cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Survey on Privacy for B5G/6G: New Privacy Challenges, and Research Directions
Creators: name: Sandeepa, Chamara
name: Siniarski, Bartlomiej
name: Kourtellis, Nicolas
name: Wang, Shen
name: Liyanage, Madhusanka
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Massive developments in mobile wireless telecommunication networks have been made during the last few decades. At present, mobile users are getting familiar with the latest 5G networks, and the discussion for the next generation of Beyond 5G (B5G)/6G networks has already been initiated. It is expected that B5G/6G will push the existing network capabilities to the next level, with higher speeds, enhanced reliability and seamless connectivity. To make these expectations a reality, research is progressing on new technologies, architectures, and intelligence-based decision-making processes related to B5G/6G. Privacy considerations are a crucial aspect that requires further attention in such developments, as billions of people and devices will be transmitting data through the upcoming network. However, the main recognition remains biased towards the network security. A discussion focused on privacy of B5G/6G is lacking at the moment. To address the gap, this paper provides a comprehensive survey on privacy-related aspects of B5G/6G networks. First, it discusses a taxonomy of different privacy perspectives. Based on the taxonomy, the paper then conceptualizes a set of challenges that appear as barriers to reach privacy preservation. Next, this work provides a set of solutions applicable to the proposed architecture of B5G/6G networks to mitigate the challenges. It also provides an overview of standardization initiatives for privacy preservation. Finally, the paper concludes with a roadmap of future directions, which will be an arena for new research towards privacy-enhanced B5G/6G networks. This work provides a basis for privacy aspects that will significantly impact peoples' daily lives when using these future networks.
description: Survey paper, 49 Pages, 15 figures
Annemarie und Wolf-Dieter Dube, E. L. Kirchner, Das graphische Werk
Creators: name: Wentzel, Hans
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Annemarie und Wolf-Dieter Dube, E. L. Kirchner, Das graphische Werk. 2 Bände. München 1967. Prestel-Verlag; Band I: 168 S., Band II: 293 Tafeln. DM 240, - .
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 21 Nr. 8 (1968): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Joint Learning of Salient Object Detection, Depth Estimation and Contour Extraction
Creators: name: Zhao, Xiaoqi
name: Pang, Youwei
name: Zhang, Lihe
name: Lu, Huchuan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Benefiting from color independence, illumination invariance and location discrimination attributed by the depth map, it can provide important supplemental information for extracting salient objects in complex environments. However, high-quality depth sensors are expensive and can not be widely applied. While general depth sensors produce the noisy and sparse depth information, which brings the depth-based networks with irreversible interference. In this paper, we propose a novel multi-task and multi-modal filtered transformer (MMFT) network for RGB-D salient object detection (SOD). Specifically, we unify three complementary tasks: depth estimation, salient object detection and contour estimation. The multi-task mechanism promotes the model to learn the task-aware features from the auxiliary tasks. In this way, the depth information can be completed and purified. Moreover, we introduce a multi-modal filtered transformer (MFT) module, which equips with three modality-specific filters to generate the transformer-enhanced feature for each modality. The proposed model works in a depth-free style during the testing phase. Experiments show that it not only significantly surpasses the depth-based RGB-D SOD methods on multiple datasets, but also precisely predicts a high-quality depth map and salient contour at the same time. And, the resulted depth map can help existing RGB-D SOD methods obtain significant performance gain. The source code will be publicly available at https://github.com/Xiaoqi-Zhao-DLUT/MMFT.
description: Accepted by IEEE TIP
Ideowe uwarunkowania translokacji górnośląskich kościołów drewnianych w Prusach w początkach XX wieku
Creators: name: Gorzelik, Jerzy
Publisher: name: Quart
Year: 2020

description: Includes a summary in English
description: Quart, Bd. 55 Nr. 1 (2020): Quart. The Quarterly of the Institute of Art History at the University of Wrocław
A Twistorial Description of the IKKT-Matrix Model
Creators: name: Steinacker, Harold
name: Tran, Tung
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the fuzzy 4-sphere $S_N^4$ as a background in the IKKT matrix model and explore the relation between $S_N^4$ and fuzzy twistor space in the semi-classical limit. A novel description for the IKKT-matrix model in terms of spinorial indices is given, which is reminiscent of $\mathcal{N}=4$ super-symmetric Yang-Mills (SYM) in $4d$. On fuzzy twistor space, the interactions of the IKKT model are of gravitational type. The higher-spin (HS) gauge theory emerging in this limit from the IKKT model, denoted as HS-IKKT, on fuzzy twistor space is shown to be a higher-spin extension of $\mathcal{N}=4$ SYM, with vertices that have more than two derivatives. We obtain its (Euclidean) spacetime action using the Penrose transform. Although this is a gravitational theory, it shares many features with the higher-spin extensions of Yang-Mills in $4d$ flat space obtained in arXiv:2105.12782, arXiv:2107.04500. The tree-level amplitudes of the HS-IKKT are studied in the semi-classical flat limit. The self-dual sector of the IKKT model is obtained by dropping some parts of the cubic- and the quartic interactions, which is shown to reduce to a BF-type action on commutative deformed projective twistor space.
description: 54 pages, references added, published version
Three-dimensional radiative transfer modeling of AGN dusty tori as a clumpy two-phase medium
Creators: name: Stalevski, Marko
name: Fritz, Jacopo
name: Baes, Maarten
name: Nakos, Theodoros
name: Popovic, Luka C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the emission of active galactic nuclei (AGN) dusty tori in the infrared domain. Following theoretical predictions coming from hydrodynamical simulations, we model the dusty torus as a 3D two-phase medium with high-density clumps and low-density medium filling the space between the clumps. Spectral energy distributions (SED) and images of the torus at different wavelengths are obtained using 3D Monte Carlo radiative transfer code SKIRT. Our approach of generating clumpy structure allows us to model tori with single clumps, complex structures of merged clumps or interconnected sponge-like structure. A corresponding set of clumps-only models and models with smooth dust distribution is calculated for comparison. We found that dust distribution, optical depth, clump size and their actual arrangement in the innermost region, all have an impact on the shape of near- and mid-infrared SED. The 10 micron silicate feature can be suppressed for some parameters, but models with smooth dust distribution are also able to produce a wide range of the silicate feature strength. Finally, we find that having the dust distributed in a two-phase medium, might offer a natural solution to the lack of emission in the near-infrared, compared to observed data, which affects clumpy models currently available in the literature.
description: 18 pages, 15 figures, 1 table. Accepted for publication in MNRAS. Model SEDs available for download at https://sites.google.com/site/skirtorus/
Structural and Electronic Properties of Graphene and Silicene: An FP-(L)APW+lo Study
Creators: name: Behera, Harihar
name: Mukhopadhyay, Gautam
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report here the structural and electronic properties of graphene and silicene (silicon analogue of graphene) investigated using first-principles calculations of their ground state energies employing full-potential (linearized) augmented plane wave plus local orbital (FP-(L)APW+lo) method. On structure optimization, we found that the graphene-like honeycomb structure of Si is buckled (buckling parameter $Δ= 0.44$ Åin constrast with graphene whose structure is planar ($Δ= 0.0$ Å). In spite of the buckled-structure, silicene has an electronic structure similar to that of graphene. The results are in agreement with previous reports based on other methods. We have also calculated the lower bounds of the lattice constant $"a"$ of these 2D systems, within the present method of study which are our new results.
description: Presented in the International Conference on Physics of Emerging Functional Materials (PEFM-2010), 22-24 Sept. 2010, Mumbai, India; Eds. Dinesh K. Aswal and Anil K. Debnath, AIP Conf. Proc. 1313 (2010) 152-155. 4 figures, typographic errors in published version rectified
Generalized quasi-topological gravities: the whole shebang
Creators: name: Bueno, Pablo
name: Cano, Pablo A.
name: Hennigar, Robie A.
name: Lu, Mengqi
name: Moreno, Javier
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Generalized quasi-topological gravities (GQTGs) are higher-curvature extensions of Einstein gravity in $D$-dimensions. Their defining properties include possessing second-order linearized equations of motion around maximally symmetric backgrounds as well as non-hairy generalizations of Schwarzschild's black hole characterized by a single function, $f(r)\equiv - g_{tt}=g_{rr}^{-1}$, which satisfies a second-order differential equation. In arXiv:1909.07983 GQTGs were shown to exist at all orders in curvature and for general $D$. In this paper we prove that, in fact, $n-1$ inequivalent classes of order-$n$ GQTGs exist for $D\geq 5$. Amongst these, we show that one -- and only one -- type of densities is of the Quasi-topological kind, namely, such that the equation for $f(r)$ is algebraic. Our arguments do not work for $D=4$, in which case there seems to be a single unique GQT density at each order which is not of the Quasi-topological kind. We compute the thermodynamic charges of the most general $D$-dimensional order-$n$ GQTG, verify that they satisfy the first law and provide evidence that they can be entirely written in terms of the embedding function which determines the maximally symmetric vacua of the theory.
description: 32 pages
The APEX-CHAMP+ view of the Orion Molecular Cloud 1 core - Constraining the excitation with submillimeter CO multi-line observations
Creators: name: Peng, T. -C.
name: Wyrowski, F.
name: Zapata, L. A.
name: Güsten, R.
name: Menten, K. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A high density portion of the Orion Molecular Cloud 1 (OMC-1) contains the prominent, warm Kleinmann-Low (KL) nebula that is internally powered by an energetic event plus a farther region in which intermediate to high mass stars are forming. Its outside is affected by ultraviolet radiation from the neighboring Orion Nebula Cluster and forms the archetypical photon-dominated region (PDR) with the prominent bar feature. Its nearness makes the OMC-1 core region a touchstone for research on the dense molecular interstellar medium and PDRs. Using the Atacama Pathfinder Experiment telescope (APEX), we have imaged the line emission from the multiple transitions of several carbon monoxide (CO) isotopologues over the OMC-1 core region. Our observations employed the 2x7 pixel submillimeter CHAMP+ array to produce maps (~ 300 arcsec x 350 arcsec) of 12CO, 13CO, and C18O from mid-J transitions (J=6-5 to 8-7). We also obtained the 13CO and C18O J=3-2 images toward this region. The 12CO line emission shows a well-defined structure which is shaped and excited by a variety of phenomena, including the energetic photons from hot, massive stars in the nearby Orion Nebula's central Trapezium cluster, active high- and intermediate-mass star formation, and a past energetic event that excites the KL nebula. Radiative transfer modeling of the various isotopologic CO lines implies typical H2 densities in the OMC-1 core region of ~10^4-10^6 cm^-3 and generally elevated temperatures (~ 50-250 K). We estimate a warm gas mass in the OMC-1 core region of 86-285 solar masses.
description: 11 pages, 9 figures, accepted by A&A
Die mittelalterlichen Steigbügel aus dem Berliner Bestand der Prussia-Sammlung (ehemals Königsberg/Ostpreußen) – Studien zu Typologie, Chronologie und Kulturgeschichte
Creators: name: Goßler, Norbert
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2020

description: Acta Praehistorica et Archaeologica, Bd. 45 (2013)
Bericht für 2012 über das DFG-Projekt „Das südwestliche Baltikum im 9. bis 15. Jahrhundert n.Chr. Die Funde der Späteisenzeit, der Wikingerzeit und des Mittelalters aus dem ehemaligen Prussia-Museum Königsberg im Berliner Museum für Vor- und Frühgeschichte“
Creators: name: Goßler, Norbert
name: Jahn, Christoph
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2020

description: Acta Praehistorica et Archaeologica, Bd. 45 (2013)
SENSITIVITY EVALUATION OF 1,8-CINEOLE AGAINST Pseudocercospora fijiensis CAUSING BLACK SIGATOKA LEAF SPOT OF CAVENDISH BANANA
Creators: name: Carizza Alagano
name: Suarez, Geneva
name: Navasca, Abbeah Mae
name: Corcolon, Benny
name: Faustino, Mary Ann
name: Batac, Rene
name: Searle, Martin
Publisher: name: Zenodo
Year: 2021
Subjects: Black Sigatoka, Pseudocercospora fijiensis, Cavendish Banana

description: Black Sigatoka remains to be the most costly disease of banana accounting to about 35% of the production cost. Management of the disease entails application of registered fungicides following an efficient and effective spray program in order to manage the risk of resistance. A wide selection of fungicides is very ideal, however, through the years, only few products are being positioned for Black Sigatoka management thus increasing the chance of Pseudocersopora fijiensis to develop resistance. In these situations, inclusion of resistance-breakers in the spray program becomes imperative in banana plantations. 1,8- cineole is known to degrade cell walls of fungi causing their lysis and death. With the aim to add novel products in the spray program, efficacy of 1,8-cineole against P. fijiensis was determined in vitro following the method set by Fungicide Resistance Action Committee (FRAC
Microwave-frequency scanning gate microscopy of a Si/SiGe double quantum dot
Creators: name: Denisov, Artem O.
name: Oh, Seong W.
name: Fuchs, Gordian
name: Mills, Adam R.
name: Chen, Pengcheng
name: Anderson, Christopher R.
name: Gyure, Mark F.
name: Barnard, Arthur W.
name: Petta, Jason R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Conventional quantum transport methods can provide quantitative information on spin, orbital, and valley states in quantum dots, but often lack spatial resolution. Scanning tunneling microscopy, on the other hand, provides exquisite spatial resolution of the local electronic density of states, but often at the expense of speed. Working to combine the spatial resolution and energy sensitivity of scanning probe microscopy with the speed of microwave measurements, we couple a metallic probe tip to a Si/SiGe double quantum dot that is integrated with a local charge detector. We first demonstrate that a dc-biased tip can be used to change the charge occupancy of the double dot. We then apply microwave excitation through the scanning tip to drive photon-assisted tunneling transitions in the double dot. We infer the double dot energy level diagram from the frequency and detuning dependence of the photon-assisted tunneling resonance condition. These measurements allow us to resolve $\sim$65 $μ$eV excited states, an energy scale consistent with typical valley splittings in Si/SiGe. Future extensions of this approach may allow spatial mapping of the valley splitting in Si devices, which is of fundamental importance for spin-based quantum processors.
Approximate L-State Solution of the Rotating Trigonometric Pöschl-Teller Potential
Creators: name: Hamzavi, Majid
name: Ikhdair, Sameer M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The trigonometric Pöschl-Teller (PT) potential describes the diatomic molecular vibration. We have obtained the approximate solutions of the radial Schrödinger equation (SE) for the rotating trigonometric PT potential using the Nikiforov-Uvarov (NU) method. The energy eigenvalues and their corresponding eigenfunctions are calculated for arbitrary -states in closed form. In the low screening region, when the screening parameter the potential reduces to Kratzer potential. Further, some numerical results are presented for several diatomic molecules.
description: 14 pages, 5 Figures; Accepted Molecular Physics 2012
Tunable bulk photovoltaic effect in strained $γ$-GeSe
Creators: name: Min, Hong-Guk
name: Lyi, Churlhi
name: Kim, Youngkuk
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recently, Lee \textit{et. al.} [Nano Lett. \textbf{21}, 4305 (2021)] newly synthesized monochalcogenide GeSe in a polar phase, referred to as $γ$-phase. Motivated by this work, we study shift current of $γ$-GeSe and its tunability via an in-plane uniaxial strain. Using first-principles calculations, we uncover the electronic structure of the strained $γ$-GeSe systems. We then calculate frequency-dependent shift current conductivities at various strains. The tunability is demonstrated to enhance the shift current up to $\sim$ 20 $μ$A/V$^2$. Moreover, the direction of shift current can be inverted by a light strain. Markedly, an anomalous behavior is found in the zero-frequency limit, which can be an indicative of band inversion and a potential topological phase transition driven by the strain. Our results suggest that shift current can be a tangible prove of bulk electronic states of $γ$-GeSe.
POTENTIAL OF 1,8-CINEOLE IN THE MANAGEMENT OF FUSARIUM WILT OF CAVENDISH BANANA CAUSED BY Fusarium odoratissimum TROPICAL RACE 4
Creators: name: Sheandell Kaye Balacuit
name: Carizza Alagano
name: Navasca, Abbeah Mae
name: Corcolon, Benny
name: Faustino, Mary Ann
name: Batac, Rene
name: Searle, Martin
Publisher: name: Zenodo
Year: 2021
Subjects: Fusarium, TR4, banana, Cavendish, 1,8-cineole

description: Damage of Fusarium Wilt to banana plantations has been a serious threat to banana growers worldwide since the wipeout of Gros Michel in Panama in 1950s. Over the years, strict and cautious implementation of biosecurity protocols contributed in preventing the entry of Fusarium odoratissimum Tropical Race 4 (FoTR4) while total eradication of an infected plant has restricted the spread within an area. Although these procedures have significant effect towards managing disease incidence, raw materials and labor costs are very high and productivity is also reduced. With this, search of products that provide effective control of the disease without harming the plant is continuously done. 1,8-cineole is a secondary metabolite that is known to have anti-inhibitory effect to microorganisms. With this, potential of 1,8-Cineole against the pathogen was explored in vitro and at screenhouse set-up.
Structure and production mechanism of the enigmatic $X(3872)$ in high-energy hadronic reactions
Creators: name: Cisek, Anna
name: Schäfer, Wolfgang
name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the total cross section and transverse momentum distributions for the production of enigmatic $χ_{c,1}(3872)$ (or X(3872)) assuming different scenarios: $c \bar c$ state and $D^{0*} {\bar D}^0 + D^0 {\bar D}^{0*}$ molecule. The derivative of the $c \bar c$ wave function needed in the first scenario is taken from a potential model calculations. Compared to earlier calculation of molecular state we include not only single parton scattering (SPS) but also double parton scattering (DPS) contributions. The latter one seems to give smaller contribution than the SPS one. The upper limit for the DPS production of $χ_{c,1}(3872)$ is much below the CMS data. We compare results of our calculations with existing experimental data of CMS, ATLAS and LHCb collaborations. Reasonable cross sections can be obtained in either $c \bar c$ or molecular $D {\bar D}^*$ scenarios for $X(3872)$. Also a hybrid scenario is not excluded.
description: 17 pages, 7 figures, v2: references added, v3: a diagram added, minor changes
Cold flows and the first quasars
Creators: name: Di Matteo, Tiziana
name: Khandai, Nishikanta
name: DeGraf, Colin
name: Feng, Yu
name: Croft, Rupert
name: Lopez, Julio
name: Springel, Volker
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Observations of the most distant bright quasars imply that billion solar mass supermassive black holes (SMBH) have to be assembled within the first eight hundred million years. Under our standard galaxy formation scenario such fast growth implies large gas densities providing sustained accretion at critical or supercritical rates onto an initial black hole seed. It has been a long standing question whether and how such high black hole accretion rates can be achieved and sustained at the centers of early galaxies. Here we use our new cosmological hydrodynamic simulation (MassiveBlack) covering a volume (0.75 \Gpc)^3 appropriate for studying the rare first quasars to show that steady high density cold gas flows responsible for assembling the first galaxies produce the high gas densities that lead to sustained critical accretion rates and hence rapid growth commensurate with the existence of ~10^9 solar mass black holes as early as z~7. We find that under these conditions quasar feedback is not effective at stopping the cold gas from penetrating the central regions and hence cannot quench the accretion until the host galaxy reaches M_halo > 10^{12} solar masses. This cold-flow driven scenario for the formation of quasars implies that they should be ubiquitous in galaxies in the early universe and that major (proto)galaxy mergers are not a requirement for efficient fuel supply and growth, particularly for the earliest SMBHs.
description: 6 pages, 4 figures
Das Rheinisches Landesmuseum Bonn / Rheinisches Amt für Bodendenkmalpflege im Jahr 1983. Bericht des Direktors
Creators: name: Redaktion, Die
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 185.1985: Bonner Jahrbücher
Interacting electrons and bosons in the doubly screened $G\widetilde{W}$ approximation: A time-linear scaling method for first-principles simulations
Creators: name: Pavlyukh, Yaroslav
name: Perfetto, Enrico
name: Stefanucci, Gianluca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We augment the time-linear formulation of the Kadanoff-Baym equations for systems of interacting electrons and quantized phonons or photons with the $G\widetilde{W}$ approximation, the Coulomb interaction $\widetilde{W}$ being dynamically screened by both electron-hole pairs {\em and} bosonic particles. We also show how to combine different approximations to include simultaneously multiple correlation effects in the dynamics. The final outcome is a versatile framework comprising $2^{12}$ distinct diagrammatic methods, each scaling linearly in time and preserving all fundamental conservation laws. The dramatic improvement over current state-of-the-art approximations brought about by $G\widetilde{W}$ is demonstrated in a study of the correlation-induced charge migration of the glycine molecule in an optical cavity.
description: 10 pages, 4 figures, 2 tables
Symmetry breaking Rayleigh-Taylor instability in a two-component Bose-Einstein condensate
Creators: name: Kadokura, Tsuyoshi
name: Aioi, Tomohiko
name: Sasaki, Kazuki
name: Kishimoto, Tetsuo
name: Saito, Hiroki
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The interfacial instability and subsequent dynamics in a phase-separated two-component Bose-Einstein condensate with rotation symmetry are studied. When the interatomic interaction or the trap frequency is changed, the Rayleigh-Taylor instability breaks the rotation symmetry of the interface, which is subsequently deformed into nonlinear patterns including mushroom shapes.
description: 5 pages, 5 figures
Discussion of "Feature Matching in Time Series Modeling" by Y. Xia and H. Tong
Creators: name: Chan, Kung-Sik
name: Tsay, Ruey S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Discussion of "Feature Matching in Time Series Modeling" by Y. Xia and H. Tong [arXiv:1104.3073]
description: Published in at http://dx.doi.org/10.1214/11-STS345B the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Synchronization and sequencing of data acquisition and control electronics at the European X-ray free electron laser
Creators: name: Geßler, Patrick
Publisher: name: TUHH Universitätsbibliothek
Year: 2015
Subjects: subject: timing
subject: synchronization
subject: drift
subject: xfel
subject: daq
classificationCode: 004
subject: Informatik

description: Der Europäische XFEL ist eine Großforschungsanlage, die Serien von kurzen Röntgenpulsen erzeugen und an mehrere Experimentierplätze liefern wird. Diese erlauben detaillierte Untersuchungen in verschiedenen Forschungsfeldern. Um die eingesetzte Kontroll- und Datenaufnahmeelektronik synchronisieren und Abläufe steuern zu können, wird ein verteiltes Zeitgebersystem benötigt. Diese Arbeit beschreibt Planung, Entwicklung, Umsetzung und Evaluierung dieses European XFEL Timing Systems.
description: The European XFEL will generate repetitive bursts of short x-ray laser pulses to several experiment stations, which will allow in-depth research in various scientific fields. In order to accurately synchronize and sequence all control and data acquisition electronics a time reference system is required. This work provides a complete description of the planning, design, realization and evaluation of the European XFEL Timing System.
Role of bulk viscosity in deuteron production in ultrarelativistic nuclear collisions
Creators: name: Everett, D.
name: Oliinychenko, D.
name: Luzum, M.
name: Paquet, J. -F.
name: Vujanovic, G.
name: Bass, S. A.
name: Du, L.
name: Gale, C.
name: Heffernan, M.
name: Heinz, U.
name: Kasper, L.
name: Ke, W.
name: Liyanage, D.
name: Majumder, A.
name: Mankolli, A.
name: Shen, C.
name: Soeder, D.
name: Velkovska, J.
name: Angerami, A.
name: Arora, R.
name: Cao, S.
name: Chen, Y.
name: Dai, T.
name: Ehlers, R.
name: Elfner, H.
name: Fan, W.
name: Fries, R. J.
name: Garza, F.
name: He, Y.
name: Jacak, B. V.
name: Jacobs, P. M.
name: Jeon, S.
name: Kelsey, M.
name: Kordell, M.
name: Kumar, A.
name: Latessa, J.
name: Lee, Y. -J.
name: Lopez, A.
name: Mak, S.
name: Martin, C.
name: Mehryar, H.
name: Mengel, T.
name: Mulligan, J.
name: Nattrass, C.
name: Putschke, J. H.
name: Roland, G.
name: Schenke, B.
name: Schwiebert, L.
name: Silva, A.
name: Sirimanna, C.
name: Soltz, R. A.
name: Staudenmaier, J.
name: Strickland, M.
name: Tachibana, Y.
name: Wang, X. -N.
name: Wolpert, R. L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We use a Bayesian-calibrated multistage viscous hydrodynamic model to explore deuteron yield, mean transverse momentum and flow observables in LHC Pb-Pb collisions. We explore theoretical uncertainty in the production of deuterons, including (i) the contribution of thermal deuterons, (ii) models for the subsequent formation of deuterons (hadronic transport vs coalescence) and (iii) the overall sensitivity of the results to the hydrodynamic model -- in particular to bulk viscosity, which is often neglected in studies of deuteron production. Using physical parameters set by a comparison to only light hadron observables, we find good agreement with measurements of the mean transverse momentum $\langle p_T \rangle$ and elliptic flow $v_2$ of deuterons; however, tension is observed with experimental data for the deuteron multiplicity in central collisions. The results are found to be sensitive to each of the mentioned theoretical uncertainties, with a particular sensitivity to bulk viscosity, indicating that the latter is an important ingredient for an accurate treatment of deuteron production.
description: 11 pages, 8 figures
Yves Albert Dauge, Le Barbare. Recherches sur la conception romaine de la barbarie et de la civilisation
Creators: name: Wirth, Gerhard
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Yves Albert Dauge, Le Barbare. Recherches sur la conception romaine de la barbarie et de la civilisation. Collection Latomus 176. Edition Latomus, Brüssel 1981. VIII und 859 Seiten.
description: Bonner Jahrbücher, Bd. 185.1985: Bonner Jahrbücher
Random parking, Euclidean functionals, and rubber elasticity
Creators: name: Gloria, Antoine
name: Penrose, Mathew D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60D05, 82B21, 35B27, 74Q05

description: We study subadditive functions of the random parking model previously analyzed by the second author. In particular, we consider local functions $S$ of subsets of $\mathbb{R}^d$ and of point sets that are (almost) subadditive in their first variable. Denoting by $ξ$ the random parking measure in $\mathbb{R}^d$, and by $ξ^R$ the random parking measure in the cube $Q_R=(-R,R)^d$, we show, under some natural assumptions on $S$, that there exists a constant $\bar{S}\in \mathbb{R}$ such that % $$ \lim_{R\to +\infty} \frac{S(Q_R,ξ)}{|Q_R|}\,=\,\lim_{R\to +\infty}\frac{S(Q_R,ξ^R)}{|Q_R|}\,=\,\bar{S} $$ % almost surely. If $ζ\mapsto S(Q_R,ζ)$ is the counting measure of $ζ$ in $Q_R$, then we retrieve the result by the second author on the existence of the jamming limit. The present work generalizes this result to a wide class of (almost) subadditive functions. In particular, classical Euclidean optimization problems as well as the discrete model for rubber previously studied by Alicandro, Cicalese, and the first author enter this class of functions. In the case of rubber elasticity, this yields an approximation result for the continuous energy density associated with the discrete model at the thermodynamic limit, as well as a generalization to stochastic networks generated on bounded sets.
description: 28 pages
The nonequilibrium cost of accurate information processing
Creators: name: Chiribella, Giulio
name: Meng, Fei
name: Renner, Renato
name: Yung, Man-Hong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Accurate information processing is crucial both in technology and in nature. To achieve it, any information processing system needs an initial supply of resources away from thermal equilibrium. Here we establish a fundamental limit on the accuracy achievable with a given amount of nonequilibrium resources. The limit applies to arbitrary information processing tasks and arbitrary information processing systems subject to the laws of quantum mechanics. It is easily computable and is expressed in terms of an entropic quantity, which we name reverse entropy, associated to a time reversal of the information processing task under consideration. The limit is achievable for all deterministic classical computations and for all their quantum extensions. As an application, we establish the optimal tradeoff between nonequilibrium and accuracy for the fundamental tasks of storing, transmitting, cloning, and erasing information. Our results set a target for the design of new devices approaching the ultimate efficiency limit, and provide a framework for demonstrating thermodynamical advantages of quantum devices over their classical counterparts.
description: 10 + 28 pages, 3 figures, new results added
On the Jacobi capture origin of binaries with applications to the Earth-Moon system and black holes in galactic nuclei
Creators: name: Boekholt, Tjarda C. N.
name: Rowan, Connar
name: Kocsis, Bence
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Chaotic Dynamics (nlin.CD)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Close encounters between two bodies in a disc often result in a single orbital deflection. However, within their Jacobi volumes, where the gravitational forces between the two bodies and the central body become competitive, temporary captures with multiple close encounters become possible outcomes: a Jacobi capture. We perform 3-body simulations in order to characterise the dynamics of Jacobi captures in the plane. We find that the phase space structure resembles a Cantor-like set with a fractal dimension of about 0.4. The lifetime distribution decreases exponentially, while the distribution of the closest separation follows a power law with index 0.5. In our first application, we consider the Jacobi capture of the Moon. We demonstrate that both tidal captures and giant impacts are possible outcomes. The impact speed is well approximated by a parabolic encounter, while the impact angles follow that of a uniform beam on a circular target. Jacobi captures at larger heliocentric distances are more likely to result in tidal captures. In our second application, we find that Jacobi captures with gravitational wave dissipation can result in the formation of binary black holes in galactic nuclei. The eccentricity distribution is approximately super-thermal and includes both prograde and retrograde orientations. We conclude that dissipative Jacobi captures form an efficient channel for binary formation, which motivates further research into establishing the universality of Jacobi captures across multiple astrophysical scales.
description: Accepted by MNRAS. 19 pages, 16 figures
Simulation of the shape memory effect in a NiTi nano model system
Creators: name: Mutter, Daniel
name: Nielaba, Peter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The shape memory behavior of a NiTi nanoparticle is analyzed by molecular dynamics simulations. After a detailed description of the equilibrium structures of the used model potential, the multi variant martensitic ground state, which depends on the geometry of the particle, is discussed. Tensile load is applied, changing the variant configuration to a single domain state with a remanent strain after unloading. Heating the particle leads to a shape memory effect without a phase transition to the austenite, but by variant reorientation and twin boundary formation at a certain temperature. These processes are described by stress-strain and strain-temperature curves, together with a visualization of the microstructure of the nanoparticle. Results are presented for five different Ni concentrations in the vicinity of 50%, showing for example, that small deviations from this ideal composition can influence the critical temperature for shape recovery significantly.
description: 7 pages, 4 figures; accepted for publication in the "Journal of Alloys and Compounds"
Discovery of a maximally charged Weyl point
Creators: name: Chen, Qiaolu
name: Chen, Fujia
name: Yan, Qinghui
name: Zhang, Li
name: Gao, Zhen
name: Yang, Shengyuan A.
name: Yu, Zhi-Ming
name: Chen, Hongsheng
name: Zhang, Baile
name: Yang, Yihao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The hypothetical Weyl particles in high-energy physics have been discovered in three-dimensional crystals as collective quasiparticle excitations near two-fold degenerate Weyl points. Such momentum-space Weyl particles carry quantized chiral charges, which can be measured by counting the number of Fermi arcs emanating from the corresponding Weyl points. It is known that merging unit-charged Weyl particles can create new ones with more charges. However, only very recently has it been realised that there is an upper limit - the maximal charge number that a two-fold Weyl point can host is four - achievable only in crystals without spin-orbit coupling. Here, we report the experimental realisation of such a maximally charged Weyl point in a three-dimensional photonic crystal. The four charges support quadruple-helicoid Fermi arcs, forming an unprecedented topology of two non-contractible loops in the surface Brillouin zone. The helicoid Fermi arcs also exhibit the long-pursued type-II van Hove singularities that can reside at arbitrary momenta. This discovery reveals a type of maximally charged Weyl particles beyond conventional topological particles in crystals.
description: 17 pages, 4 figures
Optoelectronic Properties and Excitons in Hybridized Boron Nitride and Graphene Hexagonal Monolayers
Creators: name: Bernardi, Marco
name: Palummo, Maurizia
name: Grossman, Jeffrey C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We explain the nature of the electronic band gap and optical absorption spectrum of Carbon - Boron Nitride (CBN) hybridized monolayers using density functional theory (DFT), GW and Bethe-Salpeter equation calculations. The CBN optoelectronic properties result from the overall monolayer bandstructure, whose quasiparticle states are controlled by the C domain size and lie at separate energy for C and BN without significant mixing at the band edge, as confirmed by the presence of strongly bound bright exciton states localized within the C domains. The resulting absorption spectra show two marked peaks whose energy and relative intensity vary with composition in agreement with the experiment, with large compensating quasiparticle and excitonic corrections compared to DFT calculations. The band gap and the optical absorption are not regulated by the monolayer composition as customary for bulk semiconductor alloys and cannot be understood as a superposition of the properties of bulk-like C and BN domains as recent experiments suggested.
On series of dilated functions
Creators: name: Berkes, Istvan
name: Weber, Michel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 54C40, 14E20 (Primary) 46E25, 20C20 (Secondary)

description: Given a periodic function $f$, we study the almost everywhere and norm convergence of series $\sum_{k=1}^\infty c_k f(kx)$. As the classical theory shows, the behavior of such series is determined by a combination of analytic and number theoretic factors, but precise results exist only in a few special cases. In this paper we use connections with orthogonal function theory and GCD sums to prove several new results, improve old ones and also to simplify and unify the theory.
description: 21 pages
Early Black Holes in Cosmological Simulations: Luminosity Functions and Clustering Behaviour
Creators: name: DeGraf, Colin
name: Di Matteo, Tiziana
name: Khandai, Nishikanta
name: Croft, Rupert
name: Lopez, Julio
name: Springel, Volker
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine predictions for the quasar luminosity functions (QLF) and quasar clustering at high redshift (z > 4.75) using MassiveBlack, our new hydrodynamic cosmological simulation which includes a self-consistent model for black hole growth and feedback. We show that the model reproduces the Sloan QLF within observational constraints at z >= 5. We find that the high-z QLF is consistent with a redshift-independent occupation distribution of BHs among dark matter halos (which we provide) such that the evolution of the QLF follows that of the halo mass function. The sole exception is the bright-end at z=6 and 7, where BHs in high-mass halos tend to be unusually bright due to extended periods of Eddington growth caused by high density cold flows into the halo center. We further use these luminosity functions to make predictions for the number density of quasars in upcoming surveys, predicting there should be ~119+-28 (~87+-28) quasars detectable in the F125W band of the WIDE (DEEP) fields of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) from z=5-6, ~19+-7 (~18+-9) from z=6-7, and ~1.7+-1.5 (~1.5+-1.5) from z=7-8. We also investigate quasar clustering, finding that the correlation length is fully consistent with current constraints for Sloan quasars (r_0~17 h^{-1} Mpc at z=4 for quasars above m_i = 20.2), and grows slowly with redshift up to z=6 (r_0~22 h^{-1} Mpc). Finally, we note that the quasar clustering strength depends weakly on luminosity for low L_BH, but gets stronger at higher L_BH as the BHs are found in higher mass halos.
description: 8 pages, 3 figures
Application of Gist SVM in Cancer Detection
Creators: name: Aruna, S.
name: Rajagopalan, S. P.
name: Nandakishore, L. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we study the application of GIST SVM in disease prediction (detection of cancer). Pattern classification problems can be effectively solved by Support vector machines. Here we propose a classifier which can differentiate patients having benign and malignant cancer cells. To improve the accuracy of classification, we propose to determine the optimal size of the training set and perform feature selection. To find the optimal size of the training set, different sizes of training sets are experimented and the one with highest classification rate is selected. The optimal features are selected through their F-Scores.
description: 10 pages
BinPo: An open-source code to compute the band structure of two-dimensional electron systems
Creators: name: Martínez, Emanuel A.
name: Fínez, Juan I. Beltrán
name: Bruno, Flavio Y.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce BinPo, an open-source Python code to compute electronic properties of two-dimensional electron systems. Its usage is focused on the ABO$_3$ perovskite structure based systems, such as SrTiO$_3$ and KTaO$_3$, because of their increasing impact in materials community and possible applications in spintronic devices. BinPo has a Schrödinger-Poisson solver to obtain the self-consistent potential energy in a slab system. The tight binding slab Hamiltonian of the system is created from the transfer integrals in the maximally localized Wannier functions basis, thus reaching a higher accuracy than conventional tight binding methods. The band structure, energy slices, and other properties, along with different projections and orientations can be computed. High resolution and publishable figures of the simulations can be generated. In BinPo, priority has been given to ease-of-use, efficiency, readability and modularity, therefore becoming suitable to produce reliable electronic structures simulations at low computational cost. Along with the code itself, we provide files from first-principles calculations, instructions of use and detailed examples of its wide range of capabilities. We detail the approaches used in the code, so that it can be further exploited and adapted to other problems, such as adding new materials and functionalities which can strength the initial code scopes.
description: 37 pages, 14 figures. This is the preprint version of the manuscript. Code available at https://github.com/emanuelm33/BinPo
Semileptonic decays of $ρ$, $ω$, $ϕ$, $η$ and $η'$ mesons in ground and first radially excited states in the $U(3)\times U(3)$ NJL model
Creators: name: Volkov, M. K.
name: Nurlan, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the extended $U(3)\times U(3)$ NJL model, semileptonic decays of $ρ$, $ω$, $ϕ$, $η$ and $η'$ mesons in both the ground and first radially excited states are described. Quark loops of the anomalous type are considered, which are based on the vertex $η\to VV$. The obtained results are in satisfactory agreement with the existing experimental data. In addition, a number of predictions for experimentally unmeasured decays of radially excited mesons are presented.
description: 6 pages, 2 figures
Do Baryons Alter the Halos of Low Surface Brightness Galaxies?
Creators: name: de Naray, Rachel Kuzio
name: Spekkens, Kristine
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: High-quality observations of dark matter-dominated low surface brightness (LSB) galaxies indicate that, in contrast to the triaxial, centrally-concentrated cuspy halos formed in collisionless simulations of halo assembly, these galaxies reside in round, roughly constant density cored halos. In order to reconcile these data with galaxy formation in the context of LCDM, processes that alter the shape and density structure of the inner halo are required. We compile observational properties of LSB galaxies to evaluate the plausibility that a previously higher baryonic mass content and feedback from star formation can modify the dark matter halos of these galaxies. We also compare the properties of bulgeless disk galaxies formed in recent simulations to the LSB galaxy sample. We find that observational constraints on LSB galaxy star formation histories, structure, and kinematics make it difficult for baryonic physics to sphericalize and decrease the central density of the dark matter halos of LSB galaxies.
description: Accepted for publication in ApJL; 6 pages, 1 figure, 1 table