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Optimizing solar energy efficiency with an improved hill-climbing maximum power point tracking control approach: hardware implementation

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Clean Energy 2024年第5期8卷 167-176页

作者： Yassine el Alami elmostafa Chetouani Hamza Mokhliss Fatima Ouerradi Mohssin Aoutoul Said Bounouar Rachid Bendaoud ahmed Faize Redouane Rmaily Laboratory of electronics Instrumentation and EnergeticFaculty of SciencesChouaïb Doukkali UniversityB.P 20El JadidaMorocco Laboratory ElectronicsInstrumentation and EnergyExploitation and Processing of Renewable EnergyDepartment of PhysicsFaculty of SciencesUniversity of Chouaïb DoukkaliEl JadidaMorocco STIC Lab. Department of PhysicsChouaïb Doukkali UniversityEl JadidaMorocco Complex Cyber Physical Systems Laboratory National Higher School of Arts and CraftsHassan II UniversityCasablancaMorocco Interdisciplinary Laboratory for Research in Science Educationand TrainingHigher School of Education and Training-BerrechidHassan First UniversityBerrechidMorocco Department of Physics Polydisciplinary FacultyUniversity of Mohamed PremierNadorMorocco

This article implements maximum power point tracking(MPPT)based on the improved hill-climbing algorithm for photovoltaic(PV)systems feeding resistive loads.A direct current-to-direct current boost converter is inserted between the PV system and the load to achieve *** converter is managed using MPPT based on the hill-climbing *** objective of this paper is to optimize the code program to achieve the best compromise between accuracy and rapidity by implementing this algorithm using a *** PV systems are tested under identical meteorological *** the first,an improved hill-climbing MPPT controller is used whereas,in the second,the conventional version is *** experimental results obtained show a signifi-cant enhancement in terms of speed for the improved algorithm with a value of 0.4 s for the response time and 3%for the oscillation power;those values remain satisfactory in terms of precision of the algorithm compared with the conventional system studied and the compared algorithm from the literature.

关键词： DC/DC boost converter hardware implementation improved hill climbing MPPT photovoltaic system

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Artificial Intelligence Prediction of One-Part Geopolymer Compressive Strength for Sustainable Concrete

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 525-543页

作者： mohamed abdel-Mongy Mudassir Iqbal M.Farag ahmed.M.Yosri Fahad Alsharari Saif eldeen A.S.Yousef Department of Civil Engineering College of EngineeringJouf UniversitySakaka72388Saudi Arabia Department of Civil Engineering University of Engineering and TechnologyPeshawar54890Pakistan Civil Engineering Department Faculty of EngineeringAl-Azhar UniversityCairo11884Egypt Civil Engineering Department Faculty of EngineeringAswan UniversityAswan81528Egypt

Alkali-activated materials/geopolymer(AAMs),due to their low carbon emission content,have been the focus of recent studies on ecological *** terms of performance,fly ash and slag are preferredmaterials for precursors for developing a one-part ***,determining the optimum content of the input parameters to obtain adequate performance is quite challenging and scarcely ***,in this study,machine learning methods such as artificial neural networks(ANN)and gene expression programming(GEP)models were developed usingMATLAB and GeneXprotools,respectively,for the prediction of compressive strength under variable input materials and content for fly ash and slag-based one-part *** database for this study contains 171 points extracted from literature with input parameters:fly ash concentration,slag content,calcium hydroxide content,sodium oxide dose,water binder ratio,and curing *** performance of the two models was evaluated under various statistical indices,namely correlation coefficient(R),mean absolute error(MAE),and rootmean square error(RMSE).In terms of the strength prediction efficacy of a one-part geopolymer,ANN outperformed *** and parametric analysis were also performed to identify the significant contributor to *** to a sensitivity analysis,the activator and slag contents had the most effects on the compressive strength at 28 *** water binder ratio was shown to be directly connected to activator percentage,slag percentage,and calcium hydroxide percentage and inversely related to compressive strength at 28 days and curing temperature.

关键词： Artificial intelligence techniques one-part geopolymer artificial neural network gene expression modelling sustainable construction polymers

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Volatile organic compounds for the detection of hepatocellular carcinoma—A scoping review

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iLIVER 2024年第1期3卷 45-51页

作者： Sayed Metwaly Alicja Psica Opeyemi Sogaolu Irfan ahmed Ashis Mukhopadhya Mirela Delibegovic mohamed Bekheit Division of Internal Medicine Aberdeen Royal InfirmaryNHS GrampianScotlandAberdeenAB252ZDUnited Kingdom Aberdeen Cardiovascular and Diabetes Centre School of MedicineMedical Sciences and NutritionUniversity of AberdeenForesterhill Health CampusAberdeenAB252ZDUnited Kingdom Department of Critical Care Medicine University of CalgaryAlberta T2N 2T9Canada Department of General Surgery Aberdeen Royal InfirmaryNHS GrampianScotlandAberdeen AB252ZDUnited Kingdom Pakistan Kidney and Liver Institute and Research Centre Lahore 54000Pakistan Hépatica Centre of Integrated HPB CareElite HospitalAlexandria 21325Egypt

Hepatocellular carcinoma(HCC)is an increasingly common and the second leading cause of cancer mortality worldwide with a 5-year survival rate about 12%.Less than 20%of HCC patients are eligible to curative treatment owing to the late ***,there is a need for a readily accessible,early screening *** scoping review critically appraises and synthesizes the current published knowledge about the use of exhaled volatile organic compounds(VOCs)as a potential noninvasive means for HCC detection aiming to advance this nascent field.A systematic electronic search was *** search strategy included all studies published until the 24th of March 2023 using a combination of relevant *** search yielded 9 publications using the Preferred Reporting Items for Systematic Reviews and Meta-analyses *** of the studies described in vitro experiments,and seven clinical studies were conducted on small groups of ***,42 headspace gases were analyzed in the in vitro ***,the clinical studies included 420 HCC patients and 630 *** studies reported potential role for a combination of VOCs in the diagnosis of ***,there is lack of *** there appears to be promise in VOCs research associated with HCC,there is no single volatile biomarker in exhaled breath attributed to HCC and data from extracted studies indicates a lack of *** multicentre population studies are required to verify the existence of VOCs linked to HCC.

关键词： Hepatocellular carcinoma Volatile organic compounds Metabolomics

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Sero-Prevalence and Risk factors of Contagious Bovine Pleuropneumonia (CBPP) in Afgoye District Lower Shabelle Region, Somalia

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Open Journal of Veterinary Medicine 2024年第2期14卷 11-20页

作者： ahmed mohamed ahmed Sumaya Hassan Ali abdisalam mohamed Ali abdirazack Saleban Osman Binti Abubakar mohamed abdifatah Mohamud Ibar Shafii abdullahi mohamed mohamed abdelrahman mohamed ahmed Ali Omar Zakaria Ibrahim Issack College of Veterinary Medicine Abrar University Mogadishu Somalia Faculty of Veterinary Medicine and Animal Husbandry Somali National University Mogadishu Somalia Faculty of Veterinary Science Benadir University Mogadishu Somalia

Contagious bovine Pleuropneumonia (CBPP) is an infectious and highly contagious respiratory disease of cattle and water buffalo, caused by the Mycoplasma mycoides subspecies mycoides. It induces significant economic losses and leads to a severe livestock production problem, negatively influencing people’s livelihoods of affected countries. In Somalia, there is no updated data on the prevalence and distribution of the disease. Hence, a descriptive cross-sectional study was conducted from September 2022 to June 2023 in different villages under the Afgoye District of lower Shabelle region, Somalia. The main purpose of this study is to assess the sero-prevalence and identify the associated risk factors for the occurrence of the disease. In this study, villages, age, sex, breed, and body condition were considered as risk factors. A total of 90 blood samples were collected and tested in the laboratory using the Anti-CBPP elisa kit test. Out of 90 serum samples from herd cattle, 32 were positive, resulting in an overall prevalence of 35.5%. In addition, we found a statistically significant variation between the prevalence of the disease and factors such as sex, age, body condition and breeds. In summary, the overall prevalence of Contagious bovine pleuropneumonia in this study area is worth to be considered because there is a low quality of health care and less awareness of the Contagious bovine Pleuropneumonia effects on herds, which warrants the official authorities to act and follow appropriate preventive and control measures to reduce the incidence of the disease and generate appropriate controlling and prevention measures in all regions of Somalia.

关键词： Contagious Bovine Pleuropneumonia Sero-Prevalence Cattle Somalia Mycoplasma Cross Sectional Study

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Forty Five Years of Working Hand in Hand: A Review and Outlook on Friendship Between China and Djibouti

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Contemporary World 2024年第2期 44-48页

作者： Wang Jing abdourahman mohamed ahmed School of Tourism of Yangzhou Polytechnic College Yangzhou University

Since the formal establishment of diplomatic relations in 1979,China and Djibouti have made significant progress in developing bilateral relations,with the two countries supporting and cooperating with each other and the two peoples sharing a strong *** since the 18th National Congress of the Communist Party of China,with the joint efforts of China and Djibouti,the bilateral relations have enjoyed comprehensive and rapid development.

关键词： Outlook development formal

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Neurosurgical and pharmacological management of dystonia

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World Journal of Psychiatry 2024年第5期14卷 624-634页

作者： Ali ahmed mohamed Steven Faragalla Asad Khan Garrett Flynn Gersham Rainone Phillip Mitchell Johansen Brandon Lucke-Wold Charles E Schmidt College of Medicine Florida Atlantic UniversityBoca RatonFL 33431United States Department of Neurosurgery and Brain Repair University of South FloridaTampaFL 33606United States Department of Neurosurgery University of FloridaGainesvilleFL 32611United States

Dystonia characterizes a group of neurological movement disorders characterized by abnormal muscle movements,often with repetitive or sustained contraction resulting in abnormal *** types of dystonia present based on the affected body regions and play a prominent role in determining the potential efficacy of a given *** most patients afflicted with these disorders,an exact cause is rarely identified,so treatment mainly focuses on symptomatic *** agents,such as oral anticholinergic administration and botulinum toxin injection,play a major role in the initial treatment of *** more severe and/or refractory cases,focal areas for neurosurgical intervention are identified and targeted to improve quality of *** brain stimulation(DBS)targets these anatomical locations to minimize dystonia *** ablation procedures and peripheral denervation surgeries also offer potential treatment to patients who do not respond to *** management options grant providers and patients the ability to weigh the benefits and risks for each individual patient *** review article explores these pharmacological and neurosurgical management modalities for dystonia,providing a comprehensive assessment of each of their benefits and shortcomings.

关键词： Botulinum toxin Magnetic resonance imaging-guided focused ultrasound Surgical ablation Deep brain stimulation Peripheral denervation surgery Antipsychotics

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Magnetoresistive properties of Ni-doped La_(0.7)Sr_(0.3)MnO_3 manganites

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Rare Metals 2016年第7期35卷 551-558页

作者： ahmed mohamed ahmed abd el-Moez ahmed mohamed Medhat abdelrady abdellateef Hassan ahmed abd el-Ghanny Physics Department Faculty of ScienceSohag University

Lao.7Sr0.3Mnl_xNixO3 （x = 0, 0.025, 0.050 and 0.075） ceramics were prepared by the conventional solid-state reaction method. The partial substitution of Mn by Ni2＋ leads to a decrease in cell volume as well as a structural transition from the rhombohedral to the orthorhombic structure. Ni2＋ doping increases the electrical resistivity, decreases the semiconductor-metal transition temperature （Tms） and relatively enhances the room temperature magnetoresistance （MR）, especially in x = 0.025 and around Tins. With respect to conduction mechanism, the small polaron hopping （SPH） and the variable range hopping （VRH） models were used to ex- amine conduction in the semiconducting region.

关键词： Manganites X-ray diffraction Structure electrical resistivity Magnetoresistance

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Bird Habitats in Urban Environments: A Case from an Urban Landfill in and around Tayba Al Hasanab Landfill, Khartoum, Sudan

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Journal of Environmental Protection 2024年第8期15卷 887-905页

作者： Mutasim Essa abdallah Adam Mawya ahmed elshafea mohamed Department of Biodiversity Higher Council of Environment Urban and Rural Promotion Khartoum Sudan Department of Environmental Impact Assessment and Authorization Higher Council of Environment Urban and Rural Promotion Khartoum Sudan

Managed open landfill sites can serve as crucial feeding grounds for birds. Studies have demonstrated that garbage dumps offer favorable feeding habitats for various trophic generalist species, including storks and scavenger raptors. This study aimed to assess bird diversity and abundance in and around Tayba Al Hasanab Landfill, Khartoum. A bird census was conducted using block counts in January 2021. A questionnaire complemented field observations, and interviews were conducted with landfill authorities and waste collectors to gather information on bird availability, numbers, and diversity. During the block counts, 23 bird species were recorded inside and around the landfill. These species directly relied on food resources available at and around the landfill, belonging to 8 orders and 11 families. The four most abundant species foraging at the landfill were Sparrow House (Passer domesticus) with 97 individuals, Black kite (Milvus migrans) with 67 individuals, cattle egret (Bubulcus ibis) with 42 individuals, and Laughing Dove (Spilopelia senegalensis) with 36 individuals. This suggests that these species are the primary exploiters of food resources at the landfill. The results indicate that all species are considered least concerned except the Egyptian Vulture (Neophron percnopterus), which is classified as endangered. Most of the interviewed individuals reported seeing birds in the study area. The study recorded instances of dead birds, such as a white stork colliding and being electrocuted with a transition line observed at different sites along transmission lines near the landfill. Surveys around Tayba landfill need to be conducted to identify deadly power lines for replacement or implement possible mitigation measures on power lines running parallel and close to the Tayba landfills. The avian community foraging at the landfill displayed fluctuations in abundance and interspecific interactions across seasons. Given that the substantial influx of birds to landfi

关键词： Bird Diversity Block Counts Endangered Species Collisions electrocutions Landfill Management

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Shear wave velocity prediction:A review of recent progress and future opportunities

Energy Geoscience

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Energy Geoscience 2024年第4期5卷 36-54页

作者： John Oluwadamilola Olutoki Jian-guo Zhao Numair ahmed Siddiqui mohamed elsaadany AKM Eahsanul Haque Oluwaseun Daniel Akinyemi Amany H.Said Zhaoyang Zhao State Key Laboratory of Petroleum Resources and Prospecting CNPC Key Laboratory of Geophysical ExplorationCollege of GeophysicsChina University of PetroleumBeijingChina Center of Excellence in Subsurface Seismic Imaging and Hydrocarbon Prediction Department of GeoscienceFaculty of Geoscience&Petroleum EngineeringUniversiti Teknologi PETRONAS(UTP)Malaysia Geology Department Faculty of ScienceAssiut UniversityAssiut71516Egypt

Shear logs,also known as shear velocity logs,are used for various types of seismic analysis,such as determining the relationship between amplitude variation with offset(AVO)and interpreting multiple types of seismic *** log is an important tool for analyzing the properties of rocks and interpreting seismic data to identify potential areas of oil and gas ***,these logs are often not collected due to cost constraints or poor borehole conditions possibly leading to poor data quality,though there are various approaches in practice for estimating shear wave *** this study,a detailed review of the recent advances in the various techniques used to measure shear wave(S-wave)velocity is carried *** techniques include direct and indirect measurement,determination of empirical relationships between S-wave velocity and other parameters,machine learning,and rock physics ***,this study creates a collection of employed techniques,enhancing the existing knowledge of this significant topic and offering a progressive approach for practical implementation in the field.

关键词： Shear wave(S-wave)velocity Direct and indirect measurement Empirical relationship Artificial intelligence(AI) Machine learning Rock physics model

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Enhancing Wireless Sensor Network Efficiency through Al-Biruni Earth Radius Optimization

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Computers, Materials & Continua 2024年第6期79卷 3549-3568页

作者： Reem Ibrahim Alkanhel Doaa Sami Khafaga ahmed mohamed Zaki Marwa M.Eid abdyalaziz A.Al-Mooneam abdelhameed Ibrahim S.K.Towfek 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 UniversityP.O.Box 84428Riyadh11671Saudi Arabia Computer Science and Intelligent Systems Research Center BlacksburgVirginia24060USA Delta Higher Institute for Engineering and Technology Mansoura35511Egypt Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt Artificial Intelligence and Computational Intelligence Research Center MeridenConnecticut06450USA School of ICT Faculty of EngineeringDesign and Information&Communications Technology(EDICT)Bahrain PolytechnicP.O.Box 33349Isa TownBahrain

The networks of wireless sensors provide the ground for a range of applications,including environmental moni-toring and industrial *** the networks can overcome obstacles like power and communication reliability and sensor coverage is the crux of network *** infrastructure planning should be focused on increasing performance,and it should be affected by the detailed data about node *** work recommends the creation of each sensor’s specs and radius of influence based on a particular geographical location,which will contribute to better network planning and *** using the ARIMA model for time series forecasting and the Al-Biruni Earth Radius algorithm for optimization,our approach bridges the gap between successive terrains while seeking the equilibrium between exploration and *** implementing adaptive protocols according to varying environments and sensor constraints,our study aspires to improve overall network *** compare the Al-Biruni Earth Radius algorithm along with Gray Wolf Optimization,Particle Swarm Optimization,Genetic Algorithms,and Whale Optimization about performance on real-world *** the most efficient in the optimization process,Biruni displays the lowest error rate at *** two other statistical techniques,like ANOVA,are also useful in discovering the factors influencing the nature of sensor data and network-specific *** to the multi-faceted support the comprehensive approach promotes,there is a chance to understand the dynamics that affect the optimization outcomes better so decisions about network design can be *** delivering better performance and reliability for various in-situ applications,this research leads to a fusion of time series forecasters and a customized optimizer algorithm.

关键词： Wireless sensor networks optimization ARIMA model BER algorithm metaheuristic algorithms

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