cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometric structures in noncommutative emergent gravity
Creators: name: Kuntner, Nikolaj Sebastian
Year: 2011

description: This work is a study of permissible Poisson tensors in noncommutative emergent gravity. In this framework, in contrast to classical general relativity, the spacetime metric is not the fundamental object, but an emergent quantity, which also depends on the function algebra given by these noncommutative structures. A short introduction to the concepts of noncommutative geometry and noncommutative emergent gravity is given. The following investigations are devoted to solutions of the equations of motion for Poisson structures in the semi-classical limit of the so called matrix models of Yang-Mills type. One is naturally interested in solutions which are compatible with certain physical spacetime metrics. General results and a calculation procedure for (i-)(anti-)self-dual solutions are deduced in four spacetime dimensions and Lorentzian signature. This regime is formally analogous to the study of complexified classical electrodynamics on a curved spacetime. A solution on all manifolds which admit a conformally flat metric is computed and other previous results, like a solution for the Schwarzschild metric, are systematically re-derived. Then the higher-dimensional case is considered, where it is demonstrated how the additional degrees of freedom can resolve problems encountered in the four-dimensional case.
description: In der vorliegenden Arbeit werden Poisson-Tensoren im Rahmen von noncommutative emergent gravity-Theorien untersucht. Im Gegensatz zur klassischen allgemeinen Relativitätstheorie ist in diesem Fall nicht die Raumzeit-Metrik das fundamentale Objekt, sondern emergent. Diese hängt von der zugrundeliegenden Funktionenalgebra ab, welche im Poisson-Tensor kodiert ist. Nach einer kurzen Einführung in die noncommutative geometry und noncommutative emergent gravity werden die Bewegungsgleichungen für die Poisson-Tensoren im semi-klassischen Limes des sog. Matrix-Models vom Yang-Mills Typ behandelt. Dabei liegt das Interesse besonders bei bestimmten physikalischen Metrik-Strukturen. Im Hauptteil werden allgemeine Resultate und ein Berechnungsverfahren für (i-)(anti-)selbst-duale Lösungen auf vier-dimensionalen Raumzeiten mit Lorentz-Signatur herausgearbeitet. Dieses Regime ist formal analog zur komplexifizierten klassischen Elektrodynamik auf gekrümmen Raumzeiten. Es wird sodann eine Lösung für alle konform flachen Raumzeiten ermittelt und frühere bekannte Resultate, wie etwa eine Lösung für die Schwarzschild-Metrik, werden im neuen Formulismus wieder entdeckt. Danach wird die Verallgemeinerung auf höherdimensionale Raumzeiten besprochen und aufgezeigt, welche Konsequenzen die zusätzlichen Freiheitsgrade für die aus vier Dimensionen bekannten Problemstellungen haben.
First 450-micron dust continuum mapping of the massive star-forming region NGC 3576 with the P-ArTeMiS bolometer camera
Creators: name: André, P.
name: Minier, V.
name: Gallais, P.
name: Reveret, V.
name: Pennec, J. Le
name: Rodriguez, L.
name: Boulade, O.
name: Doumayrou, E.
name: Dubreuil, D.
name: Lortholary, M.
name: Martignac, J.
name: Talvard, M.
name: De Breuck, C.
name: Hamon, G.
name: Schneider, N.
name: Bontemps, S.
name: Lagage, P. O.
name: Pantin, E.
name: Roussel, H.
name: Miller, M.
name: Purcell, C. R.
name: Hill, T.
name: Stutzki, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The earliest phases of massive star formation are currently much debated. Aims. In an effort to make progress, we took a census of Class0-like protostellar dense cores in the NGC 3576 region, one of the nearest and most luminous embedded sites of high-mass star formation in the Galaxy. Methods: We used the P-ArTeMiS bolometer camera on the APEX telescope to produce the first 450-micron dust continuum map of the filamentary dense clump associated with NGC 3576. Results: Combining our 450-micron observations with existing data at other wavelengths, we have identified seven massive protostellar sources along the NGC 3576 filament and placed them in the M_env - L_bol evolutionary diagram for protostars. Conclusions: Comparison with theoretical evolutionary tracks suggests that these seven protostellar sources will evolve into massive stars with masses M* ~ 15-50 Msun. Four sources are classified as candidate high-mass Class 0 objects, two sources as massive Class I objects, and one source appears to be at an intermediate stage.
description: 9 pages, 2 figures + 2 online figures, 2 online tables. Accepted for publication in A&A (Letters)
Chemical signatures of a warped protoplanetary disc
Creators: name: Young, Alison K.
name: Alexander, Richard
name: Walsh, Catherine
name: Nealon, Rebecca
name: Booth, Alice
name: Pinte, Christophe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Circumstellar discs may become warped or broken into distinct planes if there is a stellar or planetary companion with an orbit that is misaligned with respect to the disc. There is mounting observational evidence for protoplanetary discs with misaligned inner discs and warps that may be caused by such interactions with a previously undetected companion, giving us a tantalising indication of possible planets forming there. Hydrodynamical and radiative transfer models indicate that the temperature varies azimuthally in warped discs due to the variable angle at which the disc surface faces the star and this impacts the disc chemistry. We perform chemical modelling based on a hydrodynamical model of a protoplanetary disc with an embedded planet orbiting at a 12$^{\circ}$ inclination to the disc. Even for this small misalignment, abundances of species including CO and HCO$^+$ vary azimuthally and this results in detectable azimuthal variations in submillimetre line emission. Azimuthal variations in line emission may therefore indicate the presence of an unseen embedded companion. Nonaxisymmetric chemical abundances should be considered when interpreting molecular line maps of warped or shadowed protoplanetary discs.
description: Accepted to MNRAS. 18 pages, 14 figures
Braiding and entanglement in spin networks: a combinatorial approach to topological phases
Creators: name: Kadar, Zoltan
name: Marzuoli, Annalisa
name: Rasetti, Mario
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spin network quantum simulator relies on the su(2) representation ring (or its q-deformed counterpart at q= root of unity) and its basic features naturally include (multipartite) entanglement and braiding. In particular, q-deformed spin network automata are able to perform efficiently approximate calculations of topological invarians of knots and 3-manifolds. The same algebraic background is shared by 2D lattice models supporting topological phases of matter that have recently gained much interest in condensed matter physics. These developments are motivated by the possibility to store quantum information fault-tolerantly in a physical system supporting fractional statistics since a part of the associated Hilbert space is insensitive to local perturbations. Most of currently addressed approaches are framed within a 'double' quantum Chern-Simons field theory, whose quantum amplitudes represent evolution histories of local lattice degrees of freedom. We propose here a novel combinatorial approach based on `state sum' models of the Turaev-Viro type associated with SU(2)_q-colored triangulations of the ambient 3-manifolds. We argue that boundary 2D lattice models (as well as observables in the form of colored graphs satisfying braiding relations) could be consistently addressed. This is supported by the proof that the Hamiltonian of the Levin-Wen condensed string net model in a surface Sigma coincides with the corresponding Turaev-Viro amplitude on Sigma x [0,1] presented in the last section.
description: Contributed to Quantum 2008: IV workshop ad memoriam of Carlo Novero 19-23 May 2008 - Turin, Italy
Mit der Berufsreifeprüfung zur Matura
Creators: name: Pani, Victoria
Year: 2011

description: Die vorliegende Diplomarbeit widmet sich der Berufsreifeprüfung. Diese Form der Weiterbildung entspricht dem Erwerb der Matura im zweiten Bildungsweg und setzt somit eine Erstausbildung wie Lehre oder berufsbildende mittlere Schule voraus. Die theoretische Bearbeitung dieses Themas setzt sich mit Weiterbildung und deren Funktion auseinander. Nicht weniger wichtig erscheint in diesem Kontext Allgemeines über Bildung, Bildungsungleichheit und Bildungsexpansion zu erläutern. Auch Bourdieus Auffassung von Bildung als Kapital wird ausreichend diskutiert. Darüber hinaus soll der Lebenslauf von Individuen, dessen Institutionalisierung und spätere Individualisierung in den Blickpunkt geraten. Im empirischen Teil dieser Diplomarbeit findet die Auswertung des Online-Fragebogens (N=119) statt. Es werden Fragestellungen zu den folgenden Themenbereichen (auszugsweise) beantwortet: Wie können die BRP-KandidatInnen hinsichtlich Vorbildung und Erwerbstätigkeit charakterisiert werden? Wie ist das Bildungsniveau der Herkunftsfamilie der Befragten? Welche Motivationstypen der Weiterbildung können identifiziert werden? Welche beruflichen Veränderungen erwarten die BRP-TeilnehmerInnen nach erfolgreichem Abschluss? Wie wichtig ist die BRP als Möglichkeit des Hochschulzugangs? Wie können die Lebenssituation und die Statuspassage im Lebenslauf beschrieben werden? Die Auswertung erfolgt mit statistischen Methoden. Hier kommen uni-, bi- und multivariate Analysen zum Einsatz. So wird beispielsweise eine Clusteranalyse über die Einstellung der Befragten zur Ablegung der BRP durchgeführt. Auch faktoranalytische Verfahren kommen zum Einsatz.
Interfacing a high-level graphics language with the GSPC machine model
Creators: name: Mannhardt, Christian
Publisher: name: University of British Columbia
Year: 2010

description: Recent efforts in computer graphics to design a graphics standard have contributed much towards the conceptual clarification of basic operations such as modelling, display and transformation functions. This thesis discusses how such concepts are reflected in a high-level graphics language with the aim of providing a tool to write effective and readable application programs. The high-level language is a graphics extension to Pascal. An interface is described how the multi-level graphics modelling system is mapped onto a single-level display system. The particular display system considered is the Core System which is proposed as a graphics standard by the SIGGRAPH-ACM Graphic Standards Planning Committee (GSPC).
Theory of the Magnon Parametron
Creators: name: Elyasi, Mehrdad
name: Saitoh, Eiji
name: Bauer, Gerrit E. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The 'magnon parametron' is a ferromagnetic particle that is parametrically excited by microwaves in a cavity. Above a certain threshold of the microwave power, a bistable steady state emerges that forms an effective Ising spin. We calculate the dynamics of the magnon parametron as a function of microwave power, applied magnetic field and temperature for the interacting magnon system, taking into account thermal and quantum fluctuations. We predict three dynamical phases, viz. a stable Ising spin, telegraph noise of thermally activated switching, and an intermediate regime that at lower temperatures is quantum correlated with significant distillible magnon entanglement. These three regimes of operation are attractive for alternative computing schemes.
Integral Field Spectroscopy of HH 262: The Spectral Atlas
Creators: name: Lopez, R.
name: Garcia-Lorenzo, B.
name: Sanchez, S. F.
name: Gomez, G.
name: Estalella, R.
name: Riera, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: HH 262 is a group of emitting knots displaying an "hour-glass" morphology in the Halpha and [SII] lines, located 3.5' to the northeast of the young stellar object L1551-IRS5, in Taurus. We present new results of the kinematics and physical conditions of HH 262 based on Integral Field Spectroscopy covering a field of 1.5'x3', which includes all the bright knots in HH 262. These data show complex kinematics and significant variations in physical conditions over the mapped region of HH 262 on a spatial scale of <3". A new result derived from the IFS data is the weakness of the [NII] emission (below detection limit in most of the mapped region of HH 262), including the brightest central knots. Our data reinforce the association of HH 262 with the redshifted lobe of the evolved molecular outflow L1551-IRS5. The interaction of this outflow with a younger one, powered by L1551 NE, around the position of HH 262 could give rise to the complex morphology and kinematics of HH 262.
description: Accepted for publication in MNRAS
Strong perpendicular velocity-space in proton beams observed by Parker Solar Probe
Creators: name: Verniero, J. L.
name: Chandran, B. D. G.
name: Larson, D. E.
name: Paulson, K.
name: Alterman, B. L.
name: Badman, S.
name: Bale, S. D.
name: Bonnell, J. W.
name: Bowen, T. A.
name: de Wit, T. Dudok
name: Kasper, J. C.
name: Klein, K. G.
name: Lichko, E.
name: Livi, R.
name: McManus, M. D.
name: Rahmati, A.
name: Verscharen, D.
name: Walters, J.
name: Whittlesey, P. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The SWEAP instrument suite on Parker Solar Probe (PSP) has detected numerous proton beams associated with coherent, circularly polarized, ion-scale waves observed by PSP's FIELDS instrument suite. Measurements during PSP Encounters 4-8 revealed pronounced complex shapes in the proton velocity distribution functions (VDFs), in which the tip of the beam undergoes strong perpendicular diffusion, resulting in VDF level contours that resemble a `hammerhead.' We refer to these proton beams, with their attendant `hammerhead' features, as the ion strahl. We present an example of these observations occurring simultaneously with a 7-hour ion-scale wave storm and show results from a preliminary attempt at quantifying the occurrence of ion-strahl broadening through 3-component ion-VDF fitting. We also provide a possible explanation of the ion perpendicular scattering based on quasilinear theory and the resonant scattering of beam ions by parallel-propagating, right circularly polarized, fast-magnetosonic/whistler waves.
description: 13 pages, 8 figures, Under Review in the Astrophysical Journal
One-loop $β$ functions of a translation-invariant renormalizable noncommutative scalar model
Creators: name: Geloun, Joseph Ben
name: Tanasa, Adrian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 76F30; 81T75; 46L65; 53D55

description: Recently, a new type of renormalizable $ϕ^{\star 4}_{4}$ scalar model on the Moyal space was proved to be perturbatively renormalizable. It is translation-invariant and introduces in the action a $a/(θ^2p^2)$ term. We calculate here the $β$ and $γ$ functions at one-loop level for this model. The coupling constant $β_λ$ function is proved to have the same behaviour as the one of the $ϕ^4$ model on the commutative $\mathbb{R}^4$. The $β_a$ function of the new parameter $a$ is also calculated. Some interpretation of these results are done.
description: 13 pages, 3 figures
Geometric idealizers
Creators: name: Sierra, Susan J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Rings and Algebras (math.RA)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 16S38

description: Let X be a projective variety, $σ$ an automorphism of X, L a $σ$-ample invertible sheaf on X, and Z a closed subscheme of X. Inside the twisted homogeneous coordinate ring $B = B(X, L, σ)$, let I be the right ideal of sections vanishing at Z. We study the subring R = k + I of B. Under mild conditions on Z and $σ$, R is the idealizer of I in B: the maximal subring of B in which I is a two-sided ideal. We give geometric conditions on Z and $σ$ that determine the algebraic properties of R, and show that if Z and $σ$ are sufficiently general, in a sense we make precise, then R is left and right noetherian, has finite left and right cohomological dimension, is strongly right noetherian but not strongly left noetherian, and satisfies right $χ_d$ (where d = \codim Z) but fails left $χ_1$. We also give an example of a right noetherian ring with infinite right cohomological dimension, partially answering a question of Stafford and Van den Bergh. This generalizes results of Rogalski in the case that Z is a point in $\mathbb{P}^d$.
description: 43 pages; comments welcome
Faint Galactic X-ray Binaries
Creators: name: Jonker, P. G.
name: Torres, M. A. P.
name: Steeghs, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a short overview of the properties of faint Galactic X-ray binaries. We place emphasis on current classification scenarios. One of the important parameters for the faint sources is their intrinsic luminosity. In the case of low-mass X-ray binaries it has recently been realised that besides a phase of radius expansion, the duration of type I X-ray bursts can be used as a primer for the source luminosity in some cases. Further, we show that a very low equivalent width of hydrogen and helium emission lines in the optical spectrum alone is not a tell-tale sign for an ultra-compact system. Finally, we list and discuss some unusual sources that could be X-ray binaries.
description: 8 pages, published in the proceedings of "A population Explosion", AIP Conference Proceedings Volume 1010, pp. 109-116
Tuning flux-pinning in epitaxial NdBa2Cu3O7-x films via engineered, hybrid nanoscale defect structures
Creators: name: Wee, Sung Hun
name: Goyal, Amit
name: Zuev, Yuri L.
name: Cantoni, Claudia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Epitaxial NdBa2Cu3O7-x films with a hybrid nanoscale defect structure comprised of BaZrO3 nanodot arrays aligned along the c-axis in one half of the film thickness and aligned perpendicular to the c-axis in the other half thickness of the film were fabricated. Transmission electron microscopy images confirm the orientation of the nanoscale defect structures. The angular dependence of critical current density, Jc, at 77 K, 1 T, shows significantly reduced angular variation of Jc. This study nicely demonstrates how pinning characteristics can be tuned by tuning the nanoscale defect structures within the films.
description: 13 pages, 3figures, submitted to Applied Physics Express
A Latency-Aware Real-Time Video Surveillance Demo: Network Slicing for Improving Public Safety
Creators: name: Shariati, B.
name: Pedreno-Manresa, J. J.
name: Dochhan, A.
name: Muqaddas, A. S.
name: Casellas, R.
name: de Dios, O. González
name: Canto, L. L.
name: Lent, B.
name: de Vergara, J. E. López
name: López-Buedo, S.
name: Moreno, F. J.
name: Pavón, P.
name: Velasco, L.
name: Patri, S.
name: Giorgetti, A.
name: Cugini, F.
name: Sgambelluri, A.
name: Nejabati, R.
name: Simeonidou, D.
name: R
name: -P
name: Braun
name: Autenrieth, A.
name: Elbers, J. -P.
name: Fischer, J. K.
name: Freund, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We report the automated deployment of 5G services across a latency-aware, semidisaggregated, and virtualized metro network. We summarize the key findings in a detailed analysis of end-to-end latency, service setup time, and soft-failure detection time.
description: The research leading to these results has received funding from the EC and BMBF through the METRO-HAUL project (G.A. No. 761727) and OTB-5G+ project (reference No. 16KIS0979K)
Dynamics of strong and radiative decays of Ds mesons
Creators: name: Soyeur, Madeleine
name: Lutz, Matthias F. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The positive parity scalar D$_{s0}^*$(2317) and axial-vector D$_{s1}^*$(2460) charmed strange mesons are generated by coupled-channel dynamics through the s-wave scattering of Goldstone bosons off the pseudoscalar and vector D(D$_s$)-meson ground states. The attraction leading to the specific masses of these states reflects the chiral symmetry breaking scale which characterizes the Weinberg-Tomozawa interaction in the chiral Lagrangian. Chiral corrections to order Q$_χ^2$ are calculated and found to be small. The D$_{s0}^*$(2317) and D$_{s1}^*$(2460) mesons decay either strongly into the isospin-violating $π^0$D$_s$ and $π^0$D$_s^*$ channels or electromagnetically. We show that the $π^0$-$η$ and (K$^0$D$^+$-K$^+$D$^0$) mixings act constructively to generate strong widths of the order of 140 keV. The one-loop contribution to the radiative decay amplitudes of scalar and axial-vector states is calculated using the electromagnetic Lagrangian to chiral order Q$_χ^2$. We show the importance of taking into account processes involving light vector mesons explicitly in the dynamics of electromagnetic decays to obtain a satisfactory description of the available data.
description: Contribution to the Meson 2008 Conference, June 6-10, Cracow, Poland
Van-der-Waals potentials of paramagnetic atoms
Creators: name: Safari, Hassan
name: Welsch, Dirk-Gunnar
name: Buhmann, Stefan Yoshi
name: Scheel, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study single- and two-atom van der Waals interactions of ground-state atoms which are both polarizable and paramagnetizable in the presence of magneto-electric bodies within the framework of macroscopic quantum electrodynamics. Starting from an interaction Hamiltonian that includes particle spins, we use leading-order perturbation theory for the van der Waals potentials expressed in terms of the polarizability and magnetizability of the atom(s). To allow for atoms embedded in media, we also include local-field corrections via the real-cavity model. The general theory is applied to the potential of a single atom near a half space and that of two atoms embedded in a bulk medium or placed near a sphere, respectively.
description: 18 pages, 3 figures, 1 table
Relativistically transparent magnetic filaments: scaling laws, initial results and prospects for strong-field QED studies
Creators: name: Rinderknecht, H. G.
name: Wang, T.
name: Garcia, A. Laso
name: Bruhaug, G.
name: Wei, M. S.
name: Quevedo, H. J.
name: Ditmire, T.
name: Williams, J.
name: Haid, A.
name: Doria, D.
name: Spohr, K.
name: Toncian, T.
name: Arefiev, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Relativistic transparency enables volumetric laser interaction with overdense plasmas and direct laser acceleration of electrons to relativistic velocities. The dense electron current generates a magnetic filament with field strength of the order of the laser amplitude ($>$10$^5$ T). The magnetic filament traps the electrons radially, enabling efficient acceleration and conversion of laser energy into MeV photons by electron oscillations in the filament. The use of microstructured targets stabilizes the hosing instabilities associated with relativistically transparent interactions, resulting in robust and repeatable production of this phenomenon. Analytical scaling laws are derived to describe the radiated photon spectrum and energy from the magnetic filament phenomenon in terms of the laser intensity, focal radius, pulse duration, and the plasma density. These scaling laws are compared to 3-D particle-in-cell (PIC) simulations, demonstrating agreement over two regimes of focal radius. Preliminary experiments to study this phenomenon at moderate intensity ($a_0 \sim 30$) were performed on the Texas Petawatt Laser. Experimental signatures of the magnetic filament phenomenon are observed in the electron and photon spectra recorded in a subset of these experiments that is consistent with the experimental design, analytical scaling and 3-D PIC simulations. Implications for future experimental campaigns are discussed.
description: Submitted to New Journal of Physics
Sozialanthropologisch - archäologische Bedeutung von ausgewählten Steinartefakten abseits der Moai auf Rapa Nui
Creators: name: Eder, Irina
Year: 2011

description: The present thesis deals with the socio-anthropological and archaeological significance of small, portable stone sculptures on Rapa Nui which existed apart from the megalithic culture of the moai. These stone sculptures are today found in the lapidary of the Museum of Ethnology Vienna and the Kon Tiki Museum in Oslo and have presumably been manufactured in the last two centuries on Rapa Nui. Their significance is connected with the socio-cultural and religious contexts of Rapa Nui and Polynesia. In this thesis, motifs and stylistic designs of the sculptures were compared to the descriptions in the existing scientific literature of the 20th and 21st century and brought into context with existing theories. The achieved results provide evidence of a concentration of the motifs on the depiction of different images of the Creator God of the Rapanui. This Creator God is called Make Make. Associated with the stylistic elements of Make Make is the emphasis on the depiction of eyes, eyebrows and nose, which are found in petroglyphs, the rock paintings, or the small stone artifacts of Rapa Nui. The information gained from the scientific literature is finally applied in the practical part of this thesis, in which two research projects at the Museum of Ethnology in Vienna and the Kon Tiki Museum in Oslo are placed in connection with the theory and the objects, for an identification of the small stone artifacts.
description: Die vorliegende Arbeit beschäftigt sich mit der sozialanthropologischen und archäologischen Bedeutung von kleinen, tragbaren Steinskulpturen, die auf Rapa Nui abseits der Megalithkultur der Moai entstanden sind. Diese Steinskulpturen befinden sich heute in den Lapidarien des Museums für Völkerkunde Wien und es Kon Tiki Museums Oslo und wurden vermutlich in den letzten zwei Jahrhunderten auf Rapa Nui hergestellt. Ihre Bedeutung ist mit den soziokulturellen wie religiösen Kontexten Rapa Nuis und Polynesiens verbunden. In dieser Arbeit wurden die Motive und stilistischen Ausformungen der Skulpturen mit der bestehenden wissenschaftlichen Literatur des 20. und 21. Jahrhunderts in Zusammenhang gebracht und in einem Vergleich mit den bestehenden Theorien dargestellt. Die daraus resultierenden Ergebnisse geben Hinweis auf eine Konzentration der dargestellten Motive auf die verschiedenen Abbildungen des Schöpfergottes der Rapanui. Dieser Schöpfergott wird Make Make genannt. Die mit Make Make zusammenhängenden stilistischen Elemente der betonten Augen, Augenbrauen und Nase finden sich in den Petroglyphen, den Malereien oder den kleinen Steinartefakten Rapa Nuis wieder. Die aus der wissenschaftlichen Literatur erworbenen Informationen finden im praktischen Teil ihre Anwendung, in welchem zwei Objektforschungsprojekte an dem Museum für Völkerkunde Wien und dem Kon Tiki Museum Oslo vorgestellt und mit der Theorie und den Objekten in Verbindung gesetzt werden, um eine Identifikation der kleinen Steinartefakte zu ermöglichen.
IC Design Insights From Selected Presentations at CICC 2017
Creators: Ali Sheikholeslami
Jan Van der Spiegel
and Yanjie Wang
Publisher: name: IEEE
Year: 2019

IC Design Insights eBook
This book contains a selection of tutorial and invited presentations that were given at the IEEE CICC 2017 in Austin, TX. The selection of the talks was made to provide a comprehensive coverage of key topics, including Circuits Techniques for mm-wave front-ends, RF and mm-wave receivers and frequency synthesis, data and DC-DC converters, and techniques for IoT security. The book is part of an educational initiative of the IEEE Solid-State Circuits Society to offer its members state of the art educational material.
Vor-/Urteile von LehrerInnen gegenüber besonderen SchülerInnengruppen und deren Bedeutung für das Abschneiden bei PISA
Creators: name: Ostojic, Dejan
Year: 2011

description: Die vorliegende Studie hatte zum Ziel die Rolle von impliziten Vorurteilen und expliziten Urteilen von Lehrpersonen hinsichtlich der derzeit viel diskutieren Bildungsmisserfolge von sozial schwachen und migrantischen SchülerInnen bei PISA zu untersuchen. Mittels Online-Fragebogen wurden diese Bereiche anhand von Lehrpersonen verschiedener Schultypen aus ganz Österreich untersucht. Es konnten drei Fragestellungen geklärt werden: (1) Es konnte gezeigt werden, dass Lehrpersonen (n = 223) implizite Vorurteile gegenüber den beiden SchülerInnengruppen hegen. Anhand von Assoziationen zu Vornamen konnte nachgewiesen werden, dass Lehrpersonen SchülerInnen aus sozial schwachen und migrantischen Familien schlechter bzw. negativer hinsichtlich bildungsrelevanten Merkmalen einschätzen, als SchülerInnen, bei denen ein sozial starker Hintergrund angenommen wird. Es konnten auch Einflüsse der Schulformen und der Dienstjahre auf die Bewertung gefunden werden. (2) Weiters konnte durch die expliziten Urteile zu den Bildungsmisserfolgen jener SchülerInnengruppen bei PISA ein problematisches externes Attributionsmuster seitens der Lehrpersonen (n = 304) aufgezeigt werden. Sie schätzen den eigenen Betrag bei den Ergebnissen bei PISA sehr gering ein und jenen der Eltern und der SchülerInnen hoch ein. (3) Es konnte auch gezeigt werden, dass es hinsichtlich der Ursachenattribution bestimmter Dimensionen Unterschiede zwischen den Schulformen gibt. LehrerInnen aus Haupt- und Sonderschulen stimmen Eltern und SchülerInnen als Ursache häufiger zu als LehrerInnen aus der AHS.
3D Technologies: Flexible Architectures and Brain-inspired Computing Slides
Creators: Edith Beigne
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
Embedded circuits and systems are facing today power issues due to technology scaling and many different variations sources. Flexibility and dynamic adaptation is required at circuit, system and technology levels to achieve high energy efficiency. This talk is focusing 3D technologies as a key enabler for flexibility and new architectural innovations, improving circuits overall performances. After a brief overview of available 3D technologies, new 3D flexible architectures are presented for digital and imager circuits. Learning and embedded intelligence using 3D is addressed as a promising perspective for 3D technologies.

Speaker Biography
Edith Beigne joined CEA-LETI, Grenoble, France, in 1998. She is the Research Director of Integrated Circuits and System Division at CEA LETI. Since 2009, she has been a senior scientist in the digital and mixed-signal design lab where she researches low power and adaptive circuit techniques, exploiting asynchronous design and advanced technology nodes like FDSOI 28nm and 14nm for many different applications from high performance MPSoC to ultra-low power IoT applications. Her main research interests today are low power digital circuits, neuro-inspired architectures and 3D integration. She is part of ISSCC TPC since 2014 and part of VLSI symposium since 2015. Distinguished Lecturer for the SSCS in 2016 and 2017, Women-in-Circuits Committee chair and JSSC Associate Editor since 2018.
Volatile and Non-Volatile Memory Design Methods Transcript
Creators: Fatih Hamzaoglu
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
Several versions of memory technologies have been implemented in today�s processor units and systems. Each have different specs for multiple level of utilizations. SRAM is preferred for embedded fast memory near processor unit, where (embedded) DRAM at the next level since it�s slower but denser than SRAM. On the other hand, NAND Flash has been the choice for Storage non-volatile memory due to its superb density and cost. Meanwhile, new memory technologies such as STTRAM and RRAM are emerging to compete with all types of volatile and non-volatile memory types due to its either density or lower power.

Speaker Biography
Fatih Hamzaoglu (SM 11) received the B.Sc. degree from the Middle East Technical University, Ankara, Turkey, in 1996, the M.S. degree from Clemson University, Clemson, SC, in 1998, and the Ph.D. degree from the University of Virginia, Charlottesville, in 2002, all in Electrical Engineering. After finishing the Ph.D., he joined Portland Technology Development, Intel Corporation, and since then, he has been working on low-power high-performance memory designs, including SRAM, DRAM and Non-Volatile Memories. Currently, he�s a Principal Engineer and leading the High Density Memory Group at Intel Corporation.
He is the author or coauthor of more than 30 papers and inventor or co-inventor of more than 15 patents. Dr. Hamzaoglu participated in reviewing papers for VLSI SYMPOSIUM, IEEE JOURNAL OF SOLID STATE CIRCUITS, IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS, IEEE TRANSACTIONS ON VLSI.
Detecting mid-infrared light by molecular frequency upconversion with dual-wavelength hybrid nanoantennas
Creators: name: Xomalis, Angelos
name: Zheng, Xuezhi
name: Chikkaraddy, Rohit
name: Koczor-Benda, Zsuzsanna
name: Miele, Ermanno
name: Rosta, Edina
name: Vandenbosch, Guy A E
name: Martínez, Alejandro
name: Baumberg, Jeremy J
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Coherent interconversion of signals between optical and mechanical domains is enabled by optomechanical interactions. Extreme light-matter coupling produced by confining light to nanoscale mode volumes can then access single mid-infrared (MIR) photon sensitivity. Here we utilise the infrared absorption and Raman activity of molecular vibrations in plasmonic nanocavities to demonstrate frequency upconversion. We convert λ~10 μm incoming light to visible via surface-enhanced Raman scattering (SERS) in doubly-resonant antennas that enhance upconversion by >10^10. We show >200% amplification of the SERS antiStokes emission when a MIR pump is tuned to a molecular vibrational frequency, obtaining lowest detectable powers ~1 μW/μm^2 at room temperature. These results have potential for low-cost and large-scale infrared detectors and spectroscopic techniques, and bring single-molecule sensing into the infrared
Introduction to mmWave Phased-Array Transceivers for 5G Applications Slides
Creators: Stefano Pellerano
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
In this short talk, the fundamental concepts of mmWave phased-array transceivers for 5G applications are introduced. Considerations of path-loss at mmWave are presented. The basic principles of beamforming and beamsteering for phased-arrays are shown. The talk concludes with link budget considerations for phased-array systems and high-level trade-offs for few transceiver architectures that implement beamforming, in terms of power consumption, area, linearity and general capabilities.

Biography
Stefano Pellerano is a principal engineer at Intel Labs, leading the Next Generation Radio Integration Lab. He drives several research activities focused at enabling radio circuit integration in deeply-scaled CMOS technologies.

Since joining Intel Labs in 2004, Stefano worked on MIMO transceivers for WiFi, digital PLLs, high-efficient digital architectures for polar and outphasing transmitters, mm-wave radio transceiver and phased-array systems, and low-power radios. His latest research interests also include cryogenic CMOS integrated electronics for qubit control in fault tolerant scalable quantum computers.
Before joining Intel, Stefano got his Laurea and PhD degrees from Politecnico di Milano, Italy, in 2000 and 2004 respectively, after an internship in 2003 with Agere System (former Bell Labs) in Allentown, PA. His PhD thesis focused on the design of fully-integrated low-power frequency synthesizers for WLAN applications.

Stefano has authored or co-authored more than 40 IEEE conference and journal papers, one book chapter and more than 15 issued patents.  He is currently the Wireless Subcommittee Chair of the International Solid-State Circuit Conference (ISSCC) and the TPC Chair of the Radio Frequency Integrated Circuit (RFIC) Symposium for 2018.
Volatile and Non-Volatile Memory Design Methods Slides
Creators: Fatih Hamzaoglu
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
Several versions of memory technologies have been implemented in today�s processor units and systems. Each have different specs for multiple level of utilizations. SRAM is preferred for embedded fast memory near processor unit, where (embedded) DRAM at the next level since it�s slower but denser than SRAM. On the other hand, NAND Flash has been the choice for Storage non-volatile memory due to its superb density and cost. Meanwhile, new memory technologies such as STTRAM and RRAM are emerging to compete with all types of volatile and non-volatile memory types due to its either density or lower power.

Speaker Biography
Fatih Hamzaoglu (SM 11) received the B.Sc. degree from the Middle East Technical University, Ankara, Turkey, in 1996, the M.S. degree from Clemson University, Clemson, SC, in 1998, and the Ph.D. degree from the University of Virginia, Charlottesville, in 2002, all in Electrical Engineering. After finishing the Ph.D., he joined Portland Technology Development, Intel Corporation, and since then, he has been working on low-power high-performance memory designs, including SRAM, DRAM and Non-Volatile Memories. Currently, he�s a Principal Engineer and leading the High Density Memory Group at Intel Corporation.
He is the author or coauthor of more than 30 papers and inventor or co-inventor of more than 15 patents. Dr. Hamzaoglu participated in reviewing papers for VLSI SYMPOSIUM, IEEE JOURNAL OF SOLID STATE CIRCUITS, IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS, IEEE TRANSACTIONS ON VLSI.
Teleportation with a cubic phase gate
Creators: name: Zinatullin, E. R.
name: Korolev, S. B.
name: Golubeva, T. Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a modified quantum teleportation scheme to increase the teleportation accuracy by applying a cubic phase gate to the displaced squeezed state. We have described the proposed scheme in Heisenberg's language, evaluating it from the point of view of adding an error in teleportation, and have shown that it allows achieving less error than the original scheme. Repeating the description in the language of wave functions, we have found the range of the displacement values, at which our conclusions will be valid. Using the example of teleportation of the vacuum state, we have shown that the scheme allows one to achieve high fidelity values.
Chip-to-Chip Wireline Communication Transcript
Creators: Frank O'Mahony
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
This presentation is an introduction to chip-to-chip wireline communication. It starts by discussing how wireline links, or SerDes, are used within data center and supercomputer applications. It summarizes the data rate scaling trend for several SerDes industry standards and explains why per-lane data rates have scaled exponentially over the past two decades. Next it introduces the concept of channel characteristics in the frequency and time domains and provides an overview of common SerDes link architectures focusing on equalization techniques. It discusses the primary tradeoffs for scaling data rate, including interconnect distance, channel loss and power. The presentation then introduces several emerging trends in SerDes architecture, including PAM-4 modulation and analog-to-digital converter (ADC)-based receivers. It concludes by providing examples of SerDes transceivers from ISSCC 2018 that cover a range of data rates (up to 112Gb s), interconnect reach and architectures.

Speaker Biography
Frank currently leads the I O Circuit Technology group within Advanced Design at Intel in Hillsboro, Oregon, where he is a Senior Principal Engineer. His group develops the first wireline I O circuits for each new CMOS process technology. From 2003 until 2011 he was a member of the Signaling Research group in Intel�s Circuit Research Lab. His research interests include high-speed and low-power transceivers, clock generation and distribution, equalization, analog circuit scaling, and on-die measurement techniques. Frank received the BS, MS, and PhD degrees in electrical engineering from Stanford University. Frank is currently the chair of the ISSCC Wireline Subcommittee and previously served as an Associate Editor for TCAS-I. Since 2003 he has published over 40 papers in peer-reviewed conferences and journals on the topic of wireline transceivers and clocking. He has received the ISSCC Jack Kilby Award, IEEE Journal on Solid-State Circuits Best Paper Award and TCAS Darlington Best Paper Award. He has also served as an IEEE Distinguished Lecturer.
mm-Wave Front-End Circuits Slides
Creators: John Long
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
Key elements in an millimeter-wave frequecy transceiver front-end, from system to transistor-level circuits are outlined in this lecture. An overview of phased-array receiver architectures is presented, showing how signal combining may be implemented in the front-end, after mixing, or at baseband. Transceiver circuit examples include: neutralization, noise canceling wideband amplifiers, switching mixers used in
mixer-first receivers, optimization of on-chip tank-Q and LC-voltage-controlled oscillators, and the Doherty scheme for efficiency improvement in RF power amplifiers.

Speaker Biography
John R. Long received the B.Sc. in Electrical Engineering from the University of Calgary in 1984, and the M.Eng. and Ph.D. degrees in Electronics from Carleton University, Ottawa, Canada, in 1992 and 1996, respectively. He worked for 12 years in the Advanced Technology Laboratory at Bell-Northern Research in Ottawa, and then began his academic career at the University of Toronto (1996-2002). From 2002-2014 he was Chair of the Electronics Research Laboratory at TU Delft in the Netherlands. He has been a faculty member in the Department of Electrical and Computer Engineering at the University of Waterloo since 2015. His current research interests include low-power and broadband circuits for highly-integrated wireless transceivers, energy-efficient wireless sensors, and IC design for mm-wave and high-speed data communication.
Chopper Amplifiers Demystified Slides
Creators: Kofi Makinwa
Publisher: name: IEEE
Year: 2018

ISSCCedu Training
Abstract
In CMOS amplifiers, component mismatch can easily give rise to offsets of several millivolts. However, this can be reduced to the microvolt level by the application of chopping. Compared to the alternatives, i.e. increasing device area or trimming, the use of chopping has the added advantage of also suppressing 1/f noise and drift. In this webinar, a high-speed introduction to the fundamentals of chopping will be given.

Speaker Biography
Kofi A. A. Makinwa (M�97�SM�05�F�11) received the B.Sc. and M.Sc. degrees from Obafemi Awolowo University, Ife, Nigeria, in 1985 and 1988, respectively, the M.E.E. degree from the Philips International Institute, Eindhoven, The Netherlands, in 1989, and the Ph.D. degree from Delft University of Technology, Delft, The Netherlands, in 2004.

From 1989 to 1999, he was a Research Scientist with Philips Research Laboratories, Eindhoven, The Netherlands, where he worked on interactive displays and digital recording systems. In 1999, he joined the Delft University of Technology, where he is currently an Antoni van Leeuwenhoek Professor and Head of the Microelectronics Department. He has authored 15 books and over 250 technical papers, and holds 26 patents. His research interests include the design of mixed-signal circuits, sensor interfaces and smart sensors.

Dr. Makinwa is the Analog Subcommittee Chair of the International Solid-State Circuits Conference (ISSCC). He also serves on the program committees of the VLSI Symposium, the European Solid-State Circuits Conference (ESSCIRC), and the Advances in Analog Circuit Design (AACD) workshop. He has been a three-time Guest Editor of the Journal of Solid-State Circuits (JSSC) and a Distinguished Lecturer of the IEEE Solid-State Circuits Society. For his doctoral research, he received the 2005 Simon Stevin Gezel Award from the Dutch Technology Foundation. He is a co-recipient of 15 best paper awards from the JSSC, ISSCC, VLSI, ESSCIRC and Transducers, among others. At the 60th anniversary of ISSCC, he was recognized as a top-10 contributor. He is a member of the Royal Netherlands Academy of Arts and Sciences, an alumnus of its Young Academy, a member of the editorial board of the Proceedings of the IEEE, and a former elected member of the AdCom of the IEEE Solid-State Circuits Society.
Low Power Circuit Design Using Advanced CMOS Technology
Creators: Milin Zhang
Zhihua Wang
Jan Van der Spiegel
 and Franco Maloberti
Publisher: name: IEEE
Year: 2018

Tutorials in Circuits and Systems eBook
This book is a summary of lectures from the first Advanced CMOS Technology School (ACTS) summer 2017. The slides are selected from the handouts, while the text was edited according to the lecturers talk.

ACTS is a joint activity supported by the IEEE Circuit and System Society (CASS) and the IEEE Solid-State Circuits Society (SSCS). The goal of the school is to provide society members as well researchers and engineers from industry the opportunity to learn about new emerging areas from leading experts in the field. ACTS is an example of high-level continuous education for junior engineers, teachers in academe, and students. ACTS was the results of a successful collaboration between societies, the local chapter leaders, and industry leaders. This summer school was the brainchild of Dr. Zhihua Wang, with strong support from volunteers from both the IEE SCS and CASS. In addition, the local companies, Synopsys China and Beijing IC Park, provided financial support.

This first ACTS was held in the summer 2017 in Beijing. The lectures were given by aca-demic researchers and industry experts, who presented each 6-hour long lectures on topics covering process technology, EDA skill, and circuit and layout design skills. The school was hosted and organized by the CASS Beijing Chapter, SSCS Beijing Chapter, and SSCS Tsinghua Student Chapter. The co-chairs of the first ACTS were Dr. Milin Zhang, Dr. Hanjun Jiang and Dr. Liyuan Liu. The first ACTS was a great success as illustrated by the many participants from all over China as well as by the publicity it has been received in various media outlets, including Xinhua News, one of the most popular news channels in China.