Geosynchronous orbit (GEO) is a very important strategic resource. In order to maximize the utilization of GEO resources, use all-electric propulsion platforms can greatly extend service life satellites. Therefore, this paper proposes control scheme north/south station keeping (NSSK) by using electric with manipulator. First, on basis traditional calculation method semi-diurnal period orbital i...

background: sediments are inseparable fractions of wetland ecosystems that work as a his-torical archive in the process of recording heavy metal aggregation changes. this study was carried out for assessing co, ni, and zn in sediment samples of mighan wetland using geo-accumulation index in 2013. methods:the sediment samples were taken from 11 stations. the samples were subjected to bulk digest...

this article is a report of a research project aimed at developing a strategic plan for the department of library and information science (lis), ferdowsi university of mashhad the aim of the project was to identify the factors and a model for designing the strategic plan for lis department. according to the process of strategic planning, external and internal studies carried out. in these studi...

this article aims at strategic vision to technology and suggests a strategic planning for this purpose. the main emphasis in this article is on strategic report compilation in the framework of strategic vision and covers issues such as identification of strategic planning dimensions and strategic vision levels, technology priority setting, environment monitoring, focus on costumer needs, method...

after the collapse of the soviet :union: and the formation of a new world order, the nature of power changed from exclusively military to a combination of military, economic and political one; and consequently the new discourse of geo-economics emerged alongside the geo-politics. since then, most countries have tried to maximize their relative power positions in the international system by emph...

This paper proposes a new location of the Lycaonian city Thebasa at Pınarkaya (Divaz) in province (il) Karaman and provides critical analysis its previous identifications. It revaluates importance broader, geo-historical context pointing out transformation from commercial hub to strategic military base. Through several unpublished sites, presents fresh look settlement communication networks Mid...