Abstract Bab el Nasr gate, which was built between 1087 and 1092, is one of the three remaining gates in Cairo Fatimid walls. Inside walls, there are a great variety stonework pieces that reveal stereotomic knowledge their executors. Specially, inner space gate covered by groin vault stands out for accuracy its construction, despite early execution date. In order to analyse geometry design phot...

Abstract This article seeks to demonstrate that a believed Seljuq hat from Iran is in fact Fatimid Egypt. For the first time, it uses an analysis of paper documents used line this once splendid samite piece and asks about archival logic their reuse. Beyond narrow question origin, illustrates methodological challenge for textile historians who often have operate without additional documentary ma...

The 40-yr ECMWF Re-Analysis (ERA-40) data are analyzed to demonstrate that wave forcing at lower latitudes plays a crucial role in driving the tropical upwelling portion of the Brewer–Dobson circulation. It is shown that subtropical wave forcing is correlated with tropical upwelling on both intraseasonal and interannual time scales when transient waves are taken into account, and that tropical ...

[1] The energy input to the upper ocean Ekman layer is assessed for the Southern Ocean by examining the rotary cross spectrum between wind stress and surface velocity for frequencies between 0 and 2 cpd. The wind stress is taken from European Center for Medium-Range Weather Forecasts ERA-40 reanalysis, and drifter measurements from 15 m depth are used to represent surface velocities, with an ad...

We are now in the post-PC era, yet our mobile devices are insecure. We consider the different stake-holders in today’s mobile device ecosystem, and analyze why widely-deployed hardware security primitives on mobile device platforms are inaccessible to application developers and end-users. We systematize existing proposals for leveraging such primitives, and show that they can indeed strengthen ...

To my family in China and my wife Yun ACKNOWLEDGEMENTS I wish to thank Prof. Robert Dickinson for advising my thesis and providing support for my PhD study for the past five years. This dissertation would be impossible without his continuous encouragement and support. I am grateful to the support and help from and discussions with Prof. Albany). I also like to thank my current and past group me...

A new nonparametric method to correct model data is proposed. At any given point in space and time the correction is determined from “analogs” in a learning dataset. The learning dataset contains model data and simultaneous observations. The method is applied to the significant wave height dataset of the 45-yr European Centre for Medium-Range Weather Forecasts Re-Analysis (ERA-40). Comparison o...