cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Digitale Drecksarbeit
Creators: name: Bosse, Vinzenz
Publisher: name: südostasien – Zeitschrift für Politik • Kultur • Dialog
Year: 2023

description: Philippinen: Der Dokumentarfilm “The Cleaners” schaut hinter die Kulissen von Facebook, Google und Co. In ihrem Auftrag sichten Menschen massenhaft Bilder und Videos mit verstörender Gewalt, Pornografie etc. um die sozialen Netzwerke “sauber” zu halten. Sie tun dies für einen Billiglohn und ohne psychologische Betreuung.
description: südostasien – Zeitschrift für Politik • Kultur • Dialog, Bd. 39 Nr. 2 (2022): Südostasien 4.0? – Die Digitale Transformation und ihre Folgen
Digitale Märkte in Südostasien
Creators: name: Matheis, Tanja Verena
Publisher: name: südostasien – Zeitschrift für Politik • Kultur • Dialog
Year: 2023

description: Südostasien – Digitale Dienstleistungen sind in vielen Alltagsbereichen präsent. Wie steht es um Reichweite und Zugänglichkeit? Wo wird am meisten investiert? Spielt Nachhaltigkeit eine Rolle?
description: südostasien – Zeitschrift für Politik • Kultur • Dialog, Bd. 39 Nr. 2 (2022): Südostasien 4.0? – Die Digitale Transformation und ihre Folgen
Twisting Optomechanical Cavity
Creators: name: Oue, Daigo
name: Matsuo, Mamoru
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Mechanical rotation and oscillation have far lower frequencies than light does; thus they are not coupled to each other conventionally. In this Letter, we show the torsional mechanical oscillation of an optical cavity can be coupled to the optical modes by introducing birefringence, which produces nondegenerate modes in the cavity: ordinary and extraordinary rays. Twisting the cavity mixes them and modulates the electromagnetic energy. We find torsional optomechanical Hamiltonian by quantising the total energy and reveal the torsional oscillation can be resonantly driven by light.
description: accepted in Physical Review A
Magnetic Breakdown in Twisted Bilayer Graphene
Creators: name: Lu, Chi-Ken
name: Fertig, H. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider magnetic breakdown in twisted bilayer graphene where electrons may hop between semiclassical $k$-space trajectories in different layers. These trajectories within a doubled Brillouin zone constitute a network in which an $S$-matrix at each saddle point is used to model tunneling between different layers. Matching of the semiclassical wavefunctions throughout the network determines the energy spectrum. Semiclassical orbits with energies well below that of the saddle points are Landau levels of the Dirac points in each layer. These continuously evolve into {\it both} electron-like and hole-like levels above the saddle point energy. Possible experimental signatures are discussed.
description: 5 pages of main text plus Supplementary Material
Bürger-Beteiligung mit Hilfe von Apps
Creators: name: Popp, Eileen
Publisher: name: südostasien – Zeitschrift für Politik • Kultur • Dialog
Year: 2023

description: Indonesien/Philippinen: Die Digitalisierung bietet neue Möglichkeiten für Information und Engagement. PetaBencana aus Indonesien und TrashCash aus den Philippinen sind Beispiele für App-basierten Katastrophen- und Umweltschutz.
description: südostasien – Zeitschrift für Politik • Kultur • Dialog, Bd. 39 Nr. 2 (2022): Südostasien 4.0? – Die Digitale Transformation und ihre Folgen
A Survey on Distributed Machine Learning
Creators: name: Verbraeken, Joost
name: Wolting, Matthijs
name: Katzy, Jonathan
name: Kloppenburg, Jeroen
name: Verbelen, Tim
name: Rellermeyer, Jan S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The demand for artificial intelligence has grown significantly over the last decade and this growth has been fueled by advances in machine learning techniques and the ability to leverage hardware acceleration. However, in order to increase the quality of predictions and render machine learning solutions feasible for more complex applications, a substantial amount of training data is required. Although small machine learning models can be trained with modest amounts of data, the input for training larger models such as neural networks grows exponentially with the number of parameters. Since the demand for processing training data has outpaced the increase in computation power of computing machinery, there is a need for distributing the machine learning workload across multiple machines, and turning the centralized into a distributed system. These distributed systems present new challenges, first and foremost the efficient parallelization of the training process and the creation of a coherent model. This article provides an extensive overview of the current state-of-the-art in the field by outlining the challenges and opportunities of distributed machine learning over conventional (centralized) machine learning, discussing the techniques used for distributed machine learning, and providing an overview of the systems that are available.
Three-point current correlation functions as probes of Effective Conformal Theories
Creators: name: Betre, Kassahun
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The three-point current correlation function in Euclidean spacetime for a strongly coupled system with non-Abelian global symmetry, $\langle J^a_i(x)J^b_j(y)J^c_k(z)\rangle$, is calculated from the weakly coupled AdS dual. The contribution from the first non-renormalizable bulk operator, $(F_{μν})^3$, is calculated and shown to lead to a polarization structure different from the leading contribution, which comes from the renormalizable $(F_{μν})^2$ operator. The non-renormalizable correction is suppressed by powers of the cutoff scale $Λ$. This suggests a possible experimental probe of the effective description through a measurement of the cutoff scale $Λ$ in strongly coupled condensed matter systems.
Basic Facts about Low-income Children, Children 6 through 11 Years, 2012
Creators: name: Jiang, Yang
name: Ekono, Mercedes M.
name: Skinner, Curtis
Publisher: name: Columbia University
Year: 2014
Subjects: Poor children
Poor families
Poverty
Poverty--Measurement

description: Children under 18 years represent 23 percent of the population, but they comprise 34 percent of all people in poverty. Among all children, 45 percent live in low-income families and approximately one in every five (22 percent) live in poor families. Similarly, among children age 6 through 11 years in middle childhood, 45 percent live in low-income families and 22 percent live in poor families. Being a child in a low-income or poor family does not happen by chance. Parental education and employment, race/ethnicity, and other factors are associated with children's experience of economic insecurity. This fact sheet describes the demographic, socio-economic, and employment characteristics of children in middle childhood and their parents. It highlights the important factors that appear to distinguish low-income and poor children in this age group from their less disadvantaged counterparts.
Exploring Two-Field Inflation in the Wess-Zumino Model
Creators: name: Ellis, John
name: Mavromatos, Nick E.
name: Mulryne, David J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore inflation via the effective potential of the minimal Wess-Zumino model, considering both the real and imaginary components of the complex field. Using transport techniques, we calculate the full allowed range of $n_s$, $r$ and $f_{\rm NL}$ for different choices of the single free parameter, $v$, and present the probability distribution of these signatures given a simple choice for the prior distribution of initial conditions. Our work provides a case study of multi-field inflation in a simple but realistic setting, with important lessons that are likely to apply more generally. For example, we find that there are initial conditions consistent with observations of $n_s$ and $r$ for values of $v$ that would be excluded if only evolutions in the real field direction were to be considered, and that these may yield enhanced values of $f_{\rm NL}$. Moreover, we find that initial conditions fixed at high energy density, where the potential is close to quartic in form, can still lead to evolutions in a concave region of the potential during the observable number of e-folds, as preferred by present data. The Wess-Zumino model therefore provides an illustration that multi-field dynamics must be taken into account when seeking to understand fully the phenomenology of such models of inflation.
description: 19 pages, 6 figures
On the Control of the Residual Circulation and Stratospheric Temperatures in the Arctic by Planetary Wave Coupling
Creators: name: Shaw, Tiffany Ann
name: Perlwitz, Judith
Publisher: name: Columbia University
Year: 2014
Subjects: Atmosphere
Atmospheric chemistry

description: It is well established that interannual variability of eddy (meridional) heat flux near the tropopause controls the variability of Arctic lower-stratospheric temperatures during spring via a modification of the strength of the residual circulation. While most studies focus on the role of anomalous heat flux values, here the impact of total (climatology plus anomaly) negative heat flux events on the Arctic stratosphere is investigated. Utilizing the Interim ECMWF Re-Analysis (ERA-Interim) dataset, it is found that total negative heat flux events coincide with a transient reversal of the residual circulation and cooling of the Arctic lower stratosphere. The negative events weaken the seasonally averaged adiabatic warming.
The analysis provides a new interpretation of the winters of 1997 and 2011, which are known to have the lowest March Arctic lower-stratospheric temperatures in the satellite era. While most winters involve positive and negative heat flux extremes, the winters of 1997 and 2011 are unique in that they only involved extreme negative events. This behavior contributed to the weakest adiabatic downwelling in the satellite era and suggests a dynamical contribution to the extremely low temperatures during those winters that could not be accounted for by diabatic processes alone. While it is well established that dynamical processes contribute to the occurrence of stratospheric sudden warming events via extreme positive heat flux events, the results show that dynamical processes also contribute to cold winters with subsequent impact on Arctic ozone loss. The results highlight the importance of interpreting stratospheric temperatures in the Arctic in the context of the dynamical regime with which they are associated.
Kalman Filtering and Expectation Maximization for Multitemporal Spectral Unmixing
Creators: name: Borsoi, Ricardo Augusto
name: Imbiriba, Tales
name: Closas, Pau
name: Bermudez, José Carlos Moreira
name: Richard, Cédric
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The recent evolution of hyperspectral imaging technology and the proliferation of new emerging applications presses for the processing of multiple temporal hyperspectral images. In this work, we propose a novel spectral unmixing (SU) strategy using physically motivated parametric endmember representations to account for temporal spectral variability. By representing the multitemporal mixing process using a state-space formulation, we are able to exploit the Bayesian filtering machinery to estimate the endmember variability coefficients. Moreover, by assuming that the temporal variability of the abundances is small over short intervals, an efficient implementation of the expectation maximization (EM) algorithm is employed to estimate the abundances and the other model parameters. Simulation results indicate that the proposed strategy outperforms state-of-the-art multitemporal SU algorithms.
Review Essay: Olga Zorzi Pugliese, Castiglione's The Book of the Courtier (Il Libro Del Cortegiano): A Classic in the Making
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2009
Subjects: Literature

description: Book Review of Castiglione's The Book of the Courtier (Il Libro Del Cortegiano): A Classic in the Making by Olga Zorzi Pugliese
HerMES: Spectral Energy Distributions of Submillimeter Galaxies at z >4
Creators: name: Huang, J. -S.
name: Rigopoulou, D.
name: Magdis, G.
name: Rowan-Robinson, M.
name: Dai, Y.
name: Bock, J. J.
name: Burgarella, D.
name: Chapman, S.
name: Clements, D. L.
name: Cooray, A.
name: Farrah, D.
name: Glenn, J.
name: Oliver, S.
name: Smith, A. J.
name: Wang, L.
name: Page, M.
name: Riechers, D.
name: Roseboom, I.
name: Symeonidis, M.
name: Fazio, G. G.
name: Yun, M.
name: Webb, T. M. A.
name: Efstathiou, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a study of the infrared properties for a sample of seven spectroscopically confirmed submillimeter galaxies at $z>$4.0. By combining ground-based near-infrared, Spitzer IRAC and MIPS, Herschel SPIRE, and ground-based submillimeter/millimeter photometry, we construct their Spectral Energy Distributions (SED) and a composite model to fit the SEDs. The model includes a stellar emission component at $λ_{\rm rest} $ 50$\,μ$m. Six objects in the sample are detected at 250 and 350$ μ$m. The dust temperatures for the sources in this sample are in the range of 40$-$80 K, and their $L_{\rm FIR}$ $\sim$ 10$^{13}$ L$_{\odot}$ qualifies them as Hyper$-$Luminous Infrared Galaxies (HyperLIRGs). The mean FIR-radio index for this sample is around $< q > = 2.2$ indicating no radio excess in their radio emission. Most sources in the sample have 24$ μ$m detections corresponding to a rest-frame 4.5$ μ$m luminosity of Log$_{10}$(L$_{4.5}$ / L$_{\odot}$) = 11 $\sim$ 11.5. Their L$_{\rm 4.5}$/$L_{\rm FIR}$ ratios are very similar to those of starburst dominated submillimeter galaxies at $z \sim$ 2. The $L_{\rm CO}-L_{\rm FIR}$ relation for this sample is consistent with that determined for local ULIRGs and SMGs at $z \sim$ 2. We conclude that submillimeter galaxies at $z >$ 4 are hotter and more luminous in the FIR, but otherwise very similar to those at $z \sim$ 2. None of these sources show any sign of the strong QSO phase being triggered.
description: 49 pages, 15 figures. Submitted to ApJ
Maximilianus de Stadlbaur ... ad disputationem publicam pro summis in Theologia honoribus rite capessendis ab ... Paulo Josepho Nardini, ... die XXV. mensis Julii MDCCCXLVI. ... habendam ... invitat; 1846
Creators: name: Nardini, Paul Joseph
name: Stadlbaur, Max von
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2008

description: Enth.: Theses (Dissertatio inauguralis: De daemonibus Novi Testamenti)
Studies on the hollow states of atomic lithium by a density functional approach
Creators: name: Roy, Amlan K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Density functional calculations are performed for twelve $2l2l'$n$l"$ (n$\geq$2) triply excited hollow resonance series of Li, {\em viz.,} 2s$^2$ns $^2$S$^e$, 2s$^2$np $^2$P$^o$, 2s$^2$nd $^2$D$^e$, 2p$^2$ns $^2$D$^e$,$^4$P$^e$, 2s2pns $^4$P$^o$, 2s2pnp $^4$D$^e$, 2p$^2$np $^2$F$^o$,$^4$D$^o$, 2p$^2$nd $^2$G$^e$, $^4$F$^e$ and 2s2pnd $^4$F$^o$, covering a total of about 270 low-, moderately high- and high-lying states, with n as high as up to 25. The work-function-based exchange potential and the nonlinear gradient plus Laplacian included Lee-Yang-Parr correlation energy functional is used. The relevant Kohn-Sham-type equation is solved numerically using the generalized pseudospectral method offering nonuniform, optimal spatial discretization to obtain the orbitals and densities. Except for the one state, the discrepancy in the calculated state energies remains well within 0.98%, whereas the excitation energies deviate by 0.02--0.58% compared to the available experimental and other theoretical results. Additionally companion calculations are also presented for the 37 $3l3l'$n$l"$ (n$\geq$3) doubly hollow states (seven are n=3 intrashell type) of Li with both K and L shells empty (up to n=6) in the photon energy range 175.63--180.51 eV, with varying symmetries and multiplicities. Our calculation shows good agreement with the recent literature data for the only two such doubly hollow states reported so far, {\em viz.,} 3s$^2$3p $^2$P$^o$ and 3s3p$^2$ $^4$P$^e$. The resonance series are found to be inextricably entangled to each other, leading to complicated behavior in their positions. Many new states are reported here for the first time. This provides a simple, efficient and general scheme for the accurate calculation of these and other multiply excited Rydberg series of many-electron atomic systems within density functional theory.
The role of the accretion disk, dust, and jets in the IR emission of low-luminosity AGN
Creators: name: Mason, R. E.
name: Almeida, C. Ramos
name: Levenson, N. A.
name: Nemmen, R.
name: Alonso-Herrero, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use recent high-resolution infrared (IR; 1 - 20 micron) photometry to examine the origin of the IR emission in low-luminosity active galactic nuclei (LLAGN). The data are compared with published model fits that describe the spectral energy distribution of LLAGN in terms of an advection-dominated accretion flow (ADAF), truncated thin accretion disk, and jet. The truncated disk in these models is usually not luminous enough to explain the observed IR emission, and in all cases its spectral shape is much narrower than the broad IR peaks in the data. Synchrotron radiation from the jet appears to be important in very radio-loud nuclei, but the detection of strong silicate emission features in many objects indicates that dust must also contribute. We investigate this point by fitting the IR SED of NGC 3998 using dusty torus and optically thin (tau_MIR ~ 1) dust shell models. While more detailed modeling is necessary, these initial results suggest that dust may account for the nuclear mid-IR emission of many LLAGN.
description: ApJ, accepted; 6 pages, 4 figures
Do as Some Said, or as Most Did?-A Foucauldian Experiment with Nineteenth-Century HIP
Creators: name: Kennaway, George
Publisher: name: Columbia University
Year: 2011
Subjects: Music

description: Performers and researchers who explore performance practices of the late nineteenth and early twentieth centuries frequently come up against a problem recently highlighted by musicologist Daniel Leech-Wilkinson, among others. Comparing recordings of Schubert's "An die Musik" from 1911 and 1997, he observes that the contrast between the two is deeply unsettling, and that the "audience to whom one seems just right may find the other a travesty" (Leech - Wilkinson 2011:2). Recordings by performers like Adelina Patti will reliably induce astonished laughter in an unprepared modern audience, and the slow, heavy portamento of early twentieth -century cellists such as Hans Kronold has a similar effect on conservatory cello students. The contrast between then and now is not simply a matter of different but equally valid performing styles, or a question of, e.g., the degree of portamento employed, which a little audience re-education would eventually make familiar. It appears to challenge a modern audience's very notion of what musical expression is or means. The modern laughter is not derisive. It is provoked by a sudden collision of incongruous performance codes. This paper explores the application of Foucault's concepts of enonce and discours to musical performance, to the peculiar aspects of older performing styles, and to the reactions they produced in the context of nineteenth century annotated editions of chamber music.3 Historically Informed Performance (hereafter referred to as HIP) is supported and sustained by performers and academic researchers. The research is largely positivist and does not generally engage with issues and methodologies typical of the more theoretical musicology that has emerged in recent decades. Likewise, the "cultural turn" has largely escaped performers. The simple practicalities of performance do not fit well with such notions as the death of the author, the decalage between sign and signified, or representations of the Other. Rehearsals are generally not given over to discussions of hermeneutics versus phenomenology. This paper is a preliminary step in showing how such theoretical approaches could be fruitful for both performance practice and scholarship.
Dynamics of warped accretion discs
Creators: name: Tremaine, Scott
name: Davis, Shane W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Accretion discs are present around both stellar-mass black holes in X-ray binaries and supermassive black holes in active galactic nuclei. A wide variety of circumstantial evidence implies that many of these discs are warped. The standard Bardeen--Petterson model attributes the shape of the warp to the competition between Lense--Thirring torque from the central black hole and viscous angular-momentum transport within the disc. We show that this description is incomplete, and that torques from the companion star (for X-ray binaries) or the self-gravity of the disc (for active galactic nuclei) can play a major role in determining the properties of the warped disc. Including these effects leads to a rich set of new phenomena. For example, (i) when a companion star is present and the warp arises from a misalignment between the companion's orbital axis and the black hole's spin axis, there is no steady-state solution of the Pringle--Ogilvie equations for a thin warped disc when the viscosity falls below a critical value; (ii) in AGN accretion discs, the warp can excite short-wavelength bending waves that propagate inward with growing amplitude until they are damped by the disc viscosity. We show that both phenomena can occur for plausible values of the black hole and disc parameters, and briefly discuss their observational implications.
description: 28 pages, 11 figures
The_Universal_Structure_of_National_Scientific_Development
Creators: name: MIAO, LILI
name: Murray, Dakota
name: Ahn, YY
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 461099
subject: Library and information studies not elsewhere classified
classificationCode: 461005
subject: Informetrics
classificationCode: 469999
subject: Other information and computing sciences not elsewhere classified
classificationCode: 461010
subject: Social and community informatics
classificationCode: 460207
subject: Modelling and simulation

description: Addition Data contains economic data from World Bank and other necessary data to reproduce results.
Raw Data contains countries' scientific publication record which is derived from Web of Science.
Wave-absorbing vehicular platoon controller
Creators: name: Martinec, Dan
name: Herman, Ivo
name: Hurák, Zdeněk
name: Šebek, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The paper tailors the so-called wave-based control popular in the field of flexible mechanical structures to the field of distributed control of vehicular platoons. The proposed solution augments the symmetric bidirectional control algorithm with a wave-absorbing controller implemented on the leader, and/or on the rear-end vehicle. The wave-absorbing controller actively absorbs an incoming wave of positional changes in the platoon and thus prevents oscillations of inter-vehicle distances. The proposed controller significantly improves the performance of platoon manoeuvrers such as acceleration/deceleration or changing the distances between vehicles without making the platoon string unstable. Numerical simulations show that the wave-absorbing controller performs efficiently even for platoons with a large number of vehicles, for which other platooning algorithms are inefficient or require wireless communication between vehicles.
Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
Creators: name: Feng, Zexin
name: Zhou, Xiaorong
name: Šmejkal, Libor
name: Wu, Lei
name: Zhu, Zengwei
name: Guo, Huixin
name: González-Hernández, Rafael
name: Wang, Xiaoning
name: Yan, Han
name: Qin, Peixin
name: Zhang, Xin
name: Wu, Haojiang
name: Chen, Hongyu
name: Xia, Zhengcai
name: Jiang, Chengbao
name: Coey, Michael
name: Sinova, Jairo
name: Jungwirth, Tomáš
name: Liu, Zhiqi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Time-reversal symmetry breaking is the basic physics concept underpinning many magnetic topological phenomena such as the anomalous Hall effect (AHE) and its quantized variant. The AHE has been primarily accompanied by a ferromagnetic dipole moment, which hinders the topological quantum states and limits data density in memory devices, or by a delicate noncollinear magnetic order with strong spin decoherence, both limiting their applicability. A potential breakthrough is the recent theoretical prediction of the AHE arising from collinear antiferromagnetism in an anisotropic crystal environment. This new mechanism does not require magnetic dipolar or noncollinear fields. However, it has not been experimentally observed to date. Here we demonstrate this unconventional mechanism by measuring the AHE in an epilayer of a rutile collinear antiferromagnet RuO$_2$. The observed anomalous Hall conductivity is large, exceeding 300 S/cm, and is in agreement with the Berry phase topological transport contribution. Our results open a new unexplored chapter of time-reversal symmetry breaking phenomena in the abundant class of collinear antiferromagnetic materials.
description: 33 pages, 14 figures, 2 tables
Performance Evaluation of Two-Hop Wireless Link under Nakagami-m Fading
Creators: name: Nadia, Afsana
name: Chowdhury, Arifur Rahim
name: Hossain, Md. Shoayeb
name: Islam, Md. Imdadul
name: Amin, M. R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Now-a-days, intense research is going on two-hop wireless link under different fading conditions with its remedial measures. In this paper work, a two-hop link under three different conditions is considered: (i) MIMO on both hops, (ii) MISO in first hop and SIMO in second hop and finally (iii) SIMO in first hop and MISO in second hop. The three models used here give the flexibility of using STBC (Space Time Block Coding) and combining scheme on any of the source to relay (S- R) and relay to destination (R-D) link. Even incorporation of Transmitting Antenna Selection (TAS) is possible on any link. Here, the variation of SER (Symbol Error Rate) is determined against mean SNR (Signal-to-Noise Ratio) of R-D link for three different modulation schemes: BPSK, 8-PSK and 16-PSK, taking the number of antennas and SNR of S-R link as parameters under Nakagami -m fading condition.
Maps of unfixed genus and blossoming trees
Creators: name: Fusy, Éric
name: Guitter, Emmanuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce bijections between families of rooted maps with unfixed genus and families of so-called blossoming trees endowed with an arbitrary forward matching of their leaves. We first focus on Eulerian maps with controlled vertex degrees. The mapping from blossoming trees to maps is a generalization to unfixed genus of Schaeffer's closing construction for planar Eulerian maps. The inverse mapping relies on the existence of canonical orientations which allow to equip the maps with canonical spanning trees, as proved by Bernardi. Our bijection gives in particular (here in the Eulerian case) a combinatorial explanation to the striking similarity between the (infinite) recursive system of equations which determines the partition function of maps with unfixed genus (as obtained via matrix models and orthogonal polynomials) and that determining the partition function of planar maps. All the functions in the recursive system get a combinatorial interpretation as generating functions for maps endowed with particular multiple markings of their edges. This allows us in particular to give a combinatorial proof of some differential identities satisfied by these functions. We also consider face-colored Eulerian maps with unfixed genus and derive some striking identities between their generating functions and those of properly weighted marked maps. The same methodology is then applied to deal with $m$-regular bipartite maps with unfixed genus, leading to similar results. The case of cubic maps is also briefly discussed.
description: 44 pages, 20 figures
Learning State-Dependent Losses for Inverse Dynamics Learning
Creators: name: Morse, Kristen
name: Das, Neha
name: Lin, Yixin
name: Wang, Austin S.
name: Rai, Akshara
name: Meier, Franziska
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Being able to quickly adapt to changes in dynamics is paramount in model-based control for object manipulation tasks. In order to influence fast adaptation of the inverse dynamics model's parameters, data efficiency is crucial. Given observed data, a key element to how an optimizer updates model parameters is the loss function. In this work, we propose to apply meta-learning to learn structured, state-dependent loss functions during a meta-training phase. We then replace standard losses with our learned losses during online adaptation tasks. We evaluate our proposed approach on inverse dynamics learning tasks, both in simulation and on real hardware data. In both settings, the structured and state-dependent learned losses improve online adaptation speed, when compared to standard, state-independent loss functions.
description: 9 pages, 8 figures, accepted to IROS 2020, * Kristen Morse and Neha Das had equal contribution
The independent associations of recorded crime and perceived safety with physical health in a nationally representative cross-sectional survey of men and women in New Zealand
Creators: name: Lovasi, Gina Schellenbaum
Publisher: name: Columbia University
Year: 2014
Subjects: Epidemiology
Public health

description: Objectives: We investigated associations of officially recorded crime and perceived neighbourhood safety with physical health, evaluating potential effect modification by gender. Setting: Nationally representative population-based survey in New Zealand. Participants: Individual-level data from 6995 New Zealand General Social Survey (2010–2011) participants with complete data on physical health status, perceived neighbourhood safety, sociodemographic characteristics and smoking. Crime rate for each participant's home census was estimated based on data from the New Zealand Police (2008–2010). Primary outcome measure: The Transformed Physical Composite Score from the SF-12, a physical health summary score based on self-report ranging from 0 to 100. Results: We used cluster robust multivariable regression models to examine the associations among neighbourhood crime rates, perceived neighbourhood safety and the physical health summary score. Crime rates predicted adults’ perception that it was unsafe to walk in their neighbourhood at night: for each additional crime per 100 000 residents adults were 1.9% more likely to perceive their neighbourhood as unsafe (95% CI 1.2% to 2.5%). While relatively uncommon, the rate of crime with a weapon strongly predicted perceived safety: for each additional crime per 100 000 residents in this category, adults were 12.9% more likely to report the neighbourhood as unsafe (95% CI 8.8% to 17.0%). Police-recorded violent and night crime rates were associated with worse physical health among women: for each additional crime per 100 000 residents in these category women had a 0.3 point lower physical health score (95% CIs −0.6 to −0.1 for violent crime and −0.5 to −0.1 for crime at night, gender interaction p values 0.08 and 0.01, respectively). Perceiving the neighbourhood as unsafe was independently associated with 1.0 point lower physical health score (95% CI −1.5 to −0.5). Conclusions: Gender may modify the associations of officially recorded crime rates with physical health. Perceived neighbourhood safety was independently associated with physical health.
Abundances in Stars with Debris Disks
Creators: name: Ritchey, Adam M.
name: Gonzalez, Guillermo
name: Stone, Myra
name: Wallerstein, George
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present preliminary results of a detailed chemical abundance analysis for a sample of solar-type stars known to exhibit excess infrared emission associated with dusty debris disks. Our sample of 28 stars was selected based on results from the Formation and Evolution of Planetary Systems (FEPS) Spitzer Legacy Program, for the purpose of investigating whether the stellar atmospheres have been polluted with planetary material, which could indicate that the metallicity enhancement in stars with planets is due to metal-rich infall in the later stages of star and planet formation. The preliminary results presented here consist of precise abundances for 15 elements (C, O, Na, Mg, Al, Si, S, Ca, Sc, Ti, V, Cr, Fe, Co, and Ni) for half of the stars in our sample. We find that none of the stars investigated so far exhibit the expected trend of increasing elemental abundance with increasing condensation temperature, which would result from the stars having accreted planetary debris. Rather, the slopes of linear least-squares fits to the abundance data are either negative or consistent with zero. In both cases, our results may indicate that, like the Sun, the debris disk host stars are deficient in refractory elements, a possible signature of terrestrial and/or gas giant planet formation.
description: To be published in the proceedings of the IAU Symposium 299, Exploring the Formation and Evolution of Planetary Systems, B. Matthews & J. Graham, eds
Political Socialization in New Democracies Legacies of Repression and Pre-Democratic Partisanship
Creators: name: Anonymous
Publisher: name: Zenodo
Year: 2021

description: This project is the repression module of the Tunisia Post-2019 Election Survey, conducted on a nationally representative sample in Tunisia following the 2019 presidential and legislative elections. This is an anonymized version of the pre-analysis plan, last edited April 21, 2021, and registered with OSF on October 14, 2022.
The_Universal_Structure_of_National_Scientific_Development
Creators: name: MIAO, LILI
name: Murray, Dakota
name: Ahn, YY
Publisher: name: figshare
Year: 2021
Subjects: classificationCode: 461099
subject: Library and information studies not elsewhere classified
classificationCode: 461005
subject: Informetrics
classificationCode: 469999
subject: Other information and computing sciences not elsewhere classified
classificationCode: 461010
subject: Social and community informatics
classificationCode: 460207
subject: Modelling and simulation

description: Addition Data contains economic data from World Bank and other necessary data to reproduce results.
Raw Data contains countries' scientific publication record which is derived from Web of Science.
A low-loss photonic silica nanofiber for higher-order modes
Creators: name: Ravets, S.
name: Hoffman, J. E.
name: Orozco, L. A.
name: Rolston, S. L.
name: Beadie, G.
name: Fatemi, F. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Optical nanofibers confine light to subwavelength scales, and are of interest for the design, integration, and interconnection of nanophotonic devices. Here we demonstrate high transmission (> 97%) of the first family of excited modes through a 350 nm radius fiber, by appropriate choice of the fiber and precise control of the taper geometry. We can design the nanofibers so that these modes propagate with most of their energy outside the waist region. We also present an optical setup for selectively launching these modes with less than 1% fundamental mode contamination. Our experimental results are in good agreement with simulations of the propagation. Multimode optical nanofibers expand the photonic toolbox, and may aid in the realization of a fully integrated nanoscale device for communication science, laser science or other sensing applications.
description: 12 pages, 5 figures, movies available online
Plan ahead: practical tools to make your data and software more FAIR
Creators: name: Plomp, Esther
name: Der Velden, Yasemin Turkyilmaz-Van
name: Kuzak, Mateusz
name: Verburg, Maaike
name: Hof, Cees
name: Veen, Lourens
name: Spaaks, Jurriaan
name: González, Jesus Garcia
name: Camphuijsen, Jaro
name: Ferguson, Kim
Publisher: name: Zenodo
Year: 2022
Subjects: Research Data Management
FAIR
FAIR principles
Data Management Plan
DMP
Data Stewardship
Data Repository
Software
citation
licences

description: Research Data and Research Software Management (RDM) is beneficial for quality of scientific practice, can be time and cost-efficient, and provides recognition for all research outputs. It is therefore important to familiarise yourself with information and tools that are available to manage your data during various stages of your research. In this workshop, you will be introduced to RDM concepts, such as the FAIR data principles, data archiving, software licensing and citation. This will be followed by a hands-on experience with various platforms, tools and solutions (FAIR-Aware assessment tool, research software licenses and citation). Workshop given for the NWO BioPhysics 2022 conference on 10 October. Workshop Organisers: Esther Plomp, TU Delft, Data Steward, [Link].
 Mateusz Kuzak, the Netherlands eScience Center, Community Manager, [Link]
 Lourens Veen, the Netherlands eScience Center, Research Software Engineer, [Link]
 Jaro Camphuijsen, the Netherlands eScience Center, Research Software Engineer, [Link]
 Kim Ferguson, DANS-KNAW, Research Data Management Specialist, [Link]
Maximizing Energy-Efficiency in Multi-Relay OFDMA Cellular Networks
Creators: name: Cheung, Kent Tsz Kan
name: Yang, Shaoshi
name: Hanzo, Lajos
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This contribution presents a method of obtaining the optimal power and subcarrier allocations that maximize the energy-efficiency (EE) of a multi-user, multi-relay, orthogonal frequency division multiple access (OFDMA) cellular network. Initially, the objective function (OF) is formulated as the ratio of the spectral-efficiency (SE) over the power consumption of the network. This OF is shown to be quasi-concave, thus Dinkelbach's method can be employed for solving it as a series of parameterized concave problems. We characterize the performance of the aforementioned method by comparing the optimal solutions obtained to those found using an exhaustive search. Additionally, we explore the relationship between the achievable SE and EE in the cellular network upon increasing the number of active users. In general, increasing the number of users supported by the system benefits both the SE and EE, and higher SE values may be obtained at the cost of EE, when an increased power may be allocated.
description: 6 pages, 5 figures, 1 table, to appear in Proc. IEEE 2013 56th Global Communications Conference (GLOBECOM 2013), Atlanta, USA, December, 2013
Plan ahead: practical tools to make your data and software more FAIR
Creators: name: Plomp, Esther
name: Der Velden, Yasemin Turkyilmaz-Van
name: Kuzak, Mateusz
name: Verburg, Maaike
name: Hof, Cees
name: Veen, Lourens
name: Spaaks, Jurriaan
Publisher: name: Zenodo
Year: 2021
Subjects: Research Data Management
FAIR
FAIR principles
Data Management Plan
DMP
Data Stewardship
Data Repository
Software
citation
licences

description: Research Data and Research Software Management (RDM) is beneficial for quality of scientific practice, can be time and cost-efficient, and provides recognition for all research outputs. It is therefore important to familiarise yourself with information and tools that are available to manage your data during various stages of your research. In this workshop, you will be introduced to RDM concepts, such as FAIR principles, Data Management Plans (DMP), data archiving, software licensing and citation. This will be followed by a hands-on experience with various platforms, tools and solutions (Data Repositories, DMPonline, FAIR assessment tool, research software licenses and citation). Workshop given for the NWOlife2021 conference on the 27th of May on Zoom. Workshop Organisers: Esther Plomp, TU Delft, Data Steward, [Link].
 Yasemin Turkyilmaz - van der Velden, TU Delft, Data Steward, [Link].
 Mateusz Kuzak, the Netherlands eScience Center, Community Manager, [Link]
 Lourens Veen, the Netherlands eScience Center, Research Software Engineer, [Link]
 Jurriaan Spaaks, the Netherlands eScience Center, Research Software Engineer, [Link]
 Cees Hof, DANS, Trainer Research Data Management, [Link]
 Maaike Verburg, DANS, Research Data Expert, [Link]
Uncertainty-Aware Consistency Regularization for Cross-Domain Semantic Segmentation
Creators: name: Zhou, Qianyu
name: Feng, Zhengyang
name: Gu, Qiqi
name: Cheng, Guangliang
name: Lu, Xuequan
name: Shi, Jianping
name: Ma, Lizhuang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Unsupervised domain adaptation (UDA) aims to adapt existing models of the source domain to a new target domain with only unlabeled data. Most existing methods suffer from noticeable negative transfer resulting from either the error-prone discriminator network or the unreasonable teacher model. Besides, the local regional consistency in UDA has been largely neglected, and only extracting the global-level pattern information is not powerful enough for feature alignment due to the abuse use of contexts. To this end, we propose an uncertainty-aware consistency regularization method for cross-domain semantic segmentation. Firstly, we introduce an uncertainty-guided consistency loss with a dynamic weighting scheme by exploiting the latent uncertainty information of the target samples. As such, more meaningful and reliable knowledge from the teacher model can be transferred to the student model. We further reveal the reason why the current consistency regularization is often unstable in minimizing the domain discrepancy. Besides, we design a ClassDrop mask generation algorithm to produce strong class-wise perturbations. Guided by this mask, we propose a ClassOut strategy to realize effective regional consistency in a fine-grained manner. Experiments demonstrate that our method outperforms the state-of-the-art methods on four domain adaptation benchmarks, i.e., GTAV $\rightarrow $ Cityscapes and SYNTHIA $\rightarrow $ Cityscapes, Virtual KITTI $\rightarrow$ KITTI and Cityscapes $\rightarrow$ KITTI.
Plan ahead: practical tools to make your data and software more FAIR
Creators: name: Plomp, Esther
name: Der Velden, Yasemin Turkyilmaz-Van
name: Kuzak, Mateusz
name: Verburg, Maaike
name: Hof, Cees
name: Veen, Lourens
name: Spaaks, Jurriaan
name: González, Jesus Garcia
Publisher: name: Zenodo
Year: 2022
Subjects: Research Data Management
FAIR
FAIR principles
Data Management Plan
DMP
Data Stewardship
Data Repository
Software
citation
licences

description: Research Data and Research Software Management (RDM) is beneficial for quality of scientific practice, can be time and cost-efficient, and provides recognition for all research outputs. It is therefore important to familiarise yourself with information and tools that are available to manage your data during various stages of your research. In this workshop, you will be introduced to RDM concepts, such as the FAIR data principles, data archiving, software licensing and citation. This will be followed by a hands-on experience with various platforms, tools and solutions (Data Repositories, FAIR assessment tool, research software licenses and citation). Workshop given for the NWOlife2022 conference on the 25th of May Workshop Organisers: Esther Plomp, TU Delft, Data Steward, [Link].
 Mateusz Kuzak, the Netherlands eScience Center, Community Manager, [Link]
 Lourens Veen, the Netherlands eScience Center, Research Software Engineer, [Link]
 Jesus Garcia Gonzalez, the Netherlands eScience Center, Research Software Engineer, [Link]
 Cees Hof, DANS, Trainer Research Data Management, [Link]
 Maaike Verburg, DANS, Research Data Expert, [Link]
Review Essay: Giovambattista Giraldi Cinzio, Ed. Laura Benedetti, Giuseppe Monorchio, Enrico Musacchio, Discorsi dei romanzi
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2004
Subjects: Literature

description: Review of Discorsi dei romanzi by Giovambattista Giraldi Cinzio, Ed. Laura Benedetti, Giuseppe Monorchio, Enrico Musacchio
Continuous-mixture Autoregressive Networks for efficient variational calculation of many-body systems
Creators: name: Wang, Lingxiao
name: Jiang, Yin
name: He, Lianyi
name: Zhou, Kai
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop deep autoregressive networks with multi channels to compute many-body systems with \emph{continuous} spin degrees of freedom directly. As a concrete example, we embed the two-dimensional XY model into the continuous-mixture networks and rediscover the Kosterlitz-Thouless (KT) phase transition on a periodic square lattice. Vortices characterizing the quasi-long range order are accurately detected by the autoregressive neural networks. By learning the microscopic probability distributions from the macroscopic thermal distribution, the neural networks compute the free energy directly and find that free vortices and anti-vortices emerge in the high-temperature regime. As a more precise evaluation, we compute the helicity modulus to determine the KT transition temperature. Although the training process becomes more time-consuming with larger lattice sizes, the training time remains unchanged around the KT transition temperature. The continuous-mixture autoregressive networks we developed thus can be potentially used to study other many-body systems with continuous degrees of freedom.
description: rewrite the whole manuscript. 6 pages, 4 figures, comments welcome