PhD theses : Science: Recent submissions

Now showing items 1-20 of 647

Effective Estimate with Self-Similarity for Lebesgue Measure of Some Cantorval

Abd Alfadel, Alzakey Abd Alfadel Mohammed; Supervisor, -Shawgy Hussein AbdAlla (Sudan University of Science & Technology, 2022-07-25)

We obtain the spectrum and an effective estimate for the Lebesgue measure of the preimages of iterates of Farey and Gauss maps. The intervals and dichotomy between Farey fractions and sequence in the limit of infinite level ...
New Direction in Derivative Free Optimization

Ahmed, Ahmed Mohamed Nageeb Alwasela; Supervisor, -Mohsin Hassan Abdalla Hashim (Sudan University of Science & Technology, 2023-01-19)

In this thesis, we study a derivative-free trust-region algorithm for large-scale unconstrained optimization, using symmetric-rank1 (SR1) to update the Hessian at every iteration. The centeral finite-difference iterations ...
Change of the Electrical Magnetic and Optical Properties of Nano Sodium Chloride Due to the Change of its Nano Structure

Fadl, Mahmoud Hassan Osman; Supervisor, -Mubarak Dirar Abd-Alla Yagoub (Sudan University of Science & Technology, 2022-06-28)

Nano science represents one of the most popular powerful tools for controlling and changing the physical properties of matter. It is now widely used in many applications. One of the most popular known one is the field of ...
Physiochemical Properties of some metal oxides /glycol Nano fluids

Elhassan, Sanaa Ahmed Abbashar; Supervisor, -Mohammed Sulieman Ali Eltoum (Sudan University of Science & Technology, 2023-01-12)

The thermal properties are a primary indicator in the development of energy efficient heat transfer fluids that is required in numerous industry sectors. Recently nanofluid was introduced into the heat fluids to enhance ...
Weighted Fourier Frames and Basis on Self – Affine with Moran and Sum of Singular Measures

Mohammed, Asmaa Ahmed Alhag Ibrahim; Supervisor, -Shawgy Hussein AbdAlla (Sudan University of Science & Technology, 2022-08-30)

We show the analysis of orthogonality Fourier frequencies and orbits in affine iterated function systems. We characterize the Fourier frames for the Cantor-4set, of absolutely continuous measures and for singular measures ...
نموذج إحصائى مقترح لمعالجة أوزان السلع النسبية فى تركيب الرقم القياسي لمستوى المعيشة فى السودان للعام 2019م

الطيب, رقية عبدالله; مشرف, -عادل موسى يونس (جامعة السودان للعلوم والتكنولوجيا, 2022-11-19)

تعتبر الأرقام القياسية من أهم المقاييس الإحصائية المستخدمة فى الدراسات الاقتصادية والتخطيطية، الأرقام القياسية هى مؤشرات إحصائية تستخدم لقياس تغيرات الظواهر، يعتبر الرقم القياسي لأسعار المستهلكين من أهم الأرقام القياسية ...
Determination of Some Optical and Electrical Properties for Fe Oxide Doped by Al and Cu Using X-Ray Diffraction and Ultra Violet Spectrometer

Dawra, Mahmoud Bashir Ali; Supervisor, -Mubarak Dirar Abd-Alla Yagoub (Sudan University of Science & Technology, 2023-02-22)

The energy problem is one of the long standing problems facing civilization. This problem can be solved mainly using solar cells. Unfortunately, these cells suffer from their low efficiency. To solve this problem many solar ...
QSAR, Molecular modeling, Molecular docking and Preparation of Some N-substituted Acridinedione and Polyhydroquinoline Derivatives

Ali, Ahmed Abaker Ahmed; Supervisor, - Ahmed Elsadig Mohammed Saeed (Sudan University of Science and Technology, 2022-04-02)

Quantitative Structure-activity relationship (QSAR) study was carried out using ACD/lab and MOE software’s, for developing a correlation between the structural properties of acridinedione and polyhydroquinoline derivatives ...
Evaluation of rare earth and some rare elements and their environmental impact in their mining area in northern Sudan

Dafalla, Emtithal Ali Mohamed; Supervisor, - Mohamed El Mukhtar Abdel Aziz; Co-Supervisor, - Hussein Mohamed Hussein (Sudan University of Science and Technology, 2022-03-02)

The aim of the study is to evaluate the amount of rare earth and rare elements in Albir mining area , which located about 84 km southWadi Halfa on Northern Sudan. Because of the great geological diversity of elements ...
Elementary Particles Scattering on The Basis Of Generalized Special Relativity

Mohammed, Osama Hamed Abdelwahid; Supervisor, -Mubarak Dirar Abd-Alla Yagoup (Sudan University of Science & Technology, 2022-09-27)

This study aims to study the scattering theory using the Generalized Special Relativistic and some basic quantity equations, where it was found the scattering cross-section contains a new limit in which the cross section ...
دراسة مقارنة لتحليل العوامل المؤثرة على معدل النمو الاقتصادي باستخدام أسلوب التكامل المشترك(1990-2020م)

طه, امتثال ميرغنى محمد أحمد; مشرف, -عفراء هاشم عبداللطيف محمد (جامعة السودان للعلوم والتكنولوجيا, 2021-12-26)

هدفت الدراسة إلى إختيار أفضل نموذج بين نموذجى الإنحدار الذاتي ذو الفجوات الموزعة الخطي ARDL والإنحدار الذاتي ذو الفجوات الموزعة غير الخطي NARDL للتكامل المشترك لتحليل وقياس العلاقة بين الصادرات والواردات وتحويلات السودانيين ...
THEORETICAL STUDY OF ELECTRONIC AND OPTICAL PROPERTIES OF SOME MOLECULES AS POTENTIAL ORGANIC SEMI-CONDUCTORS FOR SOLAR CELL APPLICATIONS

Ali, Zemzem Ali Abdelhasib; Supervisor, -Elfatih Ahmed Hassan; Co- Supervisor, -Sahar Shamseldden Abdalla (Sudan University of Science and Technology, 2022-09-21)

The optical and electronic properties of four conjugated organic molecules, Indigo, Alizarin, Emodin and Purpurin, as potential organic solar cells were studied theoretically. The electronic properties, reorganization ...
A Study of the Structural and Optical Properties of Nickel Doped Aluminum and Sulfur Films and its Application on Solar Cells

Ahmed, Mohamed Hamdan Hussen; Supervisor, -Rawia Abdelgani Elobaid; Co- Supervisor, -Mubarak Dirar Abdullah (Sudan University of Science and Technology, 2022-12-20)

Five samples of Nix AL 2(1-x) and five other samples of NixS1-x O4 were prepared to be used as solar cell. The aim of this work is to characterize these films to see how there can used as solar cells. The crystal and ...
Synthesis and Characterization of Silica Supported Nickel Catalysts

Jallaldeen, Zakaria Mohammed Ahmed; Supervisor, -Mohammed El mubark Osman; Co- Supervisor, -Mohammed Suleiman Ali (Sudan University of Science & Technology, 2022-04-22)

A series of Ni\SiO2 catalysts were synthesized by heating different Concentration of NiCl2 impregnation SiO2 (at load 1 %, 3%, 5 % 8 % and 10%, respectively) at 110, 300, and 500 C The nature of surface species upon drying, ...
Constituents and Antimicrobial Activity of Oils From Five Medical Plants

Ibrahim, Amna Dakeen Abdelrahim; Supervisor, - Mohammed Abdel Karim Mohamed (Sudan University of Science & Technology, 2022-04-01)

Five medicinal plants widely used in Sudanese system of traditional medicine have been investigated for constituents by GC-MS analysis. The oils from these plant species have been extracted by maceration and their ...
Synthesis, Characterization, Molecular Docking, and Antimicrobial Activities of Dinuclear Nickel(II) Palladium(II), and Platinum(IV) Complexes

EBRAHIM, REEM MOHAMED AHMED; Supervisor, - Yousif Sulfab Ahmed; Co-Supervisor, - Elmugdad Ahmed Ali (Sudan University of Science & Technology, 2022-10-01)

The Schiff base of benzidinedioxime was synthesized by the condensation reaction of benzidine with diacetylmonoxime in acid media. The chemical structure, electronic properties, and crystal structure of benzidinedioxime ...
Quantitative Structure Activity Relationship, Molecular Docking Study and Synthesis of Some Quinoline Derivatives

Mohammed, Mohammed Musa Ahmed; Supervisor, - Ahmed Elsadig Mohammed Saeed (Sudan University of Science and Technology, 2022-06-01)

Several quinoline derivatives have an important role in the biological activities field. This importance leads to investigate of newly designed and synthesized of quinoline derivatives against mycobacterium tuberculosis ...
Removal of Heavy Metals from wastewater by Zeolite and Silver Nanoparticles Doped Zeolite

Sorkati, Zeinab Ali; Supervisor, - Mohammed Adam Abbo (Sudan University of Science & Technology, 2022-10-01)

Zeolite have been used for removal of heavy metals in many application in different fields such as agriculture, industry and medicine The present work aimed to test the efficiency of natural zeolite collected from Gadaref ...
Characterization and Antimicrobial Activity of Oils from Five Medicinal Herbs

Bashir Elhassan, Sima Ahmed Mohamed; Supervisor, - Mohamed Abdel KarimMohamed (Sudan University of Science & Technology, 2022-08-01)

This research was designed to study the seed oils of five potential medicinal plants. (Carum carvi, Coriandrum sativum, Hibiscus sabdariffa )grown in Egypt(; Nerium oleander, Lagenaria siceraria)grown in Sudan). The ...
Analysis of Toxic Elements, Heavy and Radioactive in Kadugli Soil using Spectroscopic Techniques

Awad, Aisha Rabih Mohammed; Supervisor, - Khaled Mohamed Haroun Mohamed; Co-Supervisor, - Ahmed ELhassan Elfaki Idris (Sudan University of Science & Technology, 2022-08-10)

There is a clear interest in recent years to determine the concentrations of radioactive, toxic and heavy elements in the soil of areas of traditional mining, and find out if these concentrations are within the safe limit ...

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