessoa humana, especialmente no que se refere ao art. 5º, § 3º da CF/88. Ao contrário dos seus vizinhos, antigos parceiros da organização do terror, Argentina, Paraguai, Uruguai, Chile e Peru, o Brasil ainda não se manifestou atendendo às recomendações da Corte Interamericana de Direitos Humanos para processar e punir os responsáveis pelos crimes cometidos durante a Ditadura Militar, ao contrário, a Corte Suprema brasileira, na ADPF nº 153, já se manifestou pela não revogabilidade da Lei 6.683/79 frente ás Convenções de Direitos Humanos em que o Brasil é signatário. A partir dessa divergência de entendimentos entre a Corte Suprema brasileira e a Corte Interamericana de Direitos Humanos, buscou-se apresentar possíveis soluções para a antinomia material entre o Direito Interno brasileiro e o Direito Internacional, com enfoque na possibilidade de punição dos crimes cometidos durante o período da Ditadura Militar frente à Operação Condor.
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Siebert, Andreas [Verfasser], Marcus [Akademischer Betreuer] Bär, and Jörg [Gutachter] Libuda. "Insights into Operation-Induced Changes of Next Generation Post-Lithium Battery Electrodes Revealed by X-Ray Spectroscopic Operando Measurements / Andreas Siebert ; Gutachter: Jörg Libuda ; Betreuer: Marcus Bär." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2020. http://d-nb.info/1221370391/34.
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Soldat, Jan [Verfasser], and Peter [Akademischer Betreuer] Fischer. "Characterization, Operation and Wafer-level Testing of an ultra-fast 4k Pixel Readout ASIC for the DSSC X-ray Detector at the European XFEL / Jan Soldat ; Betreuer: Peter Fischer." Heidelberg : Universitätsbibliothek Heidelberg, 2018. http://d-nb.info/1177691531/34.
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Sinha, Priyanjana [Verfasser], Thomas Sunn [Akademischer Betreuer] Pedersen, Thomas Sunn [Gutachter] Pedersen, and Bruce [Gutachter] Lipschultz. "Edge and scrape-off layer physics modeling for Wendelstein 7-X in preparation of the operation phases OP1.2 and OP2 / Priyanjana Sinha ; Gutachter: Thomas Sunn Pedersen, Bruce Lipschultz ; Betreuer: Thomas Sunn Pedersen." Greifswald : Universität Greifswald, 2020. http://d-nb.info/1213447569/34.
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Lux-Baumann, Jessica, and Darryl A. Burkes. "HYPER-X (X-43A) FLIGHT TEST RANGE OPERATIONS OVERVIEW." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604791.
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ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, NevadaThe Hyper-X program flew X-43A research vehicles to hypersonic speeds over the Pacific Ocean in March and November 2004 from the Western Aeronautical Test Range, NASA Dryden Flight Research Center, Edwards, California. The program required multiple telemetry ground stations to provide continuous coverage of the captive carry, launch, boost, experiment, and descent phases of these missions. An overview is provided of vehicle telemetry and distributed assets that supported telemetry acquisition, best-source selection, radar tracking, video tracking, flight termination systems, and voice communications. Real-time data display and processing are discussed, and postflight analysis and comparison of data acquired are presented.
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Buzan, C. Craig. "Operational implications of 3 x 8 field artillery battalions." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA238796.
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Thesis (M.S. in Operations Research)--Naval Postgraduate School, September 1990.Thesis Advisor(s): Barr, Donald ; Dryer, David A. Second Reader: Read, Robert R. "September 1990." Description based on title screen viewed on December 17, 2009. DTIC Descriptor(s): Artillery, employment, battlefields, missions, platoon level organizations, fires, statistical analysis, battles, scenarios, yield. DTIC Identifier(s): Artillery fire, artillery units, army training, battery level organizations, field army, combat effectiveness, firepower, military doctrine, janus war games, military force levels, analysis of variance, factor analysis, platoon level organizations, computerized simulation, field artillery, scenarios, theses. Author(s) subject terms: Field Artillery, artillery, National Training Center, JANUS. Includes bibliographical references (p. 33-34). Also available in print.
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Santos, AndrÃa Feitosa dos. "Movimento do verbo e categorias vazias em I e V em um fragmento de gramÃtica computacional do portuguÃs." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4048.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorEsse trabalho possui um recorte teÃrico-metodolÃgico que se decompÃe em dois domÃnios complementares: o LinguÃstico e o Computacional/Implementacional. Pelo seu cunho computacional, o escopo primeiro desse trabalho està diretamente ligado ao processamento de lÃngua natural (PLN). Desse modo, implementa-se uma anÃlise sintÃtica automÃtica (parsing) de expressÃes de lÃngua portuguesa em programas da biblioteca em Python do NLTK, cujas anÃlises sÃo representadas em forma de configuraÃÃes arbÃreas que demonstram categorias vazias de sentenÃas finitas do portuguÃs. Ainda pelo cunho computacional, esse trabalho elabora um fragmento de gramÃtica, modelado para capturar traÃos especÃficos da estrutura linguÃstica do portuguÃs, com base no modelo formal de descriÃÃo linguÃstica conhecido como GramÃtica Livre de Contexto (CFG) Baseada em TraÃos, com a finalidade de demonstrar como a biblioteca de programas do NLTK dà suporte à realizaÃÃo dos analisadores sintÃticos na anÃlise da estrutura de traÃos. Pelo seu cunho lingÃÃstico, analisa-se, de acordo com a Teoria X-barra e o Programa Minimalista, frases nas variantes europeia e brasileira da lÃngua portuguesa, obtidas de pesquisas em corpora eletrÃnicos disponÃveis na web. E ainda nesse trabalho, descreve-se e discute-se a categoria IP (sintagma flexional) dentro da sua estrutura hierÃrquica de constituintes, de acordo com a hipÃtese da operaÃÃo sintÃtica de movimento visÃvel e nÃo visÃvel dos elementos linguÃsticos, especificamente o movimento do verbo
This work has a theoretical and methodological framework that is divided into two complementary areas: the Language and Computational/Implementacional. For its computational stamp, the first scope of this work is directly linked to the processing of natural language (PNL). Thus, it implements an automatic syntactic analysis (parsing) of expressions of Portuguese in a computational program from the Python library of NLTK, whose tests are represented in tree configurations that show slash categories of finite sentences of Portuguese. Although the stamp computing, this research elaborates a grammar fragment, modeled to capture specific features of linguistic structure of Portuguese, based on the formal model of description linguistic known as Context Free Grammar (CFG) Based on Features, with the purpose of demonstrate how the library of NLTK programs supports the implementation of parsers for analyzing the feature structure. For its stamp of language, it analyzes, according to X-bar Theory and the Minimalist Program, sentences in European and Brazilian variants of Portuguese, obtained from surveys in electronic corpora available on the web. And this work describes and discusses the category IP (inflectional phrase) within the hierarchical structure of constituents, according to the hypothesis of syntactic operation of visible and invisible movement of elements of language, specifically the movement of the verb
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Sandberg, Melanie (Melanie Jean). "Applications of ASDE-X Data to the analysis of airport surface operations." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74469.
Full textAbstract:
Thesis (S.M. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 133).
While much attention has been given to analyzing and optimizing problems in air transportation, relatively little research has gone into studying airport surface operations. In recent years a surface surveillance system called Airport Surface Detection Equipment, Model-X (ASDE-X) has been installed at over 30 airports in the US as a safety device. The applications of the data being captured by these systems are far broader than just promoting safety. In this thesis, it will be demonstrated how ASDE-X data can be analyzed to characterize airport operations, and how it might be used going forward in real-time. The process of converting the raw ASDE-X data into a useable format will be discussed. Then, an analysis of airport operations at LaGuardia Airport and Philadelphia Airport will be presented using three months of summer data. These airports will be studied both in an aggregate fashion as well as for individual runway configurations. Finally, a case study of an Android tablet application will be presented as a next step in automation for aiding airport traffic operations.
by Melanie Sandberg.
S.M.in Transportation
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Santos, Lúcio Murilo dos. "Avaliação do tipo de procedimento odontológico, cirurgia x dentística restauradora, na variabilidade do tempo de duração de dois anestésicos : bupivacaína x prilocaína /." São José dos Campos, 1997. http://hdl.handle.net/11449/113963.
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Orientador: Sigmar de Mello RodeBanca: Fernando Ricardo Xavier da Silveira
Banca: Antenor Araujo
Resumo: Os anestésicos locais devido ao seu grande uso na odontologia, têm sido causa de inúmeros estudos na literatura odontológica, contudo a grande maioria destes avalia tão somente o tempo de duração destas drogas, ou tece comentários sobre seus efeitos tóxicos e interações sistêmicas. Com este estudo procura-se observar a existência de alteração na variação do tempo de duração de dois anestésicos, quando usados com a mesma técnica anestésica, porém em procedimentos odontológicos distintos. A metodologia consistiu na formação de dois grupos com 14 pacientes cada, sendo que o grupo um era formado por pacientes que necessitavam de bloqueio ptérigo-mandibular para exodontia dos terceiros molares inferiores, e o grupo dois constituía-se de 14 pacientes que foram submetidos à mesma técnica anestésica com intuito de tratamento em dentística restauradora. Os resultados foram analisados segundo o diagrama Blox-Plot, teste "t" de Student e Mann-Whitney. A análise dos resultados revelou que: a variabilidade no tempo de duração da Bupivacaína (Neocaína) e da Prilocaína (Citocaína) é grande, porém todos os valores se incluem nas suas respectivas amostras; o tempo de duração do dois anestésicos não se encaixam na curva de distribuição normal; o tempo de duração anestésica da Bupivacaína a 0,5% com adrenalina a I:200.000 é, através do estudo das medianas, 2,2 vezes maior que da Prilocaína a 3% com Felipressina a 0,03 UI/ml; e que o tipo de procedimento odontológico, cirúrgico ou restaurador, não influi na variabilidade do tempo de duração dos dois anestésicos utilizados neste estudo
Abstract: The local anesthetics due to because of the large use in dentistry have been motive of a great number of researchs, however the focus of these studies is the duration time, toxic effects and sistemic interactions. With this research we have the pourpose to observe if have alteration in the time of duration between two anesthetics when used with the same anesthetics techinic, but with distinct dental procedure. Two groups with 14 subjects each were formed: one with a necessity of lower wisdom teeth surgery, and the other that need restourative dentistry. The results obtained were analysed by the Blox-Plot diagram, "t" test of Student and Mann-Whitney test. The data analysis show that have a significative variability of the duration time of bupivacaine and prilocaine, but all the datas are include in the same group; the duration time of both anesthetics don't follow the normal distribution courve; the anesthetic duration of bupivacaine 0,5% with epinephrine I: 200.000 is, in the median study, 2,2 major time that the prilocaine 3% with felipressin 0,03 UI/ml; and that the odontologic procedure mode, make no difference in the variability of duration time of two anesthetics used in this study
Mestre
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Palmer, Robert, and Glen Wolf. "MOBILE OPERATIONS FACILITY IN SUPPORT OF THE X-33 EXTENDED TEST RANGE ALLIANCE." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/606826.
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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, NevadaNASA and the Air Force are increasing the number of hypersonic and access-to-space programs creating a growing requirement for flight test ranges over large regional areas. A principal challenge facing these extended test ranges is the ability to provide continuous vehicle communications by filling the gaps in coverage between fixed ground stations. Consequently, there is a need for mobile range systems that provide a multitude of communication services under varying circumstances. This paper discusses the functional design and systems capabilities, as well as the mission support criteria, concerning NASA’s Mobile Operations Facility (MOF). The MOF will be deployed to Dugway Proving Grounds (DPG), Utah, in support of the X-33 single-stage-to-orbit (SSTO) demonstrator.
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Santos, Lúcio Murilo dos [UNESP]. "Avaliação do tipo de procedimento odontológico, cirurgia x dentística restauradora, na variabilidade do tempo de duração de dois anestésicos: bupivacaína x prilocaína." Universidade Estadual Paulista (UNESP), 1997. http://hdl.handle.net/11449/113963.
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000098945.pdf: 1230870 bytes, checksum: b95c5b3b1dd40f455b53a4a6753f6e98 (MD5)Os anestésicos locais devido ao seu grande uso na odontologia, têm sido causa de inúmeros estudos na literatura odontológica, contudo a grande maioria destes avalia tão somente o tempo de duração destas drogas, ou tece comentários sobre seus efeitos tóxicos e interações sistêmicas. Com este estudo procura-se observar a existência de alteração na variação do tempo de duração de dois anestésicos, quando usados com a mesma técnica anestésica, porém em procedimentos odontológicos distintos. A metodologia consistiu na formação de dois grupos com 14 pacientes cada, sendo que o grupo um era formado por pacientes que necessitavam de bloqueio ptérigo-mandibular para exodontia dos terceiros molares inferiores, e o grupo dois constituía-se de 14 pacientes que foram submetidos à mesma técnica anestésica com intuito de tratamento em dentística restauradora. Os resultados foram analisados segundo o diagrama Blox-Plot, teste “t de Student e Mann-Whitney. A análise dos resultados revelou que: a variabilidade no tempo de duração da Bupivacaína (Neocaína) e da Prilocaína (Citocaína) é grande, porém todos os valores se incluem nas suas respectivas amostras; o tempo de duração do dois anestésicos não se encaixam na curva de distribuição normal; o tempo de duração anestésica da Bupivacaína a 0,5% com adrenalina a I:200.000 é, através do estudo das medianas, 2,2 vezes maior que da Prilocaína a 3% com Felipressina a 0,03 UI/ml; e que o tipo de procedimento odontológico, cirúrgico ou restaurador, não influi na variabilidade do tempo de duração dos dois anestésicos utilizados neste estudo
The local anesthetics due to because of the large use in dentistry have been motive of a great number of researchs, however the focus of these studies is the duration time, toxic effects and sistemic interactions. With this research we have the pourpose to observe if have alteration in the time of duration between two anesthetics when used with the same anesthetics techinic, but with distinct dental procedure. Two groups with 14 subjects each were formed: one with a necessity of lower wisdom teeth surgery, and the other that need restourative dentistry. The results obtained were analysed by the Blox-Plot diagram, t test of Student and Mann-Whitney test. The data analysis show that have a significative variability of the duration time of bupivacaine and prilocaine, but all the datas are include in the same group; the duration time of both anesthetics don't follow the normal distribution courve; the anesthetic duration of bupivacaine 0,5% with epinephrine I: 200.000 is, in the median study, 2,2 major time that the prilocaine 3% with felipressin 0,03 UI/ml; and that the odontologic procedure mode, make no difference in the variability of duration time of two anesthetics used in this study
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Goertzen, Corissa Marie. "Operations on Infinite x Infinite Matrices and Their Use in Dynamics and Spectral Theory." Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/4849.
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By first looking at the orthonormal basis: Γ = {∑i 4 ibi ∈{0, 1}, finite sums} and the related orthonormal basis 5Γ = {5∑i 4i bi : bi ∈ {0, 1}, finite sums} we find several interesting relationships with the unitary matrix Uα,β arising from the operator U: Γ → 5Γ. Further, we investigate the relationships between U and the operators So : Γ → 4Γ defined by Soe4γ where eγ = e2ΠiΓ and S1: Γ → 4Γ+1 defined by S1eγ = e4γ+1.
Most intriguing, we found that when taking powers of the aforementioned Uα,β matrix that although there are infinitely many 1's occurring in the entries of Uα,β only one such 1 occurs in the subsequent higher powers Ukα,β. This means that there are infinitely many γ ∈ Γ ∩ 5Γ, but only one such γ in the intersection Γ and 5kΓ, for k ≥ 2.
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Larsson, Ylva. "Establishing low-energy x-ray fields and determining operational dose equivalent conversion coefficients." Thesis, Stockholm University, Medical Radiation Physics (together with KI), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8319.
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Reference radiation fields for x-ray qualities are described by the International Organization of Standards (ISO). This study describes the procedure to establish nine different low energy X-ray qualities at the national metrology laboratory, Swedish Radiation Protection Authority, following the document ISO 4037. Measurements of tube voltage, half-value layer, mean energy and spectral resolution have been performed for qualities N-15, N-20, N-25, N-30, N-40, L-20, L-30, L-35 and L-55. Furthermore, dose equivalent conversion coefficients for operational quantities ambient dose equivalent, personal dose equivalent and directional dose equivalent have been calculated by folding the mono-energetic conversion factors with measured spectral distributions of the x-ray qualities. The spectral distributions were unfolded from pulse-height distributions to photon distributions using simulated data of the semi-conductor detector used for measurements, generated with the Monte Carlo code PENELOPE.
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Witzel, Joy. "Operational and radiation safety guidelines for hand held intraoral x-ray systems a thesis /." San Antonio : UTHSC, 2008. http://learningobjects.library.uthscsa.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=21&CISOBOX=1&REC=11.
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Webb, Jason N. "The advanced features of Mac OS X and their benefits to the design community /." Online version of thesis, 2003. http://homepage.mac.com/jasonwebb/thesis/.
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Franco, Bruno Chaves [UNESP]. "Planejamento econômico de gráficos de controle X para monitoramento de processos autocorrelacionados." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/93084.
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franco_bc_me_guara.pdf: 1492178 bytes, checksum: 2c201ad6660278573573b0b255349982 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Esta pesquisa propõe o planejamento econômico de gráficos de controle ̅ para o monitoramento de uma característica de qualidade na qual as observações se ajustam a um modelo autorregressivo de primeira ordem com erro adicional. O modelo de custos de Duncan é usado para selecionar os parâmetros do gráfico, tamanho da amostra, intervalo de amostragem e os limites de controle. Utiliza-se o algoritmo genético na busca do custo mínimo de monitoramento. Para determinação do número médio de amostras até o sinal e o número de alarmes falsos são utilizadas Cadeias de Markov. Uma análise de sensibilidade mostrou que a autocorrelação provoca efeito adverso nos parâmetros do gráfico elevando seu custo de monitoramento e reduzindo sua eficiência
This research proposes an economic design of a ̅ control chart used to monitor a quality characteristic whose observations fit to a first-order autoregressive model with additional error. The Duncan's cost model is used to select the control chart parameters, namely the sample size, the sampling interval and the control limit coefficient, using genetic algorithm in order to search the minimum cost. The Markov chain is used to determine the average number of samples until the signal and the number of false alarms. A sensitivity analysis showed that the autocorrelation causes adverse effect on the parameters of the control chart increasing monitoring cost and reducing significantly their efficiency
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Santos, Andrea Feitosa dos. "Movimento do verbo e categorias vazias em I e V em um fragmento de gramática computacional do português." http://www.teses.ufc.br, 2009. http://www.repositorio.ufc.br/handle/riufc/2818.
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SANTOS, Andrea Feitosa. Movimento do verbo e categorias vazias em I e V em um fragmento de gramática computacional do português. 2009.96f.Dissertação (Mestrado em Linguistica) – Universidade Federal do Ceará, Departamento de Letras Vernaculas, Programa de Pós-Graduação em Linguística, Fortaleza-CE, 2009.Submitted by nazareno mesquita (nazagon36@yahoo.com.br) on 2012-06-21T16:00:03Z No. of bitstreams: 1 2009_diss_AFSantos.pdf: 616159 bytes, checksum: 59bd79e8c618b1d231d8b7b98b8f767e (MD5)
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This work has a theoretical and methodological framework that is divided into two complementary areas: the Language and Computational/Implementacional. For its computational stamp, the first scope of this work is directly linked to the processing of natural language (PNL). Thus, it implements an automatic syntactic analysis (parsing) of expressions of Portuguese in a computational program from the Python library of NLTK, whose tests are represented in tree configurations that show slash categories of finite sentences of Portuguese. Although the stamp computing, this research elaborates a grammar fragment, modeled to capture specific features of linguistic structure of Portuguese, based on the formal model of description linguistic known as Context Free Grammar (CFG) Based on Features, with the purpose of demonstrate how the library of NLTK programs supports the implementation of parsers for analyzing the feature structure. For its stamp of language, it analyzes, according to X-bar Theory and the Minimalist Program, sentences in European and Brazilian variants of Portuguese, obtained from surveys in electronic corpora available on the web. And this work describes and discusses the category IP (inflectional phrase) within the hierarchical structure of constituents, according to the hypothesis of syntactic operation of visible and invisible movement of elements of language, specifically the movement of the verb
Esse trabalho possui um recorte teórico-metodológico que se decompõe em dois domínios complementares: o Linguístico e o Computacional/Implementacional. Pelo seu cunho computacional, o escopo primeiro desse trabalho está diretamente ligado ao processamento de língua natural (PLN). Desse modo, implementa-se uma análise sintática automática (parsing) de expressões de língua portuguesa em programas da biblioteca em Python do NLTK, cujas análises são representadas em forma de configurações arbóreas que demonstram categorias vazias de sentenças finitas do português. Ainda pelo cunho computacional, esse trabalho elabora um fragmento de gramática, modelado para capturar traços específicos da estrutura linguística do português, com base no modelo formal de descrição linguística conhecido como Gramática Livre de Contexto (CFG) Baseada em Traços, com a finalidade de demonstrar como a biblioteca de programas do NLTK dá suporte à realização dos analisadores sintáticos na análise da estrutura de traços. Pelo seu cunho lingüístico, analisa-se, de acordo com a Teoria X-barra e o Programa Minimalista, frases nas variantes europeia e brasileira da língua portuguesa, obtidas de pesquisas em corpora eletrônicos disponíveis na web. E ainda nesse trabalho, descreve-se e discute-se a categoria IP (sintagma flexional) dentro da sua estrutura hierárquica de constituintes, de acordo com a hipótese da operação sintática de movimento visível e não visível dos elementos linguísticos, especificamente o movimento do verbo
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Loy, Rodas Nicolas. "Context-aware radiation protection for the hybrid operating room." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD001/document.
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L’utilisation de systèmes d’imagerie à rayons X lors de chirurgies mini-invasives expose patients et staff médical à des radiations ionisantes. Même si les doses absorbées peuvent être faibles, l’exposition chronique peut causer des effets nocifs (e.g. cancer). Dans cette thèse, nous proposons des nouvelles méthodes pour améliorer la sécurité vis-à-vis des radiations ionisantes en salle opératoire hybride dans deux directions complémentaires. Premièrement, nous présentons des approches pour rendre les cliniciens plus conscients des irradiations grâce à des visualisations par réalité augmentée. Deuxièmement, nous proposons une méthode d'optimisation pour suggérer une pose de l’imageur réduisant la dose au personnel et patient, tout en conservant la qualité de l’image. Pour rendre ces applications possibles, des nouvelles approches pour la perception de la salle grâce à des caméras RGBD et pour la simulation en temps-réel de la propagation et doses de radiation ont aussi été proposéesThe use of X-ray imaging technologies during minimally-invasive procedures exposes both patients and medical staff to ionizing radiation. Even if the dose absorbed during a single procedure can be low, long-term exposure can lead to noxious effects (e.g. cancer). In this thesis, we therefore propose methods to improve the overall radiation safety in the hybrid operating room by acting in two complementary directions. First, we propose approaches to make clinicians more aware of exposure by providing in-situ visual feedback of the ongoing radiation dose by means of augmented reality. Second, we propose to act on the X-ray device positioning with an optimization approach for recommending an angulation reducing the dose deposited to both patient and staff, while maintaining the clinical quality of the outcome image. Both applications rely on approaches proposed to perceive the room using RGBD cameras and to simulate in real-time the propagation of radiation and the deposited dose
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Franco, Bruno Chaves. "Planejamento econômico de gráficos de controle X para monitoramento de processos autocorrelacionados /." Guaratinguetá : [s.n.], 2011. http://hdl.handle.net/11449/93084.
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Resumo: Esta pesquisa propõe o planejamento econômico de gráficos de controle ̅ para o monitoramento de uma característica de qualidade na qual as observações se ajustam a um modelo autorregressivo de primeira ordem com erro adicional. O modelo de custos de Duncan é usado para selecionar os parâmetros do gráfico, tamanho da amostra, intervalo de amostragem e os limites de controle. Utiliza-se o algoritmo genético na busca do custo mínimo de monitoramento. Para determinação do número médio de amostras até o sinal e o número de alarmes falsos são utilizadas Cadeias de Markov. Uma análise de sensibilidade mostrou que a autocorrelação provoca efeito adverso nos parâmetros do gráfico elevando seu custo de monitoramento e reduzindo sua eficiênciaAbstract: This research proposes an economic design of a ̅ control chart used to monitor a quality characteristic whose observations fit to a first-order autoregressive model with additional error. The Duncan's cost model is used to select the control chart parameters, namely the sample size, the sampling interval and the control limit coefficient, using genetic algorithm in order to search the minimum cost. The Markov chain is used to determine the average number of samples until the signal and the number of false alarms. A sensitivity analysis showed that the autocorrelation causes adverse effect on the parameters of the control chart increasing monitoring cost and reducing significantly their efficiency
Orientadora: Marcela Aparecida Guerreiro Machado
Coorientadora: Antonio Fernando Branco Costa
Banca: Fernando Augusto Silva Marins
Banca: Anderson Paula de Paiva
Mestre
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Waldstein, Seth William. "Compound Reconfigurable Dual-band Solid State Power Amplifier using a Single GaN HEMT for S and X-band Operations." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563874650458585.
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Grobost, Aline. "Pour une socio-anthropologie des secrets de famille : l'impact du mythe familial sur la socialisation de l'individu par la révélation d'un secret." Phd thesis, Université de Franche-Comté, 2012. http://tel.archives-ouvertes.fr/tel-00980792.
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Le premier secret de famille cité par les personnes interrogées par questionnaire est celui de la filiation. Les personnes nées dans le secret (ou nées sous X) sont destinataires d'un secret imposé par la législation, celui de leurs origines biologiques. Si de surcroît, cette adoption leur a été cachée par leur famille, comme c'est le cas des personnes rencontrées dans le cadre de cette recherche, la conséquence en est une souffrance d'autant plus violente que la révélation aura été tardive. Les loyautés familiales contraignent les membres à répéter événements familiaux et les contraignent à payer les fautes de leurs ancêtres. La famille vit enfermée dans un mythe familial qui prescrit les lois et règles à respecter.Aussi, après la révélation, la personne destinataire du secret va refuser ces lois et règles ; elle va être marginalisée par sa famille et le dialogue, voire toutes relations avec sa famille, seront rompus. Ainsi, elle s'est libérée des lois et règles prescrites par le mythe familial et de toute forme de loyauté vis-à-vis de sa famille. Cette exclusion va lui permettre de se socialiser. En effet, dans notre société, la transparence est le fer de lance et "l'extimité" est prônée. Le secret ne s'y oppose pas mais les complémente et la validation du secret est un soutien à la socialisation pour la personne
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Stahl, Katharina [Verfasser]. "Online anomaly detection for reconfigurable self-X real-time operating systems : a danger theory-inspired approach / Katharina Stahl." Paderborn : Universitätsbibliothek, 2016. http://d-nb.info/1102255106/34.
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Touchette, Michèle. "Artificial X-ray imaging system (AXIS) – design and evaluation on C-arm performance in operating room and educational settings." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61368.
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Fluoroscopic C-arms are operated by medical radiography technologists (MRTs) in Canadian operating rooms (ORs). Newly trained MRTs often experience most of their practical learning curve with C-arms in the OR, where achieving the radiographic views requested by surgeons can be challenging. New MRTs often require several scout X-rays during C-arm positioning, resulting in unnecessary radiation exposure and added OR time. To address this problem we have designed an Artificial X-ray Imaging System (AXIS) in order to assess the utility of artificial X-rays in improving the C-arm positioning performance by inexperienced users. AXIS is designed to generate Digitally Reconstructed Radiographs (DRRs), or artificial X-ray images, based on the relative position of a C-arm and manikin.
We enrolled 30 participants into our user study, each of whom performed four activities: an introduction session, an AXIS-guided evaluation, a non-AXIS-guided evaluation, and a questionnaire. The main goal of the study was to compare C-arm positioning performance with and without AXIS guidance. For each evaluation, the participants had to replicate a set of target X-ray images by taking real radiographs of the manikin with the C-arm. During the AXIS evaluation, artificial X-rays were generated at 2 Hz for guidance, while in the non-AXIS evaluation, the participants had to acquire real X-rays to guide them toward the correct view. We recorded the number of real X-rays and time required per task, as well as tracked the C-arm’s pose and compared it to the target pose to determine positioning accuracy.
We found that users required 53% fewer scout X-rays and achieved 10% better C-arm displacement accuracies when guided by AXIS, without requiring more time to complete the imaging tasks. From the questionnaires we found that, on average, participants felt significantly more confident in their ability to capture correct anatomical views when they were guided by AXIS. Moreover, the participants found the usefulness of AXIS in guiding them to the desired view to be ‘very good’. Overall, we are encouraged by these findings and plan to further develop this system with the goal of deploying it both for training and intraoperative uses.Applied Science, Faculty of
Graduate
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DeGrange, Walter C. "Optimizing global Combat Logistics Force support for Sea Base Operations /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FDeGrange.pdf.
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Bahmann, Helge. "A network transparent, retained mode multimedia processing framework for the Linux operating system environment." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2009. http://nbn-resolving.de/urn:nbn:de:bsz:105-967869.
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Die Arbeit präsentiert ein Multimedia-Framework für Linux, das im Unterschied zu früheren Arbeiten auf den Ideen "retained-mode processing" und "lazy evaluation" basiert: Statt Transformationen unmittelbar auszuführen, wird eine abstrakte Repräsentation aller Medienelemente aufgebaut. "renderer"-Treiber fungieren als Übersetzer, die diese Darstellung zur Laufzeit in konkrete Operationen umsetzen, wobei das Datenmodell zahlreiche Optimierungen zur Reduktion der Anzahl der Schritte oder der Minimierung von Kommunikation erlaubt. Dies erlaubt ein stark vereinfachtes Programmiermodell bei gleichzeitiger Effizienzsteigerung. "renderer"-Treiber können zur Ausführung von Transformationen den lokalen Prozessor verwenden, oder können die Operationen delegieren. In der Arbeit wird eine Erweiterung des X Window Systems um Mechanismen zur Medienverarbeitung vorgestellt, sowie ein "renderer"-Treiber, der diese zur Delegation der Verarbeitung nutzt.
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Steele, Alasdair. "Investigating the quasiparticle dynamics operating in the electrodes of superconducting tunnel junctions using nanosecond phonon pulses." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369498.
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Rehn, Emelie. "Modeling of scatter radiation during interventional X-ray procedures." Thesis, Linköpings universitet, Avdelningen för radiologiska vetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119694.
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During catheterized x-ray interventions the patient and medical staff is exposed to scatter radiation, as a consequence of tissue interactions. Ionizing radiation for medical purpose is potentially dangerous and can cause malignancy, skin damage and more. Studies have suggested an increase in the prevalence of eye lens cataract, thyroid cancer and left sided brain tumors in doctors. Therefore, it is mandatory to reduce the radiation dose in medicine, a principle known as ALARA (as low as Reasonably Achievable). Lead aprons, collars and shieldings are safety precautions to protect the team in the operating room. The x-ray equipment and surgical techniques are constantly evolving and the interventions become more complex which may increase the x-ray dose. Although x-ray imaging is required in interventional procedures endeavors of reducing radiation exposure to staff is of high interest. There is a need to increase the awareness about scatter radiation and radiation protection efforts are gaining momentum. Initiative to train a dose reducing behavior by education and awareness are key documents within the European Union’s guidelines on Radiation protection. The aims of this thesis were to create a 3D model for representation of real-time exposure and accumulated scatter radiation to staff performing interventional x-ray procedures and identify parameters that affect the scatter radiation. Extensive measurements were made with real time dosimeters while irradiating an anthropomorphic phantom. For five lateral C-arm projections, 68 - 80 data points each were used to measure scatter dose distribution around the patient. In the typical operator position, the effect of craniocaudal projection angle, patient size, field size, image detector height and pulse rate on scatter radiation dose was also investigated. It was possible to create a 3D model from interpolated measurement data that can generate dose rate with promising results. Six out of eight modelled doses deviated +/- 26.6 % from the validation cases. A model that delivers relative dose is an intuitive approach in education for interventional x-ray radiation safety. The staff position in relation to the x-ray source and the patient size have a significant correlation to the dose rate. Additional measurements are needed to ensure the reliability of the model. This work completes the effect of scatter radiation distribution around the patient table, which is not yet evaluated as thoroughly by other authors.
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Ender, Jörg [Verfasser], Udo X. [Akademischer Betreuer] Kaisers, Manfred [Gutachter] Seeberger, and Hans [Gutachter] Gombotz. "Die Rolle der intraoperativen Echokardiographie bei herzchirurgischen Operationen mit Schwerpunkt Mitralklappenrekonstruktion / Jörg Ender ; Gutachter: Manfred Seeberger, Hans Gombotz ; Betreuer: Udo X. Kaisers." Leipzig : Universitätsbibliothek Leipzig, 2012. http://d-nb.info/1238241107/34.
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Campos, Avendaño Gustavo Andrés. "Caracterización y optimización de los gráficos X-RL2 para el control de la posición y S-RL2 para el control de la dispersión." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/16467.
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En el entorno productivo y de manufactura, el control estadístico de procesos (SPC) es una herramienta ampliamente utilizada para mantener la calidad del producto fabricado. Dentro del SPC, los gráficos de control han sido objeto de innumerables investigaciones, todas ellas encaminadas a aumentar el desempeño de los mismos. Esto es debido a que los clásicos gráficos de control X� de Shewhart y S de Shewhart, aunque de uso muy extendido, presentan la desventaja de su poca efectividad para detectar cambios pequeños o moderados en la media y en la desviación del proceso respectivamente.
Para intentar mitigar dicha dificultad, diferentes autores han planteado numerosas alternativas a los mencionados gráficos de control. Entre las más destacadas se encuentran los gráficos con reglas adicionales, gráficos EWMA, gráficos CUSUM, gráficos con tamaño de muestra e intervalo de muestreo variable, gráficos sintéticos, etc.
En la presente tesis doctoral se estudian, caracterizan y optimizan dos nuevos gráficos de control. El primero es el gráfico de control denominado X� -RL2 que combina un gráfico de control X� de Shewhart con un gráfico RL2. El segundo es el gráfico de control S-RL2 que combina el gráfico S de Shewhart con un gráfico RL2. Con los nuevos gráficos desarrollados se mejora el desempeño de los clásicos gráficos X� y S propuestos por el doctor Walter Shewhart para ciertos tamaños de muestra y magnitudes de cambio de diseño establecidos. De igual manera, tanto el gráfico de control X� -RL2 como el S-RL2 presentan un desempeño superior a los gráficos sintéticos para ciertos parámetros de diseño.
Adicionalmente, el desempeño de los gráficos de control X� -RL2 es comparado con la de los gráficos con reglas adicionales, gráficos CUSUM y EWMA. Igualmente, el desempeño del gráfico S-RL2 es comparado con la de los gráficos CUSUM S y EWMA S, con resultados ventajosos en algunos casos.
Todas las comparaciones se realizaron en el escenario zero-state usando la métrica del ARLCampos Avendaño, GA. (2012). Caracterización y optimización de los gráficos X-RL2 para el control de la posición y S-RL2 para el control de la dispersión [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/16467
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Fleute, Markus. "Shape reconstruction for computer assisted surgery based on non-rigid registration of statistical models with intra-operative point data and X-ray images." Université Joseph Fourier (Grenoble), 2001. http://tel.archives-ouvertes.fr/tel-00005365.
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L'objectif de cette thèse est la reconstruction de surfaces anatomiques à partir d'un nombre restreint de radiographies et de points acquis en phase per-operatoire. L'approche propos'ee repose sur une mise en correspondance des donn'ees avec un modèle d'eformable statistique afin d'incorporer de la connaissance à priori sur la forme de l'objet à reconstruire. L''elaboration d'un tel modèle statistique n'ecessite l'analyse de forme dans une population donn'ee. Pour cette analyse un modèle g'en'erique de l'objet est utilis'e afin d'effectuer simultan'ement la segmentation des structures et la mise en correspondance de points appari'es dans un ensemble d'examens tomodensitom'etriques. La reconstruction à partir d'un nuage de points est effectu'ee par une m'ethode de recalage 3D/3D non rigide. L'application de cette technique d'interpolation et d'extrapolation de donn'ees incomplètes est montr'ee dans un système pour la reconstruction du ligament crois'e ant'erieur. Pour la reconstruction à partir de radiographies une m'ethode de recalage 3D/2D non rigide est propos'ee afin de mettre en correspondance le modèle statistique avec les contours de l'objet segment'e dans les radiographies calibr'ees. Des exp'erimentations ont 'et'e effectu'ees avec un modèle statistique de vertèbres lombaires, en vue de l'application clinique du vissage p'ediculaire. De plus il est montr'e que la mise en correspondance hybride combinant le recalage 3D/3D et le recalage D/2D pourrait être une option int'eressante pour certaines applications dans le domaine des Gestes M'edicaux Chirurgicaux Assist'es par OrdinateurThis thesis addresses the problem of reconstructing 3D anatomical surfaces based on intra-operatively acquired sparse scattered point data and few calibrated X-ray images. The approach consists in matching the data with a statistical deformable shape model thus incorporating a priori knowledge into the reconstruction process (. . ) It is further shown that hybrid matching combining both, 3D/3D and 3D/2D registration, might be an interesting option for certain Computer Assisted Surgery Applications
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Jones, Laurita M. "Strategies for Retaining a Multigenerational Workforce." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/3789.
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As organizations become more age diverse, some business leaders face challenges managing a multigenerational workforce. The purpose of this single case study was to explore strategies that leaders at a university in Northwest Florida implemented to retain their age-diverse workforce. The targeted population was higher education business managers who had success with retaining an age-diverse staff. The conceptual framework of the study was Herzberg's 2-factor theory of motivation. A significant tenet of this theory is that employees explain satisfying and dissatisfying experiences based on intrinsic and extrinsic factors related to their job functions. The data collection process included face-to-face interviews with 4 participants and a review of company documents, including the university's strategic plan and diversity and inclusion initiatives. Through coding and thematic analysis, 7 themes emerged that could help leaders retain a multigenerational workforce: foster a diversity-friendly workplace culture, implement effective interpersonal communication strategies, employ a formal approach, encourage a healthy work-life balance, value employees and their differences, offer professional growth opportunities, and eliminate negative generational stereotyping. Developing and cultivating retention strategies may contribute to social change by helping managers and leaders enrich retention rates, thereby increasing employment stability, improving productivity, and enhancing organizational and community relations.
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Benegas, Jayme Diego. "Evaluation of the Hybrid-Electric Aircraft Project Airbus E-Fan X." Master's thesis, Aircraft Design and Systems Group (AERO), Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences, 2019. http://d-nb.info/1204685894.
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Purpose - This master thesis evaluates the hybrid-electric aircraft project E-Fan X with respect to its economical and environmental performance in comparison to its reference aircraft, the BAe 146-100. The E-Fan X is replacing one of the four jet engines of the reference aircraft by an electric motor and a fan. A turboshaft engine in the cargo compartment drives a generator to power the electric motor. --- Methodology - The evaluation of this project is based on standard aircraft design equations. Economics are based on Direct Operating Costs (DOC), which are calculated with the method of the Association of European Airlines (AEA) from 1989, inflated to 2019 values. Environmental impact is assessed based on local air quality (NOx, Ozone and Particulate Matter), climate impact (CO2, NOx, Aircraft-Induced Cloudiness known as AIC) and noise pollution estimated with fundamental acoustic equations. --- Findings - The battery on board the E-Fan X it is not necessary. In order to improve the proposed design, the battery was eliminated. Nevertheless, due to additional parts required in the new configuration, the aircraft is 902 kg heavier. The turboshaft engine saves only 59 kg of fuel. The additional mass has to be compensated by a payload reduced by 9 passengers. The DOC per seat-mile are up by more than 10% and equivalent CO2 per seat-mile are more than 16% up in the new aircraft. --- Research limitations - Results are limited in accuracy by the underlying standard aircraft design calculations. The results are also limited in accuracy by the lack of knowledge of some data of the project. --- Practical implications - The report contributes arguments to the discussion about electric flight. --- Social implications - Results show that unconditional praise given to the environmental characteristics of this industry project are not justified.
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Brown-Crowder, Rhonda Rochelle. "Work Motivation Theory: Identifying Multi-Generational Values in the Workplace." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/4043.
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The workforce is diverse on gender, race, ethnicity, culture, work styles, and age. Employees from different generations have varying expectations of what they value from the workplace and therefore approach work differently. Generational differences can lead to mistrust and communication breakdowns. They can also impact job satisfaction and productivity. The Generational Cohort Theory was utilized in this nonexperimental study, and the sample was recruited from CB Richard Ellis Real Estate Group. The purpose of this study was to determine the work values differences among the 4 generational cohorts: Silent, Baby Boomers, Generation X and Millennials. The research questions for this quantitative study first identified the preferred work values, utilizing the Minnesota Importance Questionnaire (MIQ), and sought if there was a statistically significant means difference in those preferred values from 1 generation to another. A 1-way MANOVA was used to analyze the effect of generation cohort affiliation with preferred work values, revealing a positive relationship between cohort and preferred work values. Results indicated that some work values are unique between generations, such as being busy all the time and doing things for other people, and some are shared, including telling people what to do and having good coworkers. Additional research is needed to address the gap in current literature in the areas of autonomy and recognition. The implications for social change include acquiring a greater knowledge of similarities and differences between older and younger workers.. This knowledge is essential for building high-performing teams, for successful recruitment, and employee retention.
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Borges, Caroline Dellinghausen. "Estudo das condições operacionais na produção de xan-tana por X. arboricola pv pruni para aplicação em fluido de perfuração de poços de petróleo." Universidade Federal de Pelotas, 2007. http://guaiaca.ufpel.edu.br/handle/123456789/1248.
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Previous issue date: 2007-10-16Xanthan yield and physical and chemical characteristics can be improved by modification in culture conditions, as well as, by post-fermentation treatments in order to obtain a xanthan with the required characteristics. The aim of this work was to study the operational conditions in xanthan production by Xanthomonas arborícola pv pruni strains 106 and 115 to be used in oilwell drilling fluids. The influence of thermal treatment applied to the fermentation broth was evaluated in the xanthan produced by strain 106 in a range of pH and stirrer speed. The thermal treatment decreased the yield between 5.8 and 14%, nevertheless, was observed increase of aqueous solution and fermentation broth viscosities. The aggregation of xanthan molecules caused by thermal treatment and determined by increase of molar mass was dependent on the sodium content. As a result, a correlation between molar mass and xanthan solution viscosity can be observed. The fermentation broth sterilization was adopted for experiment in which a pre-selection of production medium in orbital shaker was performed for subsequent pH, production medium and stirrer speed study in fermentor by strains 106 and 115. Xanthan production and viscosity was dependent on the strain of X. arborícola pv pruni and on the operational condition used. The production medium B showed the best balance of yield and viscosity results, in orbital shaker, as well as in fermentor. The best results for both strains were obtained at pH 7, 600 rpm and 66 h of fermentation. The two strains showed potential for xanthan production. In an evaluation study of, physical and chemical characteristics, the xanthan produced by strain 115 was compared to the characteristics of the commercial xanthans, Roeper and Kelzan. The former is for application in food, pharmeceutical products and cosmetics and the latter for application in oilwell drilling fluids. The results were within the literature specified patterns, except by the low piruvate content of xanthan produced by strain 115, low monovalent salt content of Roeper sample and high divalent salt content of both commercial samples. The xanthans produced by X. arborícola pv pruni were evaluated as viscosifying fluid for use in oilwell drilling, in comparison to Duo Vis, Kelzan and Xanvis commercial brands. As a whole, the results obtained in this study show that the commercial polymers are more efficient when used in aqueous solution, since these polymers contain high salt concentrations. Xanthans produced by patovar pruni, Xc 106 600 and Xc 115 600, as having low salt concentration, they show potential for application in oilwell drilling fluid, when a salt solution was used, similar to the conditions of marine exploration.
O rendimento e as características físicas e químicas da xantana podem ser melhorados através das modificações nas condições de cultivo, assim como, por tratamentos empregados após a fermentação, para a obtenção de uma xantana com características desejadas para o fim que se propõe. O trabalho objetivou estudar as condições operacionais de produção de xantana por Xanthomonas arboricola pv pruni cepas 106 e 115 para aplicação em fluidos de perfuração de poços de petróleo. A influência do tratamento térmico aplicado no caldo fermentado foi avaliada na xantana produzida pela cepa 106 em diferentes condições de pH e velocidade de agitação. O tratamento térmico reduziu o rendimento entre 5,8 e 14%, entretanto, foi observado o aumento da viscosidade da solução aquosa e do caldo fermentado. A agregação de moléculas de xantana provocada pelo tratamento térmico, e comprovada pelo aumento da massa molar foi dependente da concentração de sódio. Como resultado pode ser observada relação entre a massa molar e a viscosidade da solução de xantana. A esterilização do caldo fermentado foi adotada para o experimento posterior, em que foi realizada uma pré-seleção de meios de produção, em agitador incubador, para posterior estudo de pH, meio de produção e velocidade de agitação em fermentador pelas cepas 106 e 115. A produção e a viscosidade das xantanas sintetizadas foram dependentes da cepa de X. arboricola pv pruni e das condições operacionais. O meio de produção B apresentou o melhor equilíbrio entre produção e viscosidade, em agitador incubador, assim como no fermentador. Os melhores resultados para ambas as cepas foram obtidos em pH 7, 600 rpm e 66 h de fermentação. As duas cepas apresentaram potencial para serem utilizadas na produção de xantana. No estudo da avaliação das características físicas e químicas, a xantana produzida pela cepa 115 foi comparada as características das xantanas comerciais, Roeper e Kelzan. A primeira, para aplicação em alimentos, produtos farmacêuticos e cosméticos e a segunda, para aplicação em fluido de perfuração de poços de petróleo. Os resultados apresentaram-se dentro dos padrões especificados pela literatura, exceto pelo baixo conteúdo de piruvato da xantana produzida pela cepa 115, baixo conteúdo de sais monovalentes da amostra Roeper e alto conteúdo de sais divalentes das duas amostras comerciais. As xantanas produzidas por X. arboricola pv pruni foram avaliadas como viscosificante de fluido para aplicação na perfuração de poços de petróleo, comparando-as com amostras comerciais: Duo Vis, Kelzan e Xanvis. De uma forma geral, os resultados obtidos neste estudo mostram que os polímeros comerciais apresentaram maior eficiência quando preparados em solução aquosa, pois estes polímeros continham alta concentração de sais. Já as xantanas produzidas pelo patovar pruni, Xc 106 600 e Xc 115 600, por apresentarem baixa concentração de sais, apresentaram potencial para aplicação em fluido de perfuração de poços de petróleo, quando preparados em solução salina, condição semelhante a utilizada na exploração marítima.
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Colson, Louis. "Conception et réalisation d'un dosimètre opérationnel pour la chirurgie interventionnelle assistée par radioscopie X." Thesis, Normandie, 2021. http://www.theses.fr/2021NORMC208.
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Cette thèse concerne la conception d’un dosimètre opérationnel pour les chirurgiens opérant sous rayonnement X. Les rayons X ont été découverts en 1895 par Wilhelm Röntgen. Depuis, ils sont très largement employés que ce soit pour les contrôles effectués dans les aéroports ou dans le domaine médical. Très utiles pour soigner les personnes, ils ne sont pas sans danger que ce soit pour les patients ou les praticiens hospitaliers. Normalement, les patients sont soumis de manière ponctuelle à des irradiations. En revanche, certains praticiens hospitaliers sont confrontés aux irradiations au quotidien. On distingue ici, les personnels orientés « radiographie », qui sont normalement protégés lors de l’irradiation du patient, de certains chirurgiens qui utilisent les rayons X comme moyen de contrôle durant l’opération et pour laquelle ils sont à proximité de la zone irradiée. C’est à cette problématique que s’intéresse cette thèse. L’étude que nous proposons en partenariat avec le laboratoire de recherche en science du numérique GREYC et l’Ecole des Applications Militaires de l’Energie Atomique (EAMEA) située à Cherbourg, est donc destinée à concevoir et réaliser un détecteur de rayons X pour applications médicales visant à donner une information pour une faible dose et des faibles énergies. La partie simulation et validation (irradiation) s’est faite à l’EAMEA. Le reste du travail s’est déroulé au sein du laboratoire GREYC qui a acquis, depuis plusieurs années, une réelle expérience dans le domaine des capteurs.Pour cela, nous avons commencé par réaliser des simulations Monte-Carlo à l’aide du code de calcul GEANT4 afin de définir la géométrie optimale du détecteur. A la suite de ces résultats de simulation, nous avons réalisé le capteur par pulvérisation cathodique rf magnétron par dépôt successif de couches minces. La couche sensible du capteur a fait l’objet d’une caractérisation Raman dont les résultats sont comparés à la littérature. Une fois le capteur réalisé, nous avons procédé à une caractérisation sous un flux de rayonnement X émis depuis un générateur continu de rayons X. Les différents essais avec le générateur continu ont permis de développer une chaine d’acquisition du signal pour ensuite tester le capteur sous un champ de rayonnement pulsé au Centre Hospitalier Public du CotentinThis thesis concerns the design of an operational dosimeter for surgeons operating under X-rays. X-rays were discovered in 1895 by Wilhelm Röntgen. Since then, they have been very employed, whether for checks carried out at airports or in the medical field. Very useful for treating people, they are not without danger whether it is for patients or hospital practitioners. Normally, patients are subjected occasionally to irradiation. On the other hand, some hospital practitioners are confronted with daily irradiation. A distinction is made here between “radiography” for diagnostic, who are normally protected during irradiation of the patient, and certain surgeons who use X-rays as a control during the operation and for whom they are close to the irradiated area. This is the issue that this thesis is interested in. The study that we are proposing in partnership with the digital science research laboratory GREYC and the School of Military Applications of Atomic Energy (EAMEA) both located in Cherbourg, is therefore intended to design and produce an X-ray detector for medical applications aimed at giving information for low dose and low energies. The simulation and validation (irradiation)part was done at EAMEA. The rest of the work took place within the GREYC laboratory which has acquired, for several years, real experience in the field of sensors.We started by performing Monte-Carlo simulations using the GEANT4 calculation code in order to define the optimal geometry of the sensor. Following these simulation results, we produced the sensor by rf magnetron sputtering by successive deposition of thin layers. The sensitive layer of the sensor was subject to Raman characterization, the results of which were compared with the literature. Once the sensor had been produced, we carried out a characterization under a flow of X-rays emitted from a continuous X-ray generator. The various tests with the generator continued made it possible to develop a signal acquisition chain in order to test the sensor under a pulsed radiation field in the Centre Hospitalier Public du Cotentin
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Rough, Justin, and mikewood@deakin edu au. "A Platform for reliable computing on clusters using group communications." Deakin University. School of Computing and Mathematics, 2001. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20060412.141015.
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Shared clusters represent an excellent platform for the execution of parallel applications given their low price/performance ratio and the presence of cluster infrastructure in many organisations. The focus of recent research efforts are on parallelism management, transport and efficient access to resources, and making clusters easy to use. In this thesis, we examine reliable parallel computing on clusters. The aim of this research is to demonstrate the feasibility of developing an operating system facility providing transport fault tolerance using existing, enhanced and newly built operating system services for supporting parallel applications. In particular, we use existing process duplication and process migration services, and synthesise a group communications facility for use in a transparent checkpointing facility. This research is carried out using the methods of experimental computer science.
To provide a foundation for the synthesis of the group communications and checkpointing facilities, we survey and review related work in both fields. For group communications, we examine the V Distributed System, the x-kernel and Psync, the ISIS Toolkit, and Horus. We identify a need for services that consider the placement of processes on computers in the cluster. For Checkpointing, we examine Manetho, KeyKOS, libckpt, and Diskless Checkpointing. We observe the use of remote computer memories for storing checkpoints, and the use of copy-on-write mechanisms to reduce the time to create a checkpoint of a process.
We propose a group communications facility providing two sets of services: user-oriented services and system-oriented services. User-oriented services provide transparency and target application. System-oriented services supplement the user-oriented services for supporting other operating systems services and do not provide transparency. Additional flexibility is achieved by providing delivery and ordering semantics independently.
An operating system facility providing transparent checkpointing is synthesised using coordinated checkpointing. To ensure a consistent set of checkpoints are generated by the facility, instead of blindly blocking the processes of a parallel application, only non-deterministic events are blocked. This allows the processes of the parallel application to continue execution during the checkpoint operation. Checkpoints are created by adapting process duplication mechanisms, and checkpoint data is transferred to remote computer memories and disk for storage using the mechanisms of process migration. The services of the group communications facility are used to coordinate the checkpoint operation, and to transport checkpoint data to remote computer memories and disk.
Both the group communications facility and the checkpointing facility have been implemented in the GENESIS cluster operating system and provide proof-of-concept. GENESIS uses a microkernel and client-server based operating system architecture, and is demonstrated to provide an appropriate environment for the development of these facilities.
We design a number of experiments to test the performance of both the group communications facility and checkpointing facility, and to provide proof-of-performance. We present our approach to testing, the challenges raised in testing the facilities, and how we overcome them. For group communications, we examine the performance of a number of delivery semantics. Good speed-ups are observed and system-oriented group communication services are shown to provide significant performance advantages over user-oriented semantics in the presence of packet loss. For checkpointing, we examine the scalability of the facility given different levels of resource usage and a variable number of computers. Low overheads are observed for checkpointing a parallel application.
It is made clear by this research that the microkernel and client-server based cluster operating system provide an ideal environment for the development of a high performance group communications facility and a transparent checkpointing facility for generating a platform for reliable parallel computing on clusters.
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Deligne, Eddy. "Hyperviseur de protection d'exécutables - Etude, développement et discussion." Phd thesis, Ecole Polytechnique X, 2014. http://pastel.archives-ouvertes.fr/pastel-00976713.
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Pour garantir la pérennité de l'entreprise, celle-ci doit souvent chercher des contrats à l'export. Dans le domaine de la Défense, ces contrats s'accompagnent souvent de transferts de technologie (ToT) vers le pays acquéreur. Ceux-ci sont partiels et un compromis est nécessaire entre la protection de la propriété industrielle, celle du secret national et les demandes du client. C'est dans ce contexte, et notamment au sein de DCNS que nous cherchons de nouvelles techniques de protection logicielles. Face aux échecs des différentes techniques de protections actuelles (obfuscations et packer) qui ne proposent que de ralentir la compréhension des données, une nouvelle approche de protection est envisagée. L'idée principale est de filtrer les accès mémoires des données identifiées comme sensibles. Cette solution, qui s'inscrit dans un environnement industriel défini (architecture Intel et système d'exploitation Linux), doit impacter au minimum le système et les applications fournis par DCNS. Nous proposons une architecture qui s'appuie sur les dernières technologies Intel et particulièrement sur la virtualisation matérielle. Celle-ci nous permet d'obtenir un haut niveau de privilège et de contrôler finement les applications. Notre solution permet de protéger les données exécutables des binaires de type ELF, dans les architectures 32 et 64 bits, sans modification du système cible. Nous détaillons les différentes étapes pour protéger l'exécution d'un processus (du chargement à son arrêt) ainsi que les problèmes rencontrés et les choix pour y remédier. Nous montrons également, à travers différentes mesures, l'efficacité d'une telle architecture et son faible impact sur les performances globales. Dans notre implémentation, seules les données exécutables sont protégées, nous proposons donc des pistes d'améliorations pour couvrir la totalité du binaire en mémoire. Et nous étudions les évolutions possibles pour intégrer notre protection dans une architecture de confiance et ainsi, renforcer sa persistance face aux attaques. Notre solution permet donc par construction d'interdire toutes les lectures et écritures des données exécutables sensibles et s'adapte à tous les systèmes d'exploitation Linux sans aucune modification du système.
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Iden, Ronald Lee. "Strategies for Managing a Multigenerational Workforce." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2087.
Full textAbstract:
The multigenerational workforce presents a critical challenge for business managers, and each generation has different expectations. A human resource management study of organizations with more than 500 employees reported 58% of the managers experiencing conflict between younger and older workers. The purpose of this single case study was to explore the multigenerational strategies used by 3 managers from a Franklin County, Ohio manufacturing facility with a population size of 6 participants. The conceptual framework for this study was built upon generational theory and cohort group theory. The data were collected through face-to-face semistructured interviews, company documents, and a reflexive journal. Member checking was completed to strengthen the credibility and trustworthiness of the interpretation of participants' responses. A modified van Kaam method enabled separation of themes following the coding of data. Four themes emerged from the data: (a) required multigenerational managerial skills, (b) generational cohort differences, (c) most effective multigenerational management strategies, and (d) least effective multigenerational management strategies. Findings from this study may contribute to social change through better understanding, acceptance, and appreciation of the primary generations in the workforce, and, in turn, improve community relationships.