List of Articles الگوی توزیع فضایی

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  1 - Comparison of population density and spatial distribution of Tydeus longisetosus El-Bagoury & Momen, Tetranychus turkestani (Ugarov & Nikolskii) and their predator Zetzellia mali (Ewing) on two apple varieties
  S. Khodayari K. Kamali Y. Fathipour
  Population density of Tydeus longisetosus El-Bagoury & Momen, Tetranychus turkestani (Ugarov & Nikolskii) and their predator Zetzellia mali (Ewing) on two varieties of apple (Golden delicious and Golab) was studied in Maragheh (Northwestern of Iran) during summe More

  Population density of Tydeus longisetosus El-Bagoury & Momen, Tetranychus turkestani (Ugarov & Nikolskii) and their predator Zetzellia mali (Ewing) on two varieties of apple (Golden delicious and Golab) was studied in Maragheh (Northwestern of Iran) during summer of 2006. The result showed that the mean density of T. longisetosus and T. turkestani on Golden delicious and Golab varieties were 3.35±0.67, 4.02±0.91 and 1.022±0.12, 1.26±0.45 per leaf, respectively. The mean density of Z. mali were 0.829±0.23 and 1.057±0.25 per leaf on Golden delicious and Golab varieties, respectively. Comparison of mean densities on two varieties was done by t-test and showed no significant differences between mean densities on two varieties. Spatial distribution of two species was determined by Taylor's power law, Morisita's coefficient and index of dispersion. Taylor's power law showed that spatial distribution of T. longisetosus on Golden delicious and Golab varieties wasaggregated and random, respectively. T. turkestani was distributed in aggregated pattern on Golab variety and there was no significant relationship between its parameters on Golden delicious, in this way Z. mali was distributed randomly on two varieties too. Aggregated spatial distribution of all species was determined by Morisita's coefficient and index of dispersion on two varieties in most cases. Linear regression between mean density of phytophagous and predaceous mites showed that the predator acts as density independent. Apple varieties have no effect on population density of studied mites but make an effect on spatial distribution of them to some extents.  Manuscript profile
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  2 - Policymaking of spatial components in the formation of new urban cores
  Aziz mohamadyari bakhtyar ezatpanah Karim Hosainzadeh Dalir
  One of the most important issues in today's urban management is the issue of rapid population growth and the consequent rapid expansion of cities, which has faced many problems due to the lack of effective planning and management with this phenomenon. These issues have More

  One of the most important issues in today's urban management is the issue of rapid population growth and the consequent rapid expansion of cities, which has faced many problems due to the lack of effective planning and management with this phenomenon. These issues have shown their effects on the spatial structure of cities in different ways, one of which is the multi-core spatial development of cities. The multi-core phenomenon is inherent in metropolises and studies indicate more efficiency and the effect of quantitative methods in identifying functional cores.The main purpose of this article is to introduce spatial components in the formation of new urban cores. The research method is documentary-analytical and its findings show that the development pattern of the central area in providing various modes of transportation, creating public spaces in order to create distinctive and attractive communities, revitalizing the city center, density policies to achieve intensive development and The protection of green and open spaces has been successful, but it is weak in achieving the criteria of citizens' participation and impartial and predictable decision-making. Manuscript profile