cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Opportunities for management created by spatial structures : a case study of Finnish reindeer
Creators: name: Berkson, James Meyer
Publisher: name: University of British Columbia
Year: 2010

description: This study examines opportunities for renewable resource management when population data are collected by spatial subdivisions. In particular I look at potential applications for the design of management experiments, the distribution of monitoring resources, and the improvement of parameter estimation. Methods are developed to rank possible groupings of subdivisions for use as experimental units. Factors external to the experiment can cause differences between experimental units. Selecting subdivisions that have reacted similarly in the past to external factors could minimize the risk of external factors creating differences in experimental units. Methods are developed to identify subdivisions that could provide information about similar subdivisions when monitoring resources are low or when stratified sampling is being used. The use of these subdivisions as "index units" could notify managers of extremely good or bad years in a large number of subdivisions. Two methods developed by Walters (1986) provide innovative estimation techniques that can be used with subdivided populations. A Bayesian approach allows parameter estimates to be adjusted using a known distribution. Another approach allows similar subdivisions to be estimated jointly more accurately than would be possible individually. Not all renewable resource data sets provide reliable information for use with these applications. Data sets where there is little common variation, high levels of autocorrelation in the noise, or even modest amounts of measurement error are inappropriate for most methods. A series of steps is introduced for managers to test the reliability of the methods on their particular data sets. Data on Finnish reindeer (Rangifer tarandus tarandus) are used throughout the thesis to illustrate the methods. The reindeer data appear to be appropriate for these methods when tested using the steps developed. Possible experimental units and index units for monitoring are identified. Walters' (1986) methods of parameter estimation are used on the data set as well. The reindeer data show that subdivisions with similar external effects were located close to one another. This pattern was at least partially caused by the existence of extremely bad years occurring within geographic regions. The reindeer subdivisions are very highly managed and provide little evidence of any kind of density dependence. Managers could potentially benefit by conducting experiments to test the biological limits of the population growth rates and carrying capacities within subdivisions.
Comparing two perfect bases
Creators: name: Dranowski, Anne
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We study a class of varieties which generalize the classical orbital varieties of Joseph. We show that our generalized orbital varieties are the irreducible components of a Mirkovic-Vybornov slice to a nilpotent orbit, and can be labeled by semistandard Young tableaux. Furthermore, we prove that Mirkovic-Vilonen cycles are obtained by applying the Mirkovic-Vybornov isomorphism to generalized orbital varieties and taking a projective closure, refining Mirkovic and Vybornov's result. As a consequence, we are able to use the Lusztig datum of a Mirkovic--Vilonen cycle to determine the tableau labeling the generalized orbital variety which maps to it, and, hence, the ideal of the generalized orbital variety itself. By homogenizing we obtain equations for the cycle we started with, which is useful for computing various equivariant invariants such as equivariant multiplicity and multidegree. As an application, we show that in type $A_5$ the Mirkovic-Vilonen basis and Lusztig's dual semicanonical basis are not equal as perfect bases of the coordinate ring of the unipotent subgroup. This is significant because it shows that perfect bases are not unique. Our comparison relies heavily on the theory of measures developed in Baumann, Kamnitzer, and Knutson's MV Basis and DH Measures (2019), and we include what we need to be self-contained. Finally, we state a conjectural combinatorial "formula" for the ideal of a generalized orbital variety in terms of its tableau.
description: Author's 2020 PhD thesis. Overlaps with arXiv:1905.08174
Is Quantum Mechanics Incompatible with Newton's First Law
Creators: name: Rabinowitz, Mario
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Quantum mechanics (QM) clearly violates Newton's First Law of Motion (NFLM) in the quantum domain for one of the simplest problems, yielding an effect in a force-free region much like the Aharonov-Bohm effect. In addition, there is an incompatibility between the predictions of QM in the classical limit, and that of classical mechanics (CM) with respect to NFLM. A general argument is made that such a disparity may be found commonly for a wide variety of quantum predictions in the classical limit. Alternatives to the Schrodinger equation are considered that might avoid this problem. The meaning of the classical limit is examined. Critical views regarding QM by Schrodinger, Bohm, Bell, Clauser, and others are presented to provide a more complete perspective.
description: Paper has been revised to conform to published version
Chromospheric Activity in 55 Cancri: II. Theoretical Wave Studies versus Observations
Creators: name: Cuntz, M.
name: Schröder, K. -P.
name: Fawzy, D. E.
name: Ridden-Harper, A. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this study, we consider chromospheric heating models for 55 Cancri in conjunction with observations. The theoretical models, previously discussed in Paper I, are self-consistent, nonlinear and time-dependent ab-initio computations encompassing the generation, propagation, and dissipation of waves. Our focus is the consideration of both acoustic waves and longitudinal flux tube waves amounting to two-component chromosphere models. 55 Cancri, a K-type orange dwarf, is a star of low activity, as expected by its age, which also implies a relatively small magnetic filling factor. The Ca II K fluxes are computed (multi-ray treatment) assuming partial redistribution and time-dependent ionization. The theoretical Ca II H+K fluxes are subsequently compared with observations. It is found that for stages of lowest chromospheric activity the observed Ca II fluxes are akin, though not identical, to those obtained by acoustic heating, but agreement can be obtained if low levels of magnetic heating - consistent with the assumed photospheric magnetic filling factor - are considered as an additional component; this idea is in alignment with previous proposals conveyed in the literature.
description: 9 pages, 4 figures, 3 tables; accepted by Monthly Notices of the Royal Astronomical Society (MNRAS)
Submillimeter and Millimeter Masers
Creators: name: Humphreys, E. M. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Despite theoretical predictions of the existence of many submillimeter masers, and some pioneering observational discoveries over the past few decades, these lines have remained relatively unstudied due to (i) challenges associated with observing at shorter wavelength; and, (ii) lack of possibility of high (< 14'' at 345 GHz) angular resolution observations. With the advent of the SMA, the first submillimeter imaging array capable of sub-arcsecond resolution, APEX, and the promise of ALMA, opportunities are opening for performing new science with millimeter/submillmeter masers. In this talk, I will review recent work in the field - including extragalactic water millimeter masers, hydrogen recombination masers, submillimeter masers in star-forming regions, and in the envelopes of evolved stars - and discuss prospects for the future.
description: 10 pages, 2 figures, 2 tables; to appear in conference proceedings of IAU 242: Astrophysical Masers and Their Environments, held in Alice Springs, Australia (March 2007)
Bertrand Russell: The Committed Sceptic in Public Life
Creators: name: Callaghan, John
Publisher: name: Moving the Social
Year: 2015

description: Bertrand Russell came from a political family but was devoted to an academic life before 1914. It was the Great War which transformed him. He broke from the Liberal Party, began to regard himself as a socialist and became a prominent public intellectual, noted for his independence of mind. Throughout the rest of his long life he earned a living as a writer and public speaker, devoting at least as much time to politics and social questions as he did to philosophy and science. Though Russell’s intellectual gifts were exceptional his political odyssey was not. It illustrates the strength of liberalism and its permeability with socialism in twentieth century Britain, as well as the relatively strong tradition of dissent on matters of defence and foreign policy found within these overlapping political cultures.
description: Moving the Social, Vol 51 (2014): Lifes on the Left
Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
Creators: name: Vasudevan, R. V.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) The X-ray background can be used to constrain the accretion history of Supermassive Black Holes (SMBHs) in Active Galactic Nuclei (AGN). A knowledge of the hard X-ray bolometric correction, κ_{2-10keV} is a vital input into these studies. Variations in the disk emission in the UV have not previously been taken into account in calculating κ_{2-10keV}; we show that such variations are important by constructing optical--to--X-ray SEDs for 54 AGN. In particular, we use FUSE UV and X-ray data from the literature to constrain the disk emission as well as possible. Previous work has suggested a dependence of κ_{2-10keV} on AGN luminosity, but we find significant spread in κ_{2-10keV} with no simple dependence on luminosity. Populations such as Narrow-Line Seyfert 1 nuclei (NLS1s), Radio Loud and X-ray Weak AGN may have values of κ_{2-10keV} differing systematically from the rest of the AGN population. Other sources of uncertainty include intrinsic extinction in the optical--UV, X-ray and UV variability and uncertainties in SMBH mass estimates. Our results suggest a more well-defined relationship between κ_{2-10keV} and Eddington ratio in AGN, with a transitional region at an Eddington ratio of ~0.1, below which the bolometric correction is typically 15 - 25, and above which it is typically 40 - 70. We consider the potential implied parallels with the low/hard and high/soft states in Galactic Black Hole (GBH) accretion, and present bolometric corrections for the GBH binary GX 339-4 for comparison. Our findings reinforce previous studies proposing a multi-state description of AGN accretion analogous to that for GBH binaries. Future calculations of the SMBH mass density may need to account for the possible dependence of κ_{2-10keV} on Eddington ratio.
description: 19 pages, 16 figures, 3 tables. Accepted for publication in MNRAS
Towards a Comprehensive Fueling-Controlled Theory on the Growth of Massive Black Holes and Host Spheroids
Creators: name: Escala, Andres
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the relation between nuclear massive black holes and their host spheroid gravitational potential. Using AMR numerical simulations, we analyze how gas is transported in the nuclear (central kpc) regions of galaxies. We study the gas fueling onto the inner accretion disk (sub-pc scale) and the star formation in a massive nuclear disk like those generally found in proto-spheroids (ULIRGs, SCUBA Galaxies). These sub-pc resolution simulation of gas fueling that is mainly depleted by star formation naturally satisfy the `M_BH - $M_virial' relation, with a scatter considerably less than the observed one. We found a generalized version of Kennicutt-Schmidt Law for starbursts is satisfied, in which the total gas depletion rate (dot{M}_gas = dot{M}_BH + dot{M}_SF) is the one that scales as M_gas/t_orbital. We also found that the `M_BH - sigma' relation is a byproduct of the `M_BH - M_virial' relation in the fueling controlled scenario.
description: 12 pages, figures, submited to ApJ, email: andres@slac.stanford.edu
Hinode EUV Imaging Spectrometer Observations of Solar Active Region Dynamics
Creators: name: Mariska, John T.
name: Warren, Harry P.
name: Ugarte-Urra, Ignacio
name: Brooks, David H.
name: Williams, David R.
name: Hara, Hirohisa
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The EUV Imaging Spectrometer (EIS) on the Hinode satellite is capable of measuring emission line center positions for Gaussian line profiles to a fraction of a spectral pixel, resulting in relative solar Doppler-shift measurements with an accuracy of less than a km/s for strong lines. We show an example of the application of that capability to an active region sit-and-stare observation in which the EIS slit is placed at one location on the Sun and many exposures are taken while the spacecraft tracking keeps the same solar location within the slit. For the active region examined (NOAA 10930), we find that significant intensity and Doppler-shift fluctuations as a function of time are present at a number of locations. These fluctuations appear to be similar to those observed in high-temperature emission lines with other space-borne spectroscopic instruments. With its increased sensitivity over earlier spectrometers and its ability to image many emission lines simultaneously, EIS should provide significant new constraints on Doppler-shift oscillations in the corona.
description: 7 Pages, 7 figures
What’s New in the History of Social Movements?
Creators: name: Berger, Stefan
Publisher: name: Moving the Social
Year: 2015

description: Jürgen Schmidt, August Bebel: Kaiser der Arbeiter, Zurich: Rotpunkt, 2013, ISBN 9783858695383, pp. 285.


Axel Weipert, Das Rote Berlin. Eine Geschichte der Berliner Arbeiterbewegung 1830–1934, Berlin: Berliner Wissenschafts-Verlag, 2013, ISBN 9783830532422, pp. 251.


Matthew Johnson, Militarism and the British Left, 1902–1914, Basingstoke: Palgrave Mac-Millan, 2013, ISBN 9781137274120, pp. xi+247.


Christopher Read, War and Revolution in Russia, 1914–1922: the Collapse of Tsarism and the Establishment of Soviet Power, Basingstoke: Palgrave MacMillan, 2013, ISBN 9780230239869, xiv+247.


Domink Rigoll, Staatsschutz in Westdeutschland. Von der Entnazifizierung zur Extremistenabwehr, Göttingen: Wallstein, 2013, ISBN 9783835310766, pp. 524.


Arne Hordt, Von Scargill zu Blair? Der britische Bergarbeiterstreik 1984–85 als Problem einer europäischen Zeitgeschichtsschreibung, Frankfurt am Main: Peter Lang, 2013, ISBN 9783631625118, pp. 124.


Andrea Hajek, Negotiating Memories of Protest in Western Europe. The Case of Italy, Basingstoke: Palgrave MacMillan, 2013, ISBN 9781137263773, pp. xi+220.


Cristina Flesher Fominaya and Laurence Cox (eds.), Understanding European Movements: New Social Movements, Global Justice Struggles, Anti-Austerity Protest, London: Routledge, 2013, ISBN 9780415638791, pp. xix+263.


Colin Barker, Laurence Cox, John Krinsky and Alf Gunvald Nilsen (eds.), Marxism and Social Movements, Leiden: Brill, 2013, ISBN 9789004211759, pp. vii+473.
description: Moving the Social, Vol 51 (2014): Lifes on the Left
An Autobiographical Pact: The Memoirs of Marshal Georgy Zhukov
Creators: name: Roberts, Geoffrey
Publisher: name: Moving the Social
Year: 2015

description: The “autobiographical pact” is what Philippe Lejeune calls the commitment made by autobiographers and memoirists to speak truthfully about themselves. In his memoirs Marshal Georgy Zhukov (1896–1974) committed to tell the truth about his life and the great events in which he took part and went to inordinate lengths to persuade his readers they could trust what he wrote. This article shows that Zhukov’s autobiographical pact was severely compromised by the process of censorship undergone by the memoirs prior to publication. In post-Soviet times the memoirs were reissued in editions that restored many cuts and changes imposed by the censors. While this restored Zhukov’s original autobiographical pact with his readers it also accentuated the distortions resulting from his striving to set the record straight in his favour. The article also locates Zhukov’s memoirs in the Soviet autobiographising tradition explored by Jochen Hellbeck and others. Like all officially published memoirs Zhukov’s story was intended to celebrate the Soviet project. As a committed communist soldier Zhukov was willing to contribute to this endeavour but not at the expense of his individuality or of the truth as he saw it. As Roy Pascal argued, while the truth in memoirs and autobiography is often elusive, it is not unfathomable.
description: Moving the Social, Vol 51 (2014): Lifes on the Left
Review Article: Oil and Social Movements
Creators: name: Graf, Rüdiger
Publisher: name: Moving the Social
Year: 2015

description: Timothy Mitchell: Carbon Democracy: Political Power in the Age of Oil, London/New York: Verso, 2011, ISBN 13: 978 – 1781681169, 288 pp.


C. I. Obi/Siri Aas Rustad: Oil and Insurgency in the Niger Delta. Managing the Complex Politics of Petro-Violence, London/New York: Zed Books, 2011, ISBN: 9781848138070, 255 pp.


Michael Lewin Ross: The Oil Curse: How Petroleum Wealth Shapes the Development of Nations, New York: Princeton University Press, 2012, ISBN: 9780691159638, 312 pp.


Brian Black: Crude Reality: Petroleum in World History, Lanham et. al.: Rowman & Littlefield Publishers, 2012, ISBN: 978 – 0742556546, 288 pp.
description: Moving the Social, Vol 52 (2014): Essays on social history and the history of social movements
The position of women in post- revolutionary Tunisia and their role in political decision-making processes: Between social movements, frustrations and administrative routine?
Creators: name: Gondorová, Eva
Publisher: name: Moving the Social
Year: 2015

description: The Arab Spring, including the Jasmine Revolution in Tunisia, displayed a strong female presence and the active involvement of women voicing their dissatisfaction with authoritarian regimes. Even though the contribution of women during the Jasmine Revolution is beyond dispute, the question regarding the role of women in post authoritarian Tunisia has remained unanswered. It further remains debatable if the active involvement of women in the revolution has been transformed into a stronger societal position and greater influence in political decision-making processes for women in post-revolutionary Tunisia. The article analyses the repercussions of the Jasmine Revolution, and its context, on subsequent discourses regarding the position of women in post-authoritarian Tunisian society and on their involvement in political decision-making processes after Ben Ali’s departure. Through the course of the article the outlined theoretical approaches discussing the role of women in post-conflict society and in political decision-making processes are contrasted with the interviews conducted with high-ranking women in Tunisian administration mapping the first year of the transition process after the Jasmine Revolution with a particular focus on the role of women in post revolutionary Tunisia.
description: Moving the Social, Vol 52 (2014): Essays on social history and the history of social movements
Human rights challenged by European policy responses to irregular migration
Creators: name: Dreyer, Domenica
Publisher: name: Moving the Social
Year: 2015

description: Irregular migration has become a particular challenge for the European Union (EU) in the 21st century since thousands of people cross borders without legal permits and thereby undercut the sovereign state. Yet, many of these migrants are legitimate asylum-seekers with international and EU law legalising their irregular border crossing. This article argues that international and EU human rights and refugee law have only a limited impact on the state’s sovereign immigration and asylum policies at the cost of individuals’ human rights. At the example of the case study countries Italy and Malta, the lawfulness of two common policy responses – namely return and detention – is analysed on the basis of European and international law. The challenged human rights are freedom from torture and inhuman or degrading treatment extending to an effective right to seek asylum and the non-refoulement principle in refugee law.
description: Moving the Social, Vol 52 (2014): Essays on social history and the history of social movements
Atomic-layer Rashba-type superconductor protected by dynamic spin-momentum locking
Creators: name: Yoshizawa, Shunsuke
name: Kobayashi, Takahiro
name: Nakata, Yoshitaka
name: Yaji, Koichiro
name: Yokota, Kenta
name: Komori, Fumio
name: Shin, Shik
name: Sakamoto, Kazuyuki
name: Uchihashi, Takashi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin-momentum locking is essential to the spin-split Fermi surfaces of inversion-symmetry broken materials, which are caused by either Rashba-type or Zeeman-type spin-orbit coupling (SOC). While the effect of Zeeman-type SOC on superconductivity has experimentally been shown recently, that of Rashba-type SOC remains elusive. Here we report on convincing evidence for the critical role of the spin-momentum locking on crystalline atomic-layer superconductors on surfaces, for which the presence of the Rashba-type SOC is demonstrated. In-situ electron transport measurements reveal that in-plane upper critical magnetic field is anomalously enhanced, reaching approximately three times the Pauli limit at $T = 0$. Our quantitative analysis clarifies that dynamic spin-momentum locking, a mechanism where spin is forced to flip at every elastic electron scattering, suppresses the Cooper pair-breaking parameter by orders of magnitude and thereby protects superconductivity. The present result provides a new insight into how superconductivity can survive the detrimental effects of strong magnetic fields and exchange interactions.
description: This is a post-peer-review, pre-copyedit version of an article published in Nature Communications. The final authenticated version is available online at: http://dx.doi.org/10.1038/s41467-021-21642-1
Magnetic turbulence production by streaming cosmic rays upstream of SNR shocks
Creators: name: Niemiec, Jacek
name: Pohl, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present preliminary results of Particle-In-Cell simulations of magnetic turbulence production by isotropic cosmic-ray ions streaming upstream of supernova remnant shocks. The studies aim at testing the MHD predictions by Bell (2004, 2005) of a strong amplification of short-wavelength nonresonant wave modes and at studying the subsequent evolution of the magnetic turbulence and its backreaction on cosmic ray trajectories. The detailed knowledge of the upstream turbulence properties is crucial to ascertain all aspects of the shock acceleration process - the transport properties of cosmic rays, the shock structure, thermal particle injection and heating processes. An amplification of magnetic field would also facilitate the acceleration of particles beyond the "knee" in the cosmic-ray spectrum. Our kinetic approach is particularly suited to address the backreaction on the cosmic rays, and it allows us to test Bell's prediction of the eventual formation of extended filamentary structure in the cosmic-ray distribution and also to arrive at a reliable estimate of the total saturation magnetic-field level. The parameters chosen for the simulations are favorable for the rapid excitation of purely growing modes. We confirm the generation of the turbulent magnetic field due to the drift of cosmic-ray ions in the upstream plasma, but show that the growth rate of the field perturbations is much slower than estimated using the MHD approach and the amplitude of the turbulence saturates at about dB/B~1. The magnetic field also remains below equipartition with the upstream plasma.
description: 4 pages, 3 figures, Proceedings of the 30th ICRC, Merida, Mexico 2007
Strongly-resonant p-wave superfluids
Creators: name: Levinsen, J.
name: Cooper, N.
name: Gurarie, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study theoretically a dilute gas of identical fermions interacting via a p-wave resonance. We show that, depending on the microscopic physics, there are two distinct regimes of p-wave resonant superfluids, which we term "weak" and "strong". Although expected naively to form a BCS-BEC superfluid, a strongly-resonant p-wave superfluid is in fact unstable towards the formation of a gas of fermionic triplets. We examine this instability and estimate the lifetime of the p-wave molecules due to the collisional relaxation into triplets. We discuss consequences for the experimental achievement of p-wave superfluids in both weakly- and strongly-resonant regimes.
Qubit Entanglement Driven by Remote Optical Fields
Creators: name: Yonac, Muhammed
name: Eberly, Joseph H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the entanglement between two qubits, supposed to be remotely located and driven by independent quantized optical fields. No interaction is allowed between the qubits, but their degree of entanglement changes as a function of time. We report a collapse and revival of entanglement that is similar to the collapse and revival of single-atom properties in cavity QED.
description: v3, major changes, published in Optics Letters
Coulomb integrals for the SL(2,R) WZNW model
Creators: name: Iguri, Sergio
name: Nunez, Carmen
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the Coulomb gas computation of three-point functions in the SL(2,R) WZNW model and obtain explicit expressions for generic states. These amplitudes have been computed in the past by this and other methods but the analytic continuation in the number of screening charges required by the Coulomb gas formalism had only been performed in particular cases. After showing that ghost contributions to the correlators can be generally expressed in terms of Schur polynomials we solve Aomoto integrals in the complex plane, a new set of multiple integrals of Dotsenko-Fateev type. We then make use of monodromy invariance to analytically continue the number of screening operators and prove that this procedure gives results in complete agreement with the amplitudes obtained from the bootstrap approach. We also compute a four-point function involving a spectral flow operator and we verify that it leads to the one unit spectral flow three-point function according to a prescription previously proposed in the literature. In addition, we present an alternative method to obtain spectral flow non-conserving n-point functions through well defined operators and we prove that it reproduces the exact correlators for n=3. Independence of the result on the insertion points of these operators suggests that it is possible to violate winding number conservation modifying the background charge.
description: Improved presentation. New section on spectral flow violating correlators and computation of a four-point function
Analysis of the structural proteins of rubella virus
Creators: name: Berkowitz, Cheryl Anne
Publisher: name: University of British Columbia
Year: 2010

description: Complications of rubella virus infection, including congenital rubella syndrome and the association of rubella virus with joint inflammation, emphasize the need for continued research on rubella virus. The finding that the association of rubella virus infection with joint manifestations is more pronounced with wild strains than with vaccine strains suggested the possibility of strain variation. Several different techniques have been employed in order to compare six rubella virus strains and identify variations in their structural proteins. Differences in biological activities were detected, including the extent of virus production and the ability of various cell types to support replication of rubella virus (tissue tropism). However, the strains were shown to have remarkably similar electrophoretic patterns. Variation appeared to result from alterations in glycosylation. Efforts to isolate the protein components of the two envelope glycoproteins were unsuccessful, and it was therefore not possible to localize variation to either the protein or the carbohydrate components. Future work employing more sensitive methods for examination of fine molecular structure and the correlation of these structures with biological activity will further our understanding of the pathogenesis of rubella virus infection.
Temperature surpasses the effects of velocity and turbulence on swimming performance of invasive non-native fish species (Lepomis gibbosus and Pseudorasbora parva): Supplementary material from Temperature surpasses the effects of velocity and turbulence on swimming performance of two invasive non-native fish species
Creators: name: Muhawenimana, V.
name: J. R. Thomas
name: C. A. M. E. Wilson
name: J. Nefjodova
name: A. C. Chapman
name: F. C. Williams
name: D. G. Davies
name: S. W. Griffiths
name: Cable, J.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Environmental Science
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Supplementary figures
title: Verschlüsselungspolitik der USA: Vom Clipper-Chip zu Edward Snowden
Creators: name: Reuter, Christian
name: Riebe, Thea
name: Imperatori, Philipp
Publisher: name: Forum InformatikerInnen für Frieden und  gesellschaftliche Verantwortung e. V. (FIfF)
Year: 2021

description: Mit der zunehmenden Bedeutung des Internets, vernetzter Kommunikation und der daraus resultierenden Notwendigkeit der Verwendung von Verschlüsselungstechniken für vertrauliche Daten hat sich die Regulierung von Verschlüsselung verändert. Die USA, in denen die größten IT-Unternehmen ihre Produkte entwickeln, haben ihren Einfluss auf diese Unternehmen durch Exportbeschränkungen kontrolliert und haben somit einen besonderen Zugang zur Kommunikationstechnologie von Menschen auf der ganzen Welt. Dieser Artikel gibt einen Einblick in die Politik bis zum Jahr 2000, in welchem sich eine deutliche Liberalisierung des Umgangs mit Kryptographie zeigte. Im Widerspruch dazu stehen die Veröffentlichungen Edward Snowdens, welche Aufschluss über die heutige Agenda der Dual-Use-Regulierung von Kryptographie geben.
Discovering Trustworthy Data Repositories with re3data – the Registry of Research Data Repositories
Creators: name: Weisweiler, Nina Leonie
Publisher: name: Zenodo
Year: 2021
Subjects: Research Data Repositories
re3data
re3data COREF Project
FAIR Research Data

description: The global registry for research data repositories - re3data - lists over 2700 digital repositories across all scientific disciplines (as of December 2021). The service provides an extensive description of repositories based on a detailed metadata schema, the updated version of which was recently published [1]. It promotes open science practices and the visibility of science-driven open infrastructures. A variety of funders, publishers, and scientific organizations around the world refer to re3data within their guidelines and policies, recommending it as a trusted service to researchers looking for appropriate repositories for storage and discovery of research data [2,3]. The re3data web interface and API enable end users and third-party providers to discover the largest index of research data repositories in the world. In January 2020, the project "re3data COREF" (Community Driven Open Reference for Research Data Repositories) [4] started, funded by the German Research Foundation (DFG) for three years, with the goal to further develop and improve the registry. The presentation introduces the re3data service and gives an overview of the ongoing project work, including a short introduction to the recently published “Conceptual Model for User Stories” [5], which is intended to help the project team recalibrate re3data according to current and future needs of the community. [1] Strecker, D. et al. (2021) ‘Metadata Schema for the Description of Research Data Repositories: Version 3.1’. https://doi.org/10.48440/re3.010 [2] Kindling, M. et al. (2017) ‘The Landscape of Research Data Repositories in 2015: a Re3data Analysis’, D-Lib Magazine, 23(3/4). https://doi.org/10.1045/march2017-kindling [3] Witt, M. et al. (2019) ‘Connecting Researchers to Data Repositories in the Earth, Space, and Environmental Sciences’, in Manghi, P., Candela, L., and Silvello, G. (eds) Digital Libraries: Supporting Open Science. Cham: Springer International Publishing, pp. 86–96. https://doi.org/10.1007/978-3-030-11226-4_7 [4] https://coref.project.re3data.org/project [5] Vierkant, P. et al. (2021): re3data Conceptual Model for User Stories’. https://doi.org/10.48440/re3.012
ЖАМОАТ ЖОЙИДА ЮРИШ-ТУРИШ ҚОИДАЛАРИГА АМАЛ ҚИЛИШНИНГ – ЯНГИ ЎЗБЕКИСТОН ИМИДЖИГА ТАЪСИРИ
Creators: name: Саидов, Жасурбек
Publisher: name: Zenodo
Year: 2023

description: Мазкур мақолада жамоат жойларида фуқароларнинг юриш-туриш қоидаларини такомиллаштириш зарурати миллий ва ҳорижий тажриба асосида ўрганилди. Шунингдек, жамоат жойларида жамоат тартибига риоя этиш, бу орқали аҳолининг миллий қадриятларимиз ва одоб-аҳлоқ қоидаларига риоя этишларини таъминлаш, мамлакатимиз имиджини янада яхшилаш, бу борадаги айрим назарий ва амалий муаммоли масала ёритилган бўлиб, шундан келиб чиқиб, Ўзбекистон Республикаси Маъмурий жавобгарлик тўғрисидаги кодексига ўзгартириш ва қўшимчалар киритиш бўйича таклиф ва тавсиялар ишлаб чиқилган.
Putting Metadata to Work
Creators: name: Rittman, Martyn
Publisher: name: Zenodo
Year: 2021
Subjects: principles for open scholarly infrastructure
metadata

description: At Crossref we love open metadata. We are passionate about collecting it and earlier this year committed ourselves to the Principles of Open Scholarly Infrastructure to ensure that we can hold ourselves to the highest standards in making it persistently and openly available. Collecting identifiers is only a first step; collecting high quality metadata is the next crucial step; beyond that, we explore how different scholarly outputs fit together and relate to each other. Crossref’s metadata is open, standardized and machine readable. So it is very useful to many organizations that build services and tools on top of the open infrastructure we provide making content more discoverable. Reproducibility is critical. Researchers need to be able to build upon each others' work. Verifying and reproducing the results from earlier work is helped by metadata such as links to funding, protocols, research data, and peer review reports help to create a complete picture of a work. The aim is to advance knowledge by making the increasingly diverse landscape of scholarly output easy to navigate. In this poster/lightning talk, we present how we are seeking to represent the data we have in open and usable ways.
Liquid-Liquid Critical Point in Phosphorus
Creators: name: Yang, Manyi
name: Karmakar, Tarak
name: Parrinello, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The study of liquid-liquid phase transition has attracted considerable attention. One interesting example of such phenomenon is phosphorus for which the existence a first-order phase transition between a low density insulating molecular phase and a conducting polymeric phase has been experimentally established. In this paper, we model this transition by an ab-initio quality molecular dynamics simulation and explore a large portion of the liquid section of the phase diagram. We draw the liquid-liquid coexistence curve and determine that it terminates into a second-order critical point. Close to the critical point, large coupled structure and electronic structure fluctuations are observed.
description: 6 pages and 5 figures
title: Resilience in Security and Crises through Adaptions and Transitions
Creators: name: Kalle, Timo
name: Kaufhold, Marc-André
name: Kuntke, Franz
name: Reuter, Christian
name: Rizk, Amr
name: Steinmetz, Ralf
Publisher: name: Gesellschaft für Informatik
Year: 2021

description: Currently, there is a tremendous number of communication technology and systems in use. Not only in the private user space, but also in business operations and societal areas, they are deeply involved: Ranging from messaging services or navigation over (critical) SCADA systems to whole digital cities and communities. Consequently, the view on communication networks in security and particularly crisis scenarios becomes inevitable. This paper examines the notions of resilience, adaption and transition within communication networks with a specific focus on crises. Based on a structured literature review, the fundamentals of resilience and communication networks are introduced. The paper then discusses the characteristics of (a) evolvability, accessibility, usability and diversity as well as (b) self-organization, -management, -optimization, - monitoring, -healing and -protection for communication network resilience. Finally, it outlines challenges and potentials of communication network resilience based in the use cases of security and crises.
Hopping transport of interacting carriers in disordered organic materials
Creators: name: Novikov, Sergey V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Computer simulation of the hopping charge transport in disordered organic materials has been carried out explicitly taking into account charge-charge interactions. This approach provides a possibility to take into account dynamic correlations that are neglected by more traditional approaches like mean field theory. It was found that the effect of interaction is no less significant than the usually considered effect of filling of deep states by non-interacting carriers. It was found too that carrier mobility generally increases with the increase of carrier density, but the effect of interaction is opposite for two models of disordered organic materials: for the non-correlated random distribution of energies with Gaussian DOS mobility decreases with the increase of the interaction strength, while for the model with long range correlated disorder mobility increases with the increase of interaction strength.
description: 6 pages, 5 figures, extended version from the conference TIDS12
Τόξα, βέλη και φαρέτρες στον αρχαίο ελληνικό κόσμο
Creators: name: Μπέλλας, Ιωάννης Ν.
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Τόξα
Βέλη
Αιχμές
Φαρέτρες
Bows
Arrows
Arrowheads
Quivers

description: Η παρούσα διδακτορική διατριβή επιδιώκει να εξετάσει τα τόξα τα βέλη και τις φαρέτρες, τα τρία αυτά στοιχεία που στο σύνολό τους αποτελούν ένα όπλο, το τόξο, στο χώρο όπου εκτεινόταν ο αρχαίος ελληνικός κόσμος και σε χρονικό πλαίσιο που κυμαίνεται από τα γεωμετρικά μέχρι τα ελληνιστικά χρόνια. Αρχικά εξετάστηκε το τόξο μέσα από την εικονογραφία και τις γραπτές πηγές λόγω της απουσίας των υλικών καταλοίπων. Επιχειρήθηκε η κατηγοριοποίησή του με βάση το σχήμα, το υλικό κατασκευής, το μέγεθος και τον τρόπο λειτουργίας του. Παρόμοια διαδικασία τηρήθηκε και για τις φαρέτρες, ενώ για τα βέλη και κυρίως τις αιχμές από τις οποίες διατηρούνται πολλά υλικά κατάλοιπα καταβλήθηκε προσπάθεια να μελετηθεί το σύνολο του δημοσιευμένου και μέρος του αδημοσίευτου υλικού. Στο τελευταίο κεφάλαιο αξιοποιώντας τα παραπάνω στοιχεία έγινε συμπερασματικά μια συνολική εξέταση που κυρίως επικεντρώθηκε στην εξέλιξη της τοξευτικής στον αρχαίο ελληνικό κόσμο.
description: The present PhD thesis aims to study bows, arrows and quivers, the three elements, which collectively comprise a weapon, the bow, in the area where the ancient Greek world stretched and in a time frame ranging from the Geometric to the Hellenistic periods. Due to the absence of material remains the bow was studied through iconography and ancient literature. Based on factors, such as shape, construction material, size and mode of operation, an attempt has been made for classification. A similar procedure was also followed for quivers, while for the arrows and especially the arrowheads, for whom we have many material remains, it was attempted the study of whole of the published and part of the unpublished material. The final chapter on the basis of the above elements consists of a comprehensive examination of the evolution of archery in the ancient Greek world.
Two-parameter scaling of correlation functions near continuous phase transitions
Creators: name: Hasselmann, Nils
name: Sinner, Andreas
name: Kopietz, Peter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the order parameter correlation function in the vicinity of continuous phase transitions using a two-parameter scaling form G(k) = k_c^{-2} g(kξ,k/k_c), where k is the wave-vector, ξis the correlation length, and the interaction-dependent non-universal momentum scale k_c remains finite at the critical fixed point. The correlation function describes the entire critical regime and captures the classical to critical crossover. One-parameter scaling is recovered only in the limit k/k_c->0. We present an approximate calculation of g(x,y) for the Ising universality class using the functional renormalization group.
description: 4 pages, 5 figures, revised version, to appear as Rapid Communication in Phys.Rev.E
Dynamics of domain walls in magnetic nanostrips
Creators: name: Tretiakov, O. A.
name: Clarke, D.
name: Chern, Gia-Wei
name: Bazaliy, Ya. B.
name: Tchernyshyov, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We express dynamics of domain walls in ferromagnetic nanowires in terms of collective coordinates generalizing Thiele's steady-state results. For weak external perturbations the dynamics is dominated by a few soft modes. The general approach is illustrated on the example of a vortex wall relevant to recent experiments with flat nanowires. A two-mode approximation gives a quantitatively accurate description of both the steady viscous motion of the wall in weak magnetic fields and its oscillatory behavior in moderately high fields above the Walker breakdown.
description: 4 pages, update to published version
Construction of idempotent 2-cocycles
Creators: name: Λαμπράκης, Χρήστος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Crossed product algebras
Weak 2-cocycle
Weak crossed product algebra
Semigroups
Άλγεβρες σταυρωτού γινομένου
Ασθενείς 2-συν-κύκλοι
Άλγεβρες ασθενούς σταυρωτού γινομένου
Ημιομάδες

description: Let L/K be a finite Galois field extension with Galois group G. Let f be a weak 2-cocycle and Af be the associated weak crossed product K-algebra. We construct idempotent 2-cocycles using partitions of G, ordered sets of elements of G which we call generators of elements σ such that uσ belong to Jf and functions from G to a totally ordered monoid with minimum element. As application we calculate the principal ideals of Af . Also for a complete discrete valuation ring R with quotient field K, L/K a finite Galois field extension and S the integral closure of R in L, we define a special type of weak crossed product orders on S*.
description: Έστω L/K μία πεπερασμένη επέκταση σωμάτων με ομάδα του Galois G. Έστω f ένας ασθενής 2-συν-κύκλος και Af η αντίστοιχη K-άλγεβρα ασθενούς σταυρωτού γινομένου. Κατασκευάζουμε ταυτοδύναμους 2-συν-κύκλους χρησιμοποιώντας διαμερίσεις της G, διατεταγμένα σύνολα στοιχείων της G τα οποία καλούμε γεννήτορες στοιχείων της G τέτοια ώστε uσ να ανήκει στο Jf και συναρτήσεις από την G σε ένα ολικά διατεταγμένο μονοειδές με ελάχιστο στοιχείο. Ως εφαρμογή υπολογίζουμε τα κύρια ιδεώδη της Af. Επιπλέον, για έναν πλήρη δακτύλιο διακριτής εκτίμησης R με σώμα κλασμάτων K, L/K μία πεπερασμένη επέκταση σωμάτων και S το ακέραιο κάλυμμα του R στο L, ορίζουμε έναν ειδικό τύπο ασθενών τάξεων σταυρωτού γινομένου στον S*.
Organizing, describing, analyzing, and retrieving the dissertation literature in special education : a case study using microcomputer technology to develop a personal information retrieval system
Creators: name: Frie, Gudrun Louise
Publisher: name: University of British Columbia
Year: 2010

description: This study analyzed special education dissertations published in Dissertation Abstracts International, 1980 to 1985. Keywords, describing the substantive content of each abstract and title, were assigned according to principles used in controlled and natural language indexing. A bibliometric analysis was performed to identify a core vocabulary representing frequent concepts and ideas and the most productive institutions awarding doctorates in special education. Descriptive and bivariate (chi square) analyses were also conducted illustrating relationships between demographic variables: year of completion, sex of author, degree awarded, page length, institution; and content variables: category of special education, research type, and data analysis technique. Finally, a microcomputer information retrieval system was developed to provide better access to the dissertation literature. Results indicated that a greater number of women choose to do doctoral work, graduate with Ph.D. degrees and write longer theses. The keyword index illustrated a wide diversity of topics being pursued. The microcomputer personal information retrieval system is multifaceted, is available for searching, may describe the vocabulary, and will accommodate the growing dissertation base in special education.
Valley-related multiple Hall effect in single-layer VSi2P4
Creators: name: Feng, Xiangyu
name: Xu, Xilong
name: He, Zhonglin
name: Peng, Rui
name: Dai, Ying
name: Huang, Baibiao
name: Ma, Yandong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: 2D materials with valley-related multiple Hall effect are both fundamentally intriguing and practically appealing to explore novel phenomena and applications, but have been largely overlooked up to date. Here, using first-principles calculations, we present that valley related multiple Hall effect can exist in single-layer VSi2P4. We identify single-layer VSi2P4 as a ferromagnetic semiconductor with out-of-plane magnetization and valley physics. Arising from the joint effect of inversion symmetry breaking and time reversal symmetry breaking, the exotic spontaneous valley polarization occurs in single-layer VSi2P4, thus facilitating the observation of anomalous valley Hall effect. Moreover, under external strain, band inversion can occur at only one of the valleys of single-layer VSi2P4, enabling the long-sought valley-polarized quantum anomalous Hall effect, and meanwhile the anomalous valley Hall effect is well preserved.. Our work not only enriches the research on valley-related multiple Hall effect, but also opens a new avenue for exploring valley-polarized quantum anomalous Hall effect.