cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The exact evaluation of the corner-to-corner resistance of an M x N resistor network: Asymptotic expansion
Creators: name: Essam, J. W.
name: Wu, F. Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the corner-to-corner resistance of an M x N resistor network with resistors r and s in the two spatial directions, and obtain an asymptotic expansion of its exact expression for large M and N. For M = N, r = s =1, our result is R_{NxN} = (4/pi) log N + 0.077318 + 0.266070/N^2 - 0.534779/N^4 + O(1/N^6).
description: 12 pages, re-arranged sections
Conformer-specific Chemistry Imaged in Real Space and Time
Creators: name: Champenois, E. G.
name: Sanchez, D. M.
name: Yang, J.
name: Nunes, J. P. F.
name: Attar, A.
name: Centurion, M.
name: Forbes, R.
name: Gühr, M.
name: Hegazy, K.
name: Ji, F.
name: Saha, S. K.
name: Liu, Y.
name: Lin, M. -F.
name: Luo, D.
name: Moore, B.
name: Shen, X.
name: Ware, M. R.
name: Wang, X. J.
name: Martínez, T. J.
name: Wolf, T. J. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Conformational isomers or conformers of molecules play a decisive role in chemistry and biology. However, experimental methods to investigate chemical reaction dynamics are typically not conformer-sensitive. Here, we report on a gas-phase megaelectronvolt ultrafast electron diffraction investigation of α-phellandrene undergoing an electrocyclic ring-opening reaction. We directly image the evolution of a specific set of α-phellandrene conformers into the product isomer predicted by the Woodward-Hoffmann rules in real space and time. Our experimental results are in quantitative agreement with nonadiabatic quantum molecular dynamics simulations, which provide unprecedented detail of how conformation influences time scale and quantum efficiency of photoinduced ring-opening reactions. Due to the prevalence of large numbers of conformers in organic chemistry, our findings impact our general understanding of reaction dynamics in chemistry and biology.
Signal Codes
Creators: name: Shalvi, Ofir
name: Sommer, Naftali
name: Feder, Meir
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Motivated by signal processing, we present a new class of channel codes, called signal codes, for continuous-alphabet channels. Signal codes are lattice codes whose encoding is done by convolving an integer information sequence with a fixed filter pattern. Decoding is based on the bidirectional sequential stack decoder, which can be implemented efficiently using the heap data structure. Error analysis and simulation results indicate that signal codes can achieve low error rate at approximately 1dB from channel capacity.
description: Submitted to IEEE Transactions on Information Theory
Recursive Schr\" odinger Equation Approach to Faster Converging Path Integrals
Creators: name: Balaz, Antun
name: Bogojevic, Aleksandar
name: Vidanovic, Ivana
name: Pelster, Axel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: By recursively solving the underlying Schr\" odinger equation, we set up an efficient systematic approach for deriving analytic expressions for discretized effective actions. With this we obtain discrete short-time propagators for both one and many particles in arbitrary dimension to orders which have not been accessible before. They can be used to substantially speed up numerical Monte Carlo calculations of path integrals, as well as for setting up a new analytical approximation scheme for energy spectra, density of states, and other statistical properties of quantum systems.
description: 8 pages, 2 figures, uses revtex4
Bodies that Splatter. Interpretationen emanzipatorischer Momente in Quentin Tarantinos „Death Proof“
Creators: name: Denk, Anna
Publisher: name: Medienimpulse
Year: 2012

description: Medienimpulse, Bd. 50 Nr. 2 (2012): 2/2012 - Biomacht, Biopolitik, Biomedien
inclusion 2.0
Creators: name: Swoboda, Wilfried
name: Mueller, Martin
Publisher: name: Medienimpulse
Year: 2013

description: Das Sonderpädagogische Zentrum Holzhausergasse, Wien, Österreich, ist ein Schulstandort für junge Menschen mit Behinderung. Die Schule hat einen Schwerpunkt in der Berufsvorbereitung und ist durch eine sehr gute Vernetzung Vorreiter bei der Vorbereitung auf den Arbeitsmarkt. Der Zweite Schwerpunkt umfasst die Schiene der „Kulturellen Bildung“ nach der „UNESCO – Road Map for Arts Education“. Über Kooperationen, der Teilnahme an Kunstprojekten und Wettbewerben wird zu neuen Lernmethoden und –strukturen geforscht. Das technische Gymnasium „Stredná priemyselná škola“ liegt in Myjava, in der westlichen Slowakei. Das Oberstufengymnasium ist spezialisiert auf Technik, Elektronik, Maschinenbau, Mechatronik und Logistik. Die Schule hat einen ITC-Schwerpunkt und ist in das „Microsoft IT Academy Programm“ sowie die „Cisco Network Academy“ eingebettet. Das Projekt verknüpfte zwei Aspekte. Einerseits galt es Aktivitäten zur „media literacy“ zu setzen andererseits sollten die Schwerpunkte Diversität, Interkulturalität und sprachliche Annäherung behandelt werden. Es wurde ein „virtueller Projektraum“ („virtual space“) installiert. Dieser Raum sollte einen „fake“, einen „virtuellen Schwindel“, ermöglichen und zugleich Spielraum des Zueinanderfindens sein. Der „virtual space“ bestand aus einer Skype–Verbindung der beiden Schulen, in den einerseits Gegenstände geteilt und andererseits das Kartenspiel UNO als „Fake“ gespielt wurde. Die Aktionen fanden zwischen November 2012 und Februar 2013 im zweiwöchentlichen Rhythmus statt. An fixierten Terminen trafen sich die beiden Gruppen via Skype in den so genannten „Sessions“ und kommunizierten miteinander [1] UNESCO-Weltkonferenz „Arts Education – Building Creative Capacities for the 21st Century“ 2006/Lissabon
description: Medienimpulse, Bd. 51 Nr. 2 (2013): 2/2013 - Freizeitpädagogik - Freiwillig, Selbstbestimmt, Selbstorganisiert?
Deep Context- and Relation-Aware Learning for Aspect-based Sentiment Analysis
Creators: name: Oh, Shinhyeok
name: Lee, Dongyub
name: Whang, Taesun
name: Park, IlNam
name: Seo, Gaeun
name: Kim, EungGyun
name: Kim, Harksoo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Existing works for aspect-based sentiment analysis (ABSA) have adopted a unified approach, which allows the interactive relations among subtasks. However, we observe that these methods tend to predict polarities based on the literal meaning of aspect and opinion terms and mainly consider relations implicitly among subtasks at the word level. In addition, identifying multiple aspect-opinion pairs with their polarities is much more challenging. Therefore, a comprehensive understanding of contextual information w.r.t. the aspect and opinion are further required in ABSA. In this paper, we propose Deep Contextualized Relation-Aware Network (DCRAN), which allows interactive relations among subtasks with deep contextual information based on two modules (i.e., Aspect and Opinion Propagation and Explicit Self-Supervised Strategies). Especially, we design novel self-supervised strategies for ABSA, which have strengths in dealing with multiple aspects. Experimental results show that DCRAN significantly outperforms previous state-of-the-art methods by large margins on three widely used benchmarks.
description: Accepted to ACL-IJCNLP 2021
Electronic Conductivity Measurements in Solid Electrolytes Using an Ion Blocking Microelectrode: Noise Rejection Based on a Median Filter
Creators: name: Gunes, Veyis
name: Botquelen, Jean-Yves
name: Bohnke, Odile
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: A method of electronic conductivity measurement is presented. It combines two well known methods of electrochemistry: cyclic voltammetry and chronoamperometry. This DC technique uses the Hebb/Wagner approach to block ionic conduction when steady state conditions are reached and allows electronic conduction of solid electrolytes to be determined. In order to get short diffusion times, a micro contact is used as an ion blocking electrode. However, as the electronic conduction in electrolytes is and should be very low, the current is also very low, typically some tens of nanoamps. Thus, the heating system inevitably generates noise problems that are solved using a median filter. Our system allows the determination of the conductivities without any preliminary smoothing or fitting of the curves. Some results with oxygen ion conductors are also give
description: 14 pages
Thin accretion disks around traversable wormholes
Creators: name: Rahaman, Farook
name: Manna, Tuhina
name: Shaikh, Rajibul
name: Aktar, Somi
name: Mondal, Monimala
name: Samanta, Bidisha
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we aim to investigate various physical properties and characteristics of radiation emerging from the surface of accretion disks, in a rotating traversable axially symmetric wormhole spacetime of the Teo class. We have studied the marginally stable orbits and accretion efficiency graphically, corresponding to different values of dimensionless spin parameter $J/M^2$ ranging from 0.2 to 1.5 and some values of the throat radius $r_0$, in comparison to the Kerr black hole with the same parameter values, and also tabulated the results. The energy flux radiated by the accretion disk $F(r)$, the temperature distribution $T(r)$ and the emission spectra $νL(ν)$ is plotted, corresponding to varying values of the dimensionless spin parameter $J/M^2$ and throat radius $r_0$. Also, the critical frequency at which the luminosity attains its maximum value, for various values of the angular momentum of the wormhole $J/M^2$ and $r_0$ is tabulated. Lastly, we have employed ray-tracing technique, to produce the intensity map of the image of an accretion disk, as observed by an asymptotic observer, under two conditions: firstly when the disk is on the same side as the observer and we have also compared those with the images of an accretion disk in case of Kerr black hole with same parameters. Secondly, the images have been provided when the disk and observer are on opposite sides of the throat. This study may help to detect and distinguish wormhole geometries from other compact objects.
description: 18 pages, 6 figures. Published in Nuclear Physics B
Holographic model of superfluidity
Creators: name: Herzog, C. P.
name: Kovtun, P. K.
name: Son, D. T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a holographic model of a relativistic quantum system with a global U(1) symmetry, at non-zero temperature and density. When the temperature falls below a critical value, we find a second-order superfluid phase transition with mean-field critical exponents. In the symmetry-broken phase, we determine the speed of second sound as a function of temperature. As the velocity of the superfluid component relative to the normal component increases, the superfluid transition goes through a tricritical point and becomes first-order.
description: 17 pages, 4 figures; v2 ref added; v3 small corrections, published in PRD
Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators
Creators: name: Biznárová, Janka
name: Hernández, J. C. Rivera
name: Forchheimer, Daniel
name: Bylander, Jonas
name: Haviland, David B.
name: Andersson, Gustav
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Two-level system (TLS) loss is typically limiting the coherence of superconducting quantum circuits. The loss induced by TLS defects is nonlinear, resulting in quality factors with a strong dependence on the circulating microwave power. We observe frequency mixing due to this nonlinearity by applying a two-tone drive to a coplanar waveguide resonator and measuring the intermodulation products using a multifrequency lock-in technique. This intermodulation spectroscopy method provides an efficient approach to characterizing TLS loss in superconducting circuits. Using harmonic balance reconstruction, we recover the nonlinear parameters of the device-TLS interaction, which are in good agreement with the standard tunnelling model for TLSs.
description: 10 pages, 11 figures
Future Developments in Charged Particle Therapy: Improving Beam Delivery for Efficiency and Efficacy
Creators: name: Yap, Jacinta
name: De Franco, Andrea
name: Sheehy, Suzie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The physical and clinical benefits of charged particle therapy (CPT) are well recognised and recent developments have led to the rapid emergence of facilities, resulting in wider adoption worldwide. Nonetheless, the availability of CPT and complete exploitation of dosimetric advantages are still limited by high facility costs and technological challenges. There are extensive ongoing efforts to improve upon these, which will lead to greater accessibility, superior delivery, and therefore better treatment outcomes. Several of these aspects can be addressed by developments to the beam delivery system (BDS) which determine the overall shaping and timing capabilities to provide high quality treatments. Modern delivery techniques are necessary but are limited by extended treatment times. The energy layer switching time (ELST) is a limiting constraint of the BDS and a determinant of the beam delivery time (BDT), along with the accelerator and other factors. This review evaluates the delivery process in detail, presenting the limitations and developments for the BDS and related accelerator technology, toward decreasing the BDT. As extended BDT impacts motion and has dosimetric implications for treatment, we discuss avenues to minimise the ELST and overview the clinical benefits and feasibility of a large energy acceptance BDS. These developments support the possibility of delivering advanced methodologies such as volumetric rescanning, FLASH and arc therapy and can further reduce costs given a faster delivery for a greater range of treatment indications. Further work to realise multi-ion, image guided and adaptive therapies is also discussed. In this review we examine how increased treatment efficiency and efficacy could be achieved with an improved BDS and how this could lead to faster and higher quality treatments for the future of CPT.
description: 43 pages, 13 figures. Preprint version
We gotta get out of this place. Rock, die Konservativen und die Postmoderne
Creators: name: Wintersteiger, Christina
Publisher: name: Medienimpulse
Year: 2013

description: Medienimpulse, Bd. 51 Nr. 2 (2013): 2/2013 - Freizeitpädagogik - Freiwillig, Selbstbestimmt, Selbstorganisiert?
Vor Google. Eine Mediengeschichte der Suchmaschine im analogen Zeitalter
Creators: name: Rogy, Raffaela
Publisher: name: Medienimpulse
Year: 2013

description: Medienimpulse, Bd. 51 Nr. 2 (2013): 2/2013 - Freizeitpädagogik - Freiwillig, Selbstbestimmt, Selbstorganisiert?
ADONIS high contrast infrared imaging of Sirius-B
Creators: name: Bonnet-Bidaud, Jean-Marc
name: Pantin, Eric
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Sirius is the brightest star in the sky and a strong source of diffuse light for modern telescopes so that the immediate surroundings of the star are still poorly known. We study the close surroundings of the star (2 to 25 arcsec) by means of adaptive optics and coronographic device in the near-infrared, using the ESO/ADONIS system. The resulting high contrast images in the JHKs bands have a resolution of ~ 0.2 arcsec and limiting apparent magnitude ranging from mK = 9.5 at 3 arcsec, from Sirius-A to mK = 13.1 at 10 arcsec. These are the first and deepest images of the Sirius system in this infrared range. From these observations, accurate infrared photometry of the Sirius-B white dwarf companion is obtained. The JH magnitudes of Sirius-B are found to agree with expectations for a DA white dwarf of temperature (T=25000K) and gravity (log(g) = 8.5), consistent with the characteristics determined from optical observations. However, a small, significant excess is measurable for the K band, similar to that detected for "dusty" isolated white dwarfs harbouring suspected planetary debris. The possible existence of such circumstellar material around Sirius-B has still to be confirmed by further observations. These deep images allow us to search for small but yet undetected companions to Sirius. Apart from Sirius-B, no other source is detected within the total 25 arcsec field. The minimum detectable mass is around 10 MJup inside the planetary limit, indicating that an extrasolar planet at a projected distance of ~ 25 AU from Sirius would have been detected (abridged abstract).
description: Comments: 6 pages, 5 figures. Accepted for publication in A&A
SLC k.o. cell lines
Creators: name: Gernot Wolf
name: Klaus Seuwen
name: Barbara Barbosa
name: Eirini Christodoulaki
name: Alvaro Ingles-Prieto
name: Ulrich Goldmann
name: Christoph Klimek
name: Svenja Onstein
name: Vitaly Sedlyarov
name: Tabea Wiedmer
name: Diana Santacruz
name: Coralie Viollet
name: Florence Massey
name: Veeranagouda Yaligara
Publisher: name: Zenodo
Year: 2021

description: Collection of >600 cell lines each carrying frameshift mutations in one SLC gene, quality-controlled and characterized with a multi-parameter approach
description: RESOLUTE has received funding from the Innovative Medicines Initiative 2 Joint Undertaking under grant agreement No 777372. This Joint Undertaking receives support from the European Union's Horizon 2020 research and innovation programme and EFPIA. This article reflects only the authors' views and neither IMI nor the European Union and EFPIA are responsible for any use that may be made of the information contained therein.
Light-cone M5 and multiple M2-branes
Creators: name: Bandos, Igor A.
name: Townsend, Paul K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the light-cone gauge fixed Lagrangian for the M5-brane; it has a residual `exotic' gauge invariance with the group of 5-volume preserving diffeomorphisms, SDiff(5), as gauge group. For an M5-brane of topology R2 x M3, for closed 3-manifold M3, we find an infinite tension limit that yields an SO(8)-invariant (1+2)-dimensional field theory with `exotic' SDiff(3) gauge invariance. We show that this field theory is the Carrollian limit of the Nambu bracket realization of the `BLG' model for multiple M2-branes.
description: 21 pages, revised to clarify some points, to include a discussion of SDiff gauge invariance, and to add two references
Normal form for lower dimensional elliptic tori in Hamiltonian systems
Creators: name: Caracciolo, Chiara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We give a proof of the convergence of an algorithm for the construction of lower dimensional elliptic tori in nearly integrable Hamiltonian systems. The existence of such invariant tori is proved by leading the Hamiltonian to a suitable normal form. In particular, we adapt the procedure described in a previous work by Giorgilli and co-workers, where the construction was made so as to be used in the context of the planetary problem. We extend the proof of the convergence to the cases in which the two sets of frequencies, describing the motion along the torus and the transverse oscillations, have the same order of magnitude.
description: accepted for publication in "Mathematics in Engineering"
Predicting Maximum Permitted Process Forces for Object Grasping and Manipulation Using a Deep Learning Regression Model
Creators: name: Wucherer, S.
name: McMurray, R.
name: Ng, K. Y.
name: Kerber, F.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: During the execution of handling processes in manufacturing, it is difficult to measure the process forces with state-of-the-art gripper systems since they usually lack integrated sensors. Thus, the exact state of the gripped object and the actuating process forces during manipulation and handling are unknown. This paper proposes a deep learning regression model to construct a continuous stability metric to predict the maximum process forces on the gripped objects using high-resolution optical tactile sensors. A pull experiment was developed to obtain a valid dataset for training. Continuously force-based labeled pairs of tactile images for varying grip positions of industrial gearbox parts were acquired to train a novel neural network inspired by encoder-decoder architectures. A ResNet-18 model was used for comparison. Both models can predict the maximum process force for each object with a precision of less than 1 N. During validation, the generalization potential of the proposed methodology with respect to previously unknown objects was demonstrated with an accuracy of 0.4-2.1 N and precision of 1.7-3.4 N, respectively.
description: 6 pages, 4 figures, 3 tables, to be submitted as a conference paper to IEEE CCTA2024
Visualizing Histories and Stories
Creators: name: Boge, Chris
Publisher: name: Medienimpulse
Year: 2013

description: Der Beitrag gibt einen Überblick über einige der wichtigsten grafischen Romane der 1980er- und 1990er-Jahre, und diskutiert anschließend zwei bedeutende Werke dieser Zeit: Art Spiegelmans Maus und Alan Moores Watchmen . Revisionäre grafische Romane sind sowohl visionär als auch revisionistisch und laden LehrerInnen und SchülerInnen ein, über die Prämissen der historiographischen Arbeit nachzudenken: in Prozessen, die ebenso auf Vorstellungskraft wie Mutmaßungen und Schlussfolgerungen basieren, werden Daten gesammelt und anschließend in einer kohärenten Erzählung als ‚Fakten‘ präsentiert. Indem sie Bild- und Sprachelemente kombinieren und oft (deren unterschiedlichen ontologischen Status) kontrastieren, fordern uns grafische Romane heraus, unsere herkömmlichen Annahmen über Linearität, Fortschritt, Tradition und Kanonizität zu überdenken und über (die kognitiven Voraussetzungen für) menschliches Raum- und Zeitempfinden ebenso nachzudenken wie über unsere Veranlagung, kausale Verknüpfungen zu schaffen. Letztere hilft, Kontingenz in kontrollierbare Erzählmuster zu übersetzen, die die Welt für uns erklärbar, sinnhaft und navigierbar machen. Der Beitrag gibt einen Überblick über einige der wichtigsten grafischen Romane der 1980er und 90er Jahre, und diskutiert anschließend zwei bedeutende Werke dieser Zeit, Art Spiegelmans Maus und Alan Moores Watchmen. Revisionäre grafische Romane sind sowohl visionär als auch revisionistisch und laden Lehrer und Schüler ein, über die Prämissen der historiographischen Arbeit nachzudenken: in Prozessen, die ebenso auf Vorstellungskraft wie Mutmaßungen und Schlussfolgerungen basieren, werden Daten gesammelt und anschließend in einer kohärenten Erzählung als ‚Fakten‘ präsentiert. Indem sie Bild- und Sprachelemente kombinieren und oft (deren unterschiedlichen ontologischen Status) kontrastieren, fordern uns grafische Romane heraus, unsere herkömmlichen Annahmen über Linearität, Fortschritt, Tradition und Kanonizität zu überdenken und über (die kognitiven Voraussetzungen für) menschliches Raum- und Zeitempfinden ebenso nachzudenken wie über unsere Veranlagung, kausale Verknüpfungen zu schaffen. Letztere hilft, Kontingenz in kontrollierbare Erzählmuster zu übersetzen, die die Welt für uns erklärbar, sinnhaft und navigierbar machen.
description: Medienimpulse, Bd. 51 Nr. 3 (2013): 3/2013 - Visuelle Historiografien/Comics zwischen Reflexion und Konstruktion von Geschichte(n)
Unparticle Searches Through Low Energy Parity Violating Asymmetry
Creators: name: Ozansoy, K. O.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we study the effects of the unparticles on the parity-violating asymmetry for the low energy electron-electron scattering, $e^-e^-\to e^-e^-$. Using the data from the E158 experiment at SLAC we extract the limits on the unparticle coupling $λ_{AV}$, and on the the energy scale $Λ$ at 95% C.L. for various values of the scaling dimension $d$.
Iconoclash: Bruno Latours Thesen zu ikonoklastischen Haltungen und sein Ansatz zur Überwindung fanatischer Bilderstürmerei
Creators: name: Schreiber, Renate
Publisher: name: Medienimpulse
Year: 2013

description: Medienimpulse, Bd. 51 Nr. 3 (2013): 3/2013 - Visuelle Historiografien/Comics zwischen Reflexion und Konstruktion von Geschichte(n)
COVID-19 Outbreaks in Settings With Precarious Housing Conditions in Germany: Challenges and Lessons Learned
Creators: name: Zimmermann, Ruth
name: Sarma, Navina
name: Thieme-Thörel, Doris
name: Alpers, Katharina
name: Artelt, Tanja
name: Azouagh, Karima
name: Bremer, Viviane
name: Broistedt, Petra
name: Eckmanns, Tim
name: Feltgen, Nicolas
name: Huska, Matthew
name: Kröger, Stefan
name: Puls, Angelika
name: Scheithauer, Simone
name: Mayr, Eckart
name: Rexroth, Ute
Publisher: name: Robert Koch-Institut
Year: 2021
Subjects: subject: housing
subject: overcrowding
subject: poverty
subject: marginalization
subject: outbreak
subject: SARS CoV-2
subject: COVID-19
subject: 610 Medizin und Gesundheit

description: Two COVID-19 outbreaks occurred in residential buildings with overcrowded housing conditions in the city of Göttingen in Germany during May and June 2020, when COVID-19 infection incidences were low across the rest of the country, with a national incidence of 2.6/100,000 population. The outbreaks increased the local incidence in the city of Göttingen to 123.5/100,000 in June 2020. Many of the affected residents were living in precarious conditions and experienced language barriers. The outbreaks were characterized by high case numbers and attack rates among the residents, many asymptomatic cases, a comparatively young population, and substantial outbreak control measures implemented by local authorities. We analyzed national and local surveillance data, calculated age-, and gender-specific attack rates and performed whole genome sequencing analysis to describe the outbreak and characteristics of the infected population. The authorities’ infection control measures included voluntary and compulsory testing of all residents and mass quarantine. Public health measures, such as the general closure of schools and a public space as well as the prohibition of team sports at local level, were also implemented in the district to limit the outbreaks locally. The outbreaks were under control by the end of June 2020.We describe themeasures to contain the outbreaks, the challenges experienced and lessons learned.We discuss how public health measures can be planned and implemented through consideration of the needs and vulnerabilities of affected populations. In order to avoid coercive measures, barrier-free communication, with language translation when needed, and consideration of socio-economic circumstances of affected populations are crucial for controlling infectious disease transmission in an outbreak effectively and in a timely way.
Rezension: Organisierte Kommunikation ohne Gesicht – Die Bewältigung zeitlich und sachlich entkoppelter Kommunikation am Beispiel einer MMORPG-Gilde
Creators: name: Stingeder, Karl H.
Publisher: name: Medienimpulse
Year: 2013

description: Medienimpulse, Bd. 51 Nr. 3 (2013): 3/2013 - Visuelle Historiografien/Comics zwischen Reflexion und Konstruktion von Geschichte(n)
Antiferromagnetic Chern insulator with large charge gap in heavy transition-metal compounds
Creators: name: Hafez-Torbati, Mohsen
name: Uhrig, Götz S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Despite the discovery of multiple intrinsic magnetic topological insulators in recent years the observation of Chern insulators is still restricted to very low temperatures due to the negligible charge gaps. Here, we uncover the potential of heavy transition-metal compounds for realizing a collinear antiferromagnetic Chern insulator (AFCI) with a charge gap as large as 300 meV. Our analysis relies on the Kane-Mele-Kondo model with a ferromagnetic Hund coupling $J_{\rm H}$ between the spins of itinerant electrons and the localized spins of size $S$. We show that a spin-orbit coupling $λ_{\rm SO} \gtrsim 0.03t$, where $t$ is the nearest-neighbor hopping element, is already large enough to stabilize an AFCI provided the alternating sublattice potential $δ$ is in the range $δ\approx SJ_{\rm H}$. We establish a remarkable increase in the charge gap upon increasing $λ_{\rm SO}$ in the AFCI phase. Using our results we explain the collinear AFCI recently found in monolayers of CrO and MoO with charge gaps of 1 and $50$ meV, respectively. In addition, we propose bilayers of heavy transition-metal oxides of perovskite structure as candidates to realize a room-temperature AFCI if grown along the $[111]$ direction and subjected to a perpendicular electric field.
description: 12 pages, 6 figures
The XMM-Newton survey of the ELAIS-S1 field II: optical identifications and multiwavelength catalogue of X-ray sources
Creators: name: Feruglio, C.
name: Fiore, F.
name: La Franca, F.
name: Sacchi, N.
name: Puccetti, S.
name: Comastri, A.
name: Berta, S.
name: Brusa, M.
name: Franceschini, A.
name: Gruppioni, C.
name: Mathur, S.
name: Matute, I.
name: Mignoli, M.
name: Pozzi, F.
name: Vignali, C.
name: Zamorani, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present optical identifications and a multi-band catalogue of a sample of 478 X-ray sources in the XMM and Chandra surveys of the central 0.6 deg^2 of the ELAIS-S1 field. The optical/infrared counterpart of each X-ray source was identified using R and IRAC 3.6 um bands. This method was complemented by the precise positions obtained through Chandra observations. Approximately 94% of the counterparts are detected in the R band, while the remaining are blank fields in the optical down to R~24.5, but have a near-infrared counterpart detected by IRAC within 6 arcsec from the XMM centroid. The multi-band catalogue contains photometry in ten photometric bands (B to the MIPS 24 um). We determined redshift and classification for 237 sources (~50% of the sample) brighter than R=24. We classified 47% of the sources with spectroscopic redshift as broad-line active galactic nuclei (BL AGNs) with z=0.1-3.5, while sources without broad-lines are about 46% of the spectroscopic sample and are found up to z=2.6. We identified 11 type 2 QSOs among the sources with X/O>8, with z=0.9-2.6, high 2-10 keV luminosity (log(L2-10keV)>=43.8 erg/s) and hard X-ray colors suggesting large absorbing columns at the rest frame (logN_H up to 23.6 cm^-2). BL AGNs show on average blue optical-to-near-infrared colors, softer X-ray colors and X-ray-to-optical colors typical of optically selected AGNs. Conversely, narrow-line sources show redder optical colors, harder X-ray flux ratio and span a wider range of X-ray-to-optical colors. On average the SEDs of high-luminosity BL AGNs resemble the power-law typical of unobscured AGNs. The SEDs of NOT BL AGNs are dominated by the galaxy emission in the optical/near-infrared, and show a rise in the mid-infrared which suggests the presence of an obscured active nucleus.
description: 15 pages, A&A accepted, affiliations corrected
CHILI: Chemically-Informed Large-scale Inorganic Nanomaterials Dataset for Advancing Graph Machine Learning
Creators: name: Friis-Jensen, Ulrik
name: Johansen, Frederik L.
name: Anker, Andy S.
name: Dam, Erik B.
name: Jensen, Kirsten M. Ø.
name: Selvan, Raghavendra
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Advances in graph machine learning (ML) have been driven by applications in chemistry as graphs have remained the most expressive representations of molecules. While early graph ML methods focused primarily on small organic molecules, recently, the scope of graph ML has expanded to include inorganic materials. Modelling the periodicity and symmetry of inorganic crystalline materials poses unique challenges, which existing graph ML methods are unable to address. Moving to inorganic nanomaterials increases complexity as the scale of number of nodes within each graph can be broad ($10$ to $10^5$). The bulk of existing graph ML focuses on characterising molecules and materials by predicting target properties with graphs as input. However, the most exciting applications of graph ML will be in their generative capabilities, which is currently not at par with other domains such as images or text.
 We invite the graph ML community to address these open challenges by presenting two new chemically-informed large-scale inorganic (CHILI) nanomaterials datasets: A medium-scale dataset (with overall >6M nodes, >49M edges) of mono-metallic oxide nanomaterials generated from 12 selected crystal types (CHILI-3K) and a large-scale dataset (with overall >183M nodes, >1.2B edges) of nanomaterials generated from experimentally determined crystal structures (CHILI-100K). We define 11 property prediction tasks and 6 structure prediction tasks, which are of special interest for nanomaterial research. We benchmark the performance of a wide array of baseline methods and use these benchmarking results to highlight areas which need future work. To the best of our knowledge, CHILI-3K and CHILI-100K are the first open-source nanomaterial datasets of this scale -- both on the individual graph level and of the dataset as a whole -- and the only nanomaterials datasets with high structural and elemental diversity.
description: 16 pages, 15 figures, 8 tables. Dataset is available at https://github.com/UlrikFriisJensen/CHILI
QKD based on symmetric entangled Bernstein-Vazirani
Creators: name: Ampatzis, Michael
name: Andronikos, Theodore
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper introduces a novel entanglement-based QKD protocol, that makes use of a modified symmetric version of the Bernstein-Vazirani algorithm, in order to achieve a secure and efficient key distribution. Two variants of the protocol, one fully symmetric and one semi-symmetric, are presented. In both cases, the spatially separated Alice and Bob share multiple EPR pairs, one qubit of the pair each. The fully symmetric version allows both parties to input a secret key from the irrespective location and, finally, acquire in the end a totally new and original key, an idea which was inspired by the Diffie-Hellman key exchange protocol. In the semi-symmetric version, Alice sends her chosen secret key to Bob (or vice versa). Furthermore, their performance against an eavesdropper's attack is analyzed. Finally, in order to illustrate the operation of the protocols in practice, two small scale but detailed examples are given.
description: 16 pages, 8 figures
Triangle mechanism in the decay process $J/ψ\to K^- K^+ a_1(1260)$
Creators: name: Luo, Xuan
name: He, Dazhuang
name: Xie, Yiling
name: Sun, Hao
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The role of triangle mechanism in the decay process $J/ψ\to K^- K^+ a_1(1260)$ is probed. In this mechanism, a close-up resonance with mass $1823$ MeV and width $122$ MeV decays into $K^* ϕ, K^* \to K π$ and then $K^* \bar{K}$ fuses into the $a_1(1260)$ resonance. We find that this mechanism leads to a triangle singularity around $M_{\rm inv}(K^- a_1(1260))\approx 1920$ MeV, where the axial-vector meson $a_1(1260)$ is considered as a dynamically generated resonance. With the help of the triangle mechanism we find sizable branching ratios $\text{Br}(J/ψ\to K^- K^+ a_1(1260),a_1 \to πρ)=1.210 \times 10^{-5}$ and $\text{Br}(J/ψ\to K^- K^+ a_1(1260))=3.501 \times 10^{-5}$. Such a effect from triangle mechanism of the decay process could be investigated by such as BESIII, LHCb and Belle-II experiments. This potential investigation can help us obtain the information of the axial-vector meson $a_1(1260)$.
description: 5figures, submit to prd
AYIQTOVONDOSHLAR OILASINING DORIVOR VAKILLARI VA ULARNING TIBBIYOT VA SANOATDAGI AHAMIYATI
Creators: name: No'monjonov, Fazliddin
Publisher: name: Zenodo
Year: 2025

description: Bu tezisda Ayiqtovondoshlar oilasini vakillarining tuzilishi, ko’payishi, sistematikasi va tibbiyotda va sanoatdagi ahamiyati haqida batafsil ma’lumotlar berilgan.
The effect of Ni doping on the electronic structure and superconductivity in the noncentrosymmetric ThCoC2
Creators: name: Kuderowicz, Gabriel
name: Wiendlocha, Bartlomiej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: ThCoC$_2$ is a non-BCS, noncentrosymmetric superconductor with $T_c \simeq 2.5$~K, in which pairing mechanism was suggested to be either spin fluctuations or the electron-phonon coupling. Earlier experimental work revealed that $T_c$ can be greatly enhanced upon Ni doping in ThCo$_{1-x}$Ni$_x$C$_2$, up to 12~K for $x = 0.4$. In this work, using the Korringa-Kohn-Rostoker method with the coherent potential approximation (KKR-CPA), the evolution of the electronic structure upon Ni doping was studied and the increase of the density of states at the Fermi level was found. The electron-phonon coupling constant $λ$ was calculated using the rigid muffin tin approximation (RMTA) and the increase in $λ(x)$ was found. This indirectly confirms the electron-phonon coupling scenario as the trend in $λ(x)$ is in qualitative agreement with the experiment when the electron-phonon pairing is assumed.
description: 5 pages, 4 figures, accepted in JMMM
Onlinespieler abseits des Mainstreams
Creators: name: Baumgartlinger, Harald
Publisher: name: Medienimpulse
Year: 2013

description: MMO(RP)Gs „Massively Multiplayer Online (Role-Playing) Games“ nehmen einen Sonderstatus unter den Onlinespielen ein, welcher durch den wachsenden wirtschaftlichen Erfolg, insbesondere durch den „breakthrough hit“ (Duchenaut et al. 2006: 407) World of Warcraft (WoW), auch an Bedeutung für die Medien- und Kommunikationswissenschaft gewinnt (vgl. Inderst 2009: 15; vgl. Seifert/Jöckel 2008: 297). Der Primus des Genres, WoW, repräsentiert gemeinsam mit einigen nahezu identen Titeln insgesamt 85 Prozent der gespielten MMOGs (vgl. Williams et al. 2008: 999). Daher befasst sich auch die Mehrheit der vorliegenden Studien mit eben diesen Spielen. Neue Formen von MMO(G)s können jedoch zu ebenso neuartigen Spielerfahrungen führen und damit unterschiedliche Nutzungsmotive befriedigen (vgl. Seifert/Jöckel 2008: 309) und folglich zu einem gänzlich anderen Spielerleben führen. Während im Mainstream die kooperativen Spielerbeziehungen überwiegen, dominiert in Darkfall Online der soziale Wettbewerb. Der von Williams et al. 2008 verwendete Fragebogen diente als Rohling für die Kreation eines für die speziellen Anforderungen adaptierten Erhebungstools zur Erforschung der Spielertypologie und der Motive der Darkfall-Online -SpielerInnen. Die in der Onlinebefragung (N = 506) gesammelten Daten belegen, dass sich sowohl die Spielerdemographie, als auch die Motive der Spieler von den Mainstream MMOs unterscheiden. Zudem konnten realweltliche Eigenschaften der Spieler als signifikante Einflussfaktoren für die Spielzuwendung identifiziert werden.
description: Medienimpulse, Bd. 50 Nr. 4 (2012): 4/2012 - Soziale und Mediale Räume
Nummern für Räume: Zwischen Verbrechensbekämpfung, Aneignung und Klassenkampf
Creators: name: Tantner, Anton
Publisher: name: Medienimpulse
Year: 2013

description: Medienimpulse, Bd. 50 Nr. 4 (2012): 4/2012 - Soziale und Mediale Räume
Emergent Phenomena with Broken Parity-Time Symmetry: Odd-order vs. Even-order Effects
Creators: name: Cheong, Sang-Wook
name: Huang, Fei-Ting
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Symmetry often governs the laws of nature, and breaking symmetry accompanies a new order parameter and emergent observable phenomena. Herein, we focus on broken Parity (P)-Time (T) symmetry, which lifts the Kramers' degeneracy, and thus, guarantees non-trivial spin textures in excitation spectra. To attain non-zero measurables, we use the concept of symmetry operational similarity (SOS), which consider the symmetry relationship between a specimen and an experimental setup, rather than the symmetry of specific coupling terms. Even without specific coupling terms, this SOS approach can tell if the relevant phenomenon is a zero, non-zero odd-order or non-zero even-order effect. We discuss systematically numerous steady-state physical phenomena, in which breaking P-T symmetry is a necessary condition. These phenomena include Odd-order or Even-order Anomalous Hall Effect, Optical activities, Directional nonreciprocity in transverse magnetic field, Diagonal or Off-diagonal current-induced magnetization (current can be associated with electrons, phonons, or light), Diagonal or Off-diagonal piezomagnetism and piezoelectricity. Some of these phenomena turn out to be conjugate to each other through P to T. Our findings unveil numerous new non-traditional candidate materials for various exotic physical phenomena, many of which have never been realized in the standard coupling term/tensorial approaches, and are a transformative and unconventional avenue for symmetry-guided materials designs and discoveries.
description: 29 pages, 3 figures, 1 Table
Der Raum des E-Learning-Unterrichts
Creators: name: Dopplinger, Ursula
Publisher: name: Medienimpulse
Year: 2013

description: Digitale Medien bestimmen den Schulalltag. Meistens finden sich Computer aber in den Ecken der Klassenzimmer oder in unpersönlichen Computerräumen, die Face-to-face-Kommunikation erschweren. Dieser Artikel widmet sich daher den (Unterrichts-)Räumlichkeiten, fragt nach ihrer Wirkung auf Lehrende und Lernende und diskutiert wie die daraus folgenden Erkenntnisse im E-Learning -Unterricht umgesetzt werden könnten. Dabei muss die Frage im Vordergrund stehen, unter welchen räumlichen Bedingungen Kinder sich wohl fühlen und wie sie in einer altersgemäßen Umgebung aufwachsen und im kognitiven Bereich optimal gefördert werden können. Sicher ist, dass in all diesen Bereichen Handlungsbedarf besteht.
description: Medienimpulse, Bd. 50 Nr. 4 (2012): 4/2012 - Soziale und Mediale Räume
Universal theory of nonlinear Luttinger liquids
Creators: name: Imambekov, Adilet
name: Glazman, Leonid I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: One-dimensional quantum fluids are conventionally described by using an effective hydrodynamic approach known as Luttinger liquid theory. As the principal simplification, a generic spectrum of the constituent particles is replaced by a linear one, which leads to a linear hydrodynamic theory. We show that to describe the measurable dynamic response functions one needs to take into account the nonlinearity of the generic spectrum and thus of the resulting quantum hydrodynamic theory. This nonlinearity leads, for example, to a qualitative change in the behavior of the spectral function. The universal theory developed in this article is applicable to a wide class of one-dimensional fermionic, bosonic, and spin systems.
description: final published version with supporting online material
Cyber-Mobbing als verletzender Sprechakt im Sinne Judith Butlers
Creators: name: Mildner (Sontag), Katharina
Publisher: name: Medienimpulse
Year: 2013

description: Dieser Beitrag widmet sich der Frage, inwiefern Cyber-Mobbing unter Bezugnahme auf Judith Butlers sprach- bzw. diskurstheoretisches Konzept als verletzender Sprechakt verstanden werden kann. Zu diesem Zweck werden in einem ersten Schritt die Besonderheiten von Cyber-Mobbing aufgezeigt und im Anschluss daran ein für diesen Text geeigneter Cyber-Mobbing-Begriff formuliert. Daraufhin erfolgt eine interpretative Auseinandersetzung mit der Butlerschen Konzeption verletzender Sprechakte, bevor anschließend anhand wesentlicher Schnittstellen herausgearbeitet wird, inwiefern Cyber-Mobbing als ein solcher verletzender sprachlicher Akt begriffen werden kann. Resümierend werden die zentralen Ergebnisse der Ausarbeitung zusammengefasst und es wird danach gefragt, welche Konsequenzen bzw. Folgen sich hieraus für ein mögliches verändertes Verständnis von Cyber-Mobbing ergeben.
description: Medienimpulse, Bd. 50 Nr. 4 (2012): 4/2012 - Soziale und Mediale Räume
Noncommutative ball maps
Creators: name: Helton, J. William
name: Klep, Igor
name: McCullough, Scott
name: Slinglend, Nick
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A56, 46L07 (Primary) 32H99, 32A99, 46L89 (Secondary)

description: In this paper, we analyze problems involving matrix variables for which we use a noncommutative algebra setting. To be more specific, we use a class of functions (called NC analytic functions) defined by power series in noncommuting variables and evaluate these functions on sets of matrices of all dimensions; we call such situations dimension-free. These types of functions have recently been used in the study of dimension-free linear system engineering problems. In this paper we characterize NC analytic maps that send dimension-free matrix balls to dimension-free matrix balls and carry the boundary to the boundary; such maps we call "NC ball maps". We find that up to normalization, an NC ball map is the direct sum of the identity map with an NC analytic map of the ball into the ball. That is, "NC ball maps" are very simple, in contrast to the classical result of D'Angelo on such analytic maps over C. Another mathematically natural class of maps carries a variant of the noncommutative distinguished boundary to the boundary, but on these our results are limited. We shall be interested in several types of noncommutative balls, conventional ones, but also balls defined by constraints called Linear Matrix Inequalities (LMI). What we do here is a small piece of the bigger puzzle of understanding how LMIs behave with respect to noncommutative change of variables.
description: 46 pages