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Thematische Bibliographien / System collapse / Dissertationen

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Dissertationen zum Thema „System collapse“

Autor: Grafiati

Veröffentlicht am 24. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Al-Ashwal, Natheer Ali Mohammed. "Power system oscillatory instability and collapse prediction." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/power-system-oscillatory-instability-and-collapse-prediction(18ffc3fa-9b1b-40c6-b614-d757eb641046).html.

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This thesis investigates the capabilities of the Collapse Prediction Relay (CPR-D) and also investigates the use of system identification for detection of oscillatory instability. Both the CPR-D and system identification are based on system measurements and do not require modelling of the power system. Measurement based stability monitors can help to avoid instability and blackouts, in cases where the available system model can not predict instability. The CPR-D uses frequency patterns in voltage oscillation to detect system instability. The relay is based on non-linear dynamics Theory. If a c

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Marticello, Daniel Nicholas Jr. "Complexity within the Air Force acquisition system gaining insight from a theory of collapse." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70825.

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Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 122-129).<br>Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both the societal level and the organizational level are reviewed. Tainter's interrelationship between increasing system complexity and diminishing marginal returns

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CARLESSO, MATTEO. "Open Quantum System dynamics: Applications to Decoherence and Collapse models." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2917550.

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Quantum mechanics exhibits a broad collection of theoretical results in complete agreement with experimental evidence. Besides showing unquestionable success in the description of isolated systems, it can be also successfully used to characterize non-isolated quantum system. In such a case, phenomena like dissipation, diffusion or decoherence. The theory of open quantum systems provides the framework where such features can be conveniently explained. This thesis is about decoherence and collapse models. Albeit conceptually they are very far from each other, they both belong the framework of o

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JONES, CAITLIN ISOBEL. "Special Relativity and Spontaneous Collapse Models." Doctoral thesis, Università degli Studi di Trieste, 2021. http://hdl.handle.net/11368/2995656.

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The work of this PhD investigates spontaneous collapse models, which are a proposed modification of quantum mechanics and their consistency with special relativity. Since soon after they were first proposed there have been many attempts to construct a relativistic collapse model, but currently there is not a satisfactory model. This thesis considers what it means for an irreversible dynamics to be consistent with special relativity and reviews the existing proposals and their issues. The key results are a demonstration of why a relativistic point-like collapse model is not possible and that

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Ambrus, Marcel. "How long does it take until a quantum system reemerges after gravitational collapse? /." [S.l.] : [s.n.], 2004. http://www.zb.unibe.ch/download/eldiss/04ambrus_m.pdf.

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Manona, Cecil W., and presented at an ISER Seminar March 1995 Paper. "The collapse of the 'tribal authority' system and the rise of civic organisations." Rhodes University, Institute of Social and Economic Research, 1995. http://hdl.handle.net/10962/2454.

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The paper examines the performance of a local ('tribal') authority which existed in the Keiskammahoek district up to 1993 and accounts for the rise of civic organisations which challenged tribal authorities virtually everywhere in the former Ciskei. It suggests that the problems of this local authority which included inefficiency, corruption and lack of democracy were manifestations of the limitations of the Black Authorities Act of 1951 which attempted to revive traditional authority in the rural areas in south Africa even though this was incompatible with political developments in many other

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Gotoda, Takeshi. "Anomalous enstrophy dissipation via triple collapse of point vortices in a Euler-Poincare system." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225379.

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8

Rasch, Sebastian [Verfasser]. "Resilience, collapse and reorganization of a rangeland socio-ecological system in South Africa / Sebastian Rasch." Bonn : Universitäts- und Landesbibliothek Bonn, 2016. http://d-nb.info/1107541727/34.

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9

Beeravolu, Nagendrakumar. "Predicting Voltage Abnormality Using Power System Dynamics." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1722.

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The purpose of this dissertation is to analyze dynamic behavior of a stressed power system and to correlate the dynamic responses to a near future system voltage abnormality. It is postulated that the dynamic response of a stressed power system in a short period of time-in seconds-contains sufficient information that will allow prediction of voltage abnormality in future time-in minutes. The PSSE dynamics simulator is used to study the dynamics of the IEEE 39 Bus equivalent test system. To correlate dynamic behavior to system voltage abnormality, this research utilizes two different pattern re

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Di, Palma Debora. "Progressive collapse of concrete structures during construction phase: analysis and measures for risk reduction." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Shoring systems are used as temporary support for structures under construction and their primary function is to support and transmit various types of loads. To optimize this phase it has been developed a technique known as Clearing or partial Striking; it consists in removing a percentage of shores few days after the casting such that the load is redistributed between the slab and the remaining shores. In this way the shores removed in one floor can be used to start building the upper one. It is thus really important to conceive the process in a proper way assuring that the whole system is ab

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Dyanat, Mohsen. "The emergence of the new subordinate system in southwest and central Asia after the collapse of the USSR." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284621.

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Kuraev, Alexey. "Internationalization of Higher Education in Russia: Collapse or Perpetuation of the Soviet System? A Historical and Conceptual Study." Thesis, Boston College, 2014. http://hdl.handle.net/2345/3799.

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Thesis advisor: Philip G. Altbach<br>This study traces the policy and implementation of internationalization in the Russian higher education system from 1917 to the present. The analysis suggests that international academic policy has been applied by the Russian state continuously, though with radically differing emphasis and mechanisms, through the last hundred years. Chapter One presents the research questions, design and methodology of the study. Chapter Two reviews scholarly literature related to academic internationalization and situates this definition within the context of Russian highe

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Pendar, Hodjat. "The mechanical linkage of abdominal movements and the respiratory system in beetles." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/72865.

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Abdominal pumping is a well-known behavior in insects, thought to function largely in respiratory processes. In particular, the abdominal pump is considered to produce ventilation of air in the tracheal system, but the mechanistic link between abdominal movement and flow of air is not well understood. In this thesis, we explore the relationship between the abdominal pump and ventilation of air using pupal and adult forms of the darkling beetle Zophobas morio. First, we investigated the mechanical linkage between abdominal pumping and active ventilation in pupae by simultaneously measuring a

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Olajubutu, Michael Olaolu. "Utilizing microprocessor based relays as predictive tools to mitigate voltage instability problems that stem from the fast voltage collapse and delayed voltage recovery phenomena." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/OLAJUBUTU_MICHAEL_35.pdf.

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15

Motono, Eiichi. "Chinese-British commercial conflicts in Shanghai and the collapse of the merchant-control system in late Qing China, 1860-1906." Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:27ae2da8-a15b-40e1-a0b2-bc33fc8ecbaa.

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During the 1860s, Chinese merchants reestablished their commercial organizations which are recorded as Guilds (hanghui) in the sources compiled under the guidance of the Qing local government officials. From the decade until the end of the 1880s, English sources emphasized the solidarity of the commercial organizations of Chinese merchants and their superiority to the British mercantile community in the commercial conflicts in which they were engaged. However, from the 1890s, English sources ceased to complain the strength of the commercial organizations of Chinese merchants, and, at the same

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Flores, Solano Francisco Xavier. "Influence of the Gravity System on the Seismic Performance of Special Steel Moment Frames." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73143.

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This study investigates the influence of the gravity load resisting system on the collapse performance of Special Steel Moment Frames (SMFs). The influence was quantified using the FEMA P-695 methodology. The buildings used for this study were a 2-, 4- and 8-story SMFs taken from the ATC76-1 project where their collapse performance was already evaluated without the gravity system. The main work of this dissertation has been divided in two parts. The first part studies the influence of the gravity system when it is incorporated explicitly as part of the lateral resisting system. Aspects of the

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Pavlick, Bay. "A fuzzy logic based controller to provide end-to-end congestion control for streaming media applications." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001253.

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18

Alkema, Nike Kristin. "A historical institutionalist explanation for the party change : the contingent collapse of the Democrazia Cristiana and the path dependent political diaspora of Catholics in the Italian party system." Thesis, University of Oxford, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543732.

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Guimarães, Márcia Barbosa da Costa. "A ocupação pré-colonial da região dos Lagos, RJ: sistema de assentamento e relações intersocietais entre grupos sambaquianos e grupos ceramistas Tupinambá e da tradição Una." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/71/71131/tde-05092007-111015/.

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A pesquisa teve por objetivo compreender o sistema de assentamento dos grupos sambaquianos que ocuparam o Complexo Lagunar de Saquarema entre 6.600-1.500 anos cal BP. Tendo por base o pressuposto de que o estudo da continuidade e da mudança é fundamental para o desenvolvimento de estudos regionais, foi construído um modelo onde dois fatores, mudança ambiental e contato intersocietal, influenciaram o processo de transformação sociocultural verificado entre os grupos sambaquianos. Assim, embora partilhassem traços comuns, o que lhes permitia manter um caráter identitário - podendo esse ser vislu

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Knutsson, Elias. "Drones – a tool of escalation or de-escalation in conflicts?" Thesis, Försvarshögskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-9985.

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The use of drones in conflicts is under development and is increasing rapidly. The first real drone warfare was seen in Pakistan in the War on Terrorism in 2004. Between officials and scientists, there are divided opinions about whether the drone strikes can increase terrorism or cause the collapse of organizations. The purpose of this thesis is to examine how the effectiveness of drones, in terms of precision and lethality, can be seen to escalate or de-escalate a conflict. The aim is to explore whether two existing theories about air power can explain the case of killing the Iranian general,

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Hagerfors, Erika, and Emelie Lagrosen. "Riskanalyskartor i GIS över tsunamidrabbade områden vid ett skredscenario av vulkanen Cumbre Vieja på La Palma, Kanarieöarna." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-296215.

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På Kanarieön La Palma finns sprickzonen och vulkanen Cumbre Vieja. Under ett vulkanutbrott år 1949 bildades ett förkastningssystem längs vulkanens västra sida som skulle kunna vara ett förstadium till en framtida kollaps av vulkanen. Denna kollaps skulle kunna leda till bildandet av en tsunami när kollapsmaterial rasar ner i havet likt ett jordskred. Tsunamin kan komma att spridas över stora delar av Atlanten och i olika grad påverka de omkringliggande kontinenterna. Det finns olika teorier om hur stort jordskredet kommer att bli och om det kommer att ske successivt eller kollapsa som en enda

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Cao, Ngoc-Tuyen. "Apport de la Surveillance Microsismique en Champ Proche pour la détection de Mécanismes et Signes Précurseurs aux Instabilités Gravitaires : Surveillance expérimentale d'une Cavité Saline en exploitation : Cas du site de Cerville-Buissoncourt." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL107N/document.

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L'étude des signes précurseurs d'un effondrement brutal au-dessus de cavités souterraines, dont le recouvrement est caractérisé par la présence d'un banc massif et raide, est un problème majeur pour la sécurité publique. Aussi, pour progresser dans la compréhension et l'évolution des mécanismes mis en jeu, une cavité saline, située dans le NE de la France, a été suivie en temps réel, entre 2004 et 2009, jusqu'à son effondrement. Celle-ci a été exploitée par dissolution, jusqu'à atteindre une dimension critique (de l'ordre de 180 m) sous un recouvrement de 180 m, armé d'un banc raide de Dolomie

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Al-Hinai, Amer. "Voltage collapse prediction for interconnected power systems." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1639.

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Thesis (M.S.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains xii, 94 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 66-67).

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Georgakopoulos, Phillip J. (Phillip John) 1982. "An overview of progressive collapse in structural systems." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/31117.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.<br>Includes bibliographical references (leaves 54-55).<br>It has become evident recently that abnormal loads need to be considered in the design of structures so that progressive collapse can be prevented. Building collapses such as the Ronan Point, Alfred P. Murrah, and World Trade Center have shown the catastrophic nature of progressive collapse and with an increasing trend towards more terrorist action in the future, it is clear structural design must include progressive collapse mit

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Hawkins, Nigel Trevor. "On-line reactive power management in electric power systems." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363434.

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Santos, Carlisson Junior Ramos dos. "Método rápido para avaliação da margem de estabilidade de tensão considerando os limites de potência reativa dos geradores." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-06042009-152456/.

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A análise de estabilidade de tensão em tempo real exige o cálculo periódico da margem de estabilidade para um número grande de contingências. Isto motiva o desenvolvimento de técnicas rápidas para determinação da margem de estabilidade de tensão adequadas aos requisitos da operação em tempo real. Neste trabalho utiliza-se uma técnica rápida, denominada Look-Ahead, para estimar a margem de carregamento do sistema de potência. O método explora a propriedade quadrática da curva (\'lâmbda\'-V) , próximo ao ponto de bifurcação, e utiliza a informação de dois fluxos de potência e do vetor tangente p

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Hemmerlin-Kohler, Sophie. "Estimation et agrégation des puissances actives et réactives absorbées par les charges consommatrices d'un réseau en régime perturbé." Grenoble INPG, 1993. https://hal.archives-ouvertes.fr/tel-02010571.

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Les réseaux électriques sont des systèmes complexes dont l'étude requiert l'utilisation de moyens de simulation numérique importants. Certains régimes perturbés tels que ceux qui précèdent et succèdent à un écoulement de tension, sont fortement conditionnés par le comportement des charges consommatrices. Si la modélisation des composants du réseau, est devenue assez précise, il n'en est pas encore de même pour des charges, vues comme des ensembles agrégés. L'étude a consisté à établir les modèles élémentaires de diverses charges rentrées couramment dans les réseaux, ainsi que les modèles de le

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Lomas, Mark Richard. "An investigation of voltage collapse phenomena in power systems." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266016.

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Lignos, Dimitrios. "Sidesway collapse of deteriorating structural systems under seismic excitations /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Wilson, Jonathan P. "Non-linear dynamics and power systems." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341136.

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Bahadornejad, Momen. "On-line local load measurement based voltage instability prediction." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16187/1/Momen_Bahadornejad_Thesis.pdf.

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Voltage instability is a major concern in operation of power systems and it is well known that voltage instability and collapse have led to blackout or abnormally low voltages in a significant part of the power system. Consequently, tracking the proximity of the power system to an insecure voltage condition has become an important element of any protection and control scheme. The expected time until instability is a critical aspect. There are a few energy management systems including voltage stability analysis function in the real-time environment of control centres, these are based on assu

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Bahadornejad, Momen. "On-line local load measurement based voltage instability prediction." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16187/.

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Voltage instability is a major concern in operation of power systems and it is well known that voltage instability and collapse have led to blackout or abnormally low voltages in a significant part of the power system. Consequently, tracking the proximity of the power system to an insecure voltage condition has become an important element of any protection and control scheme. The expected time until instability is a critical aspect. There are a few energy management systems including voltage stability analysis function in the real-time environment of control centres, these are based on assump

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Xue, Huizhong. "Progressive Collapse Resistance of Reinforced Concrete Flat Plate Structures." Thesis, Griffith University, 2019. http://hdl.handle.net/10072/388147.

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Progressive collapse of structures caused by extreme or accidental loads may lead to significant loss of life and property. Considerable research efforts have been made to date to mitigate the probability of progressive collapse and its consequences. However, a vast amount of the existing knowledge is pertinent to the reinforced concrete (RC) frame structures whilst the understanding of progressive collapse mechanisms of RC flat plate structures is still limited. RC flat plate structures represent one of the most common construction systems used in residential buildings and car parks in Austra

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Bahari, Iskandar. "Collapse, revival and decoherence of entanglement in two qubits systems." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/20491/.

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We extend study of the Jaynes-Cummings model involving a pair of identical two-level atoms (or qubits) interacting with a single mode quantised field. We investigate the effects of replacing the radiation field mode with a ‘big spin’, comprising a collection of N qubits, or spin-1/2 particles. We demonstrate the similarities of this set-up to the qubits-field model in terms of the qubits state probability, occurrence of attractor states, generation of Schr ̈odinger cat state, and in particular the collapse and revival of the entanglement between the two qubits in the qubit subsystem. We extend

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Rodrigues, Roberio Paulino. "O colapso da URSS: um estudo das causas." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/8/8137/tde-11072007-112541/.

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Investiga as causas históricas, políticas, sociais e econômicas que mais contribuíram para o colapso e desaparecimento da União Soviética em 1991. Como um esforço de reinterpretação do fenômeno, desde a gênese até o esgotamento da URSS, apóia-se em análises e dados de alguns dos mais conhecidos especialistas no assunto. Considera que um conjunto de elementos se combinou para tal desfecho. Aponta como causas principais: a) o atraso material e cultural da velha Rússia para iniciar a construção do socialismo; b) o isolamento da Revolução Russa, fruto, entre outros fatores, do reformismo político

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Angeles, Antolin Linan Maria. "Effects of load modelling on Voltage Impasse Regions (VIR)." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254416.

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Voltage Impasse Region (VIR) is a phenomenon in power systemswhose dynamics are describe by a set of Differential AlgebraicEquations (DAE). VIR denotes a state-space area where voltagecausality is lost, i.e. the Jacobian of the algebraic part of DAEis singular. In a Time Domain Simulation (TDS) once system trajectoriesenter VIR, TDS experiences non-convergence of the solution.Then, there is no reason to continue with the simulation. Thisis why it is important to understand the mechanisms that introduceVIR. It is known that VIR appears in relation to static, non-linearload models. However, it r

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Navarro-Perez, Rogelio. "Voltage collapse proximity assessment for the operational planning of power systems." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241887.

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Mukhedkar, Radnya A. "Flexible alternating current transmission systems for the prevention of voltage collapse in electrical power systems." Thesis, University of the West of England, Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252564.

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Hui, Ka Chun. "Voltage collapse indicators for on-line voltage security monitoring in power systems." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313312.

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Mohammed, Mahmoud M. Jr. "Development of intelligent systems for evaluating voltage profile and collapse under contingency operation." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/8408.

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Doctor of Philosophy<br>Department of Electrical and Computer Engineering<br>Shelli K. Starrett<br>Monitoring and control of modern power systems have become very complex tasks due to the interconnection of power grids. These large-scale power grids confront system operators with a huge set of system inputs and control parameters. This work develops and compares intelligent systems-based algorithms which may be considered by power system operators or planners to help manage, process, and evaluate large amounts of data due to varying conditions within the system. The methods can be used to p

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Wang, Zihao. "Conceptualization and design of a future chest drainage canister." Thesis, Umeå universitet, Designhögskolan vid Umeå universitet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-125683.

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Changsha city in Hunan province, China. Place: Changsha Center Hospital, Hunan province. City Area: 11,819 square kilometers City population: 714.66 million I watched the whole process of chest drainage surgery, introduced by Yang Jicheng, who is a thoracic surgeon attending doctor at this capital. During the field research in China, I also had research opportunity of chest drainage management, mostly performed by nurses, where I found out lots of design opportunities about the Chong canister, which was the most popular chest drainage canister used all over the China Then I went back to Ume

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Alrsai, Mahmoud S. "Experimental and Numerical Study on Propagation Buckling in Pipe-in-Pipe Systems." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/395531.

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Subsea pipe-in-pipe (PIP) systems are being used extensively in the design of high-pressure and high-temperature (HP/HT) flowlines because of their outstanding thermal insulation performance. A typical PIP system consists of concentric inner and outer pipes, bulkheads, and centralizers. The inner pipe (flowline) conveys production fluids, and the outer pipe (carrier pipe) protects the system from high external pressure (water depths up to 3000 m) and mechanical damage. These two pipes are isolated by centralizers at joints and connected through bulkheads at both ends of the pipeline. The annul

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Tezcan, Tolga. "State space collapse in many-server diffusion limits of parallel server systems and applications." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07022006-162830/.

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Thesis (Ph. D.)--Industrial and Systems Engineering, Georgia Institute of Technology, 2007.<br>Jiangang Dai, Committee Co-Chair ; Amy Ward, Committee Co-Chair ; Anton Kleywegt, Committee Member ; Ron Billings, Committee Member ; Mor Armony, Committee Member.

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Vignjevic, R. "A simplified simulation of the combined bending/torsion collapse of thin walled beams in the explicit DYNA3D code." Thesis, Cranfield University, 1993. http://dspace.lib.cranfield.ac.uk/handle/1826/11110.

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Chevalier, Samuel. "Using Real Time Statistical Data To Improve Long Term Voltage Stability In Stochastic Power Systems." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/637.

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In order to optimize limited infrastructure, many power systems are frequently operated close to critical, or bifurcation, points. While operating close to such critical points can be economically advantageous, doing so increases the probability of a blackout. With the continued deployment of Phasor Measurement Units (PMUs), high sample rate data are dramatically increasing the real time observability of the power grids. Prior research has shown that the statistics of these data can provide useful information regarding network stability and associated bifurcation proximity. Currently, it is no

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Oyarce, Alejandro. "Electrode degradation in proton exchange membrane fuel cells." Doctoral thesis, KTH, Tillämpad elektrokemi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133437.

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The topic of this thesis is the degradation of fuel cell electrodes in proton exchange membrane fuel cells (PEMFCs). In particular, the degradation associated with localized fuel starvation, which is often encountered during start-ups and shut-downs (SUs/SDs) of PEMFCs. At SU/SD, O2 and H2 usually coexist in the anode compartment. This situation forces the opposite electrode, i.e. the cathode, to very high potentials, resulting in the corrosion of the carbon supporting the catalyst, referred to as carbon corrosion. The aim of this thesis has been to develop methods, materials and strategies to

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Beeravolu, Nagendrakumar. "Pattern Recognition of Power Systems Voltage Stability Using Real Time Simulations." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1279.

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The basic idea deals with detecting the voltage collapse ahead of time to provide the operators a lead time for remedial actions and for possible prevention of blackouts. To detect cases of voltage collapse, we shall create methods using pattern recognition in conjunction with real time simulation of case studies and shall develop heuristic methods for separating voltage stable cases from voltage unstable cases that result in response to system contingencies and faults. Using Real Time Simulator in Entergy-UNO Power & Energy Research Laboratory, we shall simulate several contingencies on IEEE

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Cindi, Brian Msizi. "3-D Seismic structural interpretation : insights to thrust faulting and paleo-stress field distribution in the deep offshore Orange Basin, South Africa." University of the Western Cape, 2016. http://hdl.handle.net/11394/5548.

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>Magister Scientiae - MSc<br>The Orange Basin provides exceptional 3-D structures of folds and faults generated during soft-sediment slumping and deformation which is progressive in nature. 3-D seismic and structural evaluation techniques have been used to understand the geometric architecture of the gravity collapse structures. The location of the seismic surveyed area is approximately 370 km northwest of the Port of Saldanha. The interpretation of gravitational tectonics indicate significant amount of deformation that is not accounted for in the imaged thrust belt structure. The Study area c

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Keskin, Mehmet B. "Continuation Power Flow And Voltage Stability In Power Systems." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608718/index.pdf.

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This thesis investigates an important power system phenomenon, voltage stability, by using continuation power flow method. Voltage collapse scenario is presented which can be a serious result of voltage instability and the parameters that affect voltage collapse are discussed. In analyzing power system voltage stability, continuation power flow method is utilized which consists of successive load flows. This method is applied to a sample test system and Turkish Power System and load-voltage curves for several buses are obtained.

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Caswell, Joseph M. "THE POTENTIAL ROLE OF CONSCIOUSNESS IN THE COLLAPSE OF RANDOM PHYSICAL SYSTEMS: A QUANTITATIVE BIOPHYSICAL INVESTIGATION OF COGNITIVE INTENTION." Thesis, Laurentian University of Sudbury, 2014. https://zone.biblio.laurentian.ca/dspace/handle/10219/2202.

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Decades of research into the anomalous phenomenon of consciousness-correlated collapse of random systems has supported the contention that human intention appears capable of eliciting significant deviations within these external systems. The following series of experiments was conducted in order to identify potential physical factors which might play a role in the consciousness-correlated effects on a random event generator device. Transcerebral application of a specific physiologically-patterned electromagnetic field was found to enhance the occurrence of this consciousness-mediated interacti

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