E-Government services offer citizens an easy way to accomplish their work anytime and anywhere. Ensuring the accessibility and usability of such services is crucial to citizens to allow smooth online transaction. In this paper we present an empirical study to investigate the accessibility and usability of a representative sample of top Saudi e-government services. The accessibility will be based on the compliance to WCAG 2.0 recommendations, and the usability will be based on expert reviews.

We present a magnetic study of palaeohearths within Lazaret cave (Nice, France) that demonstrates how to recognize
fired structures in similar geological contexts. Using magnetic field and susceptibility mapping, excavated and
potentially still-buried palaeohearths of the cave are investigated. Our study reveals some difficulties in conducting
a magnetic field survey to detect combustion features in a cave due to noise and ambiguities in anomaly assignment.

The Atlas orogeny in northern Algeria and Tunisia led to the destruction of Tethys oceanic lithosphere and
cumulated in a collision ofmicroplates rifted off the European marginwith the North African continental margin.
The location of the boundary between African plate and Kabylian microplate is expressed in northern Algeria by a
crustal wedge with double vergence of thrust sheets, whereas in northern Tunisia the geologic environment is
more complex and the location of the plate boundary is ambiguous. In this study, we analyzed gravity data to