Diffusion of Innovation and Generalized Rational Models

The purpose of this research is to develop and use two generalized Rational Models (GRM I, GRM II), each of which is a realizable mathematical model, not available with other models, and we will demonstrate its utility and applicability on a large scale, compared to other ( -shaped) models, and converging well.

Experimental and Analytical Study of absorbance phenomenon in unsaturated polyester – wood flour

In this study, we have investigated the water absorption behavior of unsaturated polyester /wood flour wastes composites materials. To achieve that, specimens were prepared by using compressing method with different ratio of polymer matrix with organic wastes produced from carpentry workshop (wood flour).Density of produced panels has been measured and the obtained results showed that there is an ability to produce hardindustrial wood panels. Practical experiments had been achieved to determine the percentages of water absorption. Absorption test was achieved on the cut specimens by immersing them in natural water (un-distilled) and measuring the gained weight of specimens and the resulted swelling to determine the final changes in the product. Through this study, we find that the absorbability has increased with the increment of organic filler ratio and the practices sizes increment. In addition, we also find that the absorption behavior follow Fickian law of diffusion in most specimens. We calculated the diffusion coefficient D and other parameters of diffusion process and we also plotted the associated plotsof the absorbability results. The obtained results showed that there is an ability to produce planes of industrial wood without any pretreatment of wood flour.

Numerical Solution of Non-linear System of Partial Differential Equations by Using HPM Method

In this article, we propose a powerful method called homotopy perturbation method (HPM) for obtaining the analytical solutions for an non-linear system of partial differential equations. We begin this article by apply HPM method for an important models of linear and non-linear partial differential equations.

Detection of pigeonpox by traditional methods

This study was conducted on domestic pigeons populations in the provinces of Hama, Idlib and Latakia using several conventional diagnostic techniques , including pathological examination tests and agar gel immune diffusion test and isolation on chicken embryo. The number of suspected birds to be infected by pigeon pox through clinical symptoms and macroscopic lesions were about 37 birds. we noticed the presence of lesions in warts and scars on the nonfeather parts of the face and on the corner of the mouth and eyelids and other areas of the body. the most of these accompanied by the presence of the of defteric lesions on the mucous membrane of the oral cavity. The results showed that all birds suffered from the presence of infection fowlpox through histological examination of skin and difteric lesions. the results has been confirmation by agar gel immune diffusion test. And we successfully isolated the virus that caused the disease by injection on the Chorioallantoic membrane of a chicken's egg fertilized SAN.

Numerical Solution of Some Important Models of Partial Differential Equations Using Approximate - Analytical Methods ( ADM – VIM )

In this article, powerful approximate analytical methods, called Adomian decomposition method and variational iteration method are introduced and applied to obtaining the approximate analytical solutions for an important models of linear and non-linear partial differential equations such as ( nonlinear Klein Gordon equation - nonlinear wave equation - linear telegraph equation - nonlinear diffusion convection equation ) . The studied examples are used to reveal that those methods are very effective and convenient for solving linear and nonlinear partial differential equations . Numerical results and comparisons with the exact solution are included to show validity, ability, accuracy, strength and effectiveness of those techniques.

Control and evaluation the bactericidal effect of Povidone-Iodine solutions common in the local market

The free iodine (I2) in povidone-iodine (PVP-I) solutions is responsible for its bactericidal activity, the bactericidal effect is steadily increased with the free iodine concentration. This study aims to compare some of povidone-iodine solutions common at the local market with one solution produced by Mundipharma company (Betadine®) which used as a reference. Commercial samples (PVP-I 10%) were obtained from three local companies (A, B, C), with one batch from each company. The research included controlling free iodine concentration, pH and evaluation of bactericidal activity by using disc diffusion method and rapidity of the bactericidal activity on both Staphylococcus aureus and Escherichia coli. The local samples solutions showed low pH values compared with Betadine®, furthermore, all the solutions extracted by heptane showed high levels of free iodine with a preference for one local company. The high level of free iodine was accompanied with an increase of inhibition diameter and rapidity of bactericidal effect.

Surface hardening of 7075 aluminum alloy by electroplating of nickel followed by diffusion treatments

In This research a surface hardening process by Ni coating and subsequent diffusion heat treatments was studied at Al7075 alloy. Nickel coatings with different thickness were obtained.

Study of Parameters of heat treatment for Alloys (Aluminum-Copper)

In this work, the processing of aluminum alloys - copper, which added amounts of copper to aluminum in different parentages (2.5- 4-4.5%) so as not to exceed the limit of saturation Aluminum 6 %( copper).

Distribution of Nitrogen Diffusion Study Through Layer Surface of α – Iron

This paper aims to study the distribution of free nitrogen atoms through surface of α – Fe sample using the numerical solution for linear differential equation by means of Crank – Nicolson method at a temperature range ( 550 to 950 0C) and time interval (0 – 8)h where the nitrogen diffusion constant is at 850 0C and 8h. Under the supposed condition this study has illustrated that the diffusion depth of nitrogen atoms from surface towards inners reaches to ̴ 1.2mm, i.e., determining the layer thickness of the formed nitride compounds which gives the surface layer of α – Fe high resistance against corrosion processes resulting from surrounded environment.

Effectiveness of the diffusion chrome coating on the mechanical and chemical properties of low-carbon steel

In this research, has been studied the spread of chromium atoms mechanism, and mechanical and chemical and properties of the diffusion chrome coating layer in low carbon steel, which is considered one of the surface treatment techniques. Where many practical experiences were carried out in the powdery saturation milieu to form a diffusion coating layer containing atomic chromium who will spread inside the painted surface, and has studied some mechanical and chemical properties after doing diffusion chrome coating. The tests results showed that the tensile strength and micro hardness and chemical corrosion resistance improved after the diffusion chrome coating, also increased the depth of coating layer By increasing the retention time in the oven and temperature, where this relationship is reflected with curve of the second degree. Conversely ductility decreased. Search results confirm the possibility of using diffusion chrome coating as a promising treatment in raising the efficiency of machinery elements that prone to oxidation or chemical corrosion in different temperatures.