151,558 research outputs found
Cayley graphs generated by small degree polynomials over finite fields
We improve upper bounds of F. R. K. Chung and of M. Lu, D. Wan, L.-P. Wang,
X.-D. Zhang on the diameter of some Cayley graphs constructed from polynomials
over finite fields
A New Lower Bound for the Distinct Distance Constant
The reciprocal sum of Zhang sequence is not equal to the Distinct Distance
Constant. This note introduces a -sequence with larger reciprocal sum, and
provides a more precise estimation of the reciprocal sums of Mian-Chowla
sequence and Zhang sequence.Comment: 4 pages, 3 ancillary table
Zero energy correction method for non-Hermitian Harmonic oscillator with simultaneous transformation of co-ordinate and momentum: Wave function analysis under Iso-spectral condition
We present a complete analysis on energy and wave function of Harmonic
oscillator with simultaneous non-hermitian transformation of co-ordinate ( and momentum for getting energy
eigenvalue using perturbation theory under iso-spectral condition. Further we
notice that two different frequency of oscillation ()correspond
to same energy eigenvalue, which can also be verified using Lie algebraic
approach [Zhang et.al J.Math.Phys 56 ,072103 (2015)]. Interestingly wave
function analysis using similarity transformation [F.M. Fernandez, Int. J.
Theo. Phys. (2015)(in Press)] refers to a very special case.Comment: This paper for replacement .(i) Minor change in title reflecting wave
function analysis(ii) Abstract-chaed suitably to refect wave function (iii)
Text original work with information on wave function ,comparison and slight
modification in references.Kindly accep
New Models for X-Ray Synchrotron Radiation from the Remnant of Supernova 1006 AD
Galactic cosmic rays up to energies of around 10^15 eV are assumed to
originate in supernova remnants (SNRs). The shock wave of a young SNR like SN
1006 AD can accelerate electrons to energies greater than 1 TeV, where they can
produce synchrotron radiation in the X-ray band. A new model (SRESC) designed
to model synchrotron X-rays from Type Ia supernovae can constrain values for
the magnetic-field strength and electron scattering properties, with
implications for the acceleration of the unseen ions which dominate the
cosmic-ray energetics. New observations by ASCA, ROSAT, and RXTE have provided
enormously improved data, which now extend to higher X-ray energies. These data
allow much firmer constraints. We will describe model fits to these new data on
SN 1006 AD, emphasizing the physical constraints that can be placed on SNRs and
on the cosmic-ray acceleration process.Comment: 10 pages, 2 figures. to appear in "Cosmic Explosions", proceeding of
the 10th Annual October Astrophysics Conference (ed. S.S. Holt and W. W.
Zhang) LaTex aipproc.st
Zhang Peili
In 2014, New York-based artist Lois Conner gifted one of pioneering Chinese artist Zhang Peili’s last paintings to The Australian National University’s newly opened Australian Centre on China in the World. Never exhibited and thought lost, the reemergence of Flying Machine (1994) prompts an exploration of the relation between painting and video in the oeuvre of Zhang Peili. Given Zhang’s significance as a leading conceptual painter in the 1980s, then as a media art pioneer and educator in the 1990s and 2000s, Zhang Peili: From Painting to Video is also a nuanced study of broader developments in Chinese contemporary art’s history. Featuring contributions by historian Geremie R. Barmé, photographer Lois Conner, art historians John Clark, Katie Grube, and Olivier Krischer, and curator Kim Machan, these essays together challenge the narrative of Zhang as ‘the father of Chinese video art’, highlighting instead the conceptual consistency, rigour, and formal experimentation in his work, which transcends a specific medium. By equal measure, the book embraces longstanding connections as integral to its meaning, connections between artists, curators and researchers, collaborators, colleagues and friends through China and Australia
- …