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Some Advances in Applications of Lattice Boltzmann Method for Complex Thermal Flows

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Advances in Applied Mathematics and Mechanics 2010年第5期2卷 587-608页

作者： Ridha Djebali habib Sammouda mohammed El Ganaoui University of Tunis El-Manar FS of TunisDepartment of PhysicsLETTM1060 TunisTunisia CNRS/SPCTS UMR 6638FST of LimogesDepartment of Physics87060 LimogesFrance

Over the past two decades,there have been enormous advances in lattice Boltzmann(LB)numerical simulation and *** lattice Boltzmann method has become a practical and promising tool for many fluid problems.A majority of recent studies have relied on numerical computations of isothermal ***,much less efforts have been devoted to complex thermal flows,such as flows in porous media subjected to external magnetic force,flows with temperature-dependent *** this paper,an overview is made based on some accomplishments in these numerical *** with the paper’s sections,the state-of-the-art trend and the LBM advances in modelling and in computational aspects for specific classes of problems of major interest will be fully touched *** remarks are given and the axis of our future studies will be traced.

关键词： LB method Bifurcations and instability porous media flows plasma jets

Intestinal carriage of methicillin resistant Staphylococcus aureus and extended-spectrum β-Lactamase-producing Enterobacteriacae in hospitalized and nonhospitalized patients and their clinical implications

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Asian Pacific Journal of Tropical Medicine 2009年第3期2卷 41-45页

作者： Hanan Ahmed habib Babay Ali mohammed Somily Department of Pathology Microbiology Unit King Khalid University HospitalRiyadhSaudi Arabia

Objective:To determine the clinical implication of and intestinal carriage with methicillin resistant Staphylococcus aureus(MRSA) and extended spectrumβ-lactamase(ESBL)-producing ***: A total of 180 stool specimens were screened for MRSA and ESBL-producing *** of ESBL- producing Enterobacteriacae was done by MicroScan Walk Away 96 system(Dade Behring Inc.,West Sacramento,CA 95691,USA ) and confirmation by double-disc synergy *** was identified by disc diffusion using 30μg cefoxitin disc and the ***:The rate of fecal MRSA carriage was 7.8% (14/180),35.7%(5 /14) were recovered from surgical *** patients(21,4%) had MRSA recovered from other body sites,and 2(14.2%) had in addition ESBL -producing Escherichia coli(***) and Klebsiella pneumoniae(***) ***(28.5%) patients with MRSA fical carriage died. MRSA fecal carriage was recovered from both inpatients and ***(2.2%) cases carried ESBL-producing Enterobacteriacae in ***(75%) were from intensive care unit(ICU).One patient had both ESBL-producing *** and *** from stool as well as *** from tracheal *** ICU patients with fecal ESBL ***:Fecal screening for MRSA and ESBL of all patients at high risk admitted to different hospital wards and ICUs and implementing infection control measures were recommended.

关键词： Intestinal carriage Methicillin resistant Staphylococcus aureus Extended spectrumβ-lactamase Enterobacteriacae

Antihyperglycaemic activity of ethylacetate extract of Chlorophytum alismifolium in type 2 diabetes:The involvement of peroxisome proliferator-activated receptor-γand dipeptidyl peptidase-4

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Journal of Integrative Medicine 2021年第1期19卷 78-84页

作者： Abdulhakim Abubakar abdullahi Balarabe Nazifi Idris mohammed Maje Yusuf Tanko Joseph Akpojo Anuka Ezzeldin Mukthar Abdurahman Department of Pharmacology and Therapeutics Ahmadu Bello UniversityZaria PMB-1044Nigeria Department of Pharmacology and TherapeuticsBayero UniversityKano PMB-3011Nigeria Department of Human PhysiologyAhmadu Bello UniversityZaria PMB-1044Nigeria Department of Pharmacognosy and Drug DevelopmentAhmadu Bello UniversityZaria PMB-1044Nigeria

Objective:This research is to investigate the antihyperglycaemic activity and the underlying mechanisms of action of the ethylacetate extract of Chlorophytum alismifolium(EACA)tubers in a type 2 diabetes ***:The tubers were processed and sequentially extracted in hexane followed by ethylacetate,using a Soxhlet apparatus,and subjected to gas chromatography-mass spectrometry(GC–MS).The acute toxicity of EACA was investigated in albino Wistar *** antihyperglycaemic study was carried out using high-fat diet(pelletized diet and margarine in the ratio of 10:1 and 20%fructose solution)and streptozotocin-induced hyperglycaemic Wistar *** effects of the extract(150,300 and 600 mg/kg)on blood glucose level,insulin,peroxisome proliferator-activated receptor-c(PPAR-c)and dipeptidyl peptidase-4(DPP-4)were evaluated using enzyme-linked immunosorbent ***:The oral median lethal dose in Wistar rats was estimated to be>5000 mg/*** with EACA at all doses significantly reduced the fasting blood glucose levels,compared to the hyperglycaemic control,and over *** of EACA increased the serum insulin and PPAR-c levels while decreasing DPP-4 ***–MS analysis revealed the presence of 13 compounds,with isothiazole and isoxazolidine covering total area of 24.6%and 22.69%,***:The findings from this study showed that EACA has important compounds with beneficial effect in type 2 diabetes and acts by increasing insulin secretion and PPAR-c level and decreasing DPP-4 activity.

关键词： Chlorophytum alismifolium Diabetes mellitus Gas chromatography-mass spectrometry Insulin Peroxisome proliferator-activated receptor-c Dipeptidyl-peptidase 4

Floyd-Warshall Algorithm Based on Picture Fuzzy Information

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Computer Modeling in Engineering & Sciences 2023年第9期136卷 2873-2894页

作者： Shaista habib Aqsa Majeed Muhammad Akram mohammed M.Ali Al-Shamiri School of Systems and Technology University of Management and TechnologyLahorePakistan Department of Mathematics University of the PunjabNew CampusLahorePakistan Department of Mathematics Faculty of Science and ArtsMahayl AssirKing Khalid UniversityAbhaSaudi Arabia Department of Mathematics and Computer Faculty of ScienceIbb UniversityIbbYemen

The Floyd-Warshall algorithm is frequently used to determine the shortest path between any pair of *** works well for crisp weights,but the problem arises when weights are vague and *** us take an example of computer networks,where the chosen path might no longer be appropriate due to rapid changes in network *** optimal path from among all possible courses is chosen in computer networks based on a variety of *** this paper,we design a new variant of the Floyd-Warshall algorithm that identifies an All-Pair Shortest Path(APSP)in an uncertain situation of a *** the proposed methodology,multiple criteria and theirmutual associationmay involve the selection of any suitable path between any two node points,and the values of these criteria may change due to an uncertain *** use trapezoidal picture fuzzy addition,score,and accuracy functions to find *** compute the time complexity of this algorithm and contrast it with the traditional Floyd-Warshall algorithm and fuzzy Floyd-Warshall algorithm.

关键词： Trapezoidal picture fuzzy number score function accuracy function shortest path problem Floyd-Warshall algorithm

A new correlation-based approach for ensemble selection in random forests

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International Journal of Intelligent Computing and Cybernetics 2021年第2期14卷 251-268页

作者： Mostafa El habib Daho Nesma Settouti mohammed El Amine Bechar Amina Boublenza mohammed Amine Chikh Biomedical Engineering Laboratory University of TlemcenTlemcenAlgeria

Purpose-Ensemble methods have been widely used in the field of pattern recognition due to the difficulty offinding a single classifier that performs well on a wide variety of *** the effectiveness of thesetechniques,studies have shown that ensemble methods generate a large number of hypotheses and thatcontain redundant classifiers in most *** works proposed in the state of the art attempt to reduce allhypotheses without affecting ***/methodology/approach-In this work,the authors are proposing a pruning method that takes intoconsideration the correlation between classifiers/classes and each classifier with the rest of the *** authorshave used the random forest algorithm as trees-based ensemble classifiers and the pruning was made by atechnique inspired by the CFS(correlation feature selection)***-The proposed method CES(correlation-based Ensemble Selection)was evaluated onten datasets from the UCI machine learning repository,and the performances were compared to sixensemble pruning *** results showed that our proposed pruning method selects a smallensemble in a smaller amount of time while improving classification rates compared to the ***/value-CES is a new ordering-based method that uses the CFS *** selects,in a shorttime,a small sub-ensemble that outperforms results obtained from the whole forest and the other state-of-thearttechniques used in this study.

关键词： Ensemble pruning Random forest Tree selection Correlation CFS CES

Characterization of cobalt ferrite-supported activated carbon for removal of chromium and lead ions from tannery wastewater via adsorption equilibrium

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Water Science and Engineering 2020年第3期13卷 202-213页

作者： Muibat Diekola Yahya Kehinde Shola Obayomi mohammed bello Abdulkadir Yahaya Ahmed Iyaka Adeola Grace Olugbenga Department of Chemical Engineering Federal University of TechnologyMinnaP.M.B.65Nigeria Department of Chemical Engineering Landmark UniversityOmu-AranP.M.B.1001Nigeria Department of Chemistry Federal University of TechnologyMinnaP.M.B.65Nigeria

In this experiment,cobalt ferrite-supported activated carbon(CF-AC)was developed and characterized via the wet impregnation method for the removal of Cr and Pb(II)ions from tannery *** adsorption was carried out to evaluate the effect of experimental operating conditions(pH of solution,contact time,adsorbent dose,and temperature),and the removal efficiencies of Cr and Pb(II)ions by the developed adsorbents were calculated and recorded for all experimental *** variables were estimated and reported as removal efficiencies of 98.2%for Cr and 96.4%for Pb(II)ions at the optimal conditions of 5,0.8 g,80 min,and 333 K for pH,adsorbent dose,contact time,and temperature,*** equilibrium for the sorption of Cr and Pb(II)ions was studied using four widely used isotherm models(the Langmuir,Freundlich,Dubinin-Radushkevich,and Temkin isotherm models).It was found that the Freundlich isotherm model fit better with the coefficient of determination(R2)of 0.9484 and a small sum of square error of *** maximum adsorption capacities(Qm)of Pb(II)and Cr adsorbed onto CF-AC were determined to be 6.27 and 23.6 mg/g,*** adsorption process conformed well to pseudo-second order kinetics as revealed by the high R2 values obtained for both *** thermodynamic parameters showed that adsorption of Cr and Pb(II)ions onto CF-AC was spontaneous,feasible,and endothermic under the studied *** mean adsorption energy(E)values revealed that the adsorption mechanism of Cr and Pb(II)by CF-AC is physical in *** results of the study showed that adsorbent developed from CF-AC can be efficiently used as an environmentally friendly alternative adsorbent,for removal of Cr and Pb(II)ions in tannery wastewater.

关键词： Almond husk Cobalt ferrite Equilibrium study Heavy metals Adsorption Removal efficiency

Numerical investigation of modal and fatigue performance of a horizontal axis tidal current turbine using fluid-structure interaction

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Journal of Ocean Engineering and Science 2019年第4期4卷 328-337页

作者： habib Ullah Muzamil Hussain Naseem Abbas Hassaan Ahmad mohammed Amer Muhammad Noman Faculty of Engineering and Technology University of LahoreLahore 54000Pakistan Department of Mechanical Engineering NFC Institute of Engineering and TechnologyMultan 60000Pakistan School of Mechanical Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Mechanical Engineering National Chiao Tung UniversityHsinchuTaiwan

The tidal power has the potential to play a vital role in a sustainable energy *** main objective of this paper is to investigate the performance and fatigue life of tidal current turbine(TCT)using fluid structure interaction(FSI)*** performance of TCT was predicted using Ansys *** performance curve,pressure distribution on the blade,and velocity streamline were visualized for eight repetitive analyses at different tip speed *** hydrodynamic load calculated from CFD analysis was transferred to FEA model for investigation of the structural response of *** analysis was performed to examine the mode shapes and natural frequencies of *** fatigue analysis were performed and number of cycles and safety factor at different equivalent alternating stresses were *** results of the simulation confirm that the turbine has a maximum value of the coefficient of performance atλ=5,the turbine operating frequency is not close to its natural frequency,and it is safe under the applied fatigue loads with a high factor of safety.

关键词： Tidal current turbine Fluid-structure interaction Fatigue performance Computational Fluid Dynamic Blade element

Dehydration risk factors and outcomes in older people in rural areas

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Frontiers of Nursing 2022年第4期9卷 395-403页

作者： Mostafa Shaban Nagat habib Inas Helmy Huda Hamdy mohammed Gerontological Nursing Department Faculty of NursingCairo UniversityCairo 12613Egypt Community Health Nursing-Faculty of Nursing Cairo UniversityCairo 12613Egypt Maternal&Newborn Health Nursing Faculty of NursingHelwan UniversityCairo 11795Egypt

Objective:To determine the risk factors for dehydration in elderly people in one of Elbehira Governorate’s ***:A descriptive correlational design was utilized in this *** study was conducted at Elnemaria village,Markaz Abo Elmatamir,Elbehira Governorate,*** were collected using 3 tools:a structured interviewing questionnaire,a dehydration knowledge questionnaire,and a dehydration risk appraisal ***:The study found that 29.5%of the par ticipants were aged between 65 and *** constituted 51%of the study par *** majority of the study participants regularly took anti-acids,anti-inflammatory drugs,and *** the elderlies comprising the respondents,40%had a low level of knowledge regarding *** than half of the study subjects were at moderate risk for ***:The study showed that half of the par ticipants had diabetes and a medium level of information about *** study also showed in general that the elderly in the village are exposed to a moderate dehydration rate,and there is also a strong relationship between taking different types of medication and the occurrence of dehydration.

关键词： clinical signs dehydration elderly functional signs physiological signs

Impact of COVID-19 on the Practice of Otorhinolaryngology in Nigeria

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International Journal of Otolaryngology and Head & Neck Surgery 2021年第4期10卷 300-312页

作者： Nurudeen Adebola Shofoluwe Jamila Lawal abdullahi Musa Kirfi mohammed bello Fufore Olushola Abdulrahman Afolabi Department of Otorhinolaryngology Ahmadu Bello University & Ahmadu Bello University Teaching Hospital Zaria Nigeria Division of Otorhinolaryngology Department of Surgery Kaduna State University and Barau Dikko Teaching Hospital Kaduna Nigeria Department of Otorhinolaryngology Abubakar Tafawa Balewa University Teaching Hospital Bauchi Nigeria Department of Otorhinolaryngology Federal Medical Centre Yola Nigeria Department of Otorhinolaryngology University of Ilorin Teaching Hospital Ilorin Nigeria

Background: The 2019 novel corona virus disease (COVID-19) pandemic broke out in Wuhan, Hubei province in China in December 2019. Available research so far showed that Otolaryngologists had an elevated risk of exposure to SARS-CoV-2 due to the high viral load in the respiratory tract, which is the primary area of examination and instrumentation. We aimed to present our findings on the impact of this pandemic on Otolaryngology practice in Nigeria. Materials and Methods: This study was conducted online in September, 2020 amongst otolaryngologists in secondary and tertiary health centers across Nigeria using the survey monkey. Analysis was done using SPSS version 20. Results: A total of 102 ORL practitioners in Nigeria were assessed in this study. The mean age of the respondents was 42.4 ± 7.9 years;majority (54.9%) were Consultants and their duration of ORL practice ranged between 1 - 37 years. All the respondents felt being an ENT Surgeon exposes them to higher risk of contracting COVID-19 in their practice while 93% of them felt unsafe to perform throat examination during COVID-19 pandemic. Similarly, 74.5% feel unsafe to perform rhinoscopy while 67.7% of the respondents feel unsafe to do anterior rhinoscopy, posterior rhinoscopy and rigid nasal endoscopy. Conclusion: Otolaryngologist is at high risk of being infected with SARS COV-2 as they cope with upper respiratory tract during diagnosis, clinical review, sampling and surgery. The pandemic has affected almost all aspects of Otolaryngologic practice in Nigeria.

关键词： Impact Nigeria Otolaryngologic Practice SARS-CoV-2