In the formation of galaxy groups and clusters, the dark matter haloes containing satellite galaxies are expected to be tidally stripped in gravitational interactions with the host. We use galaxy-galaxy weak lensing to measure the average mass of dark matter haloes of satellite galaxies as a function of projected distance to the centre of the host, since stripping is expected to be greater for satellites closer to the centre of the cluster. We further classify the satellites according to their stellar mass: Assuming that the stellar component of the galaxy is less disrupted by tidal stripping, stellar mass can be used as a proxy of the infall mass. We study the stellar-to-halo mass relation of satellites as a function of the cluster-centric distance to measure tidal stripping. We use the shear catalogues of the Dark Energy Survey (DES) science verification archive, the Canada-France-Hawaii Lensing Survey (CFHTLenS) and the CFHT Stripe 82 surveys, and we select satellites from the redMaPPer catalogue of clusters. For galaxies located in the outskirts of clusters, we find a stellar-to-halo mass relation in good agreement with the theoretical expectations from Moster et al. for central galaxies. In the centre of the cluster, we find that this relation is shifted to smaller halo mass for a given stellar mass. We interpret this finding as further evidence for tidal stripping of dark matter haloes in high-density environments.

In quantum mechanics, measurements disturb the state of the system being measured. This disturbance is largest for complementary properties (e.g. position and momentum) and hence limits the precision with which such properties can be determined simultaneously. Often, this fact is conflated with Heisenberg's uncertainty principle, which refers to an uncertainty relation between complementary properties that is intrinsic to quantum states. In this thesis, the distinction between these two fundamental characteristics of quantum mechanics is made clear. At the intersection of the two are "joint measurements", which circumvent measurement disturbance to simultaneously determine complementary properties. They have applications in quantum metrology and enable a direct measurement of quantum states. The focus of this thesis is on the latter. The thesis is structured in the following way. The first chapter serves as an introduction to joint measurements. It surveys the seminal works in the field, doing so in a chronological manner to provide some historical context. The remainder of the thesis discusses two strategies to experimentally achieve joint measurements. The first strategy is to sequentially measure the complementary properties, making these measurements weak so that they do not disrupt each other. The second strategy is to first clone the system being measured, and then measure each complementary property on a separate clone. Both strategies are experimentally demonstrated on polarized photons, but can be readily extended to other systems.

This dissertation presents results about computations of Graev metrics on free groups and characterizes isometry groups of countable noncompact Heine-Borel Polish ultrametric spaces. In Chapter 2, computations of Graev metrics are performed on free groups. One of the related results answers an open question of Van Den Dries and Gao. In Chapter 3, isometry groups of countable noncompact Heine-Borel Polish ultrametric spaces are characterized. The notion of generalized tree is defined and a correspondence between the isomorphism group of a generalized tree and the isometry group of a Heine-Borel Polish ultrametric space is established. The concept of a weak inverse limit is introduced to capture the characterization of isomorphism groups of generalized trees. In Chapter 4, partial results of isometry groups of uncountable compact ultrametric spaces are given. It turns out that every compact ultrametric space has a unique countable orbital decomposition. An orbital space consists of disjoint orbits. An orbit subspace of an orbital space is actually a compact homogeneous ultrametric subspace.

Two thallium scorpionate complexes: dihydrobis (3-phenyl-4-cyanopyrazolyl) boratothallium(I) (TlBp Ph,4CN), C 20H 14BN 6Tl and dihydrobis(3-tert-butyl-4-cyanopyrazolyl) boratothallium(I) (TlBp t-Bu,4CN), C 16H 22BN 6Tl have been prepared and characterized by X-ray diffraction. Both compounds crystallize in monoclinic space groups, TlBp Ph,4CN in P2 1/n with a = 4.2039(3) Å, b = 26.2211(17) Å, c = 16.611(1) Å, β = 90.199(3)°, and TlBp t-Bu,4CN in P2 1/c with a = 13.8578(5) Å, b = 9.6741(4) Å, c = 14.2790(5) Å, β 95.141(2)°. The two complexes show similar structures with elongated metal-ligand bonds and intermolecular interactions between the metal ion and cyano substituents, allowing the potential construction of cyanobridged coordination polymers.

No description available.

No description available.

Let (Ω, Σ, µ) be a finite measure space and X, a Banach space with continuous dual X*. A scalarly measurable function f: Ω→X is Dunford integrable if for each x* X*, x*f L1(µ). Define the operator Tf. X* → L1(µ) by T(x*) = x*f. Then f is Pettis integrable if and only if this operator is weak*-to-weak continuous. This paper begins with an overview of this function. Work by Robert Huff and Gunnar Stefansson on the operator Tf motivates much of this paper. Conditions that make Tf weak*-to-weak continuous are generalized to weak*-to­weak continuous operators on dual spaces. For instance, if Tf is weakly compact and if there exists a separable subspace D X such that for each x* X*, x*f = x*fχDµ-a.e, then f is Pettis integrable. This nation is generalized to bounded operators T: X* → Y. To say that T is determined by D means that if x*| D = 0, then T (x*) = 0. Determining subspaces are used to help prove certain facts about operators on dual spaces. Attention is given to finding determining subspaces far a given T: X* → Y. The kernel of T and the adjoint T* of T are used to construct determining subspaces for T. For example, if T*(Y*) ∩ X is weak* dense in T*(Y*), then T is determined by T*(Y*) ∩ X. Also if ker(T) is weak* closed in X*, then the annihilator of ker(T) (in X) is the unique minimal determining subspace for T.

Croisant la sociologie des relations internationales et la sociologie de l’action publique, et s’appuyant sur un travail d’enquête principalement qualitatif – observation participante, entretiens semi-directifs – mais aussi quantitatif – analyse statistique textuelle -, cette thèse analyse les ressorts de la diplomatie climatique du Bangladesh, ainsi que les acteurs qui participent à son élaboration et à sa mise en œuvre. Alors que la littérature sur la gouvernance mondiale du climat s’est longtemps d’abord intéressée au rôle des acteurs « dominants » du régime climatique, cette recherche enrichit ces travaux en étudiant, à l’aide d’un cas d’étude empirique, les capacités de négociation des États « dominés », mais aussi les obstacles à leur participation effective aux négociations climatiques. Elle met en évidence l’existence d’un weak power, qui correspond à la capacité d’un acteur « faible » de contourner et/ou de transformer en avantage comparatif son déficit de puissance structurelle, grâce notamment à des ressources « empruntées » à d’autres acteurs, en vue d’exercer une influence sur le processus et les résultats des négociations. Elle montre comment le Bangladesh est parvenu à acquérir une identité ambiguë dans le régime climatique, marqué par la reconnaissance à la fois de son statut de pays « le plus vulnérable » aux impacts du changement climatique, et de celui de « champion de l’adaptation », qui lui permet de faire entendre sa voix, de capter des financements internationaux et de légitimer ses revendications. Esquissant les contours d’un modèle d’analyse permettant d’analyser les conditions d’activation, les ressources, les stratégies diplomatiques et les types de leadership propres au weak power, cette thèse participe à une meilleure compréhension du « paradoxe structuraliste » identifié par William Zatman et à la place des États dominés dans les négociations internationales. / Cross-checking the sociology of international relations with public policy analysis and mobilizing qualitative – participant observation, semi-structured interviews – and quantitative – textual analysis – methods, this dissertation analyses the development and implementation of the Bangladesh’s climate diplomacy. For a long time, the literature on global climate governance has focused on the role of dominant players in the climate regime. But this body of work does not provide a comprehensive insight on the negotiation capacities of dominated players and the limits to their effective participation. Based on a detailed empirical study, this research aims to fill this gap. It demonstrates the existence of a weak power that is defined as the ability of a « weak » actor to circumvent and/or transform its lack of structural power into comparative advantage, thanks in particular to borrowing resources to other actors, to influence the process and results of negotiations. This research shows how Bangladesh has acquired an ambiguous identity in climate regime, being both “the most vulnerable” country to climate change impacts and the “adaptation leader”. This dual identity allows Bangladesh to raise its voice in climate negotiations, to attract international funding and attention, and to legitimise its claims. This dissertation sketches out the contours of an analytical model enabling to analyse activation conditions, resources, diplomatic strategies and forms of leadership specific to weak power. In doing so, it contributes to a better understanding of the “structuralist paradox” identified by William Zartman and to the role of dominated states in international negotiations.

The Qweak experiment at Thomas Jefferson National Accelerator Facility (Jefferson Lab) will measure the proton's weak charge by measuring the parity violating asymmetry in elastic electron-proton scattering at very low momentum transfer, with the aim of determining the proton's weak charge with 4% combined statistical and systematic errors. The experimental apparatus includes a longitudinally polarized electron beam, a liquid hydrogen target, a room temperature toroidal magnetic spectrometer, and a set of precision detectors for the scattered electrons. The toroidal magnetic spectrometer, which will deflect away the inelastic scattered electrons and focus the elastic scattered electrons onto the detectors, plays a crucially important role in the experiment. In this thesis, in order to meet the requirements for the installation and calibration of the toroidal magnetic spectrometer, the numerical simulation of the spectrometer's magnetic field based on a realistic magnet model is discussed, a precise 3D field mapping is introduced, and some simulation results are provided. The zero-crossing analysis technique, which can be used to precisely infer the individual coil locations of the toroidal magnet, is presented and explored in detail. / October 2007

The Qweak experiment at Thomas Jefferson National Accelerator Facility (Jefferson Lab) will measure the proton's weak charge by measuring the parity violating asymmetry in elastic electron-proton scattering at very low momentum transfer, with the aim of determining the proton's weak charge with 4% combined statistical and systematic errors. The experimental apparatus includes a longitudinally polarized electron beam, a liquid hydrogen target, a room temperature toroidal magnetic spectrometer, and a set of precision detectors for the scattered electrons. The toroidal magnetic spectrometer, which will deflect away the inelastic scattered electrons and focus the elastic scattered electrons onto the detectors, plays a crucially important role in the experiment. In this thesis, in order to meet the requirements for the installation and calibration of the toroidal magnetic spectrometer, the numerical simulation of the spectrometer's magnetic field based on a realistic magnet model is discussed, a precise 3D field mapping is introduced, and some simulation results are provided. The zero-crossing analysis technique, which can be used to precisely infer the individual coil locations of the toroidal magnet, is presented and explored in detail.