information technology has demolished time and distance. the new communication technologies have become dominant in contemporary world politics. the tools such as mobile phones, internet and satellite networks play supporting role in social changes with strengthening public space. we witness the effectiveness of new media in the recent unprecedented developments in arabic countries. the social ...

Optical wireless communication has undeniably revolutionized the satellite communication systems for use in the coming future. These OWC systems have become popular due to their high data rate performance in different weather conditions. This paper demonstrates a comparative analysis of RZ (Return to zero), NRZ (Non-return to zero) and Gaussian pulse generation methods by varying the levels of ...

Non-coding repetitive DNAs have been proposed to perform a gene regulatory role, however for tandemly repeated satellite DNA no such role was defined until now. Here we provide the first evidence for a role of satellite DNA in the modulation of gene expression under specific environmental conditions. The major satellite DNA TCAST1 in the beetle Tribolium castaneum is preferentially located with...

This paper presents the algorithms that CERTH team deployed in order to tackle disaster recognition tasks and more specifically Disaster Image Retrieval from Social Media (DIRSM) and FloodDetection in Satellite images (FDSI). Visual and textual analysis, as well as late fusion of their similarity scores, were deployed in social media images, while color analysis in the RGB and nearinfrared chan...

Quasi-molecular satellite features of Ly β were first observed in a HUT spectrum of the DA white dwarf Wolf 1346 and interpreted by Koester et al. (1996). In this paper we study the dependence of these features on temperature and surface gravity in 4 additional DA observed with ORFEUS-SPAS II in 1996. For the interpretation we use theoretical atmosphere models which incorporate new profiles for...

This paper analyzes several mitigation strategies and techniques that could enable delay sensitive applications to work properly over satellite IP networks. A study is conducted on different satellite classes (GEO, MEO and LEO) and the analysis of the current solutions for real-time interactive applications is performed. The great distance from Earth results in an important RTT, which is the ma...

Free space optical communication provides a very important method for the satellites orbiting around the earth to communicate with each other. Inter-satellite optical wireless communication systems (IsOWC) are one of the important applications of FSO/WSO technology that will be expand in space in the near future. These systems provide a high bandwidth, small size, light weight, low power and lo...

Corresponding Author: Syaifulnizam Abd Manaf Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, Serdang, Malaysia Email: [email protected] Abstract: Shoreline is a very important element to identify exact boundary at the coastal areas of a country. However, in order to identify land-water boundary for a large region using traditional ground survey technique ...