147,671 research outputs found
A value for bi-cooperative games
No full textBi-cooperative games were introduced by Bilbao et al. as a generalization of TU cooperative games, in which each player can participate positively, negatively, or not at all. In this paper, we propose a definition of a share of the worth obtained by some players after they decided on their participation in the game. It turns out that the cost allocation rule does not look for a given player to her contribution at the opposite participation option to the one she chooses. The relevance of the value is discussed on several examples.Bi-cooperative games ;Value ;Efficiency
Synthesis and Characterization of (1-x)(Na(0.5)Bi(0.5))TiO(3)-xAl(6)Bi(2)O(12) Solid Solution
No full textThe new lead-free (1-x)(Na(0.5)Bi(0.5))TiO(3)-xAl(6)Bi(2)O(12) compounds with x=0.01, 0.02, and 0.03 have been synthesized by conventional solid-state ceramic-fabrication technique. Systematic investigations on the dielectric, ferroelectric and piezoelectric properties of both poled and unpoled samples have been carried out. It was revealed that the dielectric and piezoelectric properties are improved by the addition of an appropriate amount of Al(6)Bi(2)O(12). Comparisons of these properties between poled and unpoled samples are presented. It is found that Curie temperatures and remnant polarization are increased after poling. The coercive field is, however, decreased after poling
The development of high field magnets utilizing Bi-2212 wind & react insert coils
No full textWind & react Bi-2212 inserts have been manufactured and tested inside a wide-bore NbTi-Nb3Sn magnet providing a background field up to 20T at 4.2K. A pair of six-layer concentric coils both achieved critical currents of 350 A (JE = 200 A/mm2) in a 20T background field. A thicker 14-layer insert made from 119m of round wire had a critical quench current IQ of 287A (JE = 162 A/mm2) at the same field and contributed to a combined central field of 22.5 T. This is a record for a fully superconducting magnet at 4.2 K. The 14-layer coil, equipped with an external protective shunt, was used for an extensive series of quench measurements and endured >150 quenches without damage. Minimum quench energies were found to be in the range of 200-500mJ in background fields of 15-20T when the coil carried 70-95% of its critical quench current
Photochemical ligand ejection from non-sterically promoted Ru(ii)bis(diimine) 4,4′-bi-1,2,3-triazolyl complexes
No full textComplexes of the form [Ru(diimine)2(btz)]2+ (btz = 1,1′-dibenzyl-4,4′-bi-1,2,3-triazolyl) are observed to undergo photochemical ejection of the btz ligand in the absence of any promotion through steric congestion to generate cis-bis(solvent) complexes [Ru(diimine)2(solvent)2]2+.
Graphical abstract: Photochemical ligand ejection from non-sterically promoted Ru(ii)bis(diimine) 4,4′-bi-1,2,3-triazolyl complexe
VEGF 936C > T Polymorphism and Association of BI-RADS Score in Women with Suspected Breast Cancer
No full textPurpose: Vascular endothelial growth factor (VEGF) is a potent regulator of angiogenesis and thereby involved in the development and progression of solid tumors. A 936C> T polymorphism in the VEGF gene has been associated with reduced VEGF plasma levels. Purpose of the present study was to analyze the potential association between VEGF genotype and radiological appearance of breast lesions by mammography. Materials and Methods: Fifty two women with 54 suspected breast lesions were analyzed by the use of mammography with the standard breast imaging reporting and data systems (BI-RADS). Germline VEGF genotype was determined in all subjects by allele-specific digestion of amplification products. An open biopsy was performed on all lesions. Results: VEGF CC, CT and TT genotypes were found in 41 (79%), 9 (17%) and 2 (4%) patients. By mammography 26, 16 and 12 suspected breast lesions were classified as BI-RADS scores 3, 4 and 5, respectively. Both carriers of the TT genotype were classified as BI-RADS 5, whereas among CT or CC carriers, BI-RADS scores 3, 4 and 5 were found in 26, 16 and 10 subjects (P T polymorphism seems to be associated with a high BI-RADS score in women with suspicious breast lesions
Phonon-induced anomalous Raman spectra in undoped high-T-c cuprates
No full textIn order to describe a shoulder peak structure near 4J in the magnon Raman spectra of undoped high-T-c cuprates, we have explored the phonon contribution to the Raman spectra. Incorporating the magnon-phonon Hamiltonian in the spin-wave theory, we have evaluated the two-magnon Raman spectral function originating from the lowest-order magnon-phonon-magnon scattering. It is found that phonons induce a shoulder peak near 4J besides the dominant two-magnon peak near 3J, in agreement with experiments.X111sciescopu
Phonon-induced magnon Raman scattering in high T-c cuprates
No full textThe anomalous line shapes of the Raman spectra of undoped high T-c cuprates are analyzed. In order to describe peak structures near 3J and 4J in the two-magnon B-1g Raman spectra, the phonon contribution to the Raman spectra are explored based on the spin wave theory in a two-dimensional Heisenberg antiferromagnet. We have derived the magnon-phonon Hamiltonian from the modulated exchange interaction by the lattice vibrations, and evaluated the Raman spectral function due to the lowest order magnon-phonon-magnon scattering. It is found that the magnon-phonon-magnon scattering gives rise to a phonon-induced magnon peak near 4J, in good agreement with experiments. Copyright (C) 1996 Elsevier Science LtdX112sciescopu
A characterization of Bi-Lipschitz embeddable metric spaces in terms of local Bi-Lipschitz embeddability
No full textWe characterize uniformly perfect, complete, doubling metric spaces which embed bi-Lipschitzly into Euclidean space. Our result applies in particular to spaces of Grushin type equipped with Carnot-Carath ́eodory distance. Hence we obtain the first example of a sub-Riemannian manifold admitting such a bi-Lipschitz embedding. Our techniques involve a passage from local to global information, building on work of Christ and McShane. A new feature of our proof is the verification of the co-Lipschitz condition. This verification splits into a large scale case and a local case. These cases are distinguished by a relative distance map which is associated to a Whitey-type decomposition of an open subset Ω of the space. We prove that if the Whitney cubes embed uniformly bi-Lipschitzly into a fixed Euclidean space, and if the complement of Ω also embeds, then so does the full space.Item withdrawn by Alexis Thompson ([email protected]) on 2011-04-18T17:51:05Z
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University of Illinois Theses & Dissertations (ID: 1)
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Concurrent bi-lateral negotiation in agent systems
No full textBi-lateral negotiations represent an important class of encounter in agent-based systems. To this end, this paper develops and evaluates a heuristic model that enables an agent to participate in multiple, concurrent bi-lateral encounters in competitive situations in which there is information uncertainty and deadlines
Photoemission spectra, hybridization, and Coulomb correlation in RT2 (R=Y,Ce,Pr,Nd,Sm,Gd; T=Fe,Co,Ni)
No full textThe effects of the R 4f/T 3d hybridization and the Coulomb correlation in the R4f and T 3d photoemission spectra of RT2 compounds (R = Y, Ce, Pr, Nd, Sm, Gd; T = Fe, Co, Ni) have been investigated. The calculated R 4f/T 3d hybridization parameters decrease with an increasing atomic number from R = Ce to Gd for the same T, and from RCo2 to RNi2 for the same R. These trends are consistent with those in the photoemission spectra. The calculated quasi-particle spectral densities indicate the importance of the on-site Coulomb correlation of the T 3d electrons in the electronic structures of RT2.X119sciescopu
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