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Search Results: 1 - 10 of 223834 matches for " R. Friedlein "
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Metapoetizit t und Textgenese – Ebenen diachronischen Bedeutungswandels bei Joan Maragall: El comte Arnau (1900–1911) [Metapoeticity and textual genesis – Levels of diachronic semantic change in Joan Maragall, El comte Arnau (1900–1911)]
Friedlein, Roger
Zeitschrift für Katalanistik , 2006,
Abstract: The first part of Joan Maragall’s poetical triptych El comte Arnau (1900) has achieved its status of literary myth due to its polysemy, which added a new quality to Catalan poetry at the last turn of the century. In the continuation of the poem (1906), a metapoetical dimension is introduced into Maragall’s version of the traditional story of the Count Arnau. Most importantly, it exhibits the fact that the meaning of poetical texts is subject to historical variability. This is exemplified by a ‘poem within a poem’, the Can ó del comte l’Arnau. The end of the Escòlium, together with the last part of the triptych (1911), brings about a performative effect, thus making it evident for the reader how the meaning of the poem depends on the real time of its genesis. In this way, the diachronic change of signification becomes visible in El comte Arnau on three levels: biographical, metapoetical and performative.
Der Naturraum der Pyren en als Epochenmerkmal für den Modernismus (Caterina Albert: Solitud, 1904–5) [The Pyrenees’ natural space, a characteristic feature within Modernism (Caterina Albert: Solitud, 1904–5)]
Friedlein, Roger
Zeitschrift für Katalanistik , 2004,
Abstract: The natural space of the Pyrenees can be found at the heart of some paradigmatic texts both from the Renaixen a (Verdaguer, Balaguer) and from Modernism (C. Albert). During the Renaixen a it is combined with the Catalan Medieval Ages in order to contribute to the formation of historical national myths. In Modernism, nature’s functionality is modified, which is demonstrated obviously in the Pyrenean novel Solitud (1904/5) by Catarina Albert (pseud. Víctor Català). Víctor Català strips nature of its historical connotations. Unlike the texts from the Renaixen a, the Pyrenees are named with fictitious toponyms and they are used as an example for a natural space that humans have to face and with which they share an essential and individual relation. So the Pyrenees cease to present the famous historic scenery, personification of the home country and space of identification. A place of intraliterary evolution is created: Víctor Català assigns a new function to the fairy tales from the Pyrenees – known through the verdaguerian Canigó – and she puts them into the service of the psychological analysis. The innovation that has been achieved by the modernist prose is due to the fact that human individual dynamics – created thanks to the mountainous nature – have been tackled, while the collective identity topic, that was so characteristic during the Renaixen a, is resituated within another discourse, nowadays particularly political and theoretical.
El Pirineu / Die Pyren en: Einführung in das Schwerpunktthema [The Pyrenees: introduction to this special issue]
Friedlein, Roger
Zeitschrift für Katalanistik , 2004,
Abstract: This introduction gives an overview of the importance of the Pyrenees in the context of Catalan literatures and introduces the articles in this special issue of the journal.
A Robust and Tunable Add-Drop Filter Using Whispering Gallery Mode Microtoroid Resonator
F. Monifi,J. Friedlein,S. K. Ozdemir,L. Yang
Physics , 2013, DOI: 10.1109/JLT.2012.2214026
Abstract: We fabricated and theoretically investigated an add-drop filter using an on-chip whispering gallery mode (WGM) microtoroid resonator with ultra-high quality factor (Q) side coupled to two taper fibers, forming the bus and drop waveguides. The new device design incorporates silica side walls close to the microresonators which not only enable placing the coupling fibers on the same plane with respect to the microtoroid resonator but also provides mechanical stability, leading to an add-drop filter with high drop efficiency and improved robustness to environmental perturbations. We show that this new device can be thermally tuned to drop desired wavelengths from the bus without significantly affecting the drop efficiency, which is around 57%
Encapsulation of a fiber taper coupled microtoroid resonator in a polymer matrix
Faraz Monifi,Sahin Kaya Ozdemir,Jacob Friedlein,Lan Yang
Physics , 2013, DOI: 10.1109/LPT.2013.2266573
Abstract: We encapsulated a high-quality (Q) factor optical whispering gallery mode (WGM) microtoroid resonator together with its side coupled fiber taper inside a low refractive index polymer, achieving a final Q higher than 10^7. Packaging provides stable resonator-fiber taper coupling, long-term maintenance of high-Q, a protective layer against contaminants, and portability to microtoroid resonator based devices. We tested the robustness of the packaged device under various conditions and demonstrated its capability for thermal sensing.
The Wave-Front Correction System for the Sunrise Balloon-Borne Solar Observatory
T. Berkefeld,W. Schmidt,D. Soltau,A. Bell,H. P. Doerr,B. Feger,R. Friedlein,K. Gerber,F. Heidecke,T. Kentischer,O. v. d. Lühe,M. Sigwarth,E. W?lde,P. Barthol,W. Deutsch,A. Gandorfer,D. Germerott,B. Grauf,R. Meller,A. Alvarez-Herrero,M. Kn?lker,V. Martinez Pillet,S. K. Solanki,A. M. Title
Physics , 2010, DOI: 10.1007/s11207-010-9676-3
Abstract: This paper describes the wave-front correction system developed for the Sunrise balloon telescope, and provides information about its in-flight performance. For the correction of low-order aberrations, a Correlating Wave-Front Sensor (CWS) was used. It consisted of a six-element Shack-Hartmann wave-front sensor (WFS), a fast tip-tilt mirror for the compensation of image motion, and an active telescope secondary mirror for focus correction. The CWS delivered a stabilized image with a precision of 0.04 arcsec (rms), whenever the coarse pointing was better than 90 arcsec peak-to-peak. The automatic focus adjustment maintained a focus stability of 0.01 waves in the focal plane of the CWS. During the 5.5 day flight, good image quality and stability was achieved during 33 hours, containing 45 sequences that lasted between 10 and 45 minutes.
Diverse forms of $σ$ bonding in two-dimensional Si allotropes: Nematic orbitals in the $MoS_2$ structure
Florian Gimbert,Chi-Cheng Lee,Rainer Friedlein,Antoine Fleurence,Yukiko Yamada-Takamura,Taisuke Ozaki
Physics , 2013, DOI: 10.1103/PhysRevB.90.165423
Abstract: The interplay of $sp^2$- and $sp^3$-type bonding defines silicon allotropes in two- and three-dimensional forms. A novel two-dimensional phase bearing structural resembleance to a single MoS$_2$ layer is found to possess a lower total energy than low-buckled silicene and to be stable in terms of its phonon dispersion relations. A new set of cigar-shaped, nematic orbitals originating from the Si $sp^2$ orbitals realizes bonding with a 6-fold coordination of the inner Si atoms of the layer. The identification of these nematic orbitals advocates diverse Si bonding configurations different from those of C atoms.
Band structure of silicene on the zirconium diboride (0001) thin film surface - convergence of experiment and calculations in the one-Si-atom Brillouin zone
Chi-Cheng Lee,Antoine Fleurence,Yukiko Yamada-Takamura,Taisuke Ozaki,Rainer Friedlein
Physics , 2014, DOI: 10.1103/PhysRevB.90.075422
Abstract: So far, it represents a challenging task to reproduce angle-resolved photoelectron (ARPES) spectra of epitaxial silicene by first-principles calculations. Here, we report on the resolution of the previously controversial issue related to the structural configuration of silicene on the ZrB$_2$(0001) surface and its band structure. In particular, by representing the band structure in a large Brillouin zone associated with a single Si atom, it is found that the imaginary part of the one-particle Green's function follows the spectral weight observed in ARPES spectra. By additionally varying the in-plane lattice constant, the results of density functional theory calculations and ARPES data obtained in a wide energy range converge into the "planar-like" phase and provide the orbital character of electronic states in the vicinity of the Fermi level. It is anticipated that the choice of a smaller commensurate unit cell for the representation of the electronic structure will be useful for the study of epitaxial two-dimensional materials on various substrates in general.
Avoiding critical-point phonon instabilities in two-dimensional materials: The origin of the stripe formation in epitaxial silicene
Chi-Cheng Lee,Antoine Fleurence,Rainer Friedlein,Yukiko Yamada-Takamura,Taisuke Ozaki
Physics , 2014, DOI: 10.1103/PhysRevB.90.241402
Abstract: The origin of the large-scale stripe pattern of epitaxial silicene on the ZrB$_2$(0001) surface observed by scanning tunneling microscope experiments is revealed by first-principles calculations. Without stripes, the ($\sqrt{3}\times\sqrt{3}$)-reconstructed, one-atom-thick Si layer is found to exhibit a "zero-frequency" phonon instability at the $M$ point. In order to avoid a divergent response, the relevant phonon mode triggers the spontaneous formation of a new phase with a particular stripe pattern offering a way to lower both the atomic surface density and the total energy of silicene on the particular substrate. The observed mechanism is a way for the system to handle epitaxial strain and may therefore be more common in two-dimensional epitaxial materials exhibiting a small lattice mismatch with the substrate.
First-principles study on competing phases of silicene: Effect of substrate and strain
Chi-Cheng Lee,Antoine Fleurence,Rainer Friedlein,Yukiko Yamada-Takamura,Taisuke Ozaki
Physics , 2013, DOI: 10.1103/PhysRevB.88.165404
Abstract: The stability and electronic structure of competing silicene phases under in-plane compressive stress, either free-standing or on the ZrB$_2$(0001) surface, has been studied by first-principles calculations. A particular ($\sqrt{3}\times\sqrt{3}$)-reconstructed structural modification was found to be stable on the ZrB$_2$(0001) surface under epitaxial conditions. In contrast to the planar and buckled forms of free-standing silicene, in this "planar-like" phase, all but one of the Si atoms per hexagon reside in a single plane. While without substrate, for a wide range of strain, this phase is energetically less favorable than the buckled one, it is calculated to represent the ground state on the ZrB$_2$(0001) surface. The atomic positions are found to be determined by the interactions with the nearest neighbor Zr atoms competing with Si-Si bonding interactions provided by the constraint of the honeycomb lattice.
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