cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wide radio beams from gamma-ray pulsars
Creators: name: Ravi, V.
name: Manchester, R. N.
name: Hobbs, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the radio and gamma-ray beaming properties of normal and millisecond pulsars by selecting two samples from the known populations. The first, Sample G, contains pulsars which are detectable in blind searches of gamma-ray data from the Fermi Large Area Telescope. The second, Sample R, contains pulsars detectable in blind radio searches which have spin-down luminosities Edot > 10^{34} erg/s. We analyse the fraction of the gamma-ray-selected Sample G which have detectable radio pulses and the fraction of the radio-selected Sample R which have detectable gamma-ray pulses. Twenty of our 35 Sample G pulsars have already observed radio pulses. This rules out low-altitude polar-cap beaming models if, as is currently believed, gamma-ray beams are generated in the outer magnetosphere and are very wide. We further find that, for the highest-Edot pulsars, the radio and gamma-ray beams have comparable beaming factors, i.e., the beams cover similar regions of the sky as the star rotates. For lower-Edot gamma-ray emitting pulsars, the radio beams have about half of the gamma-ray sky coverage. These results suggest that, for high-Edot young and millisecond pulsars, the radio emission originates in wide beams from regions high in the pulsar magnetosphere, probably close to the null-charge surface and to the gamma-ray emitting regions. Furthermore, it suggests that for these high-Edot pulsars, as in the gamma-ray case, features in the radio profile represent caustics in the emission beam pattern.
description: 5 pages, 2 figures. In press, ApJ Letters
The key role of hazard indices and hotspot in disaster risk management: the case study of Napoli and Pozzuoli municipalities (Southern Italy)
Creators: name: Totaro, Federica
name: Alberico, Ines
name: Di Martire, Diego
name: Nunziata, Concettina
name: Petrosino, Paola
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology

description: In the last years, metropolitan areas are more and more exposed to natural risks often intensified by the effects of climatic changes. Clear and complete information about hazards impending on the territory is indispensable for local authorities to define efficient territorial management strategies focused on the risk reduction. A flexible hazard tool which works at different scale and with several sources of hazard is here proposed. We drew maps of monothematic and synthetic indices to describe the hazard status of metropolitan areas. A hazard hotspot map was also elaborated to identify both the areas with high hazard for the single dangerous event and the areas characterized by the concomitance of several hazards. We computed hazard indices for Napoli and Pozzuoli, a densely populated area, located in the Somma-Vesuvio and Campi Flegrei multi-source volcanic zone and also exposed to landslide, flood and coastal erosion hazard.
On the influence of opacity variation on spatial structure of radiative shocks
Creators: name: Busquet, M.
name: Klapisch, M.
name: Thais, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We provide a theoretical analysis of Radiative Shocks, defined as supercritical shocks accompanied by an ionization wave in front of the density jump. In particular, we look at the influence of opacity variation with temperature and photon energy on spatial structure of radiative shocks, with a view to understanding a split precursor feature observed in recent experiments. We show that multigroup processing, a more refined angular description and improved low temperature opacities are needed to explore the radiative precursor structure, at least in some temperature regimes where rapid change of ionization can be found.
A Spitzer Search For Planetary-Mass Brown Dwarfs With Circumstellar Disks: Candidate Selection
Creators: name: Harvey, Paul M.
name: Jaffe, Daniel T.
name: Allers, Katelyn
name: Liu, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on initial results from a Spitzer program to search for very low-mass brown dwarfs in Ophiuchus. This program is an extension of an earlier study by Allers et al. which had resulted in an extraordinary success rate, 18 confirmed out of 19 candidates. Their program combined near-infrared and Spitzer photom- etry to identify objects with very cool photospheres together with circumstellar disk emission to indicate youth. Our new program has obtained deep IRAC pho- tometry of a 0.5 deg2 field that was part of the original Allers et al. study. We report 18 new candidates whose luminosities extend down to 10-4 L\cdot which sug- gests masses down to ~ 2 MJ if confirmed. We describe our selection techniques, likely contamination issues, and follow-on photometry and spectroscopy that are in progress.
Geological Sheet Tehuacán 14Q-i-(10), Puebla and Oaxaca states, southern Mexico
Creators: name: Silva-Romo, Gilberto
name: Mendoza-Rosales, Claudia Cristina
name: Campos-Madrigal, Emiliano
name: Centeno-García, Elena
name: de la Rosa-Mora, Orestes Antonio
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: This work offers a large-scale approach to the stratigraphy of an area in southern Mexico that includes three different tectono-stratigraphic terranes and displays a great geological diversity. In the attached 1:100,000-scale geological map, the stratigraphic information is grouped according to the occurrence in sedimentary basins. Here, we describe the basement and six basins in turn. In four of the sedimentary basins, thick Mesozoic successions that accumulated on the basement record the evolution from a continental environment during the Triassic–Jurassic, to a marine environment, comprising clastic and calcareous deposits, during the early Cretaceous. Cenozoic ages are recorded in clastic and lacustrine sedimentary successions and in abundant igneous rocks in two of the continental basins. The geodatabase was compiled in GIS format and subsequently imported in vector graphic software to achieve a design similar to the cartographic series 1:100,000 CARTA GEOLÓGICA DE MÉXICO of the Instituto de Geología, UNAM.
The great trinomial hunt
Creators: name: Brent, Richard P.
name: Zimmermann, Paul
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.2.1; G.4
subject: 11-04 (Primary), 11B83 (Secondary)

description: We describe a search for primitive trinomials of high degree and its interaction with the Great Internet Mersenne prime search (GIMPS). The search is complete for trinomials whose degree is the exponent of a Mersenne prime, for all 47 currently known Mersenne primes.
description: 16 pages. For further details see http://wwwmaths.anu.edu.au/~brent/pub/pub235.html
Transverse component of the magnetic field in the solar photosphere observed by Sunrise
Creators: name: Danilovic, S.
name: Beeck, B.
name: Pietarila, A.
name: Schuessler, M.
name: Solanki, S. K.
name: Pillet, V. Martinez
name: Bonet, J. A.
name: Iniesta, J. C. del Toro
name: Domingo, V.
name: Barthol, P.
name: Berkefeld, T.
name: Gandorfer, A.
name: Knoelker, M.
name: Schmidt, W.
name: Title, A. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first observations of the transverse component of photospheric magnetic field acquired by the imaging magnetograph Sunrise/IMaX. Using an automated detection method, we obtain statistical properties of 4536 features with significant linear polarization signal. Their rate of occurrence is 1-2 orders of magnitude larger than values reported by previous studies. We show that these features have no characteristic size or lifetime. They appear preferentially at granule boundaries with most of them being caught in downflow lanes at some point in their evolution. Only a small percentage are entirely and constantly embedded in upflows (16%) or downflows (8%).
description: Accepted for the Sunrise Special Issue of ApJL
Magnetic anomalies of the NW Iberian continental margin and the adjacent abyssal plains
Creators: name: Druet, María
name: Catalán, Manuel
name: Martín-Dávila, José
name: Martos, Yasmina M.
name: Muñoz-Martín, Alfonso
name: Granja-Bruña, José Luis
name: Maestro, Adolfo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Inorganic Chemistry
subject: Science Policy

description: The NW Iberian margin is a hyperextended continental margin, formed during the opening of the North Atlantic Ocean, where a subsequent partial tectonic inversion has undergone during the Alpine Orogeny. This succession of tectonic episodes determines the magnetic signature of the margin. The Spanish Exclusive Economic Zone Project has carried out seven one-month cruises between 2001 and 2009. To extend and densify the spatial coverage, we have used data from the World Digital Magnetic Anomaly Map. Here, we describe the methodology used for the acquisition and data processing of the magnetic field data. The use of diverse instrumentation, a non-complete external field’s cancelation, and the use of different magnetic core field models, contributed to the total error budget. To reduce it, we have used a leveling algorithm which minimizes all these contributions. Finally, a statistical analysis was applied using crossover residuals, showing a resolution better than 28 nT.
Tunable dipolar resonances and Einstein-de Haas effect in a Rb-87 atoms condensate
Creators: name: Swislocki, Tomasz
name: Sowinski, Tomasz
name: Pietraszewicz, Joanna
name: Brewczyk, Miroslaw
name: Lewenstein, Maciej
name: Zakrzewski, Jakub
name: Gajda, Mariusz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study a spinor condensate of Rb-87 atoms in F = 1 hyperfine state confined in an optical dipole trap. Putting initially all atoms in mF = 1 component we observe a significant transfer of atoms to other, initially empty Zeeman states exclusively due to dipolar forces. Because of conservation of a total angular momentum the atoms going to other Zeeman components acquire an orbital angular momentum and circulate around the center of the trap. This is a realization of Einstein-de Haas effect in a system of cold gases. We show that the transfer of atoms via dipolar interaction is possible only when the energies of the initial and the final sates are equal. This condition can be fulfilled utilizing a resonant external magnetic field, which tunes energies of involved states via the linear Zeeman effect. We found that there are many final states of different spatial density which can be tuned selectively to the initial state. We show a simple model explaining high selectivity and controllability of weak dipolar interactions in the condensate of Rb-87 atoms.
description: 10 pages, 8 figures
New State of Binding of Antiprotons in Atoms
Creators: name: Richter, Klaus
name: Rost, J.
name: Thürwächter, R.
name: Briggs, J.
name: Wintgen, Dieter
name: Solov'ev, E.
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 530 Physik
subject: 36.10.-k
subject: 31.10.+z

description: It is suggested that there exists a novel ''molecular'' state of binding of antiprotons to atoms in which an excited highly polarized electron is located between the nucleus and the antiproton. The lifetime of this state is expected to be decided by the radiative lifetime of the excited electronic state.
$γ_{o}$-Compacr $γ^{s}$-Regular and $γ^{s}$-Normal Spaces
Creators: name: Ahmad, Bashir
name: Hussain, Sabir
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: (2000) subject classification. Primary 54A05, 54A10, 54D10

description: We define and study the properties of $γ^{*}$-regular and $γ$-normal spaces. We also continue studying $γ_{o}$-compact spaces defined in [5].
description: This paper have been published in Canadian Journal of Pure and Applied Sciences in 2008
On the Origin of Ultraviolet Emission and the Accretion Model of Low-luminosity AGNs
Creators: name: Yu, Zhaolong
name: Yuan, Feng
name: Ho, Luis
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Low-luminosity active galactic nuclei (LLAGNs) are generally believed to be powered by an inner radiatively inefficient, advection-dominated accretion flow (ADAF), an outer truncated thin disk, and a jet. Maoz (2007) recently challenged this picture based on the observation that the strength of ultraviolet emission relative to the X-ray and radio bands does not depart from empirical trends defined by more luminous sources. He advocates that AGNs across all luminosities have essentially the same accretion and radiative processes, which in luminous sources are described by a standard optically thick, geometrically thin disk. We calculate ADAF models and demonstrate that they can successfully fit the observed spectral energy distributions of the LLAGNs in Maoz's sample. Our model naturally accommodates the radio and X-ray emission, and the ultraviolet flux is well explained by a combination of the first-order Compton scattering in the ADAF, synchrotron emission in the jet, and black body emission in the truncated thin disk. It is premature to dismiss the ADAF model for LLAGNs. The UV data can be fit equally well using a standard thin disk, but an additional corona and jet would be required to account for the X-ray and radio emission. We argue that there are strong theoretical reasons to prefer the ADAF model over the thin disk scenario. We discuss testable predictions that can potentially discriminate between the two accretion models.
description: 20 pages, 3 figures; ApJ in press
The Quaternary landforms of the Büyük Menderes Graben System: the southern Menderes Massif, western Anatolia, Turkey
Creators: name: Özpolat, Emrah
name: Yıldırım, Cengiz
name: Görüm, Tolga
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: Computational Biology

description: We present the first detailed Quaternary landform map of the Büyük Menderes Graben System, located in western Turkey which is one of the most active extensional domains in the world. The main map was produced with a combination of TanDEM-X (12.5 m resolution), Red Relief Image Map, unmanned aerial vehicle, Google Earth images, and multiple fieldworks. The main map is presented at a scale of 1:160,000 although landforms were mapped at a scale of 1:15,000. The ten Quaternary landforms were defined considering their surface morphology and depositional environment. The alluvial fans, river terraces, and floodplains are the most common landforms. The spatial pattern of the alluvial fans and river terraces showed the variable rates of tectonics and surface processes along the strike of the graben system. The distribution of the meander cut-offs and paleo-shorelines imply that Büyük Menderes Graben System is vulnerable to geohazards like flash-flood sedimentation and flood events.
On Charmless $B\to K_hη^{(')}$ Decays with $K_h=K,K^*,K_0^*(1430),K_2^*(1430)$
Creators: name: Cheng, Hai-Yang
name: Chua, Chun-Khiang
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the charmless decays $B\to K_hη$ and $B\to K_hη'$ within the framework of QCD factorization (QCDF) for $K_h= K,K^*,K_0^*(1430)$ and naive factorization for $K_h=K_2^*(1430)$. There are three distinct types of penguin contributions: (i) $b\to sq\bar q\to sη_{q}$, (ii) $b\to ss\bar s\to sη_s$, and (iii) $b\to s q\bar q\to q \bar K_h$, where $η_q=(u\bar u+d\bar d)/\sqrt{2}$ and $η_s=s\bar s$. $B\to K^{(*)}η^{(')}$ decays are dominated by type-II and type-III penguin contributions. The interference, constructive for $Kη'$ and $K^*η$ and destructive for $Kη$ and $K^*η'$, between type-II and type-III diagrams explains the pattern of $Γ(B\to Kη')\ggΓ(B\to Kη)$ and $Γ(B\to K^*η')\llΓ(B\to K^*η)$. Within QCDF, the observed large rate of the $Kη'$ mode can be naturally explained without invoking flavor-singlet contributions or something exotic. The decay pattern for $B\to K_0^*(1430)η^{(')}$ decays depends on whether the scalar meson $K_0^*(1430)$ is an excited state of $κ$ or a lowest-lying $P$-wave $q\bar q$ state. Hence, the experimental measurements of $B\to K_0^*(1430)η^{(')}$ can be used to explore the quark structure of $K_0^*(1430)$. If $K_0^*(1430)$ is a low-lying $q\bar q$ bound state, we find that $K_0^*η$ has a rate slightly larger than $K_0^*η'$ owing to the fact that the $η$-$η'$ mixing angle in the $η_q,η_s$ flavor basis is less than $45^\circ$, in agreement with experiment. Type-III penguin diagram does not contribute to $B\to K_2^*η^{(')}$ under the factorization hypothesis and type-II diagram dominates.
description: 18 pages, 1 figure
Geomorphology of fluvial deposits in the middle Tocantins River, eastern Amazon
Creators: name: de Jesus, Jandessa Silva
name: Pupim, Fabiano do Nascimento
name: Sawakuchi, André Oliveira
name: Felipe, Leonardo Brasil
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified

description: This paper presents the geomorphological mapping at a 1:100,000 scale of fluvial deposits in the middle Tocantins River. The region preserves an important sedimentary archive of environmental changes of the Amazon and Cerrado biomes. Yet, the region is under influence of diverse anthropogenic activities, including planned or operational hydropower plants, and detailed geomorphological mapping is lacking. The mapping combined interpretation of surface geomorphic features, morphometric analysis, and field surveys. Three main geomorphic units were defined: (i) fluvial plain, (ii) fluvial terraces, and (iii) paleo-alluvial fans. The detailed mapping survey allowed a hierarchical organization of geomorphological units as well as their relative chronology of formation. Our results improve the understanding on the complex geomorphological processes which shape the current fluvial landscape. Specifically, improving the understanding of the Tocantins River floodplains is crucial to support conservation of flooded forests, sustainable use of natural resources and minimize socio-economic losses and damages.
Modeling the broadband persistent emission of magnetars
Creators: name: Zane, Silvia
name: Turolla, Roberto
name: Nobili, Luciano
name: Rea, Nanda
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper, we discuss our first attempts to model the broadband persistent emission of magnetars within a self consistent, physical scenario. We present the predictions of a synthetic model that we calculated with a new Monte Carlo 3-D radiative code. The basic idea is that soft thermal photons (e.g. emitted by the star surface) can experience resonant cyclotron upscattering by a population of relativistic electrons threated in the twisted magnetosphere. Our code is specifically tailored to work in the ultra-magnetized regime; polarization and QED effects are consistently accounted for, as well different configurations for the magnetosphere. We discuss the predicted spectral properties in the 0.1-1000 keV range, the polarization properties, and we present the model application to a sample of magnetars soft X-ray spectra.
description: 14 pages, 7 figures, to be published in Advances in Space Research. Proceedings of the conference "Frontieres of Space Astrophysics, Neutron Stars & Gamma Ray Bursts", Cairo/Alexandria, 30 March- 4 April 2009
Minimal clones generated by majority operations
Creators: name: Waldhauser, Tamás
Publisher: name: arXiv
Year: 2011
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 08A40

description: We determine all majority operations on a four-element set that generate a minimal clone.
description: 9 pages
Magnetotransport in Antidot Arrays
Creators: name: Weiss, Dieter
name: Richter, Klaus
name: Vasiliadou, E.
name: Lütjering, Gerd
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: 530 Physik

description: We study magnetotransport in lateral two- dimensional superlattices with periods on the order of 100 nm. Pronounced low-field transport anomalies reflect the interplay of two characteristic lengths of the system, the cyclotron radius {\it R$_{c}$} and the period {\it a}. Measurements at very low temperatures reveal quantum oscillations, periodic in the magnetic field {\it B}, which are superimposed upon the commensurability anomalies in the magnetoresistance {\it p$_{xx}$}. We show that the latter effect can be interpreted in terms of quantized periodic orbits which takes into account the chaotic nature of the classical phase space.
Was LeBron James “the uneducated one in this situation”? Analyzing Western domestic talking points on the 2019 Hong Free Speech protests
Creators: name: Rowe, Evan
name: Gondwe, Gregory
Publisher: name: figshare
Year: 2022
Subjects: subject: 200101 Communication Studies
subject: FOS: Media and communications

description: Western Media portrayals of the 2019 Hong Kong protests leave out key and important historical and cultural contextual information. While western newspapers portrayed a narrative of the Hong Kong protests as centered around “free speech”, it left out the colonial legacy of Hong Kong, and subsequent cultural divisions promoted by the Hong Kong elite, as a means to focus a constrained population against “mainlanders” instead of against the wealthy Hong Kong elite. This paper analyzes and contextualizes western news narratives about the protests and the lens of the NBA being portrayed as ‘cowing’ to China, and adds historical context that is absent from the discussion.
Cooperatives: A Housing Alternative for Rural America
Creators: name: Kennedy, Tracey
name: Jermolowicz, Andrew
name: Lambert, Mary Ann
name: Reilly, John
name: Rotan, Beverly
name: Kennedy, Tracey
name: Jermolowicz, Andrew
name: Lambert, Mary Ann
name: Reilly, John
name: Rotan, Beverly
Publisher: name: Unknown
Year: 1995
Subjects: subject: Community/Rural/Urban Development
subject: Institutional and Behavioral Economics
subject: cooperative
subject: housing cooperative

description: In a housing cooperative, people join to form a cooperative corporation that owns the buildings in which they live. Purchasing a share in the cooperative entitles each member to lease and occupy a dwelling unit from the cooperative and to participate in its operation. Each member pays a share of the cooperative’s monthly expenses. Housing cooperatives are democratically controlled, meaning that each member has one vote in deciding the affairs of the cooperative. Housing cooperatives offer affordability, a sense of empowerment in that residents have control of their own living situations, and the permanence and stability that comes with home ownership. The basic steps involved in organizing a housing cooperative may occur in a different order or even simultaneously, depending on the project. No matter what the project, the process involves identifying needs, measuring interest, determining financial feasibility, and incorporating as a legal organization.
The two metallicity groups of the globular cluster M22: a chemical perspective
Creators: name: Marino, A. F.
name: Sneden, C.
name: Kraft, R. P.
name: Wallerstein, G.
name: Norris, J. E.
name: Da Costa, G.
name: Milone, A. P.
name: Ivans, I. I.
name: Gonzalez, G.
name: Fulbright, J. P.
name: Hilker, M.
name: Piotto, G.
name: Zoccali, M.
name: Stetson, P. B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a detailed chemical composition analysis of 35 red giant stars in the globular cluster M22. High resolution spectra for this study were obtained at five observatories, and analyzed in a uniform manner. We have determined abundances of representative light proton-capture, alpha, Fe-peak and neutron-capture element groups. Our aim is to better understand the peculiar chemical enrichment history of this cluster, in which two stellar groups are characterized by a different content in iron, neutron capture elements Y, Zr and Ba, and alpha element Ca. The principal results of this study are: (i) substantial star-to-star metallicity scatter (-2.0
description: 26 pages, 19 figures. Accepted for publication in A&A
Holstein magneto-polarons: from Landau levels to Hofstadter butterflies
Creators: name: Berciu, Mona
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the Holstein polaron in transverse magnetic field using non-perturbational methods. At strong fields and large coupling, we show that the polaron has a Hofstadter spectrum, however very distorted and of lower symmetry than that of a (heavier) bare particle. For weak magnetic fields, we identify non-perturbational behaviour of the Landau levels not previously known.
description: 4 pages, 4 figures
Lattice QCD and Hydro/Cascade Model of Heavy Ion Collisions
Creators: name: Cheng, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report here on a recent lattice study of the QCD transition region at finite temperature and zero chemical potential using domain wall fermions (DWF). We also present a parameterization of the QCD equation of state obtained from lattice QCD that is suitable for use in hydrodynamics studies of heavy ion collisions. Finally, we show preliminary results from a multi-stage hydrodynamics/hadron cascade model of a heavy ion collision, in an attempt to understand how well the experimental data (e.g. particle spectra, elliptic flow, and HBT radii) can constrain the inputs (e.g. initial temperature, freezeout temperature, shear viscosity, equation of state) of the theoretical model.
description: 10 pages, 12 figures. Proceedings for the 26th Winter Workshop on Nuclear Dynamics, Ocho Rios, Jamaica, Jan 2-9, 2010
Analysis of the paraglacial landscape in the Ny-Ålesund area and Blomstrandøya (Kongsfjorden, Svalbard, Norway)
Creators: name: Berthling, Ivar
name: Berti, Claudio
name: Mancinelli, Vania
name: Stendardi, Laura
name: Piacentini, Tommaso
name: Miccadei, Enrico
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Ice cover changes have affected the Svalbard Islands during the Quaternary and conditioned a complex paraglacial landscape. In these remote and poorly vegetated arctic areas, the integration of field investigations and analysis of aerial images and DTMs or terrestrial laser scanning, is effective in the understanding landscape features and changes. In this work, we present the results of a geomorphological investigation and mapping in two sites along the Kongsfjorden in NW Svalbard (Ny-Ålesund and Blomstrandøya). A specific analysis focused on the slope landforms along the rock slopes. The study is based on fieldwork that defined deposits and landforms distribution of areas with different bedrock and geomorphological context. The analysis of the rock slopes focused on weathering and erosion processes, estimating erosion rates of 0.15–0.37 mm/yr over the Holocene, consistent with other areas around the Kongsfjorden and close to the highest values found in arctic areas.
Forces between static-light mesons
Creators: name: Wagner, Marc
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The isospin, spin and parity dependent potential of a pair of static-light mesons is computed using Wilson twisted mass lattice QCD with two flavors of degenerate dynamical quarks. From the results a simple rule can be deduced stating, which isospin, spin and parity combinations correspond to attractive and which to repulsive forces.
description: 7 pages, 2 figures, talk given at the XXVIII International Symposium on Lattice Field Theory (Lattice 2010), June 14-19 2010, Villasimius, Italy
Cell motility: a viscous fingering analysis of active gels
Creators: name: Amar, M. Ben
name: Manyuhina, O. V.
name: Napoli, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The symmetry breaking of the actin network from radial to longitudinal symmetry has been identified as the major mechanism for keratocytes (fish cells) motility on solid substrate. For strong friction coefficient, the two dimensional actin flow which includes the polymerisation at the edge and depolymerisation in the bulk can be modelled as a Darcy flow, the cell shape and dynamics being then modelled by standard complex analysis methods. We use the theory of active gels to describe the orientational order of the filaments which varies from the border to the bulk. We show analytically that the reorganisation of the cortex is enough to explain the motility of the cell and find the velocity as a function of the orientation order parameter in the bulk.
description: 15 pages, 4 figures, accepted for publication in EPJ - Plus
Multidimensional p-adic wavelets for the deformed metric
Creators: name: Albeverio, S.
name: Kozyrev, S. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: The approach to p-adic wavelet theory from the point of view of representation theory is discussed. p-Adic wavelet frames can be constructed as orbits of some p-adic groups of transformations. These groups are automorphisms of the tree of balls in the p-adic space. In the present paper we consider deformations of the standard p-adic metric in many dimensions and construct some corresponding groups of transformations. We build several examples of p-adic wavelet bases. We show that the constructed wavelets are eigenvectors of some pseudodifferential operators.
Geomorphology of Horseshoe Island, Marguerite Bay, Antarctica
Creators: name: Yıldırım, Cengiz
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Here, a geomorphological map of Horseshoe Island, which is one of the most ice-free islands in Marguerite Bay of the Antarctic Peninsula, is provided. The landforms on the island were mapped by using Google Earth images. Field reconnaissance of the landforms was carried out in March 2018. The island is subdivided into three major geomorphologically different sectors. The northern sector is mostly covered by a remnant of a non-erosive ice cap and has limited glacial landforms and deposits. The central sector is rich in terms of glacial and periglacial landforms and deposits. Glaciers are still sculpting the southern sector and it has extensive features of glacial erosion and deposition. The most common landforms on the island are talus cones, moraines, patterned ground, and raised beaches. The geomorphological map of the island will be a useful base for further geomorphic and/or glaciologic research in this climate-sensitive region.
On the Nature of the HII Regions in the Extended Ultraviolet Disc of NGC 4625
Creators: name: Goddard, Q. E.
name: Bresolin, F.
name: Kennicutt, R. C.
name: Ryan-Weber, E. V.
name: Rosales-Ortega, F. F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using deep Subaru/FOCAS spectra of 34 HII regions in both the inner and outer parts of the extended ultraviolet (XUV) disc galaxy NGC 4625 we have measured an abundance gradient out to almost 2.5 times the optical isophotal radius. We applied several strong line abundance calibrations to determine the HII region abundances, including R23, [NII]/[OII], [NII]/Ha as well as the [OIII]4363 auroral line, which we detected in three of the HII regions. We find that at the transition between the inner and outer disc the abundance gradient becomes flatter. In addition, there appears to be an abundance discontinuity in proximity of this transition. Several of our target HII regions appear to deviate from the ionisation sequence defined in the [NII]/Ha vs. [OIII]/Hb diagnostic diagram by bright extragalactic HII regions. Using theoretical models we conclude that the most likely explanations for these deviations are either related to the time evolution of the HII regions, or stochastic variations in the ionising stellar populations of these low mass HII regions, although we are unable to distinguish between these two effects. Such effects can also impact on the reliability of the strong line abundance determinations.
description: 14 pages, 8 figures, accepted for publication in MNRAS
Asymmetric transmission of linearly polarized light at optical metamaterials
Creators: name: Menzel, C.
name: Helgert, C.
name: Rockstuhl, C.
name: Kley, E. -B.
name: Tünnermann, A.
name: Pertsch, T.
name: Lederer, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We experimentally demonstrate a three-dimensional chiral optical metamaterial that exhibits an asymmetric transmission for forwardly and backwardly propagating linearly polarized light. The observation of this novel effect requires a metamaterial composed of three-dimensional chiral metaatoms without any rotational symmetry. Our analysis is supported by a systematic investigation of the transmission matrices for arbitrarily complex, lossy media that allows deriving a simple criterion for asymmetric transmission in an arbitrary polarization base. Contrary to physical intuition, in general the polarization eigenstates in such three-dimensional and low-symmetry metamaterials do not obey fxed relations and the associated transmission matrices cannot be symmetrized.
Formica santschii WHEELER 1913
Creators: name: Seifert, Bernhard
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Formica
Formica santschii

description: Formica santschii WHEELER, 1913 Formica rufa var. santschii WHEELER, 1913 [type investigation] Formica santschii is WHEELER (1913) ’s replacement name for F. rufa var. alpina SANTSCHI, 1911, which is a junior primary homonym of Formica adamsi var. alpina WHEELER, 1909. SANTSCHI (1911) described his F. rufa var. alpina from the Alps north of Sondrio. Investigated were two syntype workers on separate pins stored in NHM Basel and labelled in F. Santschi´s handwriting. The larger specimen with CW 1754 µm is depicted in AntWeb (ANTWEB 2021) under CASENT0912249 and is labelled “Valteline. Galli-Valerio”, “ Formica alpina € Sant.”, “type”. The smaller, damaged specimen with CW = 1685 µm on the other pin is labelled “Valteline. Galli-Valerio”, “ Formica alpina € Sant.” By morphology and geography, the F. santschii types could either belong to Formica lugubris or Formica paralugubris. The specimens were run as wild-cards in an LDA collecting 369 workers of the F. lugubris morphs A1 and A3 from the Alps in class 1, and 298 workers of F. paralugubris in class 2. The eleven characters available in the F. santschii types were CS, CL / CW 1750, SL / CS 1750, SL / Smax 1750, PeW / CS 1750, nSc 1750, nCH 1750, OccHL 1750, mPnHL 1750, nMet 1750, and MetHL 1750. With these data, the larger syntype worker was allocated to class 1 with p = 0.9674 but the smaller one with p = 0.9551 to class 2. It appears questionable if the two workers mounted on separate pins belong to the same nest sample. In order to save a stable nomenclature, a lectotype of F. santschii is fixed by present decision in the undamaged larger specimen labelled “CASENT0912249”.
description: Published as part of Seifert, Bernhard, 2021, A taxonomic revision of the Palaearctic members of the Formica rufa group (Hymenoptera: Formicidae) - the famous mound-building red wood ants, pp. 133-179 in Myrmecological News 31 on page 165, DOI: 10.25849/myrmecol.news_031:133, http://zenodo.org/record/5582216
description: {"references": ["WHEELER, W. M. 1913: A revision of the ants of the genus Formica (LINNE) MAYR. - Bulletin of the Museum of Comparative Zoology 53: 379 - 565.", "SANTSCHI, F. 1911: Une nouvelle variete de Formica rufa L. (Hym. Formicidae). - Bulletin de la Societe Entomologique de France 1911: 349 - 350.", "ANTWEB 2021: AntWeb Version 8.54. 4. - , retrieved on 15 January 2021."]}
Geomorphological and structural characterization of the ‘Canale di Pirro’ polje, Apulia (Southern Italy)
Creators: name: Pisano, L.
name: Zumpano, V.
name: Liso, I. S.
name: Parise, M.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: In this work, we present a geomorphological map of the ‘Canale di Pirro’ polje, located in the central part of Apulia region, Southern Italy, among the most interesting karst landforms in the Mediterranean Basin. This area is characterized by a remarkable underground system of caves, where the so-called ‘Inghiottitoio di Masseria Rotolo’ reaches a depth of 324 m, thus being the deepest known cave in Apulia. The polje is bounded on both sides by tectonically controlled ridges, showing an overall length of some 12 km. The map of the area is produced starting from the interpretation of aerial photographs, the integration of the digital elevation model analysis and field surveys, in order to obtain a correct distribution of landforms and fluvial processes. Furthermore, karst depressions, conical hills, erosional gullies, alluvial fans and tectonic structures have been also identified and reported in the map.
The IGS Infrastructure: Addressing the shifting user needs
Creators: name: Bradke, Markus
name: IGS Infrastructure Committee
Publisher: name: Zenodo
Year: 2022
Subjects: GNSS
IGS
Infrastructure
FAIR

description: To be able to address the shifting user needs of new users, the IGS infrastructure needs to undertake a modernisation process. This includes the enhancement of the tracking network with a strong focus on multi-GNSS and real-time capabilities. Furthermore, it is intended to build network resilience by supporting station operators from underrepresented regions and expanding capacity development resources. It is necessary to improve the resilience of the IT infrastructure by advocating the importance of information security. Additionally, the IGS infrastructure is planning to explore modern standards, data storage and access methodologies to improve the FAIRness of the IGS data and metadata.
Essays on international trade and labor mobility
Creators: name: Laptiev, Anton
Publisher: name: University of British Columbia
Year: 2018

description: This dissertation combines three empirical papers in International Trade and Labor Economics. The first chapter uses Ukrainian firm-level data to examine whether firms induced to import from the European Union by trade liberalization upgrade the quality of goods that they export. I use the instrumental variable regression to address the endogeneity of firms' import status. Obtained results confirm that new importers substantially improved the quality of products sold abroad. After splitting the sample into heterogeneous and homogeneous good producers, I found that the effect of importing is strong and statistically significant for the former and insignificant for the latter. The obtained results indicate that trade liberalization can lead to considerable quality improvement in industries with the large scope for quality differentiation. In the second chapter, I analyze patterns of employment adjustment using a rich panel of Ukrainian manufacturing firms. The data suggest that manufacturing plants operate under considerable firing costs imposed by the employment protection legislation. Moreover, I find that privatized enterprises, similarly to public firms, are more constraint in making their employment adjustment decisions than new private firms. I estimate a model of dynamic labor demand with a flexible adjustment cost function. Obtained results indicate the presence of substantial firing costs in Ukrainian manufacturing. These costs are considerably larger for public and privatized enterprises. The third chapter uses data from the Census, ACS and CPS to document that a large part of the long-run reallocation of labor from the goods to the service sector in the U.S. took place within narrowly defined groups of workers. In particular, sectoral reallocation reflects a labor market trend that is distinct from the automatization of the goods sector and the increase in female labor force participation. We use this result to empirically evaluate the central prediction of job-search theory with on-the-job search: that there is an intrinsic link between the earnings structure and the rates at which employed workers change jobs. We find robust evidence that the earnings distribution in the service sector became more dispersed relative to the goods sector when the rate at which workers flew into the service sector rose.
The Tachrift channel-levée turbidite complexes (Tortonian) of the Taza-Guercif basin (South Rifian Corridor, NE Morocco)
Creators: name: Felletti, Fabrizio
name: Marini, Mattia
name: Kati, Imad El
name: Tabyaoui, Hassan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: This contribution reports on the field mapping of 9 exceptionally well-exposed channel-levée complexes from Taza–Guercif Basin (NE Morocco), belonging to the Late Miocene Tachrift turbidite system. Separated from each another by hemipelagic marlstones, the mapped channel-levée complexes exhibit thicknesses in the range of 5–25 m. Four main sedimentary facies associations were mapped, including channel-fill sandstones, levée thin-bedded heterolithics, chaotic mass transport deposits, and hemipelagic marlstones. In addition, two end-member styles of channel-fills spatial stacking were recognized, reflecting different modes of channel belt development and/or location along the slope profile, namely: (a) a lateral-migration pattern, resulting from lateral migration of high-sinuosity levéed channel belts, as opposed to (b) a vertically stacked pattern, interpreted to reflect the vertical aggradation of levéed channel belts with a relatively low sinuosity. The geological map accompanying this contribution provides the basis for more in-depth sedimentological investigations on the channels of the Tachrift turbidite system.
Equilibration and symmetry breaking in vibrated granular systems
Creators: name: Brey, J. Javier
name: Khalil, Nagi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The steady states of two vibrated granular gases separated by an adiabatic piston are investigated. The system exhibits a non-equilibrium phase transition with an spontaneous symmetry breaking. Even if the gases at both sides of the piston have the same number of particles and are mechanically identical, their steady volumes and temperatures can be rather different. The transition can be explained by a simple kinetic theory model expressing mechanical equilibrium and the energy balance occurring in the system. The model predictions are in good agreement with molecular dynamics simulation results. The macroscopic description of the steady states is discussed, as well as some physical implications of the symmetry breaking.
description: 5 figures
Mass and radius estimation for the neutron star in X-ray burster 4U 1820-30
Creators: name: Kusmierek, K.
name: Madej, J.
name: Kuulkers, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a new method for determining masses and radii of neutron stars residing in thermo-nuclear X-ray burst sources. To illustrate this method we apply it to a burst from the source 4U 1820-30 recorded by the Rossi X-Ray Timing Explorer. Fits of the observed X-ray spectra to grids of Comptonised model atmospheres yield estimates for the mass and radius of the neutron star, M=1.3 \pm 0.6 M_sol and R=11^+3_-2 km, respectively.
description: MNRAS in print