In Explosive WELDING (EXW) process, there is a situation in which high amount of pressure in collision point leads to decrease in impurity of superficial layers and metal gets in contact with another dissimilar metal and Metallurgical bond can be initiated at the interface. In this paper, in addition to introduction of scarf WELDING, explosive WELDING of aluminium to copper plate in different conditions of explosive loading performed and shear strength of bond was evaluated through new method. The Relationship between shear strength and explosive loading was demonstrated by establishment of non-linear and logarithmic models through regression method and ANOV A table. Adequacy of the developed models was verified in explosive cladding process. Consequently, explosive loading varieties can be evaluated in one experiment by production of scarf joint between dissimilar metals (according to the computational method employed in this paper) and with development of proper model, the shear strength of cladding metals can be estimated.

Welded tubular joints are widely used in various industry structures for high efficiency subjected to pressure, bending and twisting. Welded structures are the main parts of structures, buildings, bridges, gas pipes, pressure vessels and power transmission equipment in the ship building, construction, oil, gas, petrochemical industries and power plants. A sample of pipe-welded joints is a X-tubular joint that has been investigated in this study. The main objective of the present work is to investigate the heat transfer and residual stress caused by the three-stage WELDING process in Xtubular joint made of St52 using Simufact WELDING software. The WELDING process involves three WELDING steps using arc WELDING. The finite element model contains the thermal and mechanical properties of base metal and WELDING metal as a function of temperature. Also, advanced modeling tools such as mesh adaptation during the process and meshing compatible with the WELDING site, the birth and death technique of the element and the source of heat transfer have been used. WELDING simulation showed that significant residual stresses were created in the joint after WELDING. Comparison of the results shows that the numerical results and empirical measurements are in good agreement with each other and the existing model can provide a good prediction of temperature distribution and stress control in this WELDING process.

Considering globalization and very intense competition between the main ports of the world, this paper tries to assess re-engineering processes using new servicing techniques in some of the most important regional and international ports. Today, traditional practices are considered as barriers to growth and expansion of the ports. High speed transportation and cargo handling requires new strategies and technologies. Regarding the intense competition to attract the customers, it is very necessary for Iranian ports to offer new services that satisfy customers. Using Information Technology (IT) and being adherence to international organizations like UN/CEFACT (United Nations Centre for Trade Facilitation and Electronic Business) are some of these practices. Many ports have boomed with increasing global trade and therefore have faced new opportunities. Single WINDOW is one of the technologies that ports use to handle the high volume of goods and cargoes.

"Demographic WINDOW" refers to a particular period, in the demographic history of a population, in which age-dependency ratio falls to an unprecedented low level. This period is short, the beginning and end of it can be estimated, and it lasts about three to four decades.The Demographic WINDOW of Iran began at the threshold of 2006 census and is expected to end by 2046. Therefore, it is expected to last for almost 4 decades. Thereafter, the population of Iran moves towards becoming old, to an unprecedented level in its history.In the demographic history of each country, demographic WINDOW opens once, and during the time it is open, it provides an exceptional opportunity for the development of the country. However, it is not automatic. It should be activated and guided. Demographic WINDOW becomes a demographic bonus only with appropriate preparation: policy-making, planning and correct implementation of programs.Several years, apparently unnoticed, passed since Iran entered its demographic WINDOW. Time is moving fast and this short time span becomes shorter. Therefore, it seems urgent to conduct required studies for the appropriate utilization of this unrepeatable opportunity for the development of the country.

Close encounters with the Western culture and art starts under the Qajar rule. In this period, art elements of the West find their way in the Persian art and architecture. This paper reports the results of a survey of WINDOW-guards extant form the Qajar period in Hamadan City. Of an initial sample of 68 WINDOWs, 26 samples were selected for not being a repetition of other designs. These show a gradual evolution in technique and style of using wrought iron in four phases.In the first phase, a pattern formed with S-shaped elements covers the rectangular area of a WINDOW, while the semicircular area under the spanning arch is usually blocked. In the second phase, by modifying the ‘S’ element, all the WINDOW area is covered. In the third phase, the S element is further modified, its tips become convoluted and its proportions are freely changed to fill rectangular areas. In the fourth phase, the WINDOW-guard is treated as a decorative architectural element. Therefore, in addition to the S element, other decorative spiral elements are used.