in this study, a new method for joining aluminum tubes in subsurface structures using steel converting and aluminum welding are presented and reviewed. but near the weld area is under high thermal cycle and will cause residual stresses in heat affected zone. therefore for assessment of proposed connection from the perspective of residual stress by using the finite element method welding of tube...

In this paper, a new topology for boost Z-source inverterbased on switched-inductor cell is proposed. The operating modes of the proposed inverter are analyzed and also a suitable control method to generate the trigger signals of the inverter is presented. Having a common earth between the input source and inverter and capability to generate a higher voltage gain by using lower amounts of the d...

[1] The Urey ratio describes the contribution of internal heat production to planetary-scale energy balance, and knowing this thermal budget for Earth is essential to understand its long-term evolution. Internal heat production is provided by the decay of radiogenic elements, whose budget is constrained by geochemical models of Earth. Understanding the thermal budget thus requires contributions...

Advances in data collection and data storage technologies have made it possible to acquire massive Earth science data sets. In principle, these data sets could be transformed into great scientific discoveries. However, due to the heterogeneous nature and to the scale of the available Earth science data, traditional analysis methods are challenged and much of these data remain largely unexplored...

abstract the great quran is the honorable speech of allah which was descended to his honest prophet as a miracle to represent the truth of his mission of summoning people to god. allah- glory to him- has expressed everything in the quran. as the great quran emphasizes, it is full of scientific points and information currently and even very recently discovered by scientists; and it is a wonder t...