the aim of this paper is to characterize welding of aisi 310 austenitic stainless steel to inconel 657 for use in oil-refining industries. the welds were produced using four types of filler materials; nickel-based alloys designated as inconel 82, a, 617, and 310 ss. the interfaces and heat-affected zones were characterized by optical and scanning electron microscopy. interfaces on the two sides...

I. Eighty-seven rats were fed a diet of milk treated with hydrogen sulphide together with copper-free mineral and vitamin supplements. Forty-three of the eighty-seven rats were used as controls and given Cu supplements varying from 50 to 500 pguglweek. In addition to the eighty-seven rats, twenty-eight rats were fed a commercial diet. 2. Rats which did not receive Cu supplements developed signs...

A roentgenographic scoring system was developed to help orthopaedic surgeons and bone banks estimate the quality of bone stock in proximal femoral allografts intended to use in revision arthroplasty. This system scores a standardized anteroposterior roentgenograph of the proximal femur using four indices representing morphological features of cancellous and cortical bone known to be clinically ...

We consider the problem of allocating berth positions for vessels in tidal bulk port terminals. A berth is defined as a specific location alongside a quay where a ship loader is available for loading or unloading vessels, accommodating only one vessel at a time. In tidal ports, draft conditions depend on high tide conditions, since available depth at low tide is not adequate for the movement of...

This paper develops three polynomial-time pricing techniques for European Asian options with provably small errors, where the stock prices follow binomial trees or trees of higher-degree. The first technique is the first known Monte Carlo algorithm with analytical error bounds suitable for pricing single-stock options with meaningful confidence and speed. The second technique is a general recur...

Most research on supply chain management deals with settings where firms do not voluntarily get rid of inventory in the system. Since voluntary inventory reductions are often observed in practice, in this paper, we propose a (multi-echelon) model where the firm can dispose of excess stock through sales in the secondary market at each stage in the supply chain. What are called nested echelon bas...

The stock market, which has been investigated by various researchers, is a rather complicated environment. Most research only concerned the technical indexes (quantitative factors), instead of qualitative factors, e.g., political e ect. However, the latter plays a critical role in the stock market environment. Thus, this study develops a genetic algorithm based fuzzy neural network (GFNN) to fo...