«A-t-on le droit de cédéromiser René Magritte? »

in L'imaginaire de l'écran/Screen Imaginary (2004)

A. S. Byatt, Possession (1990)

in Reinfandt, Christoph (Ed.) Handbook of the English Novel of the Twentieth and Twenty-First Centuries (2017)

A. S. Byatt’s novel Possession (1990) revolves around questions of writing the past, more particularly the Victorian past, from the perspective of the late twentieth century. As outlined in the essay ... [more ▼]

A. S. Byatt’s novel Possession (1990) revolves around questions of writing the past, more particularly the Victorian past, from the perspective of the late twentieth century. As outlined in the essay, Byatt’s novel stages various forms of possession, both material and immaterial, linking them to issues of identity and female autonomy as well as to epistemological and ethical notions of poetry and imagination. Possession is an ambivalent text in that it problematizes the ontological, epistemological and methodological problems of writing the past; at the same time, the novel asserts the desire to acquire knowledge of the past, exploring literary genres, poetry and imagination as various means of opening the past to the present. As a Neo-Victorian text, Possession re-evaluates perceived cliches about the Victorian age, rewriting it as an era of a benign humanism that counteracts late-twentieth-century doubts and insecurities. [less ▲]

The A_infty de Rham theorem and integration of representations up to homotopy

in International Mathematics Research Notices (2013), 2013(16), 3790-3855

We use Chen's iterated integrals to integrate representations up to homotopy. That is, we construct an A-infinity functor from the representations up to homotopy of a Lie algebroid A to those of its ... [more ▼]

We use Chen's iterated integrals to integrate representations up to homotopy. That is, we construct an A-infinity functor from the representations up to homotopy of a Lie algebroid A to those of its infinity groupoid. This construction extends the usual integration of representations in Lie theory. We discuss several examples including Lie algebras and Poisson manifolds. The construction is based on an A-infinity version of de Rham's theorem due to Gugenheim. The integration procedure we explain here amounts to extending the construction of parallel transport for superconnections, introduced by Igusa and Block-Smith, to the case of certain differential graded manifolds. [less ▲]

Aachen - Mailand - Rom - Jerusalem: die Luxemburger als Kaiserdynastie. Die Kaiserkrönung Heinrichs VII. in den maas-moselländischen Quellen

in Penth, Sabine; Thorau, Peter (Eds.) Rom 1312. Die Kaiserkrönung Heinrichs VII. und die Folgen. Die Luxemburger als Herrscherdynastie von gesamteuropäischer Bedeutung (2016)

Aacht Filmer vum Projet COMPARE: 1. Aféierung; 2. Literacy – Wat ass dat?: 3. Literacy entwéckelen – Wéi a mat weem?; 4. Elterebesuch – Eng Beräicherung; 5. Um Wee zum Partenariat mat den Elteren

Learning material (2022)

Aféierung Aféierung an d’Filmer vum Projet COMPARE An dëser Serie vu Videoe weise mir iech wéi dir Literacy mat klenge Kanner entwéckelen kennt a wéi Zesummenaarbescht mat Elteren a Bibliothéiken iech ... [more ▼]

Aféierung Aféierung an d’Filmer vum Projet COMPARE An dëser Serie vu Videoe weise mir iech wéi dir Literacy mat klenge Kanner entwéckelen kennt a wéi Zesummenaarbescht mat Elteren a Bibliothéiken iech heibäi hëllefen. Film 1 Literacy – Wat ass dat? Fréi Erfarunge mat Literacy beaflossen de Kanner hir sproochlech Fähegkeeten, hir Erzielfähegkeet, de Prozess vum Liesen- a Schreiweléieren an hir spéider Leeschtunge an der Schoul. Den éischte Video stellt d'Konzept vu Literacy vir a presentéiert produktiv Situatiounen. Film 2 Literacy entwéckelen – Wéi a mat weem? An dësem Film weise mir iech wéi Dir Literacy zesumme mat Elteren a Bibliothéike kennt entweckelen. Film 3 Elterebesuch – Eng Beräicherung Dëse Video weist iech zwee Beispiller vun Zesummenaarbecht. Eng Educatrice an Elteren erklären de Benefice vun der Zesummenaarbecht fir d’Kanner, d’Elteren an d’Educatricen. Film 4 Um Wee zum Partenariat mat den Elteren An dëser Crèche kachen d’Educatrice reegelméisseg mat de Kanner an heiansdo mat den Elteren. Situatiounen vu Literacy a verschiddene Sprooche komme spontan op. Elteren an d’Chargée vun der Crèche presentéieren d'Auswierkunge vun der Zesummenaarbecht. [less ▲]

AASA: locating the central administration of a subsidiary company which is part of a group of companies under Article 60 of Brussels I Regulation

in European Company Law (2015), 1

There is no definition of the term “central administration” under Article 60(1)(b) of Brussels I; and Article 60 of Brussels I does not make specific provisions for locating the central administration of ... [more ▼]

There is no definition of the term “central administration” under Article 60(1)(b) of Brussels I; and Article 60 of Brussels I does not make specific provisions for locating the central administration of a subsidiary company within a corporate group. English Courts in Anglo American South Africa Limited after a re-evaluation of the correctness of previous decisions by English judges on the subject of Article 60(1)(b), provided an autonomous interpretation of central administration, and sought to apply the concept of central administration in a “European way” to a subsidiary company within a corporate group. The author challenges the approach of English judges for not referring the question of how Article 60(1)(b) applies to corporate groups to the CJEU. [less ▲]

Ab initio approaches to Resonant Raman Spectroscopy of Transition Metal Dichalcogenides

Doctoral thesis (2017)

This thesis deals with the theory and simulation of resonant Raman spectroscopy in two-dimensional transition metal dichalcogenides. We present two different ab initio approaches. In the first, we ... [more ▼]

This thesis deals with the theory and simulation of resonant Raman spectroscopy in two-dimensional transition metal dichalcogenides. We present two different ab initio approaches. In the first, we calculate the Raman susceptibility tensor as a function of laser energy from the change of the dielectric susceptibility with atomic displacements. In the second, we formulate the Raman tensor in terms of time-dependent perturbation theory and calculate it using electron-light and electron-phonon coupling matrix elements obtained from density functional theory. We investigate the role of resonance, quantum interference and excitonic effects in the Raman spectra of single and triple-layer MoTe2. We compare our simulations with experimental results, explaining the dependence of the Raman intensities on the excitation energy. We demonstrate that the two approaches are formally and numerically equivalent in the adiabatic limit. In addition, the second approach allows to include the dynamical effects and captures a shift of the intensities with respect to the adiabatic case. This method is also more computationally efficient and is extended to include temperature effects using many-body perturbation theory. We have implemented both of these methods in a software package with interfaces to open source ab initio codes. Furthermore, we have developed web based tools to visualize excitonic states and phonon modes. [less ▲]

Ab initio calculations of the lattice dynamics of boron nitride nanotubes

in Physical Review. B (2003), 68(4),

We present an extensive first-principles study of the phonons in boron nitride nanotubes using density functional perturbation theory in the local density approximation. Based on the nonsymmorphic rod ... [more ▼]

We present an extensive first-principles study of the phonons in boron nitride nanotubes using density functional perturbation theory in the local density approximation. Based on the nonsymmorphic rod-group symmetry of the tubes, the Raman- and infrared-active modes at the Gamma point of the one-dimensional Brillouin zone are evaluated. For zigzag and chiral nanotubes, the set of infrared-active modes is a subset of the Raman- active modes. In particular, the radial breathing mode is not only Raman but also infrared active. However, for armchair tubes, the sets of infrared-and Raman- active modes are disjoint. This may serve to spectroscopically distinguish between macroscopic samples of zigzag-chiral and armchair nanotubes. We present the frequencies of the active modes of zigzag, chiral, and armchair tubes as a function of the tube diameter and compare the results with the frequencies obtained by the zone-folding method, i.e., the rolling of a single hexagonal BN sheet into a tube. Except for the high-frequency tangential modes, the zone-folding results are in very good agreement with the ab initio calculations. The radial breathing mode frequency can be derived by folding a sheet of finite width. Finally, we show that the effects of bundling on the phonon frequencies are small. This demonstrates that the obtained results for isolated BN tubes may serve as a basis for an accurate assignment of phonon modes in spectroscopic measurements. [less ▲]

Ab initio perspective on the Mollwo-Ivey relation for F centers in alkali halides

in Physical Review. B, Condensed Matter and Materials Physics (2015), 92

We revisit the well-known Mollwo-Ivey relation that describes the ``universal'' dependence of the absorption energies of F-type color centers on the lattice constant a of alkali-halide crystals, E-abs ... [more ▼]

We revisit the well-known Mollwo-Ivey relation that describes the ``universal'' dependence of the absorption energies of F-type color centers on the lattice constant a of alkali-halide crystals, E-abs proportional to a(-n). We perform both state-of-the-art ab initio quantum chemistry and post-DFT calculations of F-center absorption spectra. By ``tuning'' independently the lattice constant and the atomic species we show that the scaling with the lattice constant alone 2 in agreement with the ``particle-in-the-box'' model. Keeping the lattice constant fixed and changing the atomic species enables us to quantify the ion-size effects which are shown to be responsible for the exponent n approximate to 1.8. [less ▲]

Ab-initio calculation of muon spin polarization function to study lithium-ion diffusion in LiTi2O4 battery material

in AIP Conference Proceedings (2020), 2256(1), 030015

We report the study of lithium-ion diffusion in LiTi2O4 battery material by the analysis of muon spin polarization function at the muon site by DFT calculation. The important parameters which explain the ... [more ▼]

We report the study of lithium-ion diffusion in LiTi2O4 battery material by the analysis of muon spin polarization function at the muon site by DFT calculation. The important parameters which explain the lithium-ion diffusion will be derived from the function, including the field fluctuation rate and the local field distribution. The calculated results are shown in good agreement with the previously measured field distribution and the field fluctuation rate in LiTi2O4 at the ground state temperature. This method, therefore, may apply to the study of other battery materials. [less ▲]