Research Papers/Topics in Physics

Use of X-Ray in Non Destructive Testing to determine gold karat

Abstract The fire assay technique is the oldest and most reliable method used to determine gold karat, because of the destruction of gold into pieces and the long time which spent at analyzing; a well powerful for nondestructive analytical analyzer had took it place, it is x-ray fluorescence spectroscopy (XRF) that we used to analysis gold specimens. It is fast and accuracy technique, XRF can provide qualitative and quantitative analysis regarding the thickness of the tested material by meas...

Detection Of Pollutants In Used Plastic Bottles Using Laser Induced Breakdown Spectroscopy

Abstract This study was conducted to analyze the components of the plastic materials used in water and drug bottles by using laser induced breakdown spectroscopy (LIBS). Bottle samples were collected from some factories in Sudan, the samples were collected pre- and post-used. Samples were irradiated by Nd: YAG laser at 266 nm, repetition rate 2Hz, with pulse energy of 80mJ. The recorded spectra of the samples were analyzed using National Institute Standard and Technology (NIST) and Origin L...

The Effect Of Changing Solvent, Dyes And Zno Nanosize On The Performance Of Zno Solar Cell

Abstract The effect of different solvents on Zinc Oxide based Dye Sensitized Solar Cells (DSSC) with Nile Blue were studied. The performance of solar cells with on (FTO/ ZnO/ Blue Nile dye /FTO+ graphite and Iodine ) structures were investigated. under the effect of different solvents, which on (Methanol ,Ethanol ,Acton , Chloroform and Benzene ). Absorption and energy gap were found using UV-VS mini 1240 spectrophotometer and light current-voltage characteristics and XRD. The five (FTO/ ZnO...

Spatial Evolution in the Interaction Model and Schrodinger Equation in a Curved Space-Time

Abstract This study is concerned with derivation of quantum relation in a curved space –time . The importance of this study emerges from the use of energy and momentum in many applications. This study use mathematical derivation trend. The research problem is related to the lack of suitable consistent relations for quantum eigen equations in a curved space , beside lack of relations for the special quantum evolution in the interaction model. Therefore this research aims to use the expressio...

Study Of Charge Transition Levels Of Intrinsic Defect, Band Gab, And Formation Energy In Barium Fluoride And Calcium Fluoride

ABSTRACT This Thesis study semi local and hybrid density functional analysis of charge transition levels of native defects in BaF2 and CaF2 structures. The transition levels was calculated from the formation energies corresponding to two defect charge states. The errors arising from the small super cell size effects have been relieved through extrapolating the formation energies to the limit of infinite super cell size. The reliability of the extrapolation method has been verified through th...

Evolution of the Inverse Fine Structure beyond the Standard Model

Abstract In this dissertation, the one-loop renormalization group equations for the gauge couplings in five and six dimensional models as well as 5D Minimal Super-symmetric Standard Model were derived. We considered different localization of matter fields that is, all fields propagate in the full space-time (bulk case), or some of the fields restricted in the brane (brane case). We studied the evolution of the inverse fine structure constants , which is linked to the gauge couplings constant...

Detection of Some Elements in Sand (Reddish Orange and Black) by Using X-Ray Fluorescence Device

Abstract This research deals with one of the applications of spectroscopy, which is the detection of some components of sand and the concentrations of these elements using X-ray fluorescence technology and comparison between them. Where sand samples were taken from Bara north Kordofan region (red-orange, black) from surface and depth (30cm, 70cm). It was found that the elements present on the surface of the red-orange sample are: Silicon (Si), Zirconium (Zr), Thorium (Th), Titanium (Ti), and...

Calculating the Energy Gab of Photo Resistance Using Temperature Variation

In this thesis photo resistor (CdS) was used to calculate the energy gab using simple electrical method, it was found that to be and and electrical conductivity of photo resistor equal to and (I.V) characteristic was studied under the influence of temperature variation and constant polarization angle of irradiation (𝜃 ,also the of relation versus angle 𝜃 at constant voltage was considered with temperature variation. Different relation was plotted and the results were discussed fo...

Assessment of Building Design of Nuclear Medicine Department of Al-nilain Medical Diagnostic Center of Khartoum.

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...

A Study on Hydropower Plants Dams

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. ...

Assessment of Natural Radioactivity Levels and Associated Dose Rates in Soil Samples from Al South Kordofan StateـــDallanj Area

In this study 15 soil samples were collected from Dallanj town where dividing the town into five parts (E, C, S, N and W) using GPS .Three samples were taken from each part. 500 grams of soil sample was weighed and closed in plastic containers for four weeks so as to have secular equilibrium for uranium. Our goal of this study was estimate Investigation of Radionuclides Soil Samples from South of Kordufan state (Western Sudan). Natural radioactivity concentrations in soil samples were m...

Use of Tidal Energy as Renewable Energy

Abstract Currently climate change represents the focus attention of the global world and how to reducing greenhouse gas emission, which led to use other energy source, especially renewable energy source, Tidal power it is a renewable and clean source of energy, can represent a solution of the many environmental pollutants resulting from use another energy source, besides this source exposed to exhaustible as a result of intensive use. Tidal power is unconventional sources of energy which is ...

Using Logistic Regression and Discriminant Analysis Techniques for Factors Affecting Heart Diseases Infection (A comparative study of Cardiac surgery and renal transplant Center at Ahmed Gasi

Abstract Diagnosing cardiac diseases by using an advanced statistical classifying model is vitally important for cardiac diseases which are viewed as serious diseases which can put an end to a patient’s life, therefore, early diagnosis should be done through classification and to differentiate among the cardiac patients and non-cardiac ones based on the factors that can cause the cardiac diseases by using technologies such as logistic regression and discriminative analysis. This study aime...

Wind Energy and Solar Energy Potential in the Red Sea Coast

Abstract The Red Sea coast enjoys high values of wind speed and moderate values of solar radiation. Wind Atlas Analysis and Application Program (WAsP) has been used to analyze the wind data at Tokar, Free Zone and Port Sudan. The power densities at the three sites,at 50 m height,are 584, 288 and 300 W/m2, respectively. Both solar and wind can be utilized to supply electricity to that area.

Usage of Laser Induced Emission to Distinguish Between Dental Caries and Sound Teeth

Abstract In this research Nitrogen laser (N2) was used to induce emission to distinguish between the dental caries and sound teeth. Three samples of dental caries and one sample of sound teeth has been used to determine absorbance of the dental caries and sound teeth using UV-Vis spectrophotometer then it irradiated by nitrogen laser (N2) with wavelength of 337.8nm, pulse energy 0.04mJ, and pulse time 100msec, interaction between laser and the teeth was happened, teeth absorbed some of these...


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