Scientific Research Publishing

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52872#.VKtGkMnQrzE Author(s)   Humberto Reyes , Blanca M. Vázquez , Carmen Jasso , Miguel Aguilar Affiliation(s) Coordinación de Geografía, Facultad de Ciencias Socialesy Humanidades, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México . ABSTRACT Deforestation and fragmentation of tropical forest are the most serious threats to biodiversity. In the lowlands of the Huasteca Potosina region, Mexico, more than 95,000 ha of tropical forest have disappeared. This paper analyses tree species composition in tropical forest patches of this highly deforested region, located in northeast of Mexico. At present, only 57 r...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50619#.VEclwlfHRK0 Author(s)   Rizik M. H. Al-Sayyed 1 , Fawaz A. Al Zaghoul 1 , Dima Suleiman 1 , Mariam Itriq 1 , Ismail Hababeh 2 Affiliation(s) 1 King Abdullah II School for Information Technology, The University of Jordan, Amman, Jordan . 2 Faculty of Computer Engineering and Information Technology, German Jordanian University, Amman, Jorda . ABSTRACT The efficiency and performance of Distributed Database Management Systems (DDBMS) is mainly measured by its proper design and by network communication cost between sites. Fragmentation and distribution of data are the major design issues of the DDBMS. In this paper, we propose...