91,935 research outputs found
Lie-Poisson groups and the Miura transformation
We point out that the recent proof of the Kupershmidt-Wilson theorem by Cheng
and Mas-Ramos is underpinned by the Lie-Poisson property of the second
Gel'fand-Dickey bracket. The supersymmetric Kupershmidt-Wilson theorem is also
proved along these same lines. Finally we comment on the possible repercussions
in the problem of the coproduct for W-algebras.Comment: .dvi file, uses AMSFonts 2.1+, 10 pages (5 physical pages in
landscape mode), no figure
Value and selfhood: pragmatism, Confucianism, and phenomenology
This article articulates a dialogue between Edward Casey, Cheng Chung‐ying, and me that began at the Eastern Division annual meeting in Philadelphia of the American Philosophical Association, in a session sponsored by the International Society for Chinese Philosophy. There, we read brief versions of the papers presented in this issue and commented on one another. Casey represented Continental phenomenology, Cheng the Chinese tradition as he has developed it into onto‐generative hermeneutics, and I the melding of American pragmatic and Confucian traditions that I have been developing
Beaming effects in GRBs and orphan afterglows
The overall dynamical evolution and radiation mechanism of -ray burst
jets are briefly introduced. Various interesting topics concerning beaming in
-ray bursts are discussed, including jet structures, orphan afterglows
and cylindrical jets. The possible connection between -ray bursts and
neutron star kicks is also addressed.Comment: 10 Pages, 4 figures, to appear in a special issue of ApSS. Oral
report presented at "The Multiwavelength Approach to Unidentified Gamma-Ray
Sources" (Hong Kong, June 1 - 4, 2004; Conference organizers: K.S. Cheng and
G.E. Romero
Hasegawa Teru alias Verda Majo (1912-1947). A Japanese woman Esperantist in the Chinese Anti-Japanese War of Resistance
Englische Übersetzung von: Gotelind Müller-Saini: Hasegawa Teru alias Verda Majo (1912-1947). Eine japanische Esperantistin im chinesischen anti-japanischen Widerstand.
In: Gimpel, Denise und Hanz, Melanie (Hrsgg): Cheng. Festschrift in Honour of Monika Übelhör, Hamburg 2001, S. 259-274
Magnetars and pulsars: a missing link
There is growing evidence that soft gamma-ray repeaters (SGRs) and anomalous
X-ray pulsars (AXPs) are isolated neutron stars with superstrong magnetic
fields, i.e., magnetars, marking them a distinguished species from the
conventional species of spindown-powered isolated neutron stars, i.e., radio
pulsars. The current arguments in favor of the magnetar interpretation of
SGR/AXP phenomenology will be outlined, and the two energy sources in
magnetars, i.e. a magnetic dissipation energy and a spindown energy, will be
reviewed. I will then discuss a missing link between magnetars and pulsars,
i.e., lack of the observational evidence of the spindown-powered behaviors in
known magnetars. Some recent theoretical efforts in studying such behaviors
will be reviewed along with some predictions testable in the near future.Comment: Invited talk at the Sixth Pacific Rim Conference on Stellar
Astrophysics, a tribute to Helmut A. Abt, July 11-17, 2002, Xi'an. To appear
in the proceedings (eds. K. S. Cheng, K. C. Leung & T. P. Li
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