فهرست مطالب morteza asghari

Today, a new trend has started in organizations, and work in organizations has gained a new meaning. Organizations that offer a good quality of work life to their employees have a good index in attracting and retaining employees. Therefore, the quality of employees' working life is the key to any organization's success, increasing employee satisfaction and strengthening their learning and flexibility in a changing environment. Therefore, this research aimed to investigate the causal relationship between personality traits and job stress with the quality of work life through the mediation of job attachment.

The research method was correlation and path analysis. The statistical population of the research was made up of all the teachers and teachers working in education in Ludab region (Boyer Ahmad city) in the academic year 2022-2023. The statistical sample of the research was 250 teachers who were selected by convenience sampling. In order to measure the research variables, Walton's (1973) work-life quality questionnaires, Davis et al.'s job stress (1991), NEO personality traits (Costa & McCree, 1985), and Edwards and Klipatrick's (1984) job attachment were used. Evaluation of the proposed model was done using path analysis.

The findings showed that the direct paths of personality traits and job stress and job attachment with quality of work life and the direct paths of personality traits and job stress with job attachment were statistically significant. On the other hand, the results showed that the indirect paths of personality traits and job stress through job attachment with the quality of work life were significant.

Generally, personality traits and job stress significantly correlate with the quality of work life through the mediation of job attachment in teachers.

There was serious controversy in the 1996 negotiations on the drafting of the ICC Statute on putting aggression on the list of crimes under the jurisdiction of the tribunal, which in turn stemmed from disagreements over the terms of Exercise of the ICC’s jurisdiction. The Review Conference's amendments in 2010 and Assembly state parties 2017 introduced specific rules regarding ICC’s jurisdiction for aggression that differ from the usual jurisdiction of the Court in respect of other crimes within its jurisdiction. It also lacks a clear and precise explanation for ICC’s specific jurisdiction over the crime of aggression, which has sometimes led to disagreements among jurists. Therefore, this paper will examine the ambiguous points of this jurisdiction regime in the Statute as well as the difficulty of applying ICC’s jurisdiction over the crime of aggression after July 17, 2018.

In this study, silver catalysts on SrTiO3 support contain cesium, and rhenium promoters are synthesized using the impregnation method for ethylene epoxidation reaction. SEM results show a small decrease in metal dispersion by adding cesium (3 catalyst. Rhenium leads to the weakening of the peaks intensity in the crystalline structure of the catalysts. In addition, the predominance of Ag (111) surface facets compared to the Ag (110) and Ag (100) surface facets are obvious in the XRD results. The ability of the catalysts in oxygen adsorption and desorption is studied through O2-TPD results. Ethylene conversion increases by adding rhenium to the Ag-Cs/SrTiO3 catalyst in the temperature range of 210 to 220 °C. Ethylene oxide selectivity increases slightly from 80% to 84% in the Ag-Cs-Re/SrTiO3 while this value in the Ag-Cs/SrTiO3 catalyst decreases from 65% to 34%, in the mentioned temperature range. Severe sensitivity of the rhenium-conation catalyst to the inlet concentration of carbon dioxide (6 mol %) is observed through a 50% drop in the produced ethylene oxide compared to the product which doesn’t have any carbon dioxide in the feed.

The Persian Gulf and its coastal areas are considered to be the largest source of crude oil in the world. On the other hand, the waste heat from the refining and petrochemical industries located around the Persian Gulf region can be used based on simple feed conditions for membrane distillation. Therefore, in order to improve the performance of this system in the desalination of Persian Gulf water and increase the flux of output, the mass and heat transfer model is simultaneously introduced into a membrane distillation system and validated with experimental data. The effect of different operating conditions such as feed temperature, vacuum pressure on the permeate side, feed concentration and heat transfer coefficient on the flux permeated have been investigated. Also, the effect of feed temperature on the temperature polarization phenomenon has been studied. The results showed that permeate flux increased with increasing feed temperature and heat transfer coefficient and decreased with increasing vacuum pressure and feed concentration. It was also found that the temperature increase would have an adverse effect on the phenomenon of temperature polarization.

Introduction and Background: Failure to protect and rehabilitate inefficient urban areas often results from dissatisfaction and inactivity of people with regard to imitation and non-conformist versions of urban management practices for modernization. The feasibility of urban renaissance projects seems to require the definition of projects that are based on expectations of the people, in the places where they will be driven to develop and run in a timely manner. Aims: in order to localize the urban renaissance, the Shahid Hasheminejad neighborhood, located in the central area and adjacent to the shrine of the Imam Reza (AS), which nowadays was more exhausted in terms of physical and functional, was considered as a case study. For this purpose, applied research was used and data are collected using interviews and library and field research. Data were analyzed using, SWOT, Hierarchical Analysis and the Strategic Priority Assessment Matrix. The present study was carried out in the first step by introducing and prioritizing the indices and indices of the localization of the urban regeneration approach in two stages of the survey, consisting of 15 specialists and expert. After that, 380 residents, adjacent and business people have been chosen to define the strategic position of the plan and effective strategic priorities in increasing the residents' satisfaction with the process of renaissance of the neighborhood. Finally, in order to explain the research findings based on the extraction of urban renaissance indices for the above neighborhood, twelve desirable sites were evaluated as developmental locations using the hierarchical analysis structure and in order to prioritize proposed projects, in line with localization strategies. The Renaissance approach was considered to be six strategic projects. Finally, using the priority location-assessment matrix, the projects defined as spatial priorities were matched, and a mid-term plan was presented to carry out strategic projects to stimulate the localization renaissance of the Shahid Hasheminejad Neighborhood. The results indicate that timely implementation of the developed plans includes: ownership, agreement, injection of capital, construction and operation; increasing social status, satisfaction and participation of the residents plays a significant role.

Increasing agricultural waste especially pesticides in runoff, water surface and subsurface as well as environmental risks posed by these contaminants has led to its removal from industrial effluents, urban and rural waste water are particular importance. Occurrence of pesticides in wastewater and environmental hazards resulting from its, has created deep concerns about the public health. Paraquat is the most widely used herbicides in Iran and the world. Due to human activities, constant amount of this herbicide is being increasing in the water. Parkinson's disease is the major effect of this pollutant. In recent years, the use of advanced oxidation processes on the basis of strong oxidizing species has received much attention In order to completely remove the dangerous and complex compounds. Among the advanced oxidation methods, Photocatalytic processes have high efficiency in the degradation of various organic materials to biodegradable matter, carbon dioxide and water. In this study, first, the process of photocatalytic has been reviewed. Then, the degradation of paraquat under the visible light in the presence of La,S-TiO2 synthesized Nanophotocatalyst were done. Moreover, for the first time, the effect of operating parameters, including the catalyst dose, H2O2 amount and volume of contamination on the photocatalytic removal efficiency were investigated and evaluated. The results show that the use of H2O2 of 2mL, catalytic dose of 100 mg and volume of contamination of 50 mL, 71.8 % of the Paraquat “Gramoxone” was removed over four hours under visible light irradiation. Furthermore, the results show that the modified synthesized photocatalysis (La,S-TiO2) has much higher photocatalytic activity than undoped TiO2 for the degradation of paraquat at the optimum point.

In this communication, an advanced, simultaneous mass and heat transfer model has been developed to take a meticulous glance on the influences of different parameters on Persian Gulf seawater desalination using Sweeping Gas Membrane Distillation (SGMD) technique. This essay focuses on the increasing the distillate flux by investigation of the physical properties and feed temperature of the sweeping gas membrane distillation on the seawater desalination. The effects of operating parameters, including feed temperature, salt concentration, sweeping gas temperature, and heat transfer coefficient on the distillate flux of the Persian Gulf seawater have been investigated. The effect of feed temperature on temperature polarization has also been studied. By increasing the feed temperature from 25 oC to 60 oC, the temperature polarization increases and the polarization coefficient (TPC) decreases; for instance, for membranes with PP, the TPC decreases from 0.95 to 0.905. By increasing the feed temperature, higher fluxes are achieved for both the gas velocities. Therefore, by increasing the feed temperature from 50 oC up to 80 oC, the distillate flux grows 9 times. Also, the distillate flux for membrane with PVDF as polymer increased from 0 to 4.2 by increasing the feed temperature from 40 oC to 70 oC. The model predictions show a small error of 3.6% with the experimental data reported in literature which indicates the reliability of simulated results.

In this work, separation performance of supported carbon membranes produced from Novolac Phenolic resin as the main precursor and carbon nanotubes as nanofiller were investigated for separation of CO2 from N2 and CH4. Supports were produced by carbonization of Novolac Phenolic resin-activated carbon mixture, and selective layer was coated by dip coating of prepared supports into solutions with different concentrations of Novolac Phenolic resin/carbon nanotubes. The composite membranes were pre-oxidized and carbonized under vacuum condition up to 160°C and 700°C, respectively. Carbon membranes were characterized using FE-SEM, BET, and gas permeation test. Results revealed that the best proportion of Novolac Phenolic resin/activated carbon was 40/60 wt% to make a defect-free and applicable support, most pores of which had sizes less than 10 nm. Membranes were tested at different pressures, and the results showed that CO2 permeability increased with pressure. The carbon membrane made with 40 wt% Novolak phenolic resin and 1 wt% carbon nanotubes showed the best separation performance with CO2/CH4 and CO2/N2 selectivity of 19.5 and 18.3 in 10 bar, respectively.

In this work, performance of composite membranes was investigated for desalination of Kashan city’s water via pervaporation process. PEBA/PAN/PE, PEBA/PSF/PE and PEBA+NaX/PSF/PE composite membranes that used, was synthesized via a phase inversion route. For all experiments under 45◦C, salt rejection was too high and equals to 99.9% that this quantity dropped by increasing the temperature that cause membrane swelling in high temperatures. Water contact angle and water take-up were measured to evaluate the hydrophilicity of the membrane. Also the effect of operating conditions including feed temperature and permeate pressure on permeability and selectivity is discussed. A permeate flux of 4.93 kg/m2h with salt rejection of 99.9% could be achieved at a feed temperature of 50 °C and a vacuum of 0.04 bar. Apparent diffusion coefficients of water at various permeate pressure and feed temperature are calculated. The most effective parameter was feed temperature.

Poly (amide-6-b-ethylene oxide)/Zinc Oxide (PEBA/ZnO) mixed matrix membranes were fabricated using ethanol/water as solvent by solvent casting method. The concentration of ZnO in membrane was set to 0.1 wt.% and the synthesized membranes were characterized by AFM and FTIR. Effects of ZnO nanoparticle on CO2, CH4 and N2 permeabilities, and CO2/N2 and CO2/CH4 selectivities of the membranes were investigated at the ambient temperature and pressure range of 4–12 bar. The results revealed that the CO2 permeability of the nano-composite membrane increased 158 % with pressure, from 54.08 barrer (at 4 bar) to 139.59 barrer (at 12 bar). Furthermore, CO2 permeability for the nano-composite membrane was higher than neat polymeric membrane. The PEBA/ZnO nano-composite membranes thus provide a promising potential for CO2/N2 and CO2/CH4 separation.

Nano-zeolite CoAPO-5 as a member of AFI family, was synthesized via a hydrothermal treatment, and structurally characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray analysis (EDAX). The effects of crystallization temperature and time on the structure of these powder products were studied. XRD patterns of the synthesized powders revealed a high-crystallinity and pure phase of AFI. SEM images and Scherrer equation showed the nano-size of the obtained CoAPO-5. Also, SEM images showed nano-wires as small as 30-50 nm in CoAPO-5 structures. According to EDAX analysis, P/Al ratio of the prepared CoAPO-5 powder was about 1.5. Crystal sizes and the crystallinity of CoAPO-5 reduced at higher temperatures of hydrothermal treatment. On the other hand, the larger crystals grew by increasing the crystallization time from 24 to 48 h.

An overview of the literature from 1975 up to now on hollow fiber membrane contactors for gas-liquid systems and common polymeric membranes, applied in this technology, has beenpresented. Glass transition temperature of polymers is usually determined based on their chemical structures, including chain flexibility and chain reactions. Generally, the factors which cause Tg, Tm or crystallinity of the membranes to be increased, improve their thermal and chemical stabilities. The most important parameters of membrane contactors for acid gases removal, CO2 and H2S, including hydrophilicity and hydrophobicity of the absorbent materials in the membranes, and various models, presented in the literature, have also been presented. In addition, advantages and disadvantages of gas-liquid contactor membranes in acidic gases separation have been studied and the technology has been compared to the traditional methods of separation. Current status and future directions of the technology have been shown and some approaches for future research have been recommended to commercialize this technology.