conclusions previous abdominal surgery, including previous colonic surgery, confers no added risk of conversion to an open operation, morbidity or mortality for patients undergoing laparoscopic colorectal surgery. the operative time however is longer (30 minutes) for patients with previous colonic surgery. results out of 718 patients 476 had no previous abdominal surgery (group a), whilst 190 p...

The generalized second-price auction (GSP) is used predominantly for sponsored search by leading search engines like Google, MSN-Live Search and Yahoo!. Previous results showed, in a model where all clicks on an ad gain the advertiser the same benefit, that GSP maximizes the social welfare in equilibrium. In practice, however, the probability that a click will convert to a sale for the advertis...

the experimental studies of methane conversion to higher hydrocarbons and methanol using a dielectric barrier discharge (dbd) reactor are presented in this article. the process is carried out at ambient atmospheric pressure and temperature. the dbd reactor is stimulated by an alternative voltage of 50 hz and amplitude of max.23kv. the examination of the effect of voltage and flow rates on metha...