Comparison of the Spectral Representation Method to Simulate Spatially Variable Ground Motions

The spectral representation method (SRM) is widely used when simulating spatially variable ground motions. It has mainly two formulas, i.e., the random amplitudes and the random phases formulas. There exist three methods for decomposing the cross spectral density matrix: Cholesky decomposition, eigen decomposition, and root decomposition. Therefore, there are six forms with respect to the different combinations of the simulation formulas and the decomposition methods. To provide researchers and engineers with the guidance on choosing simulation method, the six forms are systematically investigated from five aspects: the power intensity, response spectra, and stochastic error of auto/cross spectral density, Fourier spectra, and difference indexes for Fourier amplitudes and phases. Finally, we give the following advice: the characteristics of the ground motions simulated by the random amplitudes formula are independent of the decomposition method, while the characteristics of the ground motions simulated by random phases formula are dependent of the decomposition method. Furthermore, the root decomposition is strongly recommended when utilizing the random phases formula.     

WAPA TOWN AT THE MOUNTAIN AREA

<正>I guess that,even in Tibet,apart from the residents themselves,few people have ever heard of Wapa Town.My colleagues had no knowledge of Wapa Town.I never he...     

The making of politics and trained intelligence in the Near East: Robert College of Istanbul

Abstract

This article examines the role of Robert College in Turkish-American relations in the early decades of the Turkish Republic. Relying on recently discovered archival sources and biographical accounts it explores political and educational networks between the United States and Turkey. Robert College, founded in 1863, was the first American College established abroad. It was, however, more than an educational institution; the College teaching staff acted as diplomatic and cultural correspondents for both countries. The trust the College staff earned among the Turkish elite during the First World War continued in the early years of Republic. This relationship turned into a more lucrative collaboration during the early periods of the Cold War. The story of Robert College in Turkey demonstrates the impact of trained intelligence on political relations between the two countries.     

The Political Discourses of three Contemporary Muslim Scholars: Secular,Nonsecular, or Pseudosecular?

It is well‐known that the quest for an Islamic state was a desire common to most Islamists of the twentieth and twenty‐first centuries. This article discusses three contemporary political theories that stand in sharp contrast to the Islamists’ theory of an Islamic state. These political theories are developed by three prominent contemporary Muslim scholars, Nasr Hamid Abū Zayd, Ablodkarim Soroush, and Muhammad Mujtahed Shabestari. The article attempts to discuss the common themes between the views of these scholars concerning governance. It argues that the political theories presented by them significantly differ from those developed by most Islamists, who share the idea that Islam is a self‐sufficient political system. It also argues that while these political theories challenge the idea that incorporates the maximal role for government in religious matters and thus are close to certain aspects of regulations of governance in Western countries, they are different from those political theories in the West that focus on a sharp distinction between religion and state because religion, for such scholar, plays an important role in developing civil society.     

Iran’s Socio-economic Drought: Challenges of a Water-Bankrupt Nation

Iran is currently experiencing serious water problems. Frequent droughts coupled with over-abstraction of surface and groundwater through a large network of hydraulic infrastructure and deep wells have escalated the nation’s water situation to a critical level. This is evidenced by drying lakes, rivers and wetlands, declining groundwater levels, land subsidence, water quality degradation, soil erosion, desertification and more frequent dust storms. This paper overviews the major drivers of Iran’s water problems. It is argued that while climatic changes and economic sanctions are commonly blamed as the main drivers of water problems, Iran is mainly suffering from a socio-economic drought—i.e. “water bankruptcy,” where water demand exceeds the natural water supply. In theory, this problem can be resolved by re-establishing the balance between water supply and demand through developing additional sources of water supply and implementing aggressive water demand reduction plans. Nevertheless, the current structure of the water governance system in Iran and the absence of a comprehensive understanding of the root causes of the problem leave minimal hope of developing sustainable solutions to Iran’s unprecedented water problems.     

Rethinking Development Space in Emerging Countries: Turkey's Conservative Countermovement

Despite an increasingly flexible global policy context, most emerging countries refuse to venture beyond their pre‐existing development strategies. This article contends that in some cases domestic political constraints under liberalized markets might preclude policy dynamism. In particular, it draws attention to the tension between market expansion and social cohesion as a formative influence over policy patterns. This tension is sometimes addressed through a conservative countermovement whereby liberally‐oriented governments entice sections of the poor into broad electoral coalitions by employing palliative interventions alongside market‐expanding policies. Turkey's ruling Justice and Development Party (AKP) is one example. Central to the Turkish case has been the redeployment of the country's historic foreign capital‐dependent pattern of growth in the service of selective redistribution and credit‐fuelled consumerism. The ensuing deficit‐led neoliberal populism assured stable and equitable growth in the extraordinary international and domestic context of the mid‐2000s, but has proven unfeasible since the global crisis. However, this coupling of market and social preferences has become politically so firmly entrenched in time that it now constrains the policy options to address Turkey's developmental impasse.     

Miocene scleractinian corals from a mixed siliciclastic–carbonate system: Bakhtiari succession,Zagros Basin (central-western Iran)

Colonial scleractinian corals were sampled from three levels within a Miocene marine unit of the Bakhtiari succession, Zagros Basin, central-western Iran. The first two coral-bearing intervals, A and B, contain small-scale scattered colonies and show a poor coral diversity, whereas the third, consisting of a strongly lithified limestone package, reflects a well-developed biostromal framework with higher coral skeletal volume within the Bakhtiari succession. The Bakhtiari succession coral assemblages are characterized by Porites sp. cf. P. maigensis, Porites sp. cf. P. mancietensis, Porites sp. cf. P. collegniana, Tarbellastraea reussiana, Favia sp., Montastrea sp. cf. P. tchihatcheffi, Favites sp. cf. P. neugeboreni, Favites sp. cf. P. neuvillei, Agathiphyllia sp. and Acropora sp. Sedimentological and palaeontological data indicate that the depositional environment is consistent with a mixed carbonate–siliciclastic ramp that was gently deepening basinwards from the shoreline. The hemispherical and massive growth forms of colonies and sparse branching forms dominated the well-illuminated euphotic zone. Abundant domestone and dense pillarstone coral growth fabrics interdigitating with coarse-grained terrigenous sediments developed in the shallow inner ramp environment. Branching forms and meandroid branching colonies together with some massive forms mostly inhabited the low-energy conditions of the lower euphotic to oligophotic zones of the middle ramp. In the middle parts of the mixed carbonate–siliciclastic ramp, sparse pillarstone together with domestone comprises a mixstone coral growth fabric. Fluctuations in nutrient and clastic sediment input, salinity and the growth of red algae likely terminated coral growth.