In this research, we deal with three forms of Stokes’ theorem. The version known to Stokes’ appears in the last chapter, along with its inseparable companions, Green’s theorem and the Divergence theorem. We discuss how these three theorems can be derived from the modern Stokes theorem, which appears in chapter (4), with some applications on oriented manifolds with boundary. In addition to applications of Maxwell’s field equations.
ABSTRACT The purpose of this study was to investigate the viability of using Online Social Networks (OSNs) as e-learning platforms in Tanzanian Universities. The population of this study was students of the University of Dodoma. Observation and questionnaires were used as a research instruments to collect data from 390 respondents which were proportionally selected. Quantitative data was analyzed using SPSS to obtain the breadth to which the observed behavior and practices are distributed wi...
Vegetable tannage is an eco-friendly method compared with environmental polluting chromium based method of tanning that is commonly used in commercial tanning and which prevents the collagen fibrous protein in animal skins from putrefaction and produces hydrothermal stable product commonly known as leather. Thus study was conducted to improve the tanning efficiency of locally available tanning in the Sudan 'Garad', applying blending method, physico chemical properties of 'Garad', bark an...
ABSTRACT S. aureus is an extraordinarily versatile pathogen, and it can cause a large spectrum of infections, from mild to severe and fatal. It is important in humans and also economically important when infecting animals, able to cause superficial lesions and systemic infections. The aim of this study is to detect Can, Ica, Hlg and SdrE virulent genes of Staphylococcus aureus associated with different types of infections among Sudanese in Khartoum State. The Samples were collected from dif...
This study is done to investigate the quality of water in Sodri in North of Kordfan and to see the effect of traditional mining on it’ s quality. Three samples of groundwater were collected according to standards methods:- One sample from the hafir and two samples from the wells. Samples were analyzed for physical and chemical parameters. A number of analytical techniques were used. Atomic Absorption Spectroscopy was used for quantification of elements namely iron, zinc, manganese an...
Abstract The environmental impact of traditional Gold mining activity has become a concern. The concern is due to the methods that are used in the extraction of the Gold from its co-metals, particularly the use of the Mercury. The purpose of the study to identify the impact of the traditional gold mining in Elcrow in Abo Hamad district. This research was undertaken to determine the concentration of toxic heavy metals that have been used to extract gold such as Mercury or has been released du...
Abstract. The objective of this study was to make an assessment to the building design in the nuclear medicine department of Al-neilain medical diagnostic center at khartoum, and to show the level of conformity as compared to the international standards for an ideal building designs of a nuclear medicine department in aspect of radiation protection. This study was done in Al- neilain medical diagnostic center of Khartoum, in the period from February to April 2017. Measurements of scanning ro...
Magnetic properties of matter play an important role in human life. This requires developing the physical theories that describe magnetic phenomena. One of these important fields is the magnetic properties of superconductors. Till now there is no satisfactory theory that fully explains these magnetic properties of superconductors. This set back encourages constructing a model based on temperature dependent Schrodinger equation to explain superconductivity destroy by external magnetic fi...
Samples of Anogeissus leiocarpus gum were randomly collected as natural exudates from different locations of the Sudan gum belt. The physicochemical properties of composite samples studied were moisture content, ash, nitrogen, protein, specific rotation, relative viscosity, refractive index, density, also UV electromagnetic radiation, metals ions, pH, uronic acid, reducing sugars and infrared spectra. Analysis of variant of results showed insignificant dif ferences (p < 0.05) in all pro...
At the present work a simple, precise, accurate and economical reverse phase HPLC with UV detector method, was developed and validated for the simultaneous determination of acetaminophen and orphenadrine citrate in pharmaceutical formulations. better separation was achieved using cyanide column (250mm × 4.6mm, 5μm), maintained at 25 ͦC. The mobile phase was composed of (tri ethyl amine aqueous, methanol and acetonitrile) in the ratio of 50:20:30 (v/v/v), adjusted at pH 3.8 by ortho ...
Abstract In this research two types of activated carbon (AC) were prepared from Sudanese Nabag shells. The first one of AC was prepared by pregnating the shells with sulphuric acid before carbonization. The second type of AC was prepared without chemical treatment. The percentage yield of the products were calculated and found to be 32.31% for the AC treated with acid and 24.88 % for AC prepared without chemical treatment. The functional groups for the two carbons were determined by FT-IR te...
Abstract In this thesis hydropower plants as clean and perfect source of energy has been studied. Instead of producing energy from fossil fuel and nuclear energy and other sources which affect negatively on environment of humans and animals. Where some emit harmful Co2 gas that causes global warming. And other emits harmful radiations, in addition to expensive of construction, operation and maintenance. Where hydropower is renewable, clean and inexpensive source when compared to other ways. ...
ABSTRACT This study was put in place in order to review simple model problems in continuum mechanics with internal body forces. The main objective of this study is to analyze simple model problems in continuum mechanics with internal body forces, which include the steady flow between parallel plates with internal body forces, which include review of internal body forces with its applications, internal body forces and moments, string with internal body forces, membrane with internal body forc...
ABSTRACT A semi-mechanistic model for predicting the flow behaviour of Fe-Mn-Mo steels displaying transformation-induced plasticity is developed in this paper. The model, based on the law of mixtures, takes into account the work-hardening of the individual principal phases (namely, lath-martensite and austenite/epsilon martensite). The composite strength of such a steel may be given by a modified law of mixtures which incorporates a dislocation density effect. To test the validity of the m...
Fluoroscopy refers to the use of an X ray beam and a suitable image receptor for viewing images of processes or instruments in the body in real time. Fluoroscopic imaging trades the high signal to noise ratio (snR) of radiography for high temporal resolution, as factors that maintain patient dose at an acceptable level must be used. The aim of this study was to perform quality control (QC) of image quality for three digital fluoroscopy units used c a r d io va s c ula r a n d interventi...