Die maximal supersymmetrische Yang-Mills-Theorie im vierdimensionalen Minkowski-Raum ist ein außergewöhnliches Modell der mathematischen Physik. Dies gilt vor allem im planaren Limes, in dem die Theorie integrabel zu sein scheint. So sind etwa ihre Streuamplituden auf Baumgraphenniveau Invarianten einer Yangschen Algebra, die die superkonforme Algebra psu(2,2|4) beinhaltet. Diese unendlichdimmensionale Symmetrie ist ein Kennzeichen für Integrabilität. In dieser Dissertation untersuchen wir Verbindungen zwischen solchen Amplituden und integrablen Modellen, um Grundlagen für eine effiziente, auf der Integrabilität basierende Berechnung von Amplituden zu legen. Dazu charakterisieren wir Yangsche Invarianten innerhalb der Quanten-Inverse-Streumethode, die Werkzeuge zur Behandlung integrabler Spinketten bereitstellt. In diesem Rahmen entwickeln wir Methoden zur Konstruktion Yangscher Invarianten. Wir zeigen, dass der algebraische Bethe-Ansatz für die Erzeugung von Yangschen Invarianten für u(2) anwendbar ist. Die zugehörigen Bethe-Gleichungen lassen sich leicht lösen. Unser Zugang erlaubt es zudem diese Invarianten als Zustandssummen von Vertexmodellen zu interpretieren. Außerdem führen wir ein unitäres Graßmannsches Matrixmodell zur Berechnung Yangscher Invarianten mit Oszillatordarstellungen von u(p,q|m) ein. In einem Spezialfall reduziert es sich zu dem Brezin-Gross-Witten-Model. Wir wenden eine auf Bargmann zurückgehende Integraltransformation auf unser Matrixmodell an, welche die Oszillatoren in Spinor-Helizitäts-artige Variablen überführt. Dadurch gelangen wir zu einer Weiterentwicklung der Graßmann-Integralformulierung bestimmter Amplituden. Die maßgeblichen Unterschiede sind, dass wir in der Minkowski-Signatur arbeiten und die Integrationskontur auf die unitäre Gruppenmannigfaltigkeit festgelegt ist. Wir vergleichen durch unser Integral gegebene Yangsche Invarianten mit Amplituden und kürzlich eingeführten Deformationen derselben. / The maximally supersymmetric Yang-Mills theory in four-dimensional Minkowski space is an exceptional model of mathematical physics. Even more so in the planar limit, where the theory is believed to be integrable. In particular, the tree-level scattering amplitudes were shown to be invariant under the Yangian of the superconformal algebra psu(2,2|4). This infinite-dimensional symmetry is a hallmark of integrability. In this dissertation we explore connections between these amplitudes and integrable models. Our aim is to lay foundations for an efficient integrability-based computation of amplitudes. To this end, we characterize Yangian invariants within the quantum inverse scattering method, which is an extensive toolbox for integrable spin chains. Making use of this setup, we develop methods for the construction of Yangian invariants. We show that the algebraic Bethe ansatz can be specialized to yield Yangian invariants for u(2). Our approach also allows to interpret these Yangian invariants as partition functions of vertex models. What is more, we establish a unitary Graßmannian matrix model for the construction of u(p,q|m) Yangian invariants with oscillator representations. In a special case our formula reduces to the Brezin-Gross-Witten model. We apply an integral transformation due to Bargmann to our unitary Graßmannian matrix model, which turns the oscillators into spinor helicity-like variables. Thereby we are led to a refined version of the Graßmannian integral formula for certain amplitudes. The most decisive differences are that we work in Minkowski signature and that the integration contour is fixed to be a unitary group manifold. We compare Yangian invariants defined by our integral to amplitudes and recently introduced deformations thereof.

A presente tese de doutorado aborda a formação profissional dos trabalhadores da construção civil com objetivo de contribuir com experiências pedagógicas alternativas à sua atual condição heterônoma e oprimida de trabalho, por meio de ensaios experimentais, no formato de \'canteiro escola autogestionário\'. Essas práticas levantaram questões e revelaram lacunas de conhecimento da história das modalidades alternativas unitárias e integrais de educação. Pesquisamos exemplos de escolas e espaços de ampliação da autonomia dos construtores como contribuição para sua emancipação social e política. Nos perguntamos como chegamos a atual separação das profissões, divididas entre teóricas - arquitetos - e práticas - operários. Em busca de sua genealogia, abordamos as primeiras sociedades de classe, na antiguidade, e os primeiros espaços formativos duais, que separam a formação das elites para direção da sociedade - educação liberal e teórica, das classes subalternas - educação prática para o trabalho. A formação de arquitetos e construtores se deu de modo particular nas sociedades de classe: há momentos de formação dual onde arquitetos apreendem seu ofício distante das práticas construtivas, sem uso de sua força de trabalho, a formar \"arquitetos sem construção\", e os construtores apreendem seu trabalho nas oficinas, sem controlar a produção da arquitetura, numa relação dialética, dominados por arquitetos. Noutras sociedades, a formação de arquitetos se dá pela experiência prática físico-corporal na produção material da arquitetura, quando desenvolvem o ofício do desenho, e da representação. É ali, no canteiro de obras que formam-se \"arquitetos com construção\", de origem popular, compondo coletivos autônomos que idealizam e constroem. Na invasão das Américas os europeus treinaram os povos escravizados a construir com estéticas européias. Ergueram edifícios com trabalho heterônomo, oprimido e explorado - salvo exceções como nas Missões Jesuíticas. Com o avanço das forças produtivas no século XIX, criaram Liceus assistenciais, para \"qualificar\" construtores com apoio de trabalhadores italianos. Nesse período - 1870 a 1914, São Paulo - as elites não perceberam que a qualificação artística ampla e autônoma dos construtores resultaria em mobilizações por direitos trabalhistas. Quando se deram conta, recusaram os italianos anarquistas e os capomastri coletivistas construtores do ecletismo paulistano, e apoiaram tecnologia que exclui o trabalhador da criação: o concreto armado. É período de desqualificação e treinamento do trabalhador. Para formar os nacionais, criam a educação empresarial: \"Sistema S\" e em 1964 dão o golpe civil militar, que perdura até 1988. Com a redemocratização ampliam-se experiências formativas autogestionárias, e políticas publicas socializantes até 2016 - golpe midiático parlamentar. Foram 28 anos que permitiram experiências de \"educação de trabalhadores por trabalhadores\", como ensaiado nos \'canteiro escola\' com movimento popular, o MST, e universidade, a USP. Edificamos a \'casa das artes\', na ENFF - Guararema, com técnicas agroecológicas de construção e uma \'viela publica\' no Parque dos Químicos - São Bernardo do Campo, com técnicas compensatórias de drenagem urbana. Os ensaios praticaram as idiossincrasias da formação libertária dos trabalhadores da construção percebidas no levantamento do processo histórico. Essa vivência nos permitiu identificar que os \'canteiro escola\' contemporâneos se inserem nas tradicionais linhas de ação popular pela emancipação da classe. / The present doctoral thesis deals with the professional education of construction workers with the objective of contributing to pedagogical experiences that are alternative to their current heteronomous and oppressed work conditions, through experimental tests in the form of \'construction site - self - managed school\'. These practices raised questions and revealed gaps in knowledge of the history of alternative and unitary modes of education. We have explored examples of schools and spaces for the expansion of the autonomy of the constructors as a contribution to their social and political emancipation. We wonder how we came to the current separation of professions, divided between theoretical - architects - and practices - workers. In search of their genealogy, we approach the first class based societies in antiquity and the first dual formative spaces, separating education of the elites for the direction of society - liberal and theoretical education, and the subaltern classes - practical education for work. The education of architects and builders takes place particularly in class based societies: there are societies where the formation is dual where architects learn their craft away from constructive practices, without using their work force, to create \"architects without construction\", and The builders apprehend their work in the workshops, without controlling the production of architecture, in a dialectical relationship dominated by architects. In other societies, the formation of architects is due to the physical-corporal practical experience in the material production of architecture, when they develop the office of drawing, and in representation, it is at the construction site that they form \"architects with construction\", of popular origin. They are autonomous professionals who idealize and build. In the invasion of the Americas by Europeans the elites trained enslaved people to build with European aesthetics. They erected buildings with heteronomous work, oppressed and exploited. With the advance of productive forces in the nineteenth century, they created assistencial Liceus, to \"qualify\" builders with the support of Italian workers. In this period - 1870 to 1914, São Paulo - we verified that they did not realize that the broad and autonomous artistic qualification of the builders would result in mobilizations for labor rights. When they realized it, they refused the Italian anarchists and the capomastri collectivists builders of the São Paulo eclecticism, sponsoring technology that excludes the worker from creation: the reinforced concrete. There is a period of disqualification and training of the worker. \"National System\" is created, and in 1964 the civilian military coup has place, and lasts until 1988. With redemocratization, self-managed formative experiences and socializing public policies are extended to 2016 - year of media-partisan coup of the elites. These 28 years have generated experiences of \"education of workers by workers\", as rehearsed in the \"construction site school\" with popular movement, the MST, and university, USP. We built the \'house of arts\' at the ENFF - Guararema, with agro-ecological construction techniques and a \'public gallery\' at the Chemical Park - São Bernardo do Campo, with compensatory urban drainage techniques. The essays practiced the idiosyncrasies of the libertarian education of construction workers perceived in the survey of the historical process. This experience allowed us to identify the contemporaries \'construction site schools\' fall within the traditional lines of people`s action for the emancipation of the class.

La compréhension des effets des interactions dans un ensemble de particules quantiques représente un enjeu majeur de la physique moderne. Les atomes ultra-froids sont rapidement devenus un outil incomparable pour étudier ces systèmes quantiques fortement corrélés. Dans cette thèse, nous présentons plusieurs travaux portant sur les propriétés d’un mélange de superfluides de Bose et de Fermi créé à l’aide de vapeurs ultra-froides de ⁷Li et de ⁶Li. Nous étudions tout d'abord les propriétés hydrodynamiques du mélange en créant un contre-courant entre les superfluides. L'écoulement est dissipatif uniquement au dessus d'une vitesse critique que nous mesurons dans le crossover BEC-BCS. Une simulation numérique d’un contre-courant de deux condensats permet de mieux comprendre les mécanismes sous-jacents mis en jeu dans la dynamique. En particulier, l'étude numérique fournit des preuves supplémentaires que l'origine de la dissipation dans nos expériences est liée à l'émission d'excitation élémentaires dans chaque superfluide. Finalement, nous nous intéressons aux pertes inélastiques par recombinaison à trois corps qui peuvent limiter la stabilité de nos nuages. Ces pertes sont intimement liées aux corrélations à courte distance présentes dans le système et sont ainsi connectées aux propriétés universelles du gaz quantique. Cela se manifeste notamment par l’apparition de dépendances en densité ou en température inusuelles du taux de perte lorsque le système devient fortement corrélé. Nous démontrons cet effet dans deux exemples où les interactions sont résonantes, le cas du gaz de Bose unitaire et celui de notre mélange de superfluides Bose-Fermi. Plus généralement, nos travaux montrent que ces pertes inélastiques peuvent être utilisées pour sonder les corrélations quantiques dans un système en fortes interactions. / Understanding the effect of interactions in quantum many-body systems presents some of the most compelling challenges in modern physics. Ultracold atoms have emerged as a versatile platform to engineer and investigate these strongly correlated systems. In this thesis, we study the properties of a mixture of Bose and Fermi superfluids with tunable interactions produced using ultracold vapors of ⁷Li and ⁶Li. We first study the hydrodynamic properties of the mixture by creating a counterflow between the superfluids. The relative motion only exhibit dissipation above a critical velocity that we measure in the BEC-BCS crossover. A numerical simulation of counterflowing condensates allows for a better understanding of the underlying mechanisms at play in the dynamics. In particular, this numerical study provides additional evidence that the onset of friction in our experiment is due to the simultaneous generation of elementary excitations in both superfluids. Finally, we consider the inelastic losses that occur via three-body recombination in our cold gases. This few-body process is intimately related to short-distance correlations and is thereby connected to the universal properties of the many-body system. This manifests as the apparition of an unusual dependence on density or temperature in the loss rate when increasing the interactions. We demonstrate this effect in two examples where interactions are resonant: the case of a dilute unitary Bose gas and the one of impurities weakly coupled to a unitary Fermi gas. More generally, our work shows that inelastic losses can be used to probe quantum correlations in a many-body system.

Après une intrusion chaotique dans la théorie de la responsabilité pénale, l’imputabilité peut aujourd’hui apparaître comme une donnée d’essence classique. Elle répond à une définition subjective faisant consensus en doctrine et supposant l’addition du discernement et d’une volonté libre de l’agent. Dans le prolongement, elle est unanimement entendue comme constituant le fondement de la responsabilité pénale. Cependant, la cohabitation entre les différentes conditions de la responsabilité pénale, en particulier entre les concepts de culpabilité et d’imputabilité, n’est peut-être pas aussi pacifiée qu’il n’y paraît. En réalité, la question de l’indépendance des notions n’a jamais été clairement résolue, car leurs composantes respectives participent des conditions subjectives à l’engagement de la responsabilité pénale. Pourtant, la question est loin d’être anecdotique, en particulier si l’on considère certaines institutions fondamentales du droit pénal, au rang desquelles figurent les notions d’infraction et de complicité. Il apparaît ainsi, à l’analyse, que la définition traditionnelle de l’imputabilité mérite quelques ajustements, conduisant à une reconfiguration du champ de la condition de liberté relevant de l’imputabilité. Cette recherche vise aussi à établir que l’imputabilité est une donnée étrangère à l’infraction concrètement commise. Cette place spécifique au sein de la responsabilité pénale, mettant en évidence le lien entre l’imputabilité et la sanction infligée en rétribution de l’infraction commise, permet d’adopter une vision plus large du concept, susceptible d’affronter le bouleversement consécutif à l’entrée du droit pénal dans l’ère de la post-modernité. Cette dernière, que l’on pourrait associer au néopositivisme pénal du début du siècle, s’est accompagnée d’une résurgence des concepts de risque et de dangerosité. L’impact de cette évolution sur l’imputabilité peut apparaître radical : rupture du caractère unitaire de la notion, émergence du concept d’imputation à l’égard des personnes morales, voire même effacement pur et simple de l’imputabilité à l’égard des personnes physiques. Pourtant, des modalités de restauration de l’exigence d’imputabilité seront envisagées sur les terrains substantiel, par le truchement de l’imputabilité comprise comme capacité pénale, et processuel – par des propositions concernant les procédures pensées en considération de la psychologie de l’agent. Au bout du compte, il apparaît que l’imputabilité est de nature à jouer un rôle décisif dans l’organisation d’une cohabitation raisonnée avec le concept de dangerosité, en condamnant la prise en compte de la dangerosité seulement hypothétique sans exclure la possibilité d’une rétention après la peine. / After a chaotic intrusion in the theory of penal liability, imputability can today appear as a classical notion. The general doctrinal consensus is that it depends on a subjective definition, implying the offender’s discernment and free will. Moreover, the notion of imputability is unanimously considered as the basis of penal liability. However, cohabitation between the various conditions of penal liability, particularly between the concepts of guilt and imputability, may not be as steady as it seems. Indeed, the independence of these notions has actually never been clearly demonstrated, for their respective components represent the subjective conditions creating penal liability. Nevertheless, this topic is far from being anecdotal, specifically among several fundamental institutions of criminal Law, in which the notions of infraction and complicity are involved. Thus, the definition of imputability may deserve some adjustments, and imply, consequently, a reworking of the release condition coming under imputability. This study also aims at proving that imputability is an irrelevant element to the concretely committed offence. This specific part in penal liability, highlighting the link between imputability and the penalty imposed in response to the committed offence, enables a wider vision of the concept that could help facing the upheaval resulting from the entry of criminal Law in the post-modernity era. The latter, that one could associate with the beginning of the century’s penal neopositivism, also implied the resurgence of the concepts of risk and dangerousness. The impact of this evolution about imputability may seem radical : end of the unitary aspect of the notion, emergence of the concept of imputation towards legal entities, and even total erasure of imputability towards natural persons. And yet, some solutions to the reconstitution of the exigence of imputability will be developed, not only in a substantial approach, where imputability will be understood as penal capacity, but also in a procedural approach – thanks to suggestions of procedures taking the offender’s psyche into account. In the end, imputability seems to play a major part in the organization of a balanced cohabitation with the concept of dangerousness, by condemning a strictly hypothetical consideration of dangerousness, without excluding a potential reservation after the penalty.

It is well known that communication using multiple antennas provides high data rate and reliability. Coding across space and time is necessary to fully exploit the gains offered by multiple input multiple output (MIMO) systems. One such popular method of coding for MIMO systems is space-time block coding. In applications where the terminals do not have enough physical space to mount multiple antennas, relaying or cooperation between multiple single antenna terminals can help achieve spatial diversity in such scenarios as well. Relaying techniques can also help improve the range and reliability of communication. Recently it has been shown that certain space-time block codes (STBCs) can be employed in a distributed fashion in single antenna relay networks to extract the same benefits as in point to point MIMO systems. Such STBCs are called distributed STBCs. However an important practical issue with STBCs and DSTBCs is its associated high maximum likelihood (ML) decoding complexity. The central theme of this thesis is to systematically construct STBCs and DSTBCs applicable for various scenarios such that are amenable for low decoding complexity. The first part of this thesis provides constructions of high rate STBCs from crossed product algebras that are minimum mean squared error (MMSE) optimal, i.e., achieves the least symbol error rate under MMSE reception. Moreover several previous constructions of MMSE optimal STBCs are found to be special cases of the constructions in this thesis. It is well known that STBCs from orthogonal designs offer single symbol ML decoding along with full diversity but the rate of orthogonal designs fall exponentially with the number of transmit antennas. Thus it is evident that there exists a tradeoff between rate and ML decoding complexity of full diversity STBCs. In the second part of the thesis, a definition of rate of a STBC is proposed and the problem of optimal tradeoff between rate and ML decoding complexity is posed. An algebraic framework based on extended Clifford algebras is introduced to study the optimal tradeoff for a class of multi-symbol ML decodable STBCs called ‘Clifford unitary weight (CUW) STBCs’ which include orthogonal designs as a special case. Code constructions optimally meeting this tradeoff are also obtained using extended Clifford algebras. All CUW-STBCs achieve full diversity as well. The third part of this thesis focusses on constructing DSTBCs with low ML decoding complexity for two hop, amplify and forward based relay networks under various scenarios. The symbol synchronous, coherent case is first considered and conditions for a DSTBC to be multi-group ML decodable are first obtained. Then three new classes of four-group ML decodable full diversity DSTBCs are systematically constructed for arbitrary number of relays. Next the symbol synchronous non-coherent case is considered and full diversity, four group decodable distributed differential STBCs (DDSTBCs) are constructed for power of two number of relays. These DDSTBCs have the best error performance compared to all previous works along with low ML decoding complexity. For the symbol asynchronous, coherent case, a transmission scheme based on orthogonal frequency division multiplexing (OFDM) is proposed to mitigate the effects of timing errors at the relay nodes and sufficient conditions for a DSTBC to be applicable in this new transmission scheme are given. Many of the existing DSTBCs including the ones in this thesis are found to satisfy these sufficient conditions. As a further extension, differential encoding is combined with the proposed transmission scheme to arrive at a new transmission scheme that can achieve full diversity in symbol asynchronous, non-coherent relay networks with no knowledge of the timing errors at the relay nodes. The DDSTBCs in this thesis are proposed for application in the proposed transmission scheme for symbol asynchronous, non-coherent relay networks. As a parallel to the non-coherent schemes based on differential encoding, we also propose non-coherent schemes for symbol synchronous and symbol asynchronous relay networks that are based on training. This training based transmission scheme leverages existing coherent DSTBCs for non-coherent communication in relay networks. Simulations show that this training scheme when used along with the coherent DSTBCs in this thesis outperform the best known DDSTBCs in the literature. Finally, in the last part of the thesis, connections between multi-group ML decodable unitary weight (UW) STBCs and groups with real elements are established for the first time. Using this connection, we translate the necessary and sufficient conditions for multi-group ML decoding of UW-STBCs entirely in group theoretic terms. We discuss various examples of multi-group decodable UW-STBCs together with their associated groups and list the real elements involved. These examples include orthogonal designs, quasi-orthogonal designs among many others.

本論文採取歷史文獻分析與理解社會學(verstehende Soziologie)的研究途徑，從「以中國說中國」的方法入手，重視歷史事實作為論證基礎的功能與意義。 對中共「民主集中制」的研究在廣度與深度上都超乎中國大陸內部與外部學者在這方面的論述，系統化地借助中共黨史反映了民主集中制一般不為人所注意的關鍵面向。對民主集中制之作用的分析引導筆者發現，中國大陸總體面出現一個「黨、國家、社會」的三角形，這是在現階段與可預見之未來的人類文明中一個非常態的國家總體結構。筆者進而對照西方權力制衡的理論，反映出在民主集中制下是不可能發展出真正的權力制約與監督的機制的，民主集中制的內涵處處體現「一元化整體性控制意識」，民主與民主集中制之間無論就理論或現實運作都存在不可調和的矛盾。 改革開放以來的中共文化戰略奠基者為鄧小平，他的基本方法是將重心放在寄望以經濟建設的成果支持行為層面的紀律，進而鞏固精神思想層面的意識形態。順此，他主張「不搞爭論」與「堅持四項基本原則」，希望大力發展生產力，強調的是「工具理性」。這些其實都是受民主集中制之「一元化整體性控制意識」的影響。 筆者採用各種型態的資料與具體數據說明「『民主集中制』對文化戰略的影響」與「『民主集中制』對改革開放以來文化戰略與戰略造成的困難與挑戰」，呈現出中共文化戰略的不合理與不合時的性質。從文化戰略的視角可以看到許多中國大陸現今不易從單純的政治、經濟、社會的角度所能觀察到的問題。本論文針對此方面的解決方案與方向提出了一些線索與頭緒。 最後，解釋在第一章提出之胡錦濤表現的反差現象。其次，論證中國大陸的政治體制改革應為不可迴避的必要之務，民主改革未必對中共不利，可能更有利。同時回答第一章中共如何統治的問題。 / Adopting the approaches of historical document analyses and understanding sociology, this dissertation brings the method of explaining China in terms of China into bear and places importance on the function and meaning of historical facts as the departing basis of its discussions. Based on the Chinese Communist Party’s (the CCP hereafter) history, the dissertation systematically presents some key points of the CCP’s democratic centralism, to which attention was not paid. It shows wider and deeper understanding of the CCP’s democratic centralism. The understanding leads the author to notice the “party, state and society” triangle, which reflects the uniqueness of the structure of China as a country in the contemporary world. The CCP’s democratic centralism reflects “consciousness of unitary holistic control” and is in fact incompatible with democracy by its normal definition in respect of theory and practice. The foundation of the CCP’s cultural development since the reform and opening was laid by Deng Xiaoping, whose methodology laid stress on economic development. Deng hoped to accomplish some economic achievements to secure behavioral discipline among people and finally consolidate the party’s ideologies and theories. He therefore advocated “no disputes” and “insistence on four fundamental principles” and did his best to promote development of productivity, namely instrumental rationality. All he did embodied “consciousness of unitary holistic control,” so has the CCP’s cultural strategies done the same. Basing on different types of materials and data, the author analyzed the influences of the CCP’s democratic centralism on its cultural strategies and presented the difficulties and challenges to the strategies caused by the democratic centralism since the reform and opening. In the final chapter, the author explained Hu Jintao’s surprising reaction and answered the question how the CCP has been ruling the country. Both were mentioned in Chapter one.

With the establishment of the Directorate of Special Operations (Scorpions), the Asset Forfeiture Unit (AFU), the Special Investigating Unit (SIU) and the Departmental Investigating Unit (DIU), questions were asked as to whether this is a creation of new units of the Police Service. These questions were exaggerated by the fact that the media uses the term "Scorpions" whenever the Scorpions, the AFU, SIU and the DIU perform their functions. South African legislation that governs organised crime does not demarcate activities to be dealt with by the SAPS, AFU, DIU, Scorpions and the SIU. The Constitution of South Africa lays down the objects of the police, but it is silent about the objectives of the Scorpions, AFU, SIU, DIU and other investigative institutions except that it only mentions the creation of a single National Prosecuting Authority (NPA). A literature study was used as the basis for this study. In addition, unstructured interviews and observation were used to gather evidence from the relevant stakeholders. An analysis of the SAPS Detective Service, the Special Investigating Unit (SIU), the Scorpions, the Departmental Investigating Unit (DIU) of the Department of Correctional Services and the Asset Forfeiture Unit (AFU), was done in order to establish the overlapping of functions. Indeed, overlapping was discovered between the Scorpions and the SAPS Detective Service, the AFU and the SIU, as well as between the SAPS and the DIU. In order to make a proper finding, an analysis was done of anti-corruption agencies in Botswana, Nigeria, Malawi and Hong Kong. The findings indicate that the better way of fighting corruption, fraud, economic and financial crimes, is through the establishment of a single agency that will work independently from the police, with a proper jurisdiction. / Criminology and Security Science / D.Litt. et Phil.(Police Science)

A presente tese aborda dois problemas distintos e independentes: triangularização de sistemas não-lineares com duas entradas e controle de sistemas sem arrasto que evoluem no grupo especial unitário SU(n). Em relação ao primeiro, estabeleceu-se, através da generalização de resultados bem conhecidos, condições geométricas para que um sistema com duas entradas seja descrito por uma forma triangular específica após uma mudança de coordenadas e uma realimentação de estado estática regular. Para o segundo problema, desenvolveu-se uma estratégia de controle que força o estado do sistema a rastrear assintoticamente uma trajetória de referência periódica que passa por um estado objetivo arbitrário. O método de controle proposto utiliza os resultados de convergência de tipo- Lyapunov que foram estabelecidos pela presente pesquisa e que tiveram como inspiração uma versão periódica do princípio da invariância de LaSalle. Apresentou-se, ainda, os resultados de simulação obtidos com a aplicação da técnica de controle desenvolvida a um sistema quântico consistindo de duas partículas de spin-1/2, com o objetivo de gerar a porta lógica quântica C-NOT. / This thesis treats two distinct and independent problems: triangularization of nonlinear systems with two inputs and control of driftless systems which evolve on the special unitary group SU(n). Concerning the first, one has established, by means of the generalization of well-known results, geometric conditions for a system with two inputs to be described by a specific triangular form after a change of coordinates and a regular static state feedback. For the second problem, one has developed a control strategy that forces the state of the system to track in an asymptotic manner a periodic reference trajectory which passes by an arbitrary goal state. The proposed control method uses Lyapunovlike convergence results that were established in this research and which were inspired in a periodic version of LaSalles invariance principle. Furthermore, one has shown the simulation results obtained from the application of the developed control technique to a quantum system consisting of two spin-1/2 particles, with the aim of generating the C-NOT quantum logic gate.

A presente tese de doutorado aborda a formação profissional dos trabalhadores da construção civil com objetivo de contribuir com experiências pedagógicas alternativas à sua atual condição heterônoma e oprimida de trabalho, por meio de ensaios experimentais, no formato de \'canteiro escola autogestionário\'. Essas práticas levantaram questões e revelaram lacunas de conhecimento da história das modalidades alternativas unitárias e integrais de educação. Pesquisamos exemplos de escolas e espaços de ampliação da autonomia dos construtores como contribuição para sua emancipação social e política. Nos perguntamos como chegamos a atual separação das profissões, divididas entre teóricas - arquitetos - e práticas - operários. Em busca de sua genealogia, abordamos as primeiras sociedades de classe, na antiguidade, e os primeiros espaços formativos duais, que separam a formação das elites para direção da sociedade - educação liberal e teórica, das classes subalternas - educação prática para o trabalho. A formação de arquitetos e construtores se deu de modo particular nas sociedades de classe: há momentos de formação dual onde arquitetos apreendem seu ofício distante das práticas construtivas, sem uso de sua força de trabalho, a formar \"arquitetos sem construção\", e os construtores apreendem seu trabalho nas oficinas, sem controlar a produção da arquitetura, numa relação dialética, dominados por arquitetos. Noutras sociedades, a formação de arquitetos se dá pela experiência prática físico-corporal na produção material da arquitetura, quando desenvolvem o ofício do desenho, e da representação. É ali, no canteiro de obras que formam-se \"arquitetos com construção\", de origem popular, compondo coletivos autônomos que idealizam e constroem. Na invasão das Américas os europeus treinaram os povos escravizados a construir com estéticas européias. Ergueram edifícios com trabalho heterônomo, oprimido e explorado - salvo exceções como nas Missões Jesuíticas. Com o avanço das forças produtivas no século XIX, criaram Liceus assistenciais, para \"qualificar\" construtores com apoio de trabalhadores italianos. Nesse período - 1870 a 1914, São Paulo - as elites não perceberam que a qualificação artística ampla e autônoma dos construtores resultaria em mobilizações por direitos trabalhistas. Quando se deram conta, recusaram os italianos anarquistas e os capomastri coletivistas construtores do ecletismo paulistano, e apoiaram tecnologia que exclui o trabalhador da criação: o concreto armado. É período de desqualificação e treinamento do trabalhador. Para formar os nacionais, criam a educação empresarial: \"Sistema S\" e em 1964 dão o golpe civil militar, que perdura até 1988. Com a redemocratização ampliam-se experiências formativas autogestionárias, e políticas publicas socializantes até 2016 - golpe midiático parlamentar. Foram 28 anos que permitiram experiências de \"educação de trabalhadores por trabalhadores\", como ensaiado nos \'canteiro escola\' com movimento popular, o MST, e universidade, a USP. Edificamos a \'casa das artes\', na ENFF - Guararema, com técnicas agroecológicas de construção e uma \'viela publica\' no Parque dos Químicos - São Bernardo do Campo, com técnicas compensatórias de drenagem urbana. Os ensaios praticaram as idiossincrasias da formação libertária dos trabalhadores da construção percebidas no levantamento do processo histórico. Essa vivência nos permitiu identificar que os \'canteiro escola\' contemporâneos se inserem nas tradicionais linhas de ação popular pela emancipação da classe. / The present doctoral thesis deals with the professional education of construction workers with the objective of contributing to pedagogical experiences that are alternative to their current heteronomous and oppressed work conditions, through experimental tests in the form of \'construction site - self - managed school\'. These practices raised questions and revealed gaps in knowledge of the history of alternative and unitary modes of education. We have explored examples of schools and spaces for the expansion of the autonomy of the constructors as a contribution to their social and political emancipation. We wonder how we came to the current separation of professions, divided between theoretical - architects - and practices - workers. In search of their genealogy, we approach the first class based societies in antiquity and the first dual formative spaces, separating education of the elites for the direction of society - liberal and theoretical education, and the subaltern classes - practical education for work. The education of architects and builders takes place particularly in class based societies: there are societies where the formation is dual where architects learn their craft away from constructive practices, without using their work force, to create \"architects without construction\", and The builders apprehend their work in the workshops, without controlling the production of architecture, in a dialectical relationship dominated by architects. In other societies, the formation of architects is due to the physical-corporal practical experience in the material production of architecture, when they develop the office of drawing, and in representation, it is at the construction site that they form \"architects with construction\", of popular origin. They are autonomous professionals who idealize and build. In the invasion of the Americas by Europeans the elites trained enslaved people to build with European aesthetics. They erected buildings with heteronomous work, oppressed and exploited. With the advance of productive forces in the nineteenth century, they created assistencial Liceus, to \"qualify\" builders with the support of Italian workers. In this period - 1870 to 1914, São Paulo - we verified that they did not realize that the broad and autonomous artistic qualification of the builders would result in mobilizations for labor rights. When they realized it, they refused the Italian anarchists and the capomastri collectivists builders of the São Paulo eclecticism, sponsoring technology that excludes the worker from creation: the reinforced concrete. There is a period of disqualification and training of the worker. \"National System\" is created, and in 1964 the civilian military coup has place, and lasts until 1988. With redemocratization, self-managed formative experiences and socializing public policies are extended to 2016 - year of media-partisan coup of the elites. These 28 years have generated experiences of \"education of workers by workers\", as rehearsed in the \"construction site school\" with popular movement, the MST, and university, USP. We built the \'house of arts\' at the ENFF - Guararema, with agro-ecological construction techniques and a \'public gallery\' at the Chemical Park - São Bernardo do Campo, with compensatory urban drainage techniques. The essays practiced the idiosyncrasies of the libertarian education of construction workers perceived in the survey of the historical process. This experience allowed us to identify the contemporaries \'construction site schools\' fall within the traditional lines of people`s action for the emancipation of the class.

Mon travail de thèse est composé de deux parties bien distinctes, la première partie est consacrée à l’analysestochastique en temps discret des marches aléatoires obtuses quant à la deuxième partie, elle est liée aux probabili-tés libres. Dans la première partie, on donne une construction des intégrales stochastiques itérées par rapport à unefamille de martingales normales d-dimentionelles. Celle-ci permet d’étudier la propriété de représentation chaotiqueen temps discret et mène à une construction des opérateurs gradient et divergence sur les chaos de Wiener correspon-dant. [...] d’une EDP non linéaire alors que la deuxième est de nature combinatoire.Dans un second temps, on a revisité la description de la mesure spectrale de la partie radiale du mouvement Browniensur Gl(d,C) quand d ! +¥. Biane a démontré que cette mesure est absolument continue par rapport à la mesurede Lebesgue et que son support est compact dans R+. Notre contribution consiste à redémontrer le résultat de Bianeen partant d’une représentation intégrale de la suite des moments sur une courbe de Jordon autour de l’origine etmoyennant des outils simples de l’analyse réelle et complexe. / My PhD work is composed of two parts, the first part is dedicated to the discrete-time stochastic analysis for obtuse random walks as to the second part, it is linked to free probability. In the first part, we present a construction of the stochastic integral of predictable square-integrable processes and the associated multiple stochastic integrals ofsymmetric functions on Nn (n_1), with respect to a normal martingale.[...] In a second step, we revisited thedescription of the marginal distribution of the Brownian motion on the large-size complex linear group. Precisely, let (Z(d)t )t_0 be a Brownian motion on GL(d,C) and consider nt the limit as d !¥ of the distribution of (Z(d)t/d)⋆Z(d)t/d with respect to E×tr.