Osama Farrag

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This paper introduces a novel optimization strategy for increasing the resource efficiency and security of data routing in a wireless sensor network. Most secure routing schemes found in the literature provision security at the highest level by involving sophisticated data encryption with a large key. This imposes lots of overhead both in computation, while(More)
Ad-hoc networks are becoming an effective tool for many mission critical applications such as troop coordination in a combat field, situational awareness, etc. These applications are characterized by the hostile environment that they serve in and by the multicast-style of communication traffic. Therefore, authenticating the source and ensuring the integrity(More)
Multicast streams are the most popular traffic pattern in many applications of mobile ad-hoc networks (MANET). However, the mobility of nodes causes frequent changes to the network topology and thus efficient routing of multicast traffic becomes very challenging. The establishment of a core-mesh has been deemed as a very effective solution for these dynamic(More)
  • O A Farrag
  • The Australian & New Zealand journal of…
  • 1987
Three tight regimens to maintain blood sugar values of 5.6 SI (group A), 5.6-6.7 SI (group B), and 6.7-8.9 SI (group C), were studied in 60 pregnant diabetic patients. The perinatal salvage rate was 96.6%. Maternal hypoglycaemia occurred only in group A. The group C regimen produced more complications than occurred in the other 2 groups. Very tight control(More)
Two-hundred-and-eighteen gynaecological patients were screened for group B-beta haemolytic streptococci (GBS) colonization of the vagina, cervix, urethra and rectum. The overall colonization rate was 17%. There is no relation between the rate of colonization and the patient's age or parity. The colonization rate among the intrauterine contraceptive device(More)
Labor was induced with two low-dose regimens of prostaglandin E2 (PGE2) tablets in 46 high-parity women at term who had singleton pregnancies with a success rate of 97.8%. Of the successfully induced patients, 42 had vaginal delivery and three were delivered by cesarean section for cephalopelvic disproportion. There was one failure of induction. Both dose(More)