decreasing water loss and increasing the irrigation times are basic methods to develop agriculture, success in natural recourse projects, minimize the stress to planted bushes in natural fields and increase the productivity of soil and water sources. the use of super absorbent is one of these strategies to achieve these goals. the main purpose of this research was to study the effect of super a...

In an earlier communication we have developed a recursion based approach to the study of phase stability and transition of binary alloys [1]. We had combined the recursion method introduced by Haydock, Heine and Kelly[2] and the our augmented space approach[3] with the orbital peeling technique proposed by Burke [4] to determine the small energy differences involved in the discussion of phase s...

The surface damage caused by laser irradiation is studied to investigate the possibility of performing a depth-profile analysis of the hydrogen concentration in zircaloy-4 alloys using laserinduced plasma breakdown spectrometry. After laser irradiation, a heat-affected zone extending about 3 μm down from the top surface can be seen. The depth of this heat-affected zone is independent of the las...

in this paper, hardness and tensile properties of welded zone of aluminum 1100 alloys by friction stir welding process was investigated and the effects of rotational and traverse speeds of tool on these parameters was studied. also the fracture cross-section of welded samples was investigated. according the results of this paper, the hardness of weld material is higher than base material and is...