1,147 research outputs found

    Did the Sephardic Jews Speak Ladino?

    Get PDF
    The term ‚ÄėLadino‚Äô has been used by some scholars in reference to the language spoken by the Sephardic Jews. Sometimes it has been used in reference to the language spoken by the Jews in Medieval Spain while at other times scholars have used this term in reference to the language spoken by the Sephardim of the Ottoman Empire in the centuries following their exile from Spain. Both definitions are listed in the dictionary of the Real Academia Espa√Īola, but is the term accurately defined? This article examines modern and historic uses of the term ‚Äėladino‚Äô and suggests amending the dictionary to better reflect the particular nuances of this term. It also examines the differences between the terms ‚Äėladino‚Äô and ‚Äėjudeoespa√Īol‚Äô (Judeo-Spanish) and clarifies their proper uses

    Electronic Spectra: Topology, Supersymmetry, and Statistics

    Get PDF
    The description of electronic behavior within solids is a major part of modern Condensed Matter Physics. It is well known that depending on the precise conditions, very diverse phenomena arise from the interacting electrons in the material. To make predictions, it is therefore crucial to understand the electronic structure in a material and to compute its electronic spectrum. This thesis discusses three different aspects of electronic spectra including their numerical solution, each highlighting a distinct approach. In a first part, this thesis presents a numerical solution of many-electron spectra on small clusters of IrO6 octahedra. Such clusters are relevant in the field of strongly coupled matter as they give rise to the elementary building blocks of many topological spin systems, localized j = 1/2 moments. Exact diagonalization of the full many-electron interaction Hamiltonian is utilized to compute multi-particle spectra with respective eigenstates. Subsequently, these eigenstates are further used for numerical calculations of resonant inelastic X-ray scattering (RIXS) amplitudes. The numerical approach is versatile enough to be applied to different examples in this thesis, covering single-site RIXS spectra as in Ba2CeIrO6, materials with local clusters like Ba3InIr2O9 and Ba3Ti3‚ąíxIrxO9 and Kitaev materials such as Na2IrO3 and őĪ-RuCl3. In particular, interference effects in the RIXS amplitudes are shown to play a crucial role of determining the nature of delocalized eigenstates in these materials. In a second part, supersymmetry is used to link the spectra of electronic lattice models with bosonic counterparts. To this endeavor, an exact lattice construction is introduced, underlying the supersymmetric identification and providing a visual representation of the supersymmetric matching. As a first instance of the supersymmetric map, it will be shown that models of complex fermions and models of complex bosons are supersymmetrically related if they reside on the two sublattices of a bipartite lattice. Another similar identification is introduced for Majorana fermions on a bipartite lattice which can be related to real boson models on one of the sublattices, allowing for the explicit construction of related mechanical models. As examples of this classical construction, the Kitaev model and a second order topological insulator with floppy corner modes are discussed. In both examples, the supersymmetrically related mechanical model is shown to exhibit the same spectral properties as its quantum mechanical analogue and even inherit topologically protected localized corner modes. In a third part, the electronic spectra of general Moir√© materials are investigated at the example of twisted bilayer graphene. This part demonstrates that statistical principles are best suited to describe the vast number of bands originating from the large Moir√© unit cells. The statistical description reveals a localization mechanism in momentum space which is investigated and described. The mechanism does not only apply to all parts of the spectrum in twisted bilayer graphene but is also believed to apply to generic Moir√© materials. Moreover, exceptions from this general mechanism in twisted bilayer graphene are discussed in detail which turn out to be described by harmonic oscillator states

    Topological Mechanics from Supersymmetry

    Full text link
    In topological mechanics, the identification of a mechanical system's rigidity matrix with an electronic tight-binding model allows to infer topological properties of the mechanical system, such as the occurrence of `floppy' boundary modes, from the associated electronic band structure. Here we introduce an approach to systematically construct topological mechanical systems by an exact supersymmetry (SUSY) that relates the bosonic (mechanical) and fermionic (e.g. electronic) degrees of freedom. As examples we discuss mechanical analogues of the Kitaev honeycomb model and of a second-order topological insulator with floppy corner modes. Our SUSY construction naturally defines hitherto unexplored topological invariants for bosonic (mechanical) systems, such as bosonic Wilson loop operators that are formulated in terms of a SUSY-related fermionic Berry curvature.Comment: 8 pages, 6 figure

    Theorizing Non-Translation Through the Lens of Queer Studies

    Get PDF

    Social Support and New Communication Technologies During a Life Stressor

    Get PDF
    Social support, whether emotional, informational, or tangible (Goldsmith, 2004) is an innate need and is important to our well-being and our personal relationships. While face-to-face communication has been considered the "gold standard" to relational maintenance, we are also using communication technology to maintain our personal relationships and mobilize our social support networks. Technological advances in communication channels have provided new avenues to social interaction and social support. The purpose of this study was to explore the social support process across new communication technologies. Specifically, I examined how multiple modes of communication (including face-to-face) were used to seek and receive social support to/from different relational ties in the midst a life stressor. I also looked at what people did or said to prompt them to use certain communication channels and why. Further, I investigated the types of supportive messages that were being communicated. And, finally, I examined whether those supportive messages were perceived as helpful, or not. Through an in-depth analysis of 23 interviews, results suggested that new communication technologies helped: tell the story, orchestrate tangible support, provide direct and instant access to others, show evidence of quantity, and offer coping outlets. Delving deeper, the results from this project revealed that participants used specific communication channels for specific reasons when in need of support. Last, the results indicated that all three types of social support messages (i.e., emotional, informational, and tangible) were provided to participants via a variety of new communication technologies and relational ties. Moreover, some of the support messages were perceived as helpful, and some were not

    El clock de la estación

    Get PDF
    Fabi√°n Severo‚Äôs collection of short stories, Viralata, from which this short story comes, was originally published in Portu√Īol, a ‚Äúhybrid‚ÄĚ mix of Spanish and Portuguese, as it is spoken near the city of Artigas in northern Uruguay. Portu√Īol, like other ‚Äúhybrid‚ÄĚ border varieties, has rarely been published, though it would seem that interest is growing since the 1990s, particularly in Uruguay. As a scholar of ‚Äúhybrid‚ÄĚ, diaspora, and transnational languages I decided to explore the possibility of translating this work into Spanglish, the ‚Äúhybrid‚ÄĚ mix of Spanish and English commonly heard among Latinxs in the US. Though the cultural realities of Portu√Īol speakers and Spanglish speakers are different, there are some important parallels: literature in both has emerged only relatively recently, little has been translated into either language variety, education is not conducted in either, and the dominant discourses around language in both contexts has traditionally favoured literature written in the prestige varieties of English, Spanish, or Portuguese‚ÄĒwhich should come as no surprise. Given this, I wondered about the experience, aesthetic, and cultural value of putting two distant borders of Spanish in contact through translation. This is my first translation of Fabi√°n Severo‚Äôs work
    • ‚Ķ