112,331 research outputs found
Boundary one-point functions, scattering theory and vacuum solutions in integrable systems
No full textAn eigenvalue problem related to the non-linear sigma-model: analytical and numerical results
No full textAn eigenvalue problem relevant for the non-linear sigma model with singular metric is considered. We prove the existence of a non-degenerate pure point spectrum for all finite values of the size R of the system. In the infrared (IR) regime (large R) the eigenvalues admit a power series expansion around the IR critical point R --> infinity. We compute high order coefficients and prove that the series converges for all finite values of R. In the ultraviolet (UV) limit the spectrum condenses into a continuum spectrum with a set of residual bound states. The spectrum agrees nicely with the central charge computed by the thermodynamic Bethe ansatz method
The electrochemical behavior of iridium dioxide modified by ion implantation
No full textThermolytic Ir oxide films whose surface was modified by ion implantation of Ar and O ions were investigated electrochemically. Ion implantation is accompanied by changes in the space charge constituents and the emergence in the electrode surface layer of new active centers brought about mainly by radiation modification. The increase in the catalytic activity in the O evolution reaction at doped electrodes correlates with a part of the surface charge
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Bethe ansatz solution of the Fateev-Zamolodchikov quantum spin chain with boundary terms
No full textWe solve the Fateev-Zamolodchikov quantum spin chain (i.e., the spin-1
XXZ quantum Heisenberg chain) with a class of boundary terms by the quantum inverse scattering method. For a particular choice of boundary terms, the model has the quantum symmetry U
q
[SU (2)]
Influence of anions on oxygen/ozone evolution on PbO2/spe and PbO2/Ti electrodes in neutral pH media
No full textThe formation of O2/O3 on PbO2 from the electrolysis of water in neutral solutions is shown here to present some analogies and some differences with respect to the same process in acid media. The electrolyte composition affects the current efficiency for O3 formation (.eta.) and the cell potential (E) of a Membrel type electrochemical assembly. An improvement in .eta. and a decrease in E is observed upon addition of relatively low amounts of Na2SO4 or NaClO4 in pure water. We observe no effect of NaNO3 on either parameters. In agreement with literature data in acid solutions, F- causes an increase in both .eta. and E. The results of electrochemical kinetic investigations with electrodes of PbO2 electrodeposited on Ti confirm the above data. Current-potential curves constructed from measurements in NaNO3 show a region of Tafel linearity with slopes of 2RT/F and RT/F in the low and high currents range, respectively. Addition of Na2SO4 and NaClO4 to NaNO3 has an effect on the process at more positive potentials only: the RT/F slope decreases toward a value of RT/2F as the concentration of the "foreign" salt is increased. As an explanation of the observed behavior, the possibility is advanced that a step following the discharge of water is rate determining at high positive potentials with the adsorption of intermediates described by Temkin conditions. The composition of the electrolyte is expected to influence the yield of ozone formation by affecting the coverage and free energy of adsorbed oxygen intermediates
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
EUCLID - Integrable models and applications: from strings to condensed matter - Activity Year 2
No full textEUCLID is a Research Training Network funded by the European Commission's 5th Framework Improving Human Potential programme.
The central research objective is to deepen the understanding of the physics of integrability, identifying the fundamental mechanisms and developing applications in a variety of contexts, from string theory to condensed matter physics.
A copy of the network proposal is available as attachment. This provides details concerning the members of the collaboration together with a description of the proposed research and the training of young researchers.
The network contract (HPRN-CT-2002-00325) between the European Commission and network participants started on 1st October 2002 with a duration of 48 months.
The detailed work plan is also available as attachment.
2004 has been the second year of participation to this EU network.
A number of postdoctoral positions are appointed. In particular a two year position is appointed to Dr. Arpad Hegedus (hungarian) in Bologna beginning Oct 1, 2004.
Many conferences and schools have been organized, with partial support from the network. Up to Dec 2004, 1 workshop (6th Bologna workshop on CFT and Integrable Models) has been organized in Bologna and 1 official network meeting in Florence (2003) with participation of the Bologna group as organizer.
The coordinator is Prof. Ed Corrigan, of the Department of Mathematics of University of York, UK
Bologna participates as the coordinating site of a national node under the auspices of INFN, including also people in Firenze and Torino. This italian node has been coordinated by F. Ravanini.
The list of coordinators of the nodes of the network is:
* Ivan Todorov, INRNE-Sofia, Bulgaria
* Paul Sorba, CNRS-Annecy, France
* Jean-Michel Maillet, ENS-Lyon, France
* Vladimir Fateev, CNRS-Montpellier, France
* Michael Karowski, FU-Berlin, Germany
* Vladimir Rittenberg, University of Bonn, Germany
* László Palla, Eötvös Loránd University, Budapest, Hungary
* Francesco Ravanini, INFN-Bologna , Italy
* Giuseppe Mussardo, SISSA-Trieste, Italy
* J Luis Miramontes, University of Santiago de Compostela, Spain
* Patrick Dorey, Mathematical Sciences, University of Durham, UK
* Gérard Watts, Mathematics, King's College London, UK
In addition to these, some members of the following universities (contact names in brackets) are collaborating with the principal partners and are considered part of the above nodes:
* University of Mons-Hainaut (Jean Nuyts) with York
* CEN-Saclay (Denis Bernard) with CNRS-Annecy
* LPThE Paris VI University (Olivier Babelon) with ENS-Lyon
* University of Tours (Peter Forgacs) with CNRS-Montpellier
* University of Hannover (Michael Flohr) with Bonn
* University of Szeged (Laszlo Feher) and Nuclear and Particle Physics Research Laboratory of the Hungarian Academy of Sciences (Janos Balog) with Budapest
* University of Florence (Andrea Cappelli) and University of Torino (Michele Caselle), with Bologna
* University of Bilbao and IFT-Madrid (German Sierra) with Santiago
* Heriot-Watt University (Robert Weston) with Durham
* Universities of Cambridge (Jonathan Evans) and Swansea (Tim Hollowood) with KCL
* London - City University (Andreas Fring) with FU-Berlin
Further information about this activity can be found at the web site of the EUCLID network:
http://www-users.york.ac.uk/~ec9/fp5data.htm
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
JETP Letters V. 65, I .12
No full textJETP Letters -- June 25, 1997
Volume 65, Issue 12, pp. 895-950
On singularities in non-Abelian black holes
D. V. Gal'tsov, E. E. Donets, and M. Yu. Zotov
Full Text: PDF (93 kB)
Does the Unruh effect exist?
V. A. Belinskii, B. M. Karnakov, V. D. Mur, and N. B. Narozhnyi
Full Text: PDF (110 kB)
Optical orientation in p-doped semiconductor structures with a split valence band
E. P. German and A. V. Subashiev
Full Text: PDF (111 kB)
Cluster structure and superlattices in Co and Fe films
S. M. Zharkov, V. S. Zhigalov, L. I. Kveglis, Yu. V. Lisitsa, K. V. Renskaya, and G. I. Frolov
Full Text: PDF (535 kB)
Shift of the dip in the ultralow-frequency electric excitation spectrum of the Bridgman effect
E. G. Fateev
Full Text: PDF (89 kB)
A contribution to the theory of ferromagnetism in the Hubbard model with degeneracy
R. O. Zaitsev
Full Text: PDF (113 kB)
Instability of the two-dimensional metallic phase to a parallel magnetic field
V. M. Pudalov, G. Brunthaler, A. Prinz, and G. Bauer
Full Text: PDF (96 kB)
Characteristic features of the temperature dependence of the surface impedance of YBa2Cu3O6.95 single crystals
M. R. Trunin, A. A. Zhukov, G. A. Emel'chenko, and I. G. Naumenko
Full Text: PDF (107 kB)
On the structure and stability of two-dimensional dynamic solitons in ferromagnets
A. A. Zhmudskii and B. A. Ivanov
Full Text: PDF (101 kB)Archived web conten
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