cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on the Evolution of Black Hole Spin due to Magnetohydrodynamic Accretion
Creators: name: Takahashi, Masaaki
name: Tomimatsu, Akira
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Stationary and axisymmetric ideal magnetohydrodynamic (MHD) accretion onto a black hole is studied analytically. The accreting plasma ejected from a plasma source with low velocity must be super-fast magnetosonic before passing through the event horizon. We work out and apply a trans-fast magnetosonic solution without the detailed analysis of the regularity conditions at the magnetosonic point, by introducing the bending angle $β$ of magnetic field line, which is the ratio of the toroidal and poloidal components of the magnetic field. To accrete onto a black hole, the trans-magnetosonic solution has some restrictions on $β$, which are related to the field-aligned parameters of the MHD flows. One of the restrictions gives the boundary condition at the event horizon for the inclination of a magnetic field line. We find that this inclination is related to the energy and angular momentum transport to the black hole. Then, we discuss the spin-up/down process of a rotating black hole by cold MHD inflows in a secular evolution timescale. There are two asymptotic states for the spin evolution. One is that the angular velocity of the black hole approaches to that of the magnetic field line, and the other is that the spin-up effect by the positive angular momentum influx and the spin-down effect by the energy influx (as the mass-energy influx) are canceled. We also show that the MHD inflows prevents the evolution to the maximally rotating black hole.
description: 16 pages, 12 figures, submitted to PRD
New Observational Constraints on the Winds of M Dwarf Stars
Creators: name: Wood, Brian E.
name: Mueller, Hans-Reinhard
name: Redfield, Seth
name: Konow, Fallon
name: Vannier, Hunter
name: Linsky, Jeffrey L.
name: Youngblood, Allison
name: Vidotto, Aline A.
name: Jardine, Moira
name: Alvarado-Gomez, Julian D.
name: Drake, Jeremy J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High resolution UV spectra of stellar H I Lyman-alpha lines from the Hubble Space Telescope (HST) provide observational constraints on the winds of coronal main sequence stars, thanks to an astrospheric absorption signature created by the interaction between the stellar winds and the interstellar medium. We report the results of a new HST survey of M dwarf stars, yielding six new detections of astrospheric absorption. We estimate mass-loss rates for these detections, and upper limits for nondetections. These new constraints allow us to characterize the nature of M dwarf winds and their dependence on coronal activity for the first time. For a clear majority of the M dwarfs, we find winds that are weaker or comparable in strength to that of the Sun, i.e. Mdot<=1 Mdot_sun. However, two of the M dwarfs have much stronger winds: YZ CMi (M4 Ve; Mdot=30 Mdot_sun) and GJ 15AB (M2 V+M3.5 V; Mdot=10 Mdot_sun). Even these winds are much weaker than expectations if the solar relation between flare energy and coronal mass ejection (CME) mass extended to M dwarfs. Thus, the solar flare/CME relation does not appear to apply to M dwarfs, with important ramifications for the habitability of exoplanets around M dwarfs. There is evidence for some increase in Mdot with coronal activity as quantified by X-ray flux, but with much scatter. One or more other factors must be involved in determining wind strength besides spectral type and coronal activity, with magnetic topology being one clear possibility.
description: 40 pages, 11 figures, to appear in The Astrophysical Journal
title: e-Forschungsberichte, Faszikel 1 (2020)
title: Research E-Papers, Faszikel 1 (2020)
title: Faszikel 1 (2020)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2020

description: Die Kommission zur Erforschung von Sammlungen archäologischer Funde und Unterlagen aus dem nordöstlichen Mitteleuropa (KAFU). Krieg und Zerstörung – Wiederherstellung, Rekonstruktion und Forschung. Die Arbeiten der Jahre 2001 bis 2019...1–5 Dra‘ Abu el-Naga, Ägypten. Das thebanische Pauloskloster (Deir el-Bachît). Zur Wiederverwendung von pharaonischen Bauteilen in der spätantiken Klosteranlage...6–11 Dra‘ Abu el-Naga, Ägypten. Ein angeblicher Fund aus Dra‘ Abu el-Naga: Die sog. Hundestele des Königs Wah-Anch Intef – Eine Forschungsgeschichte...12–16 Dra‘ Abu el-Naga, Ägypten. Möbelfunde in Dra' Abu el-Naga...17–23 Watfa, Ägypten. Die Arbeiten des Jahres 2019...24–26 Vig, Albanien. Das spätantike Kastell und seine Umgebung. Die Arbeiten im Herbst 2018...27–32 Samos, Griechenland. Notizen zu Samos während der NS-Zeit...33–43 Gadara, Jordanien. Der ‚Gadara/Umm Qays Hinterland Survey‘. Die Arbeiten im Herbst 2019...44–48 Tell Bleibil, Jordanien. Die Arbeiten des Jahres 2019...49–51 Baalbek, Libanon. Die Arbeiten des Jahres 2019...52–57 Doclea, Montenegro. Eine römische Stadt in Illyrien. Die Begehung des Jahres 2019...58–64 Ostasien. Hirse – Wann das erste Getreide im nördlichen Ostasien domestiziert und verbreitet wurde. Die Arbeiten des Jahres 2019 (Projekte „BAYCHRON“ und „Bridging Eurasia“)...65–71 Madinat al-Zahra, Spanien. Die Arbeiten des Jahres 2019...72–77 Meroe, Sudan. Connecting Foodways. Ein neues Projekt zu Esstraditionen in Nordost-Afrika und ihren kulturellen Verflechtungen...78–84 Resafa, Syrien. Die Arbeiten der Jahre 2017 bis 2019...85–96 Henchir Bourgou (Djerba), Tunesien. Die Arbeiten der Jahre 2017 bis 2019...97–108 Istanbul, Türkei. Von Babylon nach Istanbul. Erste Einblicke in die Babylon Sammlung des Istanbuler Archäologischen Museums (2017–2019)...109–116 Milet, Türkei. Marmorprovenienz und bauwirtschaftliche Paradoxe (nach Vorarbeiten 2018 und 2019)...117–123
Smarandache Type Function Obtained by Duality
Creators: name: Dumitrescu, C.
name: Virlan, N.
name: Zamfir, St.
name: Radescu, E.
name: Radescu, N.
name: Smarandache, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 11A25

description: In this paper we extend the Smarandache function from the set $N*$ of positive integers to the set $Q$ pf rational numbers. Using the inverse formula, this function is also regarded as a generating function. We put in evidence a procedure to construct a (numerical) function starting from a given function in two particular cases. Also, connections between this function and Euler totient function as well as with Riemann zeta function are established.
description: 15 pages, one figure
Theoretical study and finite element simulation of ZnO/GaAs higher-order Lamb waves for microsensor application in liquid media
Creators: name: Hamidullah, Muhammad
name: Élie-Caille, Céline
name: Leblois, Thérèse
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Lamb waves with dominantly longitudinal displacement component have been reported for sensor application in liquid media. However, they are still limited for the fundamental symmetry mode with low plate thickness-to-wavelength (h/l) ratio, resulting in large wavelength and low resonance frequency. Here we show the finite element simulation study of higher-order Lamb waves on GaAs and ZnO/GaAs plates. In-plane polarised quasi-longitudinal higher-order Lamb waves are obtained at higher h/l ratio resulting in higher resonance frequencies. The solid-liquid contact simulation shows the confinement of acoustic energy inside the plate. The result demonstrates the suitability of ZnO/GaAs higher-order quasi-longitudinal modes for microsensor in liquid media.
New experimental limits on double-beta decay of osmium
Creators: name: Belli, P.
name: Bernabei, R.
name: Cappella, F.
name: Caracciolo, V.
name: Cerulli, R.
name: Danevich, F. A.
name: Incicchitti, A.
name: Kasperovych, D. V.
name: Kobychev, V. V.
name: Kovtun, G. P.
name: Kovtun, N. G.
name: Laubenstein, M.
name: Merlo, V.
name: Poda, D. V.
name: Polischuk, O. G.
name: Shcherban, A. P.
name: Tessalina, S.
name: Tretyak, V. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Double-beta processes in $^{184}$Os and $^{192}$Os were searched for over 15851 h at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. by using a 118 g ultra-pure osmium sample installed on the endcap of a 112 cm$^3$ ultra-low-background broad-energy germanium detector. New limits on double-electron capture and electron capture with positron emission in $^{184}$Os were set at the level of $\lim T_{1/2} \sim 10^{16}-10^{17}$ yr. In particular the $2ν$2K and $2ν$KL decays of $^{184}$Os to the ground state of $^{184}$W are restricted as $T_{1/2}\geq3.0\times 10^{16}$ yr and $T_{1/2}\geq2.0\times 10^{16}$ yr, respectively. A lower limit on the half-life for the double-beta decay of $^{192}$Os to the first excited level of $^{192}$Pt was set as $\lim T_{1/2}=2.0\times 10^{20}$ yr at 90\% C.L.
description: 22 pages, 9 figures, 2 tables
title: e-Forschungsberichte, Faszikel 2 (2019)
title: Research E-Papers, Faszikel 2 (2019)
title: Faszikel 2 (2019)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: Ding-Editionen. Vom archäologischen (Be-)Fund übers Corpus ins Netz...1–12 Das Corpus der antiken Sarkophagreliefs und das Repertorium der christlich-antiken Sarkophage. Die Arbeiten der Jahre 2015 bis 2017...13–20 Assuan, Ägypten. Epigraphik, Bau- und Nutzungsgeschichte des Klosters Deir Anba Hadra. Die Arbeiten des Jahres 2018 bis Juni 2019...21–27 Dahschur, Ägypten. Die Arbeiten der Frühjahrskampagne 2019...28–34 Draʿ Abu El-Naga, Ägypten. Deir el-Bachît und das thebanische Pauloskloster. Sakraltopographie einer Klosterlandschaft und ihre Entwicklung auf dem Hügel von Draʿ Abu el-Naga/Oberägypten. Die Arbeiten des Jahres 2018 und Frühjahres 2019...35–41 Elephantine, Ägypten. Gesamtprojekt Elephantine und Teilprojekt Lebenswirklichkeiten (Realities of Life). Das 50. Grabungsjubiläum und aktuelle Arbeiten...42–50 Gouvernorat Kafr esch-Scheich, Ägypten. Landschaftsarchäologie und regionale Siedlungsnetzwerke um den Fundplatz Tell el-Fara‘in im Nildelta und Untersuchungen am antiken Fundplatz Kom el-Gir. Die Arbeiten des Jahres 2018 und Frühjahres 2019...51–55 Umm el-Qaab (Abydos), Ägypten. Untersuchungen zum Osiriskult in Abydos vom Alten Reich bis in die Spätantike. Die Arbeiten der Jahre 2018 und 2019...56–61 Watfa, Ägypten. Ausgrabungen in Watfa im Fayum und Bearbeitung der Michigan-Papyri aus Karanis. Bericht über das Grabungsjahr 2018/2019...62–64 Vig, Albanien. Grabung im spätantiken Kastell. Die Arbeiten im Frühjahr 2018...65–69 Cherchell, Algerien. Die Neuordnung des Nationalmuseums...70–77 Fürstensitz von Vix, Frankreich. Die geomagnetischen Prospektionen der Jahre 2016 bis 2017...78–83 Athen, Griechenland. »Copenhagen amüsiert sich, wie wohl stets, am Rand des Abgrunds. « Zwei deutsche Archäologen im Exil: Berta Segall und Willy Schwabacher im Mai 1939...84–96 Athen, Griechenland. Kerameikos. Archäologischer Kontext von Fluchtafeln: Brunnen B 34...97–102 Olympia, Griechenland. Impressionen von Olympia während der Besatzungszeit, 1941– 1944...103–112 Guadalupe, Honduras. Kulturelle Interaktion und vorspanische Siedlungsgeschichte im Nordosten von Honduras. Die Arbeiten des Jahres 2018...113–116 Uruk, Irak. Wissenschaftliche Forschungen 2019...117–121 Rom, Italien. Bauforschung am sog. Tempel A, Largo Argentina. Arbeiten und Ergebnisse der Jahre 2018 und 2019 (nach Vorarbeiten 2014, 2016 und 2017)...122–127 Selinunt, Italien. Die Arbeiten der Jahre 2017 und 2018...128–137 Didyma, Türkei. Der archaische Apollontempel (‚Tempel II‘) in Didyma und die Genese der monumentalen ionischen Sakralarchitektur (Publikationsprojekt). Die Arbeiten des Jahres 2018...138–146 Priene, Türkei. Die Fundmünzen von Priene. Die Arbeiten in den Jahren 2015 bis 2017...147–158
Bulk and surface structure of the clean and adsorbate-covered decagonal Al-Co-Ni quasicrystal
Creators: name: Burkardt, Sven
name: Deloudi, Sofia
name: Erbudak, Mehmet
name: Kortan, Ahmet Refik
name: Mungan, Muhittin
name: Steurer, Walter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We review our Al adsorption experiments on the tenfold-symmetry surface of the decagonal Al-Co-Ni quasicrystal and present computational simulations of adsorption on a structural model based on a fundamental Al-Co cluster with 20 Ådiameter, symmetry $\bar{10}2m$, and 8 Åperiodicity. This cluster is the building unit of $τ^2$-Al$_{13}$Co$_4$, from which, by a sequence of minor changes, the structures of the phases in the stability region of decagonal Al-Co-Ni can be derived. The model used for the decagonal Al$_{70}$Co$_{15}$Ni$_{15}$ is an idealized model with a two-layer periodicity (4 Å) and no chemical or structural disorder. We find that the bulk and surface properties of this model are in good agreement with experiments. Our molecular-dynamics simulations of Al adsorption reproduce the experimental results and show that by varying the thermal relaxation rates of the adsorbed layer, a variety of different surface morphologies can be achieved. We also present our recent experiments on dissociative adsorption of oxygen on the decagonal surface.
description: 21 pages, 10 figures. To appear in the Quasicrystals at Interfaces issue of J. Phys. C (July 2008)
The Adapted Ordering Method for Lie Algebras and Superalgebras and their Generalizations
Creators: name: Gato-Rivera, Beatriz
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In 1998 the Adapted Ordering Method was developed for the representation theory of the superconformal algebras in two dimensions. It allows: to determine maximal dimensions for a given type of space of singular vectors, to identify all singular vectors by only a few coefficients, to spot subsingular vectors and to set the basis for constructing embedding diagrams. In this article we present the Adapted Ordering Method for general Lie algebras and superalgebras, and their generalizations, provided they can be triangulated. We also review briefly the results obtained for the Virasoro algebra and for the N=2 and Ramond N=1 superconformal algebras.
description: Many improvements in the redaction for pedagogical purposes. Latex, 11 pages
Inverse Monte-Carlo and Demon Methods for Effective Polyakov Loop Models of SU(N)-YM
Creators: name: Wozar, Christian
name: Kaestner, Tobias
name: Wellegehausen, Bjoern H.
name: Wipf, Andreas
name: Heinzl, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study effective Polyakov loop models for SU(N) Yang-Mills theories at finite temperature. In particular effective models for SU(3) YM with an additional adjoint Polyakov loop potential are considered. The rich phase structure including a center and anti-center directed phase is reproduced with an effective model utilizing the inverse Monte-Carlo method. The demon method as a possibility to obtain the effective models' couplings is compared to the method of Schwinger-Dyson equations. Thermalization effects of microcanonical and canonical demon method are analyzed. Finally the elaborate canonical demon method is applied to the finite temperature SU(4) YM phase transition.
description: 7 pages, 6 figures; poster presented at the XXVI International Symposium on Lattice Field Theory, July 14-19 2008, Williamsburg, Virginia, USA
title: e-Forschungsberichte, Faszikel 1 (2018)
title: Research E-Papers, Faszikel 1 (2018)
title: Faszikel 1 (2018)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2018

description: Landschaftsarchäologie am DAI. Die Arbeiten der Jahre 2016 und 2017...1–4 Afghanistan. Antiker Bergbau und Kulturelles Erbe. Die Arbeiten der Jahre 2013 bis 2017...5–12 Vig, Albanien. Die Arbeiten der Jahre 2015 und 2017...13–19 Addi Akaweh, Tigray, Ethiopia. Archaeological rescue excavations at the site of Abunä Gärima in Wuqro (Tigray, Ethiopia). Season 2017...20–23 Volksrepublik China. Neue Fakten zur Ankunft des Weizens in China. Die Arbeiten des Jahres 2017...24–29 Athen, Griechenland. Aufarbeitung der Geschichte des DAI Athen. Die Arbeiten des Jahres 2017...30–33 Olympia, Griechenland. Der Beginn der neuen Ausgrabungen 1937. Die Arbeiten des Jahres 2017...34–41 Olympia, Griechenland. Die Arbeiten der Jahre 2016 und 2017...42–47 Annandale, Dumfriesshire und Galloway, Großbritannien. Forschungen entlang einer Römischen Straße. Die Arbeiten des Jahres 2017...48–55 Canosa di Puglia, Italien. Die Architektur des Tempels von San Leucio. Die Arbeiten des Jahres 2017...56–61 Wadi Shuʿaib, Jordanien. Das Wadi Shuʿaib Archaeological Survey Project – Archäologische Forschungen zwischen Jordantal und transjordanischem Hochland. Die Arbeiten des Jahres 2017...62–66 Tell Bleibil, Jordanien. Die Arbeiten des Jahres 2017...67–71 Mogador (Essaouira), Marokko. Ein phönizischer Außenposten an der marokkanischen Atlantikküste. Die Arbeiten der Jahre bis 2018...72–75 Stolniceni, Petreni, Brînzeni, Republik Moldau. Luftbildaufnahmen mit Drohnen (UAV) von kupferzeitlichen Siedlungen in Moldawien im Kontext magnetischer Prospektionen und Ausgrabungen. Die Arbeiten der Jahre 2009 bis 2017...76–83 Pietrele, Rumänien. Reparierte Tongefäße der kupferzeitlichen Siedlung Pietrele (4600–4300 v. Chr.). Ergebnisse der Arbeiten der Jahre bis 2017...84–95 Vráble, Slowakei. Die Forschungen auf dem frühbronzezeitlichen Gräberfeld. Die Arbeiten seit 2015...96–100 Vráble, Slowakei. Herausbildung und Niedergang des frühbronzezeitlichen Siedlungszentrums – Untersuchungen zu Wirtschaft, Sozialstruktur und politischer Organisation eines Sozialverbandes und seines Umfeldes. Überblick und die Arbeiten in der Siedlung 2017...101–108 Didyma, Türkei. Der archaische Apollontempel ('Tempel II') in Didyma und die Genese der monumentalen ionischen Sakralarchitektur (Publikationsprojekt). Die Arbeiten der Jahre 2016 und 2017...109–117 Side, Türkei. Ein neuentdeckter Kaiserbrief aus Side: Gallienus hilft Side bei einer Getreideknappheit. Die Arbeiten bis 2018...118–124 Fujairah, United Arab Emirates. Archaeological investigations at the site of Dibba 76: Late Bronze Age – Iron Age multiple tombs and their buried individuals. Season 2017...125–131
V405 Aurigae: A High Magnetic Field Intermediate Polar
Creators: name: Piirola, V.
name: Vornanen, T.
name: Berdyugin, A.
name: Coyne, G. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Our simultaneous multicolor (UBVRI) circular polarimetry has revealed nearly sinusoidal variation over the WD spin cycle, and almost symmetric positive and negative polarization excursions. Maximum amplitudes are observed in the B and V bands (+-3 %). This is the first time that polarization peaking in the blue has been discovered in an IP, and suggests that V405 Aur is the highest magnetic field IP found so far. The polarized flux spectrum is similar to those found in polars with magnetic fields in the range B ~ 25-50 MG. Our low resolution circular spectropolarimetry has given evidence of transient features which can be fitted by cyclotron harmonics n = 6, 7, and 8, at a field of B = 31.5 +- 0.8 MG, consistent with the broad-band polarized flux spectrum. Timings of the circular polarization zero crossovers put strict upper limits on WD spin period changes and indicate that the WD in V405 Aur is currently accreting closely at the spin equilibrium rate, with very long synchronization timescales, T_s > 10^9 yr. For the observed spin to orbital period ratio, P_{spin}/P_{orb} = 0.0365, and P_{orb} ~ 4.15 hr, existing numerical accretion models predict spin equilibrium condition with B ~ 30 MG if the mass ratio of the binary components is q_1 ~ 0.4. The high magnetic field makes V405 Aur a likely candidate as a progenitor of a polar.
description: To appear in The Astrophysical Journal, September 1 Issue (2008), 9 pages, 10 figures
Tracking the vortex motion by using Brownian fluid particles
Creators: name: Qian, Zhongmin
name: Qiu, Youchun
name: Zhang, Yihuang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 60J35 (Primary), 35Q30, 76F65 (Secondary)

description: In this paper we propose a simple yet powerful vortex method to numerically approximate the dynamics of an incompressible flow. The idea is to sample the distribution of the initial vortices of the fluid flow in question then follow vortex dynamics along Taylor's Brownian fluid particles. The weak convergences of this approximation scheme are obtained for 2D and 3D cases, though only for small time in 3D case. Based on our method, the simulation results are quite attracting.
description: 18 pages, 5 figures
Prenatal education : its impact on second stage breathing
Creators: name: Selwood, Barbara Lane
Publisher: name: University of British Columbia
Year: 2010

description: An observational study of the impact of prenatal education on the conduct of second stage labour was conducted in the Grace Hospital Low-Risk Labour and Delivery Module. The study participants, 35 prenatal class attenders and 15 non-attenders, were recruited following admission to the hospital during the first stage of labour. Data were collected utilizing three data collection tools: a Childbirth Observation Instrument; a Medical Record Data Form; and, a Postpartum Interview. Findings indicated that the majority of women in the prenatal attender group (74.3%) were English speaking and Caucasian, while the majority of women in the non-attender group (73.3%) were of Asian descent and did not have English as their main language. Fifteen (42.9%) in the prenatal group, and 3 (20%) in the non-attender group received epidural anesthesia during the first stage of labour. Eighteen (51.4%) of the attenders and 4 (26.6%) of the non-attenders required intervention (delivery by forceps or caesarean section); The majority (12 attenders and 2 non-attenders) received epidural anesthesia during the first stage of labour. The majority (62.9% and 66.7%) of attenders and non-attenders used Valsalva pushing throughout the second stage; with 37.1% and 33.3% respectively using spontaneous pushing. Overall 72% of the women were always instructed to use the Valsalva Maneuver and 28% received conflicting guidance (spontaneous and Valsalva), when verbal instructions were given. Two prenatal attenders attributed the breathing techniques used to information received during prenatal classes. Four of the 5 non-attenders who used spontaneous pushing did so because they chose to ignore directions to use Valsalva pushing and used a spontaneous pushing approach. The findings failed to detect a significant difference in the study population due to the limited sample size. The overall second stage duration was 70.4 minutes for attenders and 71.6 minutes for non-attenders. For those women who used spontaneous pushing for the majority of their contractions the second stage was 75.6 minutes and 81.3 minutes respectively; and, 68.3 minutes and 68.0 minutes for those using Valsalva pushing. Apgar scores were the same for both groups —20% scored less than seven and 80% with a score of seven or more at one minute after delivery. Since the study results failed to show that prenatal classes have a significant impact on the conduct of second stage, there is a need for more discussion of the effects of the Valsalva maneuver during prenatal classes and a need for greater emphasis and practice of 'tools' which can be used in coping with second stage contractions.
Comparison of the Orbital Properties of the Milky Way Globular Clusters from the Data of the Gaia DR2 and EDR3 Catalogs
Creators: name: Bajkova, A. T.
name: Bobylev, V. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We provide new values of the orbital parameters of 152 globular clusters, which are calculated using the new mean proper motions obtained from the Gaia EDR3 catalog data. The orbits were integrated 5 Gyr back in an axisymmetric three-component potential with a spherical bulge, disk component, and spherical dark halo in the Navarro-Frenk-White form, which we refined using the rotation curve of objects with large galactocentric distances up to 200 kpc. The obtained orbital parameters were compared with the orbital parameters of the same globular clusters calculated earlier in the same gravitational potential using proper motions from the Gaia DR2 catalog data. The objects whose orbits underwent significant changes were identified.
description: 16 pages, 6 figures, 1 table
Early Abnormal Temperature Structure of X-ray Looptop Source of Solar Flares
Creators: name: Shen, Jinhua
name: Zhou, Tuanhui
name: Ji, Haisheng
name: Wang, Na
name: Cao, Wenda
name: Wang, Haimin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This Letter is to investigate the physics of a newly discovered phenomenon -- contracting flare loops in the early phase of solar flares. In classical flare models, which were constructed based on the phenomenon of expansion of flare loops, an energy releasing site is put above flare loops. These models can predict that there is a vertical temperature gradient in the top of flare loops due to heat conduction and cooling effects. Therefore, the centroid of an X-ray looptop source at higher energy bands will be higher in altitude, for which we can define as normal temperature distribution. With observations made by {\it RHESSI}, we analyzed 10 M- or X-class flares (9 limb flares). For all these flares, the movement of looptop sources shows an obvious U-shaped trajectory, which we take as the signature of contraction-to-expansion of flare loops. We find that, for all these flares, normal temperature distribution does exist, but only along the path of expansion. The temperature distribution along the path of contraction is abnormal, showing no spatial order at all. The result suggests that magnetic reconnection processes in the contraction and expansion phases of these solar flares are different.
description: 11 pages, 4 figures
The Orbital Period of the Wolf-Rayet Binary IC 10 X-1; Dynamic Evidence that the Compact Object is a Black Hole
Creators: name: Prestwich, A. H.
name: Kilgard, R.
name: Crowther, P. A.
name: Carpano, S.
name: Pollock, A. M. T.
name: Zezas, A.
name: Saar, S. H.
name: Roberts, T. P.
name: Ward, M. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: IC 10 X-1 is a bright (Lx=10^38 ergs/s) variable X-ray source in the local group starburst galaxy IC 10. The most plausible optical counterpart is a luminous Wolf-Rayet star, making IC 10 X-1 a rare example of a Wolf-Rayet X-ray binary. In this paper, we report on the detection of an X-ray orbital period for IC 10 X-1of 34.4 hours. This result, combined with a re-examination of optical spectra, allow us to determine a mass function for the system f(m)=7.8 Msun and a probable mass for the compact object of 24-36 Msun. If this analysis is correct, the compact object is the most massive known stellar black black hole. We further show that the observed period is inconsistent with Roche lobe overflow, suggesting that the binary is detached and the black hole is accreting the wind of the Wolf-Rayet star. The observed mass loss rate of [MAC92] 17-A is sufficient to power the X-ray luminosity of IC 10 X-1.
description: Accepted for publication in ApJ Letters
Optical Crystals and Light-Bullets in Kerr Resonators
Creators: name: Tlidi, M.
name: Gopalakrishnan, S. S.
name: Taki, M.
name: Panajotov, K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Stable light bullets and clusters of them are presented in the monostable regime using the mean-field Lugiato-Lefever equation [Gopalakrishnan, Panajotov, Taki, and Tlidi, Phys. Rev. Lett. 126, 153902 (2021)]. It is shown that three-dimensional (3D) dissipative structures occur in a strongly nonlinear regime where modulational instability is subcritical. We provide a detailed analysis on the formation of optical 3D crystals in both the super- and sub-critical modulational instability regimes, and we highlight their link to the formation of light bullets in diffractive and dispersive Kerr resonators. We construct bifurcation diagrams associated with the formation of optical crystals in both monostable and bistable regimes. An analytical study has predicted the predominance of body-centered-cubic (bcc) crystals in the intracavity field over a large variety of other 3D solutions with less symmetry. These results have been obtained using a weakly nonlinear analysis but have never been checked numerically. We show numerically that indeed the most robust structures over other self-organized crystals are the bcc crystals. Finally, we show that light-bullets and clusters of them can occur also in a bistable regime.
Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe$_2$
Creators: name: Miyake, Atsushi
name: Shimizu, Yusei
name: Sato, Yoshiki J.
name: Li, Dexin
name: Nakamura, Ai
name: Homma, Yoshiya
name: Honda, Fuminori
name: Flouquet, Jacques
name: Tokunaga, Masashi
name: Aoki, Dai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Metamagnetic transitions in the novel spin-triplet superconductor UTe$_2$ were investigated through the newly developed simultaneous measurements of magnetization and sample temperature for the field along the orthorhombic $b$-axis and close to the [011] direction, where reentrant superconductivity (RSC) is detected below and above the first-order metamagnetic transition field $H_{\rm m}$. Combining the Maxwell's relation and the Clausius-Clapeyron equation, we obtained the field dependence of Sommerfeld coefficient $γ$ through the first-order metamagnetic transition. A significant enhancement of the effective mass toward $H_{\rm m}$ were detected for both field directions. On the other hand, above $H_{\rm m}$, the effective mass discontinuously decreases for $H~||~b$, while it discontinuously increases for $H~||~\sim [011]$, which seems to make a crucial role for the RSC.
description: 8 pages, 11 figures, including supplemental material. To be published in Journal of Physical Society of Japan
Transport of Protostellar Cosmic Rays in Turbulent Dense Cores
Creators: name: Axen, Margot Fitz
name: Offner, Stella S. S.
name: Gaches, Brandt A. L.
name: Fryer, Chris L.
name: Hungerford, Aimee
name: Silsbee, Kedron
Publisher: name: arXiv
Year: 2021
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: Recent studies have suggested that low-energy cosmic rays (CRs) may be accelerated inside molecular clouds by the shocks associated with star formation. We use a Monte Carlo transport code to model the propagation of CRs accelerated by protostellar accretion shocks through protostellar cores. We calculate the CR attenuation and energy losses and compute the resulting flux and ionization rate as a function of both radial distance from the protostar and angular position. We show that protostellar cores have non-uniform CR fluxes that produce a broad range of CR ionization rates, with the maximum value being up to two orders of magnitude higher then the radial average at a given distance. In particular, the CR flux is focused in the direction of the outflow cavity, creating a 'flashlight' effect and allowing CRs to leak out of the core. The radially averaged ionization rates are less than the measured value for the Milky Way of $ζ\approx 10^{-16} \rm s^{-1}$; however, within $r \approx 0.03$ pc from the protostar, the maximum ionization rates exceed this value. We show that variation in the protostellar parameters, particularly in the accretion rate, may produce ionization rates that are a couple of orders of magnitude higher or lower than our fiducial values. Finally, we use a statistical method to model unresolved sub-grid magnetic turbulence in the core. We show that turbulence modifies the CR spectrum and increases the uniformity of the CR distribution but does not significantly affect the resulting ionization rates.
From Data Topology to a Modular Classifier
Creators: name: Ennaji, Abdel
name: Ribert, Arnaud
name: Lecourtier, Yves
Publisher: name: arXiv
Year: 2008
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This article describes an approach to designing a distributed and modular neural classifier. This approach introduces a new hierarchical clustering that enables one to determine reliable regions in the representation space by exploiting supervised information. A multilayer perceptron is then associated with each of these detected clusters and charged with recognizing elements of the associated cluster while rejecting all others. The obtained global classifier is comprised of a set of cooperating neural networks and completed by a K-nearest neighbor classifier charged with treating elements rejected by all the neural networks. Experimental results for the handwritten digit recognition problem and comparison with neural and statistical nonmodular classifiers are given.
title: e-Forschungsberichte, Faszikel 1 (2017)
title: Research E-Papers, Faszikel 1 (2017)
title: Faszikel 1 (2017)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: Dialogangebote. Die Anrede des Kaisers jenseits der offiziellen Titulatur...1–6 iDAI.thesauri...7–11 Finding the Woolly Sheep. Meta-analyses of archaeozoological data from Southwest-Asia and Southeast-Europe...12–18 Abydos / Umm el-Qaab, Ägypten. Aufarbeitung der Arbeiten in den prädynastischen und frühzeitlichen Königsgräbern...19–21 Bigge, Ägypten...22–31 Gouvernorat Kafr esch-Scheich, Ägypten. Landschaftsarchäologie und regionale Siedlungsnetzwerke um den Fundplatz Tell el-Faraʿin (Buto) im Nildelta...32–35 Dahschur, Ägypten...36–41 Elephantine, Ägypten. Projekt Lebenswirklichkeiten (Realities of Life)...42–47 Elephantine, Ägypten. Der Chnumtempel des Neuen Reiches...48–53 Kairo, Ägypten. Die Goldblechbeschläge aus dem Grab des Tutanchamun...54–57 Kalapodi, Griechenland. Neue Forschungen in der Umgebung der Tempelkomplexe...58–63 Iberische Halbinsel. Die Terrakotten der Iberischen Halbinsel von den vorgeschichtlichen Anfängen bis zum Ausgang der Antike...64–68 Uruk, Irak. Feldforschungen und Aufarbeitung von Grundlagenforschung // Konservierungsarbeiten in der Uruk-Warka-Sammlung des DAI an der Universität Heidelberg...69–75 Jerusalem, Israel/Palästina. Archäologie (be)trifft Schule – Ein deutsch-palästinensisches Geschichtsprojekt in Jerusalem als Bildungs- und Friedensarbeit...76–77 Jerusalem, Israel/Palästina. Geophysikalische Erkundung der Lage und des Verlaufs der herodianischen Stadtmauer unter dem heutigen christlichen Viertel der Jerusalemer Altstadt...78–85 Jerusalem, Israel/Palästina. Die Grabung auf dem Zionsberg im Südwesten der Altstadt von Jerusalem (im Bereich des historischen Anglikanisch-Preußischen Friedhofs)...86–94 Gadara, Jordanien. Das "Gadara Region Project"...95–96 Mushash 163, Jordanien. Die Grabungskampagnen 2015/2016 // Die lithischen Kleinfunde...97–104 Tayma, Saudi-Arabien. Survey im Gräberfeld von Rujum Saʿsaʿ...105–113 Sekule, Slowakei. Ein germanisches Gräberfeld an der March...114–118 Añora, Spanien. Der Fundplatz ‚La Losilla‘ bei Añora (Córdoba) – eine spätantike Kirche im ländlichen Bereich der Baetica...119–127 Munigua, Spanien...128–142 Ibiza, Spanien. Zum antiken Bleiglanzabbau am Puig de s’Argentera...143–150 Hamadab, Sudan...151–157 Resafa, Syrien...158–167 Shir, Syrien...168–173 Torbulok, Tadschikistan...174–183 Carthage, Tunisia. The Carthage Circus Project: Aims, Strategy and Results...184–191 Bezirk Charkov, Ukraine. Die Infrastruktur im Gebiet der Dnepr-Severskij Donec-Wasserscheide in spätrömischer Zeit und zu Beginn der Völkerwanderungszeit...192–196 Ohio, USA. Monumentale Zeremoniallandschaften der Hopewell-Kultur...197–203
Data Quality Monitoring system of the Baikal-GVD experiment
Creators: name: Allakhverdyan, V. A.
name: Avrorin, A. D.
name: Avrorin, A. V.
name: Aynutdinov, V. M.
name: Bannasch, R.
name: Bardačová, Z.
name: Belolaptikov, I. A.
name: Borina, I. V.
name: Brudanin, V. B.
name: Budnev, N. M.
name: Dik, V. Y.
name: Domogatsky, G. V.
name: Doroshenko, A. A.
name: Dvornický, R.
name: Dyachok, A. N.
name: Dzhilkibaev, Zh. -A. M.
name: Eckerová, E.
name: Elzhov, T. V.
name: Fajt, L.
name: Fialkovski, S. V.
name: Gafarov, A. R.
name: Golubkov, K. V.
name: Gorshkov, N. S.
name: Gress, T. I.
name: Katulin, M. S.
name: Kebkal, K. G.
name: Kebkal, O. G.
name: Khramov, E. V.
name: Kolbin, M. M.
name: Konischev, K. V.
name: Kopański, K. A.
name: Korobchenko, A. V.
name: Koshechkin, A. P.
name: Kozhin, V. A.
name: Kruglov, M. V.
name: Kryukov, M. K.
name: Kulepov, V. F.
name: Malecki, Pa.
name: Malyshkin, Y. M.
name: Milenin, M. B.
name: Mirgazov, R. R.
name: Naumov, D. V.
name: Nazari, V.
name: Noga, W.
name: Petukhov, D. P.
name: Pliskovsky, E. N.
name: Rozanov, M. I.
name: Rushay, V. D.
name: Ryabov, E. V.
name: Safronov, G. B.
name: Shaybonov, B. A.
name: Shelepov, M. D.
name: Šimkovic, F.
name: Sirenko, A. E.
name: Skurikhin, A. V.
name: Solovjev, A. G.
name: Sorokovikov, M. N.
name: Štekl, I.
name: Stromakov, A. P.
name: Sushenok, E. O.
name: Suvorova, O. V.
name: Tabolenko, V. A.
name: Tarashansky, B. A.
name: Yablokova, Y. V.
name: Yakovlev, S. A.
name: Zaborov, D. N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The main purpose of the Baikal-GVD Data Quality Monitoring (DQM) system is to monitor the status of the detector and collected data. The system estimates quality of the recorded signals and performs the data validation. The DQM system is integrated with the Baikal-GVD's unified software framework ("BARS") and operates in quasi-online manner. This allows us to react promptly and effectively to the changes in the telescope conditions.
description: Contribution from the Baikal-GVD Collaboration presented at the 37th International Cosmic Ray Conference, Online - Berlin, Germany, 12-23 July 2021. Proceeding: PoS-ICRC2021-1094
Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties
Creators: name: Archer, A. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Colloidal particles that are confined to an interface such as the air-water interface are an example of a two-dimensional fluid. Such dispersions have been observed to spontaneously form cluster and stripe morphologies in certain systems with isotropic pair potentials between the particles, due to the fact that the pair interaction between the colloids has competing attraction and repulsion over different length scales. Here we present a simple density functional theory for a model of such a two-dimensional fluid. The theory predicts a bulk phase diagram exhibiting cluster, stripe and bubble modulated phases, in addition to homogeneous fluid phases. Comparing with simulation results for this model from the literature, we find that the theory is qualitatively reliable. The model allows for a detailed investigation of the structure of the fluid and we are able to obtain simple approximate expressions for the static structure factor and for the length scale characterising the modulations in the microphase separated phases. We also investigate the behaviour of the system under confinement between two parallel hard walls. We find that the confined fluid phase behaviour can be rather complex.
description: 12 pages, 8 figures. Accepted for publication in Phys. Rev. E
The efficacy of a store-and-forward file transfer system
Creators: name: Sadowski, Edward Richard
Publisher: name: University of British Columbia
Year: 2010

description: Most existing File Transfer Systems are connection-based, where the actual transfer of a file immediately follows the transfer's specification. Few systems allow Three-Party Transfers, where a person on one computer can request the transfer of a file residing on a second computer to a third computer. A Store-and-Forward File Transfer System separates the specification and transmission phases of a file transfer. A Store-and-Forward File Transfer System has been designed and implemented using as its medium of transmission a Computer Based Message System based on the current CCITT proposal. This File Transfer System allows genuine Three-Party Transfers. Results indicate that such a system is both feasible and practical.
Improving Variational Autoencoder based Out-of-Distribution Detection for Embedded Real-time Applications
Creators: name: Feng, Yeli
name: Ng, Daniel Jun Xian
name: Easwaran, Arvind
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Uncertainties in machine learning are a significant roadblock for its application in safety-critical cyber-physical systems (CPS). One source of uncertainty arises from distribution shifts in the input data between training and test scenarios. Detecting such distribution shifts in real-time is an emerging approach to address the challenge. The high dimensional input space in CPS applications involving imaging adds extra difficulty to the task. Generative learning models are widely adopted for the task, namely out-of-distribution (OoD) detection. To improve the state-of-the-art, we studied existing proposals from both machine learning and CPS fields. In the latter, safety monitoring in real-time for autonomous driving agents has been a focus. Exploiting the spatiotemporal correlation of motion in videos, we can robustly detect hazardous motion around autonomous driving agents. Inspired by the latest advances in the Variational Autoencoder (VAE) theory and practice, we tapped into the prior knowledge in data to further boost OoD detection's robustness. Comparison studies over nuScenes and Synthia data sets show our methods significantly improve detection capabilities of OoD factors unique to driving scenarios, 42% better than state-of-the-art approaches. Our model also generalized near-perfectly, 97% better than the state-of-the-art across the real-world and simulation driving data sets experimented. Finally, we customized one proposed method into a twin-encoder model that can be deployed to resource limited embedded devices for real-time OoD detection. Its execution time was reduced over four times in low-precision 8-bit integer inference, while detection capability is comparable to its corresponding floating-point model.
description: This article appears as part of the ESWEEK-TECS special issue and will be presented in the International Conference on Embedded Software (EMSOFT), 2021
Constraining the 21cm brightness temperature of the IGM at $z$=6.6 around LAEs with the Murchison Widefield Array
Creators: name: Trott, Cathryn M.
name: Jordan, C. H.
name: Line, J. L. B.
name: Lynch, C. R.
name: Yoshiura, S.
name: McKinley, B.
name: Dayal, P.
name: Pindor, B.
name: Hutter, A.
name: Takahashi, K.
name: Wayth, R. B.
name: Barry, N.
name: Beardsley, A.
name: Bowman, J.
name: Byrne, R.
name: Chokshi, A.
name: Greig, B.
name: Hasegawa, K.
name: Hazelton, B. J.
name: Howard, E.
name: Jacobs, D.
name: Kolopanis, M.
name: Mitchell, D. A.
name: Morales, M. F.
name: Murray, S.
name: Pober, J. C.
name: Rahimi, M.
name: Tingay, S. J.
name: Webster, R. L.
name: Wilensky, M.
name: Wyithe, J. S. B.
name: Zheng, Q.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The locations of Ly-$α$ emitting galaxies (LAEs) at the end of the Epoch of Reionisation (EoR) are expected to correlate with regions of ionised hydrogen, traced by the redshifted 21~cm hyperfine line. Mapping the neutral hydrogen around regions with detected and localised LAEs offers an avenue to constrain the brightness temperature of the Universe within the EoR by providing an expectation for the spatial distribution of the gas, thereby providing prior information unavailable to power spectrum measurements. We use a test set of 12 hours of observations from the Murchison Widefield Array (MWA) in extended array configuration, to constrain the neutral hydrogen signature of 58 LAEs, detected with the Subaru Hypersuprime Cam in the \textit{Silverrush} survey, centred on $z$=6.58. We assume that detectable emitters reside in the centre of ionised HII bubbles during the end of reionization, and predict the redshifted neutral hydrogen signal corresponding to the remaining neutral regions using a set of different ionised bubble radii. A prewhitening matched filter detector is introduced to assess detectability. We demonstrate the ability to detect, or place limits upon, the amplitude of brightness temperature fluctuations, and the characteristic HII bubble size. With our limited data, we constrain the brightness temperature of neutral hydrogen to $Δ{\rm T}_B
description: 9 pages, 6 figures, accepted for publication in MNRAS