cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Photocurrent in graphene harnessed by tunable intrinsic plasmons
Creators: name: Freitag, Marcus
name: Low, Tony
name: Zhu, Wenjuan
name: Yan, Hugen
name: Xia, Fengnian
name: Avouris, Phaedon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Graphene's optical properties in the infrared and terahertz can be tailored and enhanced by patterning graphene into periodic metamaterials with sub-wavelength feature sizes. Here we demonstrate polarization sensitive and gate tunable photodetection in graphene nanoribbon arrays. The long-lived hybrid plasmon-phonon modes utilized are coupled excitations of electron density oscillations and substrate (SiO2) surface polar phonons. Their excitation by s-polarization leads to an in-resonance photocurrent an order of magnitude larger than the photocurrent observed for p-polarization, which excites electron-hole pairs. The plasmonic detectors exhibit photoinduced temperature increases up to four times as large as comparable 2D graphene detectors. Moreover, the photocurrent sign becomes polarization sensitive in the narrowest nanoribbon arrays due to differences in decay channels for photoexcited hybrid plasmon-phonons and electrons. Our work provides a path to light sensitive and frequency selective photodetectors based on graphene's plasmonic excitations.
Reconstruction of the environmental correlation function from single emitter photon statistics: a non-Markovian approach
Creators: name: Shikerman, Faina
name: Horwitz, Lawrence
name: Pe'er, Avi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the two-level system approximation of a single emitter driven by a continuous laser pump and simultaneously coupled to the electromagnetic vacuum and to a thermal reservoir beyond the Markovian approximation. We discuss the connection between a rigorous microscopic theory and the phenomenological spectral diffusion approach, used to model the interaction of the emitter with the thermal bath, and obtained analytic expressions relating the thermal correlation function to the single emitter photon statistics.
The influence of multiple ionization thresholds on harmonic generation: Ar+
Creators: name: Brown, A. C.
name: van der Hart, H. W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We apply time-dependent R-matrix theory to investigate harmonic generation from ground state Ar+ with M=0 at a wavelength of 390 nm. Contributions associated with the different 3s(2)3p(4) ionization thresholds are assessed, including the interference between these. The dominant contribution originates from the second ionization threshold, 3s(2)3p(4) (1)D. Changes to the harmonic yields arising from the higher 3s3p(5) thresholds are also assessed. We further confirm that Ar+ has a higher harmonic yield than He for the same laser pulse, despite having a higher ionization threshold.
description: 5 pages, 4 figures, 1 table
Santa Fe Festival Ballet, Program #2
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021

description: Note from Santa Fe Ballet; tape includes "Pulcinella Suite" (Music by Igor Stravinsky, Coreography Alex Ossadnik) "Clair de Lune" (ClaudeDebussy, Peter Anastos) "Premier Quatuor" (Debussy, Ossadnik), "Vive la France" (Jaques Ibert, Anastos)
Optomechanical Transductions in Single and Coupled Wheel Resonators
Creators: name: Huang, Chenguang
name: Fan, Jiahua
name: Zhang, Ruoyu
name: Zhu, Lin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this report, the optomechanical transductions in both single and two side-coupled wheel resonators are investigated. In the single resonator, the optomechanical transduction sensitivity is determined by the optical and mechanical quality factors of the resonator. In the coupled resonators, the optomechanical transduction is related to the energy distribution in the two resonators, which is strongly dependent on the input detuning. Compared to a single resonator, the coupled resonators can still provide very sensitive optomechanical transduction even if the optical and mechanical quality factors of one resonator are degraded.
Bouncing ball dynamics: simple model of motion of the table and sinusoidal motion
Creators: name: Okniński, Andrzej
name: Radziszewski, Bogusław
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 70B05, 70F35 (Primary)

description: Nonlinear dynamics of a bouncing ball moving vertically in a gravitational field and colliding with a moving limiter is considered and the Poincaré map, describing evolution from an impact to the next impact, is described. Displacement of the table is approximated in one period by four cubic polynomials. Results obtained for this model are used to elucidate dynamics of the standard model of bouncing ball with sinusoidal motion of the limiter.
description: LaTeX, 23 pages, 5 figures
Empirical Links between XRB and AGN accretion using the complete z<0.4 spectroscopic CSC/SDSS Catalog
Creators: name: Trichas, Markos
name: Green, Paul
name: Constantin, Anca
name: Aldcroft, Tom
name: Sobolewska, Malgosia
name: Hyde, Ashley K.
name: Zhou, Hongyan
name: Kim, Dong-Woo
name: Haggard, Daryl
name: Kelly, Brandon
name: Kalfountzou, Eleni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Striking similarities have been seen between accretion signatures of Galactic X-ray binary (XRB) systems and active galactic nuclei (AGN). XRB spectral states show a V-shaped correlation between X-ray spectral hardness and Eddington ratio as they vary, and some AGN samples reveal a similar trend, implying analogous processes at vastly larger masses and timescales. To further investigate the analogies, we have matched 617 sources from the Chandra Source Catalog to SDSS spectroscopy, and uniformly measured both X-ray and optical spectral characteristics across a broad range of AGN and galaxy types. We provide useful tabulations of X-ray spectral slope for broad and narrow line AGN, star-forming and passive galaxies and composite systems, also updating relationships between optical (Ha and [OIII]) line emission and X-ray luminosity. We further fit broadband spectral energy distributions with a variety of templates to estimate bolometric luminosity. Our results confirm a significant trend in AGN between X-ray spectral hardness and Eddington ratio expressed in X-ray luminosity, albeit with significant dispersion. The trend is not significant when expressed in the full bolometric or template-estimated AGN luminosity. We also confirm a relationship between the X-ray/optical spectral slope aox, and Eddington ratio, but it may not follow the trend predicted by analogy with XRB accretion states.
description: 12 pages, 10 figures, submitted to ApJ. Full online table will be provided via ApJ
A Self-Organizing Neural Scheme for Door Detection in Different Environments
Creators: name: Mahmood, F.
name: Kunwar, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Doors are important landmarks for indoor mobile robot navigation and also assist blind people to independently access unfamiliar buildings. Most existing algorithms of door detection are limited to work for familiar environments because of restricted assumptions about color, texture and shape. In this paper we propose a novel approach which employs feature based classification and uses the Kohonen Self-Organizing Map (SOM) for the purpose of door detection. Generic and stable features are used for the training of SOM that increase the performance significantly: concavity, bottom-edge intensity profile and door edges. To validate the robustness and generalizability of our method, we collected a large dataset of real world door images from a variety of environments and different lighting conditions. The algorithm achieves more than 95% detection which demonstrates that our door detection method is generic and robust with variations of color, texture, occlusions, lighting condition, scales, and viewpoints.
description: Page No 13-18, 7 figures, Published with International Journal of Computer Applications (IJCA)
A robust tree method for pricing American options with CIR stochastic interest rate
Creators: name: Appolloni, Elisa
name: Caramellino, Lucia
name: Zanette, Antonino
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Finance (q-fin.CP)
subject: FOS: Economics and business
subject: 91G60, 60H30, 65C20

description: We propose a robust and stable lattice method which permits to obtain very accurate American option prices in presence of CIR stochastic interest rate without any numerical restriction on its parameters. Numerical results show the reliability and the accuracy of the proposed method.
Numerical investigations of the Schwinger model and selected quantum spin models
Creators: name: Szyniszewski, Marcin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Numerical investigations of the XY model, the Heisenberg model and the J-J' Heisenberg model are conducted, using the exact diagonalisation, the numerical renormalisation and the density matrix renormalisation group approach. The low-lying energy levels are obtained and finite size scaling is performed to estimate the bulk limit values. The results are found to be consistent with the exact values. The DMRG results are found to be most promising. The Schwinger model is also studied using the exact diagonalisation and the strong coupling expansion. The massless, the massive model and the model with a background electric field are explored. Ground state energy, scalar and vector particle masses and order parameters are examined. The achieved values are observed to be consistent with previous results and theoretical predictions. Path to the future studies is outlined.
description: 86 pages, 56 figures, Master's Thesis
Synchrotron VUV radiation studies of the D^1Π_u State of H_2
Creators: name: Dickenson, G. D.
name: Ivanov, T. I.
name: Roudjane, M.
name: de Oliveira, N.
name: Joyeux, D.
name: Nahon, L.
name: Tchang-Brillet, W. -Ü L.
name: Glass-Maujean, M.
name: Haar, I.
name: Ehresmann, A.
name: Ubachs, W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The 3pπD^1Π_u state of the H_2 molecule was reinvestigated with different techniques at two synchrotron installations. The Fourier-Transform spectrometer in the vacuum ultraviolet wavelength range of the DESIRS beamline at the SOLEIL synchrotron was used for recording absorption spectra of the D^1Π_u state at high resolution and high absolute accuracy, limited only by the Doppler contribution at 100 K. From these measurements line positions were extracted, in particular for the narrow resonances involving ^1Π_u^- states, with an accuracy estimated at 0.06 cm^{-1} . The new data also closely match MQDT-calculations performed for the Π^- components observed via the narrow Q-lines. The Λ-doubling in the D^1Π_u state was determined up to v=17. The 10 m normal incidence scanning monochromator at the beamline U125/2 of the BESSY II synchrotron, combined with a home built target chamber and equipped with a variety of detectors was used to unravel information on ionization, dissociation and intramolecular fluorescence decay for the D^1Π_u vibrational series. The combined results yield accurate information of the characteristic Beutler-Fano profiles associated with the strongly predissociated Π_u^+ parity components of the D^1Π_u-levels. Values for the parameters describing the predissociation width as well as the Fano-q line shape parameters for the J=1 and J=2 rotational states were determined for the sequence of vibrational quantum numbers up to v=17.
description: 11 pages, 9 figures, 1 table
Strange and charm meson masses from twisted mass lattice QCD
Creators: name: Kalinowski, Martin
name: Wagner, Marc
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present first results of a 2+1+1 flavor twisted mass lattice QCD computation of strange and charm meson masses. We focus on D and D_s mesons with spin J = 0,1 and parity P = -,+.
description: 3 pages, 1 figure, poster presented at "Quark Confinement and the Hadron Spectrum X", October 8 - 12 2012, Munich, Germany
B- and A-Type Stars in the Taurus-Auriga Star Forming Region
Creators: name: Mooley, Kunal P.
name: Hillenbrand, Lynne A.
name: Rebull, Luisa M.
name: Padgett, Deborah L.
name: Knapp, Gillian R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We describe the results of a search for early-type stars associated with the Taurus-Auriga molecular cloud complex, a diffuse nearby star-forming region noted as lacking young stars of intermediate and high mass. We investigate several sets of possible O, B and early A spectral class members. The first is a group of stars for which mid-infrared images show bright nebulae, all of which can be associated with stars of spectral type B. The second group consists of early-type stars compiled from (i) literature listings in SIMBAD; (ii) B stars with infrared excesses selected from the Spitzer Space Telescope survey of the Taurus cloud; (iii) magnitude- and color-selected point sources from the 2MASS; and (iv) spectroscopically identified early-type stars from the SDSS coverage of the Taurus region. We evaluated stars for membership in the Taurus-Auriga star formation region based on criteria involving: spectroscopic and parallactic distances, proper motions and radial velocities, and infrared excesses or line emission indicative of stellar youth. For selected objects, we also model the scattered and emitted radiation from reflection nebulosity and compare the results with the observed spectral energy distributions to further test the plausibility of physical association of the B stars with the Taurus cloud. This investigation newly identifies as probable Taurus members three B-type stars: HR 1445 (HD 28929), tau Tau (HD 29763), 72 Tau (HD 28149), and two A-type stars: HD 31305 and HD 26212, thus doubling the number of stars A5 or earlier associated with the Taurus clouds. Several additional early-type sources including HD 29659 and HD 283815 meet some, but not all, of the membership criteria and therefore are plausible, though not secure, members.
description: 31 pages, 18 figures, 6 tables. Accepted for publication in The Astrophysical Journal
Influence of the dissipation mechanism on collisionless magnetic reconnection in symmetric and asymmetric current layers
Creators: name: Aunai, Nicolas
name: Hesse, Michael
name: Black, Carrie
name: Evans, Rebekah
name: Kuznetsova, Maria
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Numerical studies implementing different versions of the collisionless Ohm's law have shown a reconnection rate insensitive to the nature of the non-ideal mechanism occuring at the X line, as soon as the Hall effect is operating. Consequently, the dissipation mechanism occurring in the vicinity of the reconnection site in collisionless systems is usually thought not to have a dynamical role beyond the violation of the frozen-in condition. The interpretation of recent studies have however led to the opposite conclusion that the electron scale dissipative processes play an important dynamical role in preventing an elongation of the electron layer from throttling the reconnection rate. This work re-visits this topic with a new approach. Instead of focusing on the extensively studied symmetric configuration, we aim to investigate whether the macroscopic properties of collisionless reconnection are affected by the dissipation physics in asymmetric configurations, for which the effect of the Hall physics is substantially modified. because it includes all the physical scales a priori important for collisionless reconnection (Hall and ion kinetic physics) and also because it allows one to change the nature of the non-ideal electron scale physics, we use a 2D hybrid model. The effects of numerical, resistive and hyper-resistive dissipation are studied. In a first part we perform simulations of symmetric reconnection with different non-ideal electron physics. we show that the model captures the already known properties of collisionless reconnection. In a second part, we focus on an asymmetric configuration where the magnetic field strength and the density are both asymmetric. Our results show that contrary to symmetric reconnection, the asymmetric model evolution strongly depends on the nature of the mechanism which breaks the field line connectivity
description: accepted in Physics of Plasmas, 12 pages
title: Schönheit der Form und technische Vollendung. Die Sammlung der Bayerischen Landesgewerbeanstalt (LGA) im Germanischen Nationalmuseum
Creators: name: Schröer, Susanne
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 1 (2004): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Linearized plastic plate models as Gamma-limits of 3D finite elastoplasticity
Creators: name: Davoli, Elisa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 74C05 (74G65, 74K20, 49J45)

description: The subject of this paper is the rigorous derivation of reduced models for a thin plate by means of Γ-convergence, in the framework of finite plasticity. Denoting by ε the thickness of the plate, we analyse the case where the scaling factor of the elasto-plastic energy is of order ε^(2α-2), with α>=3. According to the value of α, partially or fully linearized models are deduced, which correspond, in the absence of plastic deformation, to the Von Karman plate theory and the linearized plate theory.
description: 19 pages
A Portrait of Giselle
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Ballet

description: As host Sir Anton Dolin prepares New York City Ballet's Patricia McBride for the role of Giselle, he tells the plot of the ballet, gives the history of its performance, and lends insight into the technical and dramatic expertise required of its dancers. Presents footage of performances of, and interviews with, celebrated ballerinas who have danced the role of Giselle, including Carla Fracci, Natalia Makarova, and Olga Spessivtzeva among others. Cut out from TV Guide indicates this is a discussion from 8 ballerinas about the demands of dancing Giselle.
Investigating the performance of Correspondence Algorithms in Vision based Driver-assistance in Indoor Environment
Creators: name: Mahmood, F.
name: Haider, Syed. M. B.
name: Kunwar, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper presents the experimental comparison of fourteen stereo matching algorithms in variant illumination conditions. Different adaptations of global and local stereo matching techniques are chosen for evaluation The variant strength and weakness of the chosen correspondence algorithms are explored by employing the methodology of the prediction error strategy. The algorithms are gauged on the basis of their performance on real world data set taken in various indoor lighting conditions and at different times of the day
description: 7 pages, 9 figures,Published with International Journal of Computer Applications (IJCA)
Carrier density dependence of the magnetic properties in iron-doped Bi2Se3 topological insulator
Creators: name: Li, H.
name: Song, Y. R.
name: Yao, Meng-Yu
name: Zhu, Fengfeng
name: Liu, Canhua
name: Gao, C. L.
name: Jia, Jin-Feng
name: Qian, Dong
name: Yao, X.
name: Shi, Y. J.
name: Wu, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic and magnetic properties of iron-doped topological insulator Bi1.84-xFe0.16CaxSe3 single crystals were studied. By co-doping Fe and Ca atoms, ferromagnetic bulk states with different carrier density (from n-type to p-type) were obtained. Effective magnetic moments for each Fe atom was estimated as small as about 0.07$μ$B. Magnetic and non-magnetic phases separation was observed in all samples. Our results suggest that the bulk ferromagnetism in Fe-doped Bi2Se3 is not intrinsic and regardless of carrier density.
Michael Downing: Promotional Excerpts and Choreographic Works
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021

description: Excerpts of "TEXAS" "are one" "and the rose" "Dance Front II," "Fred and Ginger," "One thing and another" "Parade" "Eche Other" "Informa(c)tion" full length recordings of "are one" "and the rose" "TEXAS," Informa(c)tion" "Parade" "Dance Front II"
Thermodynamics of Ferromagnetic Spin Chains in a Magnetic Field: Impact of the Spin-Wave Interaction
Creators: name: Hofmann, Christoph P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The thermodynamic properties of ferromagnetic spin chains have been the subject of many publications. Still, the problem of how the spin-wave interaction manifest itself in these low-temperature series has been neglected. Using the method of effective Lagrangians, we explicitly evaluate the partition function of ferromagnetic spin chains at low temperatures and in the presence of a magnetic field up to three loops in the perturbative expansion where the spin-wave interaction sets in. We discuss in detail the renormalization and numerical evaluation of a particular three-loop graph and derive the low-temperature series for the free energy density, energy density, heat capacity, entropy density, as well as the magnetization and the susceptibility. In the low-temperature expansion for the free energy density, the spin-wave interaction starts manifesting itself at order $T^{5/2}$. In the pressure, the coefficient of the $T^{5/2}$-term is positive, indicating that the spin-wave interaction is repulsive. While it is straightforward to go up to three-loop order in the effective loop expansion, the analogous calculation on the basis of conventional condensed matter methods, such as spin-wave theory, appears to be beyond reach.
description: 24 pages, 3 figures
Explosive transitions to synchronization in networked phase oscillators
Creators: name: Leyva, I.
name: Sendiña-Nadal, I.
name: Almendral, J.
name: Navas, A.
name: Zanin, M.
name: Papo, D.
name: Buldú, J. M.
name: Boccaletti, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We introduce a condition for an ensemble of networked phase oscillators to feature an abrupt, first-order phase transition from an unsynchronized to a synchronized state. This condition is met in a very wide spectrum of situations, and for various oscillators' initial frequency distributions. We show that the occurrence of such transitions is always accompanied by the spontaneous emergence of frequency-degree correlations in random network architectures. We also discuss ways to relax the condition, and to further extend the possibility for the first-order transition to occur, and illustrate how to engineer magnetic-like states of synchronization. Our findings thus indicate how to search for abrupt transitions in real-world applications.
description: (02Oct12) Submitted to Phys Rev Lett
Euler elasticae in the plane and the Whitney--Graustein theorem
Creators: name: Avvakumov, Sergey
name: Karpenkov, Oleg
name: Sossinsky, Alexey
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 57M25, 35A15

description: In this paper, we apply classical energy principles to Euler elasticae, i.e., closed C^2 curves in the plane supplied with the Euler functional U (the integral of the square of the curvature along the curve). We study the critical points of U, find the shapes of the curves corresponding to these critical points and show which of the critical points are stable equilibrium points of the energy given by U, and which are unstable. It turns out that the set of stable equilibrium points coincides with the set of minima of U, so that the corresponding shapes of the curves obtained may be regarded as normal forms of Euler elasticae. In this way, we find the solution of the Euler problem (set in 1744) for plane closed elasticae. As a by-product, we obtain a "mechanical" proof of the Whitney--Graustein theorem on the classification of regular curves in the plane up to regular homotopy (in the particular case of C^2 curves). Besides mathematical theorems, our work includes a computer graphics software which shows, as an animation, how any plane curve evolves to its normal form under a discretized version of gradient descent along the (discretized) Euler functional.
description: 15 pages, 5 figures
Feasibility Analysis of Low Cost Graphical Processing Units for Electromagnetic Field Simulations by Finite Difference Time Domain Method
Creators: name: Choudhari, A V
name: Pande, N A
name: Gupta, M R
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Among several techniques available for solving Computational Electromagnetics (CEM) problems, the Finite Difference Time Domain (FDTD) method is one of the best suited approaches when a parallelized hardware platform is used. In this paper we investigate the feasibility of implementing the FDTD method using the NVIDIA GT 520, a low cost Graphical Processing Unit (GPU), for solving the differential form of Maxwell's equation in time domain. Initially a generalized benchmarking problem of bandwidth test and another benchmarking problem of 'matrix left division is discussed for understanding the correlation between the problem size and the performance on the CPU and the GPU respectively. This is further followed by the discussion of the FDTD method, again implemented on both, the CPU and the GT520 GPU. For both of the above comparisons, the CPU used is Intel E5300, a low cost dual core CPU.
D4.2 Discrete Event Simulation Formalism for Productive, Resource Efficient, and Safe Construction Planning
Creators: name: Jungmann, Manuel
Publisher: name: Zenodo
Year: 2022
Subjects: Construction planning
Digital Twin
Discrete event simulation
Real-time data

description: This deliverable summarises the results of task 4.2 Discrete event simulation formalism for productive, resource-efficient, and safe construction planning. The purpose of this document is to explain how the developed approach can be used to apply data-driven, real-time discrete event simulation during construction execution to manage the ongoing production processes. In close alignment to three demonstration cases of the ASHVIN project, frequently used work process patterns were determined. Derived from the construction work process patterns, discrete event system specification formalisms were developed. During the production process, raw data were gathered in real-time. These collected data were analysed to gain information and knowledge by artificial intelligence about the as-built product and the as-performed process. In particular, activity durations are determined, which are used within stochastic productivity modelling to determine suitable probability density functions. These probability density functions are input for the activity durations in the modelled discrete event simulation. The developed discrete event simulation mechanisms can account for supply-chain logistical, resource dependent, and spatial characteristics of the respective construction site.
 Additionally, disturbances by weather conditions or during material deliveries can be considered. After successful calibration of the model, different construction options are compared by the data-driven discrete event simulation in consideration of Lean Construction principles according to automatically calculated productivity, resource efficiency, and safety-related key performance indicators. Thus, the improvement of future supply-chain logistics, resource allocations, and site layouts can be enabled based on current representations of construction sites as digital twins.
title: ,,24 Stunden''. Nam June Paiks Neonskulptur aus dem Bonner Bundestag
Creators: name: Peters, Ursula
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 2 (2004): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Variational calculation of highly excited rovibrational energy levels of H2O2
Creators: name: Polyansky, Oleg L.
name: Kozin, Igor N.
name: Ovsyannikov, Roman I.
name: Malyszek, Pawel
name: Koput, Jacek
name: Tennyson, Jonathan
name: Yurchenko, Sergei N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Results are presented for highly accurate ab initio variational calculation of the rotation - vibration energy levels of H2O2 in its electronic ground state. These results use a recently computed potential energy surface and the variational nuclear-motion programmes WARV4, which uses an exact kinetic energy (EKE) operator, and TROVE, which uses a numerical expansion for the kinetic energy. The TROVE calculations are performed for levels with high values of rotational excitation, $J$ up to 35. The purely \ai\ calculations of the rovibrational energy levels reproduce the observed levels with a standard deviation of about 1 \cm, similar to that of the $J = 0$ calculation as the discrepancy between theory and experiment for rotational energies within a given vibrational state is substantially determined by the error in the vibrational band origin. Minor adjustments are made to the ab initio equilibrium geometry and to the height of the torsional barrier. Using these and correcting the band origins using the error in $J = 0$ states lowers the standard deviation of the observed $-$ calculated energies to only 0.002 \cm\ for levels up to $J = 10$ and 0.02 \cm\ for all experimentally know energy levels, which extend up to $J = 35$.
description: Journal of Physical Chemistry A (submitted, 2013)
Gravitational lensing of STU black holes
Creators: name: Saadat, Hassan
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we study gravitational lensing by STU black holes. We considered extremal limit of two special cases of zero-charged and one-charged black holes, and obtain the deflection angle. We find that the black hole charge increases the deflection angle.
description: 7 pages, 3 figures. Comments welcome
Low-loss tunable metamaterials using superconducting circuits with Josephson junctions
Creators: name: Jung, Philipp
name: Butz, Susanne
name: Shitov, Sergey V.
name: Ustinov, Alexey V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on experiments with superconducting metamaterials containing Josephson junctions. In these structures, split-ring resonators used in conventional metamaterials are replaced by superconducting loops that are interrupted by Josephson junctions, so called rf-SQUIDs. Like the split-ring resonators, these elements can be seen as LC-resonators that couple to the magnetic field. The advantage of superconducting thin-film metamaterials is that, due to the tunable intrinsic inductance of the Josephson junction, the resonance frequency of the rf-SQUID can be changed by applying an external dc magnetic field. We present experimental results that demonstrate the tunability of the resonance frequency of these devices.
title: Bürgerliche Ahnengalerie. Ferdinand Georg Waldmüllers Bildnisse von Louise Mayer, ihres Gatten Anton sowie ihrer Eltern Matthias und Eleonore Feldmüller
Creators: name: Peters, Ursula
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 3 (2004): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Abelian quiver invariants and marginal wall-crossing
Creators: name: Mozgovoy, Sergey
name: Reineke, Markus
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We prove the equivalence of (a slightly modified version of) the wall-crossing formula of Manschot, Pioline and Sen and the wall-crossing formula of Kontsevich and Soibelman. The former involves abelian analogues of the motivic Donaldson-Thomas type invariants of quivers with stability introduced by Kontsevich and Soibelman, for which we derive positivity and geometricity properties.
description: 24 pages
Disorder-induced valley-orbit hybrid states in Si quantum dots
Creators: name: Gamble, John King
name: Eriksson, M. A.
name: Coppersmith, S. N.
name: Friesen, Mark
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum dots in silicon are promising candidates for implementation of solid-state quantum information processing. It is important to understand the effects of the multiple conduction band valleys of silicon on the properties of these devices. Here we introduce a novel, systematic effective mass theory of valley-orbit coupling in disordered silicon systems. This theory reveals valley-orbit hybridization effects that are detrimental for storing quantum information in the valley degree of freedom, including non-vanishing dipole matrix elements between valley states and altered intervalley tunneling.
description: 7 pages, 3 figures
title: Manfred Gläser (Hrsg.): Lübecker Kolloquium zur Stadtarchäologie im Hanseraum IV: Die Infrastruktur. Lübeck 2004.
Creators: name: Untermann, Matthias
Publisher: name: University Library Heidelberg
Year: 2014

description: Rezension zu: Manfred Gläser (Hrsg.): Lübecker Kolloquium zur Stadtarchäologie im Hanseraum IV: Die Infrastruktur. Lübeck: Verlag Schmidt-Römhild 2004. 573 Seiten mit zahlreichen Abbildungen. ISBN 3-7950-1265-1
Robust site-resolved quantum gates in an optical lattice via inhomogeneous control
Creators: name: Lee, Jae Hoon
name: Montano, Enrique
name: Deutsch, Ivan H.
name: Jessen, Poul S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Ultracold atoms in optical lattices are an important platform for quantum information science, lending itself naturally to quantum simulation of many-body physics and providing a possible path towards a scalable quantum computer. To realize its full potential, atoms at individual lattice sites must be accessible to quantum control and measurement. This challenge has so far been met with a combination of high-resolution microscopes and resonance addressing that have enabled both site-resolved imaging and spin-flips. Here we show that methods borrowed from the field of inhomogeneous control can greatly increase the performance of resonance addressing in optical lattices, allowing us to target arbitrary single-qubit gates on desired sites, with minimal crosstalk to neighboring sites and greatly improved robustness against uncertainty in the lattice position. We further demonstrate the simultaneous implementation of different gates at adjacent sites with a single global control waveform. Coherence is verified through two-pulse Ramsey interrogation, and randomized benchmarking is used to measure an average gate fidelity of ~95%. Our control-based approach to reduce crosstalk and increase robustness is broadly applicable in optical lattices irrespective of geometry, and may be useful also on other platforms for quantum information processing, such as ion traps and nitrogen-vacancy centers in diamond.
description: Originally submitted version. Longer version with some substantive edits to appear in Nature Communications
Neutrino Mixing Angles from Texture Zeros of the Lepton Mass Matrices
Creators: name: Fritzsch, Harald
name: Zhou, Shun
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Taking into account the latest neutrino oscillation data, we study texture zeros of the lepton mass matrices. Assuming the Dirac neutrino mass matrix M_D, the charged-lepton mass matrix M_l and the mass matrix of heavy right-handed Majorana neutrinos M_R to have three texture zeros, we show that the observed neutrino mixing angles can naturally be obtained. The phenomenological implications for the neutrino mass spectrum, the CP-violating phases, the tritium beta decay and the neutrinoless double-beta decay are explored.
description: 14 pages, including 2 PS figures
Seven Pulsars in Binary Systems above the Spin-up Line
Creators: name: Pan, Yuanyue
name: Wang, Na
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using data from the ATNF pulsar catalogue, 186 binary pulsars are shown in the magnetic field versus spin period (B-P) diagram, and their relationship to the spin-up line is investigated. Generally speaking, pulsars in binary systems should be below the spin-up line when they get enough accretion mass from their companions. It is found that there are seven binary pulsars above the spin-up line. Based on the parameters of these seven binary systems, we describe possible reasons why they are above the spin-up line.
description: 3 pages, 1figure, 1table
An experimental evidence-based computational paradigm for new logic-gates in neuronal activity
Creators: name: Vardi, Roni
name: Guberman, Shoshana
name: Goldental, Amir
name: Kanter, Ido
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: We propose a new experimentally corroborated paradigm in which the functionality of the brain's logic-gates depends on the history of their activity, e.g. an OR-gate that turns into a XOR-gate over time. Our results are based on an experimental procedure where conditioned stimulations were enforced on circuits of neurons embedded within a large-scale network of cortical cells in-vitro. The underlying biological mechanism is the unavoidable increase of neuronal response latency to ongoing stimulations, which imposes a non-uniform gradual stretching of network delays.
description: 10 pages, 4 figures, 1 table
Non-Bunch-Davies Anisotropy
Creators: name: Chen, Xingang
name: Wang, Yi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce a generic mechanism that can extend the effects of relic anisotropies at the beginning of inflation to relatively much shorter scales in density perturbations. This is induced by non-Bunch-Davies states of the quantum fluctuations, and can show up in the non-oscillatory components of the density perturbations. This mechanism works for general forms of anisotropies, and, to illustrate it, we use an example of relic vector field. The detailed scale-dependence of these anisotropies can be used to probe the initial quantum state of our universe.
description: 10 pages
Μεθοδολογίες ελέγχου ιδιωτικότητας και ασφάλειας σε ηλεκτρονικά παρεχόμενες υπηρεσίες
Creators: name: Μακρή, Ελένη-Λασκαρίνα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Απαιτήσεις ιδιωτικότητας
subject: Αρχές ιδιωτικότητας
subject: Απαιτήσεις ασφάλειας
subject: Εκτίμηση αντικτύπου ιδιωτικότητας
subject: Γενικός Κανονισμός για την Προστασία των Δεδομένων (ΓΚΠΔ)
subject: Μεθοδολογία ελέγχου
subject: Μετρικές
subject: Χαρακτηριστικά οργανισμού
subject: Υπολογιστικό νέφος

description: Η διδακτορική διατριβή με θέμα "Μεθοδολογίες Ελέγχου Ιδιωτικότητας και Ασφάλειας σε Ηλεκτρονικά Παρεχόμενες Υπηρεσίες" εστιάζει στη διερεύνηση και πειραματική εφαρμογή καινοτόμων λύσεων για την αποτελεσματική προστασία της ιδιωτικότητας των χρηστών ενός οργανισμού και συγκεκριμένα τα δεδομένα που συλλέγει, επεξεργάζεται και αποθηκεύει μέσω των προσφερόμενων υπηρεσιών του. Εφαλτήριο για τη διατριβή αυτή αποτελεί το γεγονός ότι οι χρήστες δε διστάζουν να αποκαλύπτουν μεγάλο όγκο προσωπικών δεδομένων τους ή ακόμα και δεδομένων ειδικών κατηγοριών προκειμένου να χρησιμοποιήσουν υπηρεσίες ενός οργανισμού, θέτοντας έτσι τον εαυτό τους, αλλά και άλλους σε κίνδυνο. Το βασικό ερώτημα που προκύπτει από τα παραπάνω είναι αν μπορούν οι χρήστες να προστατευθούν πραγματικά όταν "προσφέρουν" τα προσωπικά τους δεδομένα τόσο πρόθυμα προκειμένου να ικανοποιήσουν τις "ψηφιακές ανάγκες" τους. Για να απαντηθεί αυτό το ερώτημα, είναι πρώτα απαραίτητο να εκτιμηθεί ο αντίκτυπος από μια πιθανή παραβίαση της ιδιωτικότητάς τους, χρησιμοποιώντας μια μεθοδολογία Εκτίμησης Αντικτύπου Ιδιωτικότητας (Privacy Impact Assessment - PIA). Στο πλαίσιο της παρούσας διατριβής, μετά από εκτενή μελέτη, διαπιστώθηκε ότι υπάρχουν πολλές μεθοδολογίες για να διεξάγει ένας οργανισμός μελέτη εκτίμησης αντικτύπου, αλλά δεν έχει καταγραφεί καμία, μέχρι στιγμής, που να κάνει χρήση μετρικών και συνεπώς να αποφέρει μετρήσιμα αποτελέσματα. Επιπλέον, καμία μεθοδολογία από τις καταγεγραμμένες δεν λαμβάνει υπόψη τα χαρακτηριστικά του οργανισμού (μέγεθος, δραστηριότητες, αριθμός πελατών-χρηστών, τύπο προσφερόμενων υπηρεσιών, κτλ.) κάτι το οποίο επηρεάζει την ακρίβεια των αποτελεσμάτων διεξαγωγής της μελέτης. Αντικείμενο της παρούσας διατριβής, είναι ο σχεδιασμός και η ανάπτυξη μιας μεθοδολογίας, η οποία, λαμβάνοντας σαν είσοδο τις ήδη υπάρχουσες αρχές και απαιτήσεις ιδιωτικότητας καθώς και τις κατηγορίες δεδομένων που χρησιμοποιεί ένας οργανισμός και τα χαρακτηριστικά του, αποφασίζει κατά πόσο ο συγκεκριμένος οργανισμός προστατεύει αποτελεσματικά την ιδιωτικότητα των χρηστών του και συγκεκριμένα τα δεδομένα που συλλέγει, επεξεργάζεται και αποθηκεύει μέσω των προσφερόμενων υπηρεσιών του.
Classical aspects of Hawking radiation verified in analogue gravity experiment
Creators: name: Weinfurtner, Silke
name: Tedford, Edmund W.
name: Penrice, Matthew C. J.
name: Unruh, William G.
name: Lawrence, Gregory A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: There is an analogy between the propagation of fields on a curved spacetime and shallow water waves in an open channel flow. By placing a streamlined obstacle into an open channel flow we create a region of high velocity over the obstacle that can include wave horizons. Long (shallow water) waves propagating upstream towards this region are blocked and converted into short (deep water) waves. This is the analogue of the stimulated Hawking emission by a white hole (the time inverse of a black hole). The measurements of amplitudes of the converted waves demonstrate that they appear in pairs and are classically correlated; the spectra of the conversion process is described by a Boltzmann-distribution; and the Boltzmann-distribution is determined by the determined by the change in flow across the white hole horizon.
description: 17 pages, 10 figures; draft of a chapter submitted to the proceedings of the IX'th SIGRAV graduate school: Analogue Gravity, Lake Como, Italy, May 2011
Η επίδραση των άυλων παγίων στοιχείων και της κεφαλαιοποιημένης δαπάνης έρευνας και ανάπτυξης στη κερδοφόρα και την αγοραία υπεράξια των επιχειρήσεων
Creators: name: Κωστορρίζος, Σωτήριος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Οργανωσιακό κεφάλαιο
subject: Γνωσιακό κεφάλαιο
subject: Αγοραία υπεραξία
subject: Κερδοφορία
subject: Άυλα πάγια

description: Σκοπός της παρούσας μελέτης είναι να διερευνήσει τη συσχέτιση του γνωσιακού κεφαλαίου και του οργανωσιακού κεφαλαίου με την κερδοφορία και την αγοραία υπεραξία των επιχειρήσεων. Ο υπολογισμός του γνωσιακού αλλά και του οργανωσιακού κεφαλαίου πραγματοποιήθηκε με βάση τη μεθοδολογία των (Peters & Taylors, 2017). Χρησιμοποιώντας, λοιπόν, ένα δείγμα επιχειρήσεων από τον κλάδο της τεχνολογίας διαφόρων χωρών για το χρονικό διάστημα 2011- 2020 καταλήξαμε στο συμπέρασμα ότι το γνωσιακό κεφάλαιο και το οργανωσιακό κεφάλαιο επιδρούν θετικά στην αγοραία υπεραξία των επιχειρήσεων και αρνητικά στη κερδοφορία τους.
Ο μετασχηματισμός υπερβάλλοντος πλούτου και εφαρμογές
Creators: name: Βερυκοκίδης, Εμμανουήλ
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Υπερβάλλων πλούτος
subject: Shortfall

description: Στην παρούσα διπλωματική εργασία θα παρουσιασθεί η έννοια του υπερβάλλοντος πλούτου. Αρχικά αφού γίνει μια εισαγωγή στην έννοια, όπως αυτή είναι γνωστή στον απλό κόσμο, θα παρουσιασθεί η σημασία της στην περιοχή των οικονομικών ως μέτρο οικονομικής ανισότητας. Θα γίνει παρουσίαση των καταλληλότερων κατανομών που μπορούν να περιγράψουν ακραίες τιμές παρατηρήσεων στην οικονομική και χρηματοοικονομική ανάλυση. Στη συνέχεια θα δοθεί η σχέση του υπερβάλλοντος πλούτου με το Shortfall VaR, το οποίο χρησιμοποιείται στη διαχείριση κινδύνου ως μέτρο περιγραφής του κινδύνου αγοράς ενός χαρτοφυλακίου περιουσιακών στοιχείων. Τέλος θα γίνει μια αναφορά στις στοχαστικές διατάξεις ενώ ταυτόχρονα θα παρουσιασθεί το μοντέλο του υπερβάλλοντος πλούτου με μερικές ιδιότητές του.