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Enhancing the Image Transmission over Wireless Networks through a Novel Interleaver
( M. A. M. El-bendary ),( A. E. Abou-el-azm ),( N. A. El-fishawy ),( F. Shawki ),( M. El-tokhy ),( F. E. Abd El-samie ),( H. B. Kazemian ) 한국인터넷정보학회 2011 KSII Transactions on Internet and Information Syst Vol.5 No.9
With increasing the using of wireless technologies in essential fields such as the medical application, this paper proposes different scenarios for the transmission of images over wireless networks. The paper uses the IEEE ZigBee 802.15.4 for applying the proposed schemes. It is a Wireless Personal Area Network (WPAN). This paper presents a novel chaotic interleaving scheme against error bursts. Also, the paper studies the proposed interleaver with the convolutional code with different constraint lengths (K). A comparison study between the standard scheme and proposed schemes for image transmission over a correlated fading channel is presented. The simulation results show the superiority of the proposed chaotic interleaving scheme over the traditional schemes. Also, the chaotic interleaver packet-by-packet basis gives a high quality image with (K=3) and reduces the need for the complex encoder with K=7.
Synthesis of Certain 6-(Arylthio)uracils and Related Derivatives as Potential Antiviral Agents
El-Emam, Ali A.,Massoud, Mohamed A.M.,El-Bendary, Eman R.,El-Sayed, Magda A. Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.7
New series of 6-(arylthio)uracils, 6-(4-substituted-1-piperazinyl)uracils, 2,4,5-trioxo-1H,3H-benzothiopyrano[2,3-d]pyrimidine and 5-aryl-2,4-dioxo-1H,3H-pyrimido[5,4-f]benzo[1,4]thiazepines have been prepared and screened for their in vitro activity against herpes simplex-1 virus (HSV-1) and human immunodeficiency virus-1 (HIV-1). The in vitro cytotoxic activity was also evaluated. The results of biological testing revealed that compound 5b showed marginal activity against HSV-1, while compounds 5b and 5f exhibited marginal activity against HIV-1. The rest of the tested compounds were found devoid of antiviral activity against both HSV-1 and HIV-1.
Samiha M. Abo El-Ola,Magda A. El-Bendary,Nasser H. Mohamed,Rehab M. Kotb 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
Functionalization of the textile surface plays a remarkable role in the synthetic fiber industry. This research isinterested in the one-step simultaneous functional finishing and transfer printing of alkaline-activated polyester fabric usingC.I. Disperse Red 60 and C.I. Disperse Blue 56. The optimum color depth was achieved using zinc oxide nanoparticle 0.5 %and nano polyurethane (50 g/l) in the finishing bath formulation, additionally, excellent ultraviolet protection (50+) category. Zinc oxide nanoparticles and zinc oxide/polyurethane nanocomposite finishing showed high antimicrobial efficiency. Theyshowed a microbial reduction of C. albicans (97 %), E. coli (93 and 96 %), and S. aureus (88 and 93 %), respectively. Thefinished polyester fabrics showed significant durability of protective properties for washing cycles after 25 washes. Theultraviolet protection maintained excellent category and enhanced ultraviolet protection factor values. The antimicrobialactivities after 25 washes achieved sustained microbial reduction percentage against the three tested microorganisms (C. albicans 92 and 87 %; E. coli 90 and 92 %; and S. aureus 87 and 81 %). The results showed the positive impact of zinc oxidenanoparticles and zinc oxide/polyurethane nanocomposite finishing on fastness to sublimation and light. At the same time,there is no change in the fastness of washing and perspiration. The effect of finishing formulations on the finished polyesterfabric samples' crucial mechanical properties was studied. These properties were fabric weight, thickness, tensile strength andelongation, and abrasion resistance. The obtained results showed that finishing polyester fabric samples with nanopolyurethane, zinc oxide nanoparticles, or zinc oxide/polyurethane nanocomposite did not alter the essential mechanicalproperties required for polyester fabric applications in textiles and apparel for different end uses. Additionally, the polyesterfabric surface was characterized using scanning electron microscopy and Fourier transform infrared spectroscopy, improvingthe functional finishing.