cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Star Cluster System in the Nearby Starburst Galaxy M82
Creators: name: Lim, Sungsoon
name: Hwang, Narae
name: Lee, Myung Gyoon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a photometric study of star clusters in the nearby starburst galaxy M82 based on the UBVI, YJ and H band Hubble Space Telescope images. We find 1105 star clusters with V<23 mag. 1070 of them are located in the disk region, while 35 star clusters are in the halo region. The star clusters in the disk are composed of a dominant blue population with a color peak at (B-V)0 ~ 0.45, and a weaker red population. The luminosity function of the disk clusters shows a power-law distribution with a power law index alpha=-2.04+-0.03, and the scale height of their distribution is h_z=9".64+-0".40 (164 +- 7 pc), similar to that of the stellar thin disk of M82. We have derived the ages of ~630 star clusters using the spectral energy distribution fit method by comparing UBVI(YJ)H band photometric data with the simple stellar population models. The age distribution of the disk clusters shows that the most dominant cluster population has ages ranging from 100 Myr to 1 Gyr, with a peak at about 500 Myr. This suggests that M82 has undergone a disk-wide star formation about 500 Myr ago, probably through the interaction with M81. The brightest star clusters in the nuclear region are much brighter than those in other regions, indicating that more massive star clusters are formed in the denser environments. On the other hand, the colors of the halo clusters are similar to those of globular clusters in the Milky Way Galaxy, and their ages are estimated to be older than 1 Gyr. These are probably genuine old globular clusters in M82.
description: 48 pages, 20 figures, 2 tables; to appear in ApJ
French electoral surveys data harmonization based on DDI-L foundational constructs
Creators: name: Marie, Lucie
name: Jan, Malo
Publisher: name: Zenodo
Year: 2022

description: Since 2020, the CDSP has experimented with DDI-Lifecycle using Colectica to build a question and variable bank. A portal has been made publicly available (https://explore.cdsp.sciences-po.fr/). Maintaining efforts to further improve this tool, we currently explore DDI-L opportunities and Colectica Designer features to ease longitudinal data management. The presentation will demonstrate the value of ontologies to drive harmonization and to improve end-users (meta-)data exploration at the variable level. First, we present how we have harmonized historical electoral surveys data on France using ddi3.2 conceptual constructs. Second, we detail the outputs and benefits of this endeavor from the end-users point of view.
Landau-Zener dynamics of a nanoresonator containing a tunneling spin
Creators: name: O'Keeffe, Michael F.
name: Chudnovsky, Eugene M.
name: Garanin, Dmitry A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the Landau-Zener dynamics of a tunneling spin coupled to a torsional resonator. For strong spin-phonon coupling, when the oscillator frequency is large compared to the tunnel splitting, the system exhibits multiple Landau-Zener transitions. Entanglement of spin and mechanical angular momentum results in abrupt changes of oscillator dynamics which coincide in time with spin transitions. We show that a large number of spins on a single oscillator coupled only through the in-phase phonon field behaves as a single large spin, greatly enhancing the spin-phonon coupling. We compare purely quantum and semiclassical dynamics of the system and discuss their experimental realizations. An experiment is proposed in which the field sweep is used to read out the exact quantum state of the mechanical resonator.
description: 11 pages, 9 figures
Supplementary document for Plasmonic nanoresonator distributions for uniform energy deposition in active targets - 6087475.pdf
Creators: name: Csete, Mária
name: Vass, Dávid
name: Szenes, Andras
name: Tóth, Emese
name: Bánhelyi, Balázs
name: Papp, István
name: Bíró, Tamás
name: Csernai, László
name: Kroó, Norbert
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplemental document
Introduction to Sporadic Groups for physicists
Creators: name: Boya, Luis J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Group Theory (math.GR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We describe the collection of finite simple groups, with a view on physical applications. We recall first the prime cyclic groups $Z_p$, and the alternating groups $Alt_{n>4}$. After a quick revision of finite fields $\mathbb{F}_q$, $q = p^f$, with $p$ prime, we consider the 16 families of finite simple groups of Lie type. There are also 26 \emph{extra} "sporadic" groups, which gather in three interconnected "generations" (with 5+7+8 groups) plus the Pariah groups (6). We point out a couple of physical applications, including constructing the biggest sporadic group, the "Monster" group, with close to $10^{54}$ elements from arguments of physics, and also the relation of some Mathieu groups with compactification in string and M-theory.
description: This paper is published in: Journal of Physics A, (vol.) 46, (2013), as Topical Review
Deterministic Initialization of the K-Means Algorithm Using Hierarchical Clustering
Creators: name: Celebi, M. Emre
name: Kingravi, Hassan A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.5.3; H.2.8

description: K-means is undoubtedly the most widely used partitional clustering algorithm. Unfortunately, due to its gradient descent nature, this algorithm is highly sensitive to the initial placement of the cluster centers. Numerous initialization methods have been proposed to address this problem. Many of these methods, however, have superlinear complexity in the number of data points, making them impractical for large data sets. On the other hand, linear methods are often random and/or order-sensitive, which renders their results unrepeatable. Recently, Su and Dy proposed two highly successful hierarchical initialization methods named Var-Part and PCA-Part that are not only linear, but also deterministic (non-random) and order-invariant. In this paper, we propose a discriminant analysis based approach that addresses a common deficiency of these two methods. Experiments on a large and diverse collection of data sets from the UCI Machine Learning Repository demonstrate that Var-Part and PCA-Part are highly competitive with one of the best random initialization methods to date, i.e., k-means++, and that the proposed approach significantly improves the performance of both hierarchical methods.
description: 23 pages, 3 figures, 10 tables. arXiv admin note: substantial text overlap with arXiv:1209.1960
Dynamical entanglement entropy with angular momentum and U(1) charge
Creators: name: Caputa, Pawel
name: Mandal, Gautam
name: Sinha, Ritam
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider time-dependent entanglement entropy (EE) for a 1+1 dimensional CFT in the presence of angular momentum and U(1) charge. The EE saturates, irrespective of the initial state, to the grand canonical entropy after a time large compared with the length of the entangling interval. We reproduce the CFT results from an AdS dual consisting of a spinning BTZ black hole and a flat U(1) connection. The apparent discrepancy that the holographic EE does not a priori depend on the U(1) charge while the CFT EE does, is resolved by the charge-dependent shift between the bulk and boundary stress tensors. We show that for small entangling intervals, the entanglement entropy obeys the first law of thermodynamics, as conjectured recently. The saturation of the EE in the field theory is shown to follow from a version of quantum ergodicity; the derivation indicates that it should hold for conformal as well as massive theories in any number of dimensions.
description: 22 pages, 4 figures; (v2) many comments added for better clarity; typos fixed; references added
Biologically Unavoidable Sequences
Creators: name: Alexander, Samuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: 05C63, 92B10

description: A biologically unavoidable sequence is an infinite gender sequence which occurs in every gendered, infinite genealogical network satisfying certain tame conditions. We show that every eventually periodic sequence is biologically unavoidable (this generalizes Koenig's Lemma), and we exhibit some biologically avoidable sequences. Finally we give an application of unavoidable sequences to cellular automata.
description: 9 pages, 3 figures
Enlargement of Grains of Silica Colloidal Crystals by Centrifugation in an Inverted-Triangle Internal-Shaped Container
Creators: name: Hashimoto, Kaori
name: Mori, Atsushi
name: Tamura, Katsuhiro
name: Suzuki, Yoshihisa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We successfully fabricated large grains of silica colloidal crystals in an inverted-triangle internal-shaped container (inverted-triangle container) by centrifugation. The largest grain in the container was much larger than that in a container which has a flat bottom and constant width (flat-bottomed container). The edged bottom of the inverted-triangle container eliminated the number of the grains, and then the broadened shape of the container effectively widened the grains.
description: 10 pages, 4 figures; Japanese Journal of Applied Physics, accepted for publication
Crisis and Geopolitical Reordering: Covid-19 from a Comparative Perspective
Creators: name: Greco, Ettore
name: Marconi, Federica
name: Paviotti, Irene
Publisher: name: Zenodo
Year: 2023
Subjects: international order
globalisation
power shift
Covid-19
crisis

description: This paper aims to assess the impact of recent global crises on the system of international relations. In particular, it examines how the major shocks caused by these global crises have affected long-term trends and to what extent they have shaped the global order. The paper analyses four major global crises: the Covid-19 pandemic, the Global Financial Crisis (GFC), the Russian invasion of Ukraine and climate change. Two long-term global trends – global power shifts and globalisation – have been chosen as the axes around which the main geo-economic and geopolitical implications of these crises will be scrutinised.
 This analysis shows how each crisis has contributed to deepening trends that had already emerged from previous crises due to the persistence of unsolved issues or to the inadequacy of the efforts undertaken to address them. As a result of repeated and often mutually reinforcing global shocks, the world order is now characterised by high levels of uncertainty, fragility and unpredictability. This highlights the need for new cooperative approaches based on foresight and preparedness that aim at building more resilient political and socio-economic systems.
A Study of Migrants in Urban China Based on Unfinished Housing Projects
Creators: name: Luo, Miao
Publisher: name: Zenodo
Year: 2022

description: On the message board of the Renmin Website, a user expressed his/her feelings: "In order to cooperate with the government, we gave up the house we lived in for decades, the familiar environment, and the surrounding relatives and friends, planning to move to a different place. However, we end up wandering outside for many years and have nowhere to live or return to our hometown. There is only the unfinished building when we look around.”

 The real estate industry has boomed over the past few decades. As a result, there are always new residential buildings in the city. Yet, not all of these buildings were completed on schedule. Modern Chinese cities are littered with half-finished housing projects that were abandoned mid-construction. In-completion is such a vast and complex issue that the implications of those unfinished projects on the neighborhood where they are located - or even the entire city - are hard to be finalized because of the incompleteness and uncertainty.

 The unfinished houses are not only commercial residential projects with an average price of 20 million, a large number of them are resettlement houses built for relocating rural residents. With the acceleration of urbanization and the state's emphasis on the development of rural areas, many places started to demolish natural villages and built concentrated communities. In this way, the rural lands will be gradually back to the government for urban construction.

 Scattered unfinished resettlement communities not only change the urban landscape but also the everyday life of the residents. This study intends to study the unfinished housing projects of the floating population with a view to providing a complementary perspective that completes our view of immigration, belonging, and 'home'.
Temperature-dependent bulk viscosity of nitrogen gas determined from spontaneous Rayleigh-Brillouin scattering
Creators: name: Gu, Ziyu
name: Ubachs, Wim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Values for the bulk viscosity of molecular nitrogen gas (N2) were derived from spontaneous Rayleigh-Brillouin (RB) scattering at ultraviolet wavelengths (366.8 nm) and at a 90 degree scattering angle. Analysis of the scattering profiles yield values showing a linear increasing trend in the temperature interval from 255 K to 340 K. The present values, pertaining to hypersound acoustics at frequencies in the GHz domain, are found to be in agreement with results from acoustic attenuation experiments in N2 performed at MHz frequencies.
A importância da identificação e da diferenciação da Síndrome de Asperger e Transtorno do Espectro Autista.
Creators: name: Zotti, Maria Eduarda Gonzaga
name: Evangelista, Maria Eduarda Garcia
name: Ferreira, Matheus Félix Costa
name: Tentes, Vanessa
name: Neto, Joaquim
Publisher: name: figshare
Year: 2021
Subjects: Diseases

description: Resumo apresentado na Unidade Curricular de Iniciação Científica I do Centro Universitário Unieuro- Brasília-DF-1º semestre de 2021.
Soft Switching Multiple Model Predictive Control in Wind Energy Conversion Systems: Practical Evaluations
Creators: name: Mehdizadeh Gavgani, Babak
name: Farnam, Arash
name: De Kooning, Jeroen
name: Crevecoeur, Guillaume
Publisher: name: Zenodo
Year: 2022

description: Wind speed variation imposes a strong nonlinearity and uncertainties on the dynamical behaviour of the wind turbine. Despite the fast computational time of linear controllers, they may not provide a feasible performance for the whole operating range. To tackle these issues, the Soft Switching Multiple Model Predictive Controller (SSM-MPC) is proposed when considering multiple linear models around various operating points (MPPs) approximating the nonlinear dynamics. The gap metric method is used to assess how close different linear models are with respect to each other. The proposed controller performance is studied and compare with PI controller and bidirectional control strategy through experiments on a 7.5 kW wind turbine drivetrain.
IUSSP-CODATA FAIR Vocabularies Working Group
Creators: name: Alter, George
Publisher: name: Zenodo
Year: 2022

description: The FAIR Vocabularies for Population Research is a joint initiative between the International Union for the Scientific Study of Population (IUSSP) and CODATA, the Committee on Data of the International Science Council. Population research is an empirically focused field with a long tradition of widely shared, easily accessible data collections. The FAIR Principles point to ways that this tradition can be enhanced by taking advantage of emerging standards and technologies. The Working Group is focused on the development of FAIR vocabularies, guided by “Ten Simple Rules for making a vocabulary FAIR” developed by CODATA's FAIR Vocabularies Group. We are developing recommendations in three areas. First, what actions can IUSSP take to encourage FAIR data? For example, IUSSP can leverage existing resources (such as the online thesaurus Demopaedia) to assure that demographic terminology is accurately represented in FAIR thesauri and ontologies. Resources like the European Languages Social Science Thesaurus (ELSST) become more important in a world where data are linked through persistent identifiers. Second, we will make recommendations to the national and international statistical agencies relying on the Statistical Data and Metadata eXchange (SDMX) metadata standard to make their data more FAIR. SDMX developed to standardize exchanges between data producers and organizations like the UN, ILO, OECD, and World Bank. However, less consideration has been given to data dissemination. FAIR vocabularies will improve the harmonization and interoperability of data for researchers who need to combine data from multiple SDMX-based sources. Third, the Working Group is looking at recommendations for individual-level data described with DDI metadata. This world is much more decentralized than the official statistics community. Nevertheless, we believe development of FAIR vocabularies will lead to new uses of DDI metadata for data discovery, harmonization, and interoperability.
Ultra-stable implanted 83Rb/83mKr electron sources for the energy scale monitoring in the KATRIN experiment
Creators: name: Zbořil, M.
name: Bauer, S.
name: Beck, M.
name: Bonn, J.
name: Dragoun, O.
name: Jakůbek, J.
name: Johnston, K.
name: Kovalík, A.
name: Otten, E. W.
name: Schlösser, K.
name: Slezák, M.
name: Špalek, A.
name: Thümmler, T.
name: Vénos, D.
name: Žemlička, J.
name: Weinheimer, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The KATRIN experiment aims at the direct model-independent determination of the average electron neutrino mass via the measurement of the endpoint region of the tritium beta decay spectrum. The electron spectrometer of the MAC-E filter type is used, requiring very high stability of the electric filtering potential. This work proves the feasibility of implanted 83Rb/83mKr calibration electron sources which will be utilised in the additional monitor spectrometer sharing the high voltage with the main spectrometer of KATRIN. The source employs conversion electrons of 83mKr which is continuously generated by 83Rb. The K-32 conversion line (kinetic energy of 17.8 keV, natural line width of 2.7 eV) is shown to fulfill the KATRIN requirement of the relative energy stability of +/-1.6 ppm/month. The sources will serve as a standard tool for continuous monitoring of KATRIN's energy scale stability with sub-ppm precision. They may also be used in other applications where the precise conversion lines can be separated from the low energy spectrum caused by the electron inelastic scattering in the substrate.
description: 30 pages, 10 figures, 1 table, minor revision of the preprint, accepted by JINST on 5.2.2013
Pauli spin blockade and the ultrasmall magnetic field effect
Creators: name: Danon, Jeroen
name: Wang, Xuhui
name: Manchon, Aurélien
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Based on the spin-blockade model for organic magnetoresistance we present an analytic expression for the polaron-bipolaron transition rate, taking into account the effective nuclear fields on the sites. We reveal the physics producing qualitatively different magnetoconductance line shapes as well as the ultrasmall magnetic field effect, and we study the role of the ratio between the intersite hopping rate and the typical magnitude of the nuclear fields. Our findings are in agreement with recent experiments and numerical simulations.
description: 4+ pages, 3 figures
Effects of non-equilibrium noise on a quantum memory encoded in Majorana zero modes
Creators: name: Konschelle, François
name: Hassler, Fabian
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: In order to increase the coherence time of topological quantum memories in systems with Majorana zero modes, it has recently been proposed to encode the logical qubit states in non-local Majorana operators which are immune to localized excitations involving the unpaired Majorana modes. In this encoding, a logical error only happens when the quasi-particles, subsequent to their excitation, travel a distance of the order of the spacing between the Majorana modes. Here, we study the decay time of a quantum memory encoded in a clean topological nanowire interacting with an environment with a particular emphasis on the propagation of the quasi-particles above the gap. We show that the non-local encoding does not provide a significantly longer coherence time than the local encoding. In particular, the characteristic speed of propagation is of the order of the Fermi velocity of the nanowire and not given by the much slower group velocity of quasi-particles which are excited just above the gap.
description: 14 pages, 9 figures
Heavy quark spin selection rules in meson-antimeson states
Creators: name: Liu, Yan-Rui
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the heavy quark limit, we discuss the spin of the charm-anticharm pair $J_{c\bar{c}}$ in an S-wave meson-antimeson molecule or resonance. One finds two cases that $J_{c\bar{c}}$ cannot be 0: (a) $J=|j_2-j_4|-1$ or $J=j_2+j_4+1$ where $J$ is the total spin of the system and $j_2$ ($j_4$) is the total angular momentum of the light degree of freedom in a charmed meson (antimeson); (b) $J^C=1^+,2^-,3^+,...$, if the two different mesons belong to the same doublet. The decays to spin-singlet charmonium states are suppressed when one of the two conditions is satisfied. We discuss constrained decay properties for selected systems.
description: 9 pages, 1 table. Comments and suggestions are welcome
Precision test of the muon-Higgs coupling at a high-energy muon collider
Creators: name: Reuter, Jürgen
name: Han, Tao
name: Kilian, Wolfgang
name: Kreher, Nils
name: Ma, Yang
name: Striegl, Tobias
name: Xie, Keping
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: muon, storage ring
interaction, Yukawa
fermion, mass generation
scale, new physics
coupling, Yukawa
boson, production
TeV
sensitivity
precision measurement

description: We explore the sensitivity of directly testing the muon-Higgs coupling at a high-energy muon collider. This is strongly motivated if there exists new physics that is not aligned with the Standard Model Yukawa interactions which are responsible for the fermion mass generation. We illustrate a few such examples for physics beyond the Standard Model. With the accidentally small value of the muon Yukawa coupling and its subtle role in the high-energy production of multiple (vector and Higgs) bosons, we show that it is possible to measure the muon-Higgs coupling to an accuracy of ten percent for a 10 TeV muon collider and a few percent for a 30 TeV machine by utilizing the three boson production, potentially sensitive to a new physics scale about $\Lambda \sim$ 30-100 TeV.
The Scale-Invariant NMSSM and the 126 GeV Higgs Boson
Creators: name: Gherghetta, Tony
name: von Harling, Benedict
name: Medina, Anibal D.
name: Schmidt, Michael A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recent LHC discovery of a Higgs-like resonance at 126 GeV suggests that the minimal supersymmetric standard model must be modified in order to preserve naturalness. A simple extension is to include a singlet superfield and consider the scale-invariant NMSSM, whose renormalizable superpotential contains no dimensionful parameters. This extension not only solves the μ-problem, but can easily accommodate a 126 GeV Higgs. We study the naturalness of the scale-invariant NMSSM taking into account the recent constraints from LHC searches, flavor physics and electroweak precision tests. We show that TeV-scale stop masses are still allowed in much of the parameter space with 5% tuning for a low messenger scale of 20 TeV, split families (with third-generation sleptons decoupled) and Higgs-singlet coupling λof order one. For larger values of the Higgs-singlet coupling, which can relieve the tuning in the Higgs VEV, an additional tuning in the Higgs mass limits increasing the (lightest) stop mass beyond 1.2 TeV, the gluino mass above 3 TeV, and electroweak charginos and neutralinos beyond 400 GeV for a combined tuning better than 5%. This implies that the natural region of parameter space for the scale-invariant NMSSM will be fully explored at the 14 TeV LHC.
description: 35 pages, 8 figures; v2: references added, version published in JHEP
Comparison between accretion-related properties of Herbig Ae/Be and T Tauri stars
Creators: name: Mendigutía, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper summarizes several results concerning the comparison between accretion-related properties of cool (T Tauri; T < 7000 K, M < 1 Msun and hot (Herbig Ae/Be; 7000 < T(K) < 13000; 1 < M(Msun) < 6) pre-main sequence (PMS) stars. This comparison gives insight into the analogies/differences in the physics of the star-disk interaction and in the physical mechanisms driving disk dissipation. Several optical and near-IR line luminosities used for low-mass objects are also valid to estimate typical accretion rates for intermediate-mass stars under similar empirical expressions. In contrast, the Halpha width at 10% of peak intensity is used as an accretion tracer for T Tauris, but is not reliable to estimate accretion rates for Herbig Ae/Bes. This can be explained as a consequence of the different stellar rotation rates that characterize both types of stars. In addition, there are similar trends when the accretion rate is related to the near-IR colours and disk masses, suggesting that viscous accretion disk models are able to explain these trends for both T Tauri and Herbig Ae/Be stars. However, there are two major differences between cool and hot PMS objects. First, the inner gas dissipation timescale, as estimated by relating the accretion rates and the stellar ages, is slightly faster for Herbig Ae/Be stars. This could have implications on the physical mechanism able to form planets around objects more massive than the Sun. Second, the relative position of Herbig Ae/Bes with disks showing signs of inner dust clearing in the accretion rate--disk mass plane contrasts with that of transitional T Tauri stars, when both samples are compared with "classical", non-evolved disks. This latter difference could be pointing to a different physical mechanism driving disk evolution, depending on the stellar regime.
description: Proceding article of the CoolStars 17 conference (June 2012, Barcelona). Published in Astronomische Nachrichten
The Differential of All Two-Loop MHV Amplitudes in N=4 Yang-Mills Theory
Creators: name: Golden, John
name: Spradlin, Marcus
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an explicit analytic calculation of the differential of the planar n-particle, two-loop MHV scattering amplitude in N=4 super Yang-Mills theory. The result is expressed only in terms of the polylogarithm functions Li_k(-x), for k=1,2,3, with arguments x belonging to the special class of dual conformal cross-ratios known as cluster X-coordinates. The surprising fact that these amplitudes may be expressed in this way provides a striking example of the manner in which the cluster structure on the kinematic configuration space underlies the structure of amplitudes in SYM theory.
description: 10 pages. v2: typos corrected, some formulas replaced with more concise versions. v3: discussion of parity added, other minor additions based on JHEP reviewer comments
Global Wellposeness for the 3D inhomogeneous incompressible Navier-Stokes equations
Creators: name: Craig, Walter
name: Huang, Xiangdi
name: Wang, Yun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35, 35B65, 76N10

description: This paper addresses the three-dimensional Navier-Stokes equations for an incompressible fluid whose density is permitted to be inhomogeneous. We establish a theorem of global existence and uniqueness of strong solutions for initial data with small $\dot{H}^{\frac12}$-norm, which also satisfies a natural compatibility condition. A key point of the theorem is that the initial density need not be strictly positive.
description: 15 pages
Factorisation of two-variable p-adic L-functions
Creators: name: Lei, Antonio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let $f$ be a modular form which is non-ordinary at $p$. Kim and Loeffler have recently constructed two-variable $p$-adic $L$-functions associated to $f$. In the case where $a_p=0$, they showed that, as in the one-variable case, Pollack's plus and minus splitting applies to these new objects. In this short note, we show that such a splitting can be generalised to the case where $a_p\ne0$ using Sprung's logarithmic matrix.
description: 6 pages
Suzaku View of the Swift/BAT Active Galactic Nuclei. V. Torus Structure of Two Luminous Radio-loud AGNs (3C 206 and PKS 0707-35)
Creators: name: Tazaki, Fumie
name: Ueda, Yoshihiro
name: Terashima, Yuichi
name: Mushotzky, Richard
name: Tombesi, Francesco
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results from broad-band X-ray spectral analysis of 3C 206 and PKS 0707-35 with Suzaku and Swift/BAT, two of the most luminous unobscured and obscured radio-loud active galactic nuclei with hard X-ray luminosities of 10^{45.5} erg s^{-1} and 10^{44.9} erg s^{-1} (14--195 keV), respectively. Based on the radio core luminosity, we estimate that the X-ray spectrum of 3C 206 contains a significant (~ 60% in the 14--195 keV band) contribution from the jet, while it is negligible in PKS 0707-35. We can successfully model the spectra with the jet component (for 3C 206), the transmitted emission, and two reflection components from the torus and the accretion disk. The reflection strengths from the torus are found to be R_{torus} (= Ω/2π) = 0.29 +- 0.18 and 0.41 +- 0.18 for 3C 206 and PKS 0707-35, respectively, which are smaller than those in typical Seyfert galaxies. Utilizing the torus model by Ikeda et al. (2009), we quantify the relation between the half opening angle of a torus (θ_{oa}) and the equivalent width of an iron-K line. The observed equivalent width of 3C 206, < 71 eV, constrain the column density in the equatorial plane to N_{H}^{eq} < 10^{23} cm^{-2}, or the half opening angle to θ_{oa} > 80^\circ if N_{H}^{eq} = 10^{24} cm^{-2} is assumed. That of PKS 0707-35, 72 +- 36 eV, is consistent with N_{H}^{eq} ~ 10^{23} cm^{-2}. Our results suggest that the tori in luminous radio-loud AGNs are only poorly developed. The trend is similar to that seen in radio-quiet AGNs, implying that the torus structure is not different between AGNs with jets and without jets.
description: 12 pages, 8 figures, accepted for publication in the Astrophysical Journal
Time-dependent Dalitz-plot formalism for B_q -> J/ψ h+ h-
Creators: name: Zhang, Liming
name: Stone, Sheldon
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A formalism for measuring time-dependent CP violation in B_q -> J/ψh+ h- decays with J/ψ-> mu+ mu- is developed for the general case where there can be many h+ h- final states of different angular momentum present. Here h refers to any spinless meson. The decay amplitude is derived using similar considerations as those in a Daltiz like analysis of three-body spinless mesons taking into account the fact that the J/ψis spin-1, and the various interferences allowed between different final states. Implementation of this procedure can, in principle, lead to the use of a larger number of final states for CP violation studies.
description: To be published in Physics Lett. B, 11 pages 1 figure, version 2, fixed error in middle term of Eq. (23)
Orientation Determination in Single Particle X-ray Coherent Diffraction Imaging Experiments
Creators: name: Yefanov, O. M.
name: Vartanyants, I. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Single particle diffraction imaging experiments at free-electron lasers (FEL) have a great potential for structure determination of reproducible biological specimens that can not be crystallized. One of the challenges in processing the data from such an experiment is to determine correct orientation of each diffraction pattern from samples randomly injected in the FEL beam. We propose an algorithm (see also O. Yefanov et al., Photon Science - HASYLAB Annual Report 2010) that can solve this problem and can be applied to samples from tens of nanometers to microns in size, measured with sub-nanometer resolution in the presence of noise. This is achieved by the simultaneous analysis of a large number of diffraction patterns corresponding to different orientations of the particles. The algorithms efficiency is demonstrated for two biological samples, an artificial protein structure without any symmetry and a virus with icosahedral symmetry. Both structures are few tens of nanometers in size and consist of more than 100 000 non-hydrogen atoms. More than 10 000 diffraction patterns with Poisson noise were simulated and analyzed for each structure. Our simulations indicate the possibility to achieve resolution of about 3.3 Å at 3 Å wavelength and incoming flux of 10^{12} photons per pulse focused to 100\times 100 nm^2.
description: 23 pages, 10 figures, 40 references
An Overview of Verbal Morphology of Ihanzu (Bantu, Tanzania)
Creators: name: Beletskiy, Stanislav
Publisher: name: Zenodo
Year: 2022
Subjects: Languages of Tanzania
Tanzanian Rift Valley
Bantu
Ihanzu
Isanzu
tense-aspect-mood
verbal morphology
typology
narratives
language documentation

description: This study presents the outcomes of a short linguistic fieldwork on a Bantu lect Ihanzu (F31B) that is spoken in the north central Tanzania. According to the Ethnologue database Isanzu is a threatened language (6b) because of the relatively small number of speakers (26 000) and the low intergenerational transmission. Data collection aimed at basic description of phonetics and morphology. Method used to achieve this goal consists of translational elicitation of the 207-item Swadesh list, H. Batibo’s questionnaire on Bantu morphosyntax as well as of recording and transcribing narratives (fairy tales and “Pear story”). The analyses of data show that Isanzu possess typical for Eastern Bantu languages verbal morphology that includes the following slots (with encoding morphemes) within verbal phrase: 1) negation [sha/shanga]; 2) subject marker [n, u, o, k, m, a/e, noun class markers]; 3) tense-aspect-mood marker 1 [e ‘present’, a ‘past’, ka ‘narrative past’, o ‘future’]; 4) extension 1 [(k)i ‘reflexive/reciprocal’]; 5) object marker [ni, ko, mo, ke, wa, wa, nominal markers]; 6) root; 7) extension 2 [i ‘applicative’, w ‘passive’, z ‘causative’, ag ‘durative’, ek/ik ‘stative’]; 8) tense-aspect-mood marker 2 [ire ‘perfective’]; 9) final vowel [a ‘indicative’, e ‘subjunctive / optative / perfective’].
description: -Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. -Acknowledgement and citation: Beletskiy, Stanislav. 2022. An Overview of Verbal Morphology of Ihanzu (Bantu, Tanzania). Talk Given at Rift Valley Webinar Series 30/11/2022.
Floquet scattering matrix approach to the phase noise of a single-electron source in the adiabatic regime
Creators: name: Moskalets, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We give the basic elements of the Floquet scattering matrix approach to the dynamic quantum transport in mesoscopic and nanoscopic conductors. We use the scattering formalism to discuss the noise power spectrum of a single electron source working in the adiabatic regime and emitting particles into a chiral electron waveguide. The noise power is found to be quadratic at low frequencies and exponentially suppressed at high frequencies.
description: Submitted to the special issue on QUANTUM TRANSPORT BEYOND DC for the "journal of Computational Electronics"
title: An Exercise in Sitting with Discomfort (Summary Report)
title: Towards more equitable support for international relocation in North-South contexts
titleType: Subtitle
Creators: name: Yazaji, Rana
name: Schmidt, Marion
Publisher: name: ifa (Institut für Auslandsbeziehungen e.V.)
Year: 2023

description: Temporary international relocation initiatives (TIRIs) for artists and cultural workers are a form of international solidarity. Yet they are embedded in a context shaped by colonial history and global North-South power dynamics. In this report, the authors draw on the experiences of relocated artists as well as those of team members within TIRIs and host organisations to examine if TIRIs are currently equipped to identify power asymmetries, injustice, discrimination and racism at individual, institutional and structural levels and to effectively mitigate them. Finally, they develop holistic practical recommendations for greater equity and justice as well as an anti-racist approach for TIRIs and host organisations. This report addresses decision-makers and teams in TIRIs and host organisations, arts institutions, funders and policymakers. Both recognizing the existence of structural, systemic and individual injustice, racism and discrimination, and contributing to their eradication requires discomfort and constant self-reflection. Therefore, this report is an exercise in sitting with discomfort. The authors see this discomfort as a catalyst for change processes - an engine to sustain pressure to enact this change that cannot simply be dissolved by individual action. The full report can be downloaded here: https://doi.org/10.17901/akbp1.22.2022.
description: Martin Roth-Initiative Publication; 2022
Properties of Liquid Iron along the Melting Line up to the Earth-core Pressures
Creators: name: Fomin, Yu. D.
name: Ryzhov, V. N.
name: Brazhkin, V. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report a molecular dynamics study of transport coefficients and infinite frequency shear mod- ulus of liquid iron at high temperatures and high pressures. We observe a simultaneous rise of both shear viscosity and diffusion coefficient along the melting line and estimate if liquid iron can vitrify under Earth-core conditions. We show that in frames of the model studied in our work iron demonstrates a moderate increase of viscosity along the melting line. It is also demonstrated that in the limit of high temperatures and high pressures the liquid iron behaves similar to the soft spheres system with exponent n=4.6.
description: 6 pages, 3 figures
The past of a quantum particle
Creators: name: Vaidman, Lev
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Although there is no consensus regarding the "reality" of the past of a quantum particle, in situations where there is only one trajectory with nonvanishing quantum wave of the particle between its emission and detection points, it seems "safe" to associate the past of the particle with this trajectory. A method for analyzing the past of a quantum particle according to the weak trace it leaves is proposed. Such a trace can be observed via measurements performed on an ensemble of identically pre- and post-selected particles. Examples, in which this method contradicts the above common sense description of the past of the particle are presented. It is argued that it is possible to describe the past of a quantum particle, but the naive approach has to be replaced by both forward and backward evolving quantum states.
description: 7 pages, 5 figures, to be published in PRA
Circular Building: Environmentally and Financially Beneficial?
Creators: name: Van Gulck, Lisa
name: Steeman, Marijke
Publisher: name: Zenodo
Year: 2022

description: The goal of the circular building strategy is to have a lower environmental and financial impact than the traditional linear way of building. To prove this is in fact the case, it is necessary to be able to calculate the environmental and financial impact of circular versus linear building elements. The environmental impact of buildings, building elements and materials can be determined through Life Cycle Assessment (LCA) and the financial impact can be calculated through Life Cycle Costing (LCC). There are established standards in the building sector on how to execute LCA and LCC studies. However, currently many LCA and LCC studies based on these standards are not set up to evaluate circularity. On the one hand, circular principles are not evaluated. On the other hand, usually only one life cycle scenario and fixed parameter values are considered, while it is very difficult to predict what will happen over the long lifespan of a building element. Especially for circular building elements, which enable more scenarios (adaption, reuse, recycling,…) than linear ones. The goal of my PhD research is to develop an LCA and LCC method that can evaluate the environmental and financial impact of circular (versus linear) building elements. The focus lies on incorporating variable parameters and including multiple scenarios throughout the lifespan of a building element. An important research question is which of the parameters and scenarios are the most determining for the environmental and financial impact. These parameters will be important boundary conditions to ensure circular building is environmentally and financially more beneficial than linear building.
Brillouin Light Scattering Spectra as local Temperature Sensors for Thermal Magnons and Acoustic Phonons
Creators: name: Birt, Daniel R.
name: An, Kyongmo
name: Weathers, Annie
name: Shi, Li
name: Tsoi, Maxim
name: Li, Xiaoqin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate the use of the micro-Brillouin light scattering (micro-BLS) technique as a local temperature sensor for magnons in a Permalloy thin film and phonons in the glass substrate. A systematic shift in the frequencies of two thermally excited perpendicular standing spin wave modes as the film is uniformly heated allows us to achieve a temperature resolution better than 2.5 K. We demonstrate that the micro-BLS spectra can be used to measure the local temperatures of phonons and magnons across a thermal gradient. Such local temperature sensors are useful for investigating spin caloritronic and thermal transport phenomena in general.
description: 15 pages, 5 figures
Wolff's Problem of Ideals in the Multiplier Algebra on Dirichlet space
Creators: name: Banjade, Debendra P.
name: Trent, Tavan T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We establish an analogue of Wolff's theorem on ideals in $H^{\infty}(\mathbb{D})$ for the multiplier algebra of Dirichlet space.
Habitat formers in transitional waters- the odd tale of Ficopomatus enigmaticus (Fauvel, 1923) under the watchful gaze of the sorceress Circe (Sabaudia Lake, Latium coast-Italy)
Creators: name: Gaglioti, Martina
Publisher: name: figshare
Year: 2021
Subjects: subject: 60303 Biological Adaptation
subject: FOS: Biological sciences
subject: 60306 Evolutionary Impacts of Climate Change
subject: 60202 Community Ecology (excl. Invasive Species Ecology)

description: Ficopomatus enigmaticus (Fauvel, 1923) is a filter-feeding habitat former of the Serpulid Family. As many other invasive species his long-term establishment and its cosmopolitan habits made its real origin unclear. Comparisons with historical data revealed an overall decline of Ficopomatus populations especially in brackish waters and estuarine areas. These results highlight the need for a more detail monitoring activity at a local scale level, but it might hide also some intriguing secrets if considered from a conservation biology perspective and taking into account also the climatic variations occurring at a global scale. The most up to date works worldwide suggested that many episodic removals of the small Ficopomatus reefs yet occurred in the last few years, but the real causes of this events need to be further investigated to be really understood. This work is the result of a field observation occurred through expeditious methods in a transitional ecosystem of the Circeo Man and Biosphere Reserve.
Sex and Gender in Cardiac Resynchronization Therapy Cohort Studies: A Systematic Methodological Review and Meta-Analysis of Cohort Studies
Creators: name: Dewidar, Omar
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: Cardiac Resynchronization Therapy
Heart Failure
Sex
Gender
Observational studies
Health Equity

description: Randomized trials and cohort studies have shown sex differences in the implantation and response to Cardiac Resynchronization Therapy (CRT). Furthermore, gender roles are associated with precipitants of congestive heart failure. Cohort studies are well-suited to assessing implantation rates, long-term outcomes, and the role of sex and gender. Therefore, we systematically identified cohort studies that reported outcomes of CRT and evaluated the following: 1) prevalence and temporal changes in sex and gender reporting and analysis; and 2) sex differences in the implantation and response to CRT. Sex was increasingly considered but remained inadequately reported and analyzed. Gender was not considered in the studies. In clinical practice, fewer women received devices, despite benefiting from CRT more than men. Of note, the difference in response may be confounded by differences in the clinical profiles of men and women. There is a need for better integration of sex and gender in studies to understand better the reasons leading to the observed differences.