cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Central kinematics of the Galactic globular cluster M80
Creators: name: Göttgens, Fabian
name: Kamann, Sebastian
name: Baumgardt, Holger
name: Dreizler, Stefan
name: Giesers, Benjamin
name: Husser, Tim-Oliver
name: Brok, Mark den
name: Fétick, Romain
name: Krajnović, Davor
name: Weilbacher, Peter M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We use spectra observed with the integral-field spectrograph MUSE to reveal the central kinematics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Using observations obtained with the recently commissioned narrow-field mode of MUSE, we are able to analyse 932 stars in the central 7.5 arcsec by 7.5 arcsec of the cluster for which no useful spectra previously existed. Mean radial velocities of individual stars derived from the spectra are compared to predictions from axisymmetric Jeans models, resulting in radial profiles of the velocity dispersion, the rotation amplitude, and the mass-to-light ratio. The new data allow us to search for an intermediate-mass black hole (IMBH) in the centre of the cluster. Our Jeans model finds two similarly probable solutions around different dynamical cluster centres. The first solution has a centre close to the photometric estimates available in the literature and does not need an IMBH to fit the observed kinematics. The second solution contains a location of the cluster centre that is offset by about 2.4 arcsec from the first one and it needs an IMBH mass of $4600^{+1700}_{-1400}$ solar masses. N-body models support the existence of an IMBH in this cluster with a mass of up to 6000 solar masses in this cluster, although models without an IMBH provide a better fit to the observed surface brightness profile. They further indicate that the cluster has lost nearly all stellar-mass black holes. We further discuss the detection of two potential high-velocity stars with radial velocities of 80 to 90 km/s relative to the cluster mean.
description: accepted for publication in MNRAS; data can be found here: https://doi.org/10.25625/VCNHOR
Mixing-induced global modes in open active flow
Creators: name: Straube, Arthur V.
name: Pikovsky, Arkady
Publisher: name: arXiv
Year: 2007
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We describe how a convectively unstable active field in an open flow configuration becomes absolutely unstable due to local mixing. A representation of the mixing region as those with locally enhanced effective diffusion allows us to find the linear transition point to unstable global mode analytically. We derive the critical exponent characterizing weakly nonlinear regimes beyond instability and compare it with numerical simulations of a full two-dimensional flow problem.
description: new version with some minor changes, added journal reference and DOI information; 4 pages, 4 figures, published in Physical Review Letters
Cosmic Axion Force
Creators: name: Kim, Dongok
name: Kim, Younggeun
name: Semertzidis, Yannis K.
name: Shin, Yun Chang
name: Yin, Wen
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Nambu-Goldstone bosons, or axions, may be ubiquitous. Some of the axions may have small masses and thus serve as mediators of long-range forces. In this paper, we study the force mediated by an extremely light axion, $ϕ$, between the visible sector and the dark sector, where dark matter lives. Since nature does not preserve the CP symmetry, the coupling between dark matter and $ϕ$ is generically CP-violating. In this case, the induced force is extremely long-range and behaves as an effective magnetic field. If the force acts on electrons or nucleons, the spins of them on Earth precess around a fixed direction towards the galactic center. This provides an experimental opportunity for $ϕ$ with mass, $m_ϕ$, and decay constant, $f_ϕ$, satisfying $m_ϕ\lesssim 10^{-25}\,$ eV, $f_ϕ\lesssim 10^{14}\,$GeV if the daily modulation of the effective magnetic field signals in magnetometers is measured by using the coherent averaging method. The effective magnetic field induced by an axionic compact object, such as an axion domain wall, is also discussed.
description: 30pages, 8figures
Die Protokolle des Preußischen Staatsministeriums 1817-1934/38. Bd. 10: 14. Juli 1909 bis 11. November 1918
Creators: name: Hackmann, Jörg
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 1 (2001)
Probing superconducting energy gap from infrared spectroscopy on a Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ single crystal with T$_c$=37 K
Creators: name: Li, G.
name: Hu, W. Z.
name: Dong, J.
name: Li, Z.
name: Zheng, P.
name: Chen, G. F.
name: Luo, J. L.
name: Wang, N. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We performed optical spectroscopy measurement on a superconducting Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ single crystal with T$_c$=37 K. Formation of the superconducting energy gaps in the far-infared reflectance spectra below T$_c$ is clearly observed. The gap amplitudes match well with the two distinct superconducting gaps observed in angle-resolved photoemission spectroscopy experiments on different Fermi surfaces. We determined absolute value of the penetration depth at 10 K as $λ\simeq2000 Å$. A spectral weight analysis shows that the Ferrell-Glover-Timkham sum rule is satisfied at low energy scale, less than 6$Δ$.
description: 4 pages, 5 figures
Kazimierz Puchowski, Edukacja historyczna w jezuickich kolegiach Rzeczypospolitej 1565-1773
Creators: name: Hartmann, Stefan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 3 (2001)
On Liquid Viscosity Effects on Droplet Splash and Receding Breakup on a Smooth Solid Surface at Atmospheric Pressure
Creators: name: Yang, Lei
name: Li, Zhonghong
name: Yang, Tao
name: Chi, Yicheng
name: Zhang, Peng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Experimental and modelling study is presented for the effect of a wide range of liquid viscosities on the droplet impact on a smooth solid surface at atmospheric pressure. A non-monotonic variation of threshold between droplet deposition and splash was observed experimentally. Specifically, the critical Weber number separating deposition from splashing decreases and then increases with increasing the Ohnesorge number. The observations of splash in low viscosity region and receding breakup in high viscosity region were analyzed qualitatively from the perspectives of Kelvin-Helmholtz instability and Rayleigh-Taylor instability, respectively. Based on instability analysis for the viscosityinduced nonmonotonicity, a new semi-empirical correlation of droplet splashing thresholds is proposed by fitting experimental results from previous and present data and shows better performance than previous correlation formulas.
description: 21 pages, 9 figures, research article
Restoring productivity on severely degraded forest soil in British Columbia
Creators: name: Carr, William Wade
Publisher: name: University of British Columbia
Year: 2010

description: Forest road building and timber harvesting operations have been recognized as principal causes of forest soil degradation. These activities can result in accelerated soil erosion, excessive scarification, and/or increased soil density, which may adversely affect site productivity. A study of landing areas emphasize the deficiencies in current rehabilitation guidelines Increased soil density on both summer and winter landings was still evident at 30 cm and the soil nutrient quality was poor. Two field tests of a green fallow system on subsoil materials exposed by erosion and landing construction proved successful in building site nutrient capital to acceptable levels. Seedling growth response to green fallow crop establishment in the coastal study verified these findings. A benefit-cost analysis of several forest soil rehabilitation scenarios demonstrated the importance of including secondary and intangible factors. From a pecuniary standpoint, based on primary benefits and costs, rehabilitation was economically feasible only when a low social discount rate (2%) and an optimistic stumpage increase projection (3% per year), were used. A discussion of some secondary and intangible benefits (i.e., harvesting rates, employment, government revenues, erosion control, and industry image) stresses the need for effective forest soil rehabilitation.
Brightness Asymmetry of Black Hole Images as a Probe of Observer Inclination
Creators: name: Medeiros, Lia
name: Chan, Chi-Kwan
name: Narayan, Ramesh
name: Ozel, Feryal
name: Psaltis, Dimitrios
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Event Horizon Telescope recently captured images of the supermassive black hole in the center of the M87 galaxy, which show a ring-like emission structure with the South side only slightly brighter than the North side. This relatively weak asymmetry in the brightness profile along the ring has been interpreted as a consequence of the low inclination of the observer (around 17 deg for M87), which suppresses the Doppler beaming and boosting effects that might otherwise be expected due to the nearly relativistic velocities of the orbiting plasma. In this work, we use a large suite of general relativistic magnetohydrodynamic simulations to reassess the validity of this argument. By constructing explicit counter examples, we show that low-inclination is a sufficient but not necessary condition for images to have low brightness asymmetry. Accretion flow models with high accumulated magnetic flux close to the black hole horizon (the so-called magnetically arrested disks) and low black-hole spins have angular velocities that are substantially smaller than the orbital velocities of test particles at the same location. As a result, such models can produce images with low brightness asymmetry even when viewed edge on.
description: 10 pages, 11 figures, submitted to ApJ
Non-local sidewall response and deviation from exact quantization of the topological magnetoelectric effect in axion-insulator thin films
Creators: name: Pournaghavi, Nezhat
name: Pertsova, Anna
name: MacDonald, Allan H.
name: Canali, Carlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological insulator (TI) thin films with surface magnetism are expected to exhibit a quantized anomalous Hall effect (QAHE) when the magnetizations on the top and bottom surfaces are parallel, and a quantized topological magnetoelectric (QTME) response when the magnetizations have opposing orientations (axion insulator phase) and the films are sufficiently thick. We present a unified picture of both effects that associates deviations from exact quantization of the QTME caused by finite thickness with non-locality in the side-wall current response function. Using realistic tight-binding model calculations, we show that in $Bi_2Se_3$ TI thin films deviations from quantization in the axion insulator-phase are reduced in size when the exchange coupling of tight-binding model basis states to the local magnetization near the surface is strengthened. Stronger exchange coupling also reduces the effect of potential disorder, which is unimportant for the QAHE but detrimental for the QTME, which requires that the Fermi energy lie inside the gap at all positions.
description: 5 pages, 4 figures
Helmut Beumann, Theutonum nova metropolis. Studien zur Geschichte des Erzbistums Magdeburg in ottonischer Zeit
Creators: name: Schrage, Gertraud Eva
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 1 (2001)
Duchowieństwo kapitulne w Polsce średniowiecznej i wczesnonowożytnej. Studia nad pochodzeniem i funkcjonowaniem elity kościelnej
Creators: name: Wünsch, Thomas
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 3 (2001)
Grzegorz Hryciuk, "Kumityt". Polski Komitet Opiekuńczy Lwów Miasto w latach 1941-1944
Creators: name: Jockheck, Lars
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2002

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 51 Nr. 2 (2002)
The rapid decline of the prompt emission in Gamma-Ray Bursts
Creators: name: Dado, Shlomo
name: Dar, Arnon
name: De Rujula, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Many gamma ray bursts (GRBs) have been observed with the Burst-Alert and X-Ray telescopes of the Swift satellite. The successive `pulses' of these GRBs end with a fast decline and a fast spectral softening, until they are overtaken by another pulse, or the last pulse's decline is overtaken by a less rapidly-varying `afterglow'. The fast decline-phase has been attributed, in the currently-explored standard fireball model of GRBs, to `high-latitude' synchrotron emission from a collision of two conical shells. This high latitude emission does not explain the observed spectral softening. In contrast, the temporal behaviour and the spectral evolution during the fast-decline phase agree with the predictions of the cannonball model of GRBs.
description: Four added figures comparing the evolution of the inferred effective photon spectral index during the fast decline phase of the prompt emission in 14 selected Swift GRBS and the cannonball (CB) model prediction
Boltzmann equation for dissipative gases in homogeneous states with nonlinear friction
Creators: name: Trizac, E.
name: Barrat, A.
name: Ernst, M. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Combining analytical and numerical methods, we study within the framework of the homogeneous non-linear Boltzmann equation, a broad class of models relevant for the dynamics of dissipative fluids, including granular gases. We use the new method presented in a previous paper [J. Stat. Phys. 124, 549 (2006)] and extend our results to a different heating mechanism, namely a deterministic non-linear friction force. We derive analytically the high energy tail of the velocity distribution and compare the theoretical predictions with high precision numerical simulations. Stretched exponential forms are obtained when the non-equilibrium steady state is stable. We derive sub-leading corrections and emphasize their relevance. In marginal stability cases, power-law behaviors arise, with exponents obtained as the roots of transcendental equations. We also consider some simple BGK (Bhatnagar, Gross, Krook) models, driven by similar heating devices, to test the robustness of our predictions.
Fortschritte im Beitrittsprozeß der Staaten Ostmittel-, Ost- und Südosteuropas zur Europäischen Union. Regelungen und Konsequenzen für die deutschen Volksgruppen und Minderheiten
Creators: name: Zloch, Stephanie
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 1 (2001)
Dual superconformal symmetry of scattering amplitudes in N=4 super-Yang-Mills theory
Creators: name: Drummond, J. M.
name: Henn, J.
name: Korchemsky, G. P.
name: Sokatchev, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that the scattering amplitudes in the maximally supersymmetric N=4 super-Yang-Mills theory possess a new symmetry which extends the previously discovered dual conformal symmetry. To reveal this property we formulate the scattering amplitudes as functions in the appropriate dual superspace. Rewritten in this form, all tree-level MHV and next-to-MHV amplitudes exhibit manifest dual superconformal symmetry. We propose a new, compact and Lorentz covariant formula for the tree-level NMHV amplitudes for arbitrary numbers and types of external particles. The dual conformal symmetry is broken at loop level by infrared divergences. However, we provide evidence that the anomalous contribution to the MHV and NMHV superamplitudes is the same and, therefore, their ratio is a dual conformal invariant function. We identify this function by an explicit calculation of the six-particle amplitudes at one loop. We conjecture that these properties hold for all, MHV and non-MHV, superamplitudes in N=4 SYM both at weak and at strong coupling.
description: 58 pages
The Globular Cluster System of M60 (NGC 4649). I. CFHT MOS Spectroscopy and Database
Creators: name: Lee, Myung Gyoon
name: Hwang, Ho Seong
name: Park, Hong Soo
name: Park, Jang-Hyun
name: Kim, Sang Chul
name: Sohn, Young-Jong
name: Lee, Sang-Gak
name: Rey, Soo-Chang
name: Lee, Young-Wook
name: Kim, Ho-Il
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the measurement of radial velocities for globular clusters in M60, giant elliptical galaxy in the Virgo cluster. Target globular cluster candidates were selected using the Washington photometry based on the deep $16\arcmin \times 16\arcmin$ images taken at the KPNO 4m and using the $VI$ photometry derived from the HST/WFPC2 archive images. The spectra of the target objects were obtained using the Multi-Object Spectrograph (MOS) at the Canada-France-Hawaii Telescope (CFHT). We have measured the radial velocity for 111 objects in the field of M60: 93 globular clusters (72 blue globular clusters with $1.0\le(C-T_1)<1.7$ and 21 red globular clusters with $1.7\le(C-T_1)<2.4$), 11 foreground stars, 6 small galaxies, and the nucleus of M60. The measured velocities of the 93 globular clusters range from $\sim 500$ km s$^{-1}$ to $\sim 1600$ km s$^{-1}$, with a mean value of $1070_{-25}^{+27}$ km s$^{-1}$, which is in good agreement with the velocity of the nucleus of M60 ($v_{\rm gal}=1056$ km s$^{-1}$). Combining our results with data in the literature, we present a master catalog of radial velocities for 121 globular clusters in M60. The velocity dispersion of the globular clusters in the master catalog is found to be $234_{-14}^{+13}$ km s$^{-1}$ for the entire sample, $223_{-16}^{+13}$ km s$^{-1}$ for 83 blue globular clusters, and $258_{-31}^{+21}$ km s$^{-1}$ for 38 red globular clusters.
description: 29 pages, 8 figures. To appear in ApJ
Insect and disease risk factors in established interior spruce plantations
Creators: name: Cozens, Russel David
Publisher: name: University of British Columbia
Year: 2010

description: Forest insects and diseases active in immature interior spruce stands in the central interior of British Columbia and their possible implications in forest management practices have been surveyed. Collection records, spanning the period 1949 to 1982, from the Forest Insect and Disease Survey of the Canadian Forestry Service were reviewed for the Prince George Timber Supply Area and the pest incidence in immature interior spruce stands summarized. Twenty-two plantations, established between 1963 and 1973, were surveyed to determine the relative incidence of the major insect and pathogen pests of immature spruce in Supply Block 'G' of the Prince George Timber Supply Area. A bud midge, likely Rhabdophaga swainei Felt (Diptera: Cecidomyiidae), and a terminal weevil, Pissodes strobi Peck (Coleoptera: Curculionidae), were found to consistently infest and damage a significant number of immature interior spruce trees. A spruce stand stocking profile was developed as a basis for discussion of management practices in plantations and immature stands. The stocking profile can be used in the determination of not only pest management policy decisions but in stand management decisions affecting stand density and, ultimately, merchantable yield at harvest. The findings confirmed that forest management must be actively practiced throughout the life of a forest stand. To be successful, however, stand management guidelines and merchantable yield projections are required. These guidelines and projections must include the influences of insects and diseases upon the forest crop in their development model. This information is particularly important in the development of complete Timber Supply Area plans and for the flagging of pest hazard periods during the development of spruce forests.
Fermi pockets and correlation effects in underdoped YBa2Cu3O6.5
Creators: name: Elfimov, I. S.
name: Sawatzky, G. A.
name: Damascelli, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The detection of quantum oscillations in the electrical resistivity of YBa2Cu3O6.5 provides direct evidence for the existence of Fermi surface pockets in an underdoped cuprate. We present a theoretical study of the electronic structure of YBa2Cu3O7-d (YBCO) aiming at establishing the nature of these Fermi pockets, i.e. CuO2 plane versus CuO chain or BaO. We argue that electron correlation effects, such as orbital-dependent band distortions and highly anisotropic self-energy corrections, must be taken into account in order to properly interpret the quantum oscillation experiments.
description: A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/YBCO_OrthoII_LDA.pdf
A denial of identity. The Armenian genocidein the letters to the editor of The Times 1914-1926
Creators: name: Martini, Isabella
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: Genocide is the most violent denial of human identity, and it aims systematically to transform the societal organization of both victims and perpetrators. Considered the first among the genocides of the 20th century, the massacre of around 1.5 million Armenians has been denied official recognition by the Turkish government to date. Such denial has resisted not only international political pressure, but also evidence provided by news articles, editorials, and by letters to the editor documenting or referring to the massacre. Many letters to the editor of The Times mention the massacres that were later to be referred to as the Armenian genocide; the corpus analysed in this study includes those published closer to the events, between 1914 to 1926. Letters to the editor of a newspaper are selected for publication when their content fosters debate among the readers on topics which are particularly relevant for the newspaper’s agenda, and they have rarely been the target of linguistic analysis. This study examines the linguistic patterns used to represent the Armenian genocide at the time of the events, and how these patterns influence the perception of the Armenian identity via its representation through the letters to the editor. Concordance lines, collocations, clusters and extended co-textual references of keywords related to the Armenian national identity will be analysed using a corpus-assisted approach.
TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in its Atmosphere
Creators: name: Cabot, Samuel H. C.
name: Bello-Arufe, Aaron
name: Mendonça, João M.
name: Tronsgaard, René
name: Wong, Ian
name: Zhou, George
name: Buchhave, Lars A.
name: Fischer, Debra A.
name: Stassun, Keivan G.
name: Antoci, Victoria
name: Baker, David
name: Belinski, Alexander A.
name: Benneke, Björn
name: Bouma, Luke G.
name: Christiansen, Jessie L.
name: Collins, Karen A.
name: Goliguzova, Maria V.
name: Hagey, Simone
name: Jenkins, Jon M.
name: Jensen, Eric L. N.
name: Kidwell, Richard C.
name: Laloum, Didier
name: Massey, Bob
name: McLeod, Kim K.
name: Latham, David W.
name: Morgan, Edward H.
name: Ricker, George
name: Safonov, Boris S.
name: Schlieder, Joshua E.
name: Seager, Sara
name: Shporer, Avi
name: Smith, Jeffrey C.
name: Srdoc, Gregor
name: Strakhov, Ivan A.
name: Torres, Guillermo
name: Twicken, Joseph D.
name: Vanderspek, Roland
name: Vezie, Michael
name: Winn, Joshua N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the discovery of TOI-1518b -- an ultra-hot Jupiter orbiting a bright star $V = 8.95$. The transiting planet is confirmed using high-resolution optical transmission spectra from EXPRES. It is inflated, with $R_p = 1.875\pm0.053\,R_{\rm J}$, and exhibits several interesting properties, including a misaligned orbit (${240.34^{+0.93}_{-0.98}}$ degrees) and nearly grazing transit ($b =0.9036^{+0.0061}_{-0.0053}$). The planet orbits a fast-rotating F0 host star ($T_{\mathrm{eff}} \simeq 7300$ K) in 1.9 days and experiences intense irradiation. Notably, the TESS data show a clear secondary eclipse with a depth of $364\pm28$ ppm and a significant phase curve signal, from which we obtain a relative day-night planetary flux difference of roughly 320 ppm and a 5.2$σ$ detection of ellipsoidal distortion on the host star. Prompted by recent detections of atomic and ionized species in ultra-hot Jupiter atmospheres, we conduct an atmospheric cross-correlation analysis. We detect neutral iron (${5.2σ}$), at $K_p = 157^{+68}_{-44}$ km s$^{-1}$ and $V_{\rm sys} = -16^{+2}_{-4}$ km s$^{-1}$, adding another object to the small sample of highly irradiated gas-giant planets with Fe detections in transmission. Detections so far favor particularly inflated gas giants with radii $\gtrsim 1.78\,R_{\rm J}$; although this may be due to observational bias. With an equilibrium temperature of $T_{\rm eq}=2492\pm38$ K and a measured dayside brightness temperature of $3237\pm59$ K (assuming zero geometric albedo), TOI-1518b is a promising candidate for future emission spectroscopy to probe for a thermal inversion.
description: 25 pages, 11 figures, accepted to AJ
Consistency of spectral clustering
Creators: name: von Luxburg, Ulrike
name: Belkin, Mikhail
name: Bousquet, Olivier
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G20 (Primary) 05C50 (Secondary)

description: Consistency is a key property of all statistical procedures analyzing randomly sampled data. Surprisingly, despite decades of work, little is known about consistency of most clustering algorithms. In this paper we investigate consistency of the popular family of spectral clustering algorithms, which clusters the data with the help of eigenvectors of graph Laplacian matrices. We develop new methods to establish that, for increasing sample size, those eigenvectors converge to the eigenvectors of certain limit operators. As a result, we can prove that one of the two major classes of spectral clustering (normalized clustering) converges under very general conditions, while the other (unnormalized clustering) is only consistent under strong additional assumptions, which are not always satisfied in real data. We conclude that our analysis provides strong evidence for the superiority of normalized spectral clustering.
description: Published in at http://dx.doi.org/10.1214/009053607000000640 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Magnetohydrodynamic effect on first star formation: prestellar core collapse and protostar formation
Creators: name: Sadanari, Kenji Eric
name: Omukai, Kazuyuki
name: Sugimura, Kazuyuki
name: Matsumoto, Tomoaki
name: Tomida, Kengo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent theoretical studies have suggested that a magnetic field may play a crucial role in the first star formation in the universe. However, the influence of the magnetic field on the first star formation has yet to be understood well. In this study, we perform three-dimensional magnetohydrodynamic simulations taking into account all the relevant cooling processes and non-equilibrium chemical reactions up to the protostar density, in order to study the collapse of magnetized primordial gas cores with self-consistent thermal evolution. Our results show that the thermal evolution of the central core is hardly affected by a magnetic field, because magnetic forces do not prevent the contraction along the fields lines. We also find that the magnetic braking extracts the angular momentum from the core and suppresses fragmentation depending on the initial strength of the magnetic field. The angular momentum transport by the magnetic outflows is less effective than that by the magnetic braking because the outflows are launched only in a late phase of the collapse. Our results indicate that the magnetic effects become important for the field strength $B> 10^{-8}(n_{\rm H}/1\ \rm cm^{-3})^{2/3}\ \rm G$, where $n_{\rm H}$ is the number density, during the collapse phase. Finally, we compare our results with simulations using a barotropic approximation and confirm that this approximation is reasonable at least for the collapse phase. Nevertheless, self-consistent treatment of the thermal and chemical processes is essential for extending simulations to the accretion phase, in which radiative feedback by protostars plays a crucial role.
description: 18 pages, 15 figures, 2 tables. Accepted for publication in MNRAS
Quantum Information Effects
Creators: name: Heunen, Chris
name: Kaarsgaard, Robin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the two dual quantum information effects to manipulate the amount of information in quantum computation: hiding and allocation. The resulting type-and-effect system is fully expressive for irreversible quantum computing, including measurement. We provide universal categorical constructions that semantically interpret this arrow metalanguage with choice, starting with any rig groupoid interpreting the reversible base language. Several properties of quantum measurement follow in general, and we translate (noniterative) quantum flow charts into our language. The semantic constructions turn the category of unitaries between Hilbert spaces into the category of completely positive trace-preserving maps, and they turn the category of bijections between finite sets into the category of functions with chosen garbage. Thus they capture the fundamental theorems of classical and quantum reversible computing of Toffoli and Stinespring.
description: 27 pages, accepted for POPL 2022
DNA Nanotechnology Meets Nanophotonics
Creators: name: Liu, Na
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In the past decades, DNA has been intensely studied and exploited in different research areas of nanoscience and nanotechnology. At first glance, DNA-based nanophotonics seems to deviate quite far from the original goal of Nadrian Seeman, the founder of DNA nanotechnology, who hoped to organize biological entities using DNA in high-resolution crystals. As a matter of fact, DNA-based nanophotonics does closely follow his central spirit. That is, apart from being a genetic material for inheritance, DNA is also an ideal material for building molecular devices.
description: Viewpoint on DNA Nanotechnology Meets Nanophotonics
Decay properties of Roper resonance in the holographic QCD
Creators: name: Fujii, Daisuke
name: Hosaka, Atsushi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the one pion decay of the Roper resonance $N^*(1440)$$\to$$N$$π$ in the Sakai-Sugimoto model of the holographic QCD. The nucleon and Roper resonance emerge as ground and first excited states of the collective radial motion of the instanton in the four dimensional space with one extra dimension. It is found that the ratio of the $π$$NN^*$ and $π$$NN$ couplings, and hence the ratio of $g_A^{NN^*}$ and $g_A^{NN}$, is well reproduced in comparison with the experimental data. The mechanism of this result is due to the collective nature of excitations, which is very different from that of the single particle nature of the constituent quark model. Our results are obtained in the large-$N_c$ and large $λ$ ('t~Hooft coupling) limit which are useful to test how baryon resonances share what are expected in these limits.
description: 6 pages
Electric Dipole Moments in U(1)' Models
Creators: name: Hayreter, Alper
name: Sabanci, Asli
name: Solmaz, Levent
name: Solmaz, Saime
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study electric dipole moments (EDM) of electron and proton in E(6)--inspired supersymmetric models with an extra U(1) invariance. Compared to the Minimal Supersymmetric Standard Model (MSSM), in addition to offering a natural solution to the mu problem and predicting a larger mass for the lightest Higgs boson, these models are found to yield suppressed EDMs.
description: 24 pages, 9 figures, 1 table
Lyman Alpha Emitters and the 21cm Power Spectrum as Probes of Density-Ionization Correlation in the Epoch of Reionization
Creators: name: Pagano, Michael
name: Liu, Adrian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Due to the large cross section of Ly$α$ photons with hydrogen, Lyman Alpha Emitters (LAEs) are sensitive to the presence of neutral hydrogen in the intergalactic medium (IGM) during the Epoch of Reionization (EoR): the period in the Universe's history where neutral hydrogen in the IGM is ionized. The correlation of the ionized regions in the IGM with respect to the underlying intrinsic LAEs has a pronounced effect on the number of observed LAEs and their apparent clustering. As a result, observations of LAEs during the EoR can be used as a probe of the EoR morphology. Here we build on previous works where we parametrize the density-ionisation correlation during the EoR, and study how the observed number density and angular correlation function (ACF) of LAEs depends on this parametrization. Using Subaru measurements of the number density of LAEs and their ACF at z = 6.6, we place constraints on the EoR morphology. We find that measurements of LAEs at z = 6.6 alone cannot distinguish between different density-ionization models at $68\%$ credibility. However, adding information regarding the number density, and ACF, of LAEs at $z = 6.6$ to 21cm power spectrum measurements using the hydrogen Epoch of Reionization Array (HERA) at the midpoint of reionization can rule out uncorrelated and outside-in reionization at $99\%$ credibility.
description: 14 pages, 9 figures
La Gestión de Datos de Investigación en la Universidad TU Delft
Creators: name: Martinez-Lavanchy Paula, M.
Publisher: name: Zenodo
Year: 2019
Subjects: Gestión de Datos de Investigación
Ciencia Abierta
TUDelft
Plan de Gestión de Datos
Bibliotecas
Datos de Investigación

description: Presentación entregada dentro del marco de la serie de Mini Talleres Virtuales - Webinars del Proyecto LEARN organizados por la Biblioteca Hernán Santa Cruz, CEPAL, Naciones Unidas (Santiago, Chile).

Descripción del Mini Taller:

Desde 2014 la Universidad de Tecnología Delft ha venido desarrollando políticas y estrategias para la implementación de la Gestión de Datos de Investigación (GDI). En este Webinar tendremos la oportunidad de conocer la experiencia práctica llevada a cabo por esa Universidad. Podremos acercarnos a conocer los procesos en la generación de las políticas, estrategias, buenas prácticas, instrumentos y metodologías usadas; el desarrollo de infraestructura y la definición de roles y responsabilidades para una efectiva Gestión de Datos de Investigación.

Temario:

	Panorama e impulsores de GDI en Holanda – contexto
	TU Delft y Ciencia Abierta
	Componentes de la GDI en TU Delft: políticas, infraestructura y herramientas, y personas
Gertrud Pickhan, "Gegen den Strom". Der Allgemeine Jüdische Arbeiterbund "Bund" in Polen 1918-1939
Creators: name: Haumann, Heiko
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2002

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 51 Nr. 2 (2002)
From “British Subjects” to “American People”:Transformation of national identitiesin a corpus of American newspapers (1764-1783)
Creators: name: Cecconi, Elisabetta
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: This paper examines the way in which the British colonists of North America frame their national identity in the socio-political and judicial debates which are voiced in the press in the period before and after the Declaration of Independence. To this purpose, I constructed a corpus of newspaper articles from 1764 to 1783 and I analysed the most frequent descriptors used by authors to encode their national identity in discourse, focusing on recurrent collocational and colligational patterns. Results show that colonists adopt discourse strategies of assimilation, perpetuation and dismantling across the two decades. If until the mid-1770s they enhance their sameness with native Britons on the basis of their common cultural inheritance and historical memory, after 1776 colonists seek to construct an autochthonous American nationality. Although they appear to be neither able nor willing to see themselves as dis-membered from the British Empire, the years of the Revolution set the premises for the development of a post-British national identity.
Cry and facial behavior during induced pain in neonates
Creators: name: Grunau, Ruth Veronica Elizabeth
Publisher: name: University of British Columbia
Year: 2010

description: Pain behavior of neonates was compared across sleep/waking states and sex. From Gate-Control Theory (Melzack and Wall, 1982) it was hypothesized that pain behavior would vary depending on the ongoing functional state of the infant, in contrast with Specificity Theory (Mountcastle, 1980), from which one would expect neonatal pain expression to be solely a function of degree of tissue damage. The findings of facial action variation across sleep/waking state was interpreted as consistent with Gate-Control Theory. Awake alert infants responded with the most facial activity, which supported Brazelton's (1973) view that infants in this state are most receptive to environmental stimulation. Fundamental frequency of cry was not related to sleep/waking state. This suggested that findings from the cry literature on pain cry as a reflection of nervous system "stress", in unwell newborns, do not generalize directly to healthy infants under varying degrees of stress as a function of state. Sex differences were apparent in speed of response, with boys showing shorter time to cry and facial action following heel-lance. Issues raised by the study include the importance of using measurement techniques which are independent of pre-conceived categories of affective response, and the surprising degree of responsivity of the neonate to ongoing events. Exploratory analyses suggested obstetric factors were related to overall facial action. Caution was expressed in this interpretation due to the great complexity of the inter-relationships of medical, physiological and maternal variables which go far beyond the scope of this study. It was concluded that obstetric features such as mode of delivery should be considered in sample selection for neonatal pain studies, in contrast to current practise which has been to assume healthy newborns form an homogeneous population. It was clear from these findings that the issues are multifaceted, and the optimal way to proceed with research in the area of neonatal pain is with an interdisciplinary team format.
System parameters of three short period cataclysmic variable stars
Creators: name: Wild, J. F.
name: Littlefair, S. P.
name: Ashley, R. P.
name: Breedt, E.
name: Brown, A.
name: Dhillon, V. S.
name: Dyer, M. J.
name: Green, M. J.
name: Kerry, P.
name: Marsh, T. R.
name: Parsons, S. G.
name: Sahman, D. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using photometric ULTRACAM observations of three new short period cataclysmic variables, we model the primary eclipse lightcurves to extract the orbital separation, masses, and radii of their component stars. We find donor masses of 0.060 +/- 0.008 solar masses, 0.042 +/- 0.001 solar masses, and 0.042 +/- 0.004 solar masses, two being very low-mass sub-stellar donors, and one within 2 sigma of the hydrogen burning limit. All three of the new systems lie close to the modified, "optimal" model evolutionary sequence of Knigge et al. (2011). We briefly re-evaluate the long-standing discrepancy between observed donor mass and radius data, and theoretical CV evolutionary tracks. By looking at the difference in the observed period at each mass and the period predicted by the Knigge et al. (2011) evolutionary sequence, we qualitatively examine the form of excess angular momentum loss that is missing from the models below the period gap. We show indications that the excess angular momentum loss missing from CV models grows in importance relative to gravitational losses as the period decreases. Detailed CV evolutionary models are necessary to draw more quantitative conclusions in the future.
description: 17 pages, 14 figures, 5 tables
The Globular Cluster System of M60 (NGC 4649). II. Kinematics of the Globular Cluster System
Creators: name: Hwang, Ho Seong
name: Lee, Myung Gyoon
name: Park, Hong Soo
name: Kim, Sang Chul
name: Park, Jang-Hyun
name: Sohn, Young-Jong
name: Lee, Sang-Gak
name: Rey, Soo-Chang
name: Lee, Young-Wook
name: Kim, Ho-Il
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a kinematic analysis of the globular cluster (GC) system in the giant elliptical galaxy (gE) M60 in the Virgo cluster. Using the photometric and spectroscopic database of 121 GCs (83 blue GCs and 38 red GCs), we have investigated the kinematics of the GC system. We have found that the M60 GC system shows a significant overall rotation. The rotation amplitude of the blue GCs is slightly smaller than or similar to that of the red GCs, and their angles of rotation axes are similar. The velocity dispersions about the mean velocity and about the best fit rotation curve for the red GCs are marginally larger than those for the blue GCs. Comparison of observed stellar and GC velocity dispersion profiles with those calculated from the stellar mass profile shows that the mass-to-light ratio should be increased as the galactocentric distance increases, indicating the existence of an extended dark matter halo. The entire sample of GCs in M60 is found to have a tangentially biased velocity ellipsoid unlike the GC systems in other gEs. Two subsamples appear to have different velocity ellipsoids. The blue GC system has a modest tangentially biased velocity ellipsoid, while the red GC system has a modest radially biased or an isotropic velocity ellipsoid. From the comparison of the kinematic properties of the M60 GC system to those of other gEs (M87, M49, NGC 1399, NGC 5128, and NGC 4636), it is found that the velocity dispersion of the blue GC system is similar to or larger than that of the red GC system except for M60, and the rotation of the GC system is not negligible. The entire sample of each GC system shows an isotropic velocity ellipsoid except for M60, while the subsamples show diverse velocity ellipsoids. We discuss the implication of these results for the formation models of the GC system in gEs.
description: 48 pages, 16 figures. To appear in ApJ
Historische Pläne und Grundrisse von Städten und Ortschaften in Polen. Ein deutsch-polnischer Katalog
Creators: name: Kreft, Wolfgang
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 3 (2001)
From The Magnificent Seven to The Hateful Eight: Labels, lyrics and (group) identity constructionin Western movie songs
Creators: name: Dossena, Marina
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: This study, part of a larger project on the role of popular culture in language change and stabilization, takes a historical sociolinguistic approach to a small, specially-compiled corpus of (mostly mid-twentieth-century) songs featuring as theme tunes in Western films, in order to study what linguistic mechanisms are at work for the construction and reinforcement of (group) identities. Such identities pertain both to the protagonists of the films themselves and – albeit indirectly – to their viewers, whose empathy and emotive participation in the fictional events is elicited. Although the strategies on the basis of which these identities are created are historically situated, the patterns they establish may be shown to have had a lasting impact on later phenomena, such as those pertaining to the tourist industry. Typically, the memorability of the songs enables potentially obsolete views to maintain a certain degree of viability even among twenty-first-century audiences: as a result, identities acquire time depth and remain recognizable across decades spanning almost a century.
Knowledge, attitudes and practices to hepatitis B among South African primary healthcare staff
Creators: name: Mashilo, Atlegang
name: Mompati, Itumeleng
name: Ramakatane, Refilwe
name: Sebitloane, Didintle
name: Sibi, Naledi
name: Matthews, Philippa C
name: Van Rooyen, Cornel
name: Goedhals, Dominique
name: Vawda, Sabeehah
Publisher: name: The Francis Crick Institute
Year: 2025
Subjects: classificationCode: Infectious Disease
subject: Infectious Disease
classificationCode: Immunology
subject: Immunology
subject: FOS: Clinical medicine
classificationCode: Genetics & Genomics
subject: Genetics & Genomics

description: Background: Hepatitis B virus (HBV), a significant cause of liver disease globally, is recognised as a 2030 elimination target by the World Health Organization (WHO). Healthcare workers (HCWs) require appropriate HBV knowledge to identify, manage and prevent HBV.
Aim: We investigated the knowledge, attitude and practices (KAP) pertaining to HBV among HCWs to establish insights into awareness and inform the delivery of training.
Setting: The study was conducted among HCWs of 18 primary healthcare facilities in Bloemfontein, Free State province, South Africa.
Methods: Data were collected via anonymous, self-applied, 28-question-questionnaires in English. Data were captured on a Microsoft Excel spreadsheet and analysed by a biostatistician, using Statistical Analyses Software (SAS 9.4).
Results: The response rate was 88% (88/100), and median participant age was 44 years. Participants were mostly female (83%), professional nurses (65%) with more than 8 years of experience (60%). Median scores were 83% for epidemiology and transmission, 50% for clinical picture, 44% for laboratory diagnosis, 40% for management and 40% for prevention. No difference was noted based on number of years of experience.
Conclusion: Considerable gaps in KAP to HBV were noted among primary HCWs in Bloemfontein. Larger studies are needed to ascertain the KAP towards HBV among South African HCWs, to identify areas for enhanced training.
Contribution: Hepatitis B virus, an important cause of liver disease in Africa, is poorly identified and managed. Our study highlights the need to strengthen HCW education to ensure individuals are appropriately diagnosed, managed and educated on preventative measures, to reduce the burden of disease.