The denoising procedure attenuates the image noise while preserving its edges and fine details. In computed tomography, images are degraded by additive white Gaussian noise because of different acquisition and systems errors. Due to noise existence, specialists may encounter certain difficulties to analyze or extract the useful information from noisy images. This paper presents a novel implementation of the phase preserving algorithm to denoise CT images. The phase preserving is a very powerful noise reduction algorithm but it tends to remove specific small details from the processed CT images supposing these details as noise. Therefore, the Wiener filter is used along with the latter algorithm to reduce the noise and aids in conserving the minor medical details. Moreover, selected adjustments to the phase preserving algorithm are applied to obtain a better image contrast and quality. The performance of the proposed scheme is assessed on naturally and synthetically degraded CT images using the universal image quality index (UIQI) metric. Results show major improvement not only in noise attenuation but also in preserving the small details.

Keywords. 3,4-Methylene-dioxy-phenol; On water; Basic alumina; Multi-component one-pot reactions.

In this paper, we present a reliable combined of Elzaki transform and homotopy perturbation method to solve Burger\'s equations. The analytical results of the equations have been obtained in terms of convergent series with easily computable components. The nonlinear terms in Burger\'s equations can be handled by using of homotopy perturbation method. The results tell us that the method is more efficient and easy to handle such partial differential equations.

A study on thin sections, core, and dynamic reservoir in the considered region indicates that dolomite, as one of the diagenetic processes, plays an important role in determining reservoir characteristic. With regard to the available studies, it is obvious that porosity of Sarvak reservoir varies between 2.5 to 3 percent and its estimated permeability is between 0.01- 10 millidarcy. According to the research, one ramp type carbonate platform has been determined in the studied field of Sarvak formation. The formation carbonate facieses consist of framework grains. The framework grains consist of skeletal fragments such as foraminifers, brachiopods, echinoderms, algal fragments, ploids, and minerals. Moreover, the minerals consist of calcite, dolomite, anhydrate, cloy minerals, components which include organic materials, and finally calcareous matrix which is formed in dolomite samples of very fine anhedral and subhedral dolomite crystals.

Among offenses committed by adolescents, robbery has a noticeable importance. Robbery is not a new phenomenon associated with the new period, it has been one of the oldest committed crimes among adolescents, and however, what matters is the prevalence of this crime among adolescents at the present time. Some of the criminologists believe that prevalence of robbery among adolescents is more that other common crimes. To their belief, it is also possible to relate the issue of children and adolescents’ crimes to their committing robberies. The main purpose of the present paper is to study impact of patterns of criminal behavior on simple robbery among adolescents. In order to achieve this purpose,70 adolescents at the age range of 15-19 at correction and rehabilitation center located in Alborz province have been studied based on the researcher’s questionnaire, previously done researches and experts’ opinions in 2012. The researcher’s questionnaire includes demographic factors that affect prevalence of robbery among the adolescents. Results of the present paper show impact of each of the variables on prevalence of robbery among adolescents. In fact, beta weight of parental crime background equals 0.336, beta weight of adolescent’s friends’ crime background equals 0/139, beta weight of having a tendency toward modeling friends’ criminal behaviors equal -0/508, beta weight of offense commitment at adolescents’ educational environment equals 0/150, beta weight of watching movies in which robbery is committed equals -0/190, and beta weight of living in areas where lots of crimes occur equals 0/137. Generally, with regard to the corrected coefficient of coordination determination, beta weight equals 0/62.

The establishment of Safavid rule/government in Iran, due to the determinant impacts it inflicted on the destiny of Iran, Islamic territories and the global equivalences/relations was considered the great event occurred in the beginning years of 10th century A.H, corresponding 16th A.D in the history of world. Before King Esmail Safavid coronated and announced the Esna Ashari (believers of 12 Imams) school of thought/religion as the official religion of Iran, Iranian territory was the field of successive tensions among power pretenders, across the centuries passed since the attack of Mongol, this territory was still deprived of independence and territorial integrity and following that the independent political identity. Concurrent to the beginning of Safavid rule, the Uzbaks in the east and Othmanids ruled in the west of Iran and both of them were making endeavors to expand their influence in the territory of Iran and if a powerful ruler did not took the power in the country of Iran, probably it would have been emerged in the conquests of Uzbaks and Othmanids and became deprived of independence for ever. In such a situation the establishing of Safavid rule and its expansion to the recognized territories of Iran revitalized the country of Iran and provided the ground of national unity shaping by laying the foundation of political and religious independence.