Probing the X-ray Variability of X-ray Binaries

Kilohertz quasi-periodic oscillations (kHz QPOs) has been regarded as representing the Keplerian frequency at the inner disk edge in the neutron star X-ray binaries. The so-called ``parallel tracks'' on the plot of the kHz QPO frequency vs. X-ray flux in neutron star X-ray binaries, on the other hand, show the correlation between the kHz QPO frequency and the X-ray flux on time scales from hours to days. This is suspected as caused by the variations of the mass accretion rate through the accretion disk surrounding the neutron star. We show here that by comparing the correlation between the kHz QPO frequency and the X-ray count rate on a certain QPO time scale observed approximately simultaneous in the Fourier power spectra of the X-ray light curve, we have found evidences that the X-ray flux of millihertz QPOs in neutron star X-ray binaries is generated inside the inner disk edge if adopting that the kilohertz QPO frequency is an orbital frequency at the inner disk edge. This approach could be applied to other variability components in X-ray binaries.Comment: 4 pages including 1 figure, To appear in "High Energy Processes and Phenomena in Astrophysics, IAU Symposium 214", X. Li, Z. Wang, V. Trimble (eds

Jing Wang. High culture fever : politics, aesthetics, and ideology in Deng\u27s China; Jing Wang, ed. China\u27s avant-garde fiction : an anthology

This article reviews the books High Culture Fever: Politics, Aesthetics, and Ideology in Deng\u27s China written by Jing Wang and China\u27s Avant-Garde Fiction: An Anthology edited by Jing Wang

Replies to Wang, Speaks, and Pautz

Replies for a symposium on Propositions

Described robot functionality impacts emotion experience attributions

This work tested whether attributions of emotional experience vary with the perceived functionality of robots. When robots were described in terms of their social value, participants assigned greater levels of emotional experience compared to when robots merely seemed to fulfil economic needs. However, increased perceptions of experience elicited more uncomfortable feelings in observers, apparently tapping into the uncanny valley. Implications for the use of social robots and human responses to feeling machines are discussed