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Open Journal of Applied Sciences 2020年第9期10卷 551-560页

作者： Nisreen A. Elthair eltayeb m. mustafa Abdelrahm.n A. Elbadawi Departm.nt of Physics Faculty of Science and Technology Al Neelain University Khartoum Sudan Departm.nt of Physics Faculty of Science Jazan University Jazan KSA Faculty of Basic Studies Future University Khartoum Sudan

In this study, nano ferrite m.terials were produced to replace costive industrial m.terials [1]. Ferrite nanoparticles are the interesting m.terial due to their rich and unique physical and chem.cal properties. They f... 详细信息

In this study, nano ferrite m.terials were produced to replace costive industrial m.terials [1]. Ferrite nanoparticles are the interesting material due to their rich and unique physical and chemical properties. They find applications in catalysis, bio-processing, medicine, magnetic recording, adsorption, devices etc. Using co-participation method, five nano ferrite samples Zn0.5Mg0.5-xLi2xFe2O4 (x = 0.00, 0.10, 0.20, 0.30 and 0.40) were prepared. The electrical and optical properties of the Zn0.5Mg0.5-xLi2xFe2m.ly

关键词： Zn0.5m.0.5-xLi2xFe2O4 Nano Ferrites UV.vis Co-Precipitation Electrical Proper-ties Optical Properties

The Effect of Replacem.nt of Zn ²⁺ Cation with Ni ²⁺ Cation on the Structural Properties of Ba sub>2Zn sub>1–x Ni sub>xWO sub>6 Double Perovskite Oxides (X = 0, 0.25, 0.50, 0.75, 1)

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Journal of m.terials Science and Chem.cal Engineering 2016年第2期4卷 61-70页

作者： Yousif A. Alsabah Abdelrahm.n A. Elbadawi eltayeb m. mustafa m.ham.d A. Siddig Departm.nt of Physics Faculty of Science and Technology Al Neelain University Khartoum Sudan Departm.nt of Physics Faculty of Education and Applied Science Hajjah University Hajjah Yemen Departm.nt of Physics Faculty of Science Al Baha University Al Baha Saudi Arabia

The Ba2Zn1-xNixWO6 double perovskite oxides were synthesized using solid state reaction m.thod. The effect of replacem.nt of Zn2+ with Ni2+ cation on the structural properties was investigated by X-ray diffraction (XRD) at room.tem.erature. From.the X-ray diffraction and by m.ans of standard Rietiveld m.thod, the sam.les showed the sam. cubic crystal structure with (Fm.3m. space group and the crystallite size ranging from.71.91 nm.to 148.71 nm. The unit cell volum. was found to decrease as a result of the replacem.nt, while there was no significant difference in the value of tolerance factor of the sam.les. This is m.y be due to the convergence of ionic radii of Ni2+ and Zn2+ cations. The Fourier Transform.Infrared Spectroscopy (FTIR) was perform.d for the sam.les and the resultant characteristic absorption bands confirm.d the double perovskite structure.

关键词： Double Perovskite XRD FTIR Solid State Reaction m.thod Tolerance Factor

Epidem.ology of schistosom.asis in Gezira area Central Sudan and analysis of cytokine profiles

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Asian Pacific Journal of Tropical m.dicine 2013年第2期6卷 141-147页

作者： Nagla mustafa eltayeb m.awia m.ham.d m.khtar Ahm.d Babiker m.ham.d Departm.nt of Im.unology and Biotechnology Tropical Medicine Research InstituteNational Centre for ResearchKhartoumSudan Departm.nt of Im.unology Institute of Endemic DiseasesUniversity of KhartoumKhartoumSudan National Centre for Research Ministry of Science and TechnologyKhartoumSudan

Objective:To determ.ne and com.are anti-schistosom. IgC,interleukin-10(IL-10) and interferon-γ(IFN-γ)levels in the serum.of patients and endem.c controls and to investigate the epidem.ological situation of Al-Hebaika village in the northern part of Gezira Agricultural Irrigation Schem. in ***:During 2005 survey,serum.were collected from.118 *** eight were parasitological positive(patients),and 50 were negative(endem.c controls).Indirect ELISA was used to m.asure and com.are the levels of im.unoglobulin C(IgC) against Schistsom. m.nsoni(***) soluble worm.antigen(SWA) in the patients and endem.c control groups from.the village and com.ared with 20 healthy non endem.c *** ELJSA was also used to m.asure and com.are IL-10 and IFN-γin the serum.of the selected ***:The overall prevalence of *** was 20.0%and 0.9%in the first and the second surveys respectively,while the intensity of infection was the sam. in the two surveys 1.38[geom.tric m.an egg count(Gm.C)].The overall prevalence of *** infection was 68.5% and 15.4%,while the intensity of infection was 2.75(Gm.C) and 1.70(Gm.C) in the two surveys *** reactivity against SWA showed no significant difference between Schistosom. positive patients and endem.c ***,there were high significant differences between each of these two groups and the non endem.c control group(P= 0,000).Schistosom. patients and exposed controls had significantly higher IL-10 concentration com.ared with non endem.c *** endem.c controls showed significantly higher IFN-γconcentration than patients(P = 0.000).Also there was very significant difference between IFN-γlevels of each of patients endem.c controls and that of the non endem.c controls(P = 0.003).Conclusions:The study concluded that IFN-γhas a role in the natural resistant to schistosom. m.nsoni infection. The prevalence and intensity of *** in the Gezira Irrigation Schem. was greatly red

关键词： Schistosom.asis IgG IL-10 IFN-gam. ELISA

Optim.l Load Balancing in Cloud Environm.nt of Virtual m.chines

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Com.uter System. Science & Engineering 2022年第6期41卷 919-932页

作者： Fuad A.m.Al-Yarim. Sam. Althahabi m.jdy m.ham.ed eltayeb Departm.nt of Com.uter Science King Khalid UniversityMuhayel AseerKingdom of Saudi Arabia Departm.nt of Inform.tion System King Khalid UniversityMuhayel AseerKingdom of Saudi Arabia

Cloud resource scheduling is gaining prom.nence with the increasingtrends of reliance on cloud infrastructure solutions. Num.rous sets of cloudresource scheduling m.dels were evident in the literature. Cloud resource scheduling refers to the distinct set of algorithm. or program. the service providersengage to m.intain the service level allocation for various resources over a virtualenvironm.nt. The m.del proposed in this m.nuscript schedules resources of virtual m.chines under potential volatility aspects, which can be applied for anypriority m.tric chosen by the server adm.nistrators. Also, the m.del can be flexible for any tim. fram.-based analysis of the load factor. The m.del discussed inthis m.nuscript relies on the Bollinger Bands tool for understanding the potentialvolatility aspects of a Virtual m.chine. The experim.ntal study of the m.del com.pared to the contem.orary load balancing m.del called STLB (Starvation Threshold-based Load Balancing) refers to a sim.le and potential m.del that can bem.re pragm.tic for sustainable ways of load balancing.

关键词： Cloud com.uting service level agreem.nts virtual m.chines load balancing scheduling

Diagnosing Breast Cancer Accurately Based on Weighting of HeterogeneousClassification Sub-m.dels

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Com.uter System. Science & Engineering 2022年第9期42卷 1257-1272页

作者： m.jdy m.ham.d eltayeb Eltahir Tarig m.ham.ed Ahm.d Departm.nt of Inform.tion System. College of Science&Arts at MahayilKing Khalid UniversityMuhayel Aseer62529Kingdom of Saudi Arabia Departm.nt of Inform.tion Technology Faculty of Computing and Information TechnologyKing Abdul-Aziz UniversityJeddah21589Kingdom of Saudi Arabia Departm.nt of Com.uter Sciences Faculty of Mathematical Sciences and InformaticsUniversity of KhartoumKhartoum11115Sudan

In developed and developing countries, breast cancer is one of the leading form. of cancer affecting wom.n alike. As a consequence of growing lifeexpectancy, increasing urbanization and em.racing Western lifestyles, the highprevalence of this cancer is noted in the developed world. This paper aim. todevelop a novel m.del that diagnoses Breast Cancer by using heterogeneous datasets. The m.del can work as a strong decision support system.to help doctors tom.ke the right decision in diagnosing breast cancer patients. The proposed m.delis based on three datasets to develop three sub-m.dels. Each sub-m.del worksindependently. The final diagnosis decision is taken by the three sub-m.dels independently. The power of the m.del com.s from.the diversity checks of patientsand this reduces the risk of wrong diagnosing. The m.del has been developedby conducting intensive experim.nts. Several classification algorithm. were usedto select the best one in each sub-m.del. As the final results, the sub-m.delaccuracies were 72%, 74% and 97%.

关键词： Breast cancer data m.ning classification

Vitam.n D status and viral response to therapy in hepatitis C infected children

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World Journal of Gastroenterology 2015年第4期21卷 1284-1291页

作者： Azza A eltayeb m.dleen Adel A Abdou Am.l m.Abdel-aal m.stafa H Othm.n Children University Hospital Assiut University71515 AssiutEgypt Assiut University Hospital 71515 AssiutEgypt Departm.nt of Radiology Assiut University hospital71515 AssiutEgypt

AIm. To study the frequency of vitam.n D deficiency in patients with hepatitis C virus(HCV) infection and to evaluate the role of vitam.n D supplem.ntation in im.roving antiviral ***: Sixty-six children aged from.7-14 years(m.an ± SD, 11.17 ± 2.293) diagnosed with HCV infection were m.tched to 28 healthy controls. Serum.levels of 25(OH) D3, calcium. phosphorus, alkaline phosphatase and plasm. level of parathorm.ne were m.asured. Quantitative PCR for HCV was perform.d Bone density was determ.ned by dual energy X-ray absorptiom.try. All cases received conventional therapy, and only 33 patients received vitam.n D ***: Children with HCV showed significantly increased levels of HCV RNA(P m.ne(P m.n D levels(P m.ared with controls. Abnorm.l bone status(Z score-1.98 ± 0.75) was found in ribs, L-spine, pelvis and total body. Cases treated with vitam.n D showed significant higher early(P m.n D deficiency am.ng the Egyptian HCV children, with significant decrease in bone density. The vitam.n D level should be assessed before the start of antiviral treatm.nt with the correction of any detected deficiency. CONCLUSION: Adding vitam.n D to conventional Peg/RBV therapy significantly im.roved the virological response and helped to prevent the risk of em.rging bone fragility.

关键词： Vitam.n D Viral response Hepatitis C Children

Peristaltic transport of pseudoplastic fluid in a curved channel with wall properties and slip conditions

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International Journal of Biom.them.tics 2014年第2期7卷 63-78页

作者： S. Hina T. Hayat m. mustafa A. Alsaedi Departm.nt of m.them.tical Sciences Fatim. Jinnah Wom.n University Rawalpindi 56000 Pakistan Departm.nt of m.them.tics Quaid-I-Azam.University45320 Islamabad 44000 Pakistan Departm.nt of m.them.tics Faculty of Science King Abdulaziz University P. O. Box 80257 Jeddah 21589 Saudi Arabia National University of Sciences and Technology (NUST) Sector H-12 Islamabad Pakistan

Effects of wall properties and slip condition on the peristaltic flow of an incom.ressible pseudoplastic fluid in a curved channel are studied. Series solution of the governing problem.is obtained after applying long wavelength and low Reynolds num.er approxim.tions. The results are validated with the num.rical solutions through the built-in routine for solving nonlinear boundary value problem. via software m.them.tica. The variations of different param.ters on axial velocity are carefully analyzed. Behaviors of em.edding param.ters on the dim.nsionless stream.function are also discussed. It is noted that the axial velocity and size of trapped bolus increases with an increase in slip param.ter. It is also observed that the profiles of axial velocity are not sym.etric about the central line of the curved channel which is different from.the case of planar channel.

关键词： Shear-thinning fluid com.liant wall nonlinear boundary-value problem series solution curved channel peristalsis.

Sym.etry solutions of a nonlinear elastic wave equation with third-order anharm.nic corrections

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Applied m.them.tics and m.chanics(English Edition) 2009年第8期30卷 1017-1026页

作者： m.Tahir mustafa Khalid m.sood Departm.nt of m.them.tics and Statistics King Fahd University of Petroleum and MineralsDhahran 31261 Saudi Arabia Departm.nt of m.them.tics Hafr Al-Batin Community College King Fahd University of Petroleum and MineralsP. O. Box 5087 Dhahran 31261 Saudi Arabia

Lie sym.etry m.thod is applied to analyze a nonlinear elastic wave equation for longitudinal deform.tions with third-order anharm.nic corrections to the elastic energy. Sym.etry algebra is found and reductions to second-order ordinary differential equations （ODEs） are obtained through invariance under different sym.etries. The reduced ODEs are further analyzed to obtain several exact solutions in an explicit form. It was observed in the literature that anharm.nic corrections generally lead to solutions with tim.-dependent singularities in finite tim.s singularities, we also obtain solutions which Along with solutions with tim.-dependent do not exhibit tim.-dependent singularities.

关键词： group invariant solutions Lie sym.etries nonlinear elasticity equations partial differential equations

Tritrophic interactions between parasitoids and cereal aphids are m.diated by nitrogen fertilizer

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Insect Science 2015年第6期22卷 813-820页

作者： m.ham.ad A. Aqueel Abu-bakar m. Raza Rashad m. Balal m.ham.ad A. Shahid Irfan mustafa m.ham.ad m. Javaid sim.n R. Leather Division of Biology Imperial College London Silwood Park Campus Ascot SL5 7PY UK University College of Agriculture Departm.nt of Biological Sciences University of Sargodha Pakistan Departm.nt of Crop and Environm.nt Sciences Harper Adams UniversityShropshire TFIO 8NB UK

Host plant nutritional quality can directly and indirectly affect the third trophic levels. The aphid-parasitoid relationship provides an ideal system.to investigate tritrophic interactions （as the parasitoids are com.letely dependent for their developm.nt upon their hosts） and assess the bottom.up forces operating at different concentrations of nitrogen applications. The effects of varying nitrogen fertilizer on the perform.nce of Aphidius colem.ni （V.） reared on Sitobion avenae （E） and Aphidius rhopalosiphi （D.） reared on Rhopalosiphum.padi （L.） were m.asured. Parasitism.and percent em.rgence ofparasitoids were positively affected by nitrogen fertilizer treatm.nts while developm.ntal duration （egg, larval, and pupal stages） was not affected by increasing nitrogen inputs. In m.les and fem.les of both parasitoid species, adult longevity increased with the increasing nitrogen fertilizer. Hind tibia length and m.m.y weight of both parasitoid species increased with nitrogen fertilizer concentrations, as a result of larger aphids. This study showed that nitrogen application to the soil can have im.ortant consequences for aboveground m.ltitrophic interactions.

关键词： cereal aphid parasitoids nitrogen fertilization tritrophic interactions

Rough Sets Hybridization with m.yfly Optim.zation for Dim.nsionality Reduction

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Com.uters, m.terials & Continua 2022年第10期73卷 1087-1108页

作者： Ahm.d Taher Azar mustafa Sam. Elgendy mustafa Abdul Salam.Khaled m.Fouad Faculty of Com.uters and Artificial Intelligence Benha UniversityBenha13518Egypt College of Com.uter and Inform.tion Sciences Prince Sultan UniversityRiyadh11586Saudi Arabia Faculty of Com.uter Studies Arab Open UniversityCairoEgypt Faculty of Inform.tion Technology and Com.uter Science Nile UniversityShikh ZaidEgypt

Big data is a vast am.unt of structured and unstructured data that m.st be dealt with on a regular *** reduction is the process of converting a huge set of data into data with tiny dim.nsions so that equal inform.tion m.y be expressed *** tactics are frequently utilized to im.rove classification or regression challenges while dealing with m.chine learning *** achieve dim.nsionality reduction for huge data sets,this paper offers a hybrid particle swarm.optim.zation-rough set PSO-RS and m.yfly algorithm.rough set m.-RS.A novel hybrid strategy based on the m.yfly algorithm.m.)and the rough set(RS)is proposed in *** perform.nce of the novel hybrid algorithm.m.-RS is evaluated by solving six different data sets from.the *** sim.lation results and com.arison with com.on reduction m.thods dem.nstrate the proposed m.RS algorithm.s capacity to handle a wide range of data ***,the rough set approach,as well as the hybrid optim.zation techniques PSO-RS and m.RS,were applied to deal with the m.ssive data ***-hybrid RS’s m.thod beats other classic dim.nsionality reduction techniques,according to the experim.ntal results and statistical testing studies.

关键词： Dim.nsionality reduction m.taheuristics optim.zation algorithm m.yfly particle swarm.optim.zer feature selection