#### Filter Results:

- Full text PDF available (43)

#### Publication Year

1995

2017

- This year (1)
- Last 5 years (9)
- Last 10 years (26)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

We study the correlation functions of logarithmic conformal field theories. First, assuming conformal invariance, we explicitly calculate twoâ€“ and threeâ€“ point functions. This calculation is done for the general case of more than one logarithmic field in a block, and more than one set of logarithmic fields. Then we show that one can regard the logarithmicâ€¦ (More)

- M. Sadegh Movahed, Fatemeh Ghasemi, Sohrab Rahvar, Mohammad Reza Rahimi Tabar
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2011

We investigate the statistical anisotropy and gaussianity of temperature fluctuations of Cosmic Microwave Background (CMB) radiation data from the Wilkinson Microwave Anisotropy Probe survey, using the Multifractal Detrended Fluctuation Analysis, Rescaled Range, and Scaled Windowed Variance methods. Multifractal Detrended Fluctuation Analysis shows that CMBâ€¦ (More)

- Alireza Mashaghi, Pouya Partovi-Azar, +6 authors Mischa Bonn
- The journal of physical chemistry. B
- 2012

We report the complete assignment of the vibrational spectrum of dipalmitoylphosphatidylcholine (DPPC), which belongs to the most ubiquitous membrane phospholipid family, phosphatidylcholine. We find that water hydrating the lipid headgroups enables efficient energy transfer across membrane leaflets on sub-picosecond time scales. The emergence of spatiallyâ€¦ (More)

- Gholamreza Jafari, Seyed Mahdi Fazeli, +4 authors Ghassem Kavei
- Physical review letters
- 2003

We investigate the Markov property of rough surfaces. Using stochastic analysis, we characterize the complexity of the surface roughness by means of a Fokker-Planck or Langevin equation. The obtained Langevin equation enables us to regenerate surfaces with similar statistical properties compared with the observed morphology by atomic force microscopy.

- Fatemeh Ghasemi, Muhammad Sahimi, Joachim Peinke, Rudolf Friedrich, Gholamreza Jafari, Mohammad Reza Rahimi Tabar
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2007

We describe a general method for analyzing a nonstationary stochastic process X(t) which, unlike many of the previous analysis methods, does not require X(t) to have any scaling feature. The method is used to study the fluctuations in the daily price of oil. It is shown that the returns time series, y(t)=ln[X(t+1)X(t)] , is a stationary and Markov process,â€¦ (More)

- Fatemeh Atyabi, M A Livari, Kambiz Kaviani, Mohammad Reza Rahimi Tabar
- Journal of biological physics
- 2006

In this paper we introduce two methods for measuring irregularities in human heartbeat time series (HHTS). First we consider the multi-fractal structure of HHTS to distinguish healthy individuals and from those with congestive heart failure. In this way we modify the Extended Self-Similarity (ESS) method and apply it to HHTS. Our second approach is based onâ€¦ (More)

When Alfâ€˜ven effect is peresent in magnetohydrodynamics one is naturally lead to consider conformal field theories, which have logarithmic terms in their correlation functions. We discuss the implications of such logarithmic terms and find a unique conformal field theory with centeral charge c = âˆ’ 7 , within the border of the minimal series, which satisfiesâ€¦ (More)

- Mohammad Reza Rahimi Tabar, Muhammad Sahimi, +11 authors Reza Rahimi Tabar
- 2006

1 Department of Physics, Sharif University of Technology, P.O. Box 11365-9161, Tehran, Iran f ghasemi@mehr.sharif.edu,vesaghi@sharif.edu, mdniry@mehr.sharif.edu,S Fayazbakhsh@mehr.sharif.edu 2 CNRS UMR 6202,Observatoire de la CÃ´te dâ€™Azur, BP 4229, 06304 Nice Cedex 4, France rahimitabar@sharif.edu 3 Department of Chemical Engineering and Material Science,â€¦ (More)

- Fatemeh Ghasemi, Muhammad Sahimi, Joachim Peinke, Mohammad Reza Rahimi Tabar
- Journal of biological physics
- 2006

We describe a method for analyzing the stochasticity in non-stationary data for the beat-to-beat fluctuations in the heart rates of healthy subjects, as well as those with congestive heart failure. The method analyzes the return time series of the data as a Markov process, and computes the Markov time scale, i.e., the time scale over which the data are aâ€¦ (More)

- Nima Abedpour, Reza Asgari, Mohammad Reza Rahimi Tabar
- Physical review letters
- 2010

The amount of rippling in graphene sheets is related to the interactions with the substrate or with the suspending structure. Here, we report on an irreversibility in the response to forces that act on suspended graphene sheets. This may explain why one always observes a ripple structure on suspended graphene. We show that a compression-relaxation mechanismâ€¦ (More)