In electronic auction applications, small-value merchandise is often distributed. We call this kind of auction micro auction. Compared to traditional general-purpose electronic auction, micro electronic auction has its own special requirements. Especially, micro auction must be very efficient: the cost of the auction protocol must not be over the cost of the merchandise for sale. Although the m...

A sealed atmosphere in a mined-out area of an underground coal mine is simply a volume with homogeneous composition governed by boundary conditions. This paper presents a mathematical model based upon the conservation of mass principle that describes the flow of air (nitrogen and oxygen), methane and carbon dioxide into and out of a sealed atmosphere and the time-dependent changes in gas concen...

Recently electronic tap-changer has received more attention due to its quick response, better performance and simpler maintenance compared to the mechanical tap-changer. This paper presents the capability of the distribution transformer equipped with an electronic tap-changer for improving power quality. At this end, the analytical computation for determining the compensating limit of electroni...

pain management is crucially important in the postoperative period as it increases patient comfort and satisfaction. the primary outcome of present study was to evaluate the effect of sufentanil added to hyperbaric bupivacaine solution 0.25% in transversus abdominis plane (tap) block, on postoperative analgesic consumption. fifty asa physical status i–ii term primiparous single-tone pregnant wo...