Large stock price changes: volume or liquidity?We analyze large stock price changes of more than five standard deviations for i) TAQ data for the year 1997 and ii) order book data from the Island ECN for the year 2002. We argue that large price…Philipp Weber, Bernd Rosenow·Jan 8, 2004SaveLearn
Does the interaction potential determine both the fragility of a liquid and the vibrational properties of its glassy state?By performing molecular dynamics simulations of binary Lennard-Jones systems with three different potentials, we show that increase of anharmonicity and capacity for intermolecular coupling of the…P. Bordat, F. Affouard, M. Descamps et al.·Jan 8, 2004SaveLearn
Coalescence of nanoscale metal clusters: Molecular-dynamics studyWe study the coalescence of nanoscale metal clusters in an inert-gas atmosphere using constant-energy molecular dynamics. The coalescence proceeds via atomic diffusion with the release of surface…Shaun C. Hendy, Simon A. Brown, Michael Hyslop·Jan 8, 2004SaveLearn
Simulation of Phonon-Polariton Generation and Propagation in Ferroelectric LiNbO3 CrystalsWe simulate propagation of phonon-polaritons (admixtures of polar lattice vibrations and electromagnetic waves) in ferroelectric LiNbO3 with a model that consists of a spatially periodic array of…David W. Ward, Eric Statz, Nikolay Stoyanov et al.·Jan 7, 2004SaveLearn
Optimised Traffic Flow at a Single Intersection: Traffic Responsive signalisationWe propose a stochastic model for the intersection of two urban streets. The vehicular traffic at the intersection is controlled by a set of traffic lights which can be operated subject to fix-time…M. Ebrahim Fouladvand, Zeinab Sadjadi, M. Reza Shaebani·Jan 7, 2004SaveLearn
Lattice dynamical study of optical modes in Tl2Mn2O7 and In2Mn2O7 pyrochloresThe Raman, IR and force field have been investigated for A2Mn2O7 (A= Tl, In) by means of a short-range force constant model which includes four stretching and four bending force constants. Unusual…Sonal Brown, H. C. Gupta, J. A. Alonso et al.·Jan 7, 2004SaveLearn
The Social Architecture of CapitalismA dynamic model of the social relations between workers and capitalists is introduced. The model is deduced from the assumption that the law of value is an organising principle of modern economies.…Ian Wright·Jan 6, 2004SaveLearn
Phonon-Polariton Propagation, Guidance, and Control in Bulk and Patterned Thin Film Ferroelectric CrystalsUsing time resolved ultrafast spectroscopy, we have demonstrated that the far infrared (FIR) excitations in ferroelectric crystals may be modified through an arsenal of control techniques from the…David W. Ward, Eric Statz, Jaime D. Beers et al.·Jan 6, 2004SaveLearn
The Role of Multiferroics in the Negative Index of RefractionWe explore the possibility of realizing intrinsic far infrared negative index materials (NIM) in multiferroic crystals (crystals simultaneously possessing a ferroelectric and ferromagnetic phase)…David W. Ward, Eric Statz, Kevin J. Webb et al.·Jan 6, 2004SaveLearn
Resonance magneto-resistance in double barrier structure with spin-valveThe conductance and tunnel magneto-resistance (TMR) of the double barrier magnetic tunnel junction with spin-valve sandwich (F/P/F) inserted between two insulating barrier, are theoretically…N. Ryzhanova, G. Reiss, F. Kanjouri et al.·Jan 5, 2004SaveLearn
Excitation of Spin Waves in Superconducting FerromagnetsThis Letter presents a theoretical analysis of propagation of spin waves in a superconducting ferromagnet. The surface impedance was calculated for the case when the magnetization is normal to the…V. Braude, E. B. Sonin·Dec 31, 2003SaveLearn
Topology, Quasiperiodic functions and the Transport phenomenaIn this article we give the basic concept of the "Topological Numbers" in theory of quasiperiodic functions. The main attention is paid to apperance of such values in transport phenomena…A. Ya. Maltsev, S. P. Novikov·Dec 30, 2003SaveLearn
Comment on "Dielectric behavior of paraelectric KTaO3, CaTiO3, and (Ln1/2Na1/2)TiO3 under a dc electric field"Chen Ang, Bhalla and Cross [Phys. Rev. B 64, 184104 (2001)] have studied the low-frequency (20 Hz -- 100 kHz) dielectric dispersion of the KTaO3 crystal under a dc electric field. Performing fits of…A. Pashkin, V. Zelezny, M. Savinov et al.·Dec 30, 2003SaveLearn
Properties of Foreshocks and Aftershocks of the Non-Conservative SOC Olami-Feder-Christensen Model: Triggered or Critical Earthquakes?Following Hergarten and Neugebauer [2002] who discovered aftershock and foreshock sequences in the Olami-Feder-Christensen (OFC) discrete block-spring earthquake model, we investigate to what degree…A. Helmstetter, S. Hergarten, D. Sornette·Dec 30, 2003SaveLearn
Influence of Co3+ spin-state on optical properties of LaCoO3 and HoCoO3Optical properties of the isoelectronic compounds LaCoO3 and HoCoO3 has been experimentally and theoretically investigated. We've measured the real ε1(ω) and imaginary ε2(ω) parts of…L. V. Nomerovannaya, A. A. Makhnev, S. V. Streltsov et al.·Dec 29, 2003SaveLearn
Bankruptcy as an exit mechanism for systems with a variable number of componentsDynamical systems with components whose sizes evolve according to multiplicative stochastic rules have been recently combined with entry and exit processes. We show that the assumptions usually made…Corrado Di Guilmi, Edoardo Gaffeo, Mauro Gallegati·Dec 29, 2003SaveLearn
Reduction of the Three Dimensional Schrodinger Equation for Multilayered FilmsIn this paper, we present a method for reducing the three dimensional Schrodinger equation to study confined metallic states, such as quantum well states, in a multilayer film geometry. While…C. Abbott, M. Rasamny, G. W. Fernando·Dec 27, 2003SaveLearn
Non--Ginsburg-Landau Critical Current Behavior in MgCNi3We present transport critical current measurements on microfibers consisting of a 80-nm thick layer of polycrystalline MgCNi3 synthesized directly onto 7-micron diameter carbon fibers. Near the…D. P. Young, M. Moldovan, P. W. Adams·Dec 26, 2003SaveLearn
Statistics of Spectra for One-dimensional Quasi-Periodic Systems at the Metal-Insulator TransitionWe study spectral statistics of one-dimensional quasi-periodic systems at the metal-insulator transition. Several types of spectral statistics are observed at the critical points, lines, and region.…Yoshihiro Takada, Kazusumi Ino, Masanori Yamanaka·Dec 26, 2003SaveLearn
Comment on "Metallization of Fluid Nitrogen and the Mott Transition in Highly Compressed Low-Z Fluids"A comment on ``Metallization of Fluid Nitrogen and the Mott Transition in Highly Compressed Low-Z Fluids'' by Chau et al, Phys. Rev. Lett. 90, 245501 (2003).Marina Bastea·Dec 24, 2003SaveLearn
The effect of trap anharmonicity on the critical temperature for Bose-Einstein condensationThe anharmonicity of a magnetic atomic trap at long distances from its center (forty times the radius of the first atomic orbit along the elongated axis, i.e. hundreds of microns) is shown to…Augusto Gonzalez·Dec 24, 2003SaveLearn
Collective oscillations of a trapped Fermi gas near a Feshbach resonanceThe frequencies of the collective oscillations of a harmonically trapped Fermi gas interacting with large scattering lengths are calculated at zero temperature using hydrodynamic theory. Different…Sandro Stringari·Dec 23, 2003SaveLearn
Island Nucleation in Silicon on Si(111) Growth under Chemical Vapor DepositionRecent experiments show that the islanding behavior during chemical vapor deposition (CVD) of Si on Si(111) using disilane (Si2H6) is quite different from that due to molecular beam epitaxy…K. E. Khor, Sankar Das Sarma·Dec 23, 2003SaveLearn
Notes on RVB-Vanilla by Anderson et alThe claims made for the Resonating Valence Bond ideas for the cuprates in a recent paper by Anderson et al. on the basis of a variational calculation are discussed.C. M. Varma·Dec 22, 2003SaveLearn
Free Evolution of Superposition States in a Single Cooper Pair BoxWe have fabricated a single Cooper-pair box (SCB) in close proximity to a single electron transistor (SET) operated in the radio-frequency mode (RF-SET) with an inductor and capacitor lithographed…A. Guillaume, J. F. Schneiderman, P. Delsing et al.·Dec 19, 2003SaveLearn