Many performance evaluations for IEEE 802.11distributed coordination function (DCF) have been previouslyreported in the literature. Some of them have clearly indicatedthat 802.11 MAC protocol has poor performance in multi-hopwireless ad hoc networks due to exposed and hidden nodeproblems. Although RTS/CTS transmission scheme mitigatesthese phenomena, it has not been successful in thoroughlyomit...

many performance evaluations for ieee 802.11distributed coordination function (dcf) have been previouslyreported in the literature. some of them have clearly indicatedthat 802.11 mac protocol has poor performance in multi-hopwireless ad hoc networks due to exposed and hidden nodeproblems. although rts/cts transmission scheme mitigatesthese phenomena, it has not been successful in thoroughlyomit...

Proof. Let (α1, . . . , αn) be any Q-basis for K; we first claim there for each i, there exists a non-zero di ∈ Z such that diαi ∈ OK . Indeed, it is easy to check that it is enough to let di be the leading term of any integer polynomial satisfied by αi. Thus, for any non-zero β ∈ I, we find that (βd1α1, . . . , βdnαn) is a Q-basis for K contained in I. It remains to show that such a basis with...

Motivated by the problem of predicting chemical deposition in eastern USA at weekly, seasonal and annual scales, the paper develops a framework for joint modelling of pointand grid-referenced spatiotemporal data in this context. The hierarchical model proposed can provide accurate spatial interpolation and temporal aggregation by combining information from observed point-referenced monitoring d...

A bionic search architecture has been developed to solve the problem of placing VLSI elementsbased on hybridization algorithms a bee colony and swarm chromosomes,which allows you get out "local holes" increases convergence placement algorithm. The initial iterations are implemented by algorithm provide broad overview ofthe area, final chromosome algorithm,which ensures exact localization extrem...

Keywords: protection of rights, intellectual property; patent, industrial design, invention,utility model, appeals chamber, patent trolling
 The right property is the leading drivingforce economy any state; therefore its legal requires proper legalregulation and constant improvement through adoption new laws, amendmentsto current acts, introduction innovations in judicial activity.On 21.07...