cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Transversity and Collins Fragmentation Functions: Towards a New Global Analysis
Creators: name: Anselmino, M.
name: Boglione, M.
name: D'Alesio, U.
name: Kotzinian, A.
name: Melis, S.
name: Murgia, F.
name: Prokudin, A.
name: Turk, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A new, preliminary global analysis of the experimental data on azimuthal asymmetries in SIDIS from HERMES and COMPASS collaborations, and in e+e- --> h_1 h_2 X processes from the BELLE collaboration, is performed. The new data allow for a more precise determination of the Collins fragmentation function and of the transversity distribution function for $u$ and $d$ quarks, in comparison with the results of our previous analysis. Estimates for the single spin asymmetry A_UT^{\sin(ϕ_h + ϕ_S)} at JLab and COMPASS, operating on a transversely polarized proton target, are presented.
description: 4 pages, 4 figures. To appear in the proceedings of the XVI International Workshop on Deep Inelastic Scattering and Related Subjects, DIS 2008, London, U.K., 7-11 April, 2008
Dieter Bingen u.a. (Hrsg.), Legitimation und Protest. Gesellschaftliche Unruhe in Polen, Ostdeutschland und anderen Transformationsländern nach 1989
Creators: name: Bonn, Lisa
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
Molecular properties of (U)LIRGs: CO, HCN, HNC and HCO+
Creators: name: Loenen, A. F.
name: Baan, W. A.
name: Spaans, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The observed molecular properties of a sample of FIR-luminous and OH megamaser (OH-MM) galaxies have been investigated. The ratio of high and low-density tracer lines is found to be determined by the progression of the star formation in the system. The HCO+/HCN and HCO+/HNC line ratios are good proxies for the density of the gas, and PDR and XDR sources can be distinguished using the HNC/HCN line ratio. The properties of the OH-MM sources in the sample can be explained by PDR chemistry in gas with densities higher than 10^5.5 cm^-3, confirming the classical OH-MM model of IR pumped amplification with (variable) low gains.
description: 5 pages, 2 figures, to appear in: IAU Symposium 242 Astrophysical Masers and their Environments
Alexander Friedman, Deutschlandbilder in der weißrussischen sowjetischen Gesellschaft 1919-1941. Propaganda und Erfahrungen
Creators: name: Einax, Rayk
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
Su una curiosa analogia tra il concetto di Geist in  Scheler e il concetto di Entlastung in Gehlen
Creators: name: Caffieri Valentina
Publisher: name: Zenodo
Year: 2019
Subjects: geist
Entlastung
Gehlen
Scheler
philosophy

description: Obiettivo di questo scritto è tracciare alcune analogie e alcune differenze fra due autori che sono stati alle origini dell'antropologia filosofia nel Novecento, Arnold Gehlen (1904-1976) e Max Scheler (1874-1928). Nel testo vengono indicate le differenti conclusioni a cui gli autori approdano e il differente modo di intendere le categorie interpretative dell'uomo, nonostante entrambi muovano dalla necessità di considerare l'uomo come una unità psicofisica e non come un essere scomposto in due differenti parti, quella fisica e quella spirituale.
Influence of friction on granular segregation
Creators: name: Ulrich, Stephan
name: Schröter, Matthias
name: Swinney, Harry L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Vertical shaking of a mixture of small and large beads can lead to segregation where the large beads either accumulate at the top of the sample, the so called Brazil Nut effect (BNE), or at the bottom, the Reverse Brazil Nut effect (RBNE). Here we demonstrate experimentally a sharp transition from the RBNE to the BNE when the particle coefficient of friction increases due to aging of the particles. This result can be explained by the two competing mechanisms of buoyancy and sidewall-driven convection, where the latter is assumed to grow in strength with increasing friction.
description: 3 pages, 2 figures
Marco De Marinis, Il teatro dopo l'età d'oro. Novecento e oltre, Roma, Bulzoni Editore, 2013, pp. 416, ISBN 978-88-7870-887-7
Creators: name: Liotta, Giuseppe
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2014

description: Annali Online  Lettere - Ferrara, IX 1 (2014)
Grasshoppers: Their Habits and Damage
Creators: name: Parker, J. R.
name: Connin, R. V
name: Parker, J. R.
name: Connin, R. V
Publisher: name: Unknown
Year: 1964
Subjects: Crop Production/Industries

description: Excerpt from the report: This bulletin on grasshoppers is intended to help county agricultural agents, entomologists, and other agricultural leaders. It presents in everyday language the more important facts about grasshoppers. It describes the damage they do; it tells what different species look like, how they develop, and where and how they live; and it explains how outbreaks occur. This information can be useful in controlling the pests.
La tessera mancante
Creators: name: Longoni †, Franco
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2014
Subjects: Gulu Real Art Studio; Martina Bacigalupo; installazioni; arte contemporanea

description: Some reflections about the exhibition Gulu Real Art Studio, by Martina Bacigalupo (Walther Collection, New York September 2013).
description: Annali Online  Lettere - Ferrara, IX 1 (2014)
Einleitung: Nationalisierung und Pragmatismus. Staatliche Institutionen und Minderheiten in Polen 1918-1939
Creators: name: Henschel, Christhardt
name: Stach, Stephan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 2 (2013): Nationalisierung und Pragmatismus. Staatliche Institutionen und Minderheiten in Polen 1918-1939
Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
Creators: name: Sousa, S. G.
name: Santos, N. C.
name: Mayor, M.
name: Udry, S.
name: Casagrande, L.
name: Israelian, G.
name: Pepe, F.
name: Queloz, D.
name: Monteiro, M. J. P. F. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To understand the formation and evolution of solar-type stars in the solar neighborhood, we need to measure their stellar parameters to high accuracy. We present a catalogue of accurate stellar parameters for 451 stars that represent the HARPS Guaranteed Time Observations (GTO) ``high precision'' sample. Spectroscopic stellar parameters were measured using high signal-to-noise (S/N) spectra acquired with the HARPS spectrograph. The spectroscopic analysis was completed assuming LTE with a grid of Kurucz atmosphere models and the recent ARES code for measuring line equivalent widths. We show that our results agree well with those ones presented in the literature (for stars in common). We present a useful calibration for the effective temperature as a function of the index color B-V and [Fe/H]. We use our results to study the metallicity-planet correlation, namely for very low mass planets. The results presented here suggest that in contrast to their jovian couterparts, Neptune-like planets do not form preferentially around metal-rich stars. The ratio of jupiter-to-neptunes is also an increasing function of stellar metallicity. These results are discussed in the context of the core-accretion model for planet formation.
description: 11 pages, 8 figures, accepted for publication in Astronomy & Astrophysics
Lattice exciton-polaron problem by quantum Monte Carlo simulations
Creators: name: Hohenadler, Martin
name: Littlewood, Peter B.
name: Fehske, Holger
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Exciton-polaron formation in one-dimensional lattice models with short or long-range carrier-phonon interaction is studied by quantum Monte Carlo simulations. Depending on the relative sign of electron and hole-phonon coupling, the exciton-polaron size increases or decreases with increasing interaction strength. Quantum phonon fluctuations determine the (exciton-)polaron size and yield translation-invariant states at all finite couplings.
description: 5 pages, 5 figures
Virtual Hadronic Corrections to Massive Bhabha Scattering
Creators: name: Actis, Stefano
name: Gluza, Janusz
name: Riemann, Tord
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Virtual hadronic contributions to the Bhabha process at the NNLO level are discussed. They are substantial for predictions with per mil accuracy. The studies of heavy fermion and hadron corrections complete the calculation of Bhabha virtual effects at the NNLO level.
description: 7 pages, 4 tables, 3 figures, contribution to proceedings of LL2008, to appear in NPB(PS)
Jerzy J. Kołacki, Bolesne punkty historii. Wypędzenia i wypędzeni w polskim piśmiennictwie naukowym w latach 1945-2005
Creators: name: Woniak, Katarzyna
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
The genetic and environmental basis for external colouration in lake whitefish (Coregonus clupeaformis (Mitchill)) from Southern Indian Lake, Manitoba
Creators: name: Johnston, Christine Helga
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to investigate the nature of the colour difference between light and dark-coloured whitefish from Southern Indian Lake, Manitoba and to examine related differences between them. Subjective assessment of whitefish colour is corroborated by quantifiable differences in melanophore numbers between the two forms. Spatial distribution of lights and darks differs both between and within regions. Lights occur throughout the lake, are slightly more abundant offshore than onshore and are primarily benthic in habit. Darks are restricted to certain areas of the lake, are more numerous onshore than offshore and are somewhat more pelagic than lights. The two forms showed significant differences in several morphometric characters and lower gill raker number, but not in hemoglobin or glycerol-3-phosphate dehydrogenase allele frequencies. Hatchery-reared offspring of dark parents had higher mean dorsal melanophore counts than offspring of light parents. The heritability estimate derived from the regression of offspring (age 111 days post-fertilization) on male parent melanophore count was 0.10. Short and long-term experiments showed that colour of larval whitefish is subject to environmental alteration in response to light conditions and background colour. Short-term change is effected through redistribution of melanin granules in the melanophores, long-term change through changes in numbers of melanophores. Level of infection with Triaenophorus crassus cysts is, on average, higher in darks than in lights. However, the mode for both forms is 0 indicating no direct causal connection between cyst count and pigmentation. Higher mean counts of darks may be related to diet and distribution. Morphometric and meristic characters are subject to. environmental modification, as shown by other studies. This plus the lack of difference between lights and darks in biochemical characteristics suggests no clear-cut separation between the two into non-interbreeding stocks. Whitefish colour is correlated with water colour and clarity and may be an adaptation for concealment.
Divergent four-point dynamic density correlation function of a glassy colloidal suspension: a diagrammatic approach
Creators: name: Szamel, Grzegorz
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We use a recently derived diagrammatic formulation of the dynamics of interacting Brownian particles [G. Szamel, J. Chem. Phys. 127, 084515 (2007)] to study a four-point dynamic density correlation function. We re-sum a class of diagrams which separate into two disconnected components upon cutting a single propagator. The resulting formula for the four-point correlation function can be expressed in terms of three-point functions closely related to the three-point susceptibility introduced by Biroli et al. [Phys. Rev. Lett. 97, 195701 (2006)] and the standard two-point correlation function. The four-point function has a structure very similar to that proposed by Berthier and collaborators [Science 310, 1797 (2005), J. Chem. Phys. 126, 184503 (2007)]. It exhibits a small wave vector divergence at the mode-coupling transition.
The Overdensity in Virgo, Sagittarius Debris, and the Asymmetric Spheroid
Creators: name: Newberg, Heidi Jo
name: Yanny, Brian
name: Cole, Nate
name: Beers, Timothy C.
name: Fiorentin, Paola Re
name: Schneider, Donald P.
name: Wilhelm, Ron
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the relationship between several previously identified Galactic halo stellar structures in the direction of Virgo using imaging and spectroscopic observations of F turnoff stars and blue horizontal branch stars from the Sloan Digital Sky Survey (SDSS) and the Sloan Extension for Galactic Understanding and Exploration (SEGUE). We show that the Sagittarius dwarf leading tidal tail does not pass through the solar neighborhood; it misses the Sun by more than 15 kpc, passing through the Galactic plane outside the Solar Circle. It also is not spatially coincident with the large stellar overdensity S297+63-20.5 in the Virgo constellation. S297+63-20.5 has a distinct turnoff color and kinematics. Faint (g ~ 20.3) turnoff stars in S297+63-20.5 have line-of-sight, Galactic standard of rest velocities V(GSR)= 130 +/- 10 km/s, opposite in sign to infalling Sgr tail stars. The path of the Sgr leading tidal tail is also inconsistent with the positions of some of the nearer stars with which it has been associated, and whose velocities have favored models with prolate Milky Way potentials. We additionally show that the number densities of brighter (g ~ 19.8) F turnoff stars are not symmetric about the Galactic center, and that this discrepancy is not primarily due to the S297+63-20.5 moving group. Either the spheroid is asymmetric about the Galactic center, or there are additional substructures that conspire to be on the same side of the Galaxy as S297+63-20.5. The S297+63-20.5 overdensity in Virgo is likely associated with two other previously identified Virgo substructures: the Virgo Stellar Stream (VSS) and the Virgo Overdensity (VOD). However, the velocity difference between the VSS and S297+63-20.5 and the difference in distance estimates between the VOD and S297+63-20.5 must be reconciled.
description: 10 figures, ApJ in press
Vorwort
Creators: name: Henschel, Christhardt
name: Stach, Stephan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 2 (2013): Nationalisierung und Pragmatismus. Staatliche Institutionen und Minderheiten in Polen 1918-1939
Multi-frequency high spectral resolution observations of HCN toward the circumstellar envelope of Y CVn
Creators: name: Fonfría, J. P.
name: Montiel, E. J.
name: Cernicharo, J.
name: DeWitt, C. N.
name: Richter, M. J.
name: Lacy, J. H.
name: Greathouse, T. K.
name: Santander-García, M.
name: Agúndez, M.
name: Massalkhi, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High spectral resolution observations toward the low mass-loss rate C-rich, J-type AGB star Y CVn have been carried out at 7.5, 13.1 and 14.0 um with SOFIA/EXES and IRTF/TEXES. Around 130 HCN and H13CN lines of bands v2, 2v2, 2v2-v2, 3v2-2v2, 3v2-v2, and 4v2-2v2 have been identified involving lower levels with energies up to ~3900 K. These lines have been complemented with the pure rotational lines J=1-0 and 3-2 of the vibrational states up to 2v2 acquired with the IRAM 30 m telescope, and with the continuum taken with ISO. We have analyzed the data with a ro-vibrational diagram and a code which models the absorption and emission of the circumstellar envelope of an AGB star. The continuum is produced by the star with a small contribution from dust grains comprising warm to hot SiC and cold amorphous carbon. The HCN abundance distribution seems to be anisotropic. The ejected gas is accelerated up to the terminal velocity (~8 km/s) from the photosphere to ~3R* but there is evidence of higher velocities (>9-10 km/s) beyond this region. In the vicinity of Y CVn, the line widths are as high as ~10 km/s, which implies a maximum turbulent velocity of 6 km/s or the existence of other physical mechanisms probably related to matter ejection that involve higher gas expansion velocities than expected. HCN is rotationally and vibrationally out of LTE throughout the whole envelope. A difference of about 1500 K in the rotational temperature at the photosphere is needed to explain the observations at 7.5 and 13-14 um. Our analysis finds a total HCN column density that ranges from ~2.1E+18 to 3.5E+18 cm^{-2}, an abundance with respect to H2 of 3.5E-05 to 1.3E-04, and a 12C/13C isotopic ratio of ~2.5 throughout the whole envelope.
description: 24 pages, 11 figures, 3 tables, accepted for publication in A&A
Dmitri Ginev (Hrsg.), Die Geisteswissenschaften im europäischen Diskurs. 2: Osteuropa
Creators: name: Rohrer, Wiebke
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
Helga Hirsch, Gehen oder Bleiben? Deutsche und polnische Juden in Schlesien und Pommern 1945-1957
Creators: name: Thum, Gregor
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
On the bound states of the Dirac equation in the extreme Kerr metric
Creators: name: Batic, Davide
name: Nowakowski, Marek
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the eigenvalues of the angular equation arising after the separation of the Dirac equation in the extreme Kerr metric. To this purpose a self-adjoint holomorphic operator family associated to this eigenvalue problem is considered. We show that the eigenvalues satisfy a first order nonlinear differential equation with respect to the black hole mass and we solve it. Finally, we prove that there exist no bound states for the Dirac equation in the aforementioned metric.
description: 13 pages
Raman imaging and electronic properties of graphene
Creators: name: Molitor, F.
name: Graf, D.
name: Stampfer, C.
name: Ihn, T.
name: Ensslin, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphite is a well-studied material with known electronic and optical properties. Graphene, on the other hand, which is just one layer of carbon atoms arranged in a hexagonal lattice, has been studied theoretically for quite some time but has only recently become accessible for experiments. Here we demonstrate how single- and multi-layer graphene can be unambiguously identified using Raman scattering. Furthermore, we use a scanning Raman set-up to image few-layer graphene flakes of various heights. In transport experiments we measure weak localization and conductance fluctuations in a graphene flake of about 7 monolayer thickness. We obtain a phase-coherence length of about 2 $μ$m at a temperature of 2 K. Furthermore we investigate the conductivity through single-layer graphene flakes and the tuning of electron and hole densities via a back gate.
Aradus flavicornis Dalman 1823
Creators: name: Heiss, Ernst
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Aradidae
Aradus
Aradus flavicornis

description: Aradus flavicornis Dalman, 1823
Aradus flavicornis Dalman, 1823: 88. ST(S): “ Sierra Leone ” [West Africa]; NHRS Aradus marani Hoberlandt 1957: 7 (synonymized by Kormilev, 1974: 60). HT ♀: Madagascar (Namoroka); ISMT; 1PT ♀: Madagascar (Reserve Vilanandro); NMPC; 1 PT ♀: Madagascar (Région du Sud, Pays Androy Imanombo); MNHN (coll. Alluaud).
Distr.: Africa, Madagascar, Southern Europe to Middle Asia.
Ref.: Kormilev, 1974 (Madagascar, Senegal, Cameroun); Linnavuori, 1978 (Sudan: Wau); Heiss, 1979 (redescr.); Kormilev & Froeschner, 1987 (cat.); Heiss & Péricart, 2007 (syn., morphology, distr., fig., 3 genitalia).
description: Published as part of Heiss, Ernst, 2012, Annotated catalogue of the flat bug family Aradidae Brullé, 1836 of Madagascar and adjacent islands (Hemiptera: Heteroptera), pp. 45-63 in Zootaxa 3426 (1) on page 48, DOI: 10.11646/zootaxa.3426.1.3, http://zenodo.org/record/214110
Wojciech Dudzik (Hrsg.), Theater-Bewusstsein. Polnisches Theater in der zweiten Hälfte des 20. Jahrhunderts. Ideen - Konzepte - Manifeste
Creators: name: Everding, Elżbieta
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 1 (2013)
Active cool stars and He I 10830 Å: the coronal connection
Creators: name: Sanz-Forcada, J.
name: Dupree, A. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The mechanism of formation of the He I 10830 A triplet in cool stars has been subject of debate for the last 30 years. A relation between the X-ray luminosity and the He I 10830 A flux was found in cool stars, but the dominant mechanism of formation in these stars (photoionization by coronal radiation followed by recombination and cascade, or collisional excitation in the chromosphere), has not yet been established. We use modern instrumentation (NOT/SOFIN) and a direct measurement of the EUV flux, which photoionizes He I, to investigate the formation mechanism of the line for the most active stars which are frequently excluded from analysis. We have observed with an unprecedented resolution (R~170,000) the He I 10830 A triplet in a set of 15 stars that were also observed with the Extreme Ultraviolet Explorer (EUVE) in order to compare the line strengths with their EUV and X-ray fluxes. Active dwarf and subgiant stars do not exhibit a relation between the EUV flux and the equivalent width of the He I 10830 A line. Giant stars however, show a positive correlation between the strength of the He I 10830 A absorption and the EUV and X-ray fluxes. The strength of the C IV 1550 A emission does not correlate with coronal fluxes in this sample of 15 stars. Active dwarf stars may have high chromospheric densities thus allowing collisional excitation to dominate photoionization/recombination processes in forming the He I 10830 A line. Active giant stars possess lower gravities, and lower chromospheric densities than dwarfs, allowing for photoexcitation processes to become important. Moreover, their extended chromospheres allowfor scattering of infrared continuum radiation, producing strong absorption in He I and tracing wind dynamics.
description: 9 pages, 12 figures. Accepted by A&A (June 2008)
Hedvig Ujvári (Hrsg.), Zwischen Bazar und Weltpolitik. Die Wiener Weltausstellung 1873 in Feuilletons von Max Nordau im Pester Lloyd
Creators: name: Kessler, Wolfgang
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
Towards a covariant model for cosmic self-acceleration
Creators: name: Koshelev, Alexey S.
name: Tomaras, Theodore N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An explicitly covariant formulation is presented of a modified DGP scenario proposed recently [1], to avoid the instability of the self-accelerating branch. It is based on the introduction of a bulk scalar field with appropriate non-minimal coupling to the bulk Einstein-Hilbert term. The method is general and may be applied to other models as well.
description: 10 pages, no figures; v2: version published in JHEP
title: Planting Trees with Digital Media: Reimagining Ecological Care
Creators: name: Desai, Shruti
Publisher: name: Goldsmiths, University of London
Year: 2019

description: In the last decade, planting trees through the internet, social media, and web and mobile applications has become popularised as a means to express care and consideration for the earth and distant others. The advent of digital tree planting coincides with the rise of environmental marketing and agendas for sustainable development that stress the good of trees for addressing environmental change, alongside swelling interest in everyday digital technologies and consumption as mediums for environmental action.

Against this backdrop, the thesis critiques how digital tree planting campaigns are promoting ecological care at a distance. It explores how such campaigns represent trees as valuable and situate them in relations of care for others and the environment. This critical exploration develops through an investigation of how particular uses of digital media technologies are framed as facilitating planting and care. Three empirical cases are chosen, which shed light on the three overarching digital strategies that companies and organisations are employing for this purpose: (i) online shopping; (ii) apps, games, and crowdfunding sites; and (iii) cryptocurrencies, credit cards, e-cards, and e-donations. A set of corresponding campaigns is analysed for each case using multimodal ecocritical discourse analysis, which attends to trees as subjects of environmental discourse and practice.

The resulting case discussions illustrate how the promotion of various kinds of digital consumption affects the kinds of relations with, and regard for, trees that can be imagined. In so doing, it is argued, the campaigns also draw selective lines of ecological connection between contributing individuals and distant others and environments, provoking productive questions about the terms of caring that are being forged.

Intellectually, the critique unfolds through a conversation between ecological ethics and media and cultural studies, and is variously inflected by environmental anthropology, critical studies in marketing and consumption, and geography.
A Data-Driven Biophysical Computational Model of Parkinson's Disease based on Marmoset Monkeys
Creators: name: Ranieri, Caetano M.
name: Pimentel, Jhielson M.
name: Romano, Marcelo R.
name: Elias, Leonardo A.
name: Romero, Roseli A. F.
name: Lones, Michael A.
name: Araujo, Mariana F. P.
name: Vargas, Patricia A.
name: Moioli, Renan C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: In this work we propose a new biophysical computational model of brain regions relevant to Parkinson's Disease based on local field potential data collected from the brain of marmoset monkeys. Parkinson's disease is a neurodegenerative disorder, linked to the death of dopaminergic neurons at the substantia nigra pars compacta, which affects the normal dynamics of the basal ganglia-thalamus-cortex neuronal circuit of the brain. Although there are multiple mechanisms underlying the disease, a complete description of those mechanisms and molecular pathogenesis are still missing, and there is still no cure. To address this gap, computational models that resemble neurobiological aspects found in animal models have been proposed. In our model, we performed a data-driven approach in which a set of biologically constrained parameters is optimised using differential evolution. Evolved models successfully resembled single-neuron mean firing rates and spectral signatures of local field potentials from healthy and parkinsonian marmoset brain data. As far as we are concerned, this is the first computational model of Parkinson's Disease based on simultaneous electrophysiological recordings from seven brain regions of Marmoset monkeys. Results show that the proposed model could facilitate the investigation of the mechanisms of PD and support the development of techniques that can indicate new therapies. It could also be applied to other computational neuroscience problems in which biological data could be used to fit multi-scale models of brain circuits.
Western hemlock foliar nutrients and terminal growth in relation to three contrasting forest floors within a stand
Creators: name: Inselberg, Alexander Eduard
Publisher: name: University of British Columbia
Year: 2010

description: The objective of this study is to determine whether or not foliar macro- and microelements and terminal growth are the same, within a stand for western hemlock (Tsuga heterophylla (Raf.) Sarg.) associated with three different forest floor sampling strata: 1) Orthihumimor, 2) thin forest floor, and 3) Lignohumimor. The study site is in the Wetter Maritime Coastal Western Hemlock (CWHb) biogeoclimatic subzone in the Seymour River watershed near Vancouver, British Columbia. The sample trees are natural regeneration established on sites not exposed to slash-burning, following a high-lead clearcut in 1972. Nutrient deficiency diagnosis, based on foliar analysis data, suggests a deficiency of P%, K%, and N% (in decreasing order of severity) in all three strata. Micronutrients of concern appear to be Fe and Cu in all the strata, and Zn for trees in the Lignohumimor stratum. Nitrogen fertilization might induce B deficiency on all strata. Manganese is the only micronutrient present in great excess. Terminal (leader) growth is greatest on Orthihumimors, intermediate on Lignohumimors and least on thin forest floors. A single factor ANOVA indicated differences at the 5% level for 7, and the 1% level for 6 of the 22 variables tested. Range tests were applied to determine between which of the 3 forest floor types the significant differences occurred. Backward stepwise multiple regression explained 88% of the variation in ln terminal growth on stratum 3, and 86% of the variation in terminal growth on stratum 2. Only 51% of the variation in ln terminal growth is explained by the multiple linear regression equation for stratum 1. The poor results for stratum 1 are attributed to a bimodal distribution of terminal growth. Six variables are included in the discriminant analysis of hemlock on the three forest floor strata. In the jackknifed classification procedure, 79% (or 45) of the 57 sample trees are correctly matched to their forest floor stratum. A correlation matrix of all variables versus each of the first three principal components analysis axes defines the variables, in the order of their importance, that contribute to the separation of the strata along the axes. When both nutrition and growth are considered, the statistics suggest that the Orthihumimor is the best of the 3 microsites for hemlock.
Mutual information for the selection of relevant variables in spectrometric nonlinear modelling
Creators: name: Rossi, Fabrice
name: Lendasse, Amaury
name: François, Damien
name: Wertz, Vincent
name: Verleysen, Michel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Data from spectrophotometers form vectors of a large number of exploitable variables. Building quantitative models using these variables most often requires using a smaller set of variables than the initial one. Indeed, a too large number of input variables to a model results in a too large number of parameters, leading to overfitting and poor generalization abilities. In this paper, we suggest the use of the mutual information measure to select variables from the initial set. The mutual information measures the information content in input variables with respect to the model output, without making any assumption on the model that will be used; it is thus suitable for nonlinear modelling. In addition, it leads to the selection of variables among the initial set, and not to linear or nonlinear combinations of them. Without decreasing the model performances compared to other variable projection methods, it allows therefore a greater interpretability of the results.
Alfred Schopf, A Voice from Bohemia. At the Same Time a Memorial to My Lost Home in Bohemia
Creators: name: Höhne, Steffen
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 1 (2013)
Explainable Multi-Stakeholder Job Recommender Systems
Creators: name: Schellingerhout, Roan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Public opinion on recommender systems has become increasingly wary in recent years. In line with this trend, lawmakers have also started to become more critical of such systems, resulting in the introduction of new laws focusing on aspects such as privacy, fairness, and explainability for recommender systems and AI at large. These concepts are especially crucial in high-risk domains such as recruitment. In recruitment specifically, decisions carry substantial weight, as the outcomes can significantly impact individuals' careers and companies' success. Additionally, there is a need for a multi-stakeholder approach, as these systems are used by job seekers, recruiters, and companies simultaneously, each with its own requirements and expectations. In this paper, I summarize my current research on the topic of explainable, multi-stakeholder job recommender systems and set out a number of future research directions.
description: 5 pages, 1 figure, to be published in ACM RecSys 2024
Towards Real-time Semantic RGB-D SLAM in Dynamic Environments
Creators: name: Ji, Tete
name: Wang, Chen
name: Xie, Lihua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Most of the existing visual SLAM methods heavily rely on a static world assumption and easily fail in dynamic environments. Some recent works eliminate the influence of dynamic objects by introducing deep learning-based semantic information to SLAM systems. However such methods suffer from high computational cost and cannot handle unknown objects. In this paper, we propose a real-time semantic RGB-D SLAM system for dynamic environments that is capable of detecting both known and unknown moving objects. To reduce the computational cost, we only perform semantic segmentation on keyframes to remove known dynamic objects, and maintain a static map for robust camera tracking. Furthermore, we propose an efficient geometry module to detect unknown moving objects by clustering the depth image into a few regions and identifying the dynamic regions via their reprojection errors. The proposed method is evaluated on public datasets and real-world conditions. To the best of our knowledge, it is one of the first semantic RGB-D SLAM systems that run in real-time on a low-power embedded platform and provide high localization accuracy in dynamic environments.
description: Accepted to the 2021 IEEE International Conference on Robotics and Automation (ICRA 2021)
Spatially inhomogeneous phase in the two-dimensional repulsive Hubbard model
Creators: name: Chang, Chia-Chen
name: Zhang, Shiwei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using recent advances in auxiliary-field quantum Monte Carlo techniques and the phaseless approximation to control the sign/phase problem, we determine the equation of state in the ground state of the two-dimensional repulsive single-band Hubbard model at intermediate interactions. Shell effects are eliminated and finite-size effects are greatly reduced by boundary condition integration. Spin-spin correlation functions and structure factors are also calculated. In lattice sizes up to $16\times 16$, the results show signal for phase-separation. Upon doping, the system separates into one phase of density $n=1$ (hole-free) and the other at density $n_c$ ($\sim 0.9$). The long-range antiferromagnetic order is coupled to this process, and is lost below $n_c$.
description: 5 pages, 5 figures. title changed, final version accepted for publication
Molecular gas and dust in Arp 94: The formation of a recycled galaxy in an interacting system
Creators: name: Lisenfeld, U.
name: Mundell, C. G.
name: Schinnerer, E.
name: Appleton, P. N.
name: Allsopp, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new results for the molecular gas, dust emission and the ionized gas in J1023+1952, an HI rich intergalactic star-forming tidal dwarf galaxy candidate. It is located at the projected intersection of two faint stellar tidal streams wrapped around the interacting pair of galaxies NGC 3227/6 (Arp~94). Using the IRAM 30m telescope, emission from CO(1-0) and CO(2-1) was detected across the entire extent of the neutral hydrogen cloud associated with J1023+1952, a region of the size of 8.9$ x 5.9 kpc, as well as in the nuclear region and outer disk of NGC 3227. The molecular gas is found to be abundant over the entire HI cloud, with H2-to-HI gas mass ratios between 0.5 and 1.7. New Spitzer mid-infrared observations at 3.6, 4.5, 5.8, 8.0, 15 and 24mu show that young SF is restricted to the southern part of the cloud. Despite the relatively uniform H$_2$ and HI column density across the cloud, young SF occurs only where the velocity dispersion in the CO and HI is a factor of $\sim$two lower (FWHM of 30 - 70 \kms) than elsewhere in the cloud (FWHM of 80 - 120 \kms). Thus the kinematics of the gas, in addition to its column density, seems to be a crucial factor in triggering SF. Optical/infrared spectral energy distributions (SEDs) and Halpha photometry confirm that all the knots are young, with a tentative age sequence from the south-west (oldest knots) to the north-east (youngest). Optical spectroscopy of the brightest SF region allowed us to determine the metallicity (12+log(O/H) = 8.6 +- 0.2) and the extinction ($A_B$=2.4). This shows that J1023+1952 is made from metal-enriched gas which is inconsistent with the hypothesis that it represents a pre-existing dwarf galaxy. Instead, it must be formed from recycled, metal-enrichd gas, expelled from NGC 3227 or NGC 3226 in a previous phase of the interaction.
description: accepted for publication in ApJ, 20 pages, 11 figures
Black Ring Deconstruction
Creators: name: Gimon, Eric G.
name: Levi, Thomas S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a sample microstate for a black ring in four and five dimensional language. The microstate consists of a black string microstate with an additional D6-brane. We show that with an appropriate choice of parameters the piece involving the black string microstate falls down a long AdS throat, whose M-theory lift is AdS_3 X S^2. We wrap a spinning dipole M2-brane on the S^2 in the probe approximation. In IIA, this corresponds to a dielectric D2-brane carrying only D0-charge. We conjecture this is the first approximation to a cloud of D0-branes blowing up due to their non-abelian degrees of freedom and the Myers effect.
description: 10 pages, 2 figures
Jiří Friedl (Hrsg.), Státní polityka vůči polské menšině na Těšínsku v letech 1945-1949. Výběrová edice dokumentu
Creators: name: Jaworski, Paweł
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
Circuit and Graver Walks and Linear and Integer Programming
Creators: name: Onn, Shmuel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optimization and Control (math.OC)
subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05A, 15A, 51M, 52A, 52B, 52C, 62H, 68Q, 68R, 68U, 68W, 90B, 90C

description: We show that a circuit walk from a given feasible point of a given linear program to an optimal point can be computed in polynomial time using only linear algebra operations and the solution of the single given linear program.
 We also show that a Graver walk from a given feasible point of a given integer program to an optimal point is polynomial time computable using an integer programming oracle, but without such an oracle, it is hard to compute such a walk even if an optimal solution to the given program is given as well.
 Combining our oracle algorithm with recent results on sparse integer programming, we also show that Graver walks from any point are polynomial time computable over matrices of bounded tree-depth and subdeterminants.
Monika Krupar, Tschechische juristische Zeitschriften des 19. und 20. Jahrhunderts
Creators: name: Bugge, Peter
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
A quintet of quandaries: five no-go theorems for Relational Quantum Mechanics
Creators: name: Pienaar, Jacques L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Relational quantum mechanics (RQM) proposes an ontology of relations between physical systems, where any system can serve as an `observer' and any physical interaction between systems counts as a `measurement'. Quantities take unique values spontaneously in these interactions, and the occurrence of such `quantum events' is strictly relative to the observing system, making them `relative facts'. The quantum state represents the objective information that one system has about another by virtue of correlations between their physical variables. The ontology of RQM thereby strives to uphold the universality and completeness of quantum theory, while at the same time maintaining that the actualization of each unique quantum event is a fundamental physical event. Can RQM sustain this precarious balancing act? Here we present five no-go theorems that imply it cannot; something has to give way.
description: 16 pages. Updated references, fixed typos. Companion to arXiv:2108.13977
Bulk antisymmetric tensor fields in a Randall-Sundrum model
Creators: name: Mukhopadhyaya, Biswarup
name: Sen, Somasri
name: SenGupta, Soumitra
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider bulk antisymmetric tensor fields of various ranks in a Randall-Sundrum scenario. We show that, rank-2 onwards, the zero-modes of the projections of these fields on the (3+1) dimensional visible brane become increasingly weaker as the rank of the tensor increases. All such tensor fields of rank 4 or more are absent from the dynamics in four dimensions. This leaves only the zero-mode graviton to have coupling $\sim 1/M_P$ with matter, thus explaining why the large-scale behaviour of the universe is governed by gravity only. We have also computed the masses of the heavier modes upto rank-3, and shown that they are relatively less likely to have detectable accelerator signals.
description: 8 Pages, Latex
Signatories of letter titled: Vaccine Equity Letter
Creators: name: van Schalkwyk, May
name: Körner, Katherine
name: Fagan, Lucy
name: Sinmyee, Smruti
name: Nacer, Hadjer
Publisher: name: figshare
Year: 2021
Subjects: Uncategorized

description: List of signatories 28th November 2021
Leading Singularities of the Two-Loop Six-Particle MHV Amplitude
Creators: name: Cachazo, Freddy
name: Spradlin, Marcus
name: Volovich, Anastasia
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the leading singularity technique to determine the planar six-particle two-loop MHV amplitude in N=4 super Yang-Mills in terms of a simple basis of integrals. Our result for the parity even part of the amplitude agrees with the one recently presented in arXiv:0803.1465. The parity-odd part of the amplitude is a new result. The leading singularity technique reduces the determination of the amplitude to finding the solution to a system of linear equations. The system of equations is easily found by computing residues. We present the complete system of equations which determines the whole amplitude, and solve the two-by-two blocks analytically. Larger blocks are solved numerically in order to test the ABDK/BDS iterative structure.
Cavity Enhanced Spin Measurement of an NV Centre in Diamond
Creators: name: Young, A.
name: Hu, C. Y.
name: Marseglia, L.
name: Harrison, J. P.
name: O'Brien, J. L.
name: Rarity, J. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a high efficiency high fidelity measurement of the ground state spin of a single NV center in diamond, using the effects of cavity quantum electrodynamics. The scheme we propose is based in the one dimensional atom or Purcell regime, removing the need for high Q cavities that are challenging to fabricate. The ground state of the NV center consists of three spin levels $^{3}A_{(m=0)}$ and $^{3}A_{(m=\pm1)}$ (the $\pm1$ states are near degenerate in zero field). These two states can undergo transitions to the excited ($^{3}E$) state, with an energy difference of $\approx7-10$ $μ$eV between the two. By choosing the correct Q factor, this small detuning between the two transitions results in a dramatic change in the intensity of reflected light. We show the change in reflected intensity can allow us to read out the ground state spin using a low intensity laser with an error rate of $\approx5.5\times10^{-3}$, when realistic cavity and experimental parameters are considered. Since very low levels of light are used to probe the state of the spin we limit the number of florescence cycles, thereby limiting the non spin preserving transitions through the intermediate singlet state $^{1}A$.