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Browsing PhD theses : Science by Issue Date
Now showing items 1-20 of 647
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(Sudan University of Science and Technology, 2-08-2015)The subject of this work is a radiological study of environmental radionuclides along the River Nile branch in northern Sudan. Measurements of natural and some artificial (man-made) radionuclides in sediments, water ...
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(جامعة السودان للعلوم والتكنولوجيا, 2004-01-01)بعد أن تطرَّق لخصائص النيوترينو وتمحيص ظاهرة كتلة النيوترينو، إنتحى البحث نهجاً وصفياً بحتاً في عرض نتائج قياسات كتلة النيوترينو، وفقاً للتجارب المختلفة، ومقارنتها مع المعطيات المستقاة من النماذج النظرية ذات الصلة. حسب ...
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(جامعة السودان للعلوم والتكنولوجيا, 2004-01-01)حدث في السنوات القليلة الماضية تطور بالغ في فيزياء الطاقة العالية وترافق ذلك مع ظهور تجهيزات تقنية عالية الدقة والحساسية سجلت خطوات عملية ملموسة بإتجاه الكشف عن مكنونات المادة. يتركز هذا البحث حول دراسة التبعثر العميق ...
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(Sudan University of Science and Technology, 2004-02-01)The rate of oxidation of substituted phenols in wastewater was studied by reaction of phenols with polyoxometalate catalysts to activate H2O2. The substituted phenols used in this study are, phenol, para-Cresol, ...
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(Sudan University of Science and Technology, 2004-07-01)Acacia Polyacantha gum samples were collected as natural exudates, from three different locations, namely Abugarin and Gargadah (season 2000/2001and2001/2002) and Layoon forest (season (2000/2001). Physicochemical ...
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(Sudan University of Science and Technology, 2004-08-01)Some spin and interference phenomena in neutrino-electron interactions are investigated. The cross section of elastic neutrino (antineurino) – electron scattering with account of electromagnetic neutrino interaction is ...
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(Sudan University of Science and Technology, 2004-09-01)Protons and neutrons are considered as the first discovered atomic elementary particles, in the twentieth century. They are considered as building block of nuclei, they are known as nucleons and occupy more than 99.9% of ...
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(Sudan University of Science and Technology, 2005-01-01)This thesis falls into five chapters. The main objective is to discuss and solve the problem of optimal control for systems described by both deterministic and stochastic ordinary differential equations. The principle of ...
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(Sudan University of Science and Technology, 2005-01-01)The objective of this thesis is a proof of existence and uniqueness of some partial differential equations. This is achieved via the energy inequality, the method of functional analysis or the method of a prior estimate ...
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(Sudan University of Science and Technology, 2005-01-01)Dialkyl-dithiocarbmato iron (111) complexes have been used for the deposition of iron sulfide thin films using chemical vapor deposition techniques. The single-source precursors used in this work have been prepared by ...
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(Sudan University of Science and Technology, 2005-01-01)Einstein`s theory of General Relativity (GR) succeeded in describing a number of gravitational phenomena by being in agreement with astronomical observational measurements. In spite of that, this theory kept being isolated ...
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(Sudan University of Science and Technology, 2005-04-01)The ordinary least squares method is considered as one of the most important ways of estimating the parameters of the general linear model because of its ease and simplicity and rationality of the results that obtained ...
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(Sudan University of Science and Technology, 2005-09-01)Grafting of N-tert-Butylacrylaide (BAM), tert-Butylacrylate (BAC), and n-Butylacrylate (n-BAC) onto maize starch in aqueous medium initiated by ceric ammonium nitrate (CAN) has been studied under N2 gas. The optimum ...
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(Sudan University of Science and Technology, 2005-12-01)This study concern fertility levels and trends in Sudan. During the last three decades fertility has been declining substantially in all the developing countries. Sudan, as one of these countries has witness a rapid decline ...
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(Sudan University of Science and Technology, 2006-01-01)In this thesis it's found that the universe expansion might be accelerating. In other words it is made to expand by a new strange kind of energy, and that the cosmological constant assumed by Elbert Einstein to represent ...
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(Sudan University of Science and Technology, 2006-01-01)We presented in this thesis a new Hamiltonian, The Modified Semi-Relativistic Hamiltonian (MSRH). When considering the rest mass energy of the particle as well as its spin, this Hamiltonian serves as a generalization to ...
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(Sudan University of Science and Technology, 2006-01-01)Neutrino physics has been an active and successful research field in recent years, especially experimentally. As a result of a series of great experimental discoveries neutrino oscillations are today a well established ...
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(Sudan University of Science and Technology, 2006-01-01)A number of physicochemical methods were used to characterize different species of gums of Sudanese origin. Physical and chemical properties such as moisture, ash, intrinsic viscosity, specific rotation, nitrogen and ...
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CO2 Laser Design, Construction and Evaluation of Its Effect on Semiconductors Electrical Properties (Sudan University of Science and Technology, 2006-01-01)A homemade CO2 laser system have been designed, and constructed in the frame of this work, in addition to that, a locally made power supply was used. The performance of the constructed high voltage DC power supply from 0 ...
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(Sudan University of Science and Technology, 2006-01-10)New optical tellurite glasses have been synthesized in the form 80TeO2-5TiO2-(15-x)WO3-xAnOm where AnOm is Nb2O5, Nd2O3 and Er2O3 and x = 0.01, 0.1, 1, 3, 5 and 7 mol%. Densities of the prepared glasses were measured at ...
Now showing items 1-20 of 647
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