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Effect of an Inclined Slots on the Power Consumption and Vortices Size in a Rushton Turbine Agitated Tank

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Chinese Journal of Mechanical Engineering 2023年第6期36卷 261-276页

作者： Sarra Youcefi mohamed Bouzit abdelkader Youcefi Abderrahim Mokhefi Laboratory of Applied Mechanics Department of Mechanical EngineeringUniversity of Sciences and Technology of OranOran 31000Algeria Laboratory of Maritime Sciences and Engineering Department of Marine EngineeringUniversity of Science and Technology of OranOran 31000Algeria Laboratory of Aeronautics and Propulsion Systems Department of Mechanical EngineeringUniversity of Science and Technology of OranOran 31000Algeria Laboratory of Mechanics Modeling and ExperimentationDepartment of Mechanical EngineeringTahri Mohamed University of BecharBechar 08000Algeria

Mechanical agitation in baffled vessels with turbines plays a vital role in achieving homogeneous fluid mixing and promoting various transfer ***,designing vessels with optimal energy efficiency and flow dynamics is essential to enhance operational performance and eliminate flow ***,the present research focuses on a numerical investigation of the impact of inclined slots with different angles installed at the side-wall of a cylindrical vessel equipped with a Rushton *** study explores power consumption and vortex size while considering various rotation directions of the impeller with different rotation *** numerical simulations are conducted for Reynolds numbers ranging from 104 to 105,using the RANS k-εturbulence model to govern the flow inside the stirred vessel,accounting for mass and momentum *** results have shown that the installation of slots reduces power consumption and vortex size compared to conventional vessel ***,increasing the slot angle from 0 to 32.5°further reduces energy consumption and vortex size,especially with negative rotation *** the other hand,increasing the Reynolds numbers leads to a decrease in power consumption and an increase in vortex *** present research therefore proposes a design for con-structing Rushton-turbine stirred vessels offering optimal operation,characterized by reduced energy consumption and minimized vortex size.

关键词： Mixing Stirred tank Rushton turbine Inclined slots Hydrodynamic Power consumption Vortices size

Optimal Deep Convolution Neural Network for Cervical Cancer Diagnosis Model

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Computers, Materials & Continua 2022年第2期70卷 3295-3309页

作者： mohamed Ibrahim Waly mohamed Yacin Sikkandar mohamed abdelkader Aboamer Seifedine Kadry Orawit Thinnukool Department of Medical Equipment Technology College of Applied Medical SciencesMajmaah UniversityAl Majmaah11952Saudi Arabia Faculty of Applied Computing and Technology Noroff University CollegeKristiansand4608Norway Research Group of Embedded Systems and Mobile Application in Health Science College of ArtsMedia and TechnologyChiang Mai UniversityChiang Mai50200Thailand

Biomedical imaging is an effective way of examining the internal organ of the human body and its *** important kind of biomedical image is Pap smear image that iswidely employed for cervical cancer *** cancer is a vital reason for increased women’s mortality *** screening of pap smear images is essential to assist the earlier identification and diagnostic process of cervical ***-aided systems for cancerous cell detection need to be developed using deep learning(DL)*** study introduces an intelligent deep convolutional neural network for cervical cancer detection and classification(IDCNN-CDC)model using biomedical pap smear *** proposed IDCNN-CDC model involves four major processes such as preprocessing,segmentation,feature extraction,and ***,the Gaussian filter(GF)technique is applied to enhance data through noise removal process in the Pap smear *** Tsallis entropy technique with the dragonfly optimization(TE-DFO)algorithm determines the segmentation of an image to identify the diseased portions *** cell images are fed into the DL based SqueezeNet model to extract deeplearned ***,the extracted features fromSqueezeNet are applied to the weighted extreme learning machine(ELM)classification model to detect and classify the cervix *** experimental validation,the Herlev database is *** database was developed at Herlev University Hospital(Denmark).The experimental outcomes make sure that higher performance of the proposed technique interms of sensitivity,specificity,accuracy,and F-Score.

关键词： Biomedical images deep learning cervical cancer pap smear images computer aided diagnosis herlev database

Interfacial charge transfer and photocatalytic activity in a reverse designed Bi_(2)O_(3)/TiO_(2)core-shell

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Frontiers in Energy 2021年第3期15卷 732-743页

作者： Sabina Ait abdelkader Zhenpeng CUI Abdelghani LAACHACHI Christophe COLBEAU-JUSTIN mohamed Nawfal GHAZZAL UniversitéParis-Saclay UMR 8000CNRSInstitut de Chimie PhysiqueOrsay 91405France Materials Research and Technology Department(MRT) Luxembourg Institute of Science and Technology(LIST)Käerjeng 4940Luxembourg

In this study,the electronic and photocatalytic properties of core-shell heterojunctions photocatalysts with reversible configuration of TiO_(2)and Bi_(2)O_(3)layers were *** core-shell nanostructure,obtained by efficient control of the sol-gel polymerization and impregnation method of variable precursors of semiconductors,makes it possible to study selectively the role of the interfacial charge transfer in each *** morphological,optical,and chemical composition of the core-shell nanostructures were characterized by high-resolution transmission electron microscopy,UV-visible spectroscopy and X-ray photoelectron *** results show the formation of homogenous TiO_(2)anatase and Bi_(2)O_(3)layers with a thickness of around 10 and 8 nm,*** interfacial charge carrier dynamic was tracked using time resolved microwave conductivity and transition photocurrent *** charge transfer,their density,and lifetime were found to rely on the layout layers in the core-shell *** optimal core-shell design,Bi_(2)O_(3)collects holes from TiO_(2),leaving electrons free to react and increase by 5 times the photocatalytic efficiency toward H2 *** study provides new insight into the importance of the design and elaboration of optimal heterojunction based on the photocatalyst system to improve the photocatalytic activity.

关键词： photocatalysis core-shell heterojunction H2 TiO_(2) Bi_(2)O_(3)

Evaluation of phase change materials for a light-weight building in Morocco:Effect of building’s volume,window orientation&infiltration

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Energy and Built Environment 2024年第6期5卷 863-877页

作者： Imad Ait Laasri Niima Es-sakali abdelkader Outzourhit mohamed Oualid Mghazli Laboratory(LaMEE) Faculty of Sciences SemlaliaCadi Ayyad UniversityMarrakeshMorocco Laboratory(LMAID) Rabat National School of MineRabatMorocco Green Energy Park(UM6P/IRESEN) km2 R206BenguerirMorocco ENTPE LTDS UMR CNRS 5513Universitéde LyonCedexVaulx-en-VelinFrance

In this study,we will model a light-weight building made of phase change materials(PCMs)to analyze the impact of the building volume,window orientation,and air infiltration on the PCM *** is done by calculating the energy savings attained by the use of PCM across all of ***’ll use the commercial Rubitherm panels with RT28HC as a phase change material in this ***,the EnergyPlus simulation engine is chosen to perform the *** impact of building volumes is also evaluated on the PCM activation for light-weight square buildings with different side lengths of 10 m,9 m,8 m,and 7 ***,we looked at how well the PCM performed in terms of energy savings and thermal regulation at different window orientation placements(south,north,west,and east)and various air infiltration rates(0.5,1,1.5,and 3 ACH).This paper’s primary objective is to determine the energy savings for the PCM-enhanced building in Morocco,as well as the effect of building volume,window orientation,and infiltration on the PCM capabilities for stabilizing the indoor room *** results show good indoor temperature stabilization during the summer,for the light-weight square building with a south-facing window and no air *** configuration was able to achieve a total fluctuation reduction of 1303.3℃for the 10 m building in a semi-arid ***,a high energy savings percentage of 69.56%was achieved for the PCM-enhanced building with the south-oriented window and air infiltration of 0.5 air change per hour.

关键词： Building energy efficiency Phase change materials Passive thermal regulation

Geochemical characterization of the salinity of irrigated soils in arid regions(Biskra, SE Algeria)

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Acta Geochimica 2021年第2期40卷 234-250页

作者： mohamed Amine Abdennour abdelkader Douaoui Jesus Barrena Manuel Pulido Abdelhamid Bradai Amel Bennacer Chiara Piccini Alberto Alfonso-Torreno Laboratory of Ecosystem Diversity and Agricultural Production System Dynamics in Arid Zones(DEDSPAZA) Mohamed Khider University07000 BiskraAlgeria Laboratory of Crop Production and Sustainable Valorization of Natural Resources Djilali Bounaama University44225 Khemis MilianaAlgeria GeoEnvironmental Research Group University of Extremadura10071 CaceresSpain Laboratory of Water and Environment Hassiba Ben Bouali University02180 ChiefAlgeria Laboratory of Valorization and Conservation of Biological Resources Faculty of SciencesMohamed Bougara University35000 BoumerdesAlgeria Research Centre for Agriculture and Environment Council for Agricultural Research and EconomicsVia della Navicella 2-400184 RomeItaly

The agriculture in Biskra,southeastern Algeria,is based on traditional practices and characterized by small irrigated *** the last decades,the increasing demand in water as well as the scarcity of rainfall has forced many farmers to use groundwater of low quality to maintain the profitability of their ***,this practice seems to be the main harmful factor for soil quality in the region since it is responsible for the salinization of the irrigated *** to assess the impact of this phenomenon,the soils of the irrigated perimeter of El Ghrous-a representative rural community located in the west of Biskra-have been analyzed.A set of 82 soil samples was collected from top and subsoil(0-15 and15-35 cm respectively),on which the following physicochemical analyzes were performed:Ca^(2+),Mg^(2+),K^(+),Na^(+),Cl^(-),SO_(4)^(2-),HCO_(3)^(-),NO_(3)^(-),pH,electrical conductivity(EC)and sodium adsorption ratio.A Principal Component Analysis was performed to individuate the geochemical processes that influenced significantly the evolution of soil salinity and its *** results showed a calcium sulfate(CaSO_(4))facies with a high risk of salinity and a low to medium risk of *** calcite residual alkalinity and generalized residual alkalinity decreased as the solutions became more *** of the samples were oversaturated in carbonate minerals(aragonite,calcite,and dolomite)and under saturated in evaporitic minerals(anhydrite,gypsum,and halite).Finally,two multiple linear regressions(using cations and anions as independent variables)have been proposed to quantify soil *** equations,with an accuracy of 85%,can represent a time and money-saving tool for managers and farmers to estimate the EC,in comparison to the traditional estimation methods.

关键词： Electrical conductivity Cations Anions Soil quality Saturation index PHREEQC

Functional and anatomical evaluation of the effect of nepafenac in prevention of macular edema after phacoemulsification in diabetic patients

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International Journal of Ophthalmology(English edition) 2019年第3期12卷 387-392页

作者： Tharwat Mokbel Sameh Saleh Mona abdelkader Sherief E.El-khouly Waleed Abou Samra mohamed Mamdouh Mansoura Ophthlmic Center Faculty of Medicine Mansoura University

AIM: To evaluate the effect of prophylactic administration of nepafenac in prevention of macular edema occurring in diabetic patients after phacoemulsification and to investigate the correlation between optical coherence tomography(OCT) foveal thickness and multifocal electroretinogram(MF-ERG) ***: The study included two groups. Group 1 included 50 diabetic patients with senile cataract(50 eyes, 30 females, 20 males, aged 55±7 y) received nepafenac 0.1% eye drop. Group 2 included another 50 diabetic patients with senile cataract(50 eyes, 22 female, 28 males, aged 53.8±8 y) did not receive nepafenac. All patients were followed up for 3 mo postoperatively. OCT and MF-ERG were done preoperative and at 1 wk, 1, 2 and 3 ***: The mean foveal thickness was statistically significantly lower in Group 1. Five eyes in Group 2 developed clinical cystoid macular oedema(CMO)(10%), and no patients in Group 1 developed central macular thickening more than 50 μm. There were insignificant differences in MF-ERG amplitudes and latencies between the two groups except in the five eyes that developed CMO, there statistically significant reduction of MF-ERG amplitude with increase in foveal thickness. CONCLUSION: Perioperative nepafenac reduces the incidence of CMO following uncomplicated phacoemulsification significantly. Nepafenac has no side effects.

关键词： nepafenac macular edema cataract surgery diabetes optical coherence tomography multifocal electroretinogram

Hepatitis C virus-mediated angiogenesis:Molecular mechanisms and therapeutic strategies

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World Journal of Gastroenterology 2014年第42期20卷 15467-15475页

作者： mohamed Hassan Denis Selimovic Abdelouahid El-Khattouti Martine Soell Hanan Ghozlan Youssef Haikel Ola abdelkader Mosaad Megahed Cancer Institute University of Mississippi Medical Center Institut National de la Santé et de la Recherché Médicale S 1121 Hospitals of Hautepierre Dental Faculty University of Strasbourg Department of Operative Dentistry and Endodontics Hospitals of Hautepierre Dental Faculty University of Strasbourg Department of Periodontology Hospitals of Hautepierre Dental Faculty University of Strasbourg Department of Microbiology Faculty of Science Medical research Institute University of Alexandria Department of Microbiology Medical research Institute University of Alexandria Clinic of Dermatology University Hospital of Aachen

Angiogenesis is an essential process for organ growth and repair. Thus, an imbalance in this process can lead to several diseases including malignancy. Angiogenesis is a critical step in vascular remodeling, tissue damage and wound healing besides being required for invasive tumor growth and metastasis. Because angiogenesis sets an important point in the control of tumor progression, its inhibition is considered a valuable therapeutic approach for tumor treatment. Chronic liver disease including hepatitis C virus(HCV) infection is one of the main cause for the development of hepatic angiogenesis and thereby plays a critical role in the modulation of hepatic angiogenesis that finally leads to hepatocellular carcinoma progression and invasion. Thus, understanding of the molecular mechanisms of HCV-mediated hepatic angiogenesis will help design a therapeutic protocol for the intervention of HCV-mediated angiogenesis and subsequently its outcome. In this review, we will focus on the molecular mechanisms of HCV-mediated hepatic angiogenesis and the related signaling pathways that can be target for current and under development therapeutic approaches.

关键词： Hepatitis C virus Hepatocellular carcinoma Angiogenesis Signaling pathway Therapy

Build Bridge for Tunisians to Read Chinese Literature

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China News Release 2024年第4期 19-20页

作者： Samah mohamed abdelkader the Higher Institute of Languages of Tunis at the University of Carthage the Oriental Knowledge Publishing Company in Tunisia

China boasts a lengthy history and a diversified *** a Sinologist and translator,my relationship with China runs rather *** 1999,after graduating from high school,I officially began learning Chinese with my father’s encouragement and *** the very beginning,I found this language,with unique features and charm,to be completely different from the Western languages I had learned *** my studies progressed,I developed a strong interest in it and experienced a great sense of satisfaction and accomplishment from it.

关键词： translator accomplishment features

Hepatitis C virus-related hepatocellular carcinoma:An insight into molecular mechanisms and therapeutic strategies

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World Journal of Hepatology 2012年第12期4卷 342-355页

作者： Denis Selimovic Abdelouahid El-Khattouti Hanan Ghozlan Youssef Haikel Ola abdelkader mohamed Hassan Institut National de la Santé et de la Recherche Médicale U 97767000 StrasbourgFrance Department of Operative Dentistry and Endodontics Dental FacultyUniversity of Strasbourg67000 StrasbourgFrance Cancer Institute University of Mississippi Medical CenterJacksonMS 39216United States Deparment of Microbiology Faculty of ScienceUniversity of AlexandriaAlexandria 4285455Egypt Department of Microbiology Medical Research InstituteUniversity of AlexandriaAlexandria 4285455Egypt

Hepatitis C virus(HCV) infects more than 170 million people worldwide,and thereby becomes a series global health *** infection with HCV is considered one of the major causes of end-stage liver disease including cirrhosis and hepatocellular *** the multiple functions of the HCV proteins and their impacts on the modulation of the intracellular signaling transduction processes,the drive of carcinogenesis during the infection with HCV,is thought to result from the interactions of viral proteins with host cell ***,the induction of mutator phenotype,in liver,by the expression of HCV proteins provides a key mechanism for the development of HCV-associated hepatocellular carcinoma(HCC).HCC is considered one of the most common malignancies worldwide with increasing incidence during the past *** many countries,the trend of HCC is attributed to several liver diseases including HCV ***,the development of HCC is very complicated and results mainly from the imbalance between tumor suppressor genes and oncogenes,as well as from the alteration of cellular factors leading to a genomic *** the poor prognosis of HCC patients,this type of tumor is quite resistance to the available ***,understanding the molecular mechanisms,which are implicated in the development of HCC during the course of HCV infection,may help to design a general therapeutic protocol for the treatment and/or the prevention of this *** review summarizes the current knowledge of the molecular mechanisms,which are involved in the development of HCV-associated HCC and the possible therapeutic strategies.

关键词： Hepatitis C virus Hepatocellular carcinoma Cirrhosis Fibrosis Inflammation Carcinogenesis