The current art in optimal combinatorial auctions is limited to handling the case of single units of multiple items, with each bidder bidding on exactly one bundle (single minded bidders). This paper extends the current art by proposing an optimal auction for procuring multiple units of multiple items when the bidders are single minded. The auction minimizes the cost of procurement while satisf...

In this research accumulative roll bonding process as sever plastic deformation process was applied up to 8 cycles to produce the ultrafine grain copper. Microstructure of cycle 1, cycle 4 and cycle 8 investigated by TEM images. By analyzing TEM images the grain size measured below 100 nm in cycle 8 and it was with an average grain size of 200 nm. Corrosion resistance of rolled copper stri...

BACKGROUND Migraine is a common headache disorder that can vary menstrually in women and has been linked to an impairment of endogenous pain inhibitory systems. One of these endogenous pain inhibitory systems, namely conditioned pain modulation (CPM; formerly diffuse noxious inhibitory controls-like), has been shown to be affected by the menstrual cycle. The aim of this study was to examine CPM...

background non-organic failure to thrive (nftt) is the most common cause of failure to thrive (ftt) which is attributed to inadequate nutrition due to economic factors or parental neglect. nftt can lead to a vicious cycle of poor and inadequate eating and severity of anemia. the aim of this study was to determine the hematological indices in children with nftt. materials and methods in a cross ...

Input current distortion in the vicinity of input voltage zero crossing of Boost single-phase active power factor corrected rectifier in high line frequency is studied based on one cycle control method in this paper. The current loop model and input admittance model of active power correction based on one cycle control is particularly analyzed. The results point out that its equivalent power st...

Power plants with complex technology have various gradations in design process so that this level in the current time by maintaining the goals of sustainability and sustainable development have a critical importance. These buildings require to be sustainable according to their complexity to provide the finance and discrete budgets for functional needs, meanwhile to design solutions to avoid cre...