Masters Dissertations : Sciencehttp://repository.sustech.edu/handle/123456789/13152019-04-23T02:02:24Z2019-04-23T02:02:24ZLogarithmic Bump with Bilinear T (B) Theorem and Maximal Singular Integral OperatorsAhmed, Hind Mohammed IbrahimSupervisor, - Shawgy Hussein AbdAllahttp://repository.sustech.edu/handle/123456789/225142019-04-01T12:38:24Z2016-11-10T00:00:00ZLogarithmic Bump with Bilinear T (B) Theorem and Maximal Singular Integral Operators
Ahmed, Hind Mohammed Ibrahim; Supervisor, - Shawgy Hussein AbdAlla
We show that if a pair of weights (u,υ) satisfies a sharp Ap - bump condition in the scale of all log bumps certain loglog bumps , then Haar shifts map L^p (υ) into L^p (u) with a constant quadratic in the complexity of the shift . This in turn implies the two weight boundedness for all Calderón – Zygmund operators. We obtain a generalized version of the former theorem valid for a larger family of Calderón – Zygmund operators in any ambient space . We present a bilinear Tb theorem for singular operators Calderón – Zygmund type. Extending the end point results obtained to maximal singular. Another consequence is a quantitative two weight bump estimate.
Thesis
2016-11-10T00:00:00ZSynthesis, Characterization and Determination of the Thermophysical Properties of Copper (II) Oxide/water NanofluidAhmed, Lamia Isam BabikerSupervisor, -Mohammed Suleiman Ali Altoumhttp://repository.sustech.edu/handle/123456789/223672019-02-18T08:33:20Z2018-09-26T00:00:00ZSynthesis, Characterization and Determination of the Thermophysical Properties of Copper (II) Oxide/water Nanofluid
Ahmed, Lamia Isam Babiker; Supervisor, -Mohammed Suleiman Ali Altoum
Copper (II) oxide /water nanofluid was prepared in two steps by using wet chemical method to prepare copper oxide nanoparticles and ultrasonic vibration for dispersing nanoparticles into de-ionized water. The characterization results show that the preparing of copper oxide /water nanofluid was successful.
The thermophysical properties: density, viscosity, Specific heat capacity and thermal conductivity were studied at different concentrations of the nanofluid (1, 2, 3 and 5) Wt%. The measuring results of the thermophysical properties show that at constant temperature; density, viscosity and thermal conductivity were found to increase by increasing the concentration of nanofluids. But the specific heat of nanofluid decreases with the increase in concentration.
The stability of the nanofluid was measured and it found that nanofluids are stable for approximately 25 days.
Thesis
2018-09-26T00:00:00ZUnification of Gauge Coupling Constants in 5D Pati-Salam ModelFadol, Shama Ibrahim MohammedSupervisor, -Ammar Ibrahim Abdalgabarhttp://repository.sustech.edu/handle/123456789/223662019-02-18T08:25:15Z2018-11-24T00:00:00ZUnification of Gauge Coupling Constants in 5D Pati-Salam Model
Fadol, Shama Ibrahim Mohammed; Supervisor, -Ammar Ibrahim Abdalgabar
The standard model of particle physics is currently an accepted theory at low energies; however, it doesn’t address the unification of gauge coupling constants. In this dissertation, the renormalization group equations at one loop order in the standard model, both in 4D and 5D, in addition to Pati-Salam model (4D and 5D) have been studied. We found, both analytically and numerically, that a natural and successful gauge coupling unification could be achieved in 4D Pati-Salam model with MR=1011GeV, and that the unification occurred there at Λ=1013GeV; further in and 5D Pati-Salam model a unification occurred too with MR=107GeV and compactification scale 1𝑅=106GeV at high energy scale, these results show that the gauge coupling constants are almost unified at high energy in Pati-Salam model.
Thesis
2018-11-24T00:00:00ZChemical Constituents and Biological Activity of Raphanus sativus OilOsman, Alyaa Abubaker AwadSupervisor, -Mohamed Abdel Karim Mohamedhttp://repository.sustech.edu/handle/123456789/223392019-02-11T08:27:18Z2018-10-18T00:00:00ZChemical Constituents and Biological Activity of Raphanus sativus Oil
Osman, Alyaa Abubaker Awad; Supervisor, -Mohamed Abdel Karim Mohamed
Raphanus sativus oil were extracted by hexan at room temperature.The
oil was then analayzed by GC-MS.The analysis showed 15
components.The major constituent are: (z)13-Docosenoic acid,methyl
ester(35.48%);9-octadecenoic acid(z)methyl ester(17.12%) ; Cis-11-
Eicosenoic a cid,methyl ester(11.64%);9,12-octadecadienoic acid (z,z)
methyl ester(10.77%); (Z,Z,Z) 9,12,15-oct adecatrienoic acid,methyl
ester (7.14%); Hexadecanoic acid,methyl ester(5.48%).
Inc cup plate agar diffusion bioassay, the oil was assessed for
antimicrobial activity against apanel of standard human pathogenic
microbes.At a concentration of 100mg/ml,the oil showed partial activity
against Acinetobacter baumannii. Staphylococcus aureus ,Bacillus
subtilis and Aspergillus flavus.
Thesis
2018-10-18T00:00:00Z