مطالب

Multicasting is an important operation in software-defined wireless sensor networks (SDWSNs). In this operation, a group of nodes specified by their unique node identification numbers is supposed to receive the same multicast message at the approximately same time, if possible. These nodes are termed as multicast members or multicast destinations. They need not be physically close to one another to form a group. The present article proposes an energy-efficient scheduler exclusively for multicast operation in the SDWSN environment. Based on the advantages provided by underlying network architecture, a router can efficiently schedule multicast packets belonging to various multicast sessions. This promotes greenery in the network and significantly increases the packet delivery ratio. These claims are supported and justified by the experimental results presented in this paper. As far as the authors know, there is no multicast packet scheduler in the literature of wireless sensor networks or WSN. SDWSN is a more advanced version, and no multicast protocol has yet been proposed for these kinds of networks. Therefore, while designing the present fuzzy scheduler, we kept in mind all standard multicast protocols in the WSN environment.

This study aims to present qualitative and quantitative explanations of eight kinds of charcoal discovered from an archeological site at Tepe Kelar in northern Iran. The excavations were carried out in 2006 and 2008. In addition to cultural remains, different kinds of charcoals were discovered hence, their descriptive analysis provided valuable information about culture and ecology of the region during the prehistoric period. To analyze the samples, thin transverses and their radial sections were prepared and analyzed using Electron Microscope, and specifications of the vessels, tissue, wood rays, and other elements of them were measured and recorded. The identification of the woods was initially conducted through the microscopic properties of hardwood and the findings were then compared with the Atlas of woods in North of Iran. The taxonomic identification using the wood anatomy showed that four samples belong to the genus Fagus Orientalis Lipsky 1898, one of which belongs to genus Corylus Avellana 1753 and the remaining three samples were not recognizable due to their small size. In the third trench, ruins of a metal melting kiln were discovered together with large pieces of charcoals. It is likely that wood species identified in this study were used to melt metals in the Bronze and Iron Ages.

Background: Organizational politics within organizations, like the power around the manager, is broad and widespread, and managers consider political behavior as a part of organizational life that is inevitable, and on the other hand, the impact of ethics on social and especially political behaviors is undeniable. Therefore, the purpose of this study was to design and validate organizational policy indicators based on political ethics. Method: The method of the present study was integrated (qualitative and quantitative) and in terms of purpose was applied research. The qualitative section consisted of experts with experience in the field of political behavior who interviewed 11 people using purposive sampling. The texts of the interviews were also analyzed by coding method. In the quantitative part, the statistical population was the heads and experts of the Ministry of Interior (101 people). The sample size was selected based on Morgan and Krejcie table of 80 people by random sampling method. The research instrument was a completed questionnaire with 3 dimensions, 10 components and 99 indicators, the reliability of which was obtained by Cronbach's alpha test of 0.91. Structural equations with Smart Pls software were used to analyze the data. Results: The results showed that the organizational, personal and job dimensions had (0.57, 0.44, 0.37) direction coefficient in the organizational policy model based on political ethics, respectively, and the research variables could be 0.66, the perception variable. Predict organizational policy based on political ethics. Also, the overall fit of the model was evaluated at a very high level (GOF = 0.59). Conclusion: The model of perception of organizational policy indicators based on political ethics with 3 dimensions and 10 components has a good fit and can be considered as a suitable model of political behavior in public and private organizations in Iran.