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Nonlinear Model Predictive Controller for Compensations of Single Line-to-ground Fault in Resonant Grounded Power Distribution Networks

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1113-1125页

作者： Warnakulasuriya Sonal Prashenajith Fernando mostafa Barzegar-Kalashani Md Apel Mahmud Shama Naz Islam nasser Hossenzadeh Faculty of Engineering and Environment Northumbria UniversityNewcastleUK School of Software and Electrical Engineering Swinburne University of TechnologyHawthornAustralia School of Engineering Deakin UniversityWaurn PondsAustralia

An nonlinear model predictive controller(NMPC)is proposed in this paper for compensations of single line-to-ground(SLG)faults in resonant grounded power distribution networks(RGPDNs),which reduces the likelihood of power line bushfire due to electric *** current compensation(RCC)inverters with arc suppression coils(ASCs)in RGPDNs are controlled using the proposed NMPC to provide appropriate compensations during SLG *** proposed NMPC is incorporated with the estimation of ASC inductance,where the estimation is carried out based on voltage and current measurements from the neutral point of the power distribution *** compensation scheme is developed in the discrete time using the equivalent circuit of *** proposed NMPC for RCC inverters ensures that the desired current is injected into the neutral point during SLG faults,which is verified through both simulations and control hardware-in-the-loop(CHIL)*** results are also presented against an integral sliding mode controller(ISMC)by demon-strating the capability of power line bushfire mitigation.

关键词： Fault current phase voltage nonlinear model predictive controller(NMPC) parameter adaptation parametric uncertainty power line bushfire

Investigation of SARS-CoV-2 Main Protease Potential Inhibitory Activities of Some Natural Antiviral Compounds Via Molecular Docking and Dynamics Approaches

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Phyton-International Journal of Experimental Botany 2022年第5期91卷 1089-1104页

作者： Nada M.mostafa Muhammad I.Ismail Amr M.El-Araby Dina M.Bahgat Ahmed M.Elissawy Ahmed M.mostafa Omayma A.Eldahshan Abdel nasser B.Singab Department of Pharmacognosy Faculty of PharmacyAin Shams UniversityCairo11566Egypt Department of Pharmaceutical Chemistry Faculty of PharmacyThe British University in EgyptCairo11837Egypt Department of Pharmaceutical Chemistry Faculty of PharmacyAin Shams UniversityCairo11566Egypt Department of Biochemistry Faculty of PharmacyAin Shams UniversityCairo11566Egypt Center for Drug Discovery and Development Research Ain Shams UniversityCairo11566Egypt

Coronaviruses caused an outbreak pandemic disease characterized by a severe acute respiratory distress syndrome leading to the infection of more than 200 million patients and the death of more than 4 million *** primary treatment is either supportive or *** products have an important role in the development of various ***,screening of natural compounds with reported antiviral activities can lead to the discovery of potential inhibitory entities against *** the current study,an in-silico molecular docking experiment was conducted on the effects of some of these natural antiviral phytoconstituents,(e.g.,procyanidin B2,theaflavin,quercetin,ellagic acid,caffeoylquinic acid derivatives,berginin,eudesm-1β,6α,11-triol and arbutin),on the crystal structure of SARS-CoV-2 main protease(PDB ID:6w63)using AutoDock-Vina *** of the docked compounds revealed good binding affinity,with procyanidin B2(–8.6 Kcal/mol)and theaflavin(–8.5 Kcal/mol)showing a better or similar binding score as the ligand(–8.5 Kcal/mol).Molecular dynamics simulations were carried out at 100 ns and revealed that procyanidin B2 forms a more stable complex with SARS-CoV-2 main protease than *** B2,theaflavin,and 4,5-dicaffeoylquinic acid were evaluated for toxicity by ProTox-II webserver and were non-toxic according to the predicted LD50 values and safe on different organs and ***,these phytoconstituents showed good ADME properties and acceptable lipophilicity,as evaluated using *** the tested compounds,procyanidin B2 showed the highest lipophilic *** is worth mentioning that these natural inhibitiors of SARS-CoV-2 main protease are components of green and black tea that can be used as a supporting supplement for COVID patients or as potential nuclei for further drug design and development campaigns.

关键词： Coronavirus natural products SARS-CoV-2 main protease molecular docking molecular dynamics tea

Hybrid of Distributed Cumulative Histograms and Classification Model for Attack Detection

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Computer Systems Science & Engineering 2023年第5期45卷 2235-2247页

作者： mostafa Nassar Anas M.Ali Walid El-Shafai Adel Saleeb Fathi E.Abd El-Samie Naglaa F.Soliman Hussah nasser AlEisa Hossam Eldin H.Ahmed Department of Electronics and Electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Alexandria Higher Institute of Engineering&Technology(AIET) AlexandriaEgypt Department of Computer Science Security Engineering LaboratoryPrince Sultan UniversityRiyadh11586Saudi Arabia Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia

Traditional security systems are exposed to many various attacks,which represents a major challenge for the spread of the Internet in the *** techniques have been suggested for detecting attacks using machine learning and deep *** significant advantage of deep learning is that it is highly efficient,but it needs a large training time with a lot of ***,in this paper,we present a new feature reduction strategy based on Distributed Cumulative Histograms(DCH)to distinguish between dataset features to locate the most effective *** histograms assess the dataset instance patterns of the applied features to identify the most effective attributes that can significantly impact the classification *** different models for detecting attacks using Convolutional Neural Network(CNN)and Long Short-Term Memory Network(LSTM)are also *** accuracy test of attack detection using the hybrid model was 98.96%on the UNSW-NP15 *** proposed model is compared with wrapper-based and filter-based Feature Selection(FS)*** proposed model reduced classification time and increased detection accuracy.

关键词： Feature selection DCH LSTM CNN security systems

Extracellular Biosynthesis of AgNPs by the Bacterium <i>Proteus mirabilis</i>and Its Toxic Effect on Some Aspects of Animal Physiology

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Advances in Nanoparticles 2014年第3期3卷 83-91页

作者： Mohammad S. Al-Harbi Bahig A. El-Deeb nasser mostafa Sayed A. M. Amer Department of Biology Faculty of Science Taif University Taif Saudi Arabia Department of Biology Faculty of Science Taif University Taif Saudi Arabia Department of Botany Faculty of Science Sohag University Sohag Egypt Department of Biology Faculty of Science Taif University Taif Saudi Arabia Department of Zoology Faculty of Science Cairo University Giza Egypt Department of Chemistry Faculty of Science Taif University Taif Saudi Arabia Department of Chemistry Faculty of Science Suez Canal University Ismailia Egypt

The development of a reliable green chemistry process for the biogenic synthesis of nanomaterials is an important aspect of current nanotechnology research. Silver nanoparticles (AgNPs) have been used as antimicrobial and disinfectant agents. However, there is limited information about its toxicity. Therefore, this study focused on the biosynthesis of AgNPs by the bacterium Proteus mirabilis and on determining its preliminary toxic effect on some aspects of animal physiology. A green method for the synthesis of AgNPs using culture supernatant of Proteus mirabilis has been developed in this study and the synthesized AgNPs were characterized by several techniques. The AgNPs showed a maximum absorbance at 445 nm on ultraviolet-visible spectra. The presence of proteins was identified by Fourier transform-infrared spectroscopy. The reduction of Ag+ to elemental silver was characterized by X-ray spectroscopy analysis. The transmission electron micrograph revealed the formation of polydispersed nanoparticles of 5 - 45 nm. The AgNPs were evaluated for their toxic effect on pregnant female albino rat. The result showed that liver enzymes (AST and ALP) were decreased significantly in the group treated with AgNPs. Mean corpuscular hemoglobin concentration also showed significant increase.

关键词： AgNPs P. mirabilis TEM X-Ray Liver Enzymes Blood Parameters

Evaluation of Azadirachta indica cultivated in Egypt against biofilm formation by Pseudomonas aeruginosa: Insights from molecular docking studies targeting LasR

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Infectious Diseases Research 2024年第4期5卷 13-26页

作者： Maram Mohammed Mabrouk Aboulwafa Nada Mohamed mostafa Fadia Salah youssef Omayma AbdElkarim Eldahshan Abdel nasser Badawi Singab Faculty of Pharmacy Department of PharmacognosyAin Shams UniversityCairo 11566Egypt Center of Drug Discovery Research and Development Faculty of PharmacyAin Shams UniversityCairo 11566Egypt.

Background:Azadirachta indica(***),commonly known as neem,is a widely distributed medicinal plant in Asia and Africa and is well known to have a wide spectrum of biological *** is considered a skin food that was traditionally used in different cultures to treat a wide range of skin *** was reported to possess antibacterial activity against Pseudomonas aeruginosa(***)which is considered the most common biofilm model *** study aims to investigate the ability of *** cultivated in Egypt to inhibit/reduce the biofilm formation by ***:The microtiter plate assay was used to evaluate the anti-biofilm activity of neem,cultivated in Egypt,leaves against *** as well as the ability to reduce the activity of *** investigate the phytocompounds responsible for their bioactivity and to explore potential interactions between their bioactive components and one of the quorum-sensing regulatory proteins of *** involved in biofilm formation,liquid chromatography-mass spectrometric and molecular docking studies were ***:Results showed that methanol extract of leaves can reduce the formation of *** biofilm at lower concentrations than those reported in other regions with 1.25 mg/mL as the optimum *** two-way analysis of variance revealed the significance of the extract effect and its concentration on the reduction of biofilm formation(Py-mass spectrometric study revealed the presence of fourteen compounds that belong to limonoids and *** docking analysis against LasR,the quorum-sensing regulatory protein,of *** supported these ***,a limonoid,has achieved the highest Libdock score of ***:It was concluded that ***,cultivated in Egypt,leaves can target LasR as a new mechanism of action for biofilm control by *** and therefore could be a good source of leads for ant

关键词： skin burn biofilm neem Azadirachta indica Pseudomonas aeruginosa nimbolinin

Chemical Composition,Cytotoxic and Anti-arthritic Activities of Hexane Extracts of Certain Schinus Species

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Journal of Pharmacy and Pharmacology 2021年第11期9卷 378-386页

作者： Heba A.S.El-Nashar Nada M.mostafa Omayma A.Eldahshan Abdel nasser B.Singab Department of Pharmacognosy Faculty of PharmacyAin Shams UniversityAbbassiaCairoEgypt Center for Drug Discovery Research and Development Faculty of PharmacyAin Shams UniversityCairoEgypt

The genus Schinus(Anacardiaceae)comprises about 29 species that are utilized in both traditional and current medicine to alleviate various disorders such as rheumatism,bronchial infections,stomach upset,menstrual disturbance,bronchitis,and *** this study we aimed to investigate the chemical composition of hexane extracts obtained from Schinus polygamous and Schinus terebinthifolius leaves as well as their cytotoxic and anti-arthritic *** GC-MS analysis of *** leaves revealed identification of fifty-five components:being betulin(6.54%),phytol acetate(5.27%),lupeol(3.96%),palmitic acid methyl ester(3.58%)and heptacosane(3.25%).While,seventeen compounds were identified in *** leaves,predominately characterized by phytol(14.70%),lupeol(13.33%),linolenic acid methyl ester(11.17%),palmitic acid methyl ester(7.74%),and 28-oxours-12-en-3-yl acetate(7.44%).Both extracts showed moderate cytotoxic activities against hepatocellular carcinoma cells with IC_(50) values of 102.65 and 65.55μg/mL,*** colorectal carcinoma cell line presented IC_(50) values of 217.78 and 83.55μg/mL,***,both extracts provided moderate anti-arthritic effects(IC_(50):80.12 and 63.09μg/mL,respectively)using protein denaturation test,compared to diclofenac sodium(IC_(50)=15.12μg/mL).

关键词： Schinus polygamous Schinus terebinthifolius Betulin Phytol Cytotoxic Anti-arthritic

Differences Among Self-Esteem in a Nationally Representative Sample of 15-17-year-Old Omani Adolescents

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Psychology Research 2019年第4期9卷 178-188页

作者： Kashef Zayed Badriya Al-Haddabi Lakshmanan Jeyaseelan Samir Al-Adawi Majid Al-Busafi Mansour Al Tauqi nasser Al-Rawahi mostafa Wally Fathi Thiyabat Sultan Qaboos University MuscatOman Christian Medical College VelloreIndia Sultan Qaboos youth Complex for Culture & Intertanmen SalalaOman Qatar University DohaQatar King Fahad University DhahranKingdom of Saudi Arabia

This study aimed to understand the association between self-esteem(SE)and gender,age,body mass index(BMI)and rural-urban dichotomy among Omani *** regression analyses were conducted using generalized linear models to study the impact of gender,age,BMI,and place of residence on the SE score after adjusting for other *** the 4,432 teenagers studied,47.4%were boys and 52.6%*** majority(64.4%)were from rural areas and 35.6%from urban areas of *** 23%were physically underweight,while 51%were normal and 26.2%were overweight or *** results of this study revealed that Omani girls have higher SE than *** also showed that no relationship between SE and ***,the results showed that children residing in rural areas had higher SE than those in city dweller.

关键词： SE BMI gender differences adolescents