A model of consumer behavior has been formulated by using an additive utility function and the hedonic pricing approach, in a virtual market. Since, there is a time lag between ordering and purchasing products (goods and services) online and receiving them, it means the consumer makes decision under uncertainty. The level of satisfaction with products with distinctive characteristics is describ...

contee udo do presente relatt orio e de unica responsabilidade do(s) autor(es). The contents of this report are the sole responsibility of the author(s). Abstract This report presents a framework of integrated transaction and session management to meet the requirements of applications based on group work. Transaction management is provided in order to guarantee data consistency and recovery fro...

An agent operating in the real world must often choose between maximizing its expected utility according to its current knowledge about the world, and trying to learn more about the world, since this may improve its future gains. This problem is known as the trade-oo between exploitation and exploration. In this research, we consider this problem in the context of electronic commerce. An agent ...

background: the pathogenesis of atopic dermatitis (ad) remains to be determined; recently a possible change in the immune system with production of immunoglobulins is proposed. as vitamin e is a potent antioxidant, with the ability to decrease the serum levels of immunoglobulin e (ige) in atopic patients, we aimed to evaluate the effect of oral vitamin e on treatment of ad.materials and methods...

today, e-commerce has considerable portion in commercial businesses, and it has been developing. one of the most important steps in e-commerce is e-payment that has been done through different tools such as e-banking, and e-cheques. in this type of electronic transactions, there are always different worries both for payers and payees due to untruthfulness. for example, amount modifying, date mo...