cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Flash Mixing on the White Dwarf Cooling Curve: FUSE Observations of three He-rich sdB Stars
Creators: name: Lanz, Thierry
name: Brown, Thomas M.
name: Sweigart, Allen V.
name: Hubeny, Ivan
name: Landsman, Wayne B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present FUSE spectra of 3 He-rich sdB stars. Two of these stars, PG1544+488 and JL87, reveal extremely strong C III lines at 977 and 1176A, while the carbon lines are quite weak in the third star, LB1766. We have analyzed the FUSE data using TLUSTY NLTE line-blanketed model atmospheres, and find that PG1544+488 has a surface composition of 96% He, 2% C, and 1% N. JL87 shows a similar surface enrichment of carbon and nitrogen, but some significant fraction of hydrogen still remains in its atmosphere. LB1766 has a surface composition devoid of hydrogen and strongly depleted of carbon, indicating that its surface material has undergone CN-cycle processing. We interpret these observations with new evolutionary calculations which suggest that He-rich sdB stars with C-rich compositions are the progeny of stars which underwent a delayed He-core flash on the white-dwarf cooling curve. During such a flash the interior convection zone will penetrate into the H envelope, thereby mixing the envelope with the He- and C-rich core. Such `flash-mixed' stars will arrive on the extreme horizontal branch (EHB) with He- and C-rich surface compositions and will be hotter than the hottest canonical (i.e., unmixed) EHB stars. Two types of flash mixing are possible: `deep' and `shallow', depending on whether the H envelope is mixed deeply into the site of the He flash or only with the outer layers of the core. Based on both their stellar parameters and surface compositions, we suggest that PG1544+488 and JL87 are examples of `deep' and `shallow' flash mixing, respectively. Flash mixing may therefore represent a new evolutionary channel for producing the hottest EHB stars. However, flash mixing cannot explain the abundance pattern in LB1766, which remains a challenge to current evolutionary models.
description: 32 pages, 6 figures; minor additions; to appear in Astrophys. J., February 2004
Detailed comparison of the structures and kinematics of simulated and observed barred galaxies
Creators: name: O'Neill, J. K.
name: Dubinski, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine the observable properties of simulated barred galaxies including radial mass profiles, edge-on structure and kinematics, bar lengths and pattern speed evolution for detailed comparison to real systems. We have run several simulations in which bars are created through inherent instabilities in self-consistent simulations of a realistic disc+halo galaxy model with a disc-dominated, flat rotation curve. These simulations were run at high (N=20M particles) and low (N=500K) resolution to test numerical convergence. We determine the pattern speeds in simulations directly from the phase angle of the bar versus time and the Tremaine-Weinberg method. Fundamental dynamics do not change between the high and low resolution, suggesting that convergence has been reached in this case. We find the higher resolution is needed to simulate structural and kinematic properties accurately. The edge-on view of the higher-resolution system clearly shows the bending instability and formation of a peanut-shaped bulge. We determined bar lengths by different means to determine the simulated bar is fast, with a corotation to bar length ratio under 1.5. Simulated bars in these models form with pattern speeds slower than those observed and slow down during their evolution. Dynamical friction between the bar and dark halo is responsible for this deceleration, as revealed by the transfer of angular momentum between the disc and the halo. However, even though the pattern speed is reduced at later times, the instantaneous scale length of the disc has grown sufficiently for the bar motion to agree with many observations. By using a different model and simulation technique than other authors, we are able to compare the robustness of these methods.
description: 14 pages, 15 figures, submitted to MNRAS. For animation files and high resolution figures, see http://www.astro.utoronto.ca/~oneill
Neutrinoless Double-Beta Decay and Realistic Shell Model
Creators: name: Itaco, Nunzio
name: Coraggio, Luigi
name: Mancino, Riccardo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We report on the calculation of the neutrinoless double-beta decay nuclear matrix element for 76Ge within the framework of the realistic shell model. The effective shell-model Hamiltonian and the two-body transition operator describing the decay are derived by way of many-body perturbation theory. Particular attention is focused on the role played by the so-called Pauli blocking effect in the derivation of the effective operator.
description: Contribution to the proceedings of the IV International Conference on Nuclear Structure and Dynamics NSD2019 (Venice, Italy, 13-17 May 2019) To be published in a volume of EPJ Web of Conferences
title: 01_1573
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: LaMOP

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Assembly and annotation files
Creators: name: Guerrero-Araya, Enzo
name: Meneses, Claudio
name: Castro-Nallar, Eduardo
name: Ana M Guzmán, D.
name: Álvarez-Lobos, Manuel
name: Quesada-Gómez, Carlos
name: Paredes-Sabja, Daniel
name: Rodríguez, César
Publisher: name: figshare
Year: 2019
Subjects: subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: Assemblies and annotations of Clostridium difficile NAP1/RT027/ST01 isolates from Latin America (n=25, identified with LA after the name) and the rest of the world (n=129).
A novel application of Linz-Donawitz Slag for potash recovery from waste mica scrap using chlorination roasting coupled water leaching process
Creators: name: Jena, Sandeep Kumar
name: Nilima Dash
name: Shivakumar I. Angadi
Publisher: name: Taylor & Francis
Year: 2020
Subjects: 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: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: The present article reports a novel process for the recovery of potash values from mica scrap (K2O 8.72%) using Linz-Donawitz Slag (LDS) and NaCl. Acid leaching of ground mica powder suggests a maximum of 22% potassium extraction. The roasting coupled water leaching process, using a mixture of LDS and NaCl, could extract a maximum of 93% potash at 900°C for 30 min roasting. The roasting temperature is the key parameter during the extraction process. The possible potash recovery mechanism is discussed on the basis of XRD, EPMA, and SEM-EDS studies of various feed and processed products.
The impact of stars stripped in binaries on the integrated spectra of stellar populations
Creators: name: Götberg, Y.
name: de Mink, S. E.
name: Groh, J. H.
name: Leitherer, C.
name: Norman, C.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stars stripped of their envelopes from interaction with a binary companion emit a significant fraction of their radiation as ionizing photons. They are potentially important stellar sources of ionizing radiation, however, they are still often neglected in spectral synthesis simulations or simulations of stellar feedback. We modeled the radiative contribution from stripped stars by using detailed evolutionary and spectral models. We estimated their impact on the integrated spectra and specifically on the emission rates of HI-, HeI-, and HeII-ionizing photons from stellar populations. We find that stripped stars have the largest impact on the ionizing spectrum of a population in which star formation halted several Myr ago. In such stellar populations, stripped stars dominate the emission of ionizing photons, mimicking a younger stellar population in which massive stars are still present. Our models also suggest that stripped stars have harder ionizing spectra than massive stars. The additional ionizing radiation affects observable properties that are related to the ionizing emission from stellar populations. In co-eval stellar populations, the ionizing radiation from stripped stars increases the ionization parameter and the production efficiency of HI-ionizing photons. They also cause high values for these parameters for about ten times longer than what is predicted for massive stars. The hard ionizing radiation from stripped stars likely introduces a characteristic ionization structure of the nebula, which leads to the emission of highly ionized elements such as O$^{2+}$ and C$^{3+}$. We, therefore, expect that the presence of stripped stars affects the location in the BPT diagram and the diagnostic ratio of OIII to OII nebular emission lines. Our models are publicly available through CDS database and on the Starburst99 website.
description: Accepted for publication in Astronomy & Astrophysics
Accelerated closed universes in scalar-tensor theories
Creators: name: del Campo, Sergio
name: Salgado, Patricio
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe an accelerating universe model in the context of a scalar-tensor theory. This model is intrinsically closed, and is filled with quintessence-like scalar field components, in addition to the Cold Dark Matter component. With a background geometry specified by the Friedman-Robertson-Walker metric, we establish conditions under which this closed cosmological model, described in a scalar-tensor theory, may look flat in a genuine Jordan-Brans-Dicke theory. Both models become indistinguishable at low enough redshift.
description: 8 pages, 4 figures, in press (CQG)
Die Arbeiten in Milet in den Jahren 2006–2011
Creators: name: Graeve, Volkmar Von
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: Archäologischer Anzeiger, 1. Halbband (2019)
description: Den Schwerpunkt der Arbeiten bildeten die Ausgrabungen im milesischen Aphroditeheiligtum ›von Oikus‹, das im Rahmen des archaischen Programms entdeckt wurde und dessen Freilegung nun abgeschlossen ist. Das Zentrum seiner Topographie bildet ein Gipfelplateau als Standort der sukzessiv erfolgten Tempelbauten, von denen nur die Existenz eines kleinen Baus aus dem frühen 6. Jh. v. Chr. und eines großen spätarchaischen Tempels gesichert ist. Weitere topographische Fixpunkte sind die Westterrasse, deren Anfänge in einem aufgefüllten Steinbruch liegen und die mit den Funden aus dieser Auffüllung einen großen Teil der Votivgaben des Heiligtums geliefert hat, außerdem der Ostabhang mit einem Bothros, der in der Zeit um 630 v. Chr. geschlossen wurde und der mit dieser Datierung eine chronologische Neuorientierung im 7. Jh. v. Chr. notwendig macht. Gegraben wurde außerdem an einer Straße nördlich des Kalabaktepe, die nach der geophysikalischen Prospektion zum Straßenraster des spätarchaischen Stadtplans von Milet gehört hat. Die Grabung hat gezeigt, dass hier infolge des Niedergangs der Stadt nach der Perserzerstörung das neue urbanistische Konzept nicht vollständig umgesetzt wurde.
description: Activities focused on the excavations in the Milesian sanctuary of Aphrodite ›of Oikus‹, discovered within the archaic program and now excavated completely. Its topographical center is a summit plateau, site of successive temple structures: of these, only a small 6th century building and a large late-archaic temple can actually be verified. One of the topographical points of reference is the western terrace which started out as a quarry and which has yielded, from its refill, a great part of the sanctuary’s votive donations. Furthermore, there is the eastern slope with a bothros that was sealed around 630 B.C., this dating necessitating a chronological revision within the 7th century B.C. There have also been digs at a road north of Kalabaktepe belonging – according to geophysical prospection – to the street grid of Miletus’ Late Archaic city plan. The excavation was able to show that no complete implementation of the new urbanistic concept took place in this region due to the decline of the city after its destruction by the Persians.
description: Archäologischer Anzeiger, 1. Halbband (2019)
Phase diagram of a three-dimensional dipolar Ising model with textured Ising axes
Creators: name: Russier, V.
name: Alonso, J. -J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study from tempered Monte Carlo simulations the magnetic phase diagram of a textured dipolar Ising model on a face centered cubic lattice. The Ising coupling of the model follow the dipole-dipole interaction. The Ising axes are distributed with a uniaxial symmetry along the $\hat{z}$ direction with a gaussian probability density of the polar angles. This distribution provides a quenched disorder realization of the dipolar Ising model making a continuous link between the parallel axes dipoles and the random axes dipole models. As expected the phase diagram presents three distinctive phases: paramagnetic, ferromagnetic and spin-glass. A quasi long range ferromagnetic and a reentrant spin-glass phases are obtained in the vicinity of the ferromagnetic spin-glass line. This model provides a way to predict the magnetic phases of magnetic nanoparticles supracrystals in terms of the texturation of the easy axes distribution in the strong anisotropy limit.
description: To be published in Journal of Physics: Condensed Matter
Enantioseparation of racemic amino alcohols using green micellar liquid chromatography and confirmation of absolute configuration with elution order
Creators: name: Alwera, Vijay
name: Sehlangia, Suman
name: Alwera, Shiv
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: FOS: Biological sciences
subject: 60506 Virology

description: Micellar liquid chromatographic method was developed for the enantioseparation of racemic amino alcohols. For that, diastereomeric derivatives of amino alcohols were prepared with activated ester of (S)-ketoprofen and separated on C18 column of RP-HPLC using the aqueous solution of surfactant (Brij-35 and SDS) as an alternative of the organic solvents. Also, chromatographic conditions were optimized by varying concentration of surfactant in aqueous solution, and by varying concentration and pH of the buffer. In addition, density functional theoretical calculations (DFT), validation [LOD (0.245 ng mL−1) and LOQ (0.735 ng mL−1)] and green-assessment score (82 score) were calculated for the developed method.
A Systematic Study of X-Ray Flares from Low-Mass Young Stellar Objects in the Rho Ophiuchi Star-Forming Region with Chandra
Creators: name: Imanishi, K.
name: Nakajima, H.
name: Tsujimoto, M.
name: Koyama, K.
name: Tsuboi, Y.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the results of a systematic study of X-ray flares from low-mass young stellar objects, using Chandra observations of the main region of the Rho Oph. From 195 X-ray sources, including class I-III sources and some young brown dwarfs, we detected a total of 71 X-ray flares. Most of the flares have the typical profile of solar and stellar flares, fast rise and slow decay. We derived the time-averaged temperature (kT), luminosity (L_X), rise and decay timescales (tau_r and tau_d) of the flares, finding that (1) class I-II sources tend to have a high kT, (2) the distribution of L_X during flares is nearly the same for all classes, and (3) positive and negative log-linear correlations are found between tau_r and tau_d, and kT and tau_r. In order to explain these relations, we used the framework of magnetic reconnection model to formulate the observational parameters as a function of the half-length of the reconnected magnetic loop (L) and magnetic field strength (B). The estimated L is comparable to the typical stellar radius of these objects (10^{10-11} cm), which indicates that the observed flares are triggered by solar-type loops, rather than larger ones (10^{12} cm) connecting the star with its inner accretion disk. The higher kT observed for class I sources may be explained by a higher magnetic field strength (about 500 G) than for class II-III sources (200-300 G).
description: 33 pages, 7 figures, accepted for publication in PASJ, the complete version of tables are available at ftp://ftp-cr.scphys.kyoto-u.ac.jp/pub/crmember/kensuke/PASJ_RhoOph/KI_all.tar .gz
The isolation of Luminous Blue Variables resembles aging B-type supergiants, not the most massive unevolved stars
Creators: name: Smith, Nathan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Luminous blue variables (LBVs) are suprisingly isolated from the massive O-type stars that are their putative progenitors in single-star evolution, implicating LBVs as binary evolution products. Aadland et al. (A19) found that LBVs are, however, only marginally more dispersed than a photometrically selected sample of bright blue stars (BBS) in the LMC, leading them to suggest that LBV environments may not exclude a single-star origin. In both comparisons, LBVs have the same median separation, confirming that any incompleteness in the O-star sample does not fabricate LBV isolation. Instead, the relative difference arises because the photometric BBS sample is far more dispersed than known O-type stars. Evidence suggests that the large BBS separation arises because it traces less massive (~20 Msun), aging blue supergiants. Although photometric criteria used by A19 aimed to select only the most massive unevolved stars, visual-wavelength color selection cannot avoid contamination because O and early B stars have almost the same intrinsic color. Spectral types confirm that the BBS sample contains many B supergiants. Moreover, the observed BBS separation distribution matches that of spectroscopically confirmed early B supergiants, not O-type stars, and matches predictions for a ~10 Myr population, not a 3-4 Myr population. A broader implication for ages of stellar populations is that bright blue stars are not a good tracer of the youngest massive O-type stars. Bright blue stars in nearby galaxies (and unresolved blue light in distant galaxies) generally trace evolved blue supergiants akin to SN 1987A's progenitor.
description: 12 pages, 2 Figs., accepted in MNRAS
Characterization of persimmon fruit peel and its biochar for removal of methylene blue from aqueous solutions: thermodynamic, kinetic and isotherm studies
Creators: name: Ates, Ayten
name: Oymak, Tülay
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
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: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Inorganic Chemistry

description: The persimmon fruit peel (PFP) and its biochar (PFP-P) were evaluated for removal of methylene blue (MB) from aqueous solutions and characterized in detail. The pyrolysis of the PFP improved carbon content, surface area, and surface electronegativity of the biochar produced. The effect of initial solution pH, initial MB concentration, contact time, and temperature on the biosorption efficiency of MB on the PFP was investigated through the biosorption experiments in a batch system. The PFP showed higher biosorption removal efficiency than PFP-P due to the existence of hydroxyl and carboxyl functional groups. The maximum biosorption capacity of the PFP was found using 2 g/L of the adsorbent, at a contact time of 180 min and pH of 7. The adsorption kinetics and equilibrium isotherms were well represented by the pseudo-second-order model and the Langmuir model, respectively. The maximum biosorption capacity obtained from the Langmuir isotherm model was 303 mg g−1. Also, the PFP showed an efficient removal efficiency for removal of MB in tap water, seawater, and river water. The high MB biosorption capacity of PFP can be a promising alternative for cationic dye removal at neutral pH.
Spin Foam Models for Quantum Gravity
Creators: name: Perez, Alejandro
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article we review the present status of the spin foam formulation of non-perturbative (background independent) quantum gravity. The article is divided in two parts. In the first part we present a general introduction to the main ideas emphasizing their motivations from various perspectives. Riemannian 3-dimensional gravity is used as a simple example to illustrate conceptual issues and the main goals of the approach. The main features of the various existing models for 4-dimensional gravity are also presented here. We conclude with a discussion of important questions to be addressed in four dimensions (gauge invariance, discretization independence, etc.). In the second part we concentrate on the definition of the Barrett-Crane model. We present the main results obtained in this framework from a critical perspective. Finally we review the combinatorial formulation of spin foam models based on the dual group field theory technology. We present the Barrett-Crane model in this framework and review the finiteness results obtained for both its Riemannian as well as its Lorentzian variants.
description: Topical review, to appear in CQG. Typos corrected and new references added
Die Kleinsiedlung Babunjë : neue Forschungen zur territorialen Siedlungsstruktur zwischen Apollonia und Epidamnos/Dyrrhachion (Albanien)
Creators: name: Fiedler, Manuel
name: Shehi, Eduard
name: Szilamér-Péter, Pánczél
name: Döhner, Gregor
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: Archäologischer Anzeiger, 1. Halbband (2019)
description: Die Ausgrabungen in Babunjë zielen darauf ab, den in spätarchaischer Zeit gegründeten und im frühen Hellenismus aufgegebenen Ort in seiner urbanen Struktur, den Privatbauten und insbesondere seiner Fortifikation zu untersuchen und beispielhaft zugleich die komplexe Siedlungsstruktur an der Ostküste des südlichen Adriatischen Meeres zu erkunden. Die Kleinsiedlung von nur ca. 5 ha Größe, die nach geophysikalischen Messungen ein regelhaftes Straßenraster in Form archaischer Streifenstädte hatte, könnte ein von Apollonia abhängiger Ort gewesen sein. Die Grabungen belegen, dass Babunjë im 5. Jh. v. Chr. mit einer Fortifikation befestigt wurde. Unterschiedlichen Bautechniken und -materialien zufolge – verwendet wurden Konglomeratgestein, Lehmziegel und geschichtete Dachziegel – hatte man die Umfassungsmauer offenbar in Eile errichtet. In der Stratigraphie lassen sich Details der Bauvorgänge ablesen. Untersucht wurde ebenso ein klassisches Haus, von dem bislang zwei von der Straße abgewandte – und möglicherweise auf einen angrenzenden Hof orientierte – Räume angeschnitten wurden. Bemerkenswert unter den Funden ist insbesondere die Bronzestatuette eines auf einem Pferd galoppierenden Kriegers.
description: The excavations at Babunjë are aimed at clarifying the urban structure, private buildings and in particular the fortifications of the site, which was founded in late Archaic times and abandoned in the early Hellenistic period, and seek to examine it as an example of the complex settlement structure on the east coast of the southern Adriatic. The small settlement of only approx. 5 ha, which geophysical surveys have shown to possess a regular street grid with long, narrow insulae, could have been dependent on Apollonia. The excavations prove that Babunjë was fortified with a circuit wall in the 5th cent. B.C. Different construction techniques and building materials – conglomerate, mud-bricks and layered roof tiles were used – indicate the wall was built in a hurry. Details of the construction processes can be discerned in the stratigraphy. A Classical building has also been investigated; two rooms – turned away from the street and possibly oriented towards an adjoining courtyard – have been exposed so far. An especially noteworthy find is the bronze statuette of a warrior on a galloping horse.
description: Archäologischer Anzeiger, 1. Halbband (2019)
A series of Wells-Dawson and Keggin-based compounds with uncoordinated S donors as fluorescence sensors to Hg2+
Creators: name: Ying, Jun
name: Chen, Ya-Guang
name: Wang, Xiu-Yan
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Neuroscience
subject: Biotechnology
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: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Hematology

description: Through using a S-containing ligand 2,2’-dimethyl-4,4’-bithiazole (dbt), a series of Wells-Dawson and Keggin-based compounds, {Zn(dbt)3}{Zn(dbt)2(H2O)}2{HP2WVWVI17O62}·4H2O (1), {Cd(dbt)2(H2O) (HP2WVWVI17O62)}{Cd(dbt)3}{Cd(dbt)2(H2O)}·13H2O (2), {Cd2(dbt)4Cl} {PW12O40} (3) and {Cd2(dbt)4}{SiW12O40} (4), were synthesized under hydrothermal conditions and structurally characterized. In 1, there are three dissociated subunits: Wells-Dawson anion, {Zn(dbt)3}2+ and {Zn(dbt)2(H2O)}2+. In 2, the mono-supporting Wells-Dawson anions exhibit abundant hydrogen bonding interactions with discrete {Cd(dbt)3}2+ and {Cd(dbt)2(H2O)}2+ mononuclear coordination complexes, constructing a supramolecular layer. Compound 3 has a binuclear Cd cluster {Cd2(dbt)4Cl}4+ with a Cl as a bridging atom. The Keggin anions link these binuclear Cd clusters alternately to build a 1D chain. In 4, a pair of {Cd(dbt)2}2+ subunits connect adjacent Keggin anions and a 1D chain is formed. In these four compounds, only the N donors coordinate with Zn or Cd and the S atoms are uncoordinated. These compounds show good fluorescence sensing performance to Hg2+. We also studied the electrochemical and photocatalytic properties of 1–4. These compounds also can act as electrochemical sensors for the detection of nitrite.
Assembly an annotation files of Clostridium difficile B1/NAP1/RT027/ST01 strains
Creators: name: Guerrero-Araya, Enzo
name: Meneses, Claudio
name: Nallar, Eduardo Castro
name: Ana M Guzmán, D.
name: Álvarez-Lobos, Manuel
name: Quesada-Gómez, Carlos
name: Paredes-Sabja, Daniel
name: Rodríguez, Cesar
Publisher: name: figshare
Year: 2019
Subjects: subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: The assemblies and annotations of Clostridium difficile NAP1/RT027/ST01 strain in Latin America
Unidentified Infrared Bands in the Interstellar Medium across the Galaxy
Creators: name: Kahanpaa, J.
name: Mattila, K.
name: Lehtinen, K.
name: Leinert, C.
name: Lemke, D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a set of 6-12 micron ISOPHOT-S spectra of the general interstellar medium of the Milky Way. This part of the spectrum is dominated by a series of strong, wide emission features commonly called the Unidentified Infrared Bands. The sampled area covers the inner Milky Way from l = -60 degr to +60 degr with a ten-degree step in galactic longitude and nominal latitudes 0,+-1 degr. For each grid position the actual observed direction was selected from IRAS 100 micron maps to minimize contamination by point sources and molecular clouds. All spectra were found to display the same spectral features. Band ratios are independent of band strength and Galactic coordinates. A comparison of total observed flux in band features and IRAS 100 micron emission, a tracer for large interstellar dust grains, shows high correlation at large as well as small 1-arcmin scales. This implies a strong connection between large dust grains and the elusive band carriers; the evolutionary history and heating energy source of these populations must be strongly linked. The average mid-infrared spectrum of the Milky Way is found to be similar to the average spectrum of spiral galaxy NGC 891 and the spectra of other spirals. The common spectrum can therefore be used as a template for the 6-12 micron emission of late-type spiral galaxies. Finally, we show that interstellar extinction only weakly influences the observed features even at lambda = 10 microns, where the silicate absorption feature is strongest.
Gravitational Lens System PS J0147+4630 (Andromeda's Parachute): Main Lensing Galaxy and Optical Variability of the Quasar Images
Creators: name: Goicoechea, Luis J.
name: Shalyapin, Vyacheslav N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Because follow-up observations of quadruple gravitational lens systems are of extraordinary importance for astrophysics and cosmology, we present single-epoch optical spectra and $r$--band light curves of PS J0147+4630. This recently discovered system mainly consists of four images ABCD of a background quasar around a foreground galaxy G that acts as a gravitational lens. First, we use long--slit spectroscopic data in the Gemini Observatory Archive and a multi-component fitting to accurately resolve the spectra of A, D, and G. The spectral profile of G resembles that of an early-type galaxy at a redshift of 0.678 $\pm$ 0.001, which is about 20\% higher than the previous estimate. Additionally, the stellar velocity dispersion is measured to $\sim$5\% precision. Second, our early $r$-band monitoring with the Liverpool Telescope leads to accurate light curves of the four quasar images. Adopting time delays predicted by the lens model, the new lens redshift, and a standard cosmology, we report the detection of microlensing variations in C and D as large as $\sim$0.1 mag on timescales of a few hundred days. We also estimate an actual delay between A and B of a few days (B is leading), which demonstrates the big potential of optical monitoring campaigns of PS J0147+4630.
description: 12 pages, 8 figures, 2 tables. Accepted for publication in ApJ
Museruole di cavallo in bronzo dalle stoai dell’Epiro
Creators: name: Rinaldi, Elia
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: Archäologischer Anzeiger, 1. Halbband (2019)
description: Il presente contributo prende in esame due museruole di cavallo in bronzo rinvenute nelle stoai delle agorai di due centri urbani epiroti di età ellenistica. Lo studio dei manufatti viene affrontato attraverso un esame degli aspetti morfologici e un’indagine approfondita del contesto architettonico e del record archeologico di rinvenimento. La ricerca consente, da un lato, di proporre una datazione delle due museruole anche sulla base di una serie di confronti con esemplari provenienti da altre zone del Mediterraneo, dall’altro, permette di motivare la presenza di oggetti così singolari in spazi pubblici e di suggerire nuove ipotesi riguardo alla ricostruzione del contesto deposizionale e alla destinazione funzionale delle stoai.
description: This contribution examines two bronze horse muzzles from the stoai in the agorai of two Hellenistic urban centres of Epirus. The study of these artefacts is conducted through an accurate analysis of their morphological aspects, combined with an investigation of the architectural contexts and archaeological records. The research makes it possible, on the one hand, to propose a dating of the two muzzles, also identifying a series of comparisons with muzzles from other areas of the Mediterranean, and on the other to explain the presence of such characteristic objects in public spaces and suggest new hypotheses regarding the reconstruction of the depositional context and the use of the stoai.
description: Archäologischer Anzeiger, 1. Halbband (2019)
Monte Carlo calculation of the flow of granular materials
Creators: name: Kawasaki, Kazunori
Publisher: name: California Institute of Technology
Year: 1986
Subjects: Aeronautics

description: The flow of granular materials has been investigated theoretically using the Direct Simulation Monte Carlo (DSMC) method for rarefied gas flows implemented on the Caltech concurrent 64-node Cosmic Cube computer. A fundamental understanding of the behavior of a heavily loaded gas under conditions for which collisions among the solid particles suspended in the gas are frequent is very important for a variety of problems, e.g., grain explosions and the performance of metallized solid-propellant rockets. At one extreme of particulate flow (granular material flow), the effect of the interstitial fluid is negligible. In particular, the numerical method has been applied to the problem of sedimentation and channel flow.

Bird's method has been applied to granular material flows by using a hard, rough-sphere particle model and introducing restitution and slip coefficients for particle-particle and particle-boundary collisions, respectively. In the DSMC method, physical space is divided into many cells, each containing several simulated particles. The distance between particles is much greater than the particle diameter.  Using the concurrent computer, cells are assigned singly or in groups to individual processors (nodes). Calculations of particle-particle collisions are carried out locally by each node and information is communicated between adjacent nodes. Using the concurrent computer has enabled powerful computational ability to be brought to bear on the DSMC calculation.

   For a gas sedimentation calculation simulating the gravitational collapse of a uniform atmosphere, significant thermal and wave effects are observed. For flow in a channel at Mach number 2.76 and Reynolds number 32.6, differences are observed between the behavior of granular material flow and gas flow. For both cases significant "slip" at the wall is observed. For the flow of granular material, the boundary layer is thin and the velocity reduction near the wall is small.
Proposal for a New Test of the Time Independence Of The Fine Structure Constant, alpha, Using Orthogonally Polarised Whispering Gallery Modes in a Single Sapphire Resonator
Creators: name: Tobar, Michael Edmund
name: Hartnett, John Gideon
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new experiment to test for the time independence of the fine structure constant, alpha, is proposed. The experiment utilizes orthogonally polarized Transverse Electric and Transverse Magnetic Whispering Gallery Modes in a single sapphire resonator tuned to similar frequencies. When configured as a dual mode sapphire clock, we show that the anisotropy of sapphire makes it is possible to undertake a sensitive measurement from the beat frequency between the two modes. At infrared frequencies this is possible due to the different effect of the lowest phonon frequency on the two orthogonally polarized modes. At microwave frequencies we show that the phonon effect is too small. We show that the Electron Spin Resonance of paramagnetic impurities (such as Cr3+) in the lattice effects only one polarization with an alpha^6 dependence. This enables an enhancement of the sensitivity to temporal changes in a at microwave frequencies.
description: 1 pdf. Accepted to be published in Physical Review D
GaBoDS: The Garching-Bonn Deep Survey -- I. Anatomy of galaxy clusters in the background of NGC 300
Creators: name: Schirmer, Mischa
name: Erben, Thomas
name: Schneider, Peter
name: Pietrzynski, Grzesiek
name: Gieren, Wolfgang
name: Micol, Alberto
name: Pierfederici, Francesco
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Garching-Bonn Deep Survey (GaBoDS) is a virtual 12 square degree cosmic shear and cluster lensing survey, conducted with the WFI@2.2m MPG/ESO telescope at La Silla. It consists of shallow, medium and deep random fields taken in R-band in subarcsecond seeing conditions at high galactic latitude. A substantial amount of the data was taken from the ESO archive, by means of a dedicated ASTROVIRTEL program. In the present work we describe the main characteristics and scientific goals of GaBoDS. Our strategy for mining the ESO data archive is introduced, and we comment on the Wide Field Imager data reduction as well. In the second half of the paper we report on clusters of galaxies found in the background of NGC 300, a random archival field. We use weak gravitational lensing and the red cluster sequence method for the selection of these objects. Two of the clusters found were previously known and already confirmed by spectroscopy. Based on the available data we show that there is significant evidence for substructure in one of the clusters, and an increasing fraction of blue galaxies towards larger cluster radii. Two other mass peaks detected by our weak lensing technique coincide with red clumps of galaxies. We estimate their redshifts and masses.
description: 20 pages, 16 figures, gzipped. An online postscript version with higher quality figures (3.3 MBytes) can be downloaded from http://www.mpa-garching.mpg.de/~mischa/ngc300/ngc300.ps.gz . Submitted to A&A
Driving white dwarf metal pollution through unstable eccentric periodic orbits
Creators: name: Antoniadou, Kyriaki I.
name: Veras, Dimitri
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Planetary debris is observed in the atmospheres of over 1,000 white dwarfs, and two white dwarfs are now observed to contain orbiting minor planets. Exoasteroids and planetary core fragments achieve orbits close to the white dwarf through scattering with major planets. However, the architectures that allow for this scattering to take place are time-consuming to explore with $N$-body simulations lasting $\sim 10^{10}$ yr; these long-running simulations restrict the amount of phase space that can be investigated. Here we use planar and three-dimensional (spatial) elliptic periodic orbits, as well as chaotic indicators through dynamical stability maps, as quick scale-free analytic alternatives to $N$-body simulations in order to locate and predict instability in white dwarf planetary systems that consist of one major and one minor planet on very long timescales. We then classify the instability according to ejection versus collisional events. We generalized our previous work by allowing eccentricity and inclination of the periodic orbits to increase, thereby adding more realism but also significantly more degrees of freedom to our architectures. We also carried out a suite of computationally expensive 10 Gyr $N$-body simulations to provide comparisons with chaotic indicators in a limited region of phase space. We compute dynamical stability maps that are specific to white dwarf planetary systems and that can be used as tools in future studies to quickly estimate pollution prospects and timescales for one-planet architectures. We find that these maps also agree well with the outcomes of our $N$-body simulations. As observations of metal-polluted white dwarfs mount exponentially, particularly in the era of Gaia, tools such as periodic orbits can help infer dynamical histories for ensembles of systems.
description: Accepted for publication in A&A
Sonographie der Hirnnerven bei Gesunden und Parkinson-Patienten
Creators: name: Tsiberidou, Panagiota
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 610 Medical sciences Medicine

description: Bei allen Studienteilnehmern wurde mittels Sonographie der N. vagus, N. accessorius und N. phrenicus untersucht. Zudem wurden die motorische Symptome bei IPS -Patienten mit UPDRS III und die nicht-motorischen Symptome mit dem Non-Motor-Symptoms-Questionnaire bestimmt. Wesentliches Ergebnis ist die Kaliberreduktion des N. vagus, nicht des N. accessorius und N. phrenicus bei Parkinson-Patienten im Vergleich zu gesunden Kontrollen. Es gibt auch eine Korrelation zwischen den Nervenkaliber mit der Herzfrequenzvariabilität, dem Summenscore im NMSQ, dem Alter und dem Geschlecht.
Supergravity on a 3-torus: quantum linearization instabilities with a supergroup
Creators: name: Higuchi, Atsushi
name: Schmieding, Lasse
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that linearized gravity in spacetimes with compact Cauchy surfaces and continuous symmetries suffers from linearization instabilities: solutions to classical linearized gravity in such a spacetime must satisfy so-called linearization stability conditions (or constraints) for them to extend to solutions in the full non-linear theory. Moncrief investigated implications of these conditions in linearized quantum gravity in such background spacetimes and found that the quantum linearization stability constraints lead to the requirement that all physical states must be invariant under the symmetries generated by these constraints. He studied these constraints for linearized quantum gravity in flat spacetime with the spatial sections of toroidal topology in detail. Subsequently, his result was reproduced by the method of group-averaging. In this paper the quantum linearization stability conditions are studied for $\mathcal{N}=1$ simple supergravity in this spacetime. In addition to the linearization stability conditions corresponding to the spacetime symmetries, i.e. spacetime translations, there are also fermionic linearization stability conditions corresponding to the background supersymmetry. We construct all states satisfying these quantum linearization stability conditions, including the fermionic ones, and show that they are obtained by group-averaging over the supergroup of the global supersymmetry of this theory.
description: 36 pages
An experimental investigation of convective flows associated with room fires
Creators: name: Tangren, Ernst N.
Publisher: name: California Institute of Technology
Year: 1978
Subjects: Aeronautics

description: This thesis presents an experimental investigation of the fluid dynamic aspects of a room fire and the applicability of a theoretical model. The model, developed by Zukoski, considers a single room containing a point heat source with or without an opening to the outside. For the case of an opening the interest is in the height and density of the ceiling layer of hot air and combustion products. The case without an opening concerns itself with the time required to fill a room with smoke.

Water was used as the fluid medium and a flow of salt brine represented the heat source. The experiments investigated the effects of fire strength, opening geometry, fire location and fire geometry for the open room case. For the closed room the movement of the ceiling layer interface and the general flow field were investigated.