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

The successful adoption of technologies in classrooms, we argue, relies on a greater emphasis on content-related pedagogical models for technology enhanced learning design. We propose the content-first design, an approach to creating content sample in the one-to-one classroom—classrooms with a wireless enabled computing device available for each student. To… (More)

- Roberto Benzi, Emily S C Ching, Nizan Horesh, Itamar Procaccia
- Physical review letters
- 2004

A simple model of the effect of polymer concentration on the amount of drag reduction in turbulence is presented, simulated, and analyzed. The qualitative phase diagram of drag coefficient versus Reynolds number (Re) is recaptured in this model, including the theoretically elusive onset of drag reduction and the maximum drag reduction (MDR) asymptote. The… (More)

- Emily S C Ching, H Guo, Xiao-Dong Shang, P Tong, Ke-Qing Xia
- Physical review letters
- 2004

We present a scheme to extract the velocity of buoyant structures in turbulent thermal convection from simultaneous local velocity and temperature measurements. Applying this scheme to measurements taken at positions within the convection cell where the buoyant structures are dominated by plumes, we obtain the temperature dependence of the plume velocity… (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)

- Emily S C Ching, Pik-Yin Lai, C Y Leung
- Physical review. E, Statistical, nonlinear, and…
- 2013

In the study of networked systems, a method that can extract information about how the individual nodes are connected with one another would be valuable. In this paper, we present a method that can yield such information of network connectivity using measurements of the dynamics of the nodes as the only input data. Our method is built upon a noise-induced… (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)

- Emily S C Ching, Pik-Yin Lai, C Y Leung
- Physical review. E, Statistical, nonlinear, and…
- 2015

We present a method that reconstructs both the links and their relative coupling strength of bidirectional weighted networks. Our method requires only measurements of node dynamics as input. Using several examples, we demonstrate that our method can give accurate results for weighted random and weighted scale-free networks with both linear and nonlinear… (More)

- Ya-Wei Chang, Emily Ching, Chih-Ti Chen, Tak-Wai Chan
- ICCE
- 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. PACS numbers: 04.30.-w Typeset… (More)