cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cosmological backreaction within the Szekeres model and emergence of spatial curvature
Creators: name: Bolejko, Krzysztof
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper discusses the phenomenon of backreaction within the Szekeres model. Cosmological backreaction describes how the mean global evolution of the Universe deviates from the Friedmannian evolution. The analysis is based on models of a single cosmological environment and the global ensemble of the Szekeres models (of the Swiss-Cheese-type and Styrofoam-type). The obtained results show that non-linear growth of cosmic structures is associated with the growth of the spatial curvature $Ω_{\cal R}$ (in the FLRW limit $Ω_{\cal R} \to Ω_k$). If averaged over global scales the result depends on the assumed global model of the Universe. Within the Swiss-Cheese model, which does have a fixed background, the volume average follows the evolution of the background, and the global spatial curvature averages out to zero (the background model is the $Λ$CDM model, which is spatially flat). In the Styrofoam-type model, which does not have a fixed background, the mean evolution deviates from the spatially flat $Λ$CDM model, and the mean spatial curvature evolves to from $Ω_{\cal R} =0 $ at the CMB to $Ω_{\cal R} \sim 0.1$ at $z =0$. If the Styrofoam-type model correctly captures evolutionary features of the real Universe then one should expect that in our Universe, the spatial curvature should build up (local growth of cosmic structures) and its mean global average should deviate from zero (backreaction). As a result, this paper predicts that the low-redshift Universe should not be spatially flat (i.e. $Ω_k \ne 0$, even if in the early Universe $Ω_k = 0$) and therefore when analysing low-$z$ cosmological data one should keep $Ω_k$ as a free parameter and independent from the CMB constraints.
description: 23 pages, 7 figures; v3 - matches published version
Letter from E.M. Forster to Alec Randall, April 28, 1932
Creators: name: Forster, E. M. (Edward Morgan), 1879-1970
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Randall, Alec, 1892-
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Diplomatic and consular service
valueUri: http://id.worldcat.org/fast/894202
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Ambassadors
valueUri: http://id.worldcat.org/fast/806713
subject: Diplomats
valueUri: http://id.worldcat.org/fast/894415
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Forster, E. M. (Edward Morgan), 1879-1970
valueUri: http://id.worldcat.org/fast/40913
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718

description: Part of a collection of letters written by E.M. Forster to Sir Alec Randall. They concern, firstly, his trip to Rumania, where he stayed with the Randalls; a tour in France in 1928; and his journey home. Later letters include references to such literary people as Herbert Read, Harold Monro and T.S. Eliot, plus a mention of reading James Joyce's "Ulysses". He also refers to his visit to Africa and his sentiments about the Spanish Civil War and W.W.II. Most of the later letters are signed "Morgan". E. M. Forster was born in London. He is principally known as a novelist and was associated with the Bloomsbury Group, which included Virginia Woolf. Among his best known works are "A Room With A View" (1911) and "A Passage To India" (1924). Many of his novels have been dramatized. He also wrote short stories, drama, non-fiction and criticism. He died at King's College, Cambridge, where he had resided since the mid 1940s. His friend, Sir Alec Randall was with the British legation in Bucharest, Rumania, and was later appointed to serve in Rome. Forster discusses his travel plans to Bucharest.
Revisiting the dilatation operator of the Wilson-Fisher fixed point
Creators: name: Liendo, Pedro
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit the order $\varepsilon$ dilatation operator of the Wilson-Fisher fixed point obtained by Kehrein, Pismak, and Wegner in light of recent results in conformal field theory. Our approach is algebraic and based only on symmetry principles. The starting point of our analysis is that the first correction to the dilatation operator is a conformal invariant, which implies that its form is fixed up to an infinite set of coefficients associated with the scaling dimensions of higher-spin currents. These coefficients can be fixed using well-known perturbative results, however, they were recently re-obtained using CFT arguments without relying on perturbation theory. Our analysis then implies that all order-$\varepsilon$ scaling dimensions of the Wilson-Fisher fixed point can be fixed by symmetry.
description: 23 pages, v2: typos corrected, references added
Quasar spectral variability from the XMM-Newton serendipitous source catalogue
Creators: name: Serafinelli, R.
name: Vagnetti, F.
name: Middei, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. X-ray spectral variability analyses of active galactic nuclei (AGN) with moderate luminosities and redshifts typically show a softer when brighter behaviour. Such a trend has rarely been investigated for high-luminosity AGNs ($ L_{bol}\gtrsim 10^{44}$ erg/s), nor for a wider redshift range (e.g. $0\lesssim z\lesssim 5$). Aims. We present an analysis of spectral variability based on a large sample of 2,700 quasars, measured at several different epochs, extracted from the fifth release of the XMM-Newton Serendipitous Source Catalogue. Methods. We quantified the spectral variability through the parameter $β$ defined as the ratio between the change in the photon index $Γ$ and the corresponding logarithmic flux variation, $β=-ΔΓ/Δ\log F_X$. Results. Our analysis confirms a softer when brighter behaviour for our sample, extending the previously found general trend to high luminosity and redshift. We estimate an ensemble value of the spectral variability parameter $β=-0.69\pm0.03$. We do not find dependence of $β$ on redshift, X-ray luminosity, black hole mass or Eddington ratio. A subsample of radio-loud sources shows a smaller spectral variability parameter. There is also some change with the X-ray flux, with smaller $β$ (in absolute value) for brighter sources. We also find significant correlations for a small number of individual sources, indicating more negative values for some sources.
description: 11 pages, 10 figures. Accepted for publication in Astronomy & Astrophysics
Male sex pheromone in the parasitoid wasp Nasonia longicornis: Chemical and behavioral analyses
Creators: name: Kurtanovic, Alisa
name: Hofferberth, John
name: Ruther, Joachim
Publisher: name: Universität Regensburg
Year: 2022
Subjects: subject: mate finding, parasitic wasp, precopulatory isolation, sex attractant, species-specificity, (4R,5S)-5-hydroxydecanolide, (4R,5R)-5-hydroxydecanolide, 4-methylquinazoline
subject: 590 Tiere (Zoologie)

description: The use of sex pheromones for the attraction of potential mating partners is widespread in insects. Species-specificity of these chemical signals is essential, particularly in closely related species with overlapping habitats. In parasitoid wasps of the genus Nasonia, it is the males that produce sex pheromones in their rectal vesicles. The genus consists of four species: N. vitripennis (Nv), N. giraulti (Ng), N. oneida (No), and N. longicornis (Nl). The cosmopolitan species Nv is sympatric with Ng and No in eastern North America and with Nl in the west. Interspecific courtship is common in Nasonia although hybridization is prevented in most combinations by Wolbachia-mediated cytoplasmic incompatibility. The pheromone of Nv males differs from all Nasonia congeners by an additional component that is believed to ensure precopulatory isolation from the sympatric congeners. Detailed investigations on these interactions, however, exist only for the species combination Nv/Ng. Here, we report the results of chemical and behavioral investigations on the sex pheromone of Nl males. The pheromone consists of (4R,5S)-5-hydroxy-4-decanolide (RS) and 4-methylquinazoline (MQ) as a minor component which are produced only after eclosion. Pheromone titers peaked 2 days after eclosion and remained constant on day three. The pheromone is deposited by abdomen dipping which males increasingly exhibited after mating or brief contact with a female. The presence of hosts containing females about to emerge did not increase marking behavior. Site fidelity of males at their own pheromone markings is mediated by MQ. Both natural and synthetic pheromone attracted virgin but not mated females and both RS and MQ are required for female attraction. Females collected during emergence from the host responded likewise to the pheromone and 84% of them produced mixed-sex offspring showing that most of them emerge unmated. Nl females preferred pheromone extract from conspecific males to extract from Nv males, and the addition of the Nv-specific component (4R,5R)-5-hydroxy-4-decanolide (RR) to the Nl pheromone made them unresponsive. The present study demonstrates that Nl uses the male sex pheromone in a similar way as previously shown for Nv and Ng. Furthermore, it shows that Nl females use the Nv-specific pheromone component RR to avoid costly sexual interactions with Nv males in regions of sympatry.
Spectral performance of SKA Log-periodic Antennas I: Mitigating spectral artefacts in SKA1-LOW 21-cm cosmology experiments
Creators: name: Acedo, Eloy de Lera
name: Trott, Cathryn M.
name: Wayth, Randall B.
name: Fagnoni, Nicolas
name: Bernardi, Gianni
name: Wakley, Brett
name: Koopmans, Leon V. E.
name: Faulkner, Andrew J.
name: de Vaate, Jan Geralt bij
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper is the first in a series of papers describing the impact of antenna instrumental artefacts on the 21-cm cosmology experiments to be carried out by the low frequency instrument (SKA1-LOW) of the Square Kilometre Array telescope (SKA), i.e., the Cosmic Dawn (CD) and the Epoch of Reionization (EoR). The smoothness of the passband response of the current log-periodic antenna being developed for the SKA1-LOW is analyzed using numerical electromagnetic simulations. The amplitude variations over the frequency range are characterized using low-order polynomials defined locally, in order to study the impact of the passband smoothness in the instrument calibration and CD/EoR Science. A solution is offered to correct a fast ripple found at 60~MHz during a test campaign at the SKA site at the Murchison Radio-astronomy Observatory, Western Australia in September 2015 with a minor impact on the telescope's performance and design. A comparison with the Hydrogen Epoch of Reionization Array antenna is also shown demonstrating the potential use of the SKA1-LOW antenna for the Delay Spectrum technique to detect the EoR.
description: 11 pages, 12 figures, accepted for publication (MNRAS)
Letter from E.M. Forster to Alec Randall, June 20, 1932
Creators: name: Forster, E. M. (Edward Morgan), 1879-1970
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Ambassadors
valueUri: http://id.worldcat.org/fast/806713
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Diplomatic and consular service
valueUri: http://id.worldcat.org/fast/894202
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Randall, Alec, 1892-
subject: Forster, E. M. (Edward Morgan), 1879-1970
valueUri: http://id.worldcat.org/fast/40913
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455
subject: Diplomats
valueUri: http://id.worldcat.org/fast/894415
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684

description: Part of a collection of letters written by E.M. Forster to Sir Alec Randall. They concern, firstly, his trip to Rumania, where he stayed with the Randalls; a tour in France in 1928; and his journey home. Later letters include references to such literary people as Herbert Read, Harold Monro and T.S. Eliot, plus a mention of reading James Joyce's "Ulysses". He also refers to his visit to Africa and his sentiments about the Spanish Civil War and W.W.II. Most of the later letters are signed "Morgan". E. M. Forster was born in London. He is principally known as a novelist and was associated with the Bloomsbury Group, which included Virginia Woolf. Among his best known works are "A Room With A View" (1911) and "A Passage To India" (1924). Many of his novels have been dramatized. He also wrote short stories, drama, non-fiction and criticism. He died at King's College, Cambridge, where he had resided since the mid 1940s. His friend, Sir Alec Randall was with the British legation in Bucharest, Rumania, and was later appointed to serve in Rome. Postcard sent from Krakow, Poland.
Twisted Partition Functions and $H$-Saddles
Creators: name: Hwang, Chiung
name: Yi, Piljin
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: While studying supersymmetric $G$-gauge theories, one often observes that a zero-radius limit of the twisted partition function $Ω^G$ is computed by the partition function ${\cal Z}^G$ in one less dimensions. We show that this type of identification fails generically due to integrations over Wilson lines. Tracing the problem, physically, to saddles with reduced effective theories, we relate $Ω^G$ to a sum of distinct ${\cal Z}^H$'s and classify the latter, dubbed $H$-saddles. This explains why, in the context of pure Yang-Mills quantum mechanics, earlier estimates of the matrix integrals ${\cal Z}^{G}$ had failed to capture the recently constructed bulk index ${\cal I}^G_{\rm bulk}$. The purported agreement between 4d and 5d instanton partition functions, despite such subtleties also present in the ADHM data, is explained.
description: 37 pages; a new appendix on examples with high rank classical groups
VITALISE D3.4 Panel Management_demonstrator
Creators: name: Macroglou Stavroula-Lina
name: Vasilopoulos Paschalis
name: Timoleon Michalis
name: Petsani Despoina
Publisher: name: Zenodo
Year: 2022

description: This deliverable presents the content and the features of the panel management tool, as they are implemented in the VITALISE project. Panel management is referred to the coordination and research of a group of people, in our case the whole spectrum of Living Lab stakeholders, that receive services from an organization, in our case the Living Lab. VITALISE designs and implements an ICT tool that is used by Living Labs to facilitate the Panel management work such as organize research activities, schedule events, organize communications with stakeholders and keep track of these events. The purpose of this document is to present in detail all the implemented features in the panel management ICT tool, named thePaneLab (https://app.thepanelab.com/). The paneLab supports an easy and well-structured digital workspace. It has an easy login procedure and clear content and menu, including the main features of the tool that are the contacts, projects and events. Through contacts, it provides an easy access to the stakeholders’ names, contact information and previous interactions as well as gives the opportunity to add new members or change existing information. In “projects” the user can have access to the already existing projects of a Living Lab as well as add a new project the Living Lab organization. The feature “events”, allows the user to organize and keep track of activities and user engagement for upcoming and past Living Lab events. The tool also provides a feedback form for collecting information about new features requested by the users or changes in the existing features. Researchers of the VITALISE already use the panel management in their Living Labs and provide useful feedback and practical advice for the better implementation of the panel in research activities. The paneLab is a fully functional web application, that consists of the Back-End, which is responsible for the handling of data, and the Front-End which is a User Interface for the Back-End. The VITALISE team is constantly working towards implementing and integrating additional functionalities as requested by the Living Lab community. Within the context of VITALISE, the paneLab is used to support the management and planning of the VITALISE Living Lab panels and facilitate the communications for the upcoming real-life testing of the Joint Research Activities. The tool will be used also by external researchers that will join VITALISE Living Labs for Transnational Access visits.
Searching for Intermediate Mass Black Holes in galaxies with Low Luminosity AGN: A multiple-method approach
Creators: name: Koliopanos, Filippos
name: Ciambur, Bogdan C.
name: Graham, Alister W.
name: Webb, Natalie A.
name: Coriat, Mickael
name: Mutlu-Pakdil, Burcin
name: Davis, Benjamin L.
name: Godet, Olivier
name: Barret, Didier
name: Seigar, Marc S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims: This work is the first stage of a campaign to search for IMBHs, in low luminosity AGN (LLAGN) and dwarf galaxies. An additional, and equally important, aim of this pilot study is to investigate the consistency between the predictions of several BH scaling relations and the fundamental plane of black hole activity (FP-BH). Methods: We use X-ray and radio luminosity relations in accreting BHs, along with the latest scaling relations between the mass of the central black hole (MBH) and the properties of its host spheroid, to predict MBH in seven LLAGN, that were previously reported to be in the IMBH regime. Namely, we use the recently re-evaluated MBH - Msph (Msph : spheroid absolute magnitude at 3.6 microm) scaling relation for spiral galaxies, the MBH - nsph (nsph : major axis Sersic index of the bulge) relation, the MBH - PA (PA: pitch angle) relation and the FP-BH for weakly accreting BHs, to independently estimate MBH in all seven galaxies. Results: We find that all LLAGN in our list have low-mass central black holes - with log MBH/Msol~6.5 on average - but they are, not IMBHs. All 4 methods used predicted consistent BH masses, in the 1sigma range. Furthermore, we report that, in contrast to previous classification, galaxy NGC 4470 is bulge-less, and cast doubts on the AGN classification of NGC 3507. Conclusions: We find that our latest, state-of-the-art techniques for bulge magnitude & Sersic index computations and the most recent updates of the MBH - Lsph, MBH - nsph , MBH - PA relations and the FP-BH produce consistent results in the low mass regime. We establish a multiple method approach for predicting BH masses in the regime where their spheres-of- grav. influence cannot be spatially resolved. Our approach mitigates against outliers from any one relation and provides a more robust average prediction. We will use our new method to revisit more IMBH candidates in LLAGN
description: Accepted by A&A: 14 pages, 4 figures, 2 tables
Obciążenia psychospołeczne w zawodzie pedagoga - wstępne wyniki badań uzyskane Kwestionariuszem Obciążeń Zawodowych Pedagoga (KOZP) ; Psychosocial burdens in teaching profession - initial results of Questionnaire of Occupational Burdens in Teaching (QOBT)
Creators: name: Pyżalski, Jacek
name: Pyżalski, Jacek
Publisher: name: Zenodo
Year: 2008

description: Abstract Background: Th is article presents the results obtained using a new tool for measuring psychosocial burdens in teaching profession — the Questionnaire of Occupational Burdens in Teaching (QOBT). In its fi rst theoretical part, some typologies of stressors in teaching, developed in other countries, are presented and the need to construct a new tool in Poland is discussed. Material and Methods: In this part, the construction process of the new tool and its three scales comprising: Confl ict Situations, Organizational Burdens and Lack of Work Sense are described. Th e psychometric features of the new questionnaire (e.g., Cronbach α = 0.63–0.84) are also given. Th e results are based on a large random sample of teachers from the Łódź voivodeship. Results and Conclusions: Th e results did not show signifi cant diff erences in the level of occupational burdens between men and women. Generally, neither are seniority and age related to the level of burdens. One exception are Organizational burdens that slightly more aff ect older teachers. Th e study also showed the need to incorporate the activities at the organizational level into programs on occupational stress. Med Pr 2008;59(3):229–235 Key words: occupational stress, teacher, workplace health promotion
Letter from A. R. Orage to Herbert Read, June 01, 1921
Creators: name: Orage, A. R. (Alfred Richard), 1873-1934
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Uspenskiĭ, P. D. (Petr Demʹi︠a︡novich), 1878-1947
valueUri: http://id.worldcat.org/fast/15966
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Editors
valueUri: http://id.worldcat.org/fast/902475
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Periodical editors
valueUri: http://id.worldcat.org/fast/1058064
subject: Orage, A. R. (Alfred Richard), 1873-1934
valueUri: http://id.worldcat.org/fast/822

description: Part of a collection of correspondence between Sir Herbert Read and Alfred Richard Orage. Orage is most well-known for editing the magazine “The New Age”. These letters, spanning 1921 and 1922, primarily discuss Read’s work as a Readers and Writers columnist for the magazine in that time. In these letters Orage also frequently mentions P. D. Ouspensky, who studied under philosopher G. I. Gurdjieff. In 1922 Orage sold “The New Age” and moved to Paris in order to also study under Gurdjieff. At the opening of this letter Orage apologies for not sending the Hulme manuscript, but writes that the meeting with "F.S." went very well. In this letter Orage also invites Read to write "R. & W." for six months.
Is spin superfluidity possible in YIG films?
Creators: name: Sonin, E. B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recently it was suggested that stationary spin supercurrents (spin superfluidity) are possible in the magnon condensate observed in yttrium-iron-garnet (YIG) magnetic films under strong external pumping. Here we analyze this suggestion. From topology of the equilibrium order parameter in YIG one must not expect energetic barriers making spin supercurrents metastable. However some small barriers of dynamical origin are possible nevertheless. The critical phase gradient (analog of the Landau critical velocity in superfluids) is proportional to intensity of the coherent spin wave (number of condensed magnons). The conclusion is that although spin superfluidity in YIG films is possible in principle, the published claim of its observation is not justified. The analysis revealed that the widely accepted spin-wave spectrum in YIG films with magnetostatic and exchange interaction required revision. This led to revision of non-linear corrections, which determine stability of the magnon condensate with and without spin supercurrents.
description: A new section and two figures added, 9 pages, 4 figures
Three-dimensional vortex structures and dynamics in hexagonal manganites
Creators: name: Xue, Fei
name: Wang, Nan
name: Wang, Xueyun
name: Ji, Yanzhou
name: Cheong, Sang-Wook
name: Chen, Long-Qing
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Hexagonal manganites REMnO3 (RE, rare earths) have attracted significant attention due to their potential applications as multiferroic materials and the intriguing physics associated with the topological defects. The two-dimensional (2D) and 3D domain and vortex structure evolution of REMnO3 is predicted using the phase-field method based on a thermodynamic potential constructed from first-principles calculations. In 3D spaces, vortex lines show three types of topological changes, i.e. shrinking, coalescence, and splitting, with the latter two caused by the interaction and exchange of vortex loops. Compared to the coarsening rate of the isotropic XY model, the six-fold degeneracy gives rise to negligible differences with the vortex-antivortex annihilation controlling the scaling dynamics, whereas the anisotropy of interfacial energy results in a deviation. The temporal evolution of domain and vortex structures serves as a platform to fully explore the mesoscale mechanisms for the 0-D and 1-D topological defects.
description: 19 pages, 5 figures
Two Small Transiting Planets and a Possible Third Body Orbiting HD 106315
Creators: name: Crossfield, Ian J. M.
name: Ciardi, David R.
name: Isaacson, Howard
name: Howard, Andrew W.
name: Petigura, Erik A.
name: Weiss, Lauren M.
name: Fulton, Benjamin J.
name: Sinukoff, Evan
name: Schlieder, Joshua E.
name: Mawet, Dimitri
name: Ruane, Garreth
name: de Pater, Imke
name: de Kleer, Katherine
name: Davies, Ashley G.
name: Christiansen, Jessie L.
name: Dressing, Courtney D.
name: Hirsch, Lea
name: Benneke, Björn
name: Crepp, Justin R.
name: Kosiarek, Molly
name: Livingston, John
name: Gonzales, Erica
name: Beichman, Charles A.
name: Knutson, Heather A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The masses, atmospheric makeups, spin-orbit alignments, and system architectures of extrasolar planets can be best studied when the planets orbit bright stars. We report the discovery of three bodies orbiting HD 106315, a bright (V = 8.97 mag) F5 dwarf targeted by our K2 survey for transiting exoplanets. Two small, transiting planets have radii of 2.23 (+0.30/-0.25) R_Earth and 3.95 (+0.42/-0.39) R_Earth and orbital periods of 9.55 d and 21.06 d, respectively. A radial velocity (RV) trend of 0.3 +/- 0.1 m/s/d indicates the likely presence of a third body orbiting HD 106315 with period >160 d and mass >45 M_Earth. Transits of this object would have depths of >0.1% and are definitively ruled out. Though the star has v sin i = 13.2 km/s, it exhibits short-timescale RV variability of just 6.4 m/s, and so is a good target for RV measurements of the mass and density of the inner two planets and the outer object's orbit and mass. Furthermore, the combination of RV noise and moderate v sin i makes HD 106315 a valuable laboratory for studying the spin-orbit alignment of small planets through the Rossiter-McLaughlin effect. Space-based atmospheric characterization of the two transiting planets via transit and eclipse spectroscopy should also be feasible. This discovery demonstrates again the power of K2 to find compelling exoplanets worthy of future study.
description: 8 pages, 2 figures, ApJ accepted, with updated RV analysis
The Graovac-Pisanski Index of Zig-Zag Tubulenes and the Generalized Cut Method
Creators: name: Tratnik, Niko
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C25, 92E10

description: The Graovac-Pisanski index, which is also called the modified Wiener index, was introduced in 1991 by A. Graovac and T. Pisanski. This variation of the classical Wiener index takes into account the symmetries of a graph. In 2016 M. Ghorbani and S. Klavžar calculated this index by using the cut method, which we generalize in this paper. Moreover, we prove that in some cases the automorphism group of a zig-zag tubulene is isomorphic to the direct product of a dihedral group and a cyclic group. Finally, the closed formulas for the Graovac-Pisanski index of zig-zag tubulenes are calculated.
Point-contact function of the electron-phonon interaction in zirconium
Creators: name: Bobrov, N. L.
name: Rybaltchenko, L. F.
name: Fisun, V. V.
name: Khotkevich, A. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Experimental study of the electron-phonon interaction (EPI) spectra of zirconium was carried out using Yanson's point-contact (PC) spectroscopy. The EPI spectral function and constant were determined. Both homocontacts ($Zr-Zr$) and heterocontacts ($Zr-Cu$, $Zr-Ag$, and $Zr-Au$) were studied. No contribution by copper, silver or gold to the heterocontact spectra was detected. The positions of five phonon features of the EPI function were observed at energies 5-6, 9-11, 13-15, 18-20, and 27-29 $meV$. The observed diversity of the PC spectra was attributed to the anisotropy of $Zr$. pacs{71.38.-k, 73.40.Jn, 74.25.Kc, 74.45.+c}
description: 8 pages, 9 figures
Energy flow in biological system: Bioenergy transduction of V1-ATPase molecular rotary motor from E. hirae
Creators: name: Yamato, Ichiro
name: Murata, Takeshi
name: Khrennikov, Andrei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Biomolecules (q-bio.BM)
subject: Quantum Physics (quant-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We classify research fields in biology into those on flows of materials, energy, and information. As a representative energy transducing machinery in biology, our research target, V1-ATPase from a bacterium Enterococcus hirae, a typical molecular rotary motor is introduced. Structures of several intermediates of the rotary motor are described and the molecular mechanism of the motor converting chemical energy into mechanical energy is discussed. Comments and considerations on the information flow in biology, especially on the thermodynamic entropy in quantum physical and biological systems, are added in a separate section containing the biologist friendly presentation of this complicated question.
description: Progress in Biophysics and Molecular Biology, 2017
Simulations of Fractal Star Cluster Formation: I. New Insights for Measuring Mass Segregation of Star Clusters with SubStructure
Creators: name: Yu, Jincheng
name: Puzia, Thomas H.
name: Lin, Congping
name: Zhang, Yiwei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We compare the existent methods including the minimum spanning tree based method and the local stellar density based method, in measuring mass segregation of star clusters. We find that the minimum spanning tree method reflects more the compactness, which represents the global spatial distribution of massive stars, while the local stellar density method reflects more the crowdedness, which provides the local gravitational potential information. It is suggested to measure the local and the global mass segregation simultaneously. We also develop a hybrid method that takes both aspects into account. This hybrid method balances the local and the global mass segregation in the sense that the predominant one is either caused either by dynamical evolution or purely accidental, especially when such information is unknown a priori. In addition, we test our prescriptions with numerical models and show the impact of binaries in estimating the mass segregation value. As an application, we use these methods on the Orion Nebula Cluster (ONC) observations and the Taurus cluster. We find that the ONC is significantly mass segregated down to the 20th most massive stars. In contrast, the massive stars of the Taurus cluster are sparsely distributed in many different subclusters, showing a low degree of compactness. The massive stars of Taurus are also found to be distributed in the high-density region of the subclusters, showing significant mass segregation at subcluster scales. Meanwhile, we also apply these methods to discuss the possible mechanisms of the dynamical evolution of the simulated substructured star clusters.
description: 14 pages, 13 figures. minor changes, matches published version
Letter from E.M. Forster to Alec Randall, December 18, 1936
Creators: name: Forster, E. M. (Edward Morgan), 1879-1970
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Ambassadors
valueUri: http://id.worldcat.org/fast/806713
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Diplomatic and consular service
valueUri: http://id.worldcat.org/fast/894202
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Randall, Alec, 1892-
subject: Diplomats
valueUri: http://id.worldcat.org/fast/894415
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Forster, E. M. (Edward Morgan), 1879-1970
valueUri: http://id.worldcat.org/fast/40913
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455

description: Part of a collection of letters written by E.M. Forster to Sir Alec Randall. They concern, firstly, his trip to Rumania, where he stayed with the Randalls; a tour in France in 1928; and his journey home. Later letters include references to such literary people as Herbert Read, Harold Monro and T.S. Eliot, plus a mention of reading James Joyce's "Ulysses". He also refers to his visit to Africa and his sentiments about the Spanish Civil War and W.W.II. Most of the later letters are signed "Morgan". E. M. Forster was born in London. He is principally known as a novelist and was associated with the Bloomsbury Group, which included Virginia Woolf. Among his best known works are "A Room With A View" (1911) and "A Passage To India" (1924). Many of his novels have been dramatized. He also wrote short stories, drama, non-fiction and criticism. He died at King's College, Cambridge, where he had resided since the mid 1940s. His friend, Sir Alec Randall was with the British legation in Bucharest, Rumania, and was later appointed to serve in Rome. Forster discusses his health and his work.
On the image of the parabolic Hitchin map
Creators: name: Baraglia, David
name: Kamgarpour, Masoud
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B67, 17B69, 22E50, 20G25

description: We determine the image of the (strongly) parabolic Hitchin map for all parabolics in classical groups and $G_2$. Surprisingly, we find that the image is isomorphic to an affine space in all cases, except for certain "bad parabolics" in type $D$, where the image can be singular.
description: In this paper we compute the base of the strongly parabolic Hitchin map. In the companion paper arXiv:1608.05454 we prove that this gives a completely integrable system
Development of a Transferable Reactive Force Field of P/H Systems: Application to the Chemical and Mechanical Properties of Phosphorene
Creators: name: Xiao, Hang
name: Shi, Xiaoyang
name: Hao, Feng
name: Liao, Xiangbiao
name: Zhang, Yayun
name: Chen, Xi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: ReaxFF provides a method to model reactive chemical systems in large-scale molecular dynamics simulations. Here, we developed ReaxFF parameters for phosphorus and hydrogen to give a good description of the chemical and mechanical properties of pristine and defected black phosphorene. ReaxFF for P/H is transferable to a wide range of phosphorus and hydrogen containing systems including bulk black phosphorus, blue phosphorene, edge-hydrogenated phosphorene, phosphorus clusters and phosphorus hydride molecules. The potential parameters were obtained by conducting unbiased global optimization with respect to a set of reference data generated by extensive ab initio calculations. We extend ReaxFF by adding a 60° correction term which significantly improves the description of phosphorus clusters. Emphasis has been put on obtaining a good description of mechanical response of black phosphorene with different types of defects. Compared to nonreactive SW potential [1], ReaxFF for P/H systems provides a huge improvement in describing the mechanical properties the pristine and defected black phosphorene and the thermal stability of phosphorene nanotubes. A counterintuitive phenomenon is observed that single vacancies weaken the black phosphorene more than double vacancies with higher formation energy. Our results also show that mechanical response of black phosphorene is more sensitive to defects for the zigzag direction than for the armchair direction. Since ReaxFF allows straightforward extensions to the heterogeneous systems, such as oxides, nitrides, ReaxFF parameters for P/H systems build a solid foundation for the reactive force field description of heterogeneous P systems, including P-containing 2D van der Waals heterostructures, oxides, etc.
Letter from A. R. Orage to Herbert Read, June 16, 1921
Creators: name: Orage, A. R. (Alfred Richard), 1873-1934
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Editors
valueUri: http://id.worldcat.org/fast/902475
subject: Orage, A. R. (Alfred Richard), 1873-1934
valueUri: http://id.worldcat.org/fast/822
subject: Periodical editors
valueUri: http://id.worldcat.org/fast/1058064
subject: Uspenskiĭ, P. D. (Petr Demʹi︠a︡novich), 1878-1947
valueUri: http://id.worldcat.org/fast/15966
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945

description: Part of a collection of correspondence between Sir Herbert Read and Alfred Richard Orage. Orage is most well-known for editing the magazine “The New Age”. These letters, spanning 1921 and 1922, primarily discuss Read’s work as a Readers and Writers columnist for the magazine in that time. In these letter Orage also frequently mentions P. D. Ouspensky, who studied under philosopher G. I. Gurdjieff. In 1922 Orage sold “The New Age” and moved to Paris in order to also study under Gurdjieff. In this letter, Orage suggests articles on Hulme material. This letter also discusses New Age and Read's column.
SUPER, una Aplicación para Mejorar la Accesibilidad Cognitiva de Micropoemas: Información Adicional
Creators: name: Suárez-Figueroa, Mari Carmen
name: Diab, Isam
name: Martín, Anabel
Publisher: name: Zenodo
Year: 2022

description: This record presents the supplementary information of the paper entitled "SUPER, una Aplicación para Mejorar la Accesibilidad Cognitiva de Micropoemas" (written in Spanish): A demo video showing how SUPER works Corpus of original micropoems Corpus of micropoems adapted to Easy-to-Read by SUPER A table with the meter and rythm of original and adapted micropoems in the corpora An example of the questionnaire (via Google Forms) we used in the cualitative evaluation of SUPER A CSV file with the readability indexes calculated by SUPER for the micropoems in the corpora
Obciążenia psychospołeczne w miejscu pracy pedagoga związane z niewłaściwymi zachowaniami uczniów ; Teachers' psychosocial burdens at work resulting from student misbehavior
Creators: name: Pyżalski, Jacek
name: Pyżalski, Jacek
Publisher: name: Zenodo
Year: 2008

description: Abstract Background: In the paper psychosocial burdens in the teaching profession, resulting from the misbehavior of students, are presented. Th ey are analyzed in a broader context, taking account of occupational stress and its health consequences teachers are exposed to. Material and Methods: Th e given data present the outcome of the syrvey conducted on a representative sample of teachers (n = 429) from the Łódź voivodeship. Results and Conclusions: Th e results show that student misbehavior (in milder forms) is quite frequent in teacher's workplace. Severe misbehavior, e.g., vulgar language, verbal aggression toward teachers or other students, was rather rare Younger and male teachers were more frequently exposed to student misbehavior. In addition, it correlated positively with social support received from teacher's colleagues. Th e results of the survey emphasize the need to identify student misbehavior problems in terms of teacher's occupational stress. Th e need to assure social support for teachers should also be taken into account in their workplace health promotion programs. Med Pr 2008;59(4):307–313 Key words: occupational stress, teacher, student misbehavior
On the algebraic quantization of a massive scalar field in anti-de-Sitter spacetime
Creators: name: Dappiaggi, Claudio
name: Ferreira, Hugo R. C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81T20, 81T05

description: We discuss the algebraic quantization of a real, massive scalar field in the Poincaré patch of the (d+1)-dimensional anti-de Sitter spacetime, with arbitrary boundary conditions. By using the functional formalism, we show that it is always possible to associate to such system an algebra of observables enjoying the standard properties of causality, time-slice axiom and F-locality. In addition, we characterize the wavefront set of the ground state associated to the system under investigation. As a consequence, we are able to generalize the definition of Hadamard states and construct a global algebra of Wick polynomials.
description: 24 pages, 3 figures. V2: some extra clarification and discussion in sections 4.1 and 4.4
Associated heavy quarks pair production with Higgs as a tool for a search for non-perturbative effects of the electroweak interaction at the LHC
Creators: name: Arbuzov, B. A.
name: Zaitsev, I. V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Assuming an existence of an anomalous triple electro-weak bosons interaction being defined by coupling constant $λ$, we calculate its contribution to interactions of the Higgs with pairs of heavy particles. Bearing in mind experimental restrictions $-0.011 < λ< 0.011$ we present results for possible effects in processes $p\,p \to W^+ W^- H,\,p\,p \to W^+ Z H,\,p\,p \to W^- Z H,\,p\,p \to \bar t t H $, $p p \to \bar b b H$. Effects could be significant with negative sign of $λ$ in associated heavy quarks $t,\,b$ pairs production with the Higgs. In calculations we rely on results of the non-perturbative approach to a spontaneous generation of effective interactions, which defines the form-factor of the three-boson anomalous interaction.
description: 6 pages, 2 figures, few typos corrected, references added
title: Vectorial variational problems in L∞ and applications to data assimilation
Creators: name: Clark, Ed
Publisher: name: University of Reading
Year: 2023

description: This thesis is a collection of published, submitted and developing papers. Each paper is presented as a chapter of this thesis, in each paper we advance the field of vectorial Calculus of Variations in L ∞. This new progress includes constrained problems, such as the constraint of the Navier-Stokes equations studied in Chapter 2. Additionally the combination of constraints, including a nonlinear operator and a supremal functional, deliberated in Chapter 3. Finally, Chapter 4 presents an alternative supremal constraint, in the contemplation of the second order generalised ∞-eigenvalue problem. In Chapter 2 we introduce the joint paper with Nikos Katzourakis and Boris Muha. We study a minimisation problem in L p and L ∞ for certain cost functionals, where the class of admissible mappings is constrained by the Navier-Stokes equations. Problems of this type are motivated by variational data assimilation for atmospheric flows arising in weather forecasting. Herein we establish the existence of PDE-constrained minimisers for all p, and also that L p minimisers converge to L ∞ minimisers as p → ∞. We further show that L p minimisers solve an Euler-Lagrange system. Finally, all special L ∞ minimisers constructed via approximation by L p minimisers are shown to solve a divergence PDE system involving measure coefficients, which is a divergence form counterpart of the corresponding nondivergence Aronsson-Euler system. In Chapter 3 we present the joint paper with Nikos Katzourakis. We study minimisation problems in L ∞ for general quasiconvex first order functionals, where the class of admissible mappings is constrained by the sublevel sets of another supremal functional and by the zero set of a nonlinear operator. Examples of admissible operators include those expressing pointwise, unilateral, integral isoperimetric, elliptic quasilinear differential, Jacobian and null Lagrangian constraints. Via the method of L p approximations as p → ∞, we illustrate the existence of a special L ∞ minimiser which solves a divergence PDE system involving certain auxiliary measures as coefficients. This system can be seen as a divergence form counterpart of the Aronsson PDE system which is associated with the constrained L ∞ variational problem. Chapter 4 provides part of the corresponding developing preprint, joint work with Nikos Katzourakis. We consider the problem of minimising the L ∞ norm of a function of the Hessian over a class of maps, subject to a mass constraint involving the L ∞ norm of a function of the gradient and the map itself. We assume zeroth and first order Dirichlet boundary data, corresponding to the “hinged” and the “clamped” cases. By employing the method of L p approximations, we establish the existence of a special L ∞ minimiser, which solves a divergence PDE system with measure coefficients as parameters. This is a counterpart of the Aronsson-Euler system corresponding to this constrained variational problem.