Stochastic Modeling of Earthquake Scenarios in Greater Tehran

Tehran, the capital of Iran, with millions of inhabitants, has been affected several times by historical and recent earthquakes that confirm the importance of seismic hazard assessment for the area. The main objective of this article is to present a probabilistic procedure to construct time series compatible with the source-path and site reflecting the influence of different magnitude events at different distances that may occur during a specified time period. A Monte Carlo approach is used to generate numerous synthetic catalogs for the evaluation of the probabilistic seismic hazard in greater Tehran over hard rock site for a return period of 475 years. The disaggregation of the seismic hazard is carried out to identify hazard-dominating events and to associate them with one or more specific faults, rather than a given distance. The stochastic finite-fault technique based on region specific seismic parameters is used to generate time series of earthquake scenario.     

Effects of Base and Lift Joints on the Dynamic Response of Concrete Gravity Dams to Pulse-Like Excitations

Near-fault earthquakes with forward-directivity effects produce pulse-like excitations. This article studies the dynamic response of monolithic and cracked sections of gravity dam under symmetric and anti-symmetric pulse-like excitations. The pulses are generated by the modified Gabor Wavelet transform. Two main characteristics of the pulses are pulse period and amplitude. The prescribed cracks are located along the base and two distinct lift joints through the dam body. The dam is modeled along with its reservoir using finite element method. The effects of base and lift joints, pulses shape, period, and amplitude, and reservoir height on the dam dynamic response are studied.     

The Confessions of Dolgoruki: Fiction and Masternarrative in Twentieth-Century Iran

This paper is an in-depth study of The Confessions of Dolgoruki, the purported memoirs of a nineteenth-century Russian ambassador to Iran, long adduced as a document proving the claim that the Bahā'īs of Iran are spies of foreign powers. It unearths several early versions of the text, contextualizes the creation of The Confessions, exams the zeitgeist that produced it, and tracks the changes the text went through as the dominant socio-political discourse changed over time. In discussing the range of reactions The Confessions provoked, this paper traces the intriguing path through which this text created the masternarrative of Bahā'ī espionage. Finally, a hypothesis regarding the identity of the original creator of the text is advanced.