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Three-dimensional flow of Powell–Eyring nanofluid with heat and mass flux boundary conditions

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Chinese Physics B 2016年第7期25卷 261-268页

作者： Tasawar Hayat Ikram Ullah Taseer Muhammad ahmed Alsaedi Sabir ali Shehzad Department of Mathematics Quaid-I-Azam University Nonlinear Analysis and Applied Mathematics (NAAM) Research Group Department of Mathematics Faculty of ScienceKing Abdulaziz University Department of Mathematics Comsats Institute of Information Technology

This article investigates the three-dimensional flow of Powell–Eyring nanofluid with thermophoresis and Brownian motion effects. The energy equation is considered in the presence of thermal radiation. The heat and mass flux conditions are taken into account. Mathematical formulation is carried out through the boundary layer approach. The governing partial differential equations are transformed into the nonlinear ordinary differential equations through suitable variables. The resulting nonlinear ordinary differential equations have been solved for the series solutions. Effects of emerging physical parameters on the temperature and nanoparticles concentration are plotted and discussed. Numerical values of local Nusselt and Sherwood numbers are computed and examined.

关键词： three-dimensional flow Powell–Eyring fluid nanoparticles thermal radiation

Use of Scrapped Rubber Tires for Sustainable Construction of Manhole Covers

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Journal of Renewable Materials 2021年第5期9卷 1013-1029页

作者： Sadaqat Ullah Khan Afzal ahmed Sajjad ali Ayesha Ayub ahmed Shuja Muhammad Ahsan Shahid Department of Urban and Infrastructure Engineering NED University of Engineering and TechnologyKarachi75270Pakistan Department of Civil Engineering NED University of Engineering and TechnologyKarachi75270Pakistan

Scrapped tires from vehicles are produced in large quantities. Despite numerous existing uses of scrapped tires, alarge quantity ends up at the landfill sites, which contributes to environmental degradation. The development ofmore applications of scrapped tire usage can reduce the disposal of tires at landfill sites. This research proposes anovel use of scrapped tires by using the strips taken from scrapped tires in replacement of steel bars as reinforcement. Manhole covers were produced using scrapped tires by completely replacing the steel with scrapped *** different samples of manhole covers were prepared and tested. The highest bearing capacity of 25.5 kN wasrecorded with a sample of 100 mm thickness made with cementitious composite, which is 2.25 times higher thanthe bearing capacity of a conventional reinforced-concrete manhole cover. The use of manhole covers made withscrapped tires can effectively address the theft issue of manhole covers. The lifecycle cost analysis shows that themanhole cover made with scrapped tires is 3.4 times more cost-effective in comparison with the conventionalmanhole cover. This research shows a new avenue of the potential use of scrapped tires as reinforcement in structures, which can improve sustainable construction practices.

关键词： Scrapped tires sustainability manhole cover waste management recycling

Azospirillum brasilense and Saccharomyces cerevisiae as Alternative for Decrease the Effect of Salinity Stress in Tomato(Lycopersicon esculentum)Growth

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Phyton-International Journal of Experimental Botany 2022年第1期91卷 21-32页

作者： ali Abdelmoteleb Daniel Gonzalez-Mendoza ahmed Mohamed Elbaalawy Botany Department Faculty of AgricultureMenoufia UniversityShebin El-KomPo 32511Egypt Instituto de Ciencias Agrícolas Universidad Autónoma de Baja CaliforniaCarretera a Delta s/n Ejido Nuevo LeónBaja CaliforniaCP 21705México Department of Soil Science Faculty of AgricultureMenoufia UniversityShebin El-KomPo 32511Egypt

The salinity stress is one of the most relevant abiotic stresses that affects the agricultural *** present study was performed to study the improvement of the salt tolerance of tomato plants which is known for their susceptibility to salt *** present study aimed to assess to what extent strain Azospirillum brasilense(N040)and Saccharomyces cerevisiae improve the salt tolerance to tomato plants treated with different salt *** inoculant strain ***(N040)was previously adapted to survive up to 7%NaCl in the basal media.A greenhouse experiment was conducted to evaluate the effect of this inoculation on growth parameter such as:plant height,root length,fresh and dry weight,fruits fresh weight,chlorophyll content,proline and total soluble sugar in tomato plants under salt stress *** results revealed that co-inoculation of Azospirillum brasilense(N040)and Saccharomyces cerevisiae significantly increased the level of proline(8.63 mg/g FW)and total soluble sugar(120 mg/g FW)of leaves under salinity condition comparing to non-inoculated plants(2.3 mg/g FW and 70 mg/g FW,respectively).Plants co-inoculated with adapted strain of *** and *** showed the highest significant(paline soils.

关键词： Salinity stress tomato proline exopolysaccharides microorganism

Rate of elapsed polymerization of hydroxyethylacrylate gel induced by gamma irradiation

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Nuclear Science and Techniques 2008年第4期19卷 218-222页

作者： Khalid ahmed RABAEH Elias SAION Mohammad ahmed ali OMER Azhar Abdul RAHMAN Mohammad Yusif HUSSAIN Shahrim ISKANDAR Noria Mohammad ali Department of Physics Universiti Putra Malaysia 43400 UPM SerdangSelangorMalaysia Nuclear Agency of Malaysia

The rate of elapsed polymerization of polyhydroxyethylacrylate in gelatin has been studied to investigate the effect of co-monomers consumption at a given dose. The polymer gel dosimeters consisted of 2%～4% N,N-methyelene-bis-acrylamide cross-linker,2%～4% 2-hydroxyethylacrylate monomer and gelatin at 3% and 5%. The dosimeters were irradiated by using 60Co teletherapy γ-ray source up to 20 Gy at a constant dose rate. The relaxation rate of water proton in the dosimeters at different doses and co-monomer concentrations were measured using a nuclear magnetic resonance spectroscopy. The rate of elapsed polymerization decreases with increasing the dose and the initial concentration of co-monomers. The rate of consumption of co-monomers increases with an increase of the polymerization and the gelatin content of the polymer gel.

关键词：高聚物缓和速度剂量器射线

Surgery for Crohn’s disease:upfront or last resort?

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Gastroenterology Report 2022年第1期10卷 188-194页

作者： U.ahmed ali Ravi P.Kiran Division of Colorectal Surgery New York–Presbyterian/Columbia University Medical CenterNew YorkUSA

Crohn’s disease(CD)can involve the entire gastrointestinal tract from the mouth to the anus and can lead to a constellation of *** the advancement of effective medical treatments for CD,a tendency has emerged to consider surgical treatment as a last *** potentially has the disadvantage of delaying surgery and if it fails might leave patients sicker,less well nourished,and with more severe *** with most non-malignant diseases,the choice of surgery vs medical treatment is a patient’s personal preference under the guidance of the treating physician,except in extreme situations where surgery might be the only *** this article,we will discuss the available evidence regarding the optimal timing of surgery in CD,focusing on whether early surgery can bring benefits in terms of disease control,symptom relief,and quality of life.

关键词： surgery timing Crohn’s disease outcome

Duodeno-jejunal junction dyssynergia: Description of a novel syndrome

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World Journal of Gastroenterology 2007年第30期13卷 4112-4116页

作者： ahmed Shafik Ismail A Shafik Olfat El Sibai ali A Shafik Department of Surgery and Experimental Research Faculty of Medicine Cairo University Cairo Egypt Department of Surgery Faculty of Medicine Menoufia University Shebin El-Kom Egypt

AIM： To investigate the hypothesis that duodeno-jejunal dyssynergia existed at the duodeno-jejunal junction.METHODS： Of 112 patients who complained of epigastric distension and discomfort after meals, we encountered nine patients in whom the duodeno-jejunal junction did not open on duodenal contraction. Seven healthy volunteers were included in the study. A condom which was inserted into the ist duodenum was filled up to 10 mL with saline in increments of 2 mL and pressure response to duodenal distension was recorded from the duodenum, duodeno-jejunal junction and the jejunum.RESULTS： In healthy volunteers, duodenal distension with 2 and 4 mL did not produce pressure changes, while 6 and up to 10 mL distension effected significant duodenal pressure increase, duodeno-jejunal junction pressure decrease but no jejunal pressure change. In patients, resting pressure and duodeno-jejunal junction and jejunal pressure response to 2 and 4 mL duodenal distension were similar to those of healthy volunteers. Six and up to 10 mL 1^st duodenal distension produced significant duodenal and duodeno-jejunal junction pressure increase and no jejunal pressure change.CONCLUSION： Duodeno-jejunal junction failed to open on duodenal contraction, a condition we call ＇duodenojejunal junction dyssynergia syndrome＇ which probably leads to stagnation of chyme in the duodenum and explains patients＇ manifestations.

关键词： Epigastric distension Vomiting Nausea Dyspepsia Chyme

Effect of thermal cutaneous stimulation on the gastric motor activity:Study of the mechanism of action

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World Journal of Gastroenterology 2008年第14期14卷 2226-2229页

作者： ahmed Shafik ali A Shafik Olfat El Sibai Ismail A Shafik Department of Surgery and Experimental Research Faculty of Medicine Cairo University Cairo 11121 Egypt Department of Surgery Faculty of Medicine Menoufia University Shebin El-Kom Egypt

AIM:To investigate the mechanism of action of thermal cutaneous stimulation on the gastric motor inhibition. METHODS:The gastric tone of 33 healthy volunteers (20 men, mean age 36.7 ± 8.4 years) was assessed by a barostat system consisting of a balloon-ended tube connected to a strain gauge and air-injection system. The tube was introduced into the stomach and the balloon was inflated with 300 mL of air. The skin temperature was elevated in increments of 3℃ up to 49℃ and the gastric tone was simultaneously assessed by recording the balloon volume variations expressed as the percentage change from the baseline volume. The test was repeated after separate anesthetization of the skin and stomach with lidocaine and after using normal saline instead of lidocaine. RESULTS:Thermal cutaneous stimulation resulted in a significant decrease of gastric tone 61.2% ± 10.3% of the mean baseline volume. Mean latency was 25.6 ± 1.2 ms. After 20 min of individual anesthetization of the skin and stomach, thermal cutaneous stimulation produced no significant change in gastric tone. CONCLUSION:Decrease in the gastric tone in response to thermal cutaneous stimulation suggests a reflex relationship which was absent on individual anesthetization of the 2 possible arms of the reflex arc:the skin and the stomach. We call this relationship the"cutaneo-gastric inhibitory reflex". This reflex may have the potential to serve as an investigative tool in the diagnosis of gastric motor disorders, provided further studies are performed in this respect.

关键词： Gastric tone Barostat Gastric disorders

Evaluation of the Environmental, Social Effects for the Egyptian National Railways Restructuring

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Journal of Transportation Technologies 2015年第1期5卷 24-36页

作者： mahmoud ahmed Mousa ali Mohamed Abdelnaby El Sayed Department of Civil Engineering Faculty of Engineering Minia University Minia Egypt Department of Track and Railway Operations Technical University of Berlin Berlin Germany

This paper presents the main findings of the environmental and social impact assessment (ESIA) for the Egyptian national railways restructuring. This paper consists of the two parts: 1) modernizing the signaling system on the Arab El Raml-Alexandria Line and creating a Central Traffic Management Center in Tanta;and 2) renewing 200 km of track in Lower and Upper Egypt. The purpose of this evaluation is to identify and examine the potential socio-cultural, economic, and physical impacts of the railway restructuring, and propose measures to mitigate its adverse impacts, and develop plans for managing and monitoring the environmental aspects of the railway restructuring. This paper describes outlines of the environmental and social sensitivities of the railway restructuring area, potentially significant impacts of the proposed project and plans for their mitigation. Detailed information on the environmental and socio economic settings of the railway restructuring, components and activities of the proposed project and the results of the environmental and social impact assessment studies are presented in the body of the paper.

关键词： Railway Railway Restructuring Environmental Quality Socio Economic Volume of Populations

Enhanced Gorilla Troops Optimizer with Deep Learning Enabled Cybersecurity Threat Detection

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Computer Systems Science & Engineering 2023年第6期45卷 3037-3052页

作者： Fatma S.Alrayes Najm Alotaibi Jaber S.Alzahrani Sana Alazwari Areej Alhogail ali M.Al-Sharafi mahmoud Othman Manar ahmed Hamza Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Prince Saud Al Faisal Institute for Diplomatic Studies RiyadhSaudi Arabia Department of Industrial Engineering College of Engineering at AlqunfudahUmm Al-Qura UniversitySaudi Arabia Department of Information Technology College of Computers and Information TechnologyTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Information Systems College of Computer and Information SciencesKing Saud UniversitySaudi Arabia Department of Computer Science College of Computers and Information TechnologyUniversity of BishaSaudi Arabia Department of Computer Science Faculty of Computers and Information TechnologyFuture University in EgyptNew Cairo11835Egypt Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia

Recent developments in computer networks and Internet of Things(IoT)have enabled easy access to *** the government and business sectors face several difficulties in resolving cybersecurity network issues,like novel attacks,hackers,internet criminals,and so ***,malware attacks and software piracy pose serious risks in compromising the security of *** can steal confidential data which results infinancial and reputational *** advent of machine learning(ML)and deep learning(DL)models has been employed to accomplish security in the IoT cloud *** article pre-sents an Enhanced Artificial Gorilla Troops Optimizer with Deep Learning Enabled Cybersecurity Threat Detection(EAGTODL-CTD)in IoT Cloud *** presented EAGTODL-CTD model encompasses the identification of the threats in the IoT cloud *** proposed EAGTODL-CTD mod-el mainly focuses on the conversion of input binaryfiles to color images,where the malware can be detected using an image classification *** EAG-TODL-CTD model pre-processes the input data to transform to a compatible *** threat detection and classification,cascaded gated recurrent unit(CGRU)model is exploited to determine class ***,EAGTO approach is employed as a hyperparameter optimizer to tune the CGRU parameters,showing the novelty of our *** performance evaluation of the EAGTODL-CTD model is assessed on a dataset comprising two class labels namely malignant and *** experimental values reported the supremacy of the EAG-TODL-CTD model with increased accuracy of 99.47%.

关键词： Cybersecurity computer networks threat detection internet of things cloud computing deep learning