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380篇 您的检索式:作者名="Khader"
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1Computational Machine Learning Representation for the Flexoelectricity Effect in Truncated Pyramid Structures显示文摘In this study,machine learning representation is introduced to evaluate the flexoelectricity effect in truncated pyramid nanostructure under compression.A Non-Uniform Rational B-spline(NURBS)based IGA formulation is employed to model the flexoelectricity.We investigate 2D system with an isotropic linear elastic material under plane strain conditions discretized by 45×30 grid of B-spline elements.Six input parameters are selected to construct a deep neural network(DNN)model.They are the Young's modulus,two dielectric permittivity constants,the longitudinal and transversal flexoelectric coefficients and the order of the shape function.The outputs of interest are the strain in the stress direction and the electric potential due flexoelectricity.The dataset are generated from the forward analysis of the flexoelectric model.80%of the dataset is used for training purpose while the remaining is used for validation by checking the mean squared error.In addition to the input and output layers,the developed DNN model is composed of four hidden layers.The results showed high predictions capabilities of the proposed method with much lower computational time in comparison to the numerical model.Khader M.Hamdia Hamid Ghasemi Xiaoying Zhuang Naif Alajlan Timon Rabczuk 2019Computers, Materials & Continua2019,,4:5
2Larvicidal potential of selected indigenous lichens against three mosquito species–Culex quinquefasciatus, Aedes aegypti and Anopheles stephensi显示文摘Objective:Mosquitoes are the major transmitting vectors of serious human diseases,causing millions of deaths every year with undesirable effects,including toxicity to non-target organisms.Some plants with insecticidal properties have been used in recent years for the control of a variety of pest insects and vectors.In the quest for alternative natural biological control agents against mosquito larvae lichens were selected.Method:Larvicidal activity was assessed with methanolic extracts of Parmotrema reticulatum,Parmotrema kamatti,Parmotrema tinctorum,Parmelia erumpens,Leptogium papilosum,and Roccella montagnei against Aedes aegypti,Anopheles stephensi,and Culex quinquefasciatus.The standard WHO protocols with minor modifications were adopted and the bioassay was evaluated at the concentrations of 100–500μg/m L for each lichen.Since all the lichen extracts showed complete mortality against C.quinquefasciatus in100μg/m L,the concentrations were decreased to 100,50,25,12.5,and 6.25μg/m L for C.quinquefasciatus.Larval mortality was observed for 24 h after treatment.Results:All the lichen extracts exhibited activity against third instar larvae of A.aegypti and A.stephensi at 100μg/m L,and 100%mortality was observed against the vector C.quinquefasciatus at 100μg/m L.The highest larvicidal activity was found with L.papilosum against A.aegypti(81.127μg/m L)and A.stephensi(89.10μg/m L).Similarly,P.tinctorum and R.montagnei when tested against C.quinquefasciatus with minimum concentration<100μg/m L exhibited significant activity withof 5.32and 6.97μg/m L.Conclusion:The bioassay results revealed larvicidal potential of lichens especially against C.quinquefasciatus with high mortality even at lower concentration.Hence,lichens can be used as an ideal sustainable approach for the control of lymphatic filariasis caused by vector C.quinquefasciatus.Syed Zameer Ahmed Khader Sidhra Syed Zameer Ahmed Kisore Perundurai Venkatesh Kamaraj Chinnaperumal Sanjeeva Nayaka 2018Chinese Herbal Medicines2018,10,2:2
3Celiac disease in patients with presumed irritable bowel syndrome:A case-finding study显示文摘AIM:To estimate the prevalence of celiac disease(CD) in adult patients with presumed irritable bowel syndrome(IBS) .METHODS:Between March 2005 and December 2008,742 consecutive patients(293 male,median age 43 years,range 18-69 years) fulfilling the Rome Ⅱ criteria for IBS were prospectively enrolled in the study.IBS was diagnosed via self-completed Rome Ⅱ modular questionnaires.Anti-tissue transglutaminase(anti-tTG) serology was checked to initially recognize possible CD cases.Patients with a positive test were offered endoscopic duodenal biopsy to confirm the diagnosis of CD.RESULTS:Thirty two patients(15 male,median age 41 years,range 19-59 years) were found to have organic diseases other than CD.Twenty four patients tested positive for anti-tTG antibodies,and duodenal biopsies confirmed the diagnosis in all of them.Thus,in this patient population with presumed IBS,3.23% actually had CD.CONCLUSION:CD is common in patients with presumed IBS.Routine screening for CD in patients with symptoms of IBS is recommended.Khaled Ali Jadallah Yousef Saleh Khader 2009World Journal of Gastroenterology2009,15,42:2
4Structural damage assessment criteria for reinforced concrete buildings by using a Fuzzy Analytic Hierarchy process显示文摘Reinforced concrete structures are often exposed to many types of damages and deteriorations due to different causes and exposure conditions during their life cycle.Assessment of such structures is inherently subjected to uncertainty and ambiguity,where subjective opinion and incomplete numeric data are unavoidable.In the damage assessment process,estimating the importance of assessment criteria is an important field in itself,and depends heavily on the experience and expertise of experts.The aim of this study is to present a fuzzy-based assessment model,which estimates the importance of structural assessment criteria for concrete buildings.The work aims also at studying,identifying,and prioritizing assessment criteria.These assessment criteria are based on close visual inspections and simple measurements that do not require special testing or long-term investigation.The main assessment criteria include the state of building history,environmental conditions,structural capacity,durability,and professional involvement in construction.Each of them has two levels of sub-criteria.The criteria weights are obtained based on the opinions of experts using the Fuzzy Analytic Hierarchy Process(FAHP)method.The application of the FAHP method showed that the most important criteria is the structural capacity with a weighting factor of 50.1%,followed by the environmental condition as second,with a weighting factor of 22.5%.Khader M.Hamdia Mohammed Arafa Mamoun Alqedra 2018Underground Space2018,3,3:2
5A numerical study by using the Chebyshev collocation met hod for a problem of biological invasion: Fractional Fisher equation A numerical study by using the Chebyshev collocation met hod for a problem of biological invasion: Fractional Fisher equation显示文摘In this paper, an efficient numerical method is introduced for solving the fractional (Caputo sense) Fisher equation. We use the spectral collocation method which is based upon Chebyshev approximations. The properties of Chebyshev polynomials of the third kind are used to reduce the proposed problem to a system of ODEs, which is solved by the finite difference method (FDM). Some theorems about the convergence analysis are stated and proved. A numerical simulation is given and the results are compared with the exact solution.Mohamed M. Khader Khaled M. Saad 2018International Journal of Biomathematics2018,11,8:2
6The role of Thl7 cytokines in primary mucosal immunity 显示文摘Kolls JK Khader SA 2010Cytokine Growth Factor Rev2010,21,6:1
7Interleukin 12p40 is required for dendritic cell migration and T cell priming af- ter Mycobacterium tuberculosis infection 显示文摘Khader S Partida Sanchez S Bell G 2006J Exp Med2006,203,7:1
8Lack of association between periodontal parameters and preeclampsia显示文摘Khader YS Jibreal M AI-Omiri M 2006J Periodontol2006,77,10:1
9Cutting edge:IFN-gamma refulates the induction and expansion of IL-17-producing CD4 T cells during mycobacterial infection显示文摘Cruz A Khader SA Torrado KE 2006J Immunol2006,177,3:1
10Th17 cells at the cross- roads of innate and adaptive immunity against infectious diseases at the mucosa显示文摘Khader SA Gaffen SL Kolls JK 2009Mucosal Immunol2009,2,5:1
111L-23 and IL-17 in the estab-lishment of protective pulmonary CD4 + T cell responses aftervaccination and during Mycobacterium tuberculosis challenge显示文摘Khader SA Bell GK Pearl JE 2007Nat Immunol2007,8,4:1
12Intraparticle diffusion of a basic dye during adsorption onto sphagnum peat显示文摘Allen S J McKay G Khader K Y H 1989Environmental Pollution1989,56,1:1
13Case note:retroperitonealnonfunctioning paraganglioma显示文摘Hasbi S E1 Khader A El Fahssi M 2010Can J Sur2010,53,:1
14Periodontal diseases and the risk of coronary heart and cerebrovascular diseases:a meta analysis显示文摘Khader Y S Albashaireh Z S Alomari M A 2004J Periodontal2004,75,8:1
15The association between periodontal disease,physical activity and healthy diet among adults in Jordan显示文摘Bawadi HA Khader YS Haroun TF 0,,01:1
16Self-reported needle-stick injuries among dentists in north Jordan显示文摘Khader Y Burgan S Amarin Z 2009East Mediterr Health J2009,15,1:1
17Periodontal disease and the risk of coronary heart and cerebrovascular disease:a meta-analysis显示文摘Khader YS Albashaireh ZS Alomari MA 2004J Periodontol2004,75,8:1
18IL-23 and IL-17 in the establishment of protective pulmonary CD4 + T cell responses after vaccination and during Mycobacterium tuberculosis challenge显示文摘Khader SA Bell GK Pearl JE 2007Nat Immunol2007,8,4:1
19Effect of GA3 as a postharvest treatment of mango fruit on ripening, analysis and perxidase activity and quality during storage显示文摘 Singh B P Khan S A 1998Scientific HortScience1998,8,6:1
20Intraparticle diffu- sion of a basic dye during adsorption onto sphagnum peat 显示文摘Allen S J McKay G Khader K Y H 1989Environ Pollut1989,56,:1
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