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Future increase of mobile communication subscribers will require a great capacity expansion of the cellular systems. In order to accommodate the increasing number of subscribers, the cell size will have to be much smaller than current size. Therefore, it is predictable that the location updating and paging procedures will produce a major part of signaling traffic in these networks. This paper proposes a location management algorithm for cellular networks that dynamically extract the location and paging areas for every user, based on the user profile. The user profile contains the number of movements between cells and average duration spent in each visited cell. A mobility model is developed to simulate daily movements of the subscribers and used to compare the performance of the proposed dynamic algorithm with current strategy in GSM networks. The results of simulation indicate that the dynamic algorithms significantly outperform the static algorithm, in terms of total location management cost.

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In this paper, experimental comparison between conventional burner and porous burner in domestic purposes as stove, according to Iranian National Standard No. 10325 has been carried out. This comparison between the conventional burner available in the Iranian market and its equivalent porous burner is done. First, flammability of the porous silicon carbide burner was investigated. The results showed that the flame is formed when the equivalence ratio is less than 1, so the best performance equivalence ratio was around 0.7. By changing the distance between the pot and the burner and also changing the pot diameter, it was found that for a pot with 26 cm diameter and burner distance of 1 cm, porous burner efficiency increases to 55%. The comparison between the conventional burner and optimum situation porous burner showed that at the same factors like power, distance between the pot and the burner, the pot diameter, the burner diameter, measuring tools and the same method, porous burner efficiency is 1.5 times more than conventional burner. In conventional burners CO and NOX pollutant are 8-26 and 8 times more than porous burners. Due to higher efficiency and lower emissions, conventional burners can supersede porous burners for domestic purposes.

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The objective of this study was to investigate the synergistic effect of nano titanium dioxide (TiO2-N) and Mentha piperita essential oil (MEO) on the equilibrum moisture sorption isotherm and microbial growth rate of Staphylococcus aureus of cassava starch film. For this purpose, cassava starch biocomposite film with the addition of 1, 3 and 5% TiO2-N and 1, 2 and 3% MEO, and glycerol as a plasticizer were obtained by the casting method. The equilibrium moisture absorption isotherm and antibacterial activity of prepared nanobiocomposite films against Staphylococcus aureus were examined. The obtained results demonstrated that by addition of nanoparticles and essential oil to the starch biocomposites, the equilibrium moisture absorption isotherm curve was shifted to lower moisture content. The microbial tests stated that the pure cassava starch film (control) showed no antibacterial activity against the Staphylococcus aureus and the antibacterial activity significantly increased with increasing concentration of both TiO2-N and MEO in the starch films (p<0.05). However, the antibacterial activity of TiO2-N nanoparticles was higher than MEO. Addition of TiO2-N and MEO increased lag phase and decreased log phase in microbial growth curve. Finally, according to the obtained results in this study, it can be concluded that incorporation of TiO2-N and MEO combination improved the antibacterial activity of cassava starch biocomposites against Staphylococcus aureus and these bionanocomposite films can be used for packaging and extending the shelf life of food products.

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Abstract
Objective: This study aims to find the most suitable type of oral narrative for assessing the transitivity system used by hearing-impaired students studying in ordinary schools with their hearing counterparts.
Methods: Three types of oral narratives, including personal narration, storytelling, and story improvisation were collected. The participants were eighteen hearing-impaired students (selected as an available sample) along with eighteen hearing students. Oral narratives were transcribed and analyzed using Halliday's transitivity system framework. And data analysis was carried out using SPSS 26 and based on the normality of the data in each of the transitivity indicators, two-independent samples t-tests and U Mann-Whitney tests were conducted.
Results: Findings revealed that all three types of oral narratives of hearing-impaired students contained transitivity indicators lower than average, this difference was significant for processes (p=0.047) and participants (p=0.029) in improvisation, and for circumstances only in Personal narrative (p=041). However, in the total three types of narratives, the median difference between the two groups is significant in all transitivity indices (p= 0.24, p=0.022, and p=0.001 for processes, participants, and circumstances respectively).
Conclusion: In light of the results of this research, the storytelling task, which is the most widely used form of assessment in communication disorders, cannot capture the narrative weaknesses of hearing-impaired students enrolled in regular schools, and it is necessary to use more spontaneous narrative tasks such as personal narration and improvisation of narrative in evaluating and rehabilitating these children.