The nuclear magnetic shielding constant
has calculated for He-isoelectronic series (Z=2to10), Li-isoelectronic series (Z=3to5), Be and Li-1 by using RHF method and Data published by Andrew W.
This study is carried out to determine the possibility of using the Iraqi Bentonite raw material for bleaching the cottonseed oil and to study the effect of treatment with acid and caustic on the process of bleaching as well as the effect of the particle size, the degree of temperature and the time required for the process.The Iraqi local material was examined by X-ray diffraction (XRD) and infrared spectroscopy (IR) techniques, also chemical and mineral analysis were used to determine the clay characteristic.Two methods of adsorption were used the physical and
This study is carried out to investigate the possibility of using Iraqi clay; Duekhla kaolin as filler in the paper industry by reducing the percentage of iron oxide, titanium dioxide, and free silica. Duekhla Kaolin containe about 1.7% iron oxide, 1.2% titanium dioxide, 51.16% silicon dioxide, and 12% free silica. The existence of these oxides in kaolin is undesired in paper-making. The process started by washing Duekhla kaolin with (4N) HCl to remove all the soluble oxides which are not required in paper making.
The One-dimension theory is applied to study the performance of free electron laser amplifier when the electron beam have a uniform density distribution in the direction perpendicular to the helical undulator axis with initial phases uniformly distributed along the interval (0-2π). The matlab 6.1 program is used to built the computer programs that used in this work.In the present work, the motion of electron are considered inside the helical undulator. The equations of motion for electron inside the undulator, show that three effecting parameters, they are:
This study was carried out to prepare a porcelain samples, which can be used as an electrical insulator. The raw materials used for the preparation are kaolin Duakhla, Arudhma Sand glass and Potash feldspar with weight percentage (45%, 30%, 25%) respectively. A chemical treatment was performed on kaolin Duakhla, Arudhma Sand glass to remove all the impurities. The effect of the washing by HCl acid (chemical treatment) was examined by IR Tech.
With the aid of transfer matrices method and personal computer a computational research has been carried out on the properties of a rectangular model representing the axial field of an electrostatic quadrupole triplet lens. The path of charged–particles beam traversing the rectangular fields has been determined by solving the trajectory equation of motion in Cartesian coordinates. A computer program has been written for this purpose.
Fractal audio compression is based on the concept of a partitioned iterated function system (PIFS). Fractal audio compression exploits the affine redundancy that is commonly present in audio; this redundancy is related to the similarity of an audio with itself.In other words, fractal audio compression finds similar patterns that exist in different scales and different places in audio, and then eliminates as much redundancy as possible.
The study of the resampling and requantization methods of digital audio data is one of the major assets project. Which these methods used to compression the audio data. In this search the application of some resampling methods on the audio signal was investigated by reducing the number of samples while the audio quality is maintained.
A mathematical model describing the densification process during viscous sintering process of a material contains solid inclusions is developed (modified) from a Scherer model which describes the rate of densification during sintering for a free solid inclusions material. The modified model is used to simulate the rate of densification during sintering process for ceramic heterogeneous materials consist from mixtures of some Iraqi clays that had been prepared in a previous work.
Both analysis and synthesis approaches of optimization method are used in the present work to finding the optimum design of magnetic and electrostatic deflectors which give rise to the minimum spherical and chromatic aberration. In magnetic deflector calculations, the synthesis approach is used; the saddle yoke deflection coil is used as the source of magnetic field, then some axial field distribution models are to be used and new field distribution model to be suggested. The moving objective lens concept is included in the computation of deflection field.
