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- Sung-Bin Chang, Chi-Jen Lin, +5 authors Tak-Wai Chan
- Educational Technology & Society
- 2009

or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear the full citation on the first page. Copyrights for components of this work owned by others than IFETS must be honoured. Abstracting with credit is permitted. To copy otherwise, to… (More)

- Emily S C Ching, Yue-Kin Tsang
- Physical review. E, Statistical, nonlinear, and…
- 2007

Human heart rate is known to display complex fluctuations. Evidence of multifractality in heart rate fluctuations in healthy state has been reported [Ivanov, Nature (London) 399, 461 (1999)]. This multifractal character could be manifested as the dependence of the probability density functions (PDFs) of the interbeat interval increments, which are the… (More)

- E S C Ching, P T Leung, W M Suen, K Young, Hong Kong
- 1995

It is well-known that the dominant late time behavior of waves propagating on a Schwarzschild spacetime is a power-law tail; tails for other spacetimes have also been studied. This paper presents a systematic treatment of the tail phenomenon for a broad class of models via a Green's function formalism and establishes the following. (i) The tail is governed… (More)

An exact expression is obtained for the probability density function (pdf) of any quantity measured in a general stationary process, in terms of conditional expectations of time derivatives of the signal. This expression indicates that the conditional expectations of both the time derivative squared and of the second time derivative influence the shape of… (More)

- Ya-Wei Chang, Emily Ching, Chih-Ti Chen, Tak-Wai Chan
- ICCE
- 2005

- Emily Ching, Chih-Ti Chen, Chih-Yueh Chou, Yi-Chan Deng, Tak-Wai Chan
- CSCL
- 2005

- E S C Ching, P T Leung, W M Suen, K Young, Hong Kong
- 1995

The late time behavior of waves propagating on a general curved spacetime is studied. The late time tail is not necessarily an inverse power of time. Our work extends, places in context, and provides understanding for the known results for the Schwarzschild spacetime. Analytic and numerical results are in excellent agreement.

- E S C Ching, P T Leung, W M Suen, K Young, Hong Kong
- 1994

The quasinormal modes (QNM's) of gravitational systems modeled by the Klein-Gordon equation with effective potentials are studied in analogy to the QNM's of optical cavities. Conditions are given for the QNM's to form a complete set, i.e., for the Green's function to be expressible as a sum over QNM's, answering a conjecture by Price and Husain [Phys. Rev.… (More)

- Emily S C Ching, Yoram Cohen, Thomas Gilbert, Itamar Procaccia
- Physical review. E, Statistical, nonlinear, and…
- 2003

We have recently proposed that the statistics of active fields (which affect the velocity field itself) in well-developed turbulence are also dominated by the statistically preserved structures of auxiliary passive fields which are advected by the same velocity field. The statistically preserved structures are eigenmodes of eigenvalue 1 of an appropriate… (More)

- Emily S C Ching, H C Tam
- Physical review. E
- 2017

We address the long-standing challenge of how to reconstruct links in directed networks from measurements, and present a general method that makes use of a noise-induced relation between network structure and both the time-lagged covariance of measurements taken at two different times and the covariance of measurements taken at the same time. When the… (More)