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Adaptive Control of Congestion in Tough Wireless Environments Using DCM+ algorithm

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International Journal of Communications, Network and System Sciences 2019年第8期12卷 113-123页

作者： Rushdi Hamamreh derar Khader Department of Electronics and Computer Engineering Al-Quds University Jerusalem Palestine

The aim of this paper is to present DCM+, a new congestion control protocol for data networks. It stands for Dynamic Congestion control for Mobile networks. New metrics have been newly invented and introduced like normalized advancing index (NAI) and complete transmission time (CTT). The simulations are done for a simple single-hop-topology (sender-router-receiver). The outcomes of this protocol are excellent and, in most cases, better than other approaches. The excellent properties of our proposed protocol were possible through tracking the available slow-start threshold. We achieved performance improvement, minimized end-to-end delay and large reduction in transmission time. DCM+ was able to combine many advantages at same time of the protocols NewReno and Westwood+. The results show, that DCM+ is extremely adequate for different types of networks. Feedback as main principle of control theory was used to control the congestion in the network. The parameters Round-Trip-Time (RTT) and Retransmission Timeout (RTO) are used as feedback signals to adjust the next congestion window (cwnd).

关键词： Congestion Control Westwood+ Slow-Start Congestion Avoidance Bandwidth Estimation Round-Trip Time Retransmission Timeout Feedback ns-3

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北海巴尔德油田地质特征

国外油气地质信息 2002年第1期 15-17页

作者： P.derar 安利君

Whole Exome Sequencing: Novel Genetic Polymorphisms in Saudi Arabian Attention Deficit Hyperactivity Disorder (ADHD) Children

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Natural Science 2019年第2期11卷 45-60页

作者： Neda Mostafa Bogari Amr Ahmed Amin Ashwag aljohani Ghida Dairi Mahmoud Zaki El-Readi Anas Dannoun Udaya Raja Mohammad Adil Nermeen Qutub Suhair alhelfawi Amal alobaidi derar alqudah Hussain Banni Safaa Yehia Eid Huda Balto Faisal al-allaf Mohiuddin Taher Hiba Saed al-Amoodi Ahmed Fawzy Department of Medical Genetics Faculty of Medicine Umm Al-Qura University Makkah KSA Biochemistry Department Faculty of Medicine Umm Al-Qura University Makkah KSA Faculty of Medicine Ain Shams University Cairo Egypt Umm al-Qura University Makkah KSA Biochemistry Department Faculty of Pharmacy Al-Azhar University Assuit Egypt Integrated Gulf Biosystems Jeddah KSA Special Needs Department School of Education Umm Al-Qura University Mecca KSA Sinad City for Special Needs Makkah KSA Institute of Education University of Reading Reading UK Faculty of Medicine King Abdulaziz University Jeddah KSA Science and Technology Unit Umm Al-Qura University Makkah KSA Division of Human Genetics & Genome Researches Department of Molecular Genetics and Enzymology National Research Centre Dokki Egypt

Background: Attention-deficit hyperactivity disorder (ADHD) is a widespread and debilitating disorder with relatively high prevalence in Saudi Arabia. Neuropsychological and radiological investigations have revealed that there are some differences in the components of the brain regions in children with and without ADHD. In this study we have performed whole exome sequencing (WES) in four non-familial cases of ADHD from Makkah Region to identify the genetic polymorphisms associated with the disease in our Saudi population. Methods: Exome sequencing was carried out using Ion Proton with AmpliSeq Exome library methods, and the data were analysed by Ion Reporter 5.6 software. Results: A total of 33 variants were identified from 222 genes selected from the GWAS catalogue for ADHD associated genes. However, the SNPs we identified in these genes were not reported to be associated with ADHD in previous studies. We have identified 2 novel missense variants;one in c.3451G > T;p. (ala1151Ser) in ITGA1 gene and another is c.988G > A;p. (ala330Thr) in SPATA13 genes. The variants rs928661, rs11150370 and rs386792899 were the only three variants that appeared on all the 4 patients studied. Six missense variants, rs16841277, rs2228209, rs2230283, rs3741883, rs1716 and rs2272606, were found in 3 different patients, respectively. However, the three documented variants are rs13166360 with bipolar disorder, rs920829 with neuropathic pain, and rs6558702 with schizophrenia. Conclusion: We have identified 2 novel variants in ADHD children. SIFT score of all variants indicates that these substitutions have damaging effects on the protein function. Further screening studies are recommended for confirmation.

关键词： Next Generation DNA Sequencing Single Nucleotide Polymorphisms Saudi Children Attention-Deficit Hyperactivity Disorder ADHD

Effect of Fortifying Camel Milk with Sheep Milk on the Processing Properties, Chemical Composition and Acceptability of Cheeses

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Journal of Food Science and Engineering 2016年第4期6卷 215-226页

作者： Abdl Whap M. A. derar Ibtisam E. M. El Zubeir Department of Dairy Production Faculty of Animal Production University of Khartoum Khartoum P. O. Pox 321 Sudan