While funding agencies have provided substantial support for the developers and vendors of services that facilitate the unfettered flow of information through the Internet, little consolidated knowledge exists on the basic communications network infrastructure of the Islamic Republic of Iran. In the absence open access and public data, rumors and fear have reigned supreme. During provisional re...

Effective widespread deployment of cryptographic technologies such as secure email and IPsec has been hampered by the difficulties involved in establishing a large scale public key infrastructure, or PKI. Identity-based cryptography (IBC) can be used to ameliorate some of this problem. However, current approaches to using IBC for email or IPsec require a global, trusted key distribution center....

Aiming at the problem of the storage and transmission security of fingerprint templates in datacenter computer monitoring system (DCRMS), an authentic method based on digital fingerprint random encryption IBC is proposed in this paper, combined with the feature of fingerprint vector encryption algorithms. The method is mainly based on fusion user’s fingerprint characteristic and asymmetric auth...

Early geodynamic processes modeled the surface of the Earth, providing suitable environments and energy sources for the development of life. Studying the ancient biogeochemical cycles is thus a valuable way to understand the physicochemical conditions of the early environments, such as the redox state of the primitive oceans and the atmosphere. To investigate early biogeochemistries, the measur...

The classical Lorenz lowest order system of three nonlinear ordinary differential equations, capable of producing chaotic solutions, has been generalized by various authors in two main directions: (i) for number of equations larger than three (Curry1978) and (ii) for the case of complex variables and parameters. Problems of laser physics and geophysical fluid dynamics (baroclinic instability, g...

For more than three years, the GRACE pair of satellites have been orbiting the Earth, monitoring the time variable mass distribution for scales ranging from regional to global. The GRACE data have been released for a broad scientific community and sets of gravity fields are available. This paper shows that there are evidences at interrannual 5 time scales for the presence of ENSO signal in the ...

It has been suggested that post-orogenic lithospheric removal in continental back arcs promotes extension and surface subsidence. However, the surface response of this process and its primary difference from “classical” back-arc opening have remained uncertain. Here, the back-arc extension process with varying continental mantle lithosphere thickness and thermal heterogeneities is studied by us...

1. Dept. of Nephrology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran 2. Dept. of Clinical Pharmacy, School of Pharmacy-International Campus, FCRDC, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran 3. Dept. of Nephrology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran 4. Dept. of Radiology, Shahid Beheshti University of Medical...

Before, during and after many large earthquakes significant change in concentration of radon has been observed in China, Japan and India. To establish this behaviour as a potential earthquake precursor, it is important to understand the phenomenon in terms of geodynamics. Here I propose a geodynamic model to establish a correlation between precursory radon concentration fluctuations and an impe...