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Voltage imbalance mitigation in an active distribution network using decentralized current control

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Protection and Control of Modern Power Systems 2023年第2期8卷 68-84页

作者： ahmed M.M.nour ahmed A.Helal Magdi M.El-Saadawi ahmed Y.Hatata Alexandria Higher Institute of Engineering and Technology(AIET) AlexandriaEgypt Department of Electrical and Control Engineering Arab Academy for Science and Technology and Maritime TransportAlexandriaEgypt Department of Electrical Engineering Faculty of EngineeringMansoura UniversityMansouraEgypt Department of Electrical Engineering College of EngineeringShaqra UniversityShaqraKingdom of Saudi Arabia

Voltage imbalance(VI)is caused by the difference in connected single-phase load or generation in a low voltage distribution network(DN).VI increase in a smart distribution grid is due to the current practice of increasing single-phase distributed generators such as photovoltaic(PV)*** paper proposes a decentralized control method to mitigate VI using distributed batteries included in smart grid interfaced residential PV *** mitigate VI using the batteries in this way,five challenges must be overcome,i.e.,equalizing all battery stress currents within the DN,mitigating VI in abnormal conditions such as signal loss among bus controllers,being immune from the distorted feedback measurements,minimizing the steady-state error at different loads,and overcoming the insufficient number or capacity of the distributed batteries at the same *** fuzzy logic controllers(FLC)are proposed at each bus to overcome these five tasks based on a decentralized control *** proposed decentralized control based on FLC is compared with centralized control based on a PI *** proposed control method is tested and verified using simulations in the MATLAB/Simulink software,and the results validate the ability of the scheme to alleviate VI on a smart distribution network under both normal and abnormal conditions.

关键词： Fuzzy controller Distributed batteries Decentralized control Voltage imbalance Distributed PV

Association of anxiety- depressive disorders with irritable bowel syndrome among patients attending a rural family practice center: a comparative cross- sectional study

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General Psychiatry 2021年第6期34卷 16-23页

作者： Alaa Adel Mohammed Heba ahmed Moustafa Hebatallah nour-Eldein Rabab Atta Saudi Family Medicine Department Suez Canal UniversityIsmailiaEgypt

Background Comorbidity of irritable bowel syndrome(IBS)and psychiatric disorders is common,and the prevalence of at least one psychiatric disorder has been reported as high as 80%among patients with *** To explore the association of anxiety-depressive disorders with IBS and its different subtypes,and to evaluate the associations of lifestyle habits,dietary habits and sleeping quality with *** A comparative cross-sectional study was conducted at the AL-Mahsama Family Practice Center,Ismailia,*** was carried out between October 2019 and October *** were categorised into 175 patients with IBS,diagnosed using the Rome IV criteria,and 175 patients without IBS.A semistructured questionnaire was used to collect data on sociodemographic characteristics,lifestyle habits,dietary habits and sleep quality from both *** Hamilton Anxiety Rating Scale was used to assess anxiety symptoms,whereas the Beck Depression Inventory Second Edition was used to assess depression *** There was a high statistically significant difference between both groups with regard to age,education,occupation and socioeconomic status(SES),being a smoker,being physically inactive,having sleep disturbance and having irregular meals;being either obese or overweight was more reported in the IBS *** was a high statistically significant difference in the rate of anxiety and depression between patients with and without ***,moderate and severe anxiety were reported in 37.1%,42.9%and 20.0%of patients with IBS while most(80.0%)of the patients without IBS reported mild *** depression,mild,moderate and severe depression were reported in 60.0%,14.3%and 25.7%of the patients with IBS while most(82.9%)of the non-IBS participants reported mild *** The study shows a significant association between anxiety-depressive disorders and IBS,but no significant associations between anxiety-depressive disorders and IBS subtypes.

关键词： patients disorders sectional

Spectrofluorimetric and Spectrophotometric Stability- Iwndicating Methods for the Analysis of Veralipride in Presence of Its Degradants and in Spiked Human Plasma

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Chinese Journal of Chemistry 2012年第1期30卷 183-189页

作者： Salama,Nahla.nour El Din ahmed Salem,Maissa Yacoub Abd El Halim,Lobna Mohammed Abdel Fattah,Laila EI-Sayed National Organization for Drug Control and Research(NODCAR) 6 Abu Hazem StreetPyramids AveP.O.Box 29GizaEgypt Analytical Chemistry Department Faculty of PharmacyCairo UniversityCairoEgypt Analytical Chemistry Department Faculty of PharmacyMisr University for Science and Technology6th of OctoberEgypt

Spectrofluorimetric and spectrophotometric stability-indicating methods were developed and validated for analysis of veralipride （Ver） in presence of its hydrolytic and oxidative degradants. The spectrofluorimetric method was based on direct measurement of the intrinsic fluorescence of Ver at 366 nm after excitation at 299 nm using sodium lauryl sulfate （SLS） as micelle enhancer. The fluorescence intensity plot was linear over the concentration range 1.0-10.0 ***-1. The high sensitivity of the method allowed its successful application to the analysis of Ver in spiked human plasma. Two other methods were developed. They are based on the oxidative coupling reac- tion of Vet with 3-methyl benzothiazolin-2-one hydrazone （MBTH） hydrochloride in presence of ceric ammonium sulphate in an acidic medium. The first method depends on spectrophotometric measurement of the stable green colored oxidative coupling product at 660 nm. The different experimental parameters affecting the reaction were optimized. Linearity range is 10.0--100.0 ~tgomL-1. The second method depends on a fluorescence quenching effect of Vet on the fluorescence of Ce3＋. The difference in fluorescence intensity was measured at 380 nm after excitation at 300 nm. This method is applicable over the concentration ranges 0.25-2.50 pg-mL-1. The methods were validated according to the ICH guidelines. They were successfully applied for the analysis of Ver in drug substance, drug product and in laboratory prepared mixtures containing different percentages of hydrolytic and oxidative degradants.

关键词： veralipride micelle-enhanced fluorescence MBTH validation stability fluorescence quenching Ce3+

Comparative Analysis of Polyphenolic and Antioxidant Constituents in Dried Seedlings and Seedless Acacia nilotica Fruits

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Journal of Analysis and Testing 2018年第4期2卷 352-355页

作者： Amani AbdErahman Olalere Olusegun Abayomi AbdElhafiz Eltahir ahmed Abdurahman Hamid nour Rosli bin Mohd Yunus Ghada Mohamed Ibrahim Nassereldeen ahmed Kabbashi Faculty of Science and Technology Omdurman Islamic UniversityOmdurmanSudan Faculty of Chemical and Natural Resources Engineering Universiti Malaysia PahangGambangMalaysia Faculty of Animal Production Bahri UniversityBahriSudan International Islamic University Malaysia MalaysiaKOEBTE EngineeringKuala LumpurMalaysia

The phenolic and antioxidant constituents in Acacia nilotica fruits have become an important source of medicinal and thera-peutic benefit with powerful biological *** study investigated the phenolic content and antioxidant capacity of powdered Acacia fruits with seeds and without *** phenolic content and antioxidant capacities in them were deter-mined using Folin-Ciocalteu and DPPH free radical-scavenging *** total phenolic and antioxidants of *** with seeds were spectrophotometrically determined to be 47.61 and 6.18%greater than when the seeds were removed from the dried fruits,*** LC-MS/QTOF analysis shows the presence of 282 and 214 phenolic compounds in the methanol extracts of *** with seeds and without seeds,*** present study,therefore,revealed that dried *** fruits with seeds have higher total phenolic content,antioxidant capacity,and bioactive constituents,which indi-cated that they have more medicinal value than fruits without seeds.

关键词： Acacia nilotica Liquid chromatography-mass spectrometry Total phenolic content DPPH antioxidant capacity

A Secured Message Transmission Protocol for Vehicular Ad Hoc Networks

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Computers, Materials & Continua 2021年第7期68卷 229-246页

作者： A.F.M.Suaib Akhter A.F.M.Shahen Shah Mohiuddin ahmed nour Moustafa UnalÇavu¸soglu Ahmet Zengin Department of Computer Engineering Sakarya UniversitySakarya54050Turkey Department of Electrical and Electronics Engineering Istanbul Gelisim UniversityIstanbulTurkey School of Science Edith Cowan UniversityPerthWA6027Australia School of Engineering and Information Technology UNSWCanberra BC2610Australia

Vehicular Ad hoc Networks(VANETs)become a very crucial addition in the Intelligent Transportation System(ITS).It is challenging for a VANET system to provide security services and parallelly maintain high throughput by utilizing limited *** overcome these challenges,we propose a blockchain-based Secured Cluster-based MAC(SCB-MAC)*** nearby vehicles heading towards the same direction will form a cluster and each of the clusters has its blockchain to store and distribute the safety *** message which contains emergency information and requires Strict Delay Requirement(SDR)for transmission are called safety messages(SM).Cluster Members(CMs)sign SMs with their private keys while sending them to the blockchain to confirm authentication,integrity,and confidentiality of the message.A Certificate Authority(CA)is responsible for physical verification,key generation,and privacy preservation of the *** implemented a test scenario as proof of concept and tested the safety message transmission(SMT)protocol in a real-world *** and storage overhead analysis shows that the proposed protocol for SMT implements security,authentication,integrity,robustness,non-repudiation,*** maintaining the *** that are less important compared to the SMs are called non-safety messages(NSM)and vehicles use RTS/CTS mechanism for NSM *** studies show that the proposed NSM transmission method maintains 6 times more throughput,2 times less delay and 125%less Packet Dropping Rate(PDR)than traditional MAC *** results prove that the proposed protocol outperforms the traditional MAC protocols.

关键词： Ad hoc networks data security digital signatures distributed storage intelligent vehicles vehicular ad hoc networks wireless communication

Automated Multi-Document Biomedical Text Summarization Using Deep Learning Model

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Computers, Materials & Continua 2022年第6期71卷 5799-5815页

作者： ahmed S.Almasoud Siwar Ben Haj Hassine Fahd N.Al-Wesabi Mohamed K.nour Anwer Mustafa Hilal Mesfer Al Duhayyim Manar ahmed Hamza Abdelwahed Motwakel Department of Information Systems College of Computer and Information SciencesPrince Sultan UniversitySaudi Arabia Department of Computer Science College of Science and Arts at MahayilKing Khalid UniversitySaudi Arabia Faculty of Computer and IT Sana’a UniversitySana’aYemen Department of Computer Science College of Computing and Information SystemUmm Al-Qura UniversitySaudi Arabia Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia Department of Natural and Applied Sciences College of Community-AflajPrince Sattam bin Abdulaziz UniversitySaudi Arabia

Due to the advanced developments of the Internet and information technologies,a massive quantity of electronic data in the biomedical sector has been exponentially *** handle the huge amount of biomedical data,automated multi-document biomedical text summarization becomes an effective and robust approach of accessing the increased amount of technical and medical literature in the biomedical sector through the summarization of multiple source documents by retaining the significantly informative ***,multi-document biomedical text summarization acts as a vital role to alleviate the issue of accessing precise and updated *** paper presents a Deep Learning based Attention Long Short Term Memory(DLALSTM)Model for Multi-document Biomedical Text *** proposed DL-ALSTM model initially performs data preprocessing to convert the available medical data into a compatible format for further ***,the DL-ALSTM model gets executed to summarize the contents from the multiple biomedical *** order to tune the summarization performance of the DL-ALSTM model,chaotic glowworm swarm optimization(CGSO)algorithm is *** experimentation analysis is performed to ensure the betterment of the DL-ALSTM model and the results are investigated using the PubMed *** comparative result analysis is carried out to showcase the efficiency of the proposed DL-ALSTM model with the recently presented models.

关键词： Biomedical text summarization healthcare deep learning lstm parameter tuning

Comparative study of the characterisation and extraction techniques of polyphenolic compounds from Acacia seyal gum

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Food Quality and Safety 2022年第1期6卷 24-33页

作者： ahmed A.M.Elnour Mohamed E.S.Mirghani Nassereldeen A.Kabbashi Khalid Hamid Musa Fahimeh Shahabipour Nureddin Ashammakhi nour Hamid Abdurahman International Institute for Halal Research and Training International Islamic University MalaysiaKuala LumpurMalaysia Bioenvironmental Engineering Research Centre Biotechnology Engineering DepartmentKuliyah of EngineeringInternational Islamic University MalaysiaKuala LumpurMalaysia Institute of Gum Arabic&Desertification Studies University of KordofanElobiedSudan Department of Food Science and Human Nutrition College of Agriculture and Veterinary MedicineQassim UniversityBuraydahKingdom of SaudiArabia Skin Research Centre Shahid Beheshti University of Medical SciencesTehranIran Department of Bioengineering Henry Samueli School of EngineeringUniversity of CaliforniaLos AngelesCAUSA Department of Biomedical Engineering College of EngineeringMichigan State UniversityEast LansingMIUSA Centre of Excellence for Advanced Research in Fluid Flow University Malaysia PahangGambangMalaysia

Background Acacia seyal gum(ASG)is an abundant source of natural polyphenolic compounds(NPPCs)and antioxidant activity with numerous benefits and is often used in cancer *** type of extraction technique can significantly impact the yield and isolation of NPPCs from *** traditional use of maceration extraction reportedly yields fewer *** This study investigated five extraction techniques for NPPCs and ASG antioxidant activity,namely:homogenisation,shaking,ultrasonication,magneticstirring,*** and methods The evaluation of the antioxidant activity(AoA)of the extracted NPPCs from ASG used five assays,namely:total flavonoids content,Folin-Ciocalteu index,2,2-diphenyl-1-picrylhydrazyl radical scavenging activity,ferric reducing antioxidant power,and cupric *** To minimise the data set dimensionality requires principal component *** ultrasonic and maceration techniques were the best techniques to extract NPPCs and examine the AoA of ASG,with a high correlation between the NPPCs and ***,the maceration process was slow(12 h)compared to ultrasonication(1 h).Slow extraction can result in a decline of the NPPCs due to polyphenol oxidase-enzyme and impact *** These findings provide an essential guide for the choice of extraction techniques for the effective extraction of NPPCs from ASG and other plant materials.

关键词： Polyphenolic extraction gum Arabic comparison of techniques principal component analysis ultrasonication

Virtual orthopedic assessment:Main principles and specific regions

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World Journal of Orthopedics 2021年第9期12卷 672-684页

作者： Khaled M Emara Ramy ahmed Diab Mohamed Amr Shady Abdelghaffar Mahmoud Mohamed nour ahmed Abdelsalam Mahmoud ahmed Elshobaky Mona Farhan Mostafa Gemeah ahmed K Emara Orthopedic Surgery Department Ain Shams UniversityCairo 11566Egypt Orthopedic Surgery Department Bank Ahly HospitalCairo 11566Egypt Department of Health Care Innovation Arizona State UniversityArizonaAZ 85287United States Department of Orthopedic Surgery Cleveland ClinicOhioNY 44195United States

Telemedicine was originally created as a way to treat patients who were located in remote places far away from local health facilities or in areas with shortages of medical *** is still used today to address those problems,and is increasingly becoming a tool for convenient medical *** the emergence of pandemics,telemedicine became almost a mandatory and valuable option for continuing to provide medical care in various *** the threat of pandemic progress has continued for months and may continue for years,it is essential to validate existing tools to maintain clinical assessment and patient treatment to avoid negative consequences of the lack of medical ***,the establishment of a virtual assessment technique that can be conducted effectively is of outmost importance as a way of adapting to the current *** study evaluated the role of telemedicine in the assessment of various orthopedic pathologies by means of a systematic virtual evaluation.

关键词： Telemedicine Virtual assessment Orthopedics Epidemic diseases

A Shuffling-Steganography Algorithm to Protect Data of Drone Applications

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Computers, Materials & Continua 2024年第11期81卷 2727-2751页

作者： Ahamad B.Alkodre nour Mahmoud Bahbouh Sandra Sendra Adnan ahmed Abi Sen Yazed Alsaawy Saad Said Alqahtany Abdallah Namoun Hani Almoamari Faculty of Computer and Information Systems Islamic UniversityAl-Madinah42351Saudi Arabia Department of Information and Communication Sciences Granada UniversityGranada18071Spain Instituto de Investigación para la Gestión Integrada de Zonas Costeras Universitat Politècnica de ValènciaValencia46730Spain Department of Graduate Studies&Scientific Research University of Prince MugrinAl-Madinah42351Saudi Arabia

In Saudi Arabia,drones are increasingly used in different sensitive domains like military,health,and agriculture to name a ***,drone cameras capture aerial images of objects and convert them into crucial data,alongside collecting data from distributed sensors supplemented by location *** interception of the data sent from the drone to the station can lead to substantial *** address this issue,highly confidential protection methods must be *** paper introduces a novel steganography approach called the Shuffling Steganography Approach(SSA).SSA encompasses five fundamental stages and three proposed algorithms,designed to enhance security through strategic encryption and data hiding ***,this method introduces advanced resistance to brute force attacks by employing predefined patterns across a wide array of images,complicating unauthorized *** initial stage involves encryption,dividing,and disassembling the encrypted data.A small portion of the encrypted data is concealed within the text(Algorithm 1)in the third ***,the parts are merged and mixed(Algorithm 2),and finally,the composed text is hidden within an image(Algorithm 3).Through meticulous investigation and comparative analysis with existing methodologies,the proposed approach demonstrates superiority across various pertinent criteria,including robustness,secret message size capacity,resistance to multiple attacks,and multilingual support.

关键词： Health of palm trees steganography based text steganography based image drone fog computing security