Papers by Sawsan Ahmed Elhouri
In this work a weak radioactive source was used, and different thickness of ordinary concrete cla... more In this work a weak radioactive source was used, and different thickness of ordinary concrete clad with lead and concrete containing sodium chloride salts covered with lead in order to study how radiation is attenuated by different materials of different thicknesses. This is important knowledge for those who design radiation shields, to protect the human organism, it should be in controlled situations; where radiation is employed to perform desired tasks, such as medicine, or nuclear power plants, so unwanted exposure must be avoided. It may also be the necessary knowledge to protect human life from nuclear explosions in a situation of warfare. I.
The problem of radial free fall one of the most interesting problems in black holes physics. Usin... more The problem of radial free fall one of the most interesting problems in black holes physics. Using the Generalized Metricusing the velocity and acceleration equations of radial free falling massive particle has been formulated. Applying weak field approximation of generalized equations of velocity and acceleration,the same GR equations for acceleration and velocity obtained
General Relativity is one of the most important branches of Physics that changes radically the co... more General Relativity is one of the most important branches of Physics that changes radically the concepts of space, time and matter. It can describe successfully the behavior of the gravitational field and it gives wonderful solutions of many gravitational problems, which agrees with astronomical observations to a high degree of precision. But unfortunately, it suffers from noticeable setbacks. For example, the cosmological model based on it suffers from certain cosmological problems. These problems include the behavior of quasars and pulsars, where the field is too strong and that is difficult to be understood in terms of General Relativity. Many attempts were made to go beyond General Relativity. Among these the Generalized Field Equation (GFE), which is based on a more general form of fourth order differential equations, looks more promising. This is due to the successes of it in making these problems controllable, in this work exact solution of Generalized Field Equation metric has been done where the field is strong near the black hole horizon and agree with General Relativity solution at weak field a distance from horizon, and apply this generalized metric in radial null geodesic and Eddington-Finkelstein Coordinates
In this work the effect of sound with different frequencies on some of Pandanusamaryalifolious le... more In this work the effect of sound with different frequencies on some of Pandanusamaryalifolious leaves extracts was measuredat different seasons in Khartoum State, Omdurman, Sudan. A noticeable results were detected
In this work, samples of nanomaterials of zinc oxide doped with titanium oxide were prepared, and... more In this work, samples of nanomaterials of zinc oxide doped with titanium oxide were prepared, and the optical properties were studied using X-ray diffraction and ultraviolet technology for all samples. It was found that the absorption, reflection, absorptive coefficient, refractive index, and optical conductivity have constant values that do not change when exposed to gamma rays. Transmission decreases and the optical energy gap decreases from (3.747 to 3.468). While the electrical conductivity increases. As for the diffraction of the X-rays, it takes the shape of a cube before exposure to the rays. It takes the shape of a triangle after exposure to radiation Cell Angular alpha 90 90 90 90 90 90 90 90 90 90 Beta 90 90 90 90 90 90 90 90 90 90 gam ma 120 120 120 120 120 120 120 120 120 120
In this work, samples of nanomaterials of zinc oxide doped with titanium oxide were prepared, and... more In this work, samples of nanomaterials of zinc oxide doped with titanium oxide were prepared, and the optical properties were studied using X-ray diffraction and ultraviolet technology for all samples. It was found that the absorption, reflection, absorptive coefficient, refractive index, and optical conductivity have constant values that do not change when exposed to gamma rays. Transmission decreases and the optical energy gap decreases from (3.747 to 3.468). While the electrical conductivity increases. As for the diffraction of the X-rays, it takes the shape of a cube before exposure to the rays, and it takes the shape of a triangle after exposure to radiation
In this paper we studied local natural dyes extracted from curcumin to study I-V characteristic f... more In this paper we studied local natural dyes extracted from curcumin to study I-V characteristic for dye-sensitized solar cell. In preparing the cell, some commercial nanoscale titanium dioxide (TiOR 2 R) was used as a semiconductor material and photoelectron, which was coated on glass slides of tin oxide mixed with fluorine (FTIO), these slides were immersed in the extracted dye to obtain the positive end of the cell, while the negative end of the cell was obtained by coating the (FTO) glass slides with graphite thin iodine solution which used as liquid electrolyte.The cell was collected and electrical properties (I-V) characteristic was investigated. The results showed that the highest efficiency of cur cumin dye was 0.44156%.
In this work, nickel oxide Nano-material samples were prepared with different concentrations (0.1... more In this work, nickel oxide Nano-material samples were prepared with different concentrations (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1) m Molar by doping with magnesium oxide with respect to the formula (NiR x RM gR 1-x ROR 2 R). Optical properties of nickel doped by different concentration of magnesium was measured using the UV-Spectroscopy min 1240. The Nano crystal size of all samples were measured by XRD technique, and also studying the effect of different concentrations on the particle size and crystal properties of all samples. The study the effaced of different concentration on the optical parameters before and after irradiation by gamma rays, for all samples the absorbance increases upon increasing the concentration, while the transmission decreases. The value of Energy band gap (ER g R) was decreased from (3.757) eV to (3.503) eV. The density increasing by rat 0.009 mg. CmP 3 P /molar. Particle Size decreasing by rated 3.18 nm / molar, and d-spacing were decrease molar rated 1.9x 10P-10 P m / molar.
In this work, nickel oxide Nano-material samples were prepared with different concentration (0.1,... more In this work, nickel oxide Nano-material samples were prepared with different concentration (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1) m Molar by doping with magnesium oxide with respect to the formula (NiR x RM gR 1-x ROR 2 R). Optical Properties of nickel doping by different concentration of magnesium measured by using the UV-Spectroscopy min 1240, The Nano crystal size of all samples were measured by XRD technique, and studying the effect of different concentrations on the particle size and crystal properties of all samples. The study effaced of different concentration on the optical parameters before and after irradiation by gamma rays, for all samples the absorbance increases upon increasing the concentration, while the transmission decreases. The value of energy band gap (ER g R) was decreased from (3.757) eV to (3.503) eV. The density increasing by rat 0.009 mg. CmP 3 P /molar. Particle Size decreasing by rated 3.18 nm / molar, and d-spacing were decrease molar rated 1.9x 10P-10 P m / molar.
The ordinary conventional Schrodinger equation is based on the Einstein energy-momentum relativis... more The ordinary conventional Schrodinger equation is based on the Einstein energy-momentum relativistic relation for zero ret mass. This motivates searching for a new quantum Schrodinger equation based on non-zero rest mass energy-momentum relativistic relation. The new equation consists of an additional mass term and reduced to the conventional one for zero ret mass. It predicted a stationary time independent wave solution. For the case of a particle in a box it shows that the mass is quantized and is strongly dependent on the box size.
Potential dependent special relativity theory as used to drive new relativistic quantum equation.... more Potential dependent special relativity theory as used to drive new relativistic quantum equation. This new quantum equation consist of an additional rest mass term. This equation reduces to the conventional one in the absence of the rest mass term. A new expression of the scattering flux and scattering cross section was obtained. These new expressions consist of an additional term standing for rest mass. The two equations reduce to the conventional one for zero rest mass. The additional rest mass term indicates that the scattering flux and cross section is different for scattered particles having different rest masses which agrees with experimental observations and common sense.
The invariance of space-time infinitesimal distance is used to derive special relativistic time d... more The invariance of space-time infinitesimal distance is used to derive special relativistic time dilation and length contraction. The concept of force in 4 dimensional space-time is defined in terms of momentum and potential. This shows that the relativistic energy is a complex quantity when defined in terms of this new definition of the force. This new energy relation successfully gives the ordinary special relativistic energy-momentum relation. This complex energy relation resembles that of Ac circuit.
In this work an alternative method of deriving the Schwarzschild radius and short range energy of... more In this work an alternative method of deriving the Schwarzschild radius and short range energy of a black hole has been used. The method uses short range repulsive gravitational force beside long range attractive gravity force. The critical radius of the star requires minimizing the total energy and can be found by using the conditions for minimum value within generalized special relativity. This critical value was typical to that of general relativity for black hole. This model indicates finite ness of mass and energy and shows that the mass is in the form of a hollow sphere.
Water plays an important role in our life. Thus, the aim of this work is to study the effect of w... more Water plays an important role in our life. Thus, the aim of this work is to study the effect of water containers and food supplements on the water PH. This is done by examining the water PH using PH meter. Water was poured inside pride, steel, glass and plastic containers. The food supplements added to water for different concentrations are mint, ginger, lemon, cinnamon and fenugreek respectively. The PH for all food supplements decreases upon increasing their concentrations, except ginger which increases his PH with concentration. The effect of the container on the water PH shows that only pride container increases water PH with time where it attains a maximum value of 7.17 after about 60 minutes. The ultraviolet test for water in pride shows increase of absorption coefficient with time
The aim of this study is to see how the addition of mint and ginger to water with different conce... more The aim of this study is to see how the addition of mint and ginger to water with different concentration affect water ionization and conductivity using different containers like glass, steel, plastic and pride. The conductivity results show no considerable changes upon increasing concentrations or changing the container. This may be attributed to the very low sensitivity of the conductivity device. Fortunately, the ionization degree increases with concentration linearly. This may be related to the use of very sensitive ammeter on the scale of µA.
In this work two samples of a (Pandanus amaryalifolious) leaves extracts, were exposed to sound w... more In this work two samples of a (Pandanus amaryalifolious) leaves extracts, were exposed to sound waves length of (528 nm and 741 nm) while the third sample of the leaves was left without exposure to any sound. Phytochemical analysis was used to find the effect of different wave lengths absorption by the samples; it showed a dramatic difference at the concentrations of some organic elements.
In this work two samples of a (Pandanus amaryalifolious) leaves extracts, were exposed to sound w... more In this work two samples of a (Pandanus amaryalifolious) leaves extracts, were exposed to sound waves length of (528 nm and 741 nm) while the third sample of the leaves was left without exposure to any sound. There was difference of absorption in each sample; these differences were detected using X-Ray Tubes Techniques. The difference of absorption showed the range of germination is not the same in the three samples. As well as the difference in the combination's bonds of the fundamental molecular vibrations as well.
In this study a quick summary for the back-hole theory was presented. It was presented earlier in... more In this study a quick summary for the back-hole theory was presented. It was presented earlier in from of graduation project at university of Bahri, college of applied and industrial sciences department of physics, Khartoum, Sudan by the second author and under supervision of the first author Black holes were once a star shining for years, before eventually collapse on their core forming the BH. There are three cases for a star non stable end is either a white dwarf, a neutron star or a black hole which is completely depend on the mass of the previous star which are called a compact star due to their highly condensation states. In this paper a quick summary for the theory was presented.
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Papers by Sawsan Ahmed Elhouri