Simulated Tornado Optimization

We propose a swarm-based optimization algorithm inspired by air currents of a tornado. Two main air currents - spiral and updraft - are mimicked. Spiral motion is designed for exploration of new search areas and updraft movements is deployed for exploitation of a promising candidate solution. Assignment of just one search direction to each particle at each iteration, leads to low computational complexity of the proposed algorithm respect to the conventional algorithms. Regardless of the step size parameters, the only parameter of the proposed algorithm, called tornado diameter, can be efficiently adjusted by randomization. Numerical results over six different benchmark cost functions indicate comparable and, in some cases, better performance of the proposed algorithm respect to some other metaheuristics.Comment: 6 pages, 15 figures, 1 table, IEEE International Conference on Signal Processing and Intelligent System (ICSPIS16), Dec. 201

Language and culture: the importance of cultural language to enhance the teaching and learning of Persian language in a Persian heritage language school

This research project tries to investigate how the integration of culture and language or Cultural Language can enhance the teaching and learning of the Persian language in a Persian Heritage Language school. Furthermore, it aims to investigate the relationship between Persian Heritage Language and its effect on conserving the cultural awareness of the second and third-generation Muslim Persian - British in London. In this project, I attempt to propose a new framework with a ‘cultural syllabus’ to be incorporated into language education to develop, preserve, and revitalize Persian language skills amongst the future Persian generation living abroad. In another word, my research is aiming to link the teaching of cultural matters with the Persian language to impact positively on the children’s general attainment in the Persian language. To do this, I started to conduct a participatory action research project through the lens of ethnography. I employed four main types of research methods and techniques: classroom observations, focus groups, feedback interviews or conversations and reflection sheets. Three groups of participants took part in this research. The main participants of the investigation were a group of 75 Persian-English bilinguals (boys 35 and girls 40; mean age: 10.3) who have been living in the UK for different lengths of time (mean: 6.9 years). The second group consisted of 5 monolingual Persian teachers in the UK. The third group of participants were sixteen Persian parents who were born in Persia and immigrated to the UK at different ages. The main areas of impact found in data extended to (a) teachers’ personal and professional development; and (b) impact on learners, parents, and the educational environment. In the light of the findings from this project, I found that cultural and Islamic elements with the Persian language should not remain separate entities and insisted that their integration can contribute towards a holistic approach to the teaching and learning of the Persian language. Hence, this research has given important support for the positive impact of cultural familiarity in the culturally-oriented syllabus for language learning enhancement in heritage language contexts. Furthermore, I found that heritage schools like IRIS School allow children a safe haven for exploring cultural and linguistic awareness

A New Protocol for Cooperative Spectrum Sharing in Mobile Cognitive Radio Networks

To optimize the usage of limited spectrum resources, cognitive radio (CR) can be used as a viable solution. The main contribution of this article is to propose a new protocol to increase throughput of mobile cooperative CR networks (CRNs). The key challenge in a CRN is how the nodes cooperate to access the channel in order to maximize the CRN's throughput. To minimize unnecessary blocking of CR transmission, we propose a so-called new frequency-range MAC protocol (NFRMAC). The proposed method is in fact a novel channel assignment mechanism that exploits the dependence between signal's attenuation model, signal's frequency, communication range, and interference level. Compared .to the conventional methods, the proposed algorithm considers a more realistic model for the mobility pattern of CR nodes and also adaptively selects the maximal transmission range of each node over which reliable transmission is possible. Simulation results indicate that using NFRMAC leads to an increase of the total CRN's throughput by 6% and reduces the blocking rate by 10% compared to those of conventional methods

A New Method For Digital Watermarking Based on Combination of DCT and PCA

In the digital watermarking with DCT method,the watermark is located within a range of DCT coefficients of the cover image. In this paper to use the low-frequency band, a new method is proposed by using a combination of the DCT and PCA transform. The proposed method is compared to other DCT methods, our method is robust and keeps the quality of cover image, also increases capacity of the watermarking.Comment: Telecommunications Forum Telfor (TELFOR), 2014 22n

Distribution and abundance of high aquatic plants in the Gorganroud River, the Caspian Sea basin, Iran

The distribution and abundance of high aquatic plants in the Gorganroud River was examined at five stations in four seasons (20 samples) over one year period during 2009-2010. We identified 21 species of aquatic plants from 21 genera, belonging to 9 families. These species were determined as 3 halophytic species (14.2%) and 18 high aquatic plants (85.7%).The highest species diversity was observed at Khajenafas, Aq qala and Chargoli stations(17, 13 and 11 species) respectively, The highest biomass of high aquatic plants were recorded in summer (for Inspection and Chargoli stations 11.5 and 10.1 g.m-2, respectively) and autumn (for the station of Inspection was 8.5 g.m-2 dry weight). The most dominant species were different in the investigated stations. At station 1 species Tamarix kotschyi, at station 2 species Juncus acutiflorus, at station 3 species Hordeum murinum hudson, at station 4 species Salicornia europaea L and at station 5 Juncus acutiflorus species were dominated