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RISS 인기검색어
- 검색키워드
- 저자 : Elmustafa Sayed Ali (검색결과 2 건)
- 무료
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Impact of Power Consumption in Sensors Life Time for Wireless Body Area Networks
Lana Ibrahim,Hana Osman,Abdala Osman,Elmustafa Sayed Ali 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.8
Wireless body area network (WBAN) is a communication standard optimized for low power devices and operation on, in or around the human body but not limited to humans used to serve a variety of applications including medical, consumer electronics, entertainment and other[1]. The challenge of WBAN is that the energy of the sensors is limited by the battery life that’s why the transmitting of data is not continuous for long time. This leads to poor efficiency of the WBAN because the continuous power decreasing is due to network operations. An algorithms such as MAC zigbee802.15.4 and adaptive reliable MAC are important to reduce the replacement of batteries many times and to save power consumption. In this paper we concentrated our study on some type of sensors, they are telosB, mica2, micaz, and imote2 depends on power consumption calculations using mat lab program and based on adaptive reliable MAC. We analyzed the sensors with several nodes and packet sizes, and calculate the lifetimes for all the sensors in WBAN. The results we obtained show a good performance of using Adaptive reliable MAC in Wireless Body Area Networks.
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Exploratory Investigation for Some Universities' E-Learning Systems during Covid-19 Pandemic
Fatima Rayan Awad, Ahmed,Thowiba E., Ahmed,Rashid A., Saeed,Elmustafa Sayed, Ali,Ghada Elnour Elterafi, Abdelrhman,Somia Yousif Ahmed, Abutiraima International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.12
COVID pandemic has reshaped the world as it has been known to us and the education system is one of the most affected by it. Due to social distancing, quarantines and isolations have made it impossible for the knowledge transition to the masses using conventional methods. For cope with pandemic, the only other way available for some of the fortunate countries is the use of E-learning having somewhat the same traditional teaching method. This paper is concerned with the study of the preparedness of the learning system in some Sudanese universities due to the impact of the COVID-19 pandemic. Critical analysis has been performed to evaluate the current developing scenario, usage of the facilities available in open-source platforms, and the interaction of the universities folks with e-learning systems. The impact of such measures has been thoroughly investigated in this paper for Sudan which is already deprived of a proper education system. The investigation shows that the interact of the staff and the students with the system was acceptable where more than 85% of those enrolled to the system were interact properly and efficiently. The lecturers conducted through the platform were attended with more than 75% of the students. We also found that most of the lecturer were avoid to exam students by utilize the platform; where only 45% of the uploaded courses were conducted exams over Moodle platform. As Moodle is an open source and still need to be improved to be used for high examination credibility.
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