cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Random integral representations for free-infiniteley divisible and tempered distributions
Creators: name: Jurek, Zbigniew J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60E07, 60E10 (Primary) 60B11, 60G51 (Secondary)

description: There are given sufficient conditions under which mixtures of dilations of Lévy spectral measures, on a Hilbert space, are Lévy measures again. We introduce some random integrals with respect to infinite dimensional Lévy processes, which in turn give some integral mappings. New classes (convolution semigroups) are introduced. One of them gives an unexpected relation between the free (Voiculescu) and the classical Lévy-Khintchine formulae while the second one coincides with tempered stable measures (Mantegna nad Stanley) arisen in statistical physics.}
Guatemalan maya refugees in Mexico: mothers and the treatment of children's illness
Creators: name: Purdey, Alice Francina
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: RA 410 P87 1992
subject: Refugees - Guatemala
subject: Women refugees - Mexico - Attitudes
subject: Women refugees - Medical care - Mexico - Utilization

description: Bibliography: p. 125-136.
Inhaltsverzeichnis
Creators: name: Die Redaktion
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 42 Nr. 2 (2001): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
A Cognitive developmental analysis of the interpretation of family stories by adolescents and pre-adolescents
Creators: name: Salter, Diane J.
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: BF 723 S74 S35 1992
subject: Children's stories - Psychological aspects
subject: Cognition in children
subject: Children - Language
subject: Storytelling ability in children

description: Bibliography: p. 100-104.
Weakly broadened iron line in the X-ray spectrum of the Ultra Luminous X-ray source M82 X-1
Creators: name: Caballero-Garcia, M. D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we present the best quality XMM-Newton and Suzaku data from M82 X-1 so far. We analyze the spectra of this remarkable Ultra-Luminous X-ray Source in a self-consistent manner. We have disentangled emission from the host galaxy, responsible for the soft X-ray emission (E<2.5 keV), which is successfully described by a two-temperature thermal emission from a hot plasma in multi-phase state, plus a narrow Fe line emission at 6.7 keV. This allowed us to properly study the intrinsic continuum emission from M82 X-1. The continuum of the Suzaku spectrum is curved and the high quality data of the Suzaku spectrum allowed us to significantly detect a weakly broadened Fe K-alpha emission line. The Equivalent-Width is in the range 30-80 eV and it does not depend on the model applied for the continuum. Assuming that this line is coming from the ULX via disc fluorescence, the data indicates a disc truncation at a radius of 6-20 gravitational radii. This value is comparable to or even larger than the Innermost Stable Circular Orbit of a non-spinning (Schwarzschild) black hole. Future longer observations might test this scenario.
description: Accepted (09/08/2011) for publication in MNRAS. (7 pages, including 6 figures and 3 tables)
Astrometry and radial velocities of the planet host M dwarf GJ 317: new trigonometric distance, metallicity and upper limit to the mass of GJ 317b
Creators: name: Anglada-Escudé, Guillem
name: Boss, Alan P.
name: Weinberger, Alycia J.
name: Thompson, Ian B.
name: Butler, R. Paul
name: Vogt, Steven S.
name: Rivera, Eugenio J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We have obtained precision astrometry of the planet hosting M dwarf GJ 317 in the framework of the Carnegie Astrometric Planet Search project. The new astrometric measurements give a distance determination of 15.3 pc, 65% further than previous estimates. The resulting absolute magnitudes suggest it is metal rich and more massive than previously assumed. This result strengthens the correlation between high metallicity and the presence of gas giants around low mass stars. At 15.3 pc, the minimal astrometric amplitude for planet candidate GJ 317b is 0.3 milliarcseconds (edge-on orbit), just below our astrometric sensitivity. However, given the relatively large number of observations and good astrometric precision, a Bayesian Monte Carlo Markov Chain analysis indicates that the mass of planet b has to be smaller than twice the minimum mass with a 99% confidence level, with a most likely value of 2.5 Mjup. Additional RV measurements obtained with Keck by the Lick-Carnegie Planet search program confirm the presence of an additional very long period planet candidate, with a period of 20 years or more. Even though such an object will imprint a large astrometric wobble on the star, its curvature is yet not evident in the astrometry. Given high metallicity, and the trend indicating that multiple systems are rich in low mass companions, this system is likely to host additional low mass planets in its habitable zone that can be readily detected with state-of-the-art optical and near infrared RV measurements.
description: 20 pages of text, 9 Figures, 8 tables. Accepted in ApJ (in press)
Heinrich Siemer, Die Steinwerke im Dorf und Kirchspiel Ankum
Creators: name: Rasch, Matthias
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: Rezension zu: Heinrich Siemer, Die Steinwerke im Dorf und Kirchspiel Ankum. Herausgeber: Heimat- und Verkehrsverein Ankum e.V. 2000, 179 Seiten, zahlreiche s/w-Abb., Hardcover, ISBN 3-9506181-4-5.
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 42 Nr. 2 (2001): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Visualisierung von Informationen durch ein virtuelles Modell – Entwicklung einer dreidimensionalen Navigationsumgebung für baugeschichtliche Daten und Entwicklungsstadien am Beispiel der Burg Trifels bei Annweiler
Creators: name: Baier, Christoph
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 45 Nr. 2 (2004): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Modelo De Control Viable Para El Manejo Sostenible Del Stock De Anchoveta Peruana (Engraulis Ringens)
Creators: name: Oliveros-Ramos, Ricardo
Publisher: name: Zenodo
Year: 2009
Subjects: Control theory
viability theory
natural resource management
management strategies
fisheries

description: Tesis para optar al Título Profesional de biólogo
The not-in-my-backyard syndrome: a study of locational conflict as it relates to the siting of controversial housing
Creators: name: Hooper, Diane N.
Publisher: name: Environmental Design
Year: 1992
Subjects: subject: HD 318 H64 1992
subject: NIMBY syndrome - Canada
subject: Homesites - Canada
subject: Community - Attitudes
subject: Conflict management - Canada

description: Bibliography: p. 74-79.
Entropy Spectrum of a Carged Black Hole of Heterotic String Theory via Adiabatic Invariance
Creators: name: Larranaga, Alexis
name: Cabarique, Luis
name: Londono, Manuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using adiabatic invariance and the Bohr-Sommerfeld quantization rule we investigate the entropy spectroscopy of a charged black hole of heterotic string theory. It is shown that the entropy spectrum is equally spaced identically to the Schwarzschild, Reissner-Nordström and Kerr black holes. Since the adiabatic invariance method does not use quasinormal mode analysis, there is no need to impose the small charge limit and no confusion on whether the real part or imaginary part is responsible for the entropy spectrum.
description: 8 pages, no figures
Restoration, modernity and scripture: theory and practice in the early decades of the Stone-Campbell movement
Creators: name: Poirier, Donald J.
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: BV 3773 P65 1992
subject: Evangelicalism - United States - History - 19th Century
subject: Campbell, Alexander, 1788-1866
subject: Stone, Barton W. (Barton Warren), 1772-1844
subject: Stone-Campbell movement

description: Bibliography: p. 227-236.
Large thermal Hall coefficient in bismuth
Creators: name: Kobayashi, W.
name: Koizumi, Y.
name: Moritomo, Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a systematical study of thermal Hall effect on a bismuth single crystal by measuring resistivity, Hall coefficient, and thermal conductivity under magnetic field, which shows a large thermal Hall coefficient comparable to the largest one in a semiconductor HgSe. We discuss that this is mainly due to a large mobility and a low thermal conductivity comparing theoretical calculations, which will give a route for controlling heat current in electronic devices.
description: 4pages, 3 figures
Mid-Infrared Extinction Mapping of Infrared Dark Clouds II. The Structure of Massive Starless Cores and Clumps
Creators: name: Butler, Michael J.
name: Tan, Jonathan C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (abridged) We develop the mid-infrared extinction (MIREX) mapping technique of Butler & Tan (2009, Paper I), presenting a new method to correct for the Galactic foreground emission based on observed saturation in independent cores. Using Spitzer GLIMPSE 8 micron images, this allows us to accurately probe mass surface densities, Sigma, up to ~0.5g/cm^2 with 2" resolution. We then characterize the structure of 42 massive starless and early-stage IRDC cores and their surrounding clumps, measuring Sigma_cl(r) from the core/clump centers. We first assess the properties of the core/clump at a scale where the total enclosed mass as projected on the sky is M_cl=60Msun. We find these objects have a mean radius of R_cl~0.1pc, mean Sigma_cl=0.3g/cm^2 and, if fit by a power law density profile rho_cl ~ r^{-k_{rho,cl}}, a mean value of k_{rho,cl}=1.1. If we assume a core is embedded in each clump and subtract the surrounding clump envelope to derive the core properties, we find a mean core density power law index of k_{rho,c} = 1.6. We repeat this analysis as a function of radius and derive the best-fitting power law plus uniform clump envelope model for each of the 42 core/clumps. The cores have typical masses of M_c~100Msun and mean Sigma_c~0.1g/cm^2, and are embedded in clumps with comparable mass surface densities. We conclude massive starless cores exist and are well-described by singular polytropic spheres. Their relatively low values of Sigma and the fact that they are IR dark may imply that their fragmentation is inhibited by magnetic fields rather than radiative heating. Comparing to massive star-forming cores, there is tentative evidence for an evolution towards higher densities and steeper density profiles as star formation proceeds.
description: 28 pages, 16 figures, to appear in ApJ, high-resolution version available http://www.astro.ufl.edu/~butler85/Publications.html
NO-assisted molecular-beam epitaxial growth of nitrogen substituted EuO
Creators: name: Wicks, R.
name: Altendorf, S. G.
name: Caspers, C.
name: Kierspel, H.
name: Sutarto, R.
name: Tjeng, L. H.
name: Damascelli, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated a method for substituting oxygen with nitrogen in EuO thin films, which is based on molecular beam epitaxy distillation with NO gas as the oxidizer. By varying the NO gas pressure, we produce crystalline, epitaxial EuO_(1-x)N_x films with good control over the films' nitrogen concentration. In-situ x-ray photoemission spectroscopy reveals that nitrogen substitution is connected to the formation Eu3+ 4f6 and a corresponding decrease in the number of Eu2+ 4f7, indicating that nitrogen is being incorporated in its 3- oxidation state. While small amounts of Eu3+ in over-oxidized Eu_(1-delta)O thin films lead to a drastic suppression of the ferromagnetism, the formation of Eu3+ in EuO_(1-x)N_x still allows the ferromagnetic phase to exist with an unaffected Tc, thus providing an ideal model system to study the interplay between the magnetic f7 (J=7/2) and the non-magnetic f6 (J=0) states close to the Fermi level.
description: 4 pages, 4 figures, a high resolution copy see http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/EuON-MBE-APL.pdf
Portable Colonoscope: Wireless Medical Hybrid Snake Robot
Creators: name: Tafrishi, Seyed Amir
name: Shahbazi, Mohammad
name: Atabak Maleki
Publisher: name: Zenodo
Year: 2016

description: After researching currently available colonoscopy technologies, some alternative structures were sketched and most suited was proposed as wireless novel mechanism. The electrical and mechanical specifications were then constructed to prepare for the implementation. The prototype was successfully implemented and it was redesigned to be acceptable under Medical Ministry of Health and Medical Education of Iran (MMHME) health/hygiene specifications to use in practice. Eventually, the project succeeded in its objectives and was validated by MMHME.

Link to more information:

https://www.dropbox.com/sh/quagyjbfqit31ij/AABVViXDw1yyXlN126Flx58Ba?dl=0
Ultrafast Entropy Production in Non-Equilibrium Magnets
Creators: name: Tietjen, Finja
name: Geilhufe, R. Matthias
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present an ultrafast thermodynamics framework to model heat generation and entropy production in laser-driven ferromagnetic systems. By establishing a connection between the magnetic field strength of the laser pulse and magnetization dynamics we model time-dependent entropy production rates and deduce the associated heat dissipation in epitaxial and polycrystalline FeNi and CoFeB thin films. Our theoretical predictions are validated by comparison to experimental magnetization dynamics data, shedding light on thermodynamic processes on picosecond timescales. Crucially, we incorporate recently observed inertial spin dynamics, to describe their impact on heat generation in pump-probe experiments. As such, this formalism provides novel insights into controlling heat production in magnetic systems, and contributes to advancing the understanding of non-equilibrium thermodynamics in magnetic systems, with implications for future experimental protocols in spintronics and nanotechnology.
Thermodynamics of the superconducting state in Calcium at 200 GPa
Creators: name: Szczęśniak, R.
name: Durajski, A. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The thermodynamic parameters of the superconducting state in Calcium under the pressure at 200 GPa were calculated. The Coulomb pseudopotential values ($μ^{\star}$) from 0.1 to 0.3 were taken into consideration. It has been shown, that the specific heat's jump at the critical temperature and the thermodynamic critical field near zero Kelvin strongly decrease with $μ^{\star}$. The dimensionless ratios $r_{1}\equiv ΔC(T_{C})/C^{N}(T_{C})$ and $r_{2}\equiv T_{C}C^{N}(T_{C})/H^{2}_{C}(0)$ significantly differ from the predictions based on the BCS model. In particular, $r_{1}$ decreases from 2.64 to 1.97 with the Coulomb pseudopotential; whereas $r_{2}$ increases from 0.140 to 0.157. The numerical results have been supplemented by the analytical approach.
description: 7 pages, 6 figures
Hunting  And Sale Of Pangolins Across Sub-Saharan Africa: A Preliminary Analysis
Creators: name: Ingram, Daniel J
name: Coad, Lauren
name: Scharlemann, Jorn P W
Publisher: name: Zenodo
Year: 2016
Subjects: biodiversity
conservation
ecology
Africa
bushmeat
Manidae
Pholidota

description: Pangolins (Pholidota: Manidae) are hunted and traded for their meat and scales. We conducted preliminary analyses on the hunting and sale at markets of four species of pangolin across Sub-Saharan Africa based on data from the OFFTAKE database. Our analyses show that all four species of African pangolin are hunted and sold at markets throughout much of Sub-Saharan Africa. The proportion of pangolins as part of the total vertebrates hunted has increased significantly during the 43 years, from 1972-2014, for which we have data.
Ecological approach in health promotion with a distinct cultural group: the Dariusleut Hutterites
Creators: name: Phillips, Donna L.
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: RC 685 C6 P56 1992
subject: Coronary heart disease - Alberta
subject: Hutterite Brethren - Alberta
subject: Holistic medicine
subject: Health promotion

description: Bibliography: p. 163-179.
Nonadiabatic generation of spin currents in a quantum ring with Rashba and Dresselhaus spin-orbit interactions
Creators: name: Nita, Marian
name: Marinescu, D. C.
name: Ostahie, Bogdan
name: Manolescu, Andrei
name: Gudmundsson, Vidar
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: When subjected to a linearly polarized terahertz pulse, a mesoscopic ring endowed with spin-orbit interaction (SOI) of the Rashba-Dresselhaus type exhibits nonuniform azimuthal charge and spin distributions. Both types of SOI couplings are considered linear in the electron momentum. Our results are obtained within a formalism based on the equation of motion satisfied by the density operator which is solved numerically for different values of the angle $ϕ$, the angle determining the polarization direction of the laser pulse. Solutions thus obtained are later employed in determining the time-dependent charge and spin currents, whose values are calculated in the stationary limit. Both these currents exhibit an oscillatory behavior complicated in the case of the spin current by a beating pattern. We explain this occurrence on account of the two spin-orbit interactions which force the electron spin to oscillate between the two spin quantization axes corresponding to Rashba and Dresselhaus interactions. The oscillation frequencies are explained using the single particle spectrum.
description: 9 pages, 5 figures, Conference "Advanced many-body and statistical methods in mesoscopic systems", June 27 -July 2, 2011, Constanta, Romania
Reveiling and revealing: renaissance poetry and the mode of allegory
Creators: name: Batycki, Donna M. F.
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: PR 535 A4 B38 1992
subject: English poetry - Early modern, 1500-1700 - History and criticism
subject: Skelton, John, 1460?-1529. Bowge of Courte
subject: Spenser, Edmund, 1552?-1599. Faerie queene
subject: Bunyan, John, 1628-1688. Pilgrim's progress
subject: Allegory

description: Bibliography: p. 289-297.
Unstable $m=1$ modes of counter-rotating Keplerian discs
Creators: name: Gulati, Mamta
name: Saini, Tarun Deep
name: Sridhar, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the linear $m=1$ counter-rotating instability in a two-component, nearly Keplerian disc. Our goal is to understand these \emph{slow} modes in discs orbiting massive black holes in galactic nuclei. They are of interest not only because they are of large spatial scale--and can hence dominate observations--but also because they can be growing modes that are readily excited by accretion events. Self-gravity being nonlocal, the eigenvalue problem results in a pair of coupled integral equations, which we derive for a two-component softened gravity disc. We solve this integral eigenvalue problem numerically for various values of mass fraction in the counter-rotating component. The eigenvalues are in general complex, being real only in the absence of the counter-rotating component, or imaginary when both components have identical surface density profiles. Our main results are as follows: (i) the pattern speed appears to be non negative, with the growth (or damping) rate being larger for larger values of the pattern speed; (ii) for a given value of the pattern speed, the growth (or damping) rate increases as the mass in the counter-rotating component increases; (iii) the number of nodes of the eigenfunctions decreases with increasing pattern speed and growth rate. Observations of lopsided brightness distributions would then be dominated by modes with the least number of nodes, which also possess the largest pattern speeds and growth rates.
description: 26 pages, 9 figures, Submitted to MNRAS
Imaginäre Reisen. Ein fast vergessenes Kulturphänomen des 19. Jahrhunderts
Creators: name: Storch, Ursula
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2020

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 70 (2019): ICOMOS – Hefte des Deutschen Nationalkomitees
Determination of Electromagnetic Source Direction as an Eigenvalue Problem
Creators: name: Martínez-Oliveros, Juan C.
name: Lindsey, Charles
name: Bale, Stuart D.
name: Krucker, Säm
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Low-frequency solar and interplanetary radio bursts are generated at frequencies below the ionospheric plasma cutoff and must therefore be measured in space, with deployable antenna systems. The problem of measuring both the general direction and polarization of an electromagnetic source is commonly solved by iterative fitting methods such as linear regression that deal simultaneously with both directional and polarization parameters. We have developed a scheme that separates the problem of deriving the source direction from that of determining the polarization, avoiding iteration in a multi-dimensional manifold. The crux of the method is to first determine the source direction independently of concerns as to its polarization. Once the source direction is known, its direct characterization in terms of Stokes vectors in a single iteration if desired, is relatively simple. This study applies the source-direction determination to radio signatures of flares received by STEREO. We studied two previously analyzed radio type III bursts and found that the results of the eigenvalue decomposition technique are consistent with those obtained previously by Reiner et al. (Solar Phys. 259, 255, 2009). For the type III burst observed on 7 December 2007, the difference in travel times from the derived source location to STEREO A and B is the same as the difference in the onset times of the burst profiles measured by the two spacecraft. This is consistent with emission originating from a single, relatively compact source. For the second event of 29 January 2008, the relative timing does not agree, suggesting emission from two sources separated by 0.1 AU, or perhaps from an elongated region encompassing the apparent source locations.
description: 22 pages, 7 figures, Accepted in Solar Physics
Omnify Project
Creators: name: Tafrishi, Seyed Amir
Publisher: name: Zenodo
Year: 2015

description: By doing integrated investigations via diverse society members from campus and city with a parallel brainstorming to detect everyday life emergencies that can occur to any individual with his/her own relevant characteristics, caused to create “Omnify” project. ‘ Omnia’ with its own vivid meaning, it finds the solution for multi-dimensional problems in which takes place in our daily lives. Basically, “Omnify” project as a mobile phone application solves ambiguities that every person faces in their normal days such as How much a restaurant/café will be crowded? or Has anything new had happened to a place that I am planning to go? ,and proposes optimized solutions to reach a destination with considering factors like availability and crowdedness of place, safety of path to travel, shortest or fastest way to reach place (using data collision of other costumers with protecting their privacy) and considering costumers with specific physical conditions ( e.g. sigh-disabled people, physical handicaps or vehicle users). In other words, “Omnify” will be an active social community that besides removing the boundaries between normal and disorder people, it will be a place for public to get acknowledged and notified about possible troubles that they may face during their daily needs.
Post project analysis: a case study of the environmental impact assessment and the environmental management program of the Jolu Gold Mine, northern Saskatchewan
Creators: name: Bres, A. Faye
Publisher: name: Environmental Design
Year: 1992
Subjects: subject: TN 424 C32 S363 1993
subject: Gold mines and mining - Saskatchewan - Environmental aspects
subject: Environmental impact analysis - Saskatchewan - Jolu Gold Mine
subject: Jolu Gold Mine (Sask.)

description: Bibliography: p. 135-140.
Coexistence of different electronic phases in the K0.8Fe1.6Se2 superconductor: a bulk-sensitive hard x-rays spectroscopy study
Creators: name: Simonelli, L.
name: Saini, N. L.
name: Sala, M. Moretti
name: Mizuguchi, Y.
name: Takano, Y.
name: Takeya, H.
name: Mizokawa, T.
name: Monaco, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have studied electronic and magnetic properties of the K0.8Fe1.6Se2 superconductor by x-ray absorption and emission spectroscopy. Detailed temperature dependent measurements alongwith a direct comparison with the binary FeSe system have revealed coexisting electronic phases: a majority phase with high spin 3+Fe state and a minority phase with intermediate spin 2+Fe state. The effect of high temperature annealing suggests that the compressed phase with lower spin 2+Fe state is directly related with the high Tc superconductivity in the title system. The results clearly underline glassy nature of superconductivity in the electronically inhomogeneous K0.8Fe1.6Se2, similar to the superconductivity in granular phases.
Peer-Review im Rampenlicht
Creators: name: Frick, Claudia
Publisher: name: Informationspraxis
Year: 2020

description: Durch die Coronavirus-Pandemie sind nicht nur wissenschaftliche Erkenntnisse, sondern auch deren Begutachtungen in das öffentliche Rampenlicht gerückt. Insbesondere das bekannte Preprint der Arbeitsgruppe um Christian Drosten und die öffentlichen Gutachten dazu haben viel Aufmerksamkeit erhalten. Dieses spezielle Open Peer-Review-Verfahren wird analysiert, um in der Diskussion um die Zukunft interner Wissenschaftskommunikation als praktisches Fallbeispiel zu dienen. Es zeigt sich, dass ein solches Verfahren auch völlig frei von einer sammelnden oder koordinierenden Stelle erfolgreich und bereichernd ablaufen kann. Nichtsdestotrotz müssen solche Prozesse künftig zumindest infrastrukturell besser organisiert sein.
description: Informationspraxis, Bd. 6 Nr. 2 (2020)
Testing Distance Estimators with the Fundamental Manifold
Creators: name: Zaritsky, Dennis
name: Zabludoff, Ann I.
name: Gonzalez, Anthony H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We demonstrate how the Fundamental Manifold (FM) can be used to cross-calibrate distance estimators even when those "standard candles" are not found in the same galaxy. Such an approach greatly increases the number of distance measurements that can be utilized to check for systematic distance errors and the types of estimators that can be compared. Here we compare distances obtained using SN Ia, Cepheids, surface brightness fluctuations, the luminosity of the tip of the red giant branch, circumnuclear masers, eclipsing binaries, RR Lyrae stars, and the planetary nebulae luminosity functions. We find no significant discrepancies (differences are < 2 sigma) between distance methods, although differences at the ~10% level cannot yet be ruled out. The potential exists for significant refinement because the data used here are heterogeneous B-band magnitudes that will soon be supplanted by homogeneous, near-IR magnitudes. We illustrate the use of FM distances to 1) revisit the question of the metallicity sensitivity of various estimators, confirming the dependence of SN Ia distances on host galaxy metallicity, and 2) provide an alternative calibration of H_0 that replaces the classical ladder approach in the use of extragalactic distance estimators with one that utilizes data over a wide range of distances simultaneously.
description: Accepted for publication in ApJ
Modelling and adaptive technique application to a cell levitation apparatus
Creators: name: Shu, Zhi-Ming
Publisher: name: Engineering
Year: 1992
Subjects: subject: QC 585.7 D5 S38 1992
subject: Dielectrophoresis
subject: Polarization (Electricity)
subject: Cell separation
subject: Cytochemistry

description: Bibliography: p. 114-116.
Neuerscheinungen
Creators: name: Redaktion, Die
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2020

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 49 Nr. 2 (2020)
Comparison of statistical methods for the alignment of strapdown inertial systems
Creators: name: Liu, Ziwen
Publisher: name: Engineering
Year: 1992
Subjects: subject: TA 549 L58 1992
subject: Surveying - Statistical methods
subject: Kalman filtering

description: Bibliography: p. 78-80.
description: In the thesis, different numerical methods for the alignment of a Strapdown Inertial Surveying System (SISS) are investigated. Kalman filtering is used as the standard real-time processing method. A new wave filtering method proposed by Salychev and Bykovsky [1991] is presented and successfully used as an alternative to the conventional real-time Kalman filter. For post-mission processing, a recursive least squares method suitable for linear dynamic systems is developed. Repeated Kalman filtering is used as an important means to improve the estimation of the azimuth. Optimal smoothing is also used for refining the azimuth estimation of the SISS. Shown through experimental results using the LTN-90-100 strapdown system is that the different methods can be useful for different purposes. Kalman filtering and wave filtering can be used as real-time alignment algorithms. The wave method reaches a stable state within three minutes while the Kalman filter needs ten minutes. On the other hand, Kalman filtering provides an estimate of the filtering accuracy and this allows statistical testing which is not possible with the wave method. Repeated Kalman filtering, optimal smoothing and least squares methods give comparable results in post-mission processmg. They are accurate within about one arc minute and are stable to about ten arc seconds over a period of ten minutes.
Die Anfänge Triers
Creators: name: Koethe, Harald
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2020

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 13 Nr. 3 (1938): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Von Ereignissen zu Strukturen
Creators: name: Pirner, Hans J.
Publisher: name: Heidelberger Jahrbücher Online
Year: 2020

description: A single event is not sufficient, to identify a structure. Only the repetition of similar events can lead to an understanding of the underlying structure. A historical event can never be fully explained by its supposed structure, conversely a structure cannot only be explained by events. In physics, explanation is a necessary condition to understand an event. In this essay, I give examples of structures on various natural scales: In the world around us, we experience matter in solid, liquid or gaseous states, which mirror their structure. At the level of individual atoms, we encounter the slow-down of the thermal dance of the molecules at very low temperature. The elementary particles have intricate family structures that are just as complicated as family structures in anthropology. The universe presents events that can illuminate the long dark night from 1 million years to 1 billion years after the big bang. I show how the researcher inductively derives physical structures from events, but I will also indicate that there are metastructures found by mathematical deduction.
description: Heidelberger Jahrbücher Online, Bd. 5 (2020): Entwicklung – Wie aus Prozessen Strukturen werden
Traum oder Wirklichkeit?
Creators: name: Jörg, Hartmut
Publisher: name: AKMB-news: Informationen zu Kunst, Museum und Bibliothek
Year: 2020

description: Rezension zu: Antoine Laurain: Das Bild aus meinem Traum. Roman / aus dem Französischen von Sina de Malafosse. – Hamburg : Atlantik, 2016. – 191 Seiten. – EST: Ailleurs si j’y suis . – ISBN 978-3-455-65045-7
description: AKMB-news: Informationen zu Kunst, Museum und Bibliothek, Bd. 25 Nr. 2 (2019): AKMB-news
Die karolingische Porticus der Aachener Pfalz
Creators: name: Buchkremer, Joseph
Publisher: name: Bonner Jahrbücher
Year: 2020

description: -
description: Bonner Jahrbücher, Bd. 149 (1949): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
Parameter choices in HaarPSI for IQA with medical images
Creators: name: Karner, Clemens
name: Gröhl, Janek
name: Selby, Ian
name: Babar, Judith
name: Beckford, Jake
name: Else, Thomas R
name: Sadler, Timothy J
name: Shahipasand, Shahab
name: Thavakumar, Arthikkaa
name: Roberts, Michael
name: Rudd, James H. F.
name: Schönlieb, Carola-Bibiane
name: Weir-McCall, Jonathan R
name: Breger, Anna
Publisher: name: arXiv
Year: 2024
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: When developing machine learning models, image quality assessment (IQA) measures are a crucial component for the evaluation of obtained output images. However, commonly used full-reference IQA (FR-IQA) measures have been primarily developed and optimized for natural images. In many specialized settings, such as medical images, this poses an often overlooked problem regarding suitability. In previous studies, the FR-IQA measure HaarPSI showed promising behavior regarding generalizability. The measure is based on Haar wavelet representations and the framework allows optimization of two parameters. So far, these parameters have been aligned for natural images. Here, we optimize these parameters for two medical image data sets, a photoacoustic and a chest X-ray data set, with IQA expert ratings. We observe that they lead to similar parameter values, different to the natural image data, and are more sensitive to parameter changes. We denote the novel optimized setting as HaarPSI$_{MED}$, which improves the performance of the employed medical images significantly (p<0.05). Additionally, we include an independent CT test data set that illustrates the generalizability of HaarPSI$_{MED}$, as well as visual examples that qualitatively demonstrate the improvement. The results suggest that adapting common IQA measures within their frameworks for medical images can provide a valuable, generalizable addition to employment of more specific task-based measures.
description: Main Paper: 5 pages, 3 figures, 2 tables. Supplemental Material: 4 pages, 2 figures, 4 tables
Spin parity and broken symmetry in finite spin-1/2 chains with frustrated exchange: quantum transition from high to low spin
Creators: name: Kumar, Manoranjan
name: Soos, Zoltán G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Exact diagonalization of finite spin-1/2 chains with periodic boundary conditions is applied to the ground state (gs) of chains with ferromagnetic (F) exchange $J_1 < 0$between first neighbors, antiferromagnetic (AF) exchange $J_2 = αJ_1 > 0$between second neighbors, and axial anisotropy $0 \le Δ\le 1$. In zero field, the gs is in the $S_z = 0$ sector for the relevant parameters and is doubly degenerate at multiple points $γ_m = (α_m, Δ_m)$ in the $α$, $Δ$ plane. Degeneracy under inversion at sites or spin parity or both leads, respectively, to a bond order wave (BOW), to staggered magnetization or to vector chiral (VC) order. Exact results up to $N = 28$ spins directly yield order parameters and spin correlation functions whose weak N dependencies allow inferences about infinite chains. The high-spin gs at $J_2 = 0$ changes discontinuously at $γ_1 = (-1/4, 1)$ to a singlet in the isotropic ($Δ= 1$) chain. The transition from high to low spin $S(α, Δ)$ is continuous for $ Δ< Δ_B = 0.95 \pm 0.01$ on the degeneracy line $α_1(Δ)$. The gs has staggered magnetization between $Δ_A = 0.72$ and $Δ_B$, and a BOW for $Δ< Δ_A$. When both inversion and spin parity are reversed at $γ_m$, the correlation functions $C(p)$ for spins separated by $p$ sites are identical. $C(p)$ minima are shifted by $π/2$ from the minima of VC order parameters at separation $p$, consistent with right and left-handed helices along the z axis and spins in the xy plane. Degenerate gs of finite chains are related to quantum phase diagrams of extended $α$, $Δ$ chains, with good agreement for order parameters along the line $α_1(Δ)$.
description: 9 pages, 10 figures, Phys. Rev. B (In Press)
Vasubandhu's parinama theory
Creators: name: Fujimoto, Akira
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: BQ 7529 V367 F85 1992
subject: Vasubandhu
subject: Yogacara (Buddhism)
subject: Sankhya

description: Bibliography: p. 157-177.
description: This thesis examines Vasubandhu's vijnana-paripama by investigating ‘what it is' in Yogacara philosophy. This is done by critical reading of Sanskrit, Tibetan, and Chinese texts. Chapter One addresses Vasubandhu's hagiography and works. This thesis does not take the two-Vasubandhu theory brought by E. Frauwallner, because there is not sufficient evidence to accept the existences of two Vasubandhus. This thesis regards Vasubandhu as one who lived in 400-480 A.D. Chapter Two examines Vasubandhu's vijnana-paripama. First, based on Asanga's *Mahayana-samgraha, important ideas of Yogacara are surveyed. Secondly, sources of Vasubandhu's vijnana-paripama are introduced. Thirdly, Vasubandhu's vijnana-paripama is defined through the examination of Vasubandhu's *Trimsika-karika and its three extant commentaries. Chapter Three introduces parip.ama theory of the Samkhya-Yoga school. Historical accounts on the confrontation between Vasubandhu and the Samkhya-Yoga philosophers are also examined and concluded that there is no evidence of the existence of mutual influence of parinama theories between them.
Transport and Dephasing in a Quantum Dot: Multiply Connected Graph Model
Creators: name: Treiber, Maximilian
name: Yevtushenko, Oleg
name: von Delft, Jan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using the theory of diffusion in graphs, we propose a model to study mesoscopic transport through a diffusive quantum dot. The graph consists of three quasi-1D regions: a central region describing the dot, and two identical left- and right- wires connected to leads, which mimic contacts of a real system. We find the exact solution of the diffusion equation for this graph and evaluate the conductance including quantum corrections. Our model is complementary to the RMT-models describing quantum dots. Firstly, it reproduces the universal limit at zero temperature. But the main advantage compared to RMT-models is that it allows one to take into account interaction-induced dephasing at finite temperatures. Besides, the crossovers from open to almost closed quantum dots and between different regimes of dephasing can be described within a single framework. We present results for the temperature dependence of the weak localization correction to the conductance for the experimentally relevant parameter range and discuss the possibility to observe the elusive 0D-regime of dephasing in different mesoscopic systems.
description: 12 pages
Women's daily travel in Ningbo City, China: an empirical study with planning applications
Creators: name: Naylor, Brenda Lynn
Publisher: name: Environmental Design
Year: 1992
Subjects: subject: HD 5717.5 C42 N56 1992
subject: Commuting - China - Ningbo City
subject: Women - China - Ningbo City
subject: Choice of transportation

description: Bibliography: p. 193-204.
The Ionization Fraction in the DM Tau Protoplanetary Disk
Creators: name: Oberg, Karin I.
name: Qi, Chunhua
name: Wilner, David J.
name: Andrews, Sean M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present millimeter-wave observations of several molecular ions in the disk around the pre-main-sequence star DM Tau and use these to investigate the ionization fraction in different regions of the disk. New Submillimeter Array (SMA) observations of H2D+ J=1_10 - 1_11, N2H+ J=4-3 and CO J=3-2 are presented. H2D+ and N2H+ are not detected and using the CO 3-2 disk size the observations result in an upper limit of <0.47 K km s-1 for both lines, a factor of 2.5 below previous single-dish H2D+ observations. Assuming LTE, a disk midplane temperature of 10-20 K and estimates of the H2D+ o/p ratio, the observed limit corresponds to NH2D+ < 4 - 21 \times 1012 cm-2. We adopt a parametric model for the disk structure from the literature and use new IRAM 30 meter telescope observations of the H13CO+ J=3-2 line and previously published SMA observations of the N2H+ J=3-2, HCO+ J=3-2 and DCO+ J=3-2 lines to constrain the ionization fraction, xi, in three temperature regions in the disk where theoretical considerations suggest different ions should dominate: (1) a warm, upper layer with T>20 K where CO is in the gas-phase and HCO+ is most abundant, where we estimate xi \simeq 4 \times 10-10, (2) a cooler molecular layer with T = 16-20 K where N2H+ and DCO+ abundances are predicted to peak, with xi \simeq 3\times10-11, and (3) the cold, dense midplane with T<16 K where H3+ and its deuterated isotopologues are the main carriers of positive charge, with xi < 3\times10-10. While there are considerable uncertainties, these estimates are consistent with a decreasing ionization fraction into the deeper, colder, and denser disk layers. Stronger constraints on the ionization fraction in the disk midplane will require not only substantially more sensitive observations of the H2D+ 1_10 - 1_11 line, but also robust determinations of the o/p ratio, observations of D2H+ and stronger constraints on where N2 is present in the gas phase.
description: Accepted for publication in ApJ. 20 pages, including 5 figures
Finite element modelling of load transfer through articular cartilage
Creators: name: Van Der Voet, Adrian Frank
Publisher: name: University of Calgary
Year: 1992
Subjects: subject: TA 347 F5 V36 1992
subject: Shear (Mechanics)
subject: Finite element method
subject: Articular cartilage - Diseases

description: Bibliography: p. 200-209.
description: Articular cartilage is a hydrated connective tissue lining apposing bones in synovial joints. Articular cartilage is essential for load transmission of joint forces and joint lubrication. Mechanical factors are implicated in joint diseases, such as osteoarthritis, therefore knowledge of mechanical function and properties is necessary in prevention and treatment of joint diseases. Indentation testing of intact cartilage is one method of evaluating the mechanical function and properties of articular cartilage. The first hypothesis is that indentation stiffness is affected by structural heterogeneity and mechanical anisotropy. Numerical finite element models revealed that indentation stiffness was insensitive to variations of anisotropy in the plane of the surface layer of articular cartilage. Cartilage was modelled as a poroelastic material, consisting of separate fluid and solid phases, to simulate viscoelastic mechanical behaviours due to expression of water from the matrix upon loading. A poroelastic finite element model successfully replicated mechanical behaviours of cartilage in confined compression and indentation. Also demonstrated was sensitivity of indentation stiffness to indentor roughness and permeability, cartilage layer geometry and the displacement rate of the indentor. A plane strain poroelastic finite element model of a typical whole joint tested the hypothesis that whole joints are affected by hydraulic boundary conditions which exist along the contact surface. This model simulated a displacement controlled relaxation test Results showed that hydraulically sealed boundaries at the contacting interface of apposing cartilages are a mechanically admissible condition for transmission of joint forces developed during stress relaxation. Observation of transient tensile stresses in cartilage revealed that collagen appears to function as tissue reinforcement. Vertical stress distribution in the cartilage layer was similar in shape and behaviour to that found in numerical simulations of idealized indentation tests. This suggests that indentation testing is a valid means to simulate cartilage compression behaviours in vivo. The full joint model was modified to model joint articulation. Tensile stresses, developed near the contacting interface, demonstrated that superficial collagen has a function in joint articulation. The methods used in this dissertation show promise in further investigations of mechanical behaviours of joints and mechanisms of joint disease and repair.
Extension of Loop Quantum Gravity to Metric Theories beyond General Relativity
Creators: name: Ma, Yongge
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The successful background-independent quantization of Loop Quantum Gravity relies on the key observation that classical General Relativity can be cast into the connection-dynamical formalism with the structure group of SU(2). Due to this particular formalism, Loop Quantum Gravity was generally considered as a quantization scheme that applies only to General Relativity. However, we will show that the nonperturbative quantization procedure of Loop Quantum Gravity can be extended to a rather general class of metric theories of gravity, which have received increased attention recently due to motivations coming form cosmology and astrophysics. In particular, we will first introduce how to reformulate the 4-dimensional metric $f(R)$ theories of gravity, as well as Brans-Dicke theory, into connection-dynamical formalism with real SU(2) connections as configuration variables. Through these formalisms, we then outline the nonpertubative canonical quantization of the $f(R)$ theories and Brans-Dicke theory by extending the loop quantization scheme of General Relativity.
description: 10 pages; Proceedings of Loops'11, Madrid, submitted to Journal of Physics: Conference Series