فهرست مطالب jafar mahmoudi

Family in all human societies, has been considered as the basic social institution and community infrastructure and the source of human cultural history. Addressing this fundamental and sacred structure has always modified the large family of humans, whereas human negligence regarding this concept leads them away from reality.

This study aimed to identify the factors affecting marital infidelity in cyberspace by phenomenological analysis of lifestyle.

This research was conducted with a qualitative approach and phenomenological method. The statistical population of the research included couples applying for divorce referred by the court in Marand City in 2022. The sample size consisted of 14 participants who were selected by non-probability and purposeful methods. The instrument of the present study was a semi-structured interview. The data was coded and analyzed by the thematic analysis method.

After coding the interviews and categorizing the topics, 4 main themes were family-educational, individual, couple, and environmental-social.

The results showed that if individuals in the family of origin do not acquire the appropriate behavior pattern and adults committee the non-consuming lifestyle and do not try to acquire them and form a healthy couple identity, they will be prone to breach of contract in inappropriate environments.

This article is part of the e-cooling project which has been granted by OutoKumpu and Intel. The ‎author has been project manager aiming for optimization of the heat sink application. In this ‎regard, several articles through 2006 to 2012, have been published to explain the chain of the process ‎‎(casting, machining, welding) using the Pin-Fin technology.‎ In 2011 to 2015, The project has been recapped and aiming to develop next design heatsink ‎‎(combined copper- Aluminum heat sink) with special focus for the subsea application. The Risk ‎analyses of the new heat sink design have also been studied. A new model has been developed ‎for industrial production/ optimization process from casting to final processing.‎ The mathematical modeling has been primarily employed to solve the source code addressing the ‎energy of the dissipation rate using the 3D Navier-Stokes equations. The Ansys Fluent has been ‎employed as the modeling software to implement the source term as subroutine. In this industrial ‎research work the implementation of the mathematical modeling in the Ansys Fluent software is ‎a critical part of the work aiming for design and optimization of the heat sink within SCI ‎application‎.

The present study aimed to investigate the effect of Cognitive-Behavioral Therapy on pre-school children’s anxiety. The research method was semi-experimental with pre-test and post-test design with control group. The statistical population of the study was all students with anxiety disorders in Abhar, Zanjan. The statistical sample consisted of 30 subjects (anxiety disorder) who were selected by cluster-sampling method and randomly were embedded in two experimental and two control groups. Preschool Anxiety Scale (PSA) and Conner’s Form were used for pre-test and post-test. At first, a pretest was performed on subjects in all four groups, and then the subjects received 12 sessions of 1 hour weekly two sessions of remedial education. After the intervention, the subjects in each of the four groups were evaluated by post-test. For analyzing the data, covariance analysis was used. The results showed a significant difference between the mean of post-test scores of the experiment and control groups (anxiety disorder) (P <0.05 and F = 50.33) .In other words, cognitive-behavioral therapy reduces children's anxiety.

In this research, a modified TiO2/Bentonite (Be) composite with various values of zinc oxide was used as a photocatalyst in the degradation of methyl orange as a dye pollutant. The synthesized composites were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence (XRF), and Thermal gravimetric analysis (TGA). The results showed that the composite synthesized by 6.5% zinc oxide had the highest anatase phase and appropriate thermal stability. Moreover, the simultaneous effect of different parameters was investigated using the central composite (CC) design defined under response surface methodology (RSM). The results showed that the polynomial model obtained from the analysis of variance (ANOVA) correctly predicted the experimental data. The optimal conditions of dye degradation for the synthesized composite with 6.5% zinc oxide using 4 g/L of photocatalyst for 30 minutes at a pH=5 and a dye concentration of 20 ppm had the highest degradation percentage equal to 95% with a high desirability of 0.981. Also, the photocatalytic activity of TiO2/Be/ZnO (6.5%) in certain conditions for reuse in five consecutive steps showed a slight decrease in the degradation of methyl orange.

Responding to the needs of the organization and meeting these needs in a timely manner, at the right rate, at the right price and quality, at the right time and place and from the right suppliers, except by creating integration between different parts of the organization including suppliers, consumers, storage and distribution centers. Transportation and other parts of the logistics service provider in the organization will not be realized. In this study, using factor analysis and structural equation modeling, the conceptual model of logistics integration based on the three dimensions of integration (internal integration, supplier integration and consumer integration) was presented and approved. The data collection tool is a questionnaire and Cronbach's alpha coefficient was used to assess the reliability of the questionnaire. Based on the results, it was found that seven components of logistics internal integration (strategic integration, process integration, planning and control integration, information integration, structural integration, knowledge integration and budget and credit integration), four components integrating (integrating management) Information integration with suppliers, demand management integration and new product development integration) and the three components of integration with consumers or customers (integration of consumer management, integration of information with consumers, and integration of consumer satisfaction) are effective in the logistical integrity of the defense organization under.

Photodegradation of methyl orange was investigated using synthesized TiO2:Mg2+/zeolite as the photocatalyst. The photocatalyst was characterized by X-ray, XRF, FT-IR, and SEM. The photocatalytic activities of TiO2:Mg2+/zeolite samples were evaluated in the degradation of methyl orange under visible light irradiation. The appropriate content of Mg in the composite was obtained as 4.711 wt% with 100% removal of methyl orange in 50 minutes. The influence of irradiation time, catalyst concentration, pH, and calcination temperature on the photodegradation of methyl orange was investigated, and the appropriate amounts obtained for these parameters were 60 min, 5 g/l, 10, and 450 °C, respectively. The degradation of methyl orange over TiO2:Mg2+/zeolite was about 82% after five cycles, confirming the suitable reusability of the photocatalyst.

The development of information and communication technology in the last decade has affected all aspects of human life. Electronic governance includes the use of information and communication technology by the government to realize indicators such as accountability, responsibility, justice, etc., which has led to improvements in indicators such as per capital income, GDP, income distribution, inflation, employment and, finally, improvement of human life. Regarding this issue, the present study explores the effects of electronic governance on sustainable human development. The research has two stages: “conceptual framework design” and “validation of the conceptual framework”. In the first phase, by studying and analyzing background of the subject, the conceptual framework of the research was designed. Therefore, first, sustainable human development indicators and then electronic governance indicators were extracted from the literature and a conceptual framework was developed. In the second phase of the research, the validity of the conceptual framework was examined by a survey of experts. So the method of doing this research is quantitative and scrolling. Findings of the research indicate that, from the experts’ point of view, all of the indicators of e-government are affecting all of the indicators of sustainable human development, except for two cases that the effect of e-commerce index on life expectancy and the impact of the index of communication infrastructure on life expectancy confirmation failed. Also, the average of ratings showed that the importance of the impact of the human capital index on sustainable human development was more important than the view of the experts.

In this research, the composite of TiO2/Zeolite as a cheap and effective photocatalyst was prepared for the removal of methyl orange dye in water solution. At first, TiO2 solution was successfully synthesized and then combined with appropriate amount of Clinopatilolite zeolite. The prepared samples were calcined at different temperatures. The synthesized photocatalysts were characterized by, X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and Fourier transform infrared (FTIR). The effect of the calcination temperatures and the amount of zeolite in composite of the as-synthesized photocatalysts on crystal structure, morphology and photocatalytic degradation of methyl orange dye solution were studied. The results of the experiments showed that combining of zeolite with TiO2 induced the enhancement of photocatalytic activity and optimal zeolite content was obtained about 0.1 g (0.33 wt.% ). Also calcination temperature has a great influence on the photocatalytic activity of the synthesized samples. The optimal calcination temperature was obtained 300⁰C. The composite of TiO2/Zeolite powders obtained from the optimum condition showed uniform spherical shape, anatase crystalline structure and few agglomerates. The methyl orange was removed more than 96% within 60 min of the process with optimum calcinations temperature and zeolite content.

In this research, the removal of lead from the aqueous solution was investigated using natural nontoxic zeolite (clinoptilolite) as a low-cost adsorbent in order to reduce human exposure to it. The clinoptilolite zeolite obtained from the Semnan area was characterized by X-ray diffraction pattern, FTIR spectroscopy and scanning electron microscopy (SEM). The central composite design (CCD) defined under the response surface methodology (RSM) was used for designing the experiments and analyzing the sorption of lead. Three parameters of contact time (43.07-101.93 min), initial concentration (508-3006 mg/L) and temperature (20-51˚C) were applied to optimize the removal percentage of lead by zeolite. It was found that the initial concentration is the most important parameter affecting the removal percentage of lead, followed by the temperature of process. The optimum values of initial concentration, contact time and temperature were found to be 2750 ppm, 82.87 min and 65°C for 99.81% removal of lead, respectively, with a high desirability of 0.990. The adsorption data fitted the Freundlich adsorption model better than the Langmuir model, with the maximum sorption capacity of the clinoptilolite zeolite for Pb(II) equaling 136.99 (mg/g).

Corporate governance is the system by which corporations are directed and controlled. Corporate governance also provides the structure through which company objectives are established، the means to achieve these objectives، and how to monitor their performance. ICTs have the potential to make organization and its services more transparent by providing easy access to information. This research aims to evaluate the relationship between information technology governance and corporate governance. The survey sample population consisted of 178 randomly taken managers and employees who work in public organizations. To examine the hypothesis، we use canonical correlation analysis. An important part of results from canonical correlation analysis indicated that there is a proper linear mixture between the variables of canonical effective factors on corporate governance and its components.

Alkylation of benzene content in benzene cut produced by Iranian petrochemical company over ZSM-5 zeolite as catalyst was investigated in three phase reactor. In this work، the effects of operating temperatures (140، 170 and 200°C) and benzene/propylene (B/P) molar ratio (over the range of 1 to 7) were studied on the product distribution. Based on the obtained experimental data، it is concluded that an increase in B/P molar ratio from B/P=1 to B/P=7، enhances the selectivity of cumene as major product from 71. 042% to 81. 369%. However the conversion of benzene was decreased with increasing B/P molar ratio. Also the experimental results demonstrated that by enhancement in the temperature، selectivity of cumene was decreased from 79. 579% to 67. 965% and the benzene conversion was increased. The results showed that ZSM-5 has a suitable selectivity for cumene production in alkylation of benzene by propylene in presence of ZSM-5 zeolite as catalyst.

Dewatering of concentrates, tailings, etc. is an important process in most mineral processing operations. Flocculation is usually a necessary pretreatment step in many dewatering streams containing significant quantity of very fine particles. A large volume of research has gone in to optimising the use of various high molecular weight polymers as flocculants for fine particle suspensions.In this research, the effect of anionic polyacrylamide concentration as flocculant on velocity of settling is investigated. Flocculation experiments were conducted using the The kaolin suspension containing 5% solid (w/w) was first stirred thoroughly in a beaker. Then the requisite amount of flocculant was then added drop wise under continued stirring condition. The flocculation experiments were followed by sedimentation tests. The entire suspension after flocculation was transferred to a graduated cylinder and allowed to settle. A clear liquid– slurry interface could be seen descending. The height of this interface was noted at a regular interval of time. Settling rates at concentration of 2,4,6 and 8 ppm from flocculant were measured from the slope of the straight-line portion of the plot of interface height vs. settling time. By use of results, the optimum concentration of flocculant determined.

To obtain advantages of entrepreneurship in the Iranian governmental organizations, focusing on entrepreneurial structural success factors is essential. One of the critical factors in these entrepreneurial structural success factors is entrepreneurial information system (IS). Most of the Iranian governmental organizations are due to generate entrepreneurial IS and implement enterprise IT architecture project. The assessment of enterprise architecture project is necessary in terms of high cost and the need of monitoring entrepreneurial IS development in organizations. The current study has employed enterprise architectural maturity assessment framework for evaluating and measuring entrepreneurial IS progress. By applying this framework at the Deputy,s Office for Planning of the Ministry of Commerce, the current maturity state of this organization and its strengths and weaknesses are demonstrated. Then by using the result of this maturity assessment, the IT investment priorities for enhancing and improving entrepreneurial IS are revealed.

The precise Liquid - liquid equilibrium (LLE) data are needed and required in design of many chemical processes, separation operations, and fermentation industry. In this research, (LLE) data for (trichloroethylen + propionic acid + water) were determined at atmospheric pressure and 300.15 K. LLE phase diagram was obtained for this ternary system. The distribution coefficients and the selectivity factors of the solvent were calculated. It can be seen that the separation factor values decrease from 10.55 to 4.317 with increasing propionic acid weight fraction in aqueous phase from 0.06 to 0.4.

The precise Liquid - liquid equilibrium (LLE) data are needed and required in design of many chemical processes, separation operations, and fermentation industry. In this research, (LLE) data for (trichloroethylen + propionic acid + water) were determined at atmospheric pressure and 300.15 K. LLE phase diagram was obtained for this ternary system. The distribution coefficients and the selectivity factors of the solvent were calculated. It can be seen that the separation factor values decrease from 10.55 to 4.317 with increasing propionic acid weight fraction in aqueous phase from 0.06 to 0.4.

In recent years, ERP systems are in high demand among government organizations in Iran. Therefore, many large government organizations try to run ERP implementation projects. A number of projects failed because they faced with some challenges and difficulties in the way that the ERP are implemented. The failure depends on the government organization conditions such as organizational readiness for ERP, infrastructures, management and also depends on the general situation of the country such as political constraints and sanctions. In this paper we try to identify critical success factors (CSFs) for ERP systems in the government organizations of Iran with emphasis on the Iran's Commerce Ministry. To end this, we first review the ERP systems literature. Moreover, the domestic projects related to implementing ERP in Iranian company are evaluated. Then, a questionnaire is designed to gather information. The questionnaires are completed by information system experts. Finally, we analysis the collected information and identify the most important CSFs to implement successful ERP system in large governmental organizations.