An Initial Survey of Arabic Poetry in the Cairo Genizah     

Mohamed A. H. Ahmed 《Al-Masaq: Islam & the Medieval Mediterranean》2018,30(2):212-233

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Effectiveness of antigraffiti treatments in connection with penetration depth determined by different techniques     

Paula María Carmona-Quiroga  Sagrario Martínez-Ramírez  Santiago Sánchez-Cortés  Mohamed Oujja  Marta Castillejo  María Teresa Blanco-Varela 《Journal of Cultural Heritage》2010,11(3):297-303

The elimination of spray paint using traditional (chemical and mechanical) methods inevitably entails altering surface characteristics. Hence, the impact and deterioration caused by graffiti in heritage buildings and monuments have led to the development and application of preventive systems in the form of antigraffiti coatings (which prevent paint from seeping into the pores of the surface material and facilitate cleaning). The effectiveness of two of these treatments, a commercial product (fluoroalkyl siloxane, protectosil, marketed by Degussa) and a hybrid organic-inorganic material (Ormosil), was evaluated in five construction materials (limestone, granite, cement mortar, lime mortar and brick), in terms of their penetration into the substrate. A number of techniques were used to determine the penetration depth (SEM/EDX, micro-Raman and LIBS), because a comparative analysis showed that none was universally valid for all types of treatments. The results show that the presence of the coating on the surface of less porous materials only ensures effective cleaning when the surface is fairly smooth. In granite, for instance, the CF₃ terminals in the fluorinated treatment hinder spray paint bonding more effectively than Ormosil, but not efficiently enough to ensure complete removal of the paint from granite surfaces.  相似文献   

Toward a Pan-cultural Typology of Deception Motives     

Timothy R. Levine  Mohamed Vaqas Ali  Marleah Dean  Rasha A. Abdulla  Karina Garcia-Ruano 《Journal of Intercultural Communication Research》2016,45(1):1-12

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Higher education strategy in digital transformation     

Mohamed Hashim  Mohamed Ashmel  Tlemsani  Issam  Matthews  Robin 《Education and Information Technologies》2022,27(3):3171-3195

Education and Information Technologies - Digital transformation in the global higher education industry determines the future roadmap to a sustainable education management strategy. This research...  相似文献